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Figueroa-Torres MZ, Meneses-Rodríguez D, Obregón S, Cano A, Vázquez A, Hernández-Adame L, Ruiz-Gómez MA. Enhanced photocatalytic performance of colored Ti 2O 3-Ti 3O 5-TiO 2 heterostructure for the degradation of antibiotic ofloxacin and bactericidal effect. CHEMOSPHERE 2024:143247. [PMID: 39236922 DOI: 10.1016/j.chemosphere.2024.143247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 08/26/2024] [Accepted: 08/31/2024] [Indexed: 09/07/2024]
Abstract
Removing emergent contaminants, such as pharmaceuticals, and inhibiting bacteria by photocatalysis represents an interesting alternative for water remediation. We report the effective preparation of colored powders containing Ti2O3, Ti3O5, and TiO2, by a simple thermal oxidation reaction of a Ti2O3 precursor from 400 °C to 800 °C. The material obtained at 500 °C (P500 sample) exhibited the highest photocatalytic performance under simulated solar light, reaching 54 % degradation of antibiotic ofloxacin and a bacteria inactivation of 51 % and 62 % for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively. The superoxide anion radical was the main specie contributing to the photodegradation of ofloxacin, while the hydroxyl radical showed negligible effect. A synergy between the physicochemical properties of the phases in the P500 sample contributes to the electrons transfer, visible light absorption capability and generation of reactive oxygen species, resulting in its remarkable photoactivity. The comparison in terms of surface-specific activity revealed that the P500 sample is more efficient than commercially available TiO2 P25. This fact opens the option of using commercially available Ti2O3 and TiO2 P25 to obtain composites for promoting photoinduced reactions using natural solar light.
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Affiliation(s)
- M Z Figueroa-Torres
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ingeniería Civil, San Nicolás de los Garza, Nuevo León, 66455, México.
| | - David Meneses-Rodríguez
- CONAHCYT-Departamento de Física Aplicada, CINVESTAV-IPN, Antigua Carretera a Progreso km 6, Mérida, Yucatán, 97310, México.
| | - Sergio Obregón
- Universidad Autónoma de Nuevo León, UANL, CICFIM-Facultad de Ciencias Físico Matemáticas, Av. Universidad S/N, San Nicolás de los Garza, Nuevo León, 66455, México.
| | - Arely Cano
- Solid State Electronics Section, Electrical Engineering Department, Center for Research and Advanced Studies of the National Polytechnic Institute, 07360, Mexico City, México.
| | - Alejandro Vázquez
- Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N, San Nicolás de los Garza, Nuevo León, 66455, México.
| | - Luis Hernández-Adame
- CONAHCYT-Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S., 23096, México.
| | - Miguel A Ruiz-Gómez
- CONAHCYT-Departamento de Física Aplicada, CINVESTAV-IPN, Antigua Carretera a Progreso km 6, Mérida, Yucatán, 97310, México; División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica, A.C. Camino Presa San José 2055, Lomas 4a Sección, San Luis Potosí, S.L.P., 78216, México.
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2
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Tjardts T, Elis M, Shondo J, Voß L, Schürmann U, Faupel F, Kienle L, Veziroglu S, Aktas OC. Self-Modification of Defective TiO 2 under Controlled H 2/Ar Gas Environment and Dynamics of Photoinduced Surface Oxygen Vacancies. CHEMSUSCHEM 2024; 17:e202400046. [PMID: 38739088 DOI: 10.1002/cssc.202400046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/18/2024] [Accepted: 05/10/2024] [Indexed: 05/14/2024]
Abstract
In recent years, defective TiO2 has caught considerable research attention because of its potential to overcome the limits of low visible light absorption and fast charge recombination present in pristine TiO2 photocatalysts. Among the different synthesis conditions for defective TiO2, ambient pressure hydrogenation with the addition of Ar as inert gas for safety purposes has been established as an easy method to realize the process. Whether the Ar gas might still influence the resulting photocatalytic properties and defective surface layer remains an open question. Here, we reveal that the gas flow ratio between H2 and Ar has a crucial impact on the defective structure as well as the photocatalyic activity of TiO2. In particular, transmission electron microscopy (TEM) in combination with electron energy loss spectroscopy (EELS) revealed a larger width of the defective surface layer when using a H2/Ar (50 %-50 %) gas mixture over pure H2. A possible reason could be the increase in dynamic viscosity of the gas mixture when Ar is added. Additionally, photoinduced enhanced Raman spectroscopy (PIERS) is implemented as a complementary approach to investigate the dynamics of the defective structures under ambient conditions which cannot be effortlessly realized by vacuum techniques like TEM.
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Affiliation(s)
- Tim Tjardts
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
| | - Marie Elis
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
| | - Josiah Shondo
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
| | - Lennart Voß
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
| | - Ulrich Schürmann
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Franz Faupel
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Lorenz Kienle
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Salih Veziroglu
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Oral Cenk Aktas
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
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3
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Song X, Meng Y, Zhou X, Cheng K, Liang Y, Yang Z. Red mud accommodated mesoporous black TiO 2 framework with enhanced organic pollutant photodegradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:8689-8702. [PMID: 38180661 DOI: 10.1007/s11356-023-31666-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024]
Abstract
In this work, black TiO2 (BTiO2) loaded on black red mud (BRM) was successfully prepared with the conversion of Fe2O3 into magnetic Fe3O4 in red mud and the reduction of partial Ti4+ to Ti3+ in TiO2 via the facile sol-gel method and H2 reduction treatment. The obtained low-cost BRM/BTiO2 composites exhibit remarkable photocatalytic degradation toward rhodamine B (91.2%) and tetracycline (83.6%) under visible light irradiation, much better than pristine TiO2. This enhancement is attributed to the narrow bandgap with the desired solar-light excitation, the black color with good solar-light absorption, and the heterojunctions with the efficient separation of photogenerated electron-hole pairs. Moreover, the desired magnetic separation of BRM/BTiO2 composites realizes the recycle and recovery of photocatalysts, favoring practical applications in environment. This work provides a cost-efficiency way to prepare RM-supported TiO2 composites for treating organic pollutants in the wastewater, which is of great significance to the comprehensive utilization of RM waste, the cost saving of the photocatalyst, and the visible-light active enhancement of TiO2.
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Affiliation(s)
- Xiaojie Song
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Ying Meng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Xin Zhou
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Kang Cheng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Yu Liang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Zhihong Yang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China.
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4
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Sun L, Yuan Y, He X, Zhan W, Li D, Zhao Y, Wang XJ, Han X. Hollow anatase TiO 2 tetrakaidecahedral crystals with an active {001}/{110} redox interface toward high-performance photocatalytic activity. Chem Sci 2024; 15:692-700. [PMID: 38179522 PMCID: PMC10762932 DOI: 10.1039/d3sc04328b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/03/2023] [Indexed: 01/06/2024] Open
Abstract
The existence of the oxidation/reduction interface can promote the performance of a photocatalyst, due to its effect on the separation of photogenerated carriers and the surface reactivity. However, it is difficult to construct two sets of oxidation/reduction interfaces in a single crystal and compare their separation efficiency for photogenerated carriers. Introducing a high proportion of active facets into the co-exposed facets is even more challenging. Herein, a hollow anatase TiO2 tetrakaidecahedron (HTT) with two sets of oxidation/reduction interfaces ({001}/{101} and {001}/{110}) is synthesized by directional chemical etching. Theoretical and experimental results indicate that the {001}/{110} interface is a dominant oxidation/reduction interface, showing a better promotion on the separation of photogenerated carriers than the {001}/{101} interface. In the HTT, the ratio of dominant {001}/(110) is increased and the proportion of the active {110} facet is about 40% (generally about 15%). Therefore, the HTT shows excellent catalytic activity for photocatalytic reductive (hydrogen production) and oxidative (selective oxidation of sulfides) reactions. The HTT also demonstrates favorable photocatalytic activity for the cross-dehydrogenative coupling reaction, where both photogenerated electrons and photogenerated holes are involved, further verifying its high separation efficiency of photogenerated carriers and surface reactivity. This work provides an important guideline for developing advanced structures with a predetermined interface toward desired applications.
