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Wu J, Shao G, Wu X, Cui S, Shen X. Ag-Incorporated Cr-Doped BaTiO 3 Aerogel toward Enhanced Photocatalytic Degradation of Methyl Orange. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:848. [PMID: 38786804 PMCID: PMC11123771 DOI: 10.3390/nano14100848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/07/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024]
Abstract
A novel Cr-doped BaTiO3 aerogel was successfully synthesized using a co-gelation technique that involves two metallic alkoxides and a supercritical drying method. This freshly prepared aerogel has a high specific surface area of over 100 m2/g and exhibits improved responsiveness to the simulated sunlight spectrum. Methyl orange (MO) was chosen as the simulated pollutant, and the results reveal that the Cr-doped BaTiO3 aerogel, when modified with the noble metal silver (Ag), achieves a pollutant removal rate approximately 3.2 times higher than that of the commercially available P25, reaching up to 92% within 60 min. The excellent photocatalytic performance of the Ag-modified Cr-doped BaTiO3 aerogel can be primarily attributed to its extensive specific surface area and three-dimensional porous architecture. Furthermore, the incorporation of Ag nanoparticles effectively suppresses the recombination of photo-generated electrons and holes. Stability and reusability tests have confirmed the reliability of the Ag-modified Cr-doped BaTiO3 aerogel. Therefore, this material emerges as a highly promising candidate for the treatment of textile wastewater.
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Affiliation(s)
- Jun Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Gaofeng Shao
- School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Xiaodong Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Sheng Cui
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Xiaodong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; (J.W.); (X.W.); (S.C.)
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
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Ahtasham Iqbal M, Akram S, Khalid S, Lal B, Hassan SU, Ashraf R, Kezembayeva G, Mushtaq M, Chinibayeva N, Hosseini-Bandegharaei A. Advanced photocatalysis as a viable and sustainable wastewater treatment process: A comprehensive review. ENVIRONMENTAL RESEARCH 2024; 253:118947. [PMID: 38744372 DOI: 10.1016/j.envres.2024.118947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/14/2024] [Accepted: 04/14/2024] [Indexed: 05/16/2024]
Abstract
In our era, water pollution not only poses a serious threat to human, animal, and biotic life but also causes serious damage to infrastructure and the ecosystem. A set of physical, chemical, and biological technologies have been exploited to decontaminate and/or disinfect water pollutants, toxins, microbes, and contaminants, but none of these could be ranked as sustainable and scalable wastewater technology. The photocatalytic process can harmonize the sunlight to degrade certain toxins, chemicals, microbes, and antibiotics, present in water. For example, transition metal oxides (ZnO, SnO2, TiO2, etc.), when integrated into an organic framework of graphene or nitrides, can bring about more than 90% removal of dyes, microbial load, pesticides, and antibiotics. Similarly, a modified network of graphitic carbon nitride can completely decontaminate petrochemicals. The present review will primarily highlight the mechanistic aspects for the removal and/or degradation of highly concerned contaminants, factors affecting photocatalysis, engineering designs of photoreactors, and pros and cons of various wastewater treatment technologies already in practice. The photocatalytic reactor can be a more viable and sustainable wastewater treatment opportunity. We hope the researcher will find a handful of information regarding the advanced oxidation process accomplished via photocatalysis and the benefits associated with the photocatalytic-type degradation of water pollutants and contaminants.
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Affiliation(s)
| | - Sumia Akram
- Division of Science and Technology, University of Education Lahore, Pakistan
| | - Shahreen Khalid
- Department of Chemistry, Government College University Lahore, Pakistan
| | - Basant Lal
- Department of Chemistry, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
| | - Sohaib Ul Hassan
- Department of Irrigation & Drainage, University of Agriculture, Faisalabad, Pakistan
| | - Rizwan Ashraf
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | - Gulmira Kezembayeva
- Mining and Metallurgical Institute Named After O.A. Baikonurov, Department Chemical Processes and Industrial Ecology, Satbayev University, Almaty, Kazakhstan
| | - Muhammad Mushtaq
- Department of Chemistry, Government College University Lahore, Pakistan.
| | | | - Ahmad Hosseini-Bandegharaei
- Faculty of Chemistry, Semnan University, Semnan, Iran; Centre of Research Impact and Outcome, Chitkara University, Rajpura-140417, Punjab, India; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai-602105, Tamil Nadu, India.
