文献类型：期刊文献

英文题名：Facile synthesis of ZnS-CdIn₂S₄-alloyed nanocrystals with tunable band gap and its photocatalytic activity

作者：Xu, Hu[1];Zhang, Wenjin[1];Jin, Wei[2];Ding, Yiwen[2];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China

年份：2013

卷号：135

起止页码：47

外文期刊名：JOURNAL OF LUMINESCENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000316238400010)】；

基金：We thank the National Natural Science Foundation of China (No. 21175043), the Science and Technology Commission of Shanghai Municipality (No. 11JC1403100 and 10dz2220500), the Fundamental Research Funds for the Central Universities, and the Program for Professor of Special Appointment, at Shanghai Institutions of Higher Learning for financial supports.

语种：英文

外文关键词：Quaternary nanocrystals; ZnS-CdIn2S4 alloy; Band gap tunability; Photocatalytic activity

摘要：High-quality colloidal ZnS-CdIn2S4 (ZCIS) quaternary alloyed nanocrystals (NCs) have been synthesized via the reaction between acetate salts of the corresponding metals and elemental sulfur in the presence of dodecanethiol in octadecene media at 230 degrees C. The photoluminescence (PL) emission wavelength can be conveniently tuned from 498 to 635 nm via the variation of stoichiometric ratio of corresponding components. The influence of various experimental variables, such as reaction temperature, amounts of sulfur and dodecanethiol, and Zn:CdIn2 ratio, on the optical properties of the obtained ZCIS NCs have been systematically investigated. The plain ZCIS core NCs did show PL but with quite low quantum yield (QY, typically below 5%). In order to improve the PL QY, ZnS shell was subsequently overcoated around the ZCIS core NCs. With the overgrowth of ZnS shell, the PL QY can be up to 48%. Furthermore, the obtained ZCIS/ZnS NCs show a promising photocatalytic activity in the degradation of rhodamine B. (C) 2012 Elsevier B.V. All rights reserved.