Ba2AsGaSe5: A New Quaternary Selenide with the Novel [AsGaSe5]4- Cluster and Interesting Photocatalytic Properties

被引：33

作者：

Li, Chao ^{[1
,2
,3
]}

Li, Xiaoshuang ^{[1
,2
,3
]}

Huang, Hongwei ^{[4
]}

Yao, Jiyong ^{[1
,2
]}

Wu, Yicheng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Ctr Crystal Res & Dev, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] China Univ Geosci, Sch Mat Sci & Technol, Natl Lab Mineral Mat, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Beijing 100083, Peoples R China

来源：

INORGANIC CHEMISTRY | 2015年 / 54卷 / 20期

基金：

中国国家自然科学基金;

关键词：

CRYSTAL-STRUCTURE; PHASE-TRANSFORMATIONS; ELECTRONIC-STRUCTURE; ANION SYNTHESIS; BAND-GAP; CHAINS; LA; LN;

D O I：

10.1021/acs.inorgchem.5b01501

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new zero-dimensional selenide Ba2AsGaSe5 was synthesized via a solid-state reaction at 900 degrees C. It belongs to the orthorhombic space group Pnma with a = 12.632(3) angstrom, b = 8.9726(18) angstrom, c = 9.2029(18) angstrom, and Z = 4. In the structure, the As atom adopts trigonal-pyramidal coordination owing to the stereochemically active 4s(2) lone pair electrons and the Ga atom is tetrahedrally coordinated with four Se atoms. The AsSe3 trigonal pyramids share edges with GaSe4 tetrahedra to form novel [AsGaSe5](4-) clusters, which are further separated from each other by Ba2+ cations. The optical band gap was determined as 1.39 eV according to UV-vis-NIR diffuse reflectance spectroscopy. Interestingly, the photocatalytic behavior investigated by decomposing rhodamine B indicates that the compound displays a 6.5 times higher photocatalytic activity than does P25.

引用

页码：9785 / 9789

页数：5

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