1
|
Keshu, Rani M, Shanker U. Synthesis and characterization of novel guar gum based waste material derived nanocomposite for effective removal of hexabromocyclododecane and lindane. Int J Biol Macromol 2024; 268:131535. [PMID: 38631586 DOI: 10.1016/j.ijbiomac.2024.131535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 04/01/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024]
Abstract
Herein, efficient degradation of hexabromocyclododecane (HBCD) and Lindane, a persistent organic pollutant using guar gum based calcium oxide doped silicon dioxide (GG-CaO@SiO2) has been reported. The nanocomposite was prepared by waste egg shell (CaO) and rice husk (SiO2) was well characterized. The maximum degradation of HBCD and Lindane were observed at 8 mg catalyst loading, neutral pH, and 2 mg L-1 of pollutant amount. The photocatalytic performance of GG-CaO@SiO2 for HBCD and Lindane photodegradation was evaluated, and it was found that the rate constant increased in the order of GG-CaO@SiO2 > CaO@SiO2 > GG. The polymeric GG-CaO@SiO2 nanocomposite showed maximum removal of both pollutants due to higher surface area (70 m2 g-1) and synergistic interactions among GG moieties. It achieved HBCD and Lindane elimination rates of 94 % and 90 % by photo-adsorptive degradation within 150 min. Meanwhile, the leaching of HBCD from expanded polystyrene (EPS) materials (0.14 ± 0.05 ppm) underwater with different time intervals and degradation of leachate HBCD were also assessed. The eradication of the pollutant manifested first-order kinetics, with the Langmuir adsorption. LC-MS analysis confirmed that GG-CaO@SiO2 effectively breaks down complex structure toxic pollutants into safer metabolites under natural sunlight exposure. The polymeric GG-CaO@SiO2 nanocomposite showed notable reusability up to ten cycle promotes sustainability.
Collapse
Affiliation(s)
- Keshu
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology Jalandhar, Jalandhar 144008, Punjab, India; Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India
| | - Manviri Rani
- Department of Chemistry, Dr B R Ambedkar National Institute of Technology Jalandhar, Jalandhar 144008, Punjab, India.
| | - Uma Shanker
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India.
| |
Collapse
|
2
|
Fakhrutdinova ED, Volokitina AV, Kulinich SA, Goncharova DA, Kharlamova TS, Svetlichnyi VA. Plasmonic Nanocomposites of ZnO-Ag Produced by Laser Ablation and Their Photocatalytic Destruction of Rhodamine, Tetracycline and Phenol. MATERIALS (BASEL, SWITZERLAND) 2024; 17:527. [PMID: 38276466 PMCID: PMC10818360 DOI: 10.3390/ma17020527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/13/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
Hydrosphere pollution by organic pollutants of different nature (persistent dyes, phenols, herbicides, antibiotics, etc.) is one of the urgent ecological problems facing humankind these days. The task of water purification from such pollutants can be effectively solved with the help of modern photocatalytic technologies. This article is devoted to the study of photocatalytic properties of composite catalysts based on ZnO modified with plasmonic Ag nanoparticles. All materials were obtained by laser synthesis in liquid and differed by their silver content and preparation conditions, such as additional laser irradiation and/or annealing of produced powders. The prepared ZnO-Ag powders were investigated by electron microscopy, X-ray diffraction and UV-Vis spectroscopy. Photocatalytic tests were carried out with well- known test molecules in water (persistent dye rhodamine B, phenol and common antibiotic tetracycline) using LED light sources with wavelengths of 375 and 410 nm. The introduction of small concentrations (up to 1%) of plasmonic Ag nanoparticles is shown to increase the efficiency of the ZnO photocatalyst by expanding its spectral range. Both the preparation conditions and material composition were optimized to obtain composite photocatalysts with the highest efficiency. Finally, the operation mechanisms of the material with different distribution of silver are discussed.
Collapse
Affiliation(s)
- Elena D. Fakhrutdinova
- Laboratory of Advanced Materials and Technology, Tomsk State University, 634050 Tomsk, Russia; (E.D.F.)
| | - Anastasia V. Volokitina
- Laboratory of Advanced Materials and Technology, Tomsk State University, 634050 Tomsk, Russia; (E.D.F.)
- Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Sergei A. Kulinich
- Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Daria A. Goncharova
- Laboratory of Advanced Materials and Technology, Tomsk State University, 634050 Tomsk, Russia; (E.D.F.)
| | | | - Valery A. Svetlichnyi
- Laboratory of Advanced Materials and Technology, Tomsk State University, 634050 Tomsk, Russia; (E.D.F.)
| |
Collapse
|
3
|
Yu J, Yang Y, Sun F, Chen J. Research status and prospect of nano silver (Ag)-modified photocatalytic materials for degradation of organic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:191-214. [PMID: 38049687 DOI: 10.1007/s11356-023-31166-4] [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: 09/21/2023] [Accepted: 11/17/2023] [Indexed: 12/06/2023]
Abstract
Nano silver (Ag) was metallic Ag monomers with particle size to the nanoscale. Photocatalyst was a kind of semiconductor material with photocatalytic function. Loading precious metal Ag onto semiconductor surfaces by microwave, laser-induced, solvent-thermal and hydrothermal methods could capture photogenerated electrons, reduced the compounding rate of holes and photogenerated electrons during the photocatalytic process, thereby improving the electron transfer efficiency of photocatalysis and enhancing the absorption of visible light by silver nanoparticles through the plasma resonance effect. The highly reactive free radicals produced by photocatalysts were used in the organic degradation process to degrade organic matter into inorganic matter and was a faster, more efficient and less polluting method of pollutant degradation, which has attracted a lot of attention from researchers. This review discussed the modification of various types of photocatalysts by nano Ag through different methods. The photocatalytic degradation of dyes, antibiotics and persistent organic pollutants by different modified composites was also analyzed. This review covered the several ways and means in which nano Ag has modified diverse photocatalytic materials as well as the photocatalytic degradation of dyes, antibiotics and persistent organic pollutants. This review identified the drawbacks of the existing nano Ag-modified photocatalytic materials, including their low yield and lack of recyclability, and it also offered suggestions for potential future directions for their improvement. The purpose of this review was to further research on the technology of nano Ag-modified photocatalytic materials and to encourage the creation of new modified photocatalytic nanomaterials for the treatment of organic pollutant degradation.