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Affiliation(s)
- Liming Sun
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Yaya Yuan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Xiaoxiao He
- State Key Laboratory of Precision Spectroscopy, East China Normal University Shanghai 200241 P. R. China
| | - Wenwen Zhan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Dong Li
- State Key Laboratory of Precision Spectroscopy, East China Normal University Shanghai 200241 P. R. China
| | - Yanli Zhao
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Xiao-Jun Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Xiguang Han
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University Xuzhou 221116 P. R. China
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5
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Li M, Zhang R, Zou Z, Zhang L, Ma H. Optimizing physico-chemical properties of hierarchical ZnO/TiO 2 nano-film by the novel heating method for photocatalytic degradation of antibiotics and dye. CHEMOSPHERE 2024; 346:140392. [PMID: 37852380 DOI: 10.1016/j.chemosphere.2023.140392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/17/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023]
Abstract
The design of semiconductor catalysts with excellent photocatalytic properties, stability, recyclability, and good separation for the treatment of polluted water is still challenging. In this paper, the ZnO/TiO2 nano-thin films were fabricated using the magnetron sputtering technique and then heating the underlying ZnO layer and the upper TiO2 layer for their respective optimal heating time, i. e. heating ZnO for 3 h and heating TiO2 for 2 h. The as-prepared films were characterized. The results show that the preferred growth of TiO2 grains along the [001] axis, relatively large specific surface area, and increased amounts of surface oxygen vacancies (OVs) were induced to the heterojunction catalysts through this optimized heating strategy, which boosts the photocatalytic activity of ZnO/TiO2 nano-film. The degradation experiment inndicates that the ciprofloxacin (CIP) removal efficiency can reach 97.3% in 2 h duration, which was higher than that of the samples annealed for the same periods. Meanwhile, the prepared ZnO/TiO2 photocatalytic film exhibited favorable stability of 95.5% degradation efficiency after the fourth run and general applicability for the photodegradation of various contantains, whih removed 99.5% of ofloxacin (OFX) and 77.6% of tetracycline (TC) in 2 h and 94.1% of Rhodamine B (RhB) in 1 h. This work is expected to yields a novel insight into the production of heterojunction photocatalysts with excellen ability for photocatalytic degradation of pollutants in the practical industry.
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Affiliation(s)
- Min Li
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China
| | - Ruiyang Zhang
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China
| | - Zhipeng Zou
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China
| | - Lan Zhang
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China.
| | - Huizhong Ma
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China.
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6
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Wang L, Mai Y, Li S, Shu L, Fang J. Efficient inactivation of amoeba spores and their intraspore bacteria by solar/chlorine: Kinetics and mechanisms. WATER RESEARCH 2023; 242:120288. [PMID: 37419027 DOI: 10.1016/j.watres.2023.120288] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/21/2023] [Accepted: 06/28/2023] [Indexed: 07/09/2023]
Abstract
Amoebae are widespread in water and serve as environment vectors for pathogens, which may threaten public health. This study evaluated the inactivation of amoeba spores and their intraspore bacteria by solar/chlorine. Dictyostelium discoideum and Burkholderia agricolaris B1qs70 were selected as model amoebae and intraspore bacteria, respectively. Compared to solar irradiation and chlorine, solar/chlorine enhanced the inactivation of amoeba spores and intraspore bacteria, with 5.1 and 5.2-log reduction at 20 min, respectively. The enhancement was similar in real drinking water by solar/chlorine under natural sunlight. However, the spore inactivation decreased to 2.97-log by 20 min solar/chlorine under oxygen-free condition, indicating that ozone played a crucial role in the spore inactivation, as also confirmed by the scavenging test using tert‑butanol to scavenge the ground-state atomic oxygen (O(3P)) as a ozone precursor. Moreover, solar/chlorine induced the shape destruction and structural collapse of amoeba spores by scanning electron microscopy. As for intraspore bacteria, their inactivation was likely ascribed to endogenous reactive oxygen species. As pH increased from 5.0 to 9.0, the inactivation of amoeba spores decreased, whereas that of intraspore bacteria was similar at pH 5.0 and 6.5 during solar/chlorine treatment. This study first reports the efficient inactivation of amoeba spores and their intraspore pathogenic bacteria by solar/chlorine in drinking water.
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Affiliation(s)
- Liping Wang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275 China
| | - Yingwen Mai
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275 China
| | - Shenzhou Li
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275 China
| | - Longfei Shu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275 China.
| | - Jingyun Fang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275 China.
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Wang N, Li Y, Wang L, Yu X. Photocatalytic Applications of ReS2-Based Heterostructures. Molecules 2023; 28:molecules28062627. [PMID: 36985599 PMCID: PMC10051642 DOI: 10.3390/molecules28062627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/10/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
ReS2-based heterostructures, which involve the coupling of a narrow band-gap semiconductor ReS2 with other wide band-gap semiconductors, have shown promising performance in energy conversion and environmental pollution protection in recent years. This review focuses on the preparation methods, encompassing hydrothermal, chemical vapor deposition, and exfoliation techniques, as well as achievements in correlated applications of ReS2-based heterostructures, including type-I, type-II heterostructures, and Z-scheme heterostructures for hydrogen evolution, reduction of CO2, and degradation of pollutants. We believe that this review provides an overview of the most recent advances to guide further research and development of ReS2-based heterostructures for photocatalysis.
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8
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Querebillo CJ. A Review on Nano Ti-Based Oxides for Dark and Photocatalysis: From Photoinduced Processes to Bioimplant Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:982. [PMID: 36985872 PMCID: PMC10058723 DOI: 10.3390/nano13060982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/13/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Catalysis on TiO2 nanomaterials in the presence of H2O and oxygen plays a crucial role in the advancement of many different fields, such as clean energy technologies, catalysis, disinfection, and bioimplants. Photocatalysis on TiO2 nanomaterials is well-established and has advanced in the last decades in terms of the understanding of its underlying principles and improvement of its efficiency. Meanwhile, the increasing complexity of modern scientific challenges in disinfection and bioimplants requires a profound mechanistic understanding of both residual and dark catalysis. Here, an overview of the progress made in TiO2 catalysis is given both in the presence and absence of light. It begins with the mechanisms involving reactive oxygen species (ROS) in TiO2 photocatalysis. This is followed by improvements in their photocatalytic efficiency due to their nanomorphology and states by enhancing charge separation and increasing light harvesting. A subsection on black TiO2 nanomaterials and their interesting properties and physics is also included. Progress in residual catalysis and dark catalysis on TiO2 are then presented. Safety, microbicidal effect, and studies on Ti-oxides for bioimplants are also presented. Finally, conclusions and future perspectives in light of disinfection and bioimplant application are given.
