物理化学学报 >> 2005, Vol. 21 >> Issue (04): 419-424.doi: 10.3866/PKU.WHXB20050415

研究论文 上一篇    下一篇

pH值对溶剂热合成FeS2粉体的影响

陈艳华; 郑毓峰; 张校刚; 孙言飞; 董有忠   

  1. 新疆大学物理系; 新疆大学化工学院, 乌鲁木齐 830046
  • 收稿日期:2004-09-09 修回日期:2004-12-06 发布日期:2005-04-15
  • 通讯作者: 郑毓峰 E-mail:zyf2616@163.com

Effect of pH Value on FeS2 Powder Synthesized by Solvothermal Process

CHEN Yan-Hua; ZHENG Yu-Feng; ZHANG Xiao-Gang; SUN Yan-Fei; DONG You-Zhong   

  1. Department of Physics; College of Chemical Engineering, Xinjiang University, Urumqi 830046
  • Received:2004-09-09 Revised:2004-12-06 Published:2005-04-15
  • Contact: ZHENG Yu-Feng E-mail:zyf2616@163.com

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摘要： 采用FeSO4与NH2CSNH2为反应前驱物, 通过溶剂热反应合成了高纯度的FeS2 (pyrite)粉体. 实验表明,在聚乙烯吡咯烷酮（PVP）作保护剂的乙醇水溶液中, 200 ℃下反应36 h, 适当调节溶液的pH值, 即可在酸性环境(pH=5)和碱性环境(pH=10)下制得单一相的黄铁矿型FeS2粉体. 讨论了溶液pH值对溶剂热合成FeS2粉体物相组成、晶粒度及光学性质的影响.

关键词: FeS2, 溶剂热, pH值, 分散剂

Abstract: Synthesis of the FeS2 (pyrite) powders via a solvent-thermal process is reported. Using FeSO4 and NH2CSNH2 as precursors and polyvinylpyrrolidone (PVP) as a protective agent (dispersant), high purity FeS2 powders have been synthesized by reaction in alcohol-water solution at 200 ℃ for 36 h. The experiment result shows that, single-phase pyrite powders can be obtained both in acid environment (pH=5) and in alkali environment (pH=10). Effects of pH value on pyrite powder structure, crystallite size and optical characterization are discussed.

Key words: FeS2 (pyrite), Solvothermal, pH value, Dispersant