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Liu K, Ran MJ, Li ZR, Huang YF, Jiang ZY, Li WY, Khojiev S, Hu ZY, Chen LH, Liu J, Li Y, Su BL. CdS QDs grown on ellipsoidal BiVO 4 for efficient photocatalytic degradation of tetracycline. Dalton Trans 2024; 53:8011-8019. [PMID: 38651951 DOI: 10.1039/d4dt00586d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Designing efficient, inexpensive, and stable photocatalysts to degrade organic pollutants and antibiotics has become an effective way for environmental remediation. In this work, we successfully performed in situ growth of CdS QDs on the surface of elliptical BiVO4 to try to show the advantage of the binary heterojuncted photocatalyst (BVO@CdS) for the photocatalytic degradation of tetracycline (TC). The In situ growth of CdS QDs can provide a large number of reactive sites and also generate a larger contact area with BiVO4. In addition, compared with mechanical composite materials, in situ growth can significantly reduce the energy barrier at the interface between BiVO4 and CdS, providing more channels for the separation and migration of photogenerated charge carriers, and further improving reaction activity. As a result, BVO@CdS-0.05 shows the best degradation efficiency, with a degradation rate of 88% after 30 min under visible light. The TC photodegradation follows a pseudo-second-order reaction with a dynamic constant of 0.472 min-1, which is 6.47 times that of pure BiVO4, 7.24 times that of pure CdS QDs and 2 times that of the mechanical composite. The degradation rate of BVO@CdS-0.05 decreases to 77.8% with a retention rate of 88.5% after four cycles, demonstrating excellent stability. Through liquid chromatography-mass spectrometry (LC-MS) analysis, two possible pathways for TC degradation are proposed. Through free radical capture experiments, electron spin resonance measurements, and photoelectrochemical comprehensive analysis, it is confirmed that BVO@CdS composites have constructed an efficient Z-scheme heterojunction via in situ growth, thereby highly enhancing the separation and transport efficiency of charge carriers.
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Affiliation(s)
- Kai Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Mao-Jin Ran
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
- Nanostructure Research Centre (NRC), Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China
| | - Zhi-Rong Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
- Nanostructure Research Centre (NRC), Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China
| | - Yi-Fu Huang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Ze-Yu Jiang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Wan-Ying Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Shokir Khojiev
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
- Center for Advanced Technology under Agency for Innovative Development of the Republic of Uzbekistan, The Ministry of Higher Education, Science and Innovation, University Street, 3A, 100174 Tashkent, Uzbekistan
| | - Zhi-Yi Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
- Nanostructure Research Centre (NRC), Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China
| | - Li-Hua Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Jing Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Yu Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, China.
- Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, 61 rue de Bruxelles, B-5000 Namur, Belgium
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Adekoya JA, Chibuokem MO, Masikane S, Revaprasadu N. Heterostructures of Ag2FeSnS4 chalcogenide nanoparticles as potential photocatalysts. SCIENTIFIC AFRICAN 2023. [DOI: 10.1016/j.sciaf.2022.e01509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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3
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Zhao Y, Dang P, Gao Y, Li Y, Xie H, Yang C. Double Z-scheme Co 3O 4/Bi 4O 7/Bi 2O 3 composite activated peroxymonosulfate to efficiently degrade tetracycline under visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:79184-79198. [PMID: 35708803 DOI: 10.1007/s11356-022-21359-8] [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: 12/14/2021] [Accepted: 06/04/2022] [Indexed: 06/15/2023]
Abstract
Co3O4/Bi4O7/Bi2O3 (CBB) composites were prepared, in which Co3O4 was synthesized from Co-MOF as precursor. The peroxymonosulfate (PMS) activated by CBB catalyst under visible light was used to degrade tetracycline (TC). Owing to the synergistic effect of photocatalysis and PMS activation, 98.4% of TC was removed within 60 min. The optimal loading of Co3O4 was determined, and the influence of PMS dosage, initial pH, and disturbing anions on the degradation effect were investigated. The "CBB + Vis + PMS" system showed good reusability, and the degradation was only reduced by 1.7% after 5 cycles. This system also had a good degradation of other five pollutants. The quenching experiment showed that holes (h+), superoxide radicals (·O2-), and singlet oxygen (1O2) were the main active species. The degradation products of TC were determined by liquid chromatography-mass spectrometry, and the degradation pathway was proposed. Finally, a double Z-scheme degradation mechanism was proposed in the "CBB + Vis + PMS" system. The peroxymonosulfate activated by CBB under visible light to degrade organic pollutants has widespread application prospects in environmental remediation.