Collapse
Affiliation(s)
- Jingjing Yu
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Yuewei Yang
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Fengfei Sun
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China
| | - Junfeng Chen
- School of Life Sciences, Qufu Normal University, Qufu, 273165, People's Republic of China.
| |
Collapse
|
4
|
Inoue T, Chuaicham C, Saito N, Ohtani B, Sasaki K. Z-scheme heterojunction of graphitic carbon nitride and calcium ferrite in converter slag for the photocatalytic imidacloprid degradation and hydrogen evolution. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
|
5
|
He J, Li J, Gao Y, He X, Hao G. Nano-based smart formulations: A potential solution to the hazardous effects of pesticide on the environment. JOURNAL OF HAZARDOUS MATERIALS 2023; 456:131599. [PMID: 37210783 DOI: 10.1016/j.jhazmat.2023.131599] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/21/2023] [Accepted: 05/07/2023] [Indexed: 05/23/2023]
Abstract
Inefficient usage, overdose, and post-application losses of conventional pesticides have resulted in severe ecological and environmental issues, such as pesticide resistance, environmental contamination, and soil degradation. Advances in nano-based smart formulations are promising novel methods to decrease the hazardous impacts of pesticide on the environment. In light of the lack of a systematic and critical summary of these aspects, this work has been structured to critically assess the roles and specific mechanisms of smart nanoformulations (NFs) in mitigating the adverse impacts of pesticide on the environment, along with an evaluation of their final environmental fate, safety, and application prospects. Our study provides a novel perspective for a better understanding of the potential functions of smart NFs in reducing environmental pollution. Additionally, this study offers meaningful information for the safe and effective use of these nanoproducts in field applications in the near future.
Collapse
Affiliation(s)
- Jie He
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, PR China.
| | - Jianhong Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, PR China.
| | - Yangyang Gao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, PR China.
| | - Xiongkui He
- College of Science, China Agricultural University, Beijing 100193, PR China; College of Agricultural Unmanned System, China Agricultural University, Beijing 100193, PR China.
| | - Gefei Hao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, PR China; National Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
| |
Collapse
|
6
|
Rani M, Yadav J, Shanker U, Sillanpää M. Green Synthesized Zinc Derived Nanocomposites with Enhanced Photocatalytic Activity: An Updated Review on Structural Modification, Scientific Assessment and Environmental Applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
Theerthagiri J, Karuppasamy K, Lee SJ, Shwetharani R, Kim HS, Pasha SKK, Ashokkumar M, Choi MY. Fundamentals and comprehensive insights on pulsed laser synthesis of advanced materials for diverse photo- and electrocatalytic applications. LIGHT, SCIENCE & APPLICATIONS 2022; 11:250. [PMID: 35945216 PMCID: PMC9363469 DOI: 10.1038/s41377-022-00904-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 06/11/2022] [Accepted: 06/20/2022] [Indexed: 05/03/2023]
Abstract
The global energy crisis is increasing the demand for innovative materials with high purity and functionality for the development of clean energy production and storage. The development of novel photo- and electrocatalysts significantly depends on synthetic techniques that facilitate the production of tailored advanced nanomaterials. The emerging use of pulsed laser in liquid synthesis has attracted immense interest as an effective synthetic technology with several advantages over conventional chemical and physical synthetic routes, including the fine-tuning of size, composition, surface, and crystalline structures, and defect densities and is associated with the catalytic, electronic, thermal, optical, and mechanical properties of the produced nanomaterials. Herein, we present an overview of the fundamental understanding and importance of the pulsed laser process, namely various roles and mechanisms involved in the production of various types of nanomaterials, such as metal nanoparticles, oxides, non-oxides, and carbon-based materials. We mainly cover the advancement of photo- and electrocatalytic nanomaterials via pulsed laser-assisted technologies with detailed mechanistic insights and structural optimization along with effective catalytic performances in various energy and environmental remediation processes. Finally, the future directions and challenges of pulsed laser techniques are briefly underlined. This review can exert practical guidance for the future design and fabrication of innovative pulsed laser-induced nanomaterials with fascinating properties for advanced catalysis applications.
Collapse
Affiliation(s)
- Jayaraman Theerthagiri
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - K Karuppasamy
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Seung Jun Lee
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - R Shwetharani
- Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Bangalore, 562112, Karnataka, India
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - S K Khadheer Pasha
- Department of Physics, Vellore Institute of Technology (Amaravati Campus), Amaravati, 522501, Guntur, Andhra Pradesh, India
| | - Muthupandian Ashokkumar
- School of Chemistry, University of Melbourne, Parkville Campus, Melbourne, VIC, 3010, Australia
| | - Myong Yong Choi
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry, Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea.
| |
Collapse
|
8
|
Ansari M, Sharifian M, Farzadkia M. Removal of lindane in water by non-thermal plasma: Parametric optimization, kinetic study, energy yield evaluation, and toxicity assessment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
9
|
Park J, Kim J, Min A, Choi MY. Fabrication of nonenzymatic electrochemical sensor based on Zn@ZnO core-shell structures obtained via pulsed laser ablation for selective determination of hydroquinone. ENVIRONMENTAL RESEARCH 2022; 204:112340. [PMID: 34740621 DOI: 10.1016/j.envres.2021.112340] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/30/2021] [Accepted: 10/31/2021] [Indexed: 06/13/2023]
Abstract
Herein, we fabricated a more sensitive nonenzymatic electrochemical sensor for the selective determination of hydroquinone as a targeted pollutant at zinc@zinc oxide (Zn@ZnO) core-shell nanostructures. The nanostructured Zn@ZnO materials were produced using pulsed laser ablation in an aqueous medium without the use of any reducing agents or surfactants. The detailed structural, morphological, elemental composition, and electrochemical voltammetric analyses revealed a significant improvement in Zn@ZnO performance for selective hydroquinone detection. A broad linear calibration response was obtained as 10-90 μM with high sensitivity of 0.5673 μA μM-1 cm-2 and the low detection limit was 0.10443 μM for detection of hydroquinone. The modified Zn@ZnO electrode's excellent electrochemical sensing performance was attributed to the accessibility of a high electrochemically active surface area (EASA = 0.00345 μF/cm2) and an improved electron transfer rate. Stability and antiinterference tests were also carried out. A 100 fold increase in the concentration of common cations and anions (Na+, Mg2+, Cl-, SO42-, and NO3-) did not affect the selective determination of HQ. As a result, the fabricated electrochemical sensor has a wide range of potential applications in environmental and biomedical science.
