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Zhang Y, Li K, Zang M, Cheng Y, Qi H. Graphene-based photocatalysts for degradation of organic pollution. CHEMOSPHERE 2023; 341:140038. [PMID: 37660797 DOI: 10.1016/j.chemosphere.2023.140038] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Compared with the traditional wastewater treatment technology, semiconductor photocatalysis is a rapidly emerging environment-friendly and efficient Advanced Oxidation Process for degradation of refractory organic contaminants. Single-component semiconductor photocatalysts exhibit poor photocatalytic performance and cannot meet the requirements of wastewater treatment. The combination of semiconductor photocatalysts and Graphene can effectively improve the photocatalytic activity and stability of semiconductor photocatalysts. This review focuses on the synergistic effect of several types of semiconductors with Graphene for photocatalytic degradation of organic pollutants. After a brief introduction of the photodegradation mechanism of semiconductor materials and the basic description of Graphene, the synthesis, characterization and degradation performance of various Graphene-based semiconductor photocatalysts are emphatically introduced.
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Affiliation(s)
- Yuxi Zhang
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Kuangjun Li
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Meng Zang
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China
| | - Yuanyuan Cheng
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China.
| | - Hongbin Qi
- School of Science, China University of Geosciences (Beijing), Beijing, 100083, PR China.
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Ma R, Xue Y, Ma Q, Chen Y, Yuan S, Fan J. Recent Advances in Carbon-Based Materials for Adsorptive and Photocatalytic Antibiotic Removal. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12224045. [PMID: 36432330 PMCID: PMC9694191 DOI: 10.3390/nano12224045] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 05/14/2023]
Abstract
Antibiotics have been a primary environmental concern due to their widespread dispersion, harmful bioaccumulation, and resistance to mineralization. Unfortunately, typical processes in wastewater treatment plants are insufficient for complete antibiotic removal, and their derivatives in effluent can pose a threat to human health and aquatic communities. Adsorption and photocatalysis are proven to be the most commonly used and promising tertiary treatment methods. Carbon-based materials, especially those based on graphene, carbon nanotube, biochar, and hierarchical porous carbon, have attracted much attention in antibiotic removal as green adsorbents and photocatalysts because of their availability, unique pore structures, and superior physicochemical properties. This review provides an overview of the characteristics of the four most commonly used carbonaceous materials and their applications in antibiotic removal via adsorption and photodegradation, and the preparation of carbonaceous materials and remediation properties regarding target contaminants are clarified. Meanwhile, the fundamental adsorption and photodegradation mechanisms and influencing factors are summarized. Finally, existing problems and future research needs are put forward. This work is expected to inspire subsequent research in carbon-based adsorbent and photocatalyst design, particularly for antibiotics removal.
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Tessema A, Wu CM, Motora KG. Highly Efficient Solar Light Driven g-C 3N 4@Cs 0.33WO 3 Heterojunction for the Photodegradation of Colorless Antibiotics. ACS OMEGA 2022; 7:38475-38486. [PMID: 36340061 PMCID: PMC9631413 DOI: 10.1021/acsomega.2c03675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
This study facilitates the synthesis of a graphitic carbon nitride/cesium tungsten oxide (g-C3N4@Cs0.33WO3) heterojunction using a solvothermal method. The photocatalytic activities of the prepared samples were examined for the photodegradation of colorless antibiotics, namely tetracycline, enrofloxacin, and ciprofloxacin, as well as cationic and anionic dyes, such as methyl orange, rhodamine B, neutral red, and methylene blue, under full-spectrum solar light. We have purposely selected different kinds of wastewater pollutants of colorless antibiotics and cationic and anionic organic dyes to investigate the potential application of this heterojunction toward different groups of water pollutants. The results revealed that the g-C3N4@Cs0.33WO3 heterojunction showed an outstanding photocatalytic activity toward all the pollutants with concentrations of 20 ppm each at pH 3 by photocatalytically removing 97% of tetracycline within 3 h, 98% of enrofloxacin within 2 h, 97% of ciprofloxacin within 2.25 h, 98% of methylene blue in 1 h, 99% of rhodamine B within 2 h, 99% of neutral red in 1.25 h, and 95% of methyl orange in 2 h. These findings indicate that the developed photocatalyst possesses excellent photocatalytic properties toward seven different water pollutants that make it a universal photocatalyst. The developed g-C3N4@Cs0.33WO3 oxide heterojunction also presented a photocatalytic performance better than those of reported solar light active photocatalysts for photodegradation of rhodamine B and tetracycline. The efficient photocatalytic performance of the heterojunction can be ascribed to its extended light-absorbing ability, effective charge separation and fast charge transfer properties, and a high surface area. Moreover, an active species detection experiment also confirmed that superoxide radicals, hydroxyl radicals, and holes played significant roles in the photocatalysis of the organic dyes and tetracycline.
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Shibu MC, Benoy MD, Shanavas S, Duraimurugan J, Suresh Kumar G, Abu Haija M, Maadeswaran P, Ahamad T, Van Le Q, Alshehri SM. Synthesis and characterization of SnO 2/rGO nanocomposite for an efficient photocatalytic degradation of pharmaceutical pollutant: Kinetics, mechanism and recyclability. CHEMOSPHERE 2022; 307:136105. [PMID: 35988770 DOI: 10.1016/j.chemosphere.2022.136105] [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: 05/17/2022] [Revised: 08/02/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
The SnO2 and SnO2/rGO nanostructures were successfully synthesized using the facile hydrothermal synthesis technique. The prepared nanostructures were well studied using different techniques such as XRD, XPS, UV-DRS, FT-IR, EDX, SEM and HR-TEM analysis. The crystalline nature of SnO2 and SnO2/rGO was confirmed by the XRD technique. The formation of highly pure SnO2 and SnO2/rGO nanostructures was confirmed by EDX analysis. The morphological results show the good agglomeration of several spherical nanoparticles. The optical properties were studied through the UV-DRS technique and the bandgap energies of SnO2 and SnO2/rGO are estimated to be 3.12 eV and 2.71 eV, respectively. The photocatalytic degradation percentage in presence of SnO2 and SnO2/rGO against RhB was found to be 96% and 98%, respectively. The degradation of TTC molecules was estimated as 90% and 88% with SnO2/rGO and SnO2, respectively. The degradation of both RhB and TTC molecules was well suited with the pseudo-first-order kinetics. The results of successive experiments clearly show the enhancement in the photocatalytic properties in the SnO2/rGO nanostructures.
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Affiliation(s)
- M C Shibu
- Research and Development Centre, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - M D Benoy
- Postgraduate & Research Department of Physics, Mar Athanasius College (Autonomous), Kothamangalam, 686 666, Kerala, India.
| | - S Shanavas
- Department of Chemistry, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - J Duraimurugan
- Department of Physics, K.S. Rangasamy College of Arts and Science (Autonomous), Tiruchengode, 637 215, Tamil Nadu, India
| | - G Suresh Kumar
- Department of Physics, K.S. Rangasamy College of Arts and Science (Autonomous), Tiruchengode, 637 215, Tamil Nadu, India
| | - Mohammad Abu Haija
- Department of Chemistry, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - P Maadeswaran
- Department of Energy Science and Technology, Periyar University, Salem, 636 011, Tamil Nadu, India
| | - T Ahamad
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Quyet Van Le
- Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, South Korea
| | - S M Alshehri
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
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