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Wang W, Liu Z, Nie H, Kong B. The direct Z-scheme character and roles of S vacancy in BiOCl/Bi 2S 3-(001) heterostructures for superior photocatalytic activity: a hybrid density functional investigation. Phys Chem Chem Phys 2024; 26:10723-10736. [PMID: 38512329 DOI: 10.1039/d3cp06297j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Given some current speculations and controversies regarding the type of BiOCl/Bi2S3-(001) heterostructure in experiments, it is of great importance to clarify these controversies and further explain the relevant experimental results. In this work, based on first-principles hybrid density functional calculations, it is verified that the BiOCl/Bi2S3-(001) heterostructure is a direct Z-scheme photocatalyst with high photo-generated carrier separation efficiency and strong redox ability that can react with O2 and OH- to produce photocatalytic active species of superoxide ions (˙O2-) and hydroxyl radicals (˙OH), respectively. This is consistent with the experimental findings and explains the excellent photocatalytic performance of the BiOCl/Bi2S3-(001) heterostructure in experiments. Besides, excitingly, it is found that the optical absorption, built-in electric field intensity, interlayer recombination probability, hydrogen evolution reaction ability, and the difference in electron-hole mobility are further enhanced via S vacancy introduction in BiOCl/Bi2S3-(001). Therefore, the significant roles of S vacancy in further improving the photocatalytic properties of the BiOCl/Bi2S3-(001) heterostructure are profoundly revealed. This work can provide valuable theoretical insights for designing the superior direct Z-scheme BiOCl/VS-Bi2S3-(001) heterostructure with promising photocatalytic properties.
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Affiliation(s)
- Wentao Wang
- Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China.
| | - Zuoyin Liu
- School of Physics and Astronomy, China West Normal University, Nanchong 637002, China.
| | - Hongwei Nie
- School of Physics and Astronomy, China West Normal University, Nanchong 637002, China.
| | - Bo Kong
- School of Physics and Astronomy, China West Normal University, Nanchong 637002, China.
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2
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Zhou Q, Ji Z, Yu H, Lu S, Guo J, Wu C. Photocatalytic Degradation of Tetracycline Hydrochloride Based on the Structure-Property Exploration of BiOCl. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7078-7086. [PMID: 38514080 DOI: 10.1021/acs.langmuir.4c00203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
The correlation between structure and properties in the photodegradation reaction of bismuth oxychloride (BiOCl) was explored in this work. Three BiOCl samples with different sizes, morphological structures, and defects were prepared through a hydrothermal method with experimental manipulation. Their structural properties were comprehensively characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, electron spin resonance, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, and photoluminescence. Taking the photodegradation of tetracycline hydrochloride (TC-HCl) as the probe reaction, we found that high activity could be achieved by decreasing their crystal size and thickness, introducing proper defects in the structure, and assembling the nanosheets to get microball structure. Combined with radical-scavenge experiments and electron spin resonance (ESR) spin-trap spectra, we conclude that ̇O2- was the dominant reactive oxygen species for the degradation reaction. The degradation detailed pathway of TC-HCl was further analyzed using liquid chromatography-mass spectrometry. This work explores the structure-property correlation of BiOCl and provides strategies for the rational design of active photocatalysts for water remediation.
