Highly efficient single-crystalline NaNb1-XTaXO3（X = 0.125） wires: The synergistic effect of tantalum-doping and morphology on photocatalytic hydrogen evolution
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第19期
论文作者：Qianqian Liu Quan Zhang Lu Zhang Wei-Lin Dai
文章页码：20 - 30
摘 要：For the first time in this work, we manage to synthesize single-crystalline NaNb0.875Ta0.125O3 wires by combining the advantages of one-dimensional（1 D） nanostructure and heteroatom doping strategy. Careful Ta doping was performed to figure out the correlation between morphological and structural evolution as well as the photocatalytic performance towards H2 generation. It was found that, the as-prepared NaNb0.875Ta0.125O3 wires presented a highest and stable photocatalytic performance, which was appropriately 41 and 2 folds higher than that of bare Na TaO3 and Na NbO3. The optical activity was mainly ascribed to the synergistic effect between appropriate Ta doping and perfect 1 D wire-like morphology,which resulted in fewer defects, improved charge transfer efficiency and higher reduction capability of electrons. On the other hand, a possible photocatalytic mechanism of photocatalytic H2 production was proposed in detail. This work creates a new perspective into designing multi-component materials and understanding the mechanism of H2 evolution, which offers new opportunities for solar-energy conversion.
Qianqian Liu1，Quan Zhang2，Lu Zhang2，Wei-Lin Dai2
1. School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology2. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University
摘 要：For the first time in this work, we manage to synthesize single-crystalline NaNb0.875Ta0.125O3 wires by combining the advantages of one-dimensional（1 D） nanostructure and heteroatom doping strategy. Careful Ta doping was performed to figure out the correlation between morphological and structural evolution as well as the photocatalytic performance towards H2 generation. It was found that, the as-prepared NaNb0.875Ta0.125O3 wires presented a highest and stable photocatalytic performance, which was appropriately 41 and 2 folds higher than that of bare Na TaO3 and Na NbO3. The optical activity was mainly ascribed to the synergistic effect between appropriate Ta doping and perfect 1 D wire-like morphology,which resulted in fewer defects, improved charge transfer efficiency and higher reduction capability of electrons. On the other hand, a possible photocatalytic mechanism of photocatalytic H2 production was proposed in detail. This work creates a new perspective into designing multi-component materials and understanding the mechanism of H2 evolution, which offers new opportunities for solar-energy conversion.
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