Collapse
Affiliation(s)
- Juhyeon Park
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Jiwon Kim
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Ahreum Min
- Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, South Korea
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea; Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, South Korea.
| |
Collapse
|
10
|
González-Crisostomo JC, López-Juárez R, Yocupicio-Gaxiola RI, Villanueva E, Zavala-Flores E, Petranovskii V. Chabazite Synthesis and Its Exchange with Ti, Zn, Cu, Ag and Au for Efficient Photocatalytic Degradation of Methylene Blue Dye. Int J Mol Sci 2022; 23:ijms23031730. [PMID: 35163652 PMCID: PMC8836194 DOI: 10.3390/ijms23031730] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/19/2022] [Accepted: 01/30/2022] [Indexed: 02/06/2023] Open
Abstract
A chabazite-type zeolite was prepared by the hydrothermal method. Before ion exchange, the chabazite was activated with ammonium chloride (NH4Cl). The ion exchange process was carried out at a controlled temperature and constant stirring to obtain ion-exchanged chabazites of Ti4+ chabazite (TiCHA), Zn2+ chabazite (ZnCHA), Cu2+ chabazite (CuCHA), Ag+ chabazite (AgCHA) and Au3+ chabazite (AuCHA). Modified chabazite samples were characterized by X-ray diffraction (XRD), scanning electron microscope equipped with energy-dispersive spectroscopy (SEM-EDS), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), N2 adsorption methods and UV–visible diffuse reflectance spectroscopy (DRS). XRD results revealed that the chabazite structure did not undergo any modification during the exchange treatments. The photocatalytic activity of chabazite samples was evaluated by the degradation of methylene blue (MB) in the presence of H2O2 under ultraviolet (UV) light illumination. The photodegradation results showed a higher degradation efficiency of modified chabazites, compared to the synthesized chabazite. CuCHA showed an efficiency of 98.92% in MB degradation, with a constant of k = 0.0266 min−1 following a first-order kinetic mechanism. Then, it was demonstrated that the modified chabazites could be used for the photodegradation of dyes.
Collapse
Affiliation(s)
- José C. González-Crisostomo
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Tecnológico, Mesa de Otay, Tijuana 22390, Mexico;
- Correspondence:
| | - Rigoberto López-Juárez
- Instituto de Investigaciones en Materiales, Unidad Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro, ExHacienda San José de la Huerta, Morelia 58190, Mexico;
| | - Rosario Isidro Yocupicio-Gaxiola
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
| | - Eric Villanueva
- Facultad de Ciencias de la Ingeniería y Tecnología, Unidad Valle de las Palmas, Universidad Autónoma de Baja California, Blvd. Universitario, Tijuana 2150018, Mexico;
| | - Ethiel Zavala-Flores
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Tecnológico, Mesa de Otay, Tijuana 22390, Mexico;
| | - Vitalii Petranovskii
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autonoma de México, Km 107 Carretera Tijuana-Ensenada, Ensenada 22800, Mexico; (R.I.Y.-G.); (V.P.)
| |
Collapse
|
11
|
Kim JY, Liu G, Ardhi REA, Park J, Kim H, Lee JK. Stable Zn Metal Anodes with Limited Zn-Doping in MgF 2 Interphase for Fast and Uniformly Ionic Flux. NANO-MICRO LETTERS 2022; 14:46. [PMID: 35064848 PMCID: PMC8783935 DOI: 10.1007/s40820-021-00788-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/07/2021] [Indexed: 06/04/2023]
Abstract
The practical applications of aqueous Zn metal batteries are currently restricted by the inherent drawbacks of Zn such as the hydrogen evolution reaction, sluggish kinetics, and dendrite formation. To address these problems, herein, a limitedly Zn-doped MgF2 interphase comprising an upper region of pure, porous MgF2 and a lower region of gradient Zn-doped MgF2 is achieved via radio frequency sputtering technique. The porous MgF2 region is a polar insulator whose high corrosion resistance facilitates the de-solvation of the solvated Zn ions and suppression of hydrogen evolution, resulting in Zn metal electrodes with a low interfacial resistance. The Zn-doped MgF2 region facilitates fast transfer kinetics and homogeneous deposition of Zn ions owing to the interfacial polarization between the Zn dopant and MgF2 matrix, and the high concentration of the Zn dopant on the surface of the metal substrate as fine nuclei. Consequently, a symmetric cell incorporating the proposed Zn metal exhibits low overpotentials of ~ 27.2 and ~ 99.7 mV without Zn dendrites over 250 to 8000 cycles at current densities of 1.0 and 10.0 mA cm-2, respectively. The developed Zn/MnO2 full cell exhibits superior capacity retentions of 97.5% and 84.0% with average Coulombic efficiencies of 99.96% after 1000 and 3000 cycles, respectively.
Collapse
Affiliation(s)
- Ji Young Kim
- Energy Storage Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Guicheng Liu
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea.
| | - Ryanda Enggar Anugrah Ardhi
- Energy Storage Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Jihun Park
- APC Technology, 108 68 Gangbyeonyeok-ro-4-gil, Gwangjin-gu, Seoul, 05116, Republic of Korea
| | - Hansung Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Joong Kee Lee
- Energy Storage Research Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
- Department of Energy and Environmental Engineering, KIST School, Korea University of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| |
Collapse
|
12
|
Khan MF, Cazzato G, Saleemi HA, Macadangdang Jr. RR, Aftab MN, Ismail M, Khalid H, Ali S, Bakhtiar SUH, Ismail A, Zahid M. Sonophotocatalytic degradation of organic pollutant under visible light over Pt decorated CeO2: Role of ultrasonic waves for unprecedented degradation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131397] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
13
|
Naik SS, Lee SJ, Theerthagiri J, Yu Y, Choi MY. Rapid and highly selective electrochemical sensor based on ZnS/Au-decorated f-multi-walled carbon nanotube nanocomposites produced via pulsed laser technique for detection of toxic nitro compounds. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126269. [PMID: 34116276 DOI: 10.1016/j.jhazmat.2021.126269] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/20/2021] [Accepted: 05/28/2021] [Indexed: 05/20/2023]
Abstract
Novel ZnS/Au/f-multi-walled carbon nanotube (MWCNT) nanostructures were produced via a pulsed laser-assisted technique followed by a wet chemical process. ZnS nanospheres were synthesized via pulsed laser ablation of a Zn target in DMSO, which was used as a solvent and sulfur source. Notably, no additional sulfur sources, surfactants, or reducing agents were used during the synthesis. The structure and morphology of the prepared materials were characterized by X-ray diffraction, micro-Raman spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The fabricated electrochemical sensor based on ZnS/Au/f-MWCNT nanocomposites exhibited rapid and highly selective detection of a toxic pollutant, namely 4-nitrophenol (4-NP). Linear sweep voltammetry analysis revealed that the optimized ZnS/Au10/f-MWCNT3 nanocomposite displayed a wide linear dynamic response (10-150 μM) with high sensitivity (0.8084μAμM-1cm-2) and low limit of detection (30 nM). The excellent 4-NP sensing performance of the modified electrode was attributed to the availability of numerous active sites (electrochemical surface area=0.00369μFcm-2) and an enhanced electron transfer rate. Interference and stability studies were also conducted. A 100-fold excess of competing ions (Na+, K+, Mg2+, Cl-, NO3-, 4-AP, AA, and 2-NP) did not interfere with the selective detection of 4-NP. The newly fabricated ZnS/Au10/f-MWCNT3 nanocomposite could be an effective sensor for the selective and sensitive detection of toxic organic nitro compounds.