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Affiliation(s)
- Christine Joy Querebillo
- Leibniz-Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstr. 20, 01069 Dresden, Germany
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9
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Derakhshani M, Amini MM. Phase control and induction of visible-light photocatalytic activity in hierarchical porous structure nanocrystalline TiO2 prepared using a MOF-5-derived nanoporous carbon template. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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10
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Ikram M, Haider A, Imran M, Haider J, Ul-Hamid A, Shahzadi A, Malik R, Kashaf-Ul-Ain, Nabgan W, Nazir G, Ali S. Graphitic-C 3N 4/chitosan-doped NiO nanostructure to treat the polluted water and their bactericidal with in silico molecular docking analysis. Int J Biol Macromol 2023; 227:962-973. [PMID: 36460247 DOI: 10.1016/j.ijbiomac.2022.11.273] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/26/2022] [Accepted: 11/26/2022] [Indexed: 11/30/2022]
Abstract
Different concentrations (2 and 4 wt%) of graphite carbon nitride (g-C3N4) was doped into fixed amount of chitosan (CS) and nickel oxide (NiO) nanoparticles (NPs) via a co-precipitation route. The aim of study is to remove the pollutants from wastewater through catalytic activity (CA) and determine the bactericidal activities of synthesized products. X-ray diffraction pattern confirmed the cubic structure of NiO NPs and peak shifted to higher angle upon g-C3N4 doping. Fourier transform infrared spectroscopy revealed the existence of bending and stretching vibration mode. The absorption decreased gradually accompanied blue-shift and assessed bandgap energy increased upon doping. The high resolution transmission electron microscopy micrographs confirmed the formation of cubic-shaped NPs and elongated nanorods were seen for NiO and co-doped NiO. The catalytic efficiency of samples was examined using methylene blue (MB) in the presence of reducing agent. A remarkable dye de-colorization was confirmed with a g-C3N4 and CS doping; moreover, the bactericidal efficacy compared to Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was observed as 3.15 and 13.8 mm, respectively. In silico, molecular docking investigations targeting against b-lactamaseS. aureus and FabHE. coli enzymes assisted to elaborate the mechanism underlying microbicidal action of the NPs.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, 54000, Pakistan.
| | - Ali Haider
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan 66000, Pakistan
| | - Muhammad Imran
- Department of Chemistry, Government College University Faisalabad, Pakpattan Road, Sahiwal, Punjab 57000, Pakistan
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Anum Shahzadi
- Faculty of Pharmacy, The University of Lahore, Lahore 54000, Pakistan
| | - Rumaisa Malik
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Kashaf-Ul-Ain
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Walid Nabgan
- Departament d'Enginyeria Química, Universitat Rovira i Virgili, Av Països Catalans 26, 43007 Tarragona, Spain.
| | - Ghazanfar Nazir
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
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Liao L, Wang M, Li Z, Wang X, Zhou W. Recent Advances in Black TiO 2 Nanomaterials for Solar Energy Conversion. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:468. [PMID: 36770430 PMCID: PMC9921477 DOI: 10.3390/nano13030468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/16/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Titanium dioxide (TiO2) nanomaterials have been widely used in photocatalytic energy conversion and environmental remediation due to their advantages of low cost, chemical stability, and relatively high photo-activity. However, applications of TiO2 have been restricted in the ultraviolet range because of the wide band gap. Broadening the light absorption of TiO2 nanomaterials is an efficient way to improve the photocatalytic activity. Thus, black TiO2 with extended light response range in the visible light and even near infrared light has been extensively exploited as efficient photocatalysts in the last decade. This review represents an attempt to conclude the recent developments in black TiO2 nanomaterials synthesized by modified treatment, which presented different structure, morphological features, reduced band gap, and enhanced solar energy harvesting efficiency. Special emphasis has been given to the newly developed synthetic methods, porous black TiO2, and the approaches for further improving the photocatalytic activity of black TiO2. Various black TiO2, doped black TiO2, metal-loaded black TiO2 and black TiO2 heterojunction photocatalysts, and their photocatalytic applications and mechanisms in the field of energy and environment are summarized in this review, to provide useful insights and new ideas in the related field.
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12
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Zakaria H, Li Y, Fathy MM, Zhou X, Xiong X, Wang Y, Rong S, Zhang C. A novel TiO 2-x/TiN@ACB composite for synchronous photocatalytic Cr(VI) reduction and water photothermal evaporation under visible/infrared light illumination. CHEMOSPHERE 2023; 311:137137. [PMID: 36351469 DOI: 10.1016/j.chemosphere.2022.137137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 10/17/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
Relatively large band-gap, fast charge carriers recombination, and mono-functionality of photocatalytic materials are still representing stumbling hurdles against their optimal usage for water cleaning. Herein, a novel black titanium oxide/plasmonic titanium nitride@activated coconut biochar (TiO2-x/TiN@ACB) composite was designed to have both photocatalytic and photothermal functions. Intermediate states of black TiO2-x, plasmonic effect of TiN, and high electrons (e-) capacity of biochar enhanced band-gap narrowing, light absorbance extension, and charge carriers separation respectively. Black TiO2-x and plasmonic TiN sensitization via visible/infrared (Vis/IR) portion of photonic spectrum in addition to the confirmed close contact of composite constituents explained the demonstrated major role of e- in photocatalytic mechanism through efficient excitation and facile transfer. Thanks to black photocatalytic semiconductor and carbonic materials for their ultimate photons harnessing and efficient photothermal conversion where the composite exhibited a remarkable photothermal water evaporation upon Vis/IR illumination as well. TiO2-x/TiN@ACB composite revealed 92.8 and 89.7% photocatalytic reduction of hexavalent chromium (Cr(VI)) and water evaporation efficiencies up to 92.9 and 51.1% upon IR and Vis light illumination respectively. This study proposes a new approach for efficient water cleaning by coupling of oxygen deficient and plasmonic semiconductors supported on naturally derived carbonic material as a broad spectrum harvester and bi-functional photocatalytic and photothermal material.
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Affiliation(s)
- Hossam Zakaria
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China; The Egyptian Chinese University (ECU), Cairo, Egypt
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.
| | - Mohamed M Fathy
- Department of Biophysics, Faculty of Science, Cairo University, Giza, Egypt
| | - Xinyi Zhou
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Xinyan Xiong
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Ye Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Shengxiang Rong
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China
| | - Chi Zhang
- College of Mechanics and Materials, Hohai University, Xikang Road #1, Nanjing, 210098, PR China.
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13
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Brillas E, Manuel Peralta-Hernández J. Removal of paracetamol (acetaminophen) by photocatalysis and photoelectrocatalysis. A critical review. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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14
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Electronic Structure, Optical and Magnetic Properties of Oxygen-Deficient Gray TiO2–δ(B). INORGANICS 2022. [DOI: 10.3390/inorganics10110184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The gray-colored oxygen-deficient TiO2–δ(B) nanobelts have been synthesized through a combination of the hydrothermal method followed by an ion exchange process and vacuum annealing. Electron paramagnetic resonance reveals an existence of F-centers in the form of electron-trapped oxygen vacancies within the anionic sublattice of the gray bronze TiO2 that induces its colouration. The diffuse reflectance spectroscopy showed that the formation of oxygen vacancies into TiO2(B) significantly increases its absorption intensity in both visible and near infrared ranges. The band gap of TiO2(B) with anionic defects is equal to 3.03 eV (against 3.24 eV for white TiO2(B) treated in air). Room temperature ferromagnetism associated with the defects was detected in gray TiO2–δ(B), thus indicating it belongs it to the class of dilute magnetic oxide semiconductors. It was found that in the low-temperature range (4 K), the magnetic properties of vacuum annealed TiO2(B) do not differ from those for TiO2(B) treated in air. We hope that the findings are defined here make a contribution to further progress in fabrication and manufacturing of defective TiO2-based nanomaterials for catalysis, magnetic applications, batteries, etc.
