超声化学法合成Zn_5(OH)_8Cl_2·H_2O以及高温转化ZnO和光催化性能研究

Sonochemical fabrication of Zn_5(OH)_8Cl_2·H_2O and its conversion into ZnO,photocatalytic performance

在室温条件下,以锌粉1g、四氯化碳10mL和纯净水2 mL为比例,使用超声法制备出了Zn5(OH)8Cl2·H2O纳米片。探究了超声环境下Zn5(OH)8Cl2·H2O的生长机理,并对产物的形貌和结构进行了表征。研究了温度对Zn5(OH)8Cl2·H2O转化为ZnO的影响,发现产物在600℃下完全转化为六方结构纤锌矿ZnO,且高温有助于规则ZnO六方棱柱晶体的形成。使用Zn5(OH)8Cl2·H2O对初始浓度为20mg/L的甲基橙溶液进行光催化降解,结果表明,在15min时降解效率达到98.63%,30 min完全降解。

The used zinc powder 1 g,CCl410 mL and pure water 2 mL with a ration to synthesize Zn5(OH)8Cl2·H2O nanosheets assisted with ultrasonic irradiation at room temperature.The study describes growth mechanism of Zn5(OH)8Cl2·H2O as well as the evolution into ZnO during calcinations.The morphology and the structure of the Zn5(OH)8Cl2·H2O were characterized by field emission scanning electron microscopy(FESEM)and X-ray diffraction analysis(XRD).Its proved high temperature was benefit to the formation of regular ZnO crystals.During photodegradation of methyl orange(20mg/L),it achieved 98.63% at 15 min by using Zn5(OH)8Cl2·H2O as photocatalyst,and the degradation efficiency reached 100% at 30 min.