Collapse
Affiliation(s)
- Shreyanka Shankar Naik
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Seung Jun Lee
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jayaraman Theerthagiri
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Yiseul Yu
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of 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, Republic of Korea.
| |
Collapse
|
14
|
Naik SS, Lee SJ, Yeon S, Yu Y, Choi MY. Pulsed laser-assisted synthesis of metal and nonmetal-codoped ZnO for efficient photocatalytic degradation of Rhodamine B under solar light irradiation. CHEMOSPHERE 2021; 274:129782. [PMID: 33548639 DOI: 10.1016/j.chemosphere.2021.129782] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 05/20/2023]
Abstract
Solar light-active silver nanoparticle (Ag NP) and nonmetal nitrogen (N)-codoped zinc oxide (ZnO:N/Ag) nanocomposites were fabricated by a pulsed laser-assisted method. N was considered as a promising candidate for tailoring the bandgap of ZnO due to the similar atomic radius as well as lower ionization energy and electronegativity compared to oxygen, which resulted in the formation of a shallow acceptor level in ZnO. Moreover, Ag NPs could enhance the optical properties of the ZnO materials as a consequence of the surface plasmon resonance (SPR) effect. The synthesized ZnO:N/Ag composite materials were characterized by X-ray diffraction (XRD), micro-Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDS), UV-vis diffuse reflectance spectroscopy (UV-DRS), and photoluminescence (PL) analysis. The photocatalytic activity of the ZnO:N/Ag materials was evaluated for the efficient degradation of Rhodamine B (Rh.B) under solar light irradiation. The optimized ZnO:N/Ag-2 nanocomposite exhibited six times higher Rh·B degradation rate than pure ZnO. This was attributed to the enhanced absorption behavior in the solar region as well as the formation of the Schottky junction between ZnO:N and Ag NPs, which resulted in effective charge separation. In addition, the scavenger study revealed that •O2- radicals facilitated the degradation of Rh.B. The reusability test of the ZnO:N/Ag nanocomposite confirmed high photostability and efficiency of the material in each successive cycle. The present investigation illustrates a rational design of metal and nonmetal-codoped ZnO nanostructures employing a pulsed laser-assisted technique for effective application in photocatalytic remediation of wastewater.
Collapse
Affiliation(s)
- Shreyanka Shankar Naik
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Seung Jun Lee
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Sanghun Yeon
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Yiseul Yu
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Myong Yong Choi
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Gyeongsang National University, Jinju, 52828, Republic of Korea.
| |
Collapse
|
15
|
Ng KH, Chen K, Cheng CK, Vo DVN. Elimination of energy-consuming mechanical stirring: Development of auto-suspending ZnO-based photocatalyst for organic wastewater treatment. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124532. [PMID: 33221078 DOI: 10.1016/j.jhazmat.2020.124532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/27/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
Powdered-photocatalysis of organic wastewater is widely investigated, unfortunately not industrially implemented due to its high energy requirement. Interestingly, such issue may be alleviated via the elimination of mechanical stirring required. Core-shell ZnO-based photocatalysts were developed herein, subsequently demonstrated efficient photocatalytic activities in the absence of mechanical stirring. Results show that the developed SiO2-cored ZnO photocatalyst are highly crystalline, while significantly smaller than coreless, pure ZnO due to the multi-point crystallization prompted. Additionally, it is also inherited with considerable buoyancy ability from SiO2-core in the absence of mechanical stirring, concurrently rendered with UV-active properties due to its ZnO-shell. Experimentally, 55% of particles of ZnO_0.0025 (0.0025 mol of ZnO-deposition) were found stably suspended for 60 min in liquid substrate, as opposed to the instant-settling of pure ZnO particles. In term of photocatalytic activity, ZnO_0.01 manifested the best methylene blue (MB) degradation with 150 mL/min of O2-bubbling. 67.63% of MB was degraded with photocatalyst loading of 0.2 g/L after 120 min UV-irradiation, simultaneously recorded the highest pseudo-first order reaction constant of 9.636 × 10-3 min-1. As summary, the auto-suspending photocatalysis conceptualized in current study offers a high possibility in reducing energy requirement for photo-treatment of wastewater, hence advocating its industrialization potential in near future.
Collapse
Affiliation(s)
- Kim Hoong Ng
- College of Chemical Engineering, Fuzhou University, Fuzhou 350116, PR China; School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, 43900, Malaysia.
| | - Kaijuan Chen
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, 43900, Malaysia
| | - Chin Kui Cheng
- Department of Chemical Engineering, College of Engineering, Khalifa University, P. O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Dai-Viet N Vo
- Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City 755414, Viet Nam
| |
Collapse
|
16
|
Adithya S, Jayaraman RS, Krishnan A, Malolan R, Gopinath KP, Arun J, Kim W, Govarthanan M. A critical review on the formation, fate and degradation of the persistent organic pollutant hexachlorocyclohexane in water systems and waste streams. CHEMOSPHERE 2021; 271:129866. [PMID: 33736213 DOI: 10.1016/j.chemosphere.2021.129866] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/23/2021] [Accepted: 02/03/2021] [Indexed: 05/05/2023]
Abstract
The environmental impacts of persistent organic pollutants (POPs) is an increasingly prominent topic in the scientific community. POPs are stable chemicals that are accumulated in living beings and can act as endocrine disruptors or carcinogens on prolonged exposure. Although efforts have been taken to minimize or ban the use of certain POPs, their use is still widespread due to their importance in several industries. As a result, it is imperative that POPs in the ecosystem are degraded efficiently and safely in order to avoid long-lasting environmental damage. This review focuses on the degradation techniques of hexachlorocyclohexane (HCH), a pollutant that has strong adverse effects on a variety of organisms. Different technologies such as adsorption, bioremediation and advanced oxidation process have been critically analyzed in this study. All 3 techniques have exhibited near complete removal of HCH under ideal conditions, and the median removal efficiency values for adsorption, bioremediation and advanced oxidation process were found to be 80%, 93% and 82% respectively. However, it must be noted that there is no ideal HCH removal technique and the selection of removal method depends on several factors. Furthermore, the fates of HCH in the environment and challenges faced by HCH degradation have also been explained in this study. The future scope for research in this field has also received attention.