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Affiliation(s)
- Quan Zhou
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Zhefeng Ji
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Hongbo Yu
- Institute of Materials, Ningbo University of Technology, Ningbo 315016, China
| | - Shun Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Jianzhong Guo
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Chunzheng Wu
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, College of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
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Ali ZSN, Okla MK, Kokilavani S, Abdel-Maksoud MA, Alatar AA, Sivaranjani PR, Al-Amri SS, Alaraidh IA, Khan SS. Unravelling the enhanced rifampicin photocatalytic degradation over green-synthesized SrO 2@SnIn 4S 8 p-n heterojunction: Pathway, toxicity evaluation and mechanistic insights. CHEMOSPHERE 2024; 352:141464. [PMID: 38364922 DOI: 10.1016/j.chemosphere.2024.141464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/23/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
In recent years, the discharge of pharmaceutical drugs into aquatic ecosystems has become a growing concern, posing a significant threat to aquatic life. In response to this environmental challenge, advanced oxidation processes have gained prominence in wastewater treatment due to their efficacy in eliminating pharmaceutical pollutants and their potential for reusability. In this study, we have fabricated SnIn4S8 coupled SrO2 nano-heterojunction (NH) using a greener co-precipitation approach using leaf extract derived from Acaphyla wilkesiana. The resulting NH exhibited exceptional photocatalytic activity against rifampicin (RIF), achieving a remarkable 97.4% degradation under visible light, surpassing the performance of its individual components. The morphological characteristics of the NH were thoroughly analyzed through SEM, TEM, XRD, and XPS techniques, while EIS, DRS, and BET techniques provided valuable insights into its photocatalytic and optical properties. Furthermore, radical scavenging assays and ESR analysis identified hydroxyl radicals (•OH) and superoxide radicals (O2•-) were the species contributing to the visible light-driven photocatalytic degradation. The study also elucidated the potential degradation pathways and intermediates of RIF through GC-MS analysis. Additionally, the toxicity of the produced intermediates was assessed using the ECOSAR model. The findings have significant implications for the treatment of pharmaceutical pollutants and underscore the importance of eco-friendly synthesis methods in addressing environmental challenges.
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Affiliation(s)
- Zareen Suhara Nazeer Ali
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mohammad K Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - S Kokilavani
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Mostafa A Abdel-Maksoud
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Abdulrahman A Alatar
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - P R Sivaranjani
- School of Engineering, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Saud S Al-Amri
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ibrahim A Alaraidh
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - S Sudheer Khan
- Department of Oral Medicine and Radiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, 600077, Tamil Nadu, India.
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Wang S, Song D, Liao L, Li M, Li Z, Zhou W. Surface and interface engineering of BiOCl nanomaterials and their photocatalytic applications. Adv Colloid Interface Sci 2024; 324:103088. [PMID: 38244532 DOI: 10.1016/j.cis.2024.103088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 11/29/2023] [Accepted: 01/07/2024] [Indexed: 01/22/2024]
Abstract
BiOCl materials have received much attention because of their unique optical and electrical properties. Still, their unsatisfactory catalytic performance has been troubling researchers, limiting the application of BiOCl-based photocatalysts. Therefore, many researchers have studied the adjustment of BiOCl-based materials to enhance photocatalytic efficiency. This review focuses on surface and interface engineering strategies for boosting the photocatalytic performance of BiOCl-based nanomaterials, including forming oxygen vacancy defects, constructing metal/BiOCl, and the fabrication of semiconductor/BiOCl nanocomposites. The photocatalytic applications of the above composites are also concluded in photodegradation of aqueous pollutants, photocatalytic NO removal, photo-induced H2 production, and CO2 reduction. Special emphasis has been given to the modification methods of BiOCl and photocatalytic mechanisms to provide a more detailed understanding for researchers in the fields of energy conversion and materials sciences.
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Affiliation(s)
- Shijie Wang
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China
| | - Dongxue Song
- School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China
| | - Lijun Liao
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
| | - Mingxia Li
- School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
| | - Zhenzi Li
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
| | - Wei Zhou
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China.