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3
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Bhava A, Shenoy US, Bhat DK. Silver doped barium titanate nanoparticles for enhanced visible light photocatalytic degradation of dyes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123430. [PMID: 38281571 DOI: 10.1016/j.envpol.2024.123430] [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: 11/04/2023] [Revised: 01/01/2024] [Accepted: 01/21/2024] [Indexed: 01/30/2024]
Abstract
Due to the rapid growth of global population, new, fast and reliable methods must be developed to purify contaminated water. Various photocatalysts have been developed to remove organic dyes from water. Herein, Ag doped BaTiO3 has been synthesized using a facile solvothermal method and its excellent photocatalytic activities were demonstrated in degradation of both anionic and cationic dyes under visible light illumination. Ag doped BaTiO3 nanoparticles showed greater efficacy in the degradation of methylene blue (MB) and eosin yellow (EY) than undoped BaTiO3 nanoparticles, which makes them a better candidate for photocatalysis. 1.0 AgBT sample showed the highest photocatalytic activity for MB (99.1 % in 100 min) and EY (99.3 % in 60 min) dye degradation compared with those of other samples. Further, the trapping experiments revealed that hydroxyl radicals and holes are the active species in the photocatalytic process of MB and EY dye degradation and recycle test showed excellent stability of the synthesized material.
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Affiliation(s)
- A Bhava
- Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore, 575025, India
| | - U Sandhya Shenoy
- Department of Material Science and Engineering, Institute of Engineering and Technology, Srinivas University, Mukka, Mangalore, 574146, India
| | - D Krishna Bhat
- Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore, 575025, India.
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Rawal J, Lee SY, Park SJ. Facile synthesis of a GO-g-C 3N 4/BaTiO 3 ternary nanocomposites for visible-light-driven photocatalytic degradation of rhodamine B. CHEMOSPHERE 2023; 345:140479. [PMID: 37863208 DOI: 10.1016/j.chemosphere.2023.140479] [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: 07/02/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/22/2023]
Abstract
Photogenerated charge carriers can undergo rapid recombination in conventional photocatalyst systems, reducing their photocatalytic efficiency. To address this bottleneck, a g-C3N4/BaTiO3 (CNB) heterojunction composite was decorated with different mass ratios of graphene oxide (GO) to form a novel visible-light responsive ternary GO-g-C3N4/BaTiO3 (GOCNB) nanocomposite using a facile fabrication method. The GOCNB photocatalyst exhibited significantly higher light absorption and greater charge transfer than CNB, g-C3N4, or BaTiO3. The photodegradation performance of GOCNB was optimized with a 2% mass loading of GO, and it achieved a degradation rate constant of 14.9 × 10-3 min-1 for rhodamine B with an efficiency of 94% within 180 min. The rate constant was 8-fold and 6-fold higher than that of bare BaTiO3 and CNB, respectively. The stronger photocatalytic activity was attributed to the synergistic effect of GO, g-C3N4, and BaTiO3, with g-C3N4 and BaTiO3 promoting charge transfer within a wider visible light range and GO promoting electron mobility and the photocatalyst's adsorption capacity. In particular, the proposed system maintained the spatial separation of photogenerated electron-hole pairs, which is vital for high photocatalytic activity. This study provides new insights into semiconductor-based photocatalytic systems and suggests a route for more environmentally sustainable technologies.
