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Anh TM, Pham TD, Viet NM, Anh DTN, Cam NTD, Noi NV, Nhiem DN, Chau CN, Ha TTV, Phuong NM, Rene ER, Minh TD. Synthesis of CoWO 4/g-C 3N 4 Z-scheme heterojunction for the efficient photodegradation of diazinon with the addition of H 2O 2. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2023; 59:1-8. [PMID: 37966056 DOI: 10.1080/03601234.2023.2273773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Pesticides are on the list of substances that are routinely monitored by agencies and organizations in various natural environments and habitats. Diazinon (DZN) is the active ingredient in more than 20 agricultural pesticides, it causes the most damage and has been prohibited in many countries around the world. The final product CoWO4/g-C3N4 Z-scheme heterojunction was successfully synthesized in this work, where CoWO4 nanoparticles were deposited on the surface of g-C3N4. CoWO4/g-C3N4 structure allowed for the efficient separation of photo-generated electron-hole pairs, with electrons at the CoWO4 CB migrating to the g-C3N4 VB and preserving the electrons at the g-C3N4 CB and holes in the CoWO4 VB. The photodegradation efficiency of DZN using CoWO4/g-C3N4 Z-scheme heterojunction was investigated, as compared with its precursors, such as CoWO4, and g-C3N4. CoWO4/g-C3N4 Z-scheme heterojunction demonstrated the highest degradation capacity for DZN removal. Based on the results, the photocatalysis of the CoWO4/g-C3N4 Z-scheme heterojunction can be recycled for the effective removal of DZN by simple washing after three runs, proving the heterojunction's stability and suggesting CoWO4 as a promising material for the removal of DZN from contaminated water sources.
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Affiliation(s)
- Tran Minh Anh
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
| | - Thanh-Dong Pham
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
| | - Nguyen Minh Viet
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
- Key Lab of Advanced Material for Green Growth, VNU University of Science, Hanoi, Vietnam
| | - Dao Thi Ngoc Anh
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
| | | | - Nguyen Van Noi
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
- Key Lab of Advanced Material for Green Growth, VNU University of Science, Hanoi, Vietnam
| | - Dao Ngoc Nhiem
- Institute of Material Science, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Chu Ngoc Chau
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
| | | | - Nguyen Minh Phuong
- Faculty of Chemistry, Vietnam National University, VNU University of Science, Hanoi, Vietnam
| | - Eldon R Rene
- Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Delft, Netherlands
| | - Tran Dinh Minh
- Department of Education, Central Propaganda and Training Commission, Hanoi, Vietnam
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Teymourinia H, Alshamsi HA, Al-Nayili A, Gholami M. Photocatalytic degradation of chlorpyrifos using Ag nanoparticles-doped g-C 3N 5 decorated with dendritic CdS. CHEMOSPHERE 2023; 344:140325. [PMID: 37797896 DOI: 10.1016/j.chemosphere.2023.140325] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/07/2023]
Abstract
In this work, g-C3N5/CdS dendrite/AgNPs nanocomposite was synthesized using a mixed method consisting of hydrothermal, ultrasonic and chemistry reduction with sodium borohydride. The characterization of the as-prepared nanocomposite was done using infrared spectroscopy, X-ray, scanning electron microscopy, transmission electron microscopy, BET, and DRS methods was performed. The DRS results showed that the g-C3N5/CdS dendrite/AgNPs nanocomposite nanocomposite has a band gap of 1.08 eV. This band gap indicates the good capability of this nanocomposite as a photocatalyst. Accordingly, the photocatalytic degradation of chlorpyrifos (CPS) in was performed in an aqueous solution of the synthesized nanocomposite. The results showed that almost 95.3% of this poison, a concentration of 50 mg L-1 was degraded in the presence of 0.05 g L-1 of nanocomposite at pH = 5 in a 60 min. Hydroxide radicals and holes play a significant role in the photocatalytic process. The reusability of the nanocomposite with excellent performance in the degradation of photocatalytic toxins caused by the reduction in the electron-hole recombination and the high surface area of the nanocomposite are among the unique features of this work.
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Affiliation(s)
- Hakimeh Teymourinia
- Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, Zanjan, 45371-38791, Iran; Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791, Zanjan, Iran
| | - Hassan Abbas Alshamsi
- Department of Chemistry, College of Education, University of Al-Qadisiyah, Al Diwaniyah, Iraq
| | - Abbas Al-Nayili
- Department of Chemistry, College of Education, University of Al-Qadisiyah, Al Diwaniyah, Iraq
| | - Mitra Gholami
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
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A Brief Review of Photocatalytic Reactors Used for Persistent Pesticides Degradation. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6060089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pesticide pollution is a major issue, given their intensive use in the 20th century, which led to their accumulation in the environment. At the international level, strict regulations are imposed on the use of pesticides, simultaneously with the increasing interest of researchers from all over the world to find methods of neutralizing them. Photocatalytic degradation is an intensively studied method to be applied for the degradation of pesticides, especially through the use of solar energy. The mechanisms of photocatalysis are studied and implemented in pilot and semi-pilot installations on experimental platforms, in order to be able to make this method more efficient and to identify the equipment that can achieve the photodegradation of pesticides with the highest possible yields. This paper proposes a brief review of the impact of pesticides on the environment and some techniques for their degradation, with the main emphasis on different photoreactor configurations, using slurry or immobilized photocatalysts. This review highlights the efforts of researchers to harmonize the main elements of photocatalysis: choice of the photocatalyst, and the way of photocatalyst integration within photoreaction configuration, in order to make the transfer of momentum, mass, and energy as efficient as possible for optimal excitation of the photocatalyst.
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