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15
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Aluminium foil-assisted NaBH4 reduced TiO2 with surface defects for photocatalytic degradation of toxic fuchsin basic dye. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02628-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Jiao H, Sun G, Wang Y, Zhang Z, Wang Z, Wang H, Li H, Feng M. Defective TiO2 hollow nanospheres as photo-electrocatalysts for photo-assisted Li-O2 batteries. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.11.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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17
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Visible-Light-Active Black TiO 2 Nanoparticles with Efficient Photocatalytic Performance for Degradation of Pharmaceuticals. NANOMATERIALS 2022; 12:nano12152563. [PMID: 35893534 PMCID: PMC9330099 DOI: 10.3390/nano12152563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 07/22/2022] [Accepted: 07/24/2022] [Indexed: 11/16/2022]
Abstract
Special attention has recently been paid to surface-defective titanium dioxide and black TiO2 with advanced optical, electrical, and photocatalytic properties. Synthesis of these materials for photodegradation and mineralization of persistent organic pollutants in water, especially under visible radiation, presents interest from scientific and application points of view. Chemical reduction by heating a TiO2 and NaBH4 mixture at 350 °C successfully introduced Ti3+ defects and oxygen vacancies at the surface of TiO2, with an increase in the photocatalytic degradation of amoxicillin—an antibiotic that is present in wastewater due to its intense use in human and animal medicine. Three TiO2 samples were prepared at different annealing temperatures to control the ratio between anatase and rutile and were subjected to chemical reduction. Electron paramagnetic resonance investigations showed that the formation of surface Ti3+ defects in a high concentration occurred mainly in the anatase sample annealed at 400 °C, contributing to the bandgap reduction from 3.32 eV to 2.92 eV. The reduced band gap enhances visible light absorption and the efficiency of photocatalysis. The nanoparticles of ~90 m2/g specific surface area and 12 nm average size exhibit ~100% efficiency in the degradation of amoxicillin under simulated solar irradiation compared with pristine TiO2. Mineralization of amoxicillin and by-products was over 75% after 48 h irradiation for the anatase sample, where the Ti3+ defects were present in a higher concentration at the catalyst’s surface.
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Chen X, Sun B, Chu J, Han Z, Wang Y, Du Y, Han X, Xu P. Oxygen Vacancy-Induced Construction of CoO/h-TiO 2 Z-Scheme Heterostructures for Enhanced Photocatalytic Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2022; 14:28945-28955. [PMID: 35723439 DOI: 10.1021/acsami.2c06622] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Environmentally friendly catalysts with excellent performance and low cost are critical for photocatalysis. Herein, using hydrogenated TiO2 (h-TiO2) nanosheets with enriched oxygen vacancies as the support, two-dimensional CoO/h-TiO2 Z-scheme heterostructures are fabricated for hydrogen production through photocatalytic water splitting. It is revealed that the oxygen vacancies in h-TiO2 can inhibit the oxidation of Co2+ into high-valence Co3+ during the hydrothermal reaction and thermal treatment processes. A CoO/h-TiO2 Z-scheme heterostructure possesses a space charge region and a built-in electric field at the interface, and oxygen vacancies in h-TiO2 can provide more reactive sites, which synergistically improve the separation and transportation of photogenerated carriers. As a result, the photocatalytic hydrogen evolution rate achieves 129.75 μmol·h-1 (with 50 mg of photocatalysts) on the optimized CoO/h-TiO2 heterostructures. This work provides a new design idea for the preparation of excellent TiO2-based photocatalysts.
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Affiliation(s)
- Xiaoyu Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Bojing Sun
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jiayu Chu
- School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
| | - Zhi Han
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yu Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yunchen Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xijiang Han
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Ping Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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19
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Bi@H-TiO2/B-C3N4 heterostructure for enhanced photocatalytic hydrogen generation activity under visible light. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.04.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Homocianu M, Pascariu P. High-performance photocatalytic membranes for water purification in relation to environmental and operational parameters. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 311:114817. [PMID: 35276562 DOI: 10.1016/j.jenvman.2022.114817] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 02/16/2022] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Growing technologies, increasing population and environmental pollution lead to severe contamination of water and require advanced water treatment technologies. These aspects lead to the need to purify water with advanced smart materials. This paper reviews the recent advances (during the last 5 years) in photocatalytic composite membranes used for water treatment. For this purpose, the authors have reviewed the main materials used in the development of (photocatalytic membranes) PMs, environmental and operational factors affecting the performance of photocatalytic membranes, and the latest developments and applications of PMs in water purifications. The composite photocatalytic membranes show good performance in the removal and degradation of pollutants from water.
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Affiliation(s)
- Mihaela Homocianu
- "Petru Poni" Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487, Iasi, Romania
| | - Petronela Pascariu
- "Petru Poni" Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487, Iasi, Romania.
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21
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Versatile PVA/CS/CuO aerogel with superior hydrophilic and mechanical properties towards efficient solar steam generation. NANO SELECT 2021. [DOI: 10.1002/nano.202100125] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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22
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Defective Black TiO 2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities. NANOMATERIALS 2021; 11:nano11102648. [PMID: 34685089 PMCID: PMC8541354 DOI: 10.3390/nano11102648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/16/2022]
Abstract
A series of black TiO2 with and without the addition of urea were successfully prepared using a simple one-step synthetic method by calcination under different atmospheres (vacuum, He, or N2). The physicochemical, optical, and light-induced charge transfer properties of the as-prepared samples were characterized by various techniques. It was found that a vacuum atmosphere was more beneficial for the formation of oxygen vacancies (OVs) than the inert gases (He and N2) and the addition of urea-inhibited OVs formation. The samples annealed in the vacuum condition exhibited better visible-light adsorption abilities, narrower bandgaps, higher photo-induced charge separation efficiency, and lower recombination rates. Hydroxyl radicals (·OH) were the dominant oxidative species in the samples annealed under a vacuum. Finally, the samples annealed under vacuum conditions displayed higher photocatalytic activity for methylene blue (MB) degradation than the samples annealed under He or N2. Based on the above, this study provides new insights into the effects of annealing atmospheres and urea addition on the properties of black TiO2.