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Affiliation(s)
- Jishu Rawal
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
| | - Seul-Yi Lee
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
| | - Soo-Jin Park
- Department of Chemistry, Inha University, 100 Inharo, Incheon, 22212, South Korea.
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Comparán-Padilla VE, Romero-de la Cruz MT, García-Díaz R, Pérez-Camacho O. CO to formaldehyde transformation study on pristine and Au-modified BaTiO 3(001) through DFT calculations. J Mol Model 2023; 29:285. [PMID: 37608185 DOI: 10.1007/s00894-023-05697-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 08/16/2023] [Indexed: 08/24/2023]
Abstract
CONTEXT BaTiO3 is one of the most important ferroelectric oxides in electronic applications. Also, it has attractive properties for catalysis that could be used for reducing contamination levels, especially carbon monoxide, CO. CO is one of the main gaseous pollutants generally released from the combustion of fossil fuel. In this work, the CO transformation on pristine and Au-modified BaTiO3 perovskite for H2CO obtention is studied. The CO adsorption and hydrogenation on pristine BaTiO3 leads to formaldehyde synthesis as the most stable product through two possible routes. Furthermore, hydrogenation stages are less probable on pristine BaTiO3. On Au-modified BaTiO3 formaldehyde is the principal product too but Au adatom generates H2CO competition with HCOH. After BaTiO3 modification with Au unpaired electrons were generated. These unpaired electrons are related to the adatom reactivity. According to the obtained results, pristine and Au-modified BaTiO3 can adsorb and hydrogenate CO generating formaldehyde as the principal product. BaTiO3 modifications with Au increase the reactivity of the perovskite in the CO hydrogenation reactions. CO hydrogenation process on Au suggests that further hydrogenation stages beyond formaldehyde are possible. METHODS The study was performed through ab initio calculations using the periodic spin-polarized Density Functional Theory (DFT) as implemented in Quantum ESPRESSO. DFT calculations were carried out using the Plane Wave self-consistent field (PWscf). Spin density difference allows us to identify reactive regions related to dangling bonds and unpaired electrons. A plane wave basis set was used to represent the electron states. Vanderbilt pseudopotentials with nonlinear core correction were used to model the ionic cores and valence electrons interaction. Exchange-correlation energies were treated within the generalized gradient approximation (GGA) with the Perdew-Burke-Ernzerhof (PBE) parameterization.
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Affiliation(s)
- Víctor E Comparán-Padilla
- Centro de Investigación en Química Aplicada, Química Macromolecular y Nanomateriales, Blvd. Enrique Reyna, C.P. 25294, Saltillo, Coahuila, Mexico.
| | - María Teresa Romero-de la Cruz
- Universidad Autónoma de Coahuila, Facultad de Ciencias Físico Matemáticas, Prol. David Berlanga S/N Edif. "A" Unidad Camporredondo, C.P. 25000, Saltillo, Coahuila, Mexico
| | - Reyes García-Díaz
- CONAHCYT-Universidad Autónoma de Coahuila, Facultad de Ciencias Físico Matemáticas, Prol. David Berlanga S/N Edif. "A" Unidad Camporredondo, C.P. 25000, Saltillo, Coahuila, Mexico
| | - Odilia Pérez-Camacho
- Centro de Investigación en Química Aplicada, Química Macromolecular y Nanomateriales, Blvd. Enrique Reyna, C.P. 25294, Saltillo, Coahuila, Mexico
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Li X, Zheng H, Liu J, Li H, Wang J, Yan K, Liu J, Dang F, Zhu K. Piezo-photocatalytic properties of BaTiO 3/CeO 2 nanoparticles with heterogeneous structure synthesized by a gel-assisted hydrothermal method. RSC Adv 2023; 13:24583-24593. [PMID: 37593666 PMCID: PMC10427892 DOI: 10.1039/d3ra04014c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 08/10/2023] [Indexed: 08/19/2023] Open
Abstract
BaTiO3/CeO2 nanoparticles with heterogeneous structure were successfully synthesized via a gel-assisted hydrothermal method. The molar ratio of Ti/Ce was set as 1 : 0, 0.925 : 0.075, 0.9 : 0.1; 0.875 : 0.125, and 0.85 : 0.15 in the dried gels. Affected by the values of Ti/Ce, the particle sizes of hydrothermal products decreased obviously, and the surface of nanoparticles became rough and even had small protrusions. XRD, SEM, HRTEM, XPS, DRS, ESR, and PFM were used to characterize the nanoparticle textures. We speculated that the main body and surface of nanoparticles were BaTiO3 and CeO2 protrusions, respectively. The catalytic performance of BaTiO3/CeO2 nanoparticles was characterized by their abilities to degrade RhB in water under different external conditions (light irradiation, ultrasonic oscillation, or both). In all test groups, BaTiO3/CeO2 nanoparticles with a Ti/Ce molar ratio of 0.875 : 0.125 in the initial dried gel exhibited the strongest catalytic ability when light irradiation and ultrasonication were applied simultaneously owing to the appropriate amount of Ce3+ and oxygen vacancies.