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Affiliation(s)
- Yajuan Zhao
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Pu Dang
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Yaqian Gao
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Yan Li
- Library, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
| | - Huidong Xie
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China.
- Xi'an Key Laboratory of Clean Energy, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China.
| | - Chang Yang
- Division of Laboratory and Equipment Management, Xi'an University of Architecture and Technology, Xi'an, 710055, Shaanxi, China
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Liaqat M, Riaz KN, Iqbal T, Nabi G, Rizwan M, Shakil M. Fabrication of novel BiVO 4/Bi 2O 3heterostructure with superior visible light induced photocatalytic properties. NANOTECHNOLOGY 2022; 34:015711. [PMID: 36195011 DOI: 10.1088/1361-6528/ac9738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Heterostructure BiVO4/Bi2O3nanocomposites with enhanced visible light activity are effectively synthesized through an easiest and single step hydrothermal route, using bismuth subnitrate and ammonium meta-vanadate as main raw materials in existence of citric acid. The phase and surface structure, topography and optical properties of synthesized composites are characterized by XRD, SEM, EDX, FTIR, UV-Visible and PL spectroscopy. It was found that 5%BiVO4/Bi2O3(BOBV-5) nanocomposite exhibit excellent photocatalytic performance for rhodamine B dye degradation and tetracyclic under irradiation of visible light as compared to single component i.e. BiVO4. The increased photocatalytic activity should be ascribed for making p-n heterojunction among p-type Bi2O3and n-type BiVO4. This p-n heterojunction successfully reduce the recombination of photogenerated charge carriers. Furthermore, the BOBV-5 novel photocatalyst shows good stability in constructive five cycles and photocatalytic activity is best for conquering photo corrosion of a photocatalysts. To explain charge migration route, whole photocatalytic mechanism was described in terms of energy band structures. Furthermore, the present work is helpful effort for design of new visible light photocatalytic materials with heterojunction structures.
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Affiliation(s)
- Maira Liaqat
- Department of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat, 50700, Pakistan
| | | | - Tahir Iqbal
- Department of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat, 50700, Pakistan
| | - Ghulam Nabi
- Department of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat, 50700, Pakistan
| | - Muhammad Rizwan
- School of Physical Sciences, University of the Punjab, Lahore, Pakistan
| | - M Shakil
- Institute of Physics, The Islamia University of Bahawalpur, Pakistan
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Babu AT, Antony R. Binary metal oxide nanocomposites of Fe, Co and Mn with SnO2 for photodegradation of dyes, catalytic reduction of 4-nitrophenol and antimicrobial activities. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-021-02125-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Zare EN, Iftekhar S, Park Y, Joseph J, Srivastava V, Khan MA, Makvandi P, Sillanpaa M, Varma RS. An overview on non-spherical semiconductors for heterogeneous photocatalytic degradation of organic water contaminants. CHEMOSPHERE 2021; 280:130907. [PMID: 34162104 DOI: 10.1016/j.chemosphere.2021.130907] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/01/2021] [Accepted: 05/12/2021] [Indexed: 06/13/2023]
Abstract
Because of their carcinogenicity and mutagenicity, the elimination of organic contaminants from surface and subsurface water is a subject of environmental significance. Conventional water decontamination approaches such as membrane separation, ultrafiltration, adsorption, reverse osmosis, coagulation, etc., have relatively higher operating costs and can generate highly toxic secondary contaminants. On the other hand, heterogeneous photocatalysis, an advanced oxidation process (AOP), is considered a clean and cost-effective process for organic pollutants degradation. Owing to their distinctive structure and physicochemical properties non-spherical semiconductors have gained considerable limelight in the photocatalytic degradation of organic contaminants. The current review briefly introduces a wide range of organic water contaminants. Recent advances in non-spherical semiconductor assembly and their photocatalytic degradation applications are highlighted. The underlying mechanism, fundamentals of photocatalytic reactions, and the factors affecting the degradation performance are also alluded including the current challenges and future research perspectives.
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Affiliation(s)
| | - Sidra Iftekhar
- Department of Applied Physics, University of Eastern Finland, Kuopio, 70210, Finland
| | - Yuri Park
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Jessy Joseph
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Varsha Srivastava
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Moonis Ali Khan
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Pooyan Makvandi
- Center for Materials Interfaces, Istituto Italiano di Tecnologia (IIT), Viale R. Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Mika Sillanpaa
- Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
| | - Rajender S Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Šlechtitelů 27, 783 71, Olomouc, Czech Republic.