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Fu S, Chu Z, Huang Z, Dong X, Bie J, Yang Z, Zhu H, Pu W, Wu W, Liu B. Construction of Z-scheme AgCl/BiOCl heterojunction with oxygen vacancies for improved pollutant degradation and bacterial inactivation. RSC Adv 2024; 14:3888-3899. [PMID: 38283591 PMCID: PMC10811567 DOI: 10.1039/d3ra08514g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 01/16/2024] [Indexed: 01/30/2024] Open
Abstract
A facile Z-scheme AgCl/BiOCl heterojunction photocatalyst with oxygen vacancies was fabricated by a water-bath method. The structural, morphological, optical and electronic properties of as-synthesized samples were systematically characterized. The oxygen vacancies were confirmed by EPR, which could optimize the band-gap of the AgCl/BiOCl heterojunction and improve the photo-induced electron transfer. The optimized AgCl/BiOCl heterojunction showed excellent photocatalytic degradation efficiency (82%) for tetracycline (TC). Simultaneously, E. coli was completely inactivated within 60 min due to the AgCl/BiOCl heterojunction. The elevated catalytic activity of the optimal AgCl/BiOCl heterojunction was ascribed to the synergistic effect of the enhanced light absorption and effective photoinduced charge carrier separation and transfer. Moreover, the degradation efficiency of the AgCl/BiOCl heterojunction towards ofloxacin, norfloxacin and Lanasol Red 5B was 73%, 74% and 96%, respectively. The experimental factors for the degradation efficiency of TC were also studied. Furthermore, active species trapping experiments indicated that superoxide radicals (˙O2-) were the main reactive species, and the Z-scheme charge transfer mechanism helped to improve the photocatalytic activity.
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Affiliation(s)
- Shuai Fu
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
- Henan Engineering Research Center of Water Quality Safety in the Middle-lower Yellow River, Henan Green Technology Innovation Demonstration Base Luoyang 471023 Henan PR China
| | - Zhiliang Chu
- The 989th Hospital, Department of Central Laboratory Luoyang 471031 Henan PR China
| | - Zhiquan Huang
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
- Henan Engineering Research Center of Water Quality Safety in the Middle-lower Yellow River, Henan Green Technology Innovation Demonstration Base Luoyang 471023 Henan PR China
| | - Xiaomei Dong
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
| | - Junhong Bie
- Henan Communications Planning & Design Institute Co., Ltd Zhengzhou 450046 Henan PR China
| | - Zhe Yang
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
- Henan Engineering Research Center of Water Quality Safety in the Middle-lower Yellow River, Henan Green Technology Innovation Demonstration Base Luoyang 471023 Henan PR China
| | - Huijie Zhu
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
- Henan Engineering Research Center of Water Quality Safety in the Middle-lower Yellow River, Henan Green Technology Innovation Demonstration Base Luoyang 471023 Henan PR China
| | - Wanyu Pu
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
| | - Wanzhe Wu
- Henan International Joint Laboratory of New Civil Engineering Structure, College of Civil Engineering, Luoyang Institute of Science and Technology Luoyang 471023 Henan PR China
| | - Bo Liu
- Laboratory of Functional Molecular and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology Zibo 255000 Shandong PR China
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Mehralipour J, Akbari H, Adibzadeh A, Akbari H. Tocilizumab degradation via photo-catalytic ozonation process from aqueous. Sci Rep 2023; 13:22402. [PMID: 38104166 PMCID: PMC10725442 DOI: 10.1038/s41598-023-49290-z] [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: 11/03/2023] [Accepted: 12/06/2023] [Indexed: 12/19/2023] Open
Abstract
Following the advent of the coronavirus pandemic, tocilizumab has emerged as a potentially efficacious therapeutic intervention. The utilization of O3-Heterogeneous photocatalytic process (O3-HPCP) as a hybrid advanced oxidation technique has been employed for the degradation of pollutants. The present study employed a solvothermal technique for the synthesis of the BiOI-MOF composite. The utilization of FTIR, FESEM, EDAX, XRD, UV-vis, BET, TEM, and XPS analysis was employed to confirm the exceptional quality of the catalyst. the study employed an experimental design, subsequently followed by the analysis of collected data in order to forecast the most favorable conditions. The purpose of this study was to investigate the impact of several factors, including reaction time (30-60 min), catalyst dose (0.25-0.5 mg/L), pH levels (4-8), ozone concentration (20-40 mMol/L), and tocilizumab concentration (10-20 mg/L), on the performance of O3-HPCP. The best model was discovered by evaluating the F-value and P-value coefficients, which were found to be 0.0001 and 347.93, respectively. In the given experimental conditions, which include a catalyst dose of 0.46 mg/L, a reaction time of 59 min, a pH of 7.0, and an ozone concentration of 32 mMol/L, the removal efficiencies were found to be 92% for tocilizumab, 79.8% for COD, and 59% for TOC. The obtained R2 value of 0.98 suggests a strong correlation between the observed data and the predicted values, indicating that the reaction rate followed first-order kinetics. The coefficient of synergy for the degradation of tocilizumab was shown to be 1.22. The catalyst exhibited satisfactory outcomes, but with a marginal reduction in efficacy of approximately 3%. The sulfate ion (SO42-) exhibited no influence on process efficiency, whereas the nitrate ion (NO3-) exerted the most significant impact among the anions. The progress of the process was impeded by organic scavengers, with methanol exhibiting the most pronounced influence and sodium azide exerting the least significant impact. The efficacy of pure BiOI and NH2-MIL125 (Ti) was diminished when employed in their pure form state. The energy consumption per unit of degradation, denoted as EEO, was determined to be 161.8 KWh/m3-order.
