1
|
Boddepalli R, Gurugubelli TR, S V N P, Netheti VSB, Yusub S, Tamtam MR, Koutavarapu R, Pidaparthy LS. Efficiency and mechanistic insights of photocatalytic decomposition of tetracycline and rhodamine B utilizing Z-scheme g-C 3N 4/SnWO 4 heterostructures under visible light irradiation. ENVIRONMENTAL RESEARCH 2024; 254:119163. [PMID: 38759770 DOI: 10.1016/j.envres.2024.119163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/09/2024] [Accepted: 05/15/2024] [Indexed: 05/19/2024]
Abstract
The hydrothermal approach was used in the design and construction of the SnWO4 (SW) nanoplates anchored g-C3N4 (gCN) nanosheet heterostructures. Morphology, optical characteristics, and phase identification were investigated. The heterostructure architect construction and successful interface interaction were validated by the physicochemical characteristics. The test materials were used as a photocatalyst in the presence of visible light to break down the antibiotic tetracycline (TC) and the organic Rhodamine B (RhB). The best photocatalytic degradation efficiency of TC (97%) and RhB (98%) pollutants was demonstrated by the optimized 15 mg of gCNSW-7.5 in 72 and 48 min, respectively, at higher rate constants of 0.0409 and 0.0772 min-1. The interface contact between gCN and SW, which successfully enhanced charge transfer and restricted recombination rate in the photocatalyst, is responsible for the enhanced performance of the gCNSW heterostructure photocatalyst. In addition, the gCNSW heterostructure photocatalyst demonstrated exceptional stability and reusability over the course of four successive testing cycles, highlighting its durable and dependable function. Superoxide radicals and holes were shown to be key players in the degradation of contaminants through scavenger studies. The charge transfer mechanism in the heterostructure is identified as Z-scheme mode with the help of UV-vis DRS analysis. Attributed to its unique structural features, and effective separation of charge carriers, the Z-scheme gCNSW-7.5 heterostructure photocatalyst exhibits significant promise as an exceptionally efficient catalyst for the degradation of pollutants. This positions it as a prospective material with considerable potential across various environmental applications.
Collapse
Affiliation(s)
- Ramu Boddepalli
- Department of Physics, Andhra University, Visakhapatnam, 530 003, Andhra Pradesh, India
| | | | - Pammi S V N
- Department of Physics, School of Sciences, SR University, Warangal, 506 371, Telangana, India
| | - V S Bhagavan Netheti
- Department of Physics, Dr. VS Krishna Govt. Degree College (Autonomous), Visakhapatnam, 530 013, Andhra Pradesh, India
| | - S Yusub
- Freshman Engineering Department, Lakireddy Bali Reddy College of Engineering (Autonomous), Mylavaram, 521 230, Andhra Pradesh, India
| | - Mohan Rao Tamtam
- Data Science Lab, Department of Information and Communication Engineering, College of Mechanical and IT Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
| | - Ravindranadh Koutavarapu
- Physics Division, Department of Basic Sciences and Humanities, GMR Institute of Technology, Rajam, 532 127, Andhra Pradesh, India.
| | - Lalitha Saranya Pidaparthy
- Department of Physics, Andhra University, Visakhapatnam, 530 003, Andhra Pradesh, India; Department of Physics, Visakha Govt. Degree College (W), Visakhapatnam, 530 020, Andhra Pradesh, India.