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23
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Chiappara C, Arrabito G, Ferrara V, Scopelliti M, Sancataldo G, Vetri V, Chillura Martino DF, Pignataro B. Improved Photocatalytic Activity of Polysiloxane TiO 2 Composites by Thermally Induced Nanoparticle Bulk Clustering and Dye Adsorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10354-10365. [PMID: 34461725 PMCID: PMC8413002 DOI: 10.1021/acs.langmuir.1c01475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/27/2021] [Indexed: 05/24/2023]
Abstract
Fine control of nanoparticle clustering within polymeric matrices can be tuned to enhance the physicochemical properties of the resulting composites, which are governed by the interplay of nanoparticle surface segregation and bulk clustering. To this aim, out-of-equilibrium strategies can be leveraged to program the multiscale organization of such systems. Here, we present experimental results indicating that bulk assembly of highly photoactive clusters of titanium dioxide nanoparticles within an in situ synthesized polysiloxane matrix can be thermally tuned. Remarkably, the controlled nanoparticle clustering results in improved degradation photocatalytic performances of the material under 1 sun toward methylene blue. The resulting coatings, in particular the 35 wt % TiO2-loaded composites, show a photocatalytic degradation of about 80%, which was comparable to the equivalent amount of bare TiO2 and two-fold higher with respect to the corresponding composites not subjected to thermal treatment. These findings highlight the role of thermally induced bulk clustering in enhancing photoactive nanoparticle/polymer composite properties.
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Affiliation(s)
- Clara Chiappara
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
- National
Interuniversity Consortium of Materials Science and Technology (INSTM),
UdR of Palermo, Florence 50121, Italy
| | - Giuseppe Arrabito
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
| | - Vittorio Ferrara
- National
Interuniversity Consortium of Materials Science and Technology (INSTM),
UdR of Palermo, Florence 50121, Italy
- Department
of Biological, Chemical and Pharmaceutical Sciences and Technologies
(STEBICEF), University of Palermo, Building 16, V.le delle Scienze, Palermo 90128, Italy
| | - Michelangelo Scopelliti
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
| | - Giuseppe Sancataldo
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
| | - Valeria Vetri
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
| | - Delia Francesca Chillura Martino
- National
Interuniversity Consortium of Materials Science and Technology (INSTM),
UdR of Palermo, Florence 50121, Italy
- Department
of Biological, Chemical and Pharmaceutical Sciences and Technologies
(STEBICEF), University of Palermo, Building 16, V.le delle Scienze, Palermo 90128, Italy
| | - Bruno Pignataro
- Department
of Physics and Chemistry (DiFC) Emilio Segrè, University of Palermo, Building 17, V.le delle Scienze, Palermo 90128, Italy
- National
Interuniversity Consortium of Materials Science and Technology (INSTM),
UdR of Palermo, Florence 50121, Italy
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24
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Abstract
Pristine and modified/doped titania are still some of the most widely investigated photocatalysts due to its high activity, stability, abundance and proper redox properties to carry out various reactions. However, modifiers and/or dopants resulting in visible-light activity might be expensive or work as recombination centers under UV irradiation. It seems that defective titania, known as “self-doped” TiO2, might be the best solution since it can be obtained under mild conditions without the addition of expensive materials and methods. This review discusses various methods of defective titania preparation, characterization of defect types, their localization (surface vs. bulk) and their function, as well as proposed mechanisms of photocatalytic reactions in the presence of self-doped titania. Although many kinds of defective titania samples have already been prepared with different colors, color intensities and defect kinds (mainly Ti3+ and oxygen vacancies), it is difficult to conclude which of them are the most recommended as the preparation conditions and activity testing used by authors differ. Furthermore, activity testing under solar radiation and for dyes does not clarify the mechanism since bare titania can also be excited and sensitized, respectively, in these conditions. In many reports, authors have not considered the possible influence of some impurities originated from the synthesis method (e.g., H, Al, Zn, Cl, F) that could co-participate in the overall mechanism of photocatalytic reactions. Moreover, some reports indicate that defective titania, especially black ones, might decrease activity since the defects might work as recombination centers. Despite some unproven/unclear findings and unanswered questions, there are many well-conducted studies confirmed by both experimental and theoretical studies that defective titania might be a promising material for various photocatalytic reactions under both UV and visible-light irradiation. Based on available literature, it could be proposed that optimal defects’ concentration, the preferential role of surface defects, a higher surface-to-bulk ratio of defects in rutile than in anatase, and the beneficial impact of disordered surface are the most important aspects to be considered during the preparation of defective titania.
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25
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Zhao J, Li Y, Na P. Facile Construction of Carbon Dots Layer and Oxygen Vacancies Simultaneously onto
TiO2
to Enhance Photoreduction Activity. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jingyu Zhao
- School of Chemical Engineering and Technology, Tianjin University Tianjin 300354 China
| | - Yaru Li
- School of Chemical Engineering and Technology, Tianjin University Tianjin 300354 China
| | - Ping Na
- School of Chemical Engineering and Technology, Tianjin University Tianjin 300354 China
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26
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Bao E, Long S, Zhang S, Li H, Zhang W, Zou J, Xu Q. A Ternary Photocatalyst with Double Heterojunctionsfor Efficient Diesel Oil Degradation. ChemistrySelect 2021. [DOI: 10.1002/slct.202004782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Er‐Peng Bao
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
| | - Songtao Long
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
| | - Shuoqing Zhang
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
| | - Huan Li
- School of Chemical Engineering and Advanced Materials The University of Adelaide Adelaide SA 5005 Australia
| | - Weiguo Zhang
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
| | - Jijun Zou
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
| | - Qiang Xu
- School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P R China
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27
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Katal R, Masudy-Panah S, Sabbaghan M, Hossaini Z, Davood Abadi Farahani MH. Photocatalytic degradation of triclosan by oxygen defected CuO thin film. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117239] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Raufeisen S, Neumeister P, Buchheim JR, Stelter M, Braeutigam P. Pyrocatalytic oxidation - strong size-dependent poling effect on catalytic activity of pyroelectric BaTiO 3 nano- and microparticles. Phys Chem Chem Phys 2020; 22:23464-23473. [PMID: 32960200 DOI: 10.1039/d0cp03158e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrocatalysis is an emerging advanced oxidation process for wastewater remediation with the potential for thermal energy harvesting and utilization. Although several studies explored the potential of new pyrocatalyst materials to degrade harmful organic water pollutants, the role of important material properties and electric poling procedures on the pyrocatalytic activity is still unclear. In this work, we investigate the interdependence between particle size, electric poling and pyrocatalytic activity of BaTiO3 powders with nominal particle sizes of 100, 200 and 500 nm by using the dichlorofluorescein redox assay. Depending on the particle size, the influence of surface area or phase composition on the pyrocatalytic activity predominates. Moreover, we demonstrate that poling of pyrocatalysts leads to a strong size-dependent increase of pyrocatalytic activity. This poling effect increases with particle size up to +247% and can be explained with size-dependent changes in phase composition and domain structure. Combining all results, the progression of the pyrocatalytic activity as a function of particle size was derived and a future strategy for maximizing the catalytic performance of pyrocatalysts was developed. This study greatly improves the understanding about the role of important material properties and electric poling on pyrocatalytic activity, thus enabling an effective catalyst design. With the help of highly active catalysts, the pyrocatalytic process can take the next step in its development into a new and energy-efficient advanced oxidation process for water remediation.
