纳米线
化学
光催化
电荷(物理)
载流子
材料科学
化学物理
纳米技术
光电子学
Crystal(编程语言)
化学工程
面(心理学)
催化作用
物理
有机化学
人格
工程类
程序设计语言
五大性格特征
社会心理学
量子力学
计算机科学
心理学
作者
Rui Lin,Jiawei Wan,Yu Xiong,Konglin Wu,Weng‐Chon Cheong,Gang Zhou,Dingsheng Wang,Qing Peng,Chen Chen,Yadong Li
摘要
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} (0.94m0) than on {001} (1.28m0) 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}.
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