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Waehayee A, Duangkamol C, Chotsawat M, Lerdwiriyanupap T, Pewklang T, Nakajima H, Butburee T, Kamkaew A, Suthirakun S, Siritanon T. Controlling the Photocatalytic Activity and Benzylamine Photooxidation Selectivity of Bi 2WO 6 via Ion Substitution: Effects of Electronegativity. Inorg Chem 2023; 62:3506-3517. [PMID: 36787191 DOI: 10.1021/acs.inorgchem.2c03860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Doping or ion substitution is often used as an effective strategy to improve photocatalytic activities of several semiconductors. Most frequently, the dopants provide extra states to increase light absorption, alter the electronic structure, or lower the carrier recombination. This work focuses on ion substitution in Bi2WO6, where the dopants modify band-edge potentials of the catalysts. Specifically, we investigate how the electronegativity (EN) of the dopant could be used to tune the band-edge potentials and how such changes influence the photocatalytic mechanism. Compared to Te that has a lower EN, I lowers the band-edge potentials. While substitutions with both ions enhance Rh B photodegradation and benzylamine photooxidation, the modified band potentials of I-doped Bi2WO6 influence the benzylamine photooxidation pathway, resulting in higher selectivity. Additionally, substitution of I7+ in the Bi2WO6 lattice improves the morphologies, decreases the band-gap energy, and reduces the carrier recombination. As a result, I-doped Bi2WO6 shows almost 3 times higher %conversion while maintaining 100% selectivity in the oxidative coupling of benzylamine. The findings here signify the importance of the choices of dopants on the photocatalytic reactions and would benefit the design of other related materials for such applications.
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Affiliation(s)
- Anurak Waehayee
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand.,Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Chuthamat Duangkamol
- Division of Basic and Medical Sciences, Faculty of Allied Health Sciences, Pathumthani University, Pathum Thani 12000, Thailand
| | - Maneerat Chotsawat
- Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Tharit Lerdwiriyanupap
- Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Thitima Pewklang
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Hideki Nakajima
- Synchrotron Light Research Institute, 111 University Avenue, Nakhon Ratchasima 30000, Thailand
| | - Teera Butburee
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Pathum Thani 12120, Thailand
| | - Anyanee Kamkaew
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Suwit Suthirakun
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
| | - Theeranun Siritanon
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand
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Jahangir TN, Khan AZ, Kandiel TA, El Ali BM. Insights into the charge transfer kinetics in BiVO4 photoanodes modified with transition metal-based oxygen evolution electrocatalysts. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Ding X, Liu X, Cheng J, Kong L, Guo Y. Advanced catalytic CO 2 hydrogenation on Ni/ZrO 2 with light induced oxygen vacancy formation in photothermal conditions at medium-low temperatures. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00439a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective CH4 formation from CO2 hydrogenation is an appealing yet challenging sunlight-driven or thermal-driven process due to low solar energy utilization efficiency or high energy input.
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Affiliation(s)
- Xin Ding
- Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Xu Liu
- Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Jiahui Cheng
- Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Lingzhao Kong
- CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, P.R. China
| | - Yang Guo
- Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
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Su K, Liu H, Gao Z, Fornasiero P, Wang F. Nb 2O 5-Based Photocatalysts. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003156. [PMID: 33898172 PMCID: PMC8061393 DOI: 10.1002/advs.202003156] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/23/2020] [Indexed: 05/02/2023]
Abstract
Photocatalysis is one potential solution to the energy and environmental crisis and greatly relies on the development of the catalysts. Niobium pentoxide (Nb2O5), a typically nontoxic metal oxide, is eco-friendly and exhibits strong oxidation ability, and has attracted considerable attention from researchers. Furthermore, unique Lewis acid sites (LASs) and Brønsted acid sites (BASs) are observed on Nb2O5 prepared by different methods. Herein, the recent advances in the synthesis and application of Nb2O5-based photocatalysts, including the pure Nb2O5, doped Nb2O5, metal species supported on Nb2O5, and other composited Nb2O5 catalysts, are summarized. An overview is provided for the role of size and crystalline phase, unsaturated Nb sites and oxygen vacancies, LASs and BASs, dopants and surface metal species, and heterojunction structure on the Nb2O5-based catalysts in photocatalysis. Finally, the challenges are also presented, which are possibly overcome by integrating the synthetic methodology, developing novel photoelectric characterization techniques, and a profound understanding of the local structure of Nb2O5.