Collapse
Affiliation(s)
- Srikanth Adithya
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Ramesh Sai Jayaraman
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Abhishek Krishnan
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Rajagopal Malolan
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Kannappan Panchamoorthy Gopinath
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Jayaseelan Arun
- Centre for Waste Management, International Research Centre, Sathyabama Institute of Science and Technology, Jeppiaar Nagar (OMR), Chennai, 600119, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea
| | - Muthusamy Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea.
| |
Collapse
|
17
|
|
18
|
Babu B, Koutavarapu R, Shim J, Kim J, Yoo K. Enhanced solar-light-driven photocatalytic and photoelectrochemical properties of zinc tungsten oxide nanorods anchored on bismuth tungsten oxide nanoflakes. CHEMOSPHERE 2021; 268:129346. [PMID: 33360940 DOI: 10.1016/j.chemosphere.2020.129346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/19/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
At present, sustainable water supply and energy generation are the most important challenges faced by humankind globally. Thus, it is crucial to progress ecological techniques for sustainable removal of organic pollutants from wastewater and generation of hydrogen as an alternative to fossil fuels. In this study, zinc tungsten oxide (ZnWO4) nanorods, bismuth tungsten oxide (Bi2WO6) nanoflakes, and Bi2WO6/ZnWO4 (BO-ZO) nanocomposites were prepared via a simple hydrothermal approach. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, diffuse reflectance spectroscopy, and electrochemical analyses were conducted to confirm the formation of the BO-ZO heterostructure. The structural and morphological analyses revealed that the ZnWO4 nanorods were moderately dispersed on the Bi2WO6 nanoflakes. The bandgap tuning of BO-ZO nanocomposite confirmed the establishment of the heterostructure with band bending properties. The BO-ZO nanocomposite could degrade 99.52% of methylene blue (MB) within 60 min upon solar-light illumination. The photoelectrochemical (PEC) measurement results showed that the BO-ZO nanocomposite showed low charge-transfer resistance and high photocurrent response with good stability. The BO-ZO photoanode showed a low charge-transfer resistance of 35.33 Ω and high photocurrent density of 0.1779 mA/cm2 in comparison with Ag/AgCl in a 0.1 M Na2SO3 electrolyte under solar-light illumination. The MB photocatalytic degradation and PEC water oxidation mechanisms of the nanocomposite were investigated.
Collapse
Affiliation(s)
- Bathula Babu
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| | | | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Jonghoon Kim
- Department of Electrical Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.
| | - Kisoo Yoo
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| |
Collapse
|
19
|
Lee SJ, Begildayeva T, Yeon S, Naik SS, Ryu H, Kim TH, Choi MY. Eco-friendly synthesis of lignin mediated silver nanoparticles as a selective sensor and their catalytic removal of aromatic toxic nitro compounds. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 269:116174. [PMID: 33280906 DOI: 10.1016/j.envpol.2020.116174] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/07/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
The development of an eco-friendly and reliable process for the production of nanomaterials is essential to overcome the toxicity and exorbitant cost of conventional methods. As such, a facile and green synthesis method is introduced for the preparation of lignin mediated silver nanoparticles (L-Ag NPs). This is produced by reducing Ag precursors using lignin biopolymers which are formulated by pulsed laser irradiation and an ultrasonication process. Lignin operates as both a reducing and stabilizing agent. The various analytical techniques of ultraviolet-visible spectroscopy, transmission electron microscope and X-ray diffractometer studies were employed to verify the formation of non-aggregated spherical L-Ag NPs with an average size as small as 7-8 nm. The selective sensing capability of the synthesized L-Ag NPs was examined for the detection of hydrogen peroxide and mercury ions in an aqueous environment. Furthermore, the superior catalytic performance of L-Ag NPs was demonstrated by the rapid conversion of toxic 4-nitrophenol and nitrobenzene as targeted pollutants to the corresponding amino compounds. A plausible catalytic reduction mechanism for the removal of toxic nitro-organic pollutants over L-Ag NPs is proposed. This research coincides with existing studies and affirms that L-Ag NPs are an effective sensor that be applied as a catalytic material within environmental remediation and also alternative biomedical applications.
Collapse
Affiliation(s)
- Seung Jun Lee
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Talshyn Begildayeva
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Sanghun Yeon
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Shreyanka Shankar Naik
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Hakseung Ryu
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Tae Ho Kim
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea.
| |
Collapse
|
20
|
Yudasari N, Wiguna PA, Handayani W, Suliyanti MM, Imawan C. The formation and antibacterial activity of Zn/ZnO nanoparticle produced in Pometia pinnata leaf extract solution using a laser ablation technique. APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING 2021; 127:56. [PMID: 33424136 PMCID: PMC7778852 DOI: 10.1007/s00339-020-04197-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 12/07/2020] [Indexed: 06/12/2023]
Abstract
The single-step green synthesis has been successfully established to prepare a bi-phase structure of Zn/ZnO nanoparticles using laser ablation in a liquid medium. Nd: YAG laser with the wavelength of 1064 nm was employed to perform the laser ablation in pure water and Pometia pinnata (P. pinnata) leaf extract, with the leaf, were extracted in pure water and some concentration of ethanol. ZnO nanoparticles can be obtained via laser ablation in pure water, while the usage of P. pinnata leaf extract as the solution has caused the appearance of the bi-phase Zn/ZnO nanostructure. X-ray diffraction (XRD) pattern indicates the appearance of Zn peaks alongside with ZnO peaks with the inclusion of P. pinnata leaf extract. Transmission electron microscope (TEM) images show the change of shape from the rod-like shape into a spherical shape and smaller size spherical shape of Zn/ZnO nanoparticles in comparison with ZnO. Noticeable change of UV-visible spectrum emerges as the water was substituted by P. pinnata leaf extract. The zeta potential of Zn/ZnO prepared with P. pinnata extracted in water, with the value of - 18.9 V, reduces down to - 43.5 and - 41.1 for 20-40% of ethanol concentration, respectively. The as-prepared ZnO and Zn/ZnO colloidal samples were evaluated for their antibacterial activities against two strains Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Zn/ZnO sample shows a more substantial antibacterial effect in comparison with pure ZnO, no bacteria alive after 12 and 24 h' treatment for E. coli and S. aureus, respectively.
Collapse
Affiliation(s)
- Nurfina Yudasari
- Departemen Fisika, FMIPA, Universitas Indonesia, Depok, 16424 Indonesia
- Research Center for Physics, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Bd. 442, South Tangerang, 15314 Indonesia
| | - Pradita A. Wiguna
- Departemen Fisika, FMIPA, Universitas Indonesia, Depok, 16424 Indonesia
| | - Windri Handayani
- Departemen Biologi, FMIPA, Universitas Indonesia, Depok, 16424 Indonesia
| | - Maria M. Suliyanti
- Research Center for Physics, Indonesian Institute of Sciences, Kawasan PUSPIPTEK Bd. 442, South Tangerang, 15314 Indonesia
| | - Cuk Imawan
- Departemen Fisika, FMIPA, Universitas Indonesia, Depok, 16424 Indonesia
| |
Collapse
|
21
|
Lee SJ, Begildayeva T, Jung HJ, Koutavarapu R, Yu Y, Choi M, Choi MY. Plasmonic ZnO/Au/g-C 3N 4 nanocomposites as solar light active photocatalysts for degradation of organic contaminants in wastewater. CHEMOSPHERE 2021; 263:128262. [PMID: 33297206 DOI: 10.1016/j.chemosphere.2020.128262] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 05/20/2023]
Abstract
In the present study, novel ZnO/Au/graphitic carbon nitride (g-C3N4) nanocomposites were fabricated via a facile and eco-friendly liquid phase pulsed laser process followed by calcination. Notably, the approach did not necessitate the use of any capping agents or surfactants. The as-prepared photocatalysts were evaluated by various electron microscopy and spectroscopy techniques. The obtained results confirmed good dispersion of the Au nanoparticles (NPs) on the surface of spherical ZnO particles deposited on the g-C3N4 nanosheets. The ZnO/Au/g-C3N4 nanocomposite exhibited substantially enhanced catalytic activity toward the degradation of methylene blue (MB) under simulated solar light irradiation. In particular, the ZnO/Au15/g-C3N4 composite containing 15 wt% Au displayed a rate constant, which was approximately 3 and 5 times greater than those of pristine g-C3N4 and ZnO, respectively. This improved photocatalytic activity of ZnO/Au15/g-C3N4 was attributed to the surface plasmon resonance of Au NPs and the synergistic effects between ZnO and g-C3N4. The boundary between ZnO/Au and g-C3N4 enabled direct migration of the photogenerated electrons from g-C3N4 to ZnO/Au, which hindered the recombination of electron-hole pairs and enhanced the carrier separation efficiency. Additionally, a plausible MB degradation mechanism over the ZnO/Au/g-C3N4 photocatalyst is proposed based on the results of the conducted scavenger study.