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Affiliation(s)
- Xia Li
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Hongjuan Zheng
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Jingjin Liu
- School of General Education, Wuchang University of Technology Wuhan 430223 P. R. China
| | - Hongcheng Li
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Jing Wang
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Kang Yan
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Jingsong Liu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
| | - Feng Dang
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University Jinan 250061 P. R. China
| | - Kongjun Zhu
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China +86-25-84895759 +86-25-84895982
- College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China
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Patra R, Dash P, Panda PK, Yang PC. A Breakthrough in Photocatalytic Wastewater Treatment: The Incredible Potential of g-C 3N 4/Titanate Perovskite-Based Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2173. [PMID: 37570490 PMCID: PMC10421126 DOI: 10.3390/nano13152173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/14/2023] [Accepted: 07/15/2023] [Indexed: 08/13/2023]
Abstract
Water pollution has emerged as a major global environmental crisis due to the massive contamination of water resources by the textile dyeing industry, organic waste, and agricultural residue. Since water is fundamental to life, this grave disregard puts lives at risk, making the protection of water resources a serious issue today. Recent research has shown great interest in improving the photocatalytic performance of graphitic carbon nitride (g-C3N4) for wastewater treatment. However, the photocatalytic removal activity of pure g-C3N4 is poor, owing to its minimal surface area, fast recombination of photo-generated electron-hole pairs, and poor light absorption. Recently, titanate perovskites (TNPs) have attracted significant attention in both environmental remediation and energy conversion due to their exceptional structural, optical, physiochemical, electrical, and thermal properties. Accordingly, TNPs can initiate a variety of surface catalytic reactions and are regarded as an emerging category of photocatalysts for sustainability and energy-related industries when exposed to illumination. Therefore, in this review article, we critically discuss the recent developments of extensively developed g-C3N4/TNPs that demonstrate photocatalytic applications for wastewater treatment. The different synthetic approaches and the chemical composition of g-C3N4/TNP composites are presented. Additionally, this review highlights the global research trends related to these materials. Furthermore, this review provides insight into the various photocatalytic mechanisms, including their potential impact and significance. Also, the challenges faced by such materials and their future scope are discussed.