| |
Collapse
|
2
|
Chen D, Gong K, Xu X, Huang C, Lei P. Enhancing the adsorption-photocatalytic efficiency of BiOBr for Congo red degradation by tuning the surface charge and bandgap via an Y 3+-I - co-doping strategy. Phys Chem Chem Phys 2024; 26:17155-17170. [PMID: 38847473 DOI: 10.1039/d4cp00876f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Metal-ion doping and halogen substitution have been largely applied to tune the bandgap of bismuth oxybromide (BiOBr) to upgrade its photodegradation capacity. In this work, the adsorption capacity and photocatalytic behavior of solvothermally synthesized BiOBr photocatalysts can be optimized via the synergistic effect of Y3+- and I--doping. After an adsorption reaction in the dark and exposure for another 80 min to visible light, pure BiOBr can remove 46.5% of Congo red (CR) from water with an initial CR concentration of 50 mg L-1. Meanwhile, Bi0.8Y0.20OBr0.97I0.03, the co-doped catalyst, displays total degradation rates exceeding 98% and 92% with CR dosages of 50 and 100 mg L-1, respectively, demonstrating a doubled degradation capacity. With the co-doping solution, the negative charges on the catalysts reduce, more oxygen vacancies are generated, the bandgap remarkably narrows, and the photoabsorption range broadens for derivation of photoinduced electron-hole pairs. The mechanism for optimized photodegradation behavior and dramatically increased adsorption capacity are discussed based on analyses of the structural evolution, surface properties including the chemical state and surface charge, electrochemical performance and the yield/type of photogenerated species. Density functional theory (DFT) simulations were conducted to investigate the structural state, density of states (DOS) and electrostatic potential.
Collapse
Affiliation(s)
- Dongsheng Chen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Keqian Gong
- State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Xiangyang Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
- Hunan Key Laboratory of Mineral Materials and Applications, Changsha 410083, China
| | - Chenyu Huang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| | - Pengtao Lei
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
| |
Collapse
|
3
|
Ghamarpoor R, Fallah A, Jamshidi M. A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO 2-Based Photocatalysts for Photodegradation of Contaminants. ACS OMEGA 2024; 9:25457-25492. [PMID: 38911730 PMCID: PMC11191136 DOI: 10.1021/acsomega.3c08717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/25/2024]
Abstract
The environment being surrounded by accumulated durable waste organic compounds has become a critical crisis for human societies. Generally, organic effluents of industrial plants released into the water source and air are removed by some physical and chemical processes. Utilizing photocatalysts as cost-effective, accessible, thermally/mechanically stable, nontoxic, reusable, and powerful UV-absorber compounds creates a new gateway toward the removal of dissolved, suspended, and gaseous pollutants even in trace amounts. TiO2 and ZnO are two prevalent photocatalysts in the field of removing contaminants from wastewater and air. Structural modification of the photocatalysts with metals, nonmetals, metal ions, and other semiconductors reduces the band gap energy and agglomeration and increases the affinity toward organic compounds in the composite structures to expand their usability on an industrial scale. This increases the extent of light absorbance and improves the photocatalytic efficiency. Selecting a suitable synthesis method is necessary to prepare a target photocatalyst with distinct properties such as high specific surface area, numerous surface functional groups, and an appropriate crystalline phase. In this Review, significant parameters for the synthesis and modification of TiO2- and ZnO-based photocatalysts are discussed in detail. Several proposed mechanistic routes according to photocatalytic composite structures are provided. Some electrochemical analyses using charge carrier trapping agents and delayed recombination help to plot mechanistic routes according to the direction of photoexcited species (electron-hole pairs) and design more effective photocatalytic processes in terms of cost-effective photocatalysts, saving time and increasing productivity.
