标题：Fabrication of BiVO4 photoanode consisted of mesoporous nanoparticles with improved bulk charge separation efficiency
作者：Zhang, Haipeng ;Li, Huiliang ;Wang, Zeyan ;Zheng, Zhaoke ;Wang, Peng ;Liu, Yuanyuan ;Zhang, Xiaoyang ;Qin, Xiaoyan ;Dai, Ying ;Huang, Baibiao
作者机构：[Zhang, Haipeng ;Li, Huiliang ;Wang, Zeyan ;Zheng, Zhaoke ;Wang, Peng ;Liu, Yuanyuan ;Zhang, Xiaoyang ;Qin, Xiaoyan ;Huang, Baibiao ] State Key Labora 更多
来源：Applied Catalysis B: Environmental
摘要：In this work, we developed a simple method to fabricate BiVO4 photoanode consisted of mesoporous nanoparticles (meso-BVO) by using P123 as a pore maker. Owing to the unique mesoporous nanostructure, meso-BVO exhibits higher BET surface areas, shorter hole transit distance and higher electrical conductivity than does pristine BiVO4 photoanode (BVO) consisted of solid nanoparticles. As a result, the charge separation efficiency and PEC performances of meso-BVO have been greatly improved. Meso-BVO yields a photocurrent of 2.19 mA/cm2 (1.23 V vs RHE) and IPCE of 39% (420 nm), which is 2.52 and 2 times as high as that of pristine BVO. With the assistance of Mo6+ ions doping and Co-Pi, the PEC performances could be further improved by addressing the inefficient electron transport and slow water oxidation kinetics. Co-Pi/Mo:meso-BVO yields a photocurrent of 4.57 mA/cm2 (1.23 V vs RHE) and IPCE value of 65% (420 nm). The enhanced PEC performance can be mainly ascribed to the perfect charge separation in the bulk of Co-Pi/Mo:meso-BVO photoanode. Our work provides a simple method to fabricate high efficient BiVO4 photoanodes consisted of mesoporous nanoparticles with enhanced bulk charge separation efficiencies.
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