Crystal Facet Dependent Energy Band Structures of Polyhedral Cu2O Nanocrystals and Their Application in Solar Fuel Production

被引：17

作者：

Yang, Shan-Jen ^{[1
]}

Lin, Yin -Kai ^{[2
]}

Pu, Ying-Chih ^{[1
]}

Hsu, Yung -Jung ^{[2
,3
]}

机构：

[1] Natl Univ Tainan, Dept Mat Sci, Tainan 70005, Taiwan

[2] Natl Yang Ming Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[3] Natl Yang Ming Chiao Tung Univ, Ctr Emergent Funct Matter Sci, Hsinchu 30010, Taiwan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2022年 / 13卷 / 27期

关键词：

PHOTOCATALYTIC PROPERTIES; NANOPARTICLES; PERFORMANCE; CO2;

D O I：

10.1021/acs.jpclett.2c01632

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrated a facile hydrothermal method to synthesize the (100)-, (110)-and (111)-oriented Cu2O nanocrystals (NCs) by controlling the concentration of the incorporated anions (CO32- and SO32-). The crystal facet dependent activity of the orientation controlled Cu2O NCs in the rhodamine B (RhB) photodegradation and photocatalytic hydrogen (H2) evolution was found to follow the trend: (111) > (110) > (100). The mechanism was investigated by characterizing the optical property, energy band structure, interfacial charge carrier dynamics and reducing ability. The results indicated that the (111)-oriented Cu2O NCs exhibit the higher conduction band (CB) potential as compared with the (110)-oriented and (100)-oriented Cu2O NCs, which resulted in the largest driving force of interfacial electron transfer for (111)-oriented Cu2O NCs to carry out solar fuel generation. The current study offers an easy strategy for crystal facet engineering of semiconductors and provides important physical insights into their electronic properties for the desired solar energy conversions.

引用

页码：6298 / 6305

页数：8

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