期刊
ACS APPLIED MATERIALS & INTERFACES
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c23290
关键词
ZnMoO4; fluoride-doped oxides; layered perovskites; photocatalysis; hydrothermal synthesis
资金
- National Natural Science Foundation of China [22002086, 12104286]
- program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning [QD2019005]
This study reports a novel layered oxyfluoride ZnMoO4:F prepared by a hydrothermal method, which successfully introduces fluoride ions and shows superior performance in photocatalytic hydrogen evolution, demonstrating the potential application of fluoride-doped materials.
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 E-g to the visible region compared to the oxide counterpart. The layered oxyfluoride exhibits an enhanced photocatalytic active for hydrogen evolution under simulated sunlight (lambda > 350 nm), and the activity of ZnMoO4:F (651.9 mu mol g(-1)) was 2 times higher than that of ZnMoO4 (309.7 mu mol 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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