反应介质对溶剂热法合成CuS晶体的影响

以氯化铜、硫脲为反应物，通过溶剂热法合成了具有不同形貌的微纳米分级结构CuS晶体，研究了不同反应介质对材料的形貌、晶体结构以及反应产量等的影响。结果表明，以N，N-二甲基甲酰胺（DMF）为溶剂，可以得到微米级六角花状CuS晶体，以乙二醇或者水/DMF混合物为溶剂，得到的CuS晶体为微米球花状，CuS晶体的产量随着溶剂中水所占比例的增大，呈现先上升后下降的结果，当V_DMF：V_H2O=1：1时得到CuS的最大产量，为理论产量的64.5%。当V_DMF：V_H2O=2：1时得到的CuS晶体具有良好的光催化活性，能够在氙灯模拟的自然光照射2.5 h以内使罗丹明B污染物溶液的脱色率达到96.7%。

Effect of Reaction Medium on Solvothermal Synthesis of CuS Crystals

In this work, micron CuS crystals were successfully prepared by solvothermal route with CuCl₂·2H₂O and CH₄N₂S as the reactant, and the effect of different reaction medium on the morphology, crystal structure and the yield of the synthesized CuS crystals had been investigated. The result show that the CuS crystals prepared with the N,N-dimethylformamide (DMF) as solvent were micron-scale hexagonal flower like shape crystals. And the micron flower-like CuS crystals were synthesized by using the ethylene glycol or the mixture with DMF and deionized water as solvent. With the increase of the proportion of water in the solvent, the yield of CuS crystal increases first and then decreases. The max yield of 64.5% was achieved when the ratio of V_DMF:V_H2O is 1:1. The CuS crystals obtained with V_DMF:V_H2O=2:1 show good photocatalytic activity and the decolorized rate of rhodamine B pollutant solution can reach 96.7% under the natural light irradiation simulated by xenon lamp in 2.5 h.