Key Roles of Solution pH and Ligands in the Synthesis of Aqueous ZnTe Nanoparticles
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- 作者：Shuhong Xu ; Chunlei Wang ; Qinying Xu ; Haisheng Zhang ; Rongqing Li ; Haibao Shao ; Wei Lei ; Yiping Cui
- 刊名：Chemistry of Materials
- 出版年：2010
- 出版时间：November 9, 2010
- 年：2010
- 卷：22
- 期：21
- 页码：5838-5844
- 全文大小：851K
- 年卷期：v.22,no.21(November 9, 2010)
- ISSN：1520-5002
文摘
In this work, we reported original synthesis of ZnTe nanoparticles in aqueous solution. The solution pH is believed to be a major factor governing the synthesis of thioglycolic acid (TGA)-capped ZnTe nanoparticles. In the pH range of 5.9−7.1 and the pH range over 10.0, TGA-capped ZnTe nanoparticles can be successfully prepared. In the pH range of 7.1−10.0, TGA-capped ZnTe nanoparticles rapidly precipitate from the solution, which is caused by the formation of Zn(OH)2 precipitates and the strong adsorption incapacity of Zn(OH)2 with TGA-capped ZnTe nanoparticles. When 1-thiolglycerol (TG) is selected as the ligand, ZnTe nanoparticles show good stability in the pH range of 7.1−10.0 due to the weak adsorption capacity of Zn(OH)2 with TG-capped ZnTe nanoparticles. As a result, ZnTe nanoparticles can be prepared in a wide pH range using TGA and TG as the ligands.