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选用醋酸锌和硫代硫酸钠为原料 ,在“活性”水或甲苯中进行氧化 -还原反应 ,制备了质量良好的 Zn S纳米粒子。主要探讨在高温和高压的条件下以水或甲苯作为反应介质对 Zn S粒子结构和形貌的影响。通过 XRD、TEM、DSC等测试手段对 Zn S粒子进行了分析。结果表明 ,所制备的 Zn S纳米粒子粒径很小 (约 2 0 nm) ,晶相单一 ,属于立方晶系 ,分散性较好 ,结晶度、纯度较高 ,活性大 ,具有良好的应用前景 ;密闭高压体系有助于纳米粒子的分散和结晶度、产率的提高 ;与以去离子水作为反应介质相比 ,以甲苯作为反应介质合成的 Zn S纳米粒子纯度更高 ,分散性更好 ,但成本相应提高 ,此外 ,它在乙醇中的稳定性比在去离子水中的稳定性要好 ,粒子极性相对较低
Zinc acetate and sodium thiosulfate were selected as raw materials to carry out oxidation-reduction reaction in “active” water or toluene to prepare ZnS nanoparticles with good quality. The effects of water or toluene as reaction medium on the structure and morphology of ZnS particles were investigated under high temperature and high pressure conditions. The Zn S particles were analyzed by XRD, TEM and DSC. The results show that the prepared Zn S nanoparticles have small particle size (about 20 nm), single crystal phase, cubic system, good dispersibility, high crystallinity, high purity and large activity, and have good application prospects ; Closed high-pressure system is conducive to the dispersion and crystallinity of nanoparticles, the yield increase; compared with deionized water as the reaction medium, the synthesis of toluene as a reaction medium Zn S nanoparticles with higher purity, better dispersion , But at a correspondingly higher cost. In addition, it is more stable in ethanol than in deionized water and has a relatively low particle polarity