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Affiliation(s)
- Kaiyi Su
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
- University of Chinese Academy of SciencesBeijing100049China
| | - Huifang Liu
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
| | - Zhuyan Gao
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
- University of Chinese Academy of SciencesBeijing100049China
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical SciencesINSTM ‐ Trieste and ICCOM ‐ CNR TriesteUniversity of TriesteVia L. Giorgieri 1Trieste34127Italy
| | - Feng Wang
- State Key Laboratory of Catalysis (SKLC)Dalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics (DICP)Chinese Academy of SciencesDalian116023China
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5
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Waehayee A, Pongsawakul C, Ngoipala A, Phonsuksawang P, Jiamprasertboon A, Wannapaiboon S, Nakajima H, Butburee T, Suthirakun S, Siritanon T. Promoting superoxide generation in Bi 2WO 6 by less electronegative substitution for enhanced photocatalytic performance: an example of Te doping. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00739d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doping with elements with lower electronegativity, like Te, shifts the band potentials of Bi2WO6 to the point that superoxide radical generation is feasible. As a result, an optimum of 2.5 at% Te doping improves the activity of Bi2WO6 by 48 times.
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Affiliation(s)
- Anurak Waehayee
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
- Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
| | - Chawit Pongsawakul
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
| | - Apinya Ngoipala
- School of Physics, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
| | - Praphaiphon Phonsuksawang
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
- Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
| | - Arreerat Jiamprasertboon
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
- Institute of Research and Development, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
| | - Suttipong Wannapaiboon
- Synchrotron Light Research Institute, 111 University Avenue, Nakhon Ratchasima 30000, Thailand
| | - Hideki Nakajima
- Synchrotron Light Research Institute, 111 University Avenue, Nakhon Ratchasima 30000, Thailand
| | - Teera Butburee
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Pathum Thani 12120, Thailand
- Research Network NANOTEC – SUT on Advanced Nanomaterials and Characterization, School of chemistry, Suranaree University of Technology, 30000, Thailand
| | - Suwit Suthirakun
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
- Research Network NANOTEC – SUT on Advanced Nanomaterials and Characterization, School of chemistry, Suranaree University of Technology, 30000, Thailand
| | - Theeranun Siritanon
- School of Chemistry, Institute of Science, Suranaree University of Technology, 111 University Avenue, Muang, 30000, Thailand
- Research Network NANOTEC – SUT on Advanced Nanomaterials and Characterization, School of chemistry, Suranaree University of Technology, 30000, Thailand
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6
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Wang L, Li Y, Han P, Jiang Y. Facile fabrication of Fe-doped Nb 2O 5 nanofibers by an electrospinning process and their application in photocatalysis. RSC Adv 2020; 11:462-469. [PMID: 35423069 PMCID: PMC8691001 DOI: 10.1039/d0ra10042k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 12/08/2020] [Indexed: 01/01/2023] Open
Abstract
It is of top priority to develop highly efficient visible-light photocatalysts to realize the practical applications of photocatalysis in industry. Niobium pentoxide (Nb2O5) is considered as a potentially attractive candidate for the visible-light-driven photodegradation of organic pollutants. In an effort to enhance its photocatalytic activity, Fe-doped Nb2O5 nanofibers with various Fe contents (the molar ratios of Fe to Nb were 0.005/1, 0.01/1, 0.03/1 or 0.05/1) were successfully prepared by an electrospinning method. The structural features, morphologies, and optical properties of the as-prepared samples were investigated. Photocatalytic activities of the samples were evaluated through degradation of Rhodamine B (RhB) under visible light irradiation. All the prepared Fe-doped Nb2O5 nanofibers exhibited much higher activities for degrading RhB solution than the pristine Nb2O5 nanofibers, and the maximum degradation yield of 98.4% was achieved with the nanofibers (Fe to Nb: 0.03/1) under visible light irradiation for 150 min. The photocatalytic degradation rate fitted a pseudo-first-order equation, and the rate constants of reactions with Fe-doped Nb2O5 nanofiber (the molar ratios of Fe to Nb were 0.03/1) or pure Nb2O5 nanofiber were 0.0282 min-1 and 0.0019 min-1, respectively. Doping Fe ions into the nanofibers enhanced the absorption within the visible-light range and reduced the photo-generated electron-hole pair recombination, and thus improved the photocatalytic activity. These attractive properties suggest that the Fe-doped Nb2O5 nanofibers have great potential for applications in the future to solve pollution issues.