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Affiliation(s)
- Rashmiranjan Patra
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
| | - Pranjyan Dash
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 10608, Taiwan;
| | - Pradeep Kumar Panda
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
| | - Po-Chih Yang
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan;
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Elmahgary MG, Mahran AM, Ganoub M, Abdellatif SO. Optical investigation and computational modelling of BaTiO 3 for optoelectronic devices applications. Sci Rep 2023; 13:4761. [PMID: 36959231 PMCID: PMC10036486 DOI: 10.1038/s41598-023-31652-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/15/2023] [Indexed: 03/25/2023] Open
Abstract
ABX3 perovskite-based materials have attracted research attention in various electronic and optoelectronic applications. The ability to tune the energy band gap through various dopants makes perovskites a potential candidate in many implementations. Among various perovskite materials, BaTiO3 has shown great applicability as a robust UV absorber with an energy band gap of around 3.2 eV. Herein, we provide a new sonochemical-assisted solid-phase method for preparing BaTiO3 thin films that optoelectronic devices can typically be used. BaTiO3 nano-powder and the thin film deposited on a glass substrate were characterized using physicochemical and optical techniques. In addition, the work demonstrated a computational attempt to optically model the BaTiO3 from the atomistic level using density functional theory to the thin film level using finite difference time domain Maxwell's equation solver. Seeking repeatability, the dispersion and the extinction behavior of the BaTiO3 thin film have been modeled using Lorentz-Dude (LD) coefficients, where all fitting parameters are listed. A numerical model has been experimentally verified using the experimental UV-Vis spectrometer measurements, recording an average root-mean-square error of 1.44%.
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Affiliation(s)
- Maryam G Elmahgary
- The Chemical Engineering Department, British University in Egypt (BUE), Cairo, 11387, Egypt
| | - Abdelrahman M Mahran
- The Electrical Engineering Department, and FabLab, at the Centre of Emerging Learning Technologies CELT, British University in Egypt (BUE), Cairo, 11387, Egypt
| | - Moustafa Ganoub
- The Renewable Energy Postgraduate Programme, and FabLab, at the Centre of Emerging Learning Technologies CELT, British University in Egypt (BUE), Cairo, 11387, Egypt
| | - Sameh O Abdellatif
- The Electrical Engineering Department, and FabLab, at the Centre of Emerging Learning Technologies CELT, British University in Egypt (BUE), Cairo, 11387, Egypt.
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Masekela D, Hintsho-Mbita NC, Sam S, Yusuf TL, Mabuba N. Application of BaTiO3-based catalysts for piezocatalytic, photocatalytic and piezo-photocatalytic degradation of organic pollutants and bacterial disinfection in wastewater: A comprehensive review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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10
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Passi M, Pal B. Design of a novel Ag-BaTiO3/GO ternary nanocomposite with enhanced visible-light driven photocatalytic performance towards mitigation of carcinogenic organic pollutants. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bioenergy Generation and Wastewater Purification with Li0.95Ta0.76Nb0.19Mg0.15O3 as New Air-Photocathode for MFCs. Catalysts 2022. [DOI: 10.3390/catal12111424] [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
MFC is a promising technology that can be used for simultaneous electricity generation and wastewater treatment. Power energy generation of a ferroelectric cathodic ceramic, Li0.95Ta0.76Nb0.19Mg0.15O3 (LTNMg), has been measured in microbial fuel cells, integrating a single chamber fed by industrial wastewater (CODinitial = 471 mg L−1, and pHinitial = 7.24 at T = 27 °C). In this process, the mixed multicomponent oxide material has been prepared and characterized by XRD, PSD, TEM, and UV-Vis spectroscopy. The catalytic activity has been investigated by COD determination, analysis of heavy metals, and polarization measurement. The results show a high COD reduction efficiency, which reaches 95.70% after a working time of 168 h with a maximal power density of 228 mW m−2. In addition, the maximum value of generated voltage in the open-circuit potential (OCP) of this MFC configuration has been increased from 340 mV in the absence of a light source to 470 mV under irradiation, indicating the presence of a promoting photocatalytic effect of LTNMg, which improved the process of the cathodic electron transfer inside the MFC device.
