pH值对溶剂热合成FeS_2粉体的影响  

Effect of pH Value on FeS_2 Powder Synthesized by Solvothermal Process

作　　者：陈艳华[1] 郑毓峰[1] 张校刚[2] 孙言飞[1] 董有忠[1] 

机构地区：[1]新疆大学物理系 [2]新疆大学化工学院,乌鲁木齐830046

出　　处：《物理化学学报》2005年第4期419-424,共6页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(50062002)资助项目~~

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.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 degrees C 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.

关 键 词：FeS2 溶剂热 PH值 分散剂 

分 类 号：TN304[电子电信—物理电子学]