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Affiliation(s)
- Sascha Raufeisen
- Institute of Technical Chemistry and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany. and Center for Energy and Environmental Chemistry (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Peter Neumeister
- Fraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems, Winterbergstraße 28, 01277 Dresden, Germany
| | - Johannes R Buchheim
- Institute of Technical Chemistry and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany. and Center for Energy and Environmental Chemistry (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Michael Stelter
- Institute of Technical Chemistry and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany. and Center for Energy and Environmental Chemistry (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany and Fraunhofer IKTS, Fraunhofer Institute for Ceramic Technologies and Systems, Michael-Faraday-Straße 1, 07629 Hermsdorf, Germany
| | - Patrick Braeutigam
- Institute of Technical Chemistry and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany. and Center for Energy and Environmental Chemistry (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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29
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Liu N, Zhu M, Niu N, Ren J, Yang N, Yu C. Aza-BODIPY Probe-Decorated Mesoporous Black TiO 2 Nanoplatform for the Highly Efficient Synergistic Phototherapy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:41071-41078. [PMID: 32806896 DOI: 10.1021/acsami.0c10531] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
As an important noninvasive tumor treatment method, phototherapy has drawn extensive research interest. However, the requirements of separate excitation wavelengths, high degree of electron-hole recombination, and low reactive oxygen species (ROS) production capability are still the major barriers. This work reports the construction of a novel nanoplatform: design and synthesis of an aza-BODIPY (AB) probe-decorated mesoporous black titanium dioxide (TiO2) (MT) nanoparticles (NPs) for enhanced photodynamic therapy and photothermal therapy under single-wavelength near-infrared (NIR) laser irradiation for the first time. AB probe-decorated MT NPs (abbreviated as MTAB) were synthesized through the Al reduction of mesoporous anatase TiO2 NPs and subsequent adsorption of the AB probe. The mesoporous structure of MT ensured AB loading capacity and avoided the complicated modification and synthesis processes. Heterogeneous MTAB, which possessed staggered energy levels, were assessed for their capability for effective separation of photogenerated electrons and holes for the first time. Upon NIR laser light irradiation, MTAB exhibited sufficient ROS generation, resulting in distinct tumor cell killing and tumor tissue elimination. This unique heterogeneous nanoplatform with staggered energy levels provides a new strategy to enhance ROS generation and improve the therapeutic efficacy.
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Affiliation(s)
- Ning Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
| | - Ming Zhu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
| | - Niu Niu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
- University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jia Ren
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
- University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Na Yang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
| | - Cong Yu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 China
- University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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30
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Wang W, Lin F, Yan B, Cheng Z, Chen G, Kuang M, Yang C, Hou L. The role of seashell wastes in TiO 2/Seashell composites: Photocatalytic degradation of methylene blue dye under sunlight. ENVIRONMENTAL RESEARCH 2020; 188:109831. [PMID: 32798949 DOI: 10.1016/j.envres.2020.109831] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
This paper proposes a sustainable and facile approach for the synthesis of photocatalysts in which shell waste is used as support material. The synthesized photocatalysts exhibited a significant performance in the mineralization of organic substances under solar irradiation or artificial lighting. Calcined abalone shell with a TiO2 loading of 23.4% led to a significant improvement in optical absorption: the degradation efficiencies of methylene blue (MB) after 140 min under UV light, vis light, UV-vis light, and natural sunlight were 93%, 96%, 100%, and 100%, respectively. Notably, the byproducts obtained after the degradation by commercial P25 TiO2 disappeared with the utilization of shell waste as support material. The Na, Sr, S present in the calcined abalone shell were doped into the substitutional sites of TiO2 and were indispensable to achieve the desired band-gap narrowing and photocatalytic performance; moreover, the Ti and Zn oxides in the calcined abalone shell acted as semiconductors and improved the charge separation efficiency of TiO2. Above all, this paper describes a green synthesis based on the use of waste seashell. This material acts as an excellent photocatalyst support for environmental pollution treatments, leading to the 'control of waste by waste' and opening up new possibilities for shell waste reutilization and sustainable chemistry.
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Affiliation(s)
- Wenjun Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Fawei Lin
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China.
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Zhanjun Cheng
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Guanyi Chen
- School of Science, Tibet University, Lhasa, 850012, China
| | - Meng Kuang
- State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing, 100024, PR China
| | - Chao Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China
| | - Lian Hou
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, PR China; Xi'an High-Tech Institute, Xi'an, 710025, China.
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Ikram M, Umar E, Raza A, Haider A, Naz S, Ul-Hamid A, Haider J, Shahzadi I, Hassan J, Ali S. Dye degradation performance, bactericidal behavior and molecular docking analysis of Cu-doped TiO 2 nanoparticles. RSC Adv 2020; 10:24215-24233. [PMID: 35516171 PMCID: PMC9055104 DOI: 10.1039/d0ra04851h] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 06/18/2020] [Indexed: 11/21/2022] Open
Abstract
Copper-doped TiO2 was prepared with a sol-gel chemical method. Various concentrations (3, 6, and 9 wt%) of Cu dopant were employed. Several techniques were implemented to assess the structural, optical, morphological and chemical properties of the synthesized samples. Evaluation of elemental composition using SEM-EDS and XRF techniques showed the presence of dopant element in the prepared samples. XRD analysis confirmed the presence of anatase (TiO2) phase with interstitial doping. Incorporation of dopant was observed to enhance the crystallinity and increase the crystallite size of the synthesized products. SAED profiles revealed a high degree of crystallinity in the prepared specimens, which was also evident in the XRD spectra. Optical properties studied using UV-vis spectroscopy depicted a shift of the maximum absorption to the visible region (redshift) that signified a reduction in the band gap energy of Cu-doped TiO2 samples. Examination of morphological features with scanning and high-resolution transmission electron microscopes revealed the formation of spherical nanoparticles with a tendency to agglomerate with increasing dopant concentration. Molecular vibrations and the formation of Ti-O-Ti bonds were revealed through FTIR spectra. PL spectroscopy recorded the trapping efficiency and migration of charge carriers, which exhibited electron-hole recombination behavior. Doped nanostructures showed enhanced bactericidal performance and synergism against S. aureus and E. coli. In summary, Cu-doped TiO2 nanostructures were observed to impede bacteria effectively, which is deemed beneficial in overcoming ailments caused by pathogens such as microbial etiologies. Furthermore, molecular docking analysis was conducted to study the interaction of Cu-doped TiO2 nanoparticles with multiple proteins namely β-lactamase (binding score: -4.91 kcal mol-1), ddlB (binding score: -5.67 kcal mol-1) and FabI (binding score: -6.13 kcal mol-1) as possible targets with active site residues. Dye degradation/reduction of control and Cu-doped samples were studied through absorption spectroscopy. The obtained outcomes of the performed experiment indicated that the photocatalytic activity of Cu-TiO2 enhanced with increasing dopant concentration, which is thought to be due to a decreased rate of electron-hole pair recombination. Consequently, it is suggested that Cu-TiO2 can be exploited as an effective candidate for antibacterial and dye degradation applications.
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Affiliation(s)
- M Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore Punjab 54000 Pakistan +923005406667
| | - E Umar
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - A Raza
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - A Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences Lahore 54000 Punjab Pakistan
| | - S Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - A Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
| | - J Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences Tianjin 300308 China
| | - I Shahzadi
- College of Pharmacy, University of the Punjab Lahore 54000 Pakistan
| | - J Hassan
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
| | - S Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University 14 Ali Road Lahore Pakistan
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Bui VKH, Tran VV, Moon JY, Park D, Lee YC. Titanium Dioxide Microscale and Macroscale Structures: A Mini-Review. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1190. [PMID: 32570846 PMCID: PMC7353431 DOI: 10.3390/nano10061190] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 11/17/2022]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) have some limitations, such as their low surface area, high bandgap energy, and low recycling ability. To overcome these limitations, TiO2 can be prepared in microscale/macroscale structures. TiO2 microscale structures, in comparison with TiO2 nanopowder, have higher surface areas, more tunable pore structures, and better top photocatalytic activity. In contrast, for TiO2 macroscale structures, although the surface area is lower than TiO2 nanopowder in many cases, they still achieve similar or better photocatalytic performance due to their unique properties. Moreover, both TiO2 microscale and macroscale structures can be easily recovered from reaction media. The difference between these two types of TiO2 structures is a function not only of size but also of the preparation process. Every type of TiO2 structure has its own advantages and disadvantages, as will be discussed further in the following pages. Future perspectives on this research field also will be discussed.