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Affiliation(s)
- Lu Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing 211816 China
- Nantong Vocational University Nantong 226007 China
| | - Ya Li
- Nantong College of Science and Technology Nantong 226007 China
| | - Pingfang Han
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University Nanjing 211816 China
| | - Yunxia Jiang
- Nantong College of Science and Technology Nantong 226007 China
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Waehayee A, Watthaisong P, Wannapaiboon S, Chanlek N, Nakajima H, Wittayakun J, Suthirakun S, Siritanon T. Effects of different exchanging ions on the band structure and photocatalytic activity of defect pyrochlore oxide: a case study on KNbTeO 6. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01782h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The effects of different exchanging ions including Ag, Cu, and Sn on enhancing the photocatalytic activity of KNbTeO6 are investigated by means of experiments and calculations.
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Affiliation(s)
- Anurak Waehayee
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Muang
- Thailand
| | - Panuwat Watthaisong
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Muang
- Thailand
| | | | - Narong Chanlek
- Synchrotron Light Research Institute
- Nakhon Ratchasima 30000
- Thailand
- Research Network NANOTEC – SUT on Advanced Nanomaterials and Characterization
- School of chemistry
| | - Hideki Nakajima
- Synchrotron Light Research Institute
- Nakhon Ratchasima 30000
- Thailand
| | - Jatuporn Wittayakun
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Muang
- Thailand
| | - Suwit Suthirakun
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Muang
- Thailand
| | - Theeranun Siritanon
- School of Chemistry
- Institute of Science
- Suranaree University of Technology
- Muang
- Thailand
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8
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Wang X, Zhai Y, Kuang C, Liu H, Li L. Simple Synthesis of K₄Nb₆O 17/C Nanosheets for High-Power Lithium-Ion Batteries with Good Stability. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E262. [PMID: 30650568 PMCID: PMC6357341 DOI: 10.3390/ma12020262] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 01/02/2019] [Accepted: 01/07/2019] [Indexed: 11/26/2022]
Abstract
In this work, a series of two-dimensional (2D) large-size nanosheets were prepared through one-step exfoliation of the huge K₄Nb₆O17 crystals. The K₄Nb₆O17 nanosheets with the thickness of about 2 nm was used as the templates of dopamine polymerization and was then carbonized to form C-doped K₄Nb₆O17 nanosheets. More importantly, the C-doped K₄Nb₆O17 nanosheets exhibited excellent electrochemical performance with high specific capacity (381 mA h g-1 at 0.05 A g-1, 0.5⁻3.0 V vs. Li/Li⁺) and stable cyclability at high current density (remarkably, preserved a capacity of discharge approximately 90 mA h g-1 at 5 A g-1 after 1000 cycles). The good electrochemical performances of the C-doped K₄Nb₆O17 nanosheets can be attributed to the outstanding 2D structure and large specific surface, which afforded the short transport route for ion and electron. These noteworthy results demonstrated that the new 2D nanomaterials might be potential candidates for the high-performance, environmentally friendly, and low-cost electrochemical energy storage equipment.
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Affiliation(s)
- Xiangwei Wang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Yunyun Zhai
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Chunxia Kuang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Haiqing Liu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Lei Li
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
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Kong W, Liu Z, Han J, Xia L, Wang Y, Liu Q, Shi X, Wu Y, Xu Y, Sun X. Ambient electrochemical N2-to-NH3 fixation enabled by Nb2O5 nanowire array. Inorg Chem Front 2019. [DOI: 10.1039/c8qi01049h] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Nb2O5 nanowire array on carbon cloth (Nb2O5/CC) is efficient for ambient electrocatalytic N2-to-NH3 fixation with excellent selectivity in 0.1 M Na2SO4.
