ChemInform Abstract: One-Step Solution Synthesis of Bismuth Sulfide (Bi2S3) with Various Hierarchical Architectures and Their Photoresponse Properties.
✍ Scribed by Guanjun Xiao; Qingfeng Dong; Yingnan Wang; Yongming Sui; Jiajia Ning; Zhaoyang Liu; Wenjing Tian; Bingbing Liu; Guangtian Zou; Bo Zou
- Publisher
- John Wiley and Sons
- Year
- 2012
- Weight
- 23 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0931-7597
No coin nor oath required. For personal study only.
✦ Synopsis
One-Step Solution Synthesis of Bismuth Sulfide (Bi 2 S 3 ) with Various Hierarchical
Architectures and Their Photoresponse Properties. -The title compound is synthesized from a mixture of Bi(OAc)3, sulfur in 1-octadecene, and oleic acid (180 °C, 2 h). The size and shape of the resultant Bi2S3 hierarchical architectures are controlled by the reaction temperature, the ratio of precursors, and the concentration of oleic acid. At about 27°C, wheat-like Bi 2 S 3 is produced. With increasing temperature, chrysanthenum-like and dandelion-like shapes are obtained. For a Bi(OAc)3/S ratio of 2:1, clover--like Bi2S3 forms at 130 °C. Increasing the ratio to 2:3 and 2:5, the flowers turn into loose structures which are composed of more filaments. As-prepared Bi2S3 microstructures possess a direct band gap of about 1.9 eV. The photocurrent of sheaf-like samples increases by about one order of magnitude compared to the dark state, indicating excellent sensitivity with respect to potential applications in photoelectric switch and light-sensitive devices.