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Tang L, Dang Q, Tang Y, Xu Q, Zhu M, Han X, Liu P, Chen W. Synthesis of Fluoride-Substituted Layered Perovskites ZnMoO 4 with an Enhanced Photocatalytic Activity. ACS APPLIED MATERIALS & INTERFACES 2023; 15:43251-43258. [PMID: 34967214 DOI: 10.1021/acsami.1c23290] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Oxyfluorides possess considerable attention for their multiple excellent properties, but the conventional high-temperature solid-state syntheses have seen bottlenecks in the synthesis of new compounds. Herein, we report a novel layered oxyfluoride ZnMoO4:F, which is prepared by a facile hydrothermal method using ZnF2 as the fluoride source. The fluoride anions are successfully introduced into the oxygen sublattice, which is confirmed by a combined analysis using XRD, STEM, and TGA techniques. The as-synthesized ZnMoO4:F has an absorption edge at around 550 nm, indicating a red shift of Eg to the visible region compared to the oxide counterpart. The layered oxyfluoride exhibits an enhanced photocatalytic active for hydrogen evolution under simulated sunlight (λ > 350 nm), and the activity of ZnMoO4:F (651.9 μmol g-1) was 2 times higher than that of ZnMoO4 (309.7 μmol g-1). Further electrochemical analysis has shown that the conduction band position plays a critical role in the high performances of ZnMoO4:F. This work sheds new light on the future design and synthesis of novel fluoride-doped materials for photocatalysis applications.
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Affiliation(s)
- Liang Tang
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Qi Dang
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Ya Tang
- Department of Chemistry, School of Science, Shanghai University, Shanghai 200444, China
| | - Qinshang Xu
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Min Zhu
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Xiaocang Han
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 China
| | - Pan Liu
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 China
| | - Wenqian Chen
- Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
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Wang P, Chen W, Wang Z, Tang Y, Shi W, Tang L. Effect of layers on the photocatalytic hydrogen evolution in Dion-Jacobson layered-tantalum perovskites. Dalton Trans 2021; 50:16076-16083. [PMID: 34635892 DOI: 10.1039/d1dt02069b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tantalum-based layered perovskites have always been an interesting topic in photocatalysis, but limited information has been reported in terms of their layer factor. In this work, we have synthesized Dion-Jacobson layered perovskites (A'[An-1TanO3n+1]) of LaTaO4, KLaTa2O7, and KCa2Ta3O10 with n = 1, 2, and 3, respectively. With the modification of 1 wt% Pt co-catalysts, the photocatalytic analysis showed that the performance order of these layered perovskites with different layers is KLaTa2O7 (n = 2) > KCa2Ta3O10 (n = 3) ≫ LaTaO4 (n = 1) with both methanol and NaI as the sacrificial agents. This suggested the importance of interlayer K+ for high photocatalytic performance. We further analyzed the layered perovskites in detail by BET, photoelectrochemical analysis, Mott-Schottky, and VB-XPS test. The combined results indicated that the positions of the conduction band are the dominant factors for the photocatalytic performance of tantalum-based Dion-Jacobson layered perovskites with n = 2 and 3. This work sheds new light on the field of layered perovskites as efficient photocatalysts.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai 200444, PR China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Wenqian Chen
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai 200444, PR China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Zihan Wang
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai 200444, PR China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Ya Tang
- Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Roda, Baoshan District, Shanghai, China
| | - Wenyan Shi
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai 200444, PR China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Liang Tang
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai 200444, PR China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
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