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Affiliation(s)
- Vu Khac Hoang Bui
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (V.K.H.B.); (V.V.T.)
| | - Vinh Van Tran
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (V.K.H.B.); (V.V.T.)
| | - Ju-Young Moon
- Department of Beauty Design Management, Hansung University, 116 Samseongyoro-16gil, Seoul 02876, Korea;
| | - Duckshin Park
- Korea Railroad Research Institute (KRRI), 176 Cheoldobakmulkwan-ro, Uiwang-si, Gyeonggi-do 16105, Korea
| | - Young-Chul Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea; (V.K.H.B.); (V.V.T.)
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Li C, Sun W, Lu Z, Ao X, Li S. Ceramic nanocomposite membranes and membrane fouling: A review. WATER RESEARCH 2020; 175:115674. [PMID: 32200336 DOI: 10.1016/j.watres.2020.115674] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 02/10/2020] [Accepted: 02/27/2020] [Indexed: 05/26/2023]
Abstract
Membrane technologies have broad applications in the removal of contaminants from drinking water and wastewater. In recent decades, ceramic membrane has made rapid progress in industrial/municipal wastewater treatment and drinking water treatment owing to their advantageous properties over conventional polymeric membrane. The beneficial characteristics of ceramic membranes include fouling resistance, high permeability, good recoverability, chemical stability, and long life time, which have found applications with the recent innovations in both fabrication methods and nanotechnology. Therefore, ceramic membranes hold great promise for potential applications in water treatment. This paper mainly reviews the progress in the research and development of ceramic membranes, with key focus on porous ceramic membranes and nanomaterial-functionalized ceramic membranes for nanofiltration or catalysis. The current state of the available ceramic membranes in industry and academia, and their potential advantages, limitations and applications are reviewed. The last section of the review focuses on ceramic membrane fouling and the efforts towards ceramic membrane fouling mitigation. The advances in ceramic membrane technologies have rarely been widely reviewed before, therefore, this review could be served as a guide for the new entrants to the field, as well to the established researchers.
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Affiliation(s)
- Chen Li
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Wenjun Sun
- School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Zedong Lu
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xiuwei Ao
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Simiao Li
- School of Environment, Tsinghua University, Beijing, 100084, China
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34
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Black TiO2 Thin Films Production Using Hollow Cathode Hydrogen Plasma Treatment: Synthesis, Material Characteristics and Photocatalytic Activity. Catalysts 2020. [DOI: 10.3390/catal10030282] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Black TiO2 materials have been quite widely explored due to their large solar absorption and superior photocatalytic activity. In this paper, the blackening process of titanium dioxide (TiO2) thin film using the hollow cathode hydrogen plasma (HCHP) technique is reported. First, pristine anatase TiO2 films were grown by magnetron sputtering onto silicon and cover glass substrates and then annealed at 450 °C for 2 h. Then, the as-grown TiO2 films were treated with HCHP for 15 min. The physical, chemical and morphological properties of the films were analyzed by profilometry, X-ray diffraction (XRD), UV-Vis spectrophotometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) techniques. Electrical and photocatalytic measurements were performed by four-point probe and methylene blue UV degradation assays, respectively. The results showed that the black TiO2 film is highly absorbent in the UV-visible region, has low electrical resistance and greater surface area compared to the non-treated TiO2 film. These properties of black TiO2 film, as well as its performance as a photocatalytic agent, were investigated, indicating the superior quality of this material in thin film form and the promising potential of the HCHP treatment to produce hydrogenated TiO2 in short process time.
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35
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Patil SB, Phattepur H, Nagaraju G, Gowrishankar BS. Highly distorted mesoporous S/C/Ti 3+ doped black TiO 2 for simultaneous visible light degradation of multiple dyes. NEW J CHEM 2020. [DOI: 10.1039/d0nj01540g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
S–B-TiO2 exhibited 90 and 96% visible light simultaneous degradation of rose bengal and methylene blue dyes in 80 min, respectively.
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Affiliation(s)
- Shivaraj B. Patil
- Materials Research Laboratory
- Department of Chemistry
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - Harish Phattepur
- Department of Chemical Engineering
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - G. Nagaraju
- Materials Research Laboratory
- Department of Chemistry
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - B. S. Gowrishankar
- Department of Chemical Engineering
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
- Department of Biotechnology
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36
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Qian N, Zhang X, Wang M, Sun X, Sun X, Liu C, Rao R, Ma Y. Great enhancement in photocatalytic performance of (001)-TiO2 through N-doping via the vapor-thermal method. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112127] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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37
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Katal R, Davood Abadi Farahani MH, Jiangyong H. Degradation of acetaminophen in a photocatalytic (batch and continuous system) and photoelectrocatalytic process by application of faceted-TiO2. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115859] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Wang J, Shih Y, Wang PY, Yu YH, Su JF, Huang CP. Hazardous waste treatment technologies. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:1177-1198. [PMID: 31433896 DOI: 10.1002/wer.1213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 07/29/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
This is a review of the literature published in 2018 on topics related to hazardous waste management in water, soils, sediments, and air. The review covers treatment technologies applying physical, chemical, and biological principles for contaminated water, soils, sediments, and air. PRACTITIONER POINTS: The management of waters, wastewaters, and soils contaminated by various hazardous chemicals including inorganic (e.g., oxyanions, salts, and heavy metals), organic (e.g., halogenated, pharmaceuticals and personal care products, pesticides, and persistent organic chemicals) was reviewed according to the technology applied, namely, physical, chemical and biological methods. Physical methods for the management of hazardous wastes including adsorption, coagulation (conventional and electrochemical), sand filtration, electrosorption (or CDI), electrodialysis, electrokinetics, membrane (RO, NF, MF), photocatalysis, photoelectrochemical oxidation, sonochemical, non-thermal plasma, supercritical fluid, electrochemical oxidation, and electrochemical reduction processes were reviewed. Chemical methods including ozone-based, hydrogen peroxide-based, persulfate-based, Fenton and Fenton-like, and potassium permanganate processes for the management of hazardous were reviewed. Biological methods such as aerobic, anaerobic, bioreactor, constructed wetlands, soil bioremediation and biofilter processes for the management of hazardous wastes, in mode of consortium and pure culture were reviewed.
