Exploring the Different Photocatalytic Performance for Dye Degradations over Hexagonal ZnIn2S4 Microspheres and Cubic ZnIn2S4 Nanoparticles

被引：278

作者：

Chen, Yongjuan ^{[1
]}

Huang, Renkun ^{[1
]}

Chen, Daqin ^{[2
]}

Wang, Yuansheng ^{[2
]}

Liu, Wenjun ^{[1
]}

Li, Xiaona ^{[1
]}

Li, Zhaohui ^{[1
]}

机构：

[1] Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Breeding Base Photocatalysis, Fuzhou 350002, Peoples R China

[2] Chinese Acad Sci, State Key Lab Struct Chem, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 04期

基金：

中国国家自然科学基金;

关键词：

ZnIn2S4; photocatalysis; dye; crystal facet; adsorption; VISIBLE-LIGHT; SINGLE-CRYSTALS; TIO2; IRRADIATION; ADSORPTION; ZN;

D O I：

10.1021/am300272f

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

Different pathways for the degradation of rhodamine (RhB) as well as different activity order for the degradation of RhB and methyl orange (MO) were observed over hexagonal ZnIn2S4 rnicrospheres and cubic ZnIn2S4 nanoparticles. A detailed study of the physicochemical and surface properties of these two ZnIn2S4 polymorphs has been carried out to elucidate these phenomena. The results reveal that hexagonal ZnIn2S4 microspheres are composed of nanolamella petals growing in the ab plane, i.e., the negative (0001) S plane. This negative (0001) S plane not only is favorable for the adsorption of the cationic dye RhB via-N(Et)(2) groups but also can accumulate the photogenerated holes. These make the hole-directed photocatalytic de-ethylation of RhB more expedient over hexagonal ZnIn2S4 microspheres. This negative (0001) S plane of hexagonal ZnIn2S4 microspheres also shows promoting effect for the degradation of cationic dye like MB, but not for the degradation of anionic dye like MO. Our result provides some new insights in how the surface facet can take effect on influencing the performance of a photocatalyst and why different polymorphs can exhibit different photocatalytic performance.

引用

页码：2273 / 2279

页数：7

共 30 条

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Photosensitized degradation of dyes in polyoxometalate solutions versus TiO2 dispersions under visible-light irradiation:: Mechanistic implications [J].