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Zheng J, Zhang L. One-step in situ formation of 3D hollow sphere-like V 2O 5 incorporated Ni 3V 2O 8 hybrids with enhanced photocatalytic performance. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125934. [PMID: 34492863 DOI: 10.1016/j.jhazmat.2021.125934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/08/2021] [Accepted: 04/17/2021] [Indexed: 06/13/2023]
Abstract
3-D hollow sphere-like Ni3V2O8 immobilizing V2O5 nanoparticles were successfully synthesized via in situ recrystallization method without any template. The compact contact between V2O5 and Ni3V2O8 ensuring the photo-inducted carriers fast transport, which would be beneficial for inhibiting recombination rate of electron-hole (e-/h+) pairs. Moreover, the hollow sphere-like structure composed of the smaller nanoparticle could effectively improve of visible light capture capacity (multiple scattering for hollow architectures). Benefiting the synergistic promoting effect of the suitable heterojunction and the fascinating 3D hollow feature, the V2O5@Ni3V2O8 indicated significantly degradation performance when evaluated as photocatalyst for degradation antibiotics and chlorophenols under visible light irradiation. Impressively, the 2-V2O5@Ni3V2O8 heterojunction deliver the optimal degradation efficiency for TC (OTC) and 2,4-DCP (4-CP) were 90.0% (~91.2%) and 92.6% (~90.0%), respectively. The appearance mechanism for the enhancement photocatalytic performance was also elucidated in detail. The facile strategy provides a novel insight into the designing of the photocatalyst with advantages of charges separation and light-harvesting for degradation of contaminants in wastewater.
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Affiliation(s)
- Jianhua Zheng
- College of Chemistry, Liaoning University, Shenyang 110036, China; College of Light Industry and Textiles, Qiqihar University, Heilongjiang 161006, China
| | - Lei Zhang
- College of Chemistry, Liaoning University, Shenyang 110036, China.
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Cong Y, Zhang W, Ding W, Zhang T, Zhang Y, Chi N, Wang Q. Fabrication of electrochemically-modified BiVO 4-MoS 2-Co 3O 4composite film for bisphenol A degradation. J Environ Sci (China) 2021; 102:341-351. [PMID: 33637259 DOI: 10.1016/j.jes.2020.09.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 06/12/2023]
Abstract
A new electrochemically-modified BiVO4-MoS2-Co3O4 (represented as E-BiVO4-MoS2-Co3O4) thin film electrode was successfully synthesized for environmental application. MoS2 and Co3O4 were grown on the surface of BiVO4 to obtain BiVO4-MoS2-Co3O4. E-BiVO4-MoS2-Co3O4 film was achieved by further electrochemical treatment of BiVO4-MoS2-Co3O4. The as-prepared E-BiVO4-MoS2-Co3O4 exhibited significantly enhanced photoelectrocatalytic activity. The photocurrent density of E-BiVO4-MoS2-Co3O4 thin film is 6.6 times that of BiVO4 under visible light irradiation. The degradation efficiency of E-BiVO4-MoS2-Co3O4 for bisphenol A pollutant was 81.56% in photoelectrochemical process. The pseudo-first order reaction rate constant of E-BiVO4-MoS2-Co3O4 film is 3.22 times higher than that of BiVO4. And its reaction rate constant in photoelectrocatalytic process is 14.5 times or 2 times that in photocatalytic or electrocatalytic process, respectively. The improved performance of E-BiVO4-MoS2-Co3O4 was attributed to the synergetic effects of the reduction of interfacial charge transfer resistance, the formation of oxygen vacancies and sub-stoichiometric metal oxides and higher separation efficiency of photogenerated electron-hole pairs. E-BiVO4-MoS2-Co3O4 is a promising composite material for pollutants removal.
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Affiliation(s)
- Yanqing Cong
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; Institute of Urban Aquatic Environment, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Wenhua Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Wenchen Ding
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Tongtong Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Yi Zhang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; Institute of Urban Aquatic Environment, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Nianping Chi
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Qi Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China; Institute of Urban Aquatic Environment, Zhejiang Gongshang University, Hangzhou 310018, China.
