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Citation: CHEN Yan-Hua, ZHENG Yu-Feng, ZHANG Xiao-Gang, SUN Yan-Fei, DONG You-Zhong. Effect of pH Value on FeS₂ Powder Synthesized by Solvothermal Process[J]. Acta Physico-Chimica Sinica, ;2005, 21(04): 419-424. doi: 10.3866/PKU.WHXB20050415 shu

Effect of pH Value on FeS₂ Powder Synthesized by Solvothermal Process

1.
Department of Physics; College of Chemical Engineering, Xinjiang University, Urumqi 830046

Received Date: 9 September 2004
Available Online: 15 April 2005

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.
- FeS₂ (pyrite); Solvothermal; pH value; Dispersant
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of pH Value on FeS₂ Powder Synthesized by Solvothermal Process