摘要
采用水热合成法制备纳米氧化锌材料,并用所制备的纳米材料光催化降解罗丹明B溶液,以罗丹明B的降解率作为评价方式,考察了醋酸锌与柠檬酸的比例、无水乙醇的用量、水热反应温度和pH对氧化锌光催化性能的影响,通过正交试验优化了制备条件。运用XRD和SEM对制备的样品进行了表征。结果表明:pH对氧化锌光催化性能的影响最大,水热反应温度次之,醋酸锌与柠檬酸的比例最小;而且醋酸锌与柠檬酸的比例=2∶1,无水乙醇20mL,T=140℃时,pH=11,样品的光催化活性最高,20mg/L的罗丹明B在紫外光下降解率达90%以上。
Nano zinc oxide（ZnO） materials, prepared by the method of hydrothermal synthsis, were used for photocatalytic degredation of Rhodamine B and the degredation rate of Rhodamine B was estimated. The influencing factors of photocatalytic performance, including ratio of two reagents[Zinc acetate（CH3COO）2 Zn and citric acid（C6H8O7 ）], use level of anhydrous ethanol, hydrothermal reaction temperature, pH value in the preparation process of ZnO was investigated respectively. These factors were optimized via orthogonal test. Prepared samples were tested by XRD and SEM. It was concluded that pH value had the most significant effect on photocatalytic performance of ZnO, followed factors were reaction temperature and ratio of reagents. The best photocatalytic activity of ZnO samples was got under the condition of reagents ratio[（CH3COO）2Zn： C6 H8O7 =2： 1], Anhydrous ethanol 20 mL, reaction temperature T=140℃, pH=11. The degredation rate of 20mg/L Rhodamine B was above 90% under UV irradiation.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第1期173-175,181,共4页
New Chemical Materials
基金
山西省基础研究项目青年科技研究基金(2014021034-2)
关键词
水热合成法
纳米材料
氧化锌
光催化
降解
hydrothermal method, nanomaterial, zinc oxide, photocatalysis, degradation
