低共熔溶剂辅助水热法合成分层球状微/纳米ZnO晶体及其光催化性能

摘要

使用尿素­氯化胆碱低共熔溶剂( UCC­DES)，采用水热合成和反溶剂(乙醇)法，以化工材质ZnO粉末为原料制备了分层的球状微/纳米ZnO晶体。分析了反应时间、反溶剂的种类和含量对ZnO晶体形貌的影响以及ZnO晶体析出的原因。并将制备的分层球状ZnO微/纳米晶体应用于光催化降解甲基橙。结果表明，制备的ZnO晶体对甲基橙有良好的光催化降解性能。%Multi­layered spherical ZnO micro/nano­crystals were synthesized by means of hydrothermal and antisolvent method from the urea­choline chloride deep eutectic solvent(UCC­DES). The effects of reaction time, amount and concentrations of antisolvents on the morphology of ZnO micro/nano­crystals were investi­ gated, and the formation of ZnO micro/nano­crystals was discussed. Furthermore, the photocatalytic activities of the as­prepared ZnO crystals for the degradation of methyl orange were investigated. The results indicate that multi­layered spherical ZnO micro/nano­crystals exhibit a superior photocatalytic activity. The synthetic method of ZnO is facile, safe and environmentally friendly, it is in line with the requirements of green chemis­ try and should have widespread application in the future.