Collapse
Affiliation(s)
- Reza Ghamarpoor
- Department
of Petroleum Engineering, Faculty of Engineering, University of Garmsar, Garmsar 3588115589, Iran
- Constructional
Polymers and Composites Research Lab, School of Chemical, Petroleum
and Gas Engineering, Iran University of
Science and Technology (IUST), Tehran 1311416846, Iran
| | - Akram Fallah
- Department
of Chemical Technologies, Iranian Research
Organization for Science and Technology (IROST), Tehran 3313193685, Iran
| | - Masoud Jamshidi
- Constructional
Polymers and Composites Research Lab, School of Chemical, Petroleum
and Gas Engineering, Iran University of
Science and Technology (IUST), Tehran 1311416846, Iran
| |
Collapse
|
4
|
Song Y, Long A, Ge X, Bao Z, Meng M, Hu S, Gu Y. Construction of floatable flower-like plasmonic Bi/BiOCl-loaded hollow kapok fiber photocatalyst for efficient degradation of RhB and antibiotics. CHEMOSPHERE 2023; 343:140240. [PMID: 37739132 DOI: 10.1016/j.chemosphere.2023.140240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 09/24/2023]
Abstract
The development of low-cost and high-efficiency photocatalysts for the degradation of organic pollutants has been an essential and feasible approach to environmental remediation. However, conventional powder photocatalysts suffer from agglomeration, limited light utilization, and reuse difficulties, which hinder their large-scale practical application. Herein, a floatable flower-like plasmonic Bi/BiOCl-loaded hollow kapok fiber (KF/Bi/BC) photocatalyst was synthesized by a facile solvothermal method. It exhibited excellent photocatalytic degradation of Rhodamine B (RhB), ofloxacin (OFX), and tetracycline (TC) under UV-vis irradiation. The incorporation of metallic Bi not only greatly enhanced the light absorption of BiOCl in the visible region but also served as an effective "electron trap", facilitating the efficient separation and transfer of photogenerated electrons and holes. Furthermore, the remarkable floatability of the catalyst contributed to increased light utilization and facilitated the recycling of the catalyst. This work provided a convenient, effective, and feasible method for the fabrication of floatable photocatalysts with excellent catalytic properties, and has great potential for practical applications.
Collapse
Affiliation(s)
- Yankai Song
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Anchun Long
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Xianlong Ge
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Zongqi Bao
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Minfeng Meng
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Shaohua Hu
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China
| | - Yingying Gu
- School of Materials and Chemistry. University of Shanghai for Science and Technology, Address: No. 516, Jungong Road, Shanghai, 200093, PR China.
| |
Collapse
|
5
|
Nadikatla SK, Chintada VB, Gurugubelli TR, Koutavarapu R. Review of Recent Developments in the Fabrication of ZnO/CdS Heterostructure Photocatalysts for Degradation of Organic Pollutants and Hydrogen Production. Molecules 2023; 28:molecules28114277. [PMID: 37298752 DOI: 10.3390/molecules28114277] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/17/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Researchers have recently paid a lot of attention to semiconductor photocatalysts, especially ZnO-based heterostructures. Due to its availability, robustness, and biocompatibility, ZnO is a widely researched material in the fields of photocatalysis and energy storage. It is also environmentally beneficial. However, the wide bandgap energy and quick recombination of the photoinduced electron-hole pairs of ZnO limit its practical utility. To address these issues, many techniques have been used, such as the doping of metal ions and the creation of binary or ternary composites. Recent studies showed that ZnO/CdS heterostructures outperformed bare ZnO and CdS nanostructures in terms of photocatalytic performance when exposed to visible light. This review largely concentrated on the ZnO/CdS heterostructure production process and its possible applications including the degradation of organic pollutants and hydrogen evaluation. The importance of synthesis techniques such as bandgap engineering and controlled morphology was highlighted. In addition, the prospective uses of ZnO/CdS heterostructures in the realm of photocatalysis and the conceivable photodegradation mechanism were examined. Lastly, ZnO/CdS heterostructures' challenges and prospects for the future have been discussed.
Collapse
Affiliation(s)
- Santhosh Kumar Nadikatla
- Chemistry Division, Department of Basic Sciences and Humanities, GMR Institute of Technology, Rajam 532127, Andhra Pradesh, India
| | - Vinod Babu Chintada
- Department of Mechanical Engineering, GMR Institute of Technology, Rajam 532127, Andhra Pradesh, India
| | - Thirumala Rao Gurugubelli
- Physics Division, Department of Basic Sciences and Humanities, GMR Institute of Technology, Rajam 532127, Andhra Pradesh, India
| | - Ravindranadh Koutavarapu
- Department of Robotics Engineering, College of Mechanical and IT Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| |
Collapse
|