【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36h,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.更多还原

【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.更多还原