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A quantitative study of charge carrier dynamics in well-defined WO3 nanowires and nanosheets: insight into the crystal facet effect in photocatalysis
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-07-06 , DOI: 10.1021/jacs.8b05293 Rui Lin 1 , Jiawei Wan 2 , Yu Xiong 1 , Konglin Wu 1 , Weng-chon Cheong 1 , Gang Zhou 3 , Dingsheng Wang 1 , Qing Peng 1 , Chen Chen 1 , Yadong Li 1
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-07-06 , DOI: 10.1021/jacs.8b05293 Rui Lin 1 , Jiawei Wan 2 , Yu Xiong 1 , Konglin Wu 1 , Weng-chon Cheong 1 , Gang Zhou 3 , Dingsheng Wang 1 , Qing Peng 1 , Chen Chen 1 , Yadong Li 1
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Photocatalysts with different morphologies and specific exposed facets usually exhibit distinguished activities. Previous researches have focused on revealing the essence of the facet effect in photocatalysis; however, quantitative analyses on the differences of carrier dynamic between different facets are scarce. Herein, we successfully synthesized WO3 nanosheets and nanowires with dominant exposed facets of {001} and {110}, respectively. The lower hole effective mass on {110} (0.94 m0) than on {001} (1.28 m0) calculated by density functional theory leads to the higher hole mobility on {110} (4.92 cm2 V-1 s-1) than on {001} (3.14 cm2 V-1 s-1). Combined with the Einstein equation and the lifetime of the hole, the calculated hole diffusion length on {110} (74.8 nm) is larger than on {001} (53.4 nm). Overall, the lower hole effective mass, higher hole mobility, and greater hole diffusion length on {110} collectively result in a photocatalytic activity on benzyl alcohol oxidation 2.46 times as high as that on {001}.
中文翻译：
明确定义的 WO3 纳米线和纳米片中电荷载流子动力学的定量研究：洞察光催化中的晶面效应
具有不同形态和特定暴露面的光催化剂通常表现出不同的活性。以往的研究主要集中在揭示光催化中刻面效应的本质；然而，对不同方面之间载流子动力学差异的定量分析很少。在此，我们成功地合成了分别具有 {001} 和 {110} 主要暴露面的 WO3 纳米片和纳米线。通过密度泛函理论计算的 {110} (0.94 m0) 上的空穴有效质量低于 {001} (1.28 m0) 导致 {110} (4.92 cm2 V-1 s-1) 上的空穴迁移率高于 { 001}（3.14 cm2 V-1 s-1）。结合爱因斯坦方程和空穴的寿命，{110} (74.8 nm) 上计算的空穴扩散长度大于 {001} (53.4 nm) 上的空穴扩散长度。总体而言，较低的孔有效质量，
更新日期：2018-07-06
中文翻译：
明确定义的 WO3 纳米线和纳米片中电荷载流子动力学的定量研究：洞察光催化中的晶面效应
具有不同形态和特定暴露面的光催化剂通常表现出不同的活性。以往的研究主要集中在揭示光催化中刻面效应的本质；然而，对不同方面之间载流子动力学差异的定量分析很少。在此，我们成功地合成了分别具有 {001} 和 {110} 主要暴露面的 WO3 纳米片和纳米线。通过密度泛函理论计算的 {110} (0.94 m0) 上的空穴有效质量低于 {001} (1.28 m0) 导致 {110} (4.92 cm2 V-1 s-1) 上的空穴迁移率高于 { 001}（3.14 cm2 V-1 s-1）。结合爱因斯坦方程和空穴的寿命，{110} (74.8 nm) 上计算的空穴扩散长度大于 {001} (53.4 nm) 上的空穴扩散长度。总体而言，较低的孔有效质量，
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