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Affiliation(s)
- Jianmin Wang
- Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science & Technology, Rolla, Missouri
| | - Yujen Shih
- Graduate Institute of Environmental Engineering, National Sun yat-sen University, Kaohsiung, Taiwan
| | - Po Yen Wang
- Department of Civil Engineering, Weidner University, Chester, Pennsylvania
| | - Yu Han Yu
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
| | - Jenn Fang Su
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware
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Dasineh Khiavi N, Katal R, Kholghi Eshkalak S, Masudy-Panah S, Ramakrishna S, Jiangyong H. Visible Light Driven Heterojunction Photocatalyst of CuO-Cu 2O Thin Films for Photocatalytic Degradation of Organic Pollutants. NANOMATERIALS 2019; 9:nano9071011. [PMID: 31337085 PMCID: PMC6669717 DOI: 10.3390/nano9071011] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 11/16/2022]
Abstract
A high recombination rate and low charge collection are the main limiting factors of copper oxides (cupric and cuprous oxide) for the photocatalytic degradation of organic pollutants. In this paper, a high performance copper oxide photocatalyst was developed by integrating cupric oxide (CuO) and cuprous oxide (Cu2O) thin films, which showed superior performance for the photocatalytic degradation of methylene blue (MB) compared to the control CuO and Cu2O photocatalyst. Our results show that a heterojunction photocatalyst of CuO–Cu2O thin films could significantly increase the charge collection, reduce the recombination rate, and improve the photocatalytic activity.
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Affiliation(s)
- Negar Dasineh Khiavi
- Faculty of Biosciences & Medical Engineering, University Technology Malaysia, Johor 81310, Malaysia
| | - Reza Katal
- Department of Civil & Environmental Engineering, National University of Singapore, Singapore 119260, Singapore
| | - Saeideh Kholghi Eshkalak
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore
| | - Saeid Masudy-Panah
- Electrical and Computer Engineering, National University of Singapore, Singapore 119260, Singapore
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore.
| | - Hu Jiangyong
- Department of Civil & Environmental Engineering, National University of Singapore, Singapore 119260, Singapore.
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40
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Wang X, Chen B, Yan D, Zhao X, Wang C, Liu E, Zhao N, He F. Distorted 1T-ReS 2 Nanosheets Anchored on Porous TiO 2 Nanofibers for Highly Enhanced Photocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23144-23151. [PMID: 31252469 DOI: 10.1021/acsami.9b03772] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Recently, loading TiO2 with transition-metal disulfides (TMDs) to construct dual functional heterostructures has been widely researched as an effective strategy to improve the photocatalytic performance of a TiO2 photocatalyst. For the TMD cocatalysts, the 2H-MoS2 and 1T-MoS2 have been widely studied and researched. However, they suffer from poor catalytic activity sites/low charge transfer ability and an unstable structure. In this regard, distorted 1T-phase TMDs with a stable structure are greatly fit for the cocatalyst due to their high charge transfer ability and rich catalytic sites on both the edge and basal plane. Therefore, it is highly desirable to develop distorted 1T-phase TMD/TiO2 heterostructures with well-identified interfaces for highly enhanced photocatalytic performance. Herein, we first introduce distorted 1T-ReS2 anchored on porous TiO2 nanofibers as a promising photocatalyst for achieving an excellent photocatalytic hydrogen production. The excellent performance is attributed to the strong chemical interaction of the Ti-O-Re bond between TiO2 and ReS2, the excellent electron mobility of distorted 1T-ReS2, and the abundant catalytic activity sites on both the plane and edge of the ReS2 cocatalyst.
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Affiliation(s)
- Xinqian Wang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Biao Chen
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Dedao Yan
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Xinyu Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Chenlu Wang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Enzuo Liu
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072 , P.R. China
| | - Naiqin Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072 , P.R. China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin University , Tianjin 300072 , P.R. China
| | - Fang He
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin University , Tianjin 300072 , P.R. China
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41
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Pylnev M, Wong MS. Comparative study of photocatalytic deactivation of pure and black titania thin films. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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42
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Katal R, Kholghi Eshkalak S, Masudy-Panah S, Kosari M, Saeedikhani M, Zarinejad M, Ramakrishna S. Evaluation of Solar-Driven Photocatalytic Activity of Thermal Treated TiO₂ under Various Atmospheres. NANOMATERIALS 2019; 9:nano9020163. [PMID: 30699943 PMCID: PMC6409930 DOI: 10.3390/nano9020163] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/23/2019] [Accepted: 01/25/2019] [Indexed: 12/02/2022]
Abstract
In this report, the photocatalytic activity of P25 has been explored and the influence of thermal treatment under various atmospheres (air, vacuum and hydrogen) were discussed. The samples’ characteristics were disclosed by means of various instruments including X-ray diffraction (XRD), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS) and UV–vis. This study also accentuates various states of the oxygen vacancy density formed inside the samples as well as the colour turning observed in treated P25 under various atmospheres. Produced coloured TiO2 samples were then exploited for their photocatalytic capability concerning photodegradation of methylene blue (MB) using air mass (AM) 1.5 G solar light irradiation. Our findings revealed that exceptional photocatalytic activity of P25 is related to the thermal treatment. Neither oxygen vacancy formation nor photocatalytic activity enhancement was observed in the air-treated sample. H2-treated samples have shown better photoactivity which even could be further improved by optimizing treatment conditions to achieve the advantages of the positive role of oxygen vacancy (O-vacancy at higher concentration than optimum acts as electron trapping sites). The chemical structure and stability of the samples were also studied. There was no sign of deteriorating of O2-vacancies inside the samples after 6 months. High stability of thermal treated samples in terms of both long and short-term time intervals is another significant feature of the produced photocatalyst.
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Affiliation(s)
- Reza Katal
- Department of Civil & Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
| | - Saeideh Kholghi Eshkalak
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore.
| | - Saeid Masudy-Panah
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 119260, Singapore.
| | - Mohammadreza Kosari
- Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, Singapore 119260, Singapore.
| | - Mohsen Saeedikhani
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117583, Singapore.
| | - Mehrdad Zarinejad
- Singapore Institute of Manufacturing Technology (SIMTech), A*STAR (Agency for Science, Technology and Research), Singapore 138634, Singapore.
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117575, Singapore.
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43
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Hao W, Li X, Qin L, Han S, Kang SZ. Facile preparation of Ti3+ self-doped TiO2 nanoparticles and their dramatic visible photocatalytic activity for the fast treatment of highly concentrated Cr(vi) effluent. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00161a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An efficient visible photocatalyst which is suitable for the rapid removal of highly concentrated Cr(vi) for environmental therapy.
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Affiliation(s)
- Weiming Hao
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Xiangqing Li
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Lixia Qin
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Sheng Han
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Shi-Zhao Kang
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
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44
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Catalyst-Doped Anodic TiO2 Nanotubes: Binder-Free Electrodes for (Photo)Electrochemical Reactions. Catalysts 2018. [DOI: 10.3390/catal8110555] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Nanotubes of the transition metal oxide, TiO2, prepared by electrochemical anodization have been investigated and utilized in many fields because of their specific physical and chemical properties. However, the usage of bare anodic TiO2 nanotubes in (photo)electrochemical reactions is limited by their higher charge transfer resistance and higher bandgaps than those of semiconductor or metal catalysts. In this review, we describe several techniques for doping TiO2 nanotubes with suitable catalysts or active materials to overcome the insulating properties of TiO2 and enhance its charge transfer reaction, and we suggest anodization parameters for the formation of TiO2 nanotubes. We then focus on the (photo)electrochemistry and photocatalysis-related applications of catalyst-doped anodic TiO2 nanotubes grown on Ti foil, including water electrolysis, photocatalysis, and solar cells. We also discuss key examples of the effects of doping and the resulting improvements in the efficiency of doped TiO2 electrodes for the desired (photo)electrochemical reactions.
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