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Ye Q, Liu C, Wu P, Wu J, Lin L, Li Y, Ahmed Z, Rehman S, Zhu N. Insights into photocatalytic degradation of phthalate esters over MSnO 3 perovskites (M = Mg, Ca): Experiments and density functional theory. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 307:114511. [PMID: 35093753 DOI: 10.1016/j.jenvman.2022.114511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/15/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
In this study, the physicochemical and photocatalytic properties of two kinds of stannate perovskite oxides (MgSnO3 and CaSnO3) were investigated under simulated sunlight, where dimethyl phthalate (DMP) and diethyl phthalate (DEP) were selected as the probe pollutants. The results of photochemical characterization showed that MgSnO3 perovskite exhibited better photocatalytic performance than CaSnO3 perovskite. MgSnO3 perovskite could effectively degrade 75% of DMP and 79% of DEP through pseudo-first-order reaction kinetics, which remained good in pH 3.0 to 9.0. Quenching experiments and electron paramagnetic resonance (EPR) characterization indicated that photogenerated holes (h+), superoxide (O2-), and hydroxyl radicals (OH) worked in the photo-degradation, while O2- played the most important role. Furthermore, intermediates identification and density functional theory (DFT) calculations were used to explore the degradation mechanism. For both DMP and DEP, the reactive oxygen species (ROS, including O2- and OH) were responsible for the hydroxylation of benzene ring and the breaking of the aliphatic chain, while h+ was prone to break the aliphatic chain. This work is expected to provide new insights on the photocatalytic mechanism of stannate perovskites for environmental remediation.
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Affiliation(s)
- Quanyun Ye
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Chenhui Liu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Pingxiao Wu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China.
| | - Jiayan Wu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Lin Lin
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Yihao Li
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Zubair Ahmed
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Saeed Rehman
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Nengwu Zhu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China
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High efficiency degradation of tetracycline and rhodamine B using Z-type BaTiO3/γ-Bi2O3 heterojunction. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Song E, Kim DH, Jeong EJ, Choi M, Kim Y, Jung HJ, Choi MY. Effects of particle size and polymorph type of TiO 2 on the properties of BaTiO 3 nanopowder prepared by solid-state reaction. ENVIRONMENTAL RESEARCH 2021; 202:111668. [PMID: 34246639 DOI: 10.1016/j.envres.2021.111668] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
Barium titanate (BaTiO3) has attracted considerable attention as a perovskite ferroelectric ceramic material for electronic multilayer ceramic capacitors (MLCCs). Fine BaTiO3 nanopowders with a considerably high tetragonality directly influence the typical properties of nanopowders; however, their synthesis has remained challenging. In this study, we analyzed the effect of two different TiO2 powders with anatase and rutile phases in a solid-state reaction with barium carbonate (BaCO3). The effect of the particle size ratio (TiO2/BaCO3) of the raw materials on the tetragonality and particle size of the as-synthesized BaTiO3 powders was also determined through extensive characterization of the powders by X-ray diffraction, field-emission scanning electron microscopy, and Raman spectroscopy. The present investigation reveals that the design BaTiO3 structure is expected to advance the development of efficient catalytic and sensor materials for sustainable environmental applications.
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Affiliation(s)
- Eunji Song
- Convergence Division, Korea Institute of Ceramic Engineering & Technology, 101, Soho-Ro, Jinju, 52851, South Korea; School of Materials Science and Engineering, Pusan National University, Busan, 46241, South Korea
| | - Dong Hyun Kim
- Convergence Division, Korea Institute of Ceramic Engineering & Technology, 101, Soho-Ro, Jinju, 52851, South Korea
| | - Eun Jin Jeong
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Moonhee Choi
- Convergence Division, Korea Institute of Ceramic Engineering & Technology, 101, Soho-Ro, Jinju, 52851, South Korea
| | - Yangdo Kim
- School of Materials Science and Engineering, Pusan National University, Busan, 46241, South Korea.
| | - Hyeon Jin Jung
- Convergence Division, Korea Institute of Ceramic Engineering & Technology, 101, Soho-Ro, Jinju, 52851, South Korea.
| | - Myong Yong Choi
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea.
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