Collapse
Affiliation(s)
- Seung Jun Lee
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Talshyn Begildayeva
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Hyeon Jin Jung
- Nanomaterials and Nanotechnology Center (Electronic Convergence Division), Korea Institute of Ceramic Engineering & Technology, 101 Soho-ro, Jinju, 52851, South Korea
| | - Ravindranadh Koutavarapu
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Yiseul Yu
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Moonhee Choi
- Nanomaterials and Nanotechnology Center (Electronic Convergence Division), Korea Institute of Ceramic Engineering & Technology, 101 Soho-ro, Jinju, 52851, South Korea.
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea.
| |
Collapse
|
22
|
Naik SS, Lee SJ, Begildayeva T, Yu Y, Lee H, Choi MY. Pulsed laser synthesis of reduced graphene oxide supported ZnO/Au nanostructures in liquid with enhanced solar light photocatalytic activity. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115247. [PMID: 32717637 DOI: 10.1016/j.envpol.2020.115247] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/09/2020] [Accepted: 07/11/2020] [Indexed: 05/20/2023]
Abstract
ZnO/Au/rGO ternary nanocomposites possessing a high photocatalytic response under solar irradiation were synthesized by a two-step process via a pulsed laser synthesis and a wet chemical process. The crystalline structure, surface morphology, size distribution, elemental composition, and optical properties of the prepared ZnO/Au/rGO ternary nanocomposites were characterized using X-ray diffraction, field-emission scanning electron microscope, high-resolution transmission electron microscope, energy-dispersive X-ray spectroscopy, UV-vis diffuse reflectance spectra, and photoluminescence analysis. The photocatalytic activity of the as synthesized nanocomposites was evaluated for the degradation of methylene blue (MB) under solar light irradiation (SLI). The density of the elemental and carbonaceous components, such as the Au nanoparticles (NPs) and the rGO nano-matrix on ZnO, could be altered by changing the concentration of HAuCl4.3H2O (5, 10, 15, and 20 wt%) or rGO (2.5, 5, and 7.5 wt%) using the same synthetic processes. The ZnO/Au15/rGO5 nanocomposite showed the highest photocatalytic degradation efficiency of 95% MB after 120 min under SLI, potentially due to the increased absorption of solar light or the efficient separation and migration of charge carriers by the anchored Au NPs and rGO onto the ZnO NPs. Further, the observed results and reusability of ZnO/Au15/rGO5 makes it an exceptionally promising material for diverse applications in the field of wastewater treatment and other types of environmental remediation.
Collapse
Affiliation(s)
- Shreyanka Shankar Naik
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Seung Jun Lee
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Talshyn Begildayeva
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Yiseul Yu
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Hyeyeon Lee
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry (BK21+) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea.
| |
Collapse
|
23
|
Koutavarapu R, Babu B, Reddy CV, Reddy IN, Reddy KR, Rao MC, Aminabhavi TM, Cho M, Kim D, Shim J. ZnO nanosheets-decorated Bi 2WO 6 nanolayers as efficient photocatalysts for the removal of toxic environmental pollutants and photoelectrochemical solar water oxidation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 265:110504. [PMID: 32275239 DOI: 10.1016/j.jenvman.2020.110504] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Herein we report the fabrication of novel Bi2WO6/ZnO heterostructured hybrids for organic contaminant degradation from wastewater and photoelectrochemical (PEC) water splitting upon solar illumination. The Bi2WO6/ZnO photocatalysts were synthesized using a simple and eco-friendly hydrothermal process without the support of any surfactants. From the photocatalytic experiments, heterostructured Bi2WO6/ZnO nanohybrid catalysts exhibited considerably better photocatalytic performance for rhodamine B (RhB) degradation under solar illumination. The BWZ-20 nanocomposite demonstrated superior photodegradation of RhB dye up to 99% in about 50 min. Furthermore, BWZ-20 photoelectrode showeda lower charge-transfer resistance than other samples prepared, suggesting its suitability for PEC water splitting. The photocurrent densities of Bi2WO6/ZnO photoelectrodes were evaluated under the solar irradiation. The BWZ-20 photoelectrode exhibited a significant photocurrent density (0.45 × 10-3A/cm2) at +0.3 V vs. Ag/AgCl, which was~1036-times higher than that of pure Bi2WO6, and ~4.8-times greater than the pure ZnO. Such improved photocatalytic and PEC activities are mainly attributed to the formation of an interface between ZnO and Bi2WO6, superior light absorption ability, low charge-transfer resistance, remarkable production of charge carriers, easy migration of charges, and suppression of the recombination of photogenerated charge carriers.
Collapse
Affiliation(s)
| | - Bathula Babu
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| | - I Neelakanta Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Kakarla Raghava Reddy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - M C Rao
- Department of Physics, Andhra Loyola College, Vijayawada, 520 008, Andhra Pradesh, India
| | - Tejraj M Aminabhavi
- Department of Pharmaceutics, SETs' College of Pharmacy, Dharwad, 580 007, Karnataka, India.
| | - Migyung Cho
- School of Information Engineering, Tongmyong University, Busan, 608-711, Republic of Korea
| | - Dongseob Kim
- Aircraft System Technology Group, Korea Institute of Industrial Technology, Gyeongbuk-do, 38822, Republic of Korea
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| |
Collapse
|
24
|
Enhanced solar light–driven photocatalytic degradation of tetracycline and organic pollutants by novel one–dimensional ZnWO4 nanorod–decorated two–dimensional Bi2WO6 nanoflakes. J Taiwan Inst Chem Eng 2020. [DOI: 10.1016/j.jtice.2020.03.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
25
|
Chen G, Wang Q, Zhao Z, Gao L, Li X. Synthesis and photocatalytic activity study of S-doped WO 3 under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:15103-15112. [PMID: 32067169 DOI: 10.1007/s11356-020-07827-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 01/22/2020] [Indexed: 06/10/2023]
Abstract
In this study, a photocatalyst S-doped WO3 was successfully synthesized by the hydrothermal method. The prepared undoped and S-doped WO3 samples were then characterized by XRD, SEM, XPS, and UV-vis DRS. The results showed that the band gap energy of S-doped WO3 was lower than that of the undoped WO3, which led to a better absorption of visible light. Furthermore, the results of XPS analysis suggested that the doping with S element resulted in an increase in lattice oxygen vacancies on the surface of S-WO3, which could effectively improve the photocatalytic activity. The photocatalytic performance of the S-WO3 samples were evaluated by the measurement of methylene blue (MB) degradation under visible light irradiation. The experimental results demonstrated that S-doped WO3 sample exhibited a much better photodegradation performance compared to undoped WO3, with the maximum MB removal efficiency of 78.7% for the 5% S-WO3 sample. Based on the above results, the mechanisms of photodegradation of MB by S-WO3 were discussed.