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Liu X, Wang Z, Chen P, Zhou H, Kong LB, Niu C, Que W. New Insights into the Electronic Structure and Photoelectrochemical Properties of Nitrogen-Doped HNb 3O 8 via a Combined in Situ Experimental and DFT Investigation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:42751-42760. [PMID: 29143523 DOI: 10.1021/acsami.7b13704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The nitrogen-doping approach has been intensively adopted to improve various properties of metal oxides, especially for adjusting the energy band structure and extending the photoresponse range of oxide photocatalysts. However, the nitrogen doping behavior is still unintelligible and complex due to the diversity of compositions and crystal structures. In this work, new insights into the electronic structure and photoelectrochemical (PEC) properties of nitrogen-doped HNb3O8 were presented. On the one hand, we utilized an in situ experimental strategy to ascertain the effect of nitrogen doping on the energy band and photoelectrochemical (PEC) properties of HNb3O8 and nitrogen-doped HNb3O8 (N-HNb3O8). Their energy band level, donor densities, and interfacial charge transfer properties were studied by Mott-Schottky plots and electrochemical impedance spectroscopy. After nitrogen doping, the conduction band position is unusually descended by 0.23 eV, the valance band position is raised by 0.51 eV, the donor density (Nd) is increased from 3.71 × 1021 to 6.46 × 1021 cm-3, and interfacial charge transfer efficiency is reduced, though. On the other hand, density functional theoretical calculations were also conducted, so as to understand the electronic structures of HNb3O8 and N-HNb3O8. After nitrogen doping, the electronic structure is modified due to the upshift of the valance band edge consisting of hybrid N 2p and O 2p orbitals and the downshift of the conduction band edge consisting of the H 1s and Nb 4d orbitals. Furthermore, these insights into the behavior of nitrogen-doped semiconductors have important guiding significance toward their potential applications.
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Affiliation(s)
| | | | | | - Huanfu Zhou
- Key laboratory of Nonferrous Materials and New Processing Technology-Ministry of Education, Guilin University of Technology , Guilin 541004, People's Republic of China
| | - Ling Bing Kong
- School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
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Liu X, Que W, Chen P, Tian Y, Liu J, He Z, Zhou H, Bing Kong L. Facile preparation of protonated hexaniobate nanosheets and its enhanced photocatalytic activity. NANOTECHNOLOGY 2017; 28:235702. [PMID: 28516900 DOI: 10.1088/1361-6528/aa6b4f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Exfoliated hexaniobate nanosheets E-H2K2Nb6O17-x (E-HKNO) with broad light absorption (up to 850 nm) and high adsorption properties were prepared via ion exchange and transient annealing processes with micron-size K4Nb6O17 powders as the precursor. The as-prepared E-HKNO nanosheets show excellent visible light photodegradation performances when compared to degussa P25, which was evaluated in terms of degradation of Rhodamine B (Rh B). High adsorption and broad light absorption characteristics could be attributed to the exfoliation behavior and the reduction of surface Nb5+ to Nb4+, which was confirmed by x-ray photoelectron spectroscopy (XPS) and Raman spectra. From the Mott-Schottky analysis, the E-HKNO is an n-type semiconductor and has a higher flat band voltage (-0.46 V versus RHE at pH = 7), compared with K4Nb6O17. In addition, the electrochemical impedance spectroscopy (EIS) indicates that the E-HKNO nanosheets have an increased semiconductor-electrolyte charge transfer resistance, which is not conducive to the separation of photogenerated carriers (e--h+). Accordingly, a small amount of holes scavenger (EDTA) was added to improve the photodegradation performance of the E-HKNO, since the holes scavenger can inhibit the recombination of the photogenerated carriers. This work provides not only a facile method for the preparation of an efficient E-HKNO nanosheets photocatalyst, but also new insights for further enhancing the photodegradation performance by adding trace scavenger.
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Affiliation(s)
- Xiaobin Liu
- Electronic Materials Research Laboratory, International Center for Dielectric Research, Key Laboratory of the Ministry of Education, School of Electronic & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
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