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Affiliation(s)
- Jamal Mehralipour
- Health Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hesam Akbari
- Health Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Amir Adibzadeh
- Health Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, Faculty of Health, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hamed Akbari
- Health Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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7
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Tan W, Yang C, Huang Z, Li Z, Dou L. Fabrication of OVs enriched BiOCl microflowers doped with Fe 3+ for effective destruction of two typical contaminants. ENVIRONMENTAL TECHNOLOGY 2023:1-9. [PMID: 38100572 DOI: 10.1080/09593330.2023.2293676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/14/2023] [Indexed: 12/17/2023]
Abstract
In this study, a one-step solvothermal method was used to fabricate Fe3+ doped BiOCl microflowers with abundant oxygen vacancies (OVs) in the presence of glacial acetic acid. Various analytical techniques were employed to characterize the structural, morphological, and optical properties of the prepared samples. The presence of OVs was confirmed by low temperature electron paramagnetic resonance (EPR) analysis. The photocatalytic results show that Fe3+ doped BiOCl photocatalysts have higher activity than the bare BiOCl, and 10% Fe3+/BiOCl exhibits the highest photocatalytic performance, the photocatalytic efficiency of this sample is 2.3 and 1.1 times higher than that of the blank BiOCl toward photocatalytic degradation of perfluorooctanoic acid (PFOA) and rhodamine B (RhB), respectively. Furthermore, Fe3+ doped BiOCl demonstrates excellent reusability. Based on the experimental observations, an enhancement mechanism for the photocatalytic activity of Fe3+ doped BiOCl was reasonably elucidated.
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Affiliation(s)
- Wenyuan Tan
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
| | - Cuixian Yang
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
| | - Zhongyong Huang
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
| | - Zhongqu Li
- College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
| | - Lin Dou
- Key Laboratories of Fine Chemicals and Surfactants in Provincial Universities, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, People's Republic of China
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8
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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.
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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.
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Xie K, Hao W, Xu K, Xu S, Lin JB, Wei Z, Zhang J. Boosting the sonophotocatalytic performance of BiOCl by Eu doping: DFT and an experimental study. ULTRASONICS SONOCHEMISTRY 2023; 99:106543. [PMID: 37542753 PMCID: PMC10430592 DOI: 10.1016/j.ultsonch.2023.106543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/25/2023] [Accepted: 07/28/2023] [Indexed: 08/07/2023]
Abstract
Bismuth oxychloride (BiOCl) has a unique layered structure and uneven charge distribution, resulting in an internal electric field under polarization, which promotes the efficient separation and migration of photogenerated carriers. BiOCl could be a candidate for sonophotocatalysts. However, the low utilization of visible light limits the application of BiOCl in photocatalysts. In this study, the photocatalytic performance of rare earth element (Nd, Sm, Eu, Er and Er)-doped BiOCl was studied by density functional theory (DFT) and experimentally to screen high-performance catalysts. The band structure, density of states, and optical properties were calculated by the DFT method to predict the photocatalytic activity of rare earth-doped BiOCl. The built-in electric field formed in Eu-doped BiOCl inhibiting electron and hole recombination can be observed. Subsequently, the activity of the photocatalyst and sonophotocatalysts was evaluated. The results show that the photocatalytic and sonophotocatalytic activity of Eu-doped BiOCl is improved, which is consistent with the theoretical prediction. Combining theoretical calculations with experiments, the sonophotocatalytic activity of Eu-doped BiOCl is enhanced, mainly due to the synergistic effect of inhibiting carrier recombination, and expansion to the visible light absorption region.