Collapse
Affiliation(s)
- Guodong Chen
- College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, People's Republic of China
| | - Qi Wang
- College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, People's Republic of China
| | - Zhilin Zhao
- College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, People's Republic of China
| | - Li Gao
- Future Water Strategy Group, South East Water, 101 Wells Street, Frankston, Melbourne, Victoria, 3199, Australia
| | - Xiaochen Li
- College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, People's Republic of China.
| |
Collapse
|
26
|
Zhang W, Lin Z, Pang S, Bhatt P, Chen S. Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System. Front Microbiol 2020; 11:522. [PMID: 32292398 PMCID: PMC7119470 DOI: 10.3389/fmicb.2020.00522] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 03/10/2020] [Indexed: 12/19/2022] Open
Abstract
Lindane (γ-hexachlorocyclohexane) is an organochlorine pesticide that has been widely used in agriculture over the last seven decades. The increasing residues of lindane in soil and water environments are toxic to humans and other organisms. Large-scale applications and residual toxicity in the environment require urgent lindane removal. Microbes, particularly Gram-negative bacteria, can transform lindane into non-toxic and environmentally safe metabolites. Aerobic and anaerobic microorganisms follow different metabolic pathways to degrade lindane. A variety of enzymes participate in lindane degradation pathways, including dehydrochlorinase (LinA), dehalogenase (LinB), dehydrogenase (LinC), and reductive dechlorinase (LinD). However, a limited number of reviews have been published regarding the biodegradation and bioremediation of lindane. This review summarizes the current knowledge regarding lindane-degrading microbes along with biodegradation mechanisms, metabolic pathways, and the microbial remediation of lindane-contaminated environments. The prospects of novel bioremediation technologies to provide insight between laboratory cultures and large-scale applications are also discussed. This review provides a theoretical foundation and practical basis to use lindane-degrading microorganisms for bioremediation.
Collapse
Affiliation(s)
- Wenping Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Ziqiu Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shimei Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Pankaj Bhatt
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Shaohua Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| |
Collapse
|
27
|
Wang P, Yang L, Li J, Sadeh B. Zn/ZnO Heterostructure for the Application of MO Degradation and NO Removal. Catal Letters 2020. [DOI: 10.1007/s10562-020-03102-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
28
|
Wang PF, Chen K, Ma S, Wang W, Qiu YH, Ding SJ, Liang S, Wang QQ. Asymmetric synthesis of Au-CdSe core-semishell nanorods for plasmon-enhanced visible-light-driven hydrogen evolution. NANOSCALE 2020; 12:687-694. [PMID: 31829357 DOI: 10.1039/c9nr09370b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The metal-semiconductor heterostructure is an important candidate for photocatalysis due to its efficient charge transport and separation. A controllable morphology and ideal interfaces are critically significant for improving the heterostructure photocatalytic performance. By controlling the concentration of Cd2+ to control the reaction environment (pH value) and reaction rate, the CdSe nanocrystal is overgrown on the side or tip of the Au nanorods, which leads to a strong interaction between the excitons of CdSe nanocrystals and the plasmons of Au nanorods. Both kinds of Au-CdSe heterorods exhibit good hydrogen productivity. Particularly, the lateral Au-CdSe heterorods exhibit excellent photocatalytic efficiency due to the larger contact interface of Au and CdSe and the strong local field of the CdSe nanocrystals grown on one side of the Au nanorods being enhanced by the transverse plasmon resonance in the visible region. We provide an approach to modulate the combination of the asymmetric metal nanoparticle and the semiconductor shell; these core-semishell heterostructures have potential applications ranging from photocatalysis to photonic nanodevices.
Collapse
Affiliation(s)
- Peng-Fei Wang
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
| | - Kai Chen
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Song Ma
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
| | - Wei Wang
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
| | - Yun-Hang Qiu
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
| | - Si-Jing Ding
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China
| | - Shan Liang
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and Department of Physics, Hunan Normal University, Changsha 410081, China
| | - Qu-Quan Wang
- Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| |
Collapse
|
29
|
Reddy CV, Reddy IN, Harish VVN, Reddy KR, Shetti NP, Shim J, Aminabhavi TM. Efficient removal of toxic organic dyes and photoelectrochemical properties of iron-doped zirconia nanoparticles. CHEMOSPHERE 2020; 239:124766. [PMID: 31527001 DOI: 10.1016/j.chemosphere.2019.124766] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/31/2019] [Accepted: 09/04/2019] [Indexed: 05/06/2023]
Abstract
Iron (Fe)-doped ZrO2 tetragonal nanoparticles were synthesized by a facile and inexpensive hydrothermal technique, that were doped with Fe3+ ions (0.1, 0.3, and 0.5 mol%) into the host lattice without altering the morphology and crystal structure of the nanoparticles. SEM and TEM investigations indicated that the morphology of ZrO2 nanoparticles did not change even after incorporation of Fe, while the band gap of semiconducting ZrO2 nanoparticles was reduced from 4.97 to 1.77 eV. Such a in band gap was responsible to harvest more photons to stimulate the generation of more electrons in the valence band, thereby enhancing the photoelectrochemical (PEC) water splitting as well as photocatalytic and photoelectrocatalytic activities in the photodegradation of Rhodamine B. The 0.3 mol%-doped ZrO2 electrode showed enhanced photocurrent density (0.07 × 10-3 A/cm2), that was 45-times greater than the pure sample. The electrochemical impedance spectroscopy (EIS) confirmed that 0.3 mol%-doped ZrO2 exhibited the best charge transfer characteristics, which increased with PEC water splitting activity. The maximum photocurrent density and long-term photo-stability were achieved in the light on-off states.
