Abstract：Nanocrystalline silver sulfide was successfully synthesized at room temperature and ambient pressure via a novel, safe, convenient and inexpensive redox reaction, using silver oxide, sulfur and polyformaldehyde as reactants and ethylenediamine as solvent. The products were characterized with XPS, XRD and TEM. XRD spectrum demonstrates a monoclinic Ag2S; TEM shows the products are rod-like nanoparticles with average diameter of 100 nm, its corresponding SAED reveals clear diffraction spots indexed as (120) and (3-03); XPS confirms the formation of Ag2S and indicates the sample’s surface stoichiometry of Ag∶S=1∶0.453. The control experiments show polyformaldehyde and ethylenediamine are both important in the formation of products. Ethylenediamine accelerates the reactions via dissolving silver oxide and sulfur and neutralizing the by-product formic acid.
叶 寅，邵名望*，吴正翠，倪友保 . 室温合成硫化银纳米粒子及其X射线光电子能谱表征[J]. 光谱学与光谱分析, 2005, 25(04): 553-555.
YE Yin, SHAO Ming-wang*, WU Zheng-cui, NI You-bao . Synthesis of Ag2S Nanoparticles at Room Temperature and Their Characterization with XPS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(04): 553-555.
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