CuW（1-x）MoxO4 solid solution of CuWO4 and CuMoO4, which is a copper-based multi-component oxide semiconductor, possesses much narrower band gap than CuWO4. In theory, it can absorb a larger part of the visible spect...CuW（1-x）MoxO4 solid solution of CuWO4 and CuMoO4, which is a copper-based multi-component oxide semiconductor, possesses much narrower band gap than CuWO4. In theory, it can absorb a larger part of the visible spectrum, widening the use of solar spectroscopy and obtaining a higher photo-to-chemical conversion efficiency. In this study, CuW（1-x）MoxO4 thin-film photoanodes on conducting glass were prepared using a simple and low-cost spray pyrolysis method. The resulting CuW（1-x）MoxO4 photoanodes perform higher photocurrent than CuWO4 photoanodes under AM 1.5 G simulated sunlight illumination（100 m W cm^（-2））in 0.1 mol L^（-1） phosphate buffer at pH 7. Combined with IPCE and Mott-Schottky analysis, the enhancement of the photocurrent is due to the improvement of photon utilization and the increase of carrier concentration with the incorporation of Mo atoms. Moreover, with the optimal Mo/W atomic ratio,the photocurrent density increases obviously from 0.07 to 0.46 m A cm^（-2） at 1.23 V（RHE） bias. In addition, compared with particle-assembled thin-film photoanodes prepared by solidphase reaction and drop-necking treatment, the photoanodes prepared by spray pyrolysis have obvious advantages in terms of reducing resistance and facilitating charge transport.展开更多
基金supported by the National Basic Research Program of China (973 Program, 2013CB632404)National Natural Science Foundation of China (21473090 and 51272102)a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘CuW（1-x）MoxO4 solid solution of CuWO4 and CuMoO4, which is a copper-based multi-component oxide semiconductor, possesses much narrower band gap than CuWO4. In theory, it can absorb a larger part of the visible spectrum, widening the use of solar spectroscopy and obtaining a higher photo-to-chemical conversion efficiency. In this study, CuW（1-x）MoxO4 thin-film photoanodes on conducting glass were prepared using a simple and low-cost spray pyrolysis method. The resulting CuW（1-x）MoxO4 photoanodes perform higher photocurrent than CuWO4 photoanodes under AM 1.5 G simulated sunlight illumination（100 m W cm^（-2））in 0.1 mol L^（-1） phosphate buffer at pH 7. Combined with IPCE and Mott-Schottky analysis, the enhancement of the photocurrent is due to the improvement of photon utilization and the increase of carrier concentration with the incorporation of Mo atoms. Moreover, with the optimal Mo/W atomic ratio,the photocurrent density increases obviously from 0.07 to 0.46 m A cm^（-2） at 1.23 V（RHE） bias. In addition, compared with particle-assembled thin-film photoanodes prepared by solidphase reaction and drop-necking treatment, the photoanodes prepared by spray pyrolysis have obvious advantages in terms of reducing resistance and facilitating charge transport.