Collapse
Affiliation(s)
- Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - I Neelakanta Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - V V N Harish
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
| | - Kakarla Raghava Reddy
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW, 2006, Australia
| | - Nagaraj P Shetti
- Department of Chemistry, K. L. E. Institute of Technology, Gokul, Hubballi, 580030, Affiliated to Visvesvaraya Technological University, Karnataka, India
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea.
| | - Tejraj M Aminabhavi
- Department of Pharmaceutical Engineering, Sonia College of Pharmacy, Dharwad, 580 002, Karnataka, India.
| |
Collapse
|
30
|
Hamdy MS, Berg O, Mul G. Size-tunable TiO2 nanoparticles in mesoporous silica: Size-dependent performance in selective photo-oxidation. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
31
|
Zhang K, Ganeev RA, Boltaev GS, Redkin PV, Krishnendu P, Guo C. Formation, aging and self-assembly of regular nanostructures from laser ablation of indium and zinc in water. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
32
|
Noman MT, Petru M, Militký J, Azeem M, Ashraf MA. One-Pot Sonochemical Synthesis of ZnO Nanoparticles for Photocatalytic Applications, Modelling and Optimization. MATERIALS (BASEL, SWITZERLAND) 2019; 13:E14. [PMID: 31861406 PMCID: PMC6981647 DOI: 10.3390/ma13010014] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/13/2019] [Accepted: 12/14/2019] [Indexed: 12/11/2022]
Abstract
This present study proposed a successful one pot synthesis of zinc oxide nanoparticles (ZnO NPs) and their optimisation for photocatalytic applications. Zinc chloride (ZnCl2) and sodium hydroxide (NaOH) were selected as chemical reagents for the proposed study. The design of this experiment was based on the reagents' amounts and the ultrasonic irradiations' time. The results regarding scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy confirmed the presence of ZnO NPs with pure hexagonal wurtzite crystalline structure in all synthesised samples. Photocatalytic activity of the developed samples was evaluated against methylene blue dye solution. The rapid removal of methylene blue dye indicated the higher photocatalytic activity of the developed samples than untreated samples. Moreover, central composite design was utilised for statistical analysis regarding the obtained results. A mathematical model for the optimisation of input conditions was designed to predict the results at any given point. The role of crystallisation on the photocatalytic performance of developed samples was discussed in detail in this novel study.
Collapse
Affiliation(s)
- Muhammad Tayyab Noman
- Department of Machinery Construction, Institute for Nanomaterials, Advanced Technologies and Innovation, Studentská 1402/2, Technical University of Liberec, 461 17 Liberec, Czech Republic;
- Department of Material Engineering, Faculty of Textile Engineering, Studentská 1402/2, Technical University of Liberec, 461 17 Liberec, Czech Republic; (J.M.); (M.A.)
| | - Michal Petru
- Department of Machinery Construction, Institute for Nanomaterials, Advanced Technologies and Innovation, Studentská 1402/2, Technical University of Liberec, 461 17 Liberec, Czech Republic;
| | - Jiří Militký
- Department of Material Engineering, Faculty of Textile Engineering, Studentská 1402/2, Technical University of Liberec, 461 17 Liberec, Czech Republic; (J.M.); (M.A.)
| | - Musaddaq Azeem
- Department of Material Engineering, Faculty of Textile Engineering, Studentská 1402/2, Technical University of Liberec, 461 17 Liberec, Czech Republic; (J.M.); (M.A.)
| | - Muhammad Azeem Ashraf
- Department of Fibre and Textile Technology, University of Agriculture, Faisalabad 38000, Pakistan;
| |
Collapse
|
33
|
Sun M, Kong W, Zhao Y, Liu X, Xuan J, Liu Y, Jia F, Yin G, Wang J, Zhang J. Improving Photocatalytic Degradation Activity of Organic Pollutant by Sn 4+ Doping of Anatase TiO 2 Hierarchical Nanospheres with Dominant {001} Facets. NANOMATERIALS 2019; 9:nano9111603. [PMID: 31718073 PMCID: PMC6915639 DOI: 10.3390/nano9111603] [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: 09/24/2019] [Revised: 10/25/2019] [Accepted: 11/02/2019] [Indexed: 12/18/2022]
Abstract
Herein, high-energy {001} facets and Sn4+ doping have been demonstrated to be effective strategies to improve the surface characteristics, photon absorption, and charge transport of TiO2 hierarchical nanospheres, thereby improving their photocatalytic performance. The TiO2 hierarchical nanospheres under different reaction times were prepared by solvothermal method. The TiO2 hierarchical nanospheres (24 h) expose the largest area of {001} facets, which is conducive to increase the density of surface active sites to degrade the adsorbed methylene blue (MB), enhance light scattering ability to absorb more incident photons, and finally, improve photocatalytic activity. Furthermore, the SnxTi1−xO2 (STO) hierarchical nanospheres are fabricated by Sn4+ doping, in which the Sn4+ doping energy level and surface hydroxyl group are beneficial to broaden the light absorption range, promote the generation of charge carriers, and retard the recombination of electron–hole pairs, thereby increasing the probability of charge carriers participating in photocatalytic reactions. Compared with TiO2 hierarchical nanospheres (24 h), the STO hierarchical nanospheres with 5% nSn/nTi molar ratio exhibit a 1.84-fold improvement in photodegradation of MB arising from the enhanced light absorption ability, increased number of photogenerated electron–hole pairs, and prolonged charge carrier lifetime. In addition, the detailed mechanisms are also discussed in the present paper.
Collapse
Affiliation(s)
- Meiling Sun
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Weichong Kong
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Yunlong Zhao
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Xiaolin Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Jingyue Xuan
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Yunyan Liu
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Fuchao Jia
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Guangchao Yin
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
| | - Jun Wang
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255000, China; (M.S.); (F.J.); (G.Y.)
- Correspondence: (J.W.); (J.Z.)
| | - Junkai Zhang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China
- Correspondence: (J.W.); (J.Z.)
| |
Collapse
|
34
|
Preparation of ternary ZnO/Ag/cellulose and its enhanced photocatalytic degradation property on phenol and benzene in VOCs. OPEN CHEM 2019. [DOI: 10.1515/chem-2019-0088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe ZnO/Ag/cellulose composite (ZAC) with excellent photocatalytic activity of degrading benzene and phenol in VOCs has been successfully synthesized. EDS, TEM, XPS and UV-vis analyses show that the ZAC is a ternary composite. It is composed of Ag, ZnO and cellulose, where the cellulose works as the substrate to anchor the other two components. The X-ray diffraction patterns find well-crystallized ZnO nanoparticles. Multiple PL peaks in the visible region measured for ZAC, imply rich defects on ZnO. It is observed that Ag nanoparticles are mainly attached on ZnO in the composite, which would raise the separation efficiency of photogenerated electrons and holes. Photocatalytic degradation shows that ZAC is able to decompose almost 100% phenol and 19% benzene in VOCs under UV light irradiation (6 W) which is almost no harm to human body. Due to the renewable cellulose, our ternary composite ZAC imparts low-cost, easily recycled and flexible merits, which might be applied in the indoor VOCs treatment.
Collapse
|