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Homologous Compounds ZnnIn2O3+n (n=4, 5, and 7) Containing Laminated Functional Groups as Efficient Photocatalysts for Hydrogen Production
Lv, M; Liu, G; Xu, XX; Xu, XX (reprint author), Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
2016-10-26
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
卷号8期号:42页码:28700-28708
摘要Strong visible light absorption and high charge mobility are desirable properties for an efficient photocatalyst, yet they are hard to be realized simultaneously in a single semiconductor compound. In this work, we demonstrate that these properties coexist in homologous compounds ZnnIn2O3+n (n = 4, 5, and 7) with a peculiar layered structure that combines optical active segment and electrical conductive segment together. Their enhanced visible light absorption originates from tetrahedrally or trigonal-bipyramidally coordinated In atoms in Zn(In)O-4(5) layers which enable p-d hybridization between In 4d and O 2p orbitals so that valence band minimum (VBM) is uplifted with a reduced band gap. Theoretical calculations reveal their anisotropic features in charge transport and functionality of different constituent segments, i.e., Zn(In)O-4(5) layers and InO6 layers as being for charge generation and charge collection, respectively. Efficient photocatalytic hydrogen evolution was observed in these compounds under full range (lambda >= 250 nm) and visible light irradiation (lambda >= 420 nm). High apparent quantum efficiency similar to 2.79% was achieved for Zn4In2O7 under full range irradiation, which is almost 5-fold higher than their parent oxides ZnO and In2O3. Such superior photocatalytic activities of these homologous compounds can be understood as layer-by-layer packing of charge generation/collection functional groups that ensures efficient photocatalytic reactions.
部门归属[lv, man ; xu, xiaoxiang] tongji univ, sch chem sci & engn, shanghai key lab chem assessment & sustainabil, 1239 siping rd, shanghai 200092, peoples r china ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词Homologous Compounds Photocatalyst Water Splitting Layered Materials Orbital Hybridizations
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
资助者National Natural Science Foundation of China [21401142]; Shanghai Science and Technology Commission [14DZ2261100]; Fundamental Research Funds for the Central Universities
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76230
专题中国科学院金属研究所
通讯作者Xu, XX (reprint author), Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
推荐引用方式
GB/T 7714
Lv, M,Liu, G,Xu, XX,et al. Homologous Compounds ZnnIn2O3+n (n=4, 5, and 7) Containing Laminated Functional Groups as Efficient Photocatalysts for Hydrogen Production[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(42):28700-28708.
APA Lv, M,Liu, G,Xu, XX,&Xu, XX .(2016).Homologous Compounds ZnnIn2O3+n (n=4, 5, and 7) Containing Laminated Functional Groups as Efficient Photocatalysts for Hydrogen Production.ACS APPLIED MATERIALS & INTERFACES,8(42),28700-28708.
MLA Lv, M,et al."Homologous Compounds ZnnIn2O3+n (n=4, 5, and 7) Containing Laminated Functional Groups as Efficient Photocatalysts for Hydrogen Production".ACS APPLIED MATERIALS & INTERFACES 8.42(2016):28700-28708.
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