面(心理学)
表面光电压
化学
各向异性
平行六面体
光催化
离子
光诱导电荷分离
铬酸盐转化膜
半导体
化学物理
材料科学
化学工程
光学
纳米技术
人工光合作用
光电子学
催化作用
物理
有机化学
几何学
人格
五大性格特征
量子力学
生物化学
社会心理学
心理学
工程类
涂层
光谱学
数学
作者
Wenchao Jiang,Chenwei Ni,Zhang Ling-cong,Ming Shi,Jiangshan Qu,Hongpeng Zhou,Chengbo Zhang,Ruotian Chen,Xiuli Wang,Can Li,Rengui Li
标识
DOI:10.1002/ange.202207161
摘要
Abstract A crucial issue in artificial photosynthesis is how to modulate the behaviors of photogenerated charges of semiconductor photocatalysts. Here, using lead chromate (PbCrO 4 ) as an example, we conducted the morphology tailoring from parallelepiped (p‐PbCrO 4 ) to truncated decahedron (t‐PbCrO 4 ) and elongated rhombic (r‐PbCrO 4 ), resulting in exposed anisotropic facets. The spatial separation of photogenerated charges closely correlates to the anisotropic facets of crystals, which can only be realized for t‐PbCrO 4 and r‐PbCrO 4 . The charge‐separation efficiencies exhibit a quasilinear relation with the surface photovoltage difference between anisotropic facets. The r‐PbCrO 4 gives an apparent quantum efficiency of 6.5 % at 500 nm for photocatalytic water oxidation using Fe 3+ ions as electron acceptors. Moreover, the oxidation reverse reaction from Fe 2+ to Fe 3+ ions was completely blocked with ∼100 % of Fe 3+ conversion achieved on the anisotropic PbCrO 4 crystals.
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