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Guo J, Shen CH, Sun J, Xu XJ, Li XY, Fei ZH, Liu ZT, Wen XJ. Highly efficient activation of peroxymonosulfate by Co3O4/Bi2MoO6 p-n heterostructure composites for the degradation of norfloxacin under visible light irradiation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118109] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Sun J, Shen CH, Guo J, Guo H, Yin YF, Xu XJ, Fei ZH, Liu ZT, Wen XJ. Highly efficient activation of peroxymonosulfate by Co 3O 4/Bi 2WO 6 p-n heterojunction composites for the degradation of ciprofloxacin under visible light irradiation. J Colloid Interface Sci 2020; 588:19-30. [PMID: 33387821 DOI: 10.1016/j.jcis.2020.12.043] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 01/24/2023]
Abstract
Photocatalytic technology assisted via peroxymonosulfate (PMS) has good potential in water treatment. In this study, the Co3O4/Bi2WO6 composite was constructed via an in-situ calcination process and used to activate PMS for the degradation of ciprofloxacin (CIP) under visible light irradiation. The obtained 5 wt% Co3O4/Bi2WO6(CBWO-2) can highly effectively remove 86.2% CIP within 5 min visible light irradiation in presence of PMS. The excellent degradation performance of Co3O4/Bi2WO6/PMS system can be attributed to the synergistic effect between p-n heterojunction and PMS activation. The conduction band and valence band deviation between Co3O4 and Bi2WO6 were calculated by XPS techniques. Besides, DFT calculations were performed to further confirm the internal structure between Co3O4 and Bi2WO6. This work not only provides an approach to fabricate heterostructures but also indicated that Co3O4/Bi2WO6/PMS/Vis system is a potential environment remediation alternative for the efficient removal of recalcitrant organic compounds from wastewaters.
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Affiliation(s)
- Jie Sun
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Chun-Hui Shen
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Jie Guo
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - He Guo
- College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Yi-Fei Yin
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Xin-Jie Xu
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Zheng-Hao Fei
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Zong-Tang Liu
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China
| | - Xiao-Ju Wen
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China.
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Hermans Y, Olivier C, Junge H, Klein A, Jaegermann W, Toupance T. Sunlight Selective Photodeposition of CoO x(OH) y and NiO x(OH) y on Truncated Bipyramidal BiVO 4 for Highly Efficient Photocatalysis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53910-53920. [PMID: 33207876 DOI: 10.1021/acsami.0c14624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Facet-engineered monoclinic scheelite BiVO4 particles decorated with various cocatalysts were successfully synthesized by selective sunlight photodeposition of metal or metal oxy(hydroxide) nanoparticles onto the facets of truncated bipyramidal BiVO4 monoclinic crystals coexposing {010} and {110} facets. X-ray photoelectron spectroscopy, scanning electron microscopy, and scanning Auger microscopy revealed that metallic silver (Ag) and cobalt (oxy)hydroxide (CoOx(OH)y) particles were selectively deposited onto the {010} and {110} facets, respectively, regardless of the cocatalyst amount. By contrast, the nickel (oxy)hydroxide (NiOx(OH)y) photodeposition depends on the nickel precursor amount with an unprecedented selectivity for 0.1 wt % NiOx(OH)y/BiVO4 with a preferential deposition onto the {010} facets and the edges between the {110} facets. Moreover, these noble metal-free heterostructures led to remarkable photocatalytic properties for rhodamine B photodecomposition and sacrificial water oxidation reactions. For instance, 0.2 wt % CoOx(OH)y/BiVO4 led to one of the highest oxygen evolution rates, i.e., 1538 μmol h-1 g-1, ever described which is ten times higher than that found for bare BiVO4. The selective deposition of cobalt (oxy)hydroxide species onto the more electron-deficient facet of truncated bipyramidal monoclinic BiVO4 particles favors photogenerated charge carrier separation and therefore plays a key role for efficient photochemical oxygen evolution.