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Affiliation(s)
- Kefeng Xie
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Wei Hao
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; China Oilfield Services Limited, Tianjin 300459, China
| | - Kai Xu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Shengyuan Xu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Jun-Bing Lin
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, China.
| | - Zheng Wei
- Henan Academy Institute of Traditional Chinese Medicine, Zhengzhou 45000, China
| | - Junping Zhang
- Henan Academy Institute of Traditional Chinese Medicine, Zhengzhou 45000, China.
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10
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Fu L, You S, Li G, Li X, Fan Z. Application of Semiconductor Metal Oxide in Chemiresistive Methane Gas Sensor: Recent Developments and Future Perspectives. Molecules 2023; 28:6710. [PMID: 37764486 PMCID: PMC10536930 DOI: 10.3390/molecules28186710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/13/2023] [Accepted: 09/17/2023] [Indexed: 09/29/2023] Open
Abstract
The application of semiconductor metal oxides in chemiresistive methane gas sensors has seen significant progress in recent years, driven by their promising sensitivity, miniaturization potential, and cost-effectiveness. This paper presents a comprehensive review of recent developments and future perspectives in this field. The main findings highlight the advancements in material science, sensor fabrication techniques, and integration methods that have led to enhanced methane-sensing capabilities. Notably, the incorporation of noble metal dopants, nanostructuring, and hybrid materials has significantly improved sensitivity and selectivity. Furthermore, innovative sensor fabrication techniques, such as thin-film deposition and screen printing, have enabled cost-effective and scalable production. The challenges and limitations facing metal oxide-based methane sensors were identified, including issues with sensitivity, selectivity, operating temperature, long-term stability, and response times. To address these challenges, advanced material science techniques were explored, leading to novel metal oxide materials with unique properties. Design improvements, such as integrated heating elements for precise temperature control, were investigated to enhance sensor stability. Additionally, data processing algorithms and machine learning methods were employed to improve selectivity and mitigate baseline drift. The recent developments in semiconductor metal oxide-based chemiresistive methane gas sensors show promising potential for practical applications. The improvements in sensitivity, selectivity, and stability achieved through material innovations and design modifications pave the way for real-world deployment. The integration of machine learning and data processing techniques further enhances the reliability and accuracy of methane detection. However, challenges remain, and future research should focus on overcoming the limitations to fully unlock the capabilities of these sensors. Green manufacturing practices should also be explored to align with increasing environmental consciousness. Overall, the advances in this field open up new opportunities for efficient methane monitoring, leak prevention, and environmental protection.
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Affiliation(s)
- Li Fu
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
- Research and Development Center, Siterwell Electronics Co., Ltd., Ningbo 315000, China; (G.L.); (Z.F.)
| | - Shixi You
- Research and Development Center, Siterwell Electronics Co., Ltd., Ningbo 315000, China; (G.L.); (Z.F.)
| | - Guangjun Li
- Research and Development Center, Siterwell Electronics Co., Ltd., Ningbo 315000, China; (G.L.); (Z.F.)
| | - Xingxing Li
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
| | - Zengchang Fan
- Research and Development Center, Siterwell Electronics Co., Ltd., Ningbo 315000, China; (G.L.); (Z.F.)
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