黄铁矿
X射线光电子能谱
材料科学
拉曼光谱
热液循环
化学工程
聚乙烯吡咯烷酮
水热合成
硫脲
硫黄
光谱学
化学
无机化学
矿物学
有机化学
高分子化学
冶金
工程类
物理
光学
量子力学
作者
Yuxuan Liang,Pengpeng Bai,Jie Zhou,Tianqi Wang,Bingwei Luo,Shuqi Zheng
出处
期刊:CrystEngComm
[The Royal Society of Chemistry]
日期:2016-01-01
卷期号:18 (33): 6262-6271
被引量:46
摘要
Non-toxic and earth-abundant pyrite (FeS2) is a promising photoelectric material for solar energy conversion and storage. In this study, an efficient FeS precursor was employed to synthesise successfully various shapes of pyrite FeS2, such as nanopolyhedra, nanocubes, nanooctahedra, and irregular nanocrystals via a simple hydrothermal method by adjusting the reaction conditions. Pyrite FeS2 nanopolyhedra and nanocubes were synthesised using the FeS precursor as the single iron source and thiourea (NH2CSNH2) as the sulphur source at various reaction temperatures. Nanooctahedra and irregular nanocrystals were obtained using sodium thiosulfate pentahydrate (Na2S2O3·5H2O) and sulphur powder as sulphur sources. The effects of polyvinylpyrrolidone content and the molar ratio of the FeS precursor to NH2CSNH2 on the formation of cubic shaped pyrite FeS2 were investigated. The products were characterised by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet–visible and Raman spectroscopy. The proposed facile hydrothermal method used an efficient FeS precursor as the iron source, which can be easily controlled to produce high-purity pyrite FeS2 with desirable optical absorption properties.
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