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Affiliation(s)
- Yannick Hermans
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33 405 Talence, France
- Fachbereich Material- und Geowissenshaften, Technische Universität Darmstadt, Petersenstr. 23, 64287 Darmstadt, Germany
| | - Céline Olivier
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33 405 Talence, France
| | - Henrik Junge
- Leibniz Institute for Catalysis, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
| | - Andreas Klein
- Fachbereich Material- und Geowissenshaften, Technische Universität Darmstadt, Petersenstr. 23, 64287 Darmstadt, Germany
| | - Wolfram Jaegermann
- Fachbereich Material- und Geowissenshaften, Technische Universität Darmstadt, Petersenstr. 23, 64287 Darmstadt, Germany
| | - Thierry Toupance
- Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux, 351 Cours de la Libération, 33 405 Talence, France
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Bismuth vanadate in photoelectrocatalytic water treatment systems for the degradation of organics: A review on recent trends. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114724] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Malefane ME. Co 3O 4/Bi 4O 5I 2/Bi 5O 7I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation. ACS OMEGA 2020; 5:26829-26844. [PMID: 33111009 PMCID: PMC7581276 DOI: 10.1021/acsomega.0c03881] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 10/02/2020] [Indexed: 05/29/2023]
Abstract
Remediation of organic pollutant matrixes from wastewater by photodegradation using different heterojunctions is extensively studied to improve performance for potential application. Brilliant black (BB) and p-nitrophenol (PNP) have been detected in the environment and implicated as directly or indirectly carcinogenic to human health. This work analyzes their elimination from aqueous solutions under visible-light irradiation with composites of cobalt(II, III) oxide and bismuth oxyiodides (Co3O4/Bi4O5I2/Bi5O7I). The synthesized nanomaterial properties were investigated using various techniques such as BET, SEM/EDS, TEM, XRD, FTIR, PL, and UV-vis. All the nanocomposites absorbed in the visible range of the solar spectrum with band gaps between 1.68 and 2.79 eV, and the specific surface area of the CB2 composite increased by 35.8% from that of Bi4O5I2/Bi5O7I. There was an observed massive reduction in the rate of electron and hole recombination, and the band gaps of the composites decreased. The mineralization of PNP and BB was followed by determination of the total organic carbon with reductions of 93.6 and 83.7%, respectively. The main active species were the hydroxyl radicals, while the superoxide anion radical and generated holes were minor as confirmed by radical trapping experiments. The optimum pHs for degradation of PNP and BB were 9.6 and 5.3, respectively. The enhanced performance of the catalyst was due to C-scheme heterojunction formation that reduced the electron and hole recombination rate and was attributed to strong adsorption of the pollutants on the photocatalyst active surface. The nanocomposite is apposite for solar energy-driven remediation of organic pollutants from environmental aqueous samples.
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Wang X, Mu B, Xu J, Wang A. Preparation of high-performance bismuth yellow hybrid pigments by doping with inorganic oxides. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.06.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Orimolade BO, Arotiba OA. Towards visible light driven photoelectrocatalysis for water treatment: Application of a FTO/BiVO 4/Ag 2S heterojunction anode for the removal of emerging pharmaceutical pollutants. Sci Rep 2020; 10:5348. [PMID: 32210322 PMCID: PMC7093548 DOI: 10.1038/s41598-020-62425-w] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/25/2020] [Indexed: 02/07/2023] Open
Abstract
Pharmaceuticals have been classified as emerging water pollutants which are recalcitrant in nature. In the quest to find a suitable technique in removing them from contaminated water, photoelectrocatalytic oxidation method has attracted much attention in recent years. This report examined the feasibility of degrading ciprofloxacin and sulfamethoxazole through photoelectrocatalytic oxidation using FTO-BiVO4/Ag2S with p-n heterojunction as anode. BiVO4/Ag2S was prepared through electrodeposition and successive ionic layer adsorption/reaction on FTO glass. Structural and morphological studies using XRD, SEM, EDS and diffusive reflectance UV-Vis confirmed the successful construction of p-n heterojunction of BiVO4/Ag2S. Electrochemical techniques were used to investigate enhanced charge separation in the binary electrode. The FTO-BiVO4/Ag2S electrode exhibited the highest photocurrent response (1.194 mA/cm-2) and longest electron lifetime (0.40 ms) than both pristine BiVO4 and Ag2S electrodes which confirmed the reduction in recombination of charge carriers in the electrode. Upon application of the prepared FTO-BiVO4/Ag2S in photoelectrocatalytic removal of ciprofloxacin and sulfamethoxazole, percentage removal of 80% and 86% were achieved respectively with a low bias potential of 1.2 V (vs Ag/AgCl) within 120 min. The electrode possesses good stability and reusability. The results obtained revealed BiVO4/Ag2S as a suitable photoanode for removing recalcitrant pharmaceutical molecules in water.
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Affiliation(s)
- Benjamin O Orimolade
- Department of Chemical Sciences, University of Johannesburg, Johannesburg, South Africa
| | - Omotayo A Arotiba
- Department of Chemical Sciences, University of Johannesburg, Johannesburg, South Africa.
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa.
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Che H, Che G, Zhou P, Liu C, Dong H. Yeast-derived carbon sphere as a bridge of charge carriers towards to enhanced photocatalytic activity of 2D/2D Cu2WS4/g-C3N4 heterojunction. J Colloid Interface Sci 2019; 546:262-275. [DOI: 10.1016/j.jcis.2019.03.080] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 03/19/2019] [Accepted: 03/24/2019] [Indexed: 12/24/2022]
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Orimolade BO, Koiki BA, Peleyeju GM, Arotiba OA. Visible light driven photoelectrocatalysis on a FTO/BiVO4/BiOI anode for water treatment involving emerging pharmaceutical pollutants. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.217] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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