纳米Ce-ZnO催化降解酸性染料条件优化及回收利用  

Optimization of Conditions for Catalysis and Degradation of Acid Dyes by Nano Ce-ZnO and Recovery Utilization thereof

作　　者：于占云 陈宇伦 戴宇斌 袁馨怡 倪韦韦 宋茹 YU Zhanyu;CHEN Yulun;DAI Yubin;YUAN Xinyi;NI Weiwei;SONG Ru(School of Food Science and Pharmaceutics,Zhejiang Ocean University,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学食品与医药学院

出　　处：《现代纺织技术》2019年第6期74-78,共5页Advanced Textile Technology

基　　金：浙江省公益计划研究农业项目(2016C32066);2017年国家级大学生创新创业训练计划项目(201710640004)

摘　　要：掺杂稀土元素Ce制备纳米Ce-ZnO催化剂,以甲基橙溶液为酸性染料代表,对纳米Ce-ZnO催化降解甲基橙条件进行优化,并对催化剂的回收循环使用效果进行研究。在催化时间为3 h条件下,通过正交试验确定纳米Ce-ZnO催化降解甲基橙溶液的最佳条件为催化温度25℃,甲基橙溶液pH 2,催化剂添加量1.0 g/L。在最优催化条件下,纳米Ce-ZnO对3×10^-5 mol/L甲基橙溶液的降解率达到90%左右,对不同浓度(1×10^-5、3×10^-5 mol/L和5×10^-5 mol/L)甲基橙溶液的降解均符合一级动力学方程。以聚偏二氯乙烯(PVDC)膜为载体,键合Ce-ZnO制备的Ce-ZnO/PVDC膜材料对3×10^-5 mol/L甲基橙溶液的降解率提高到95%以上,且循环3次使用后对甲基橙溶液的催化降解率保持在70%左右。因此,纳米Ce-ZnO催化剂及其PVDC膜材料在降解酸性染料方面有进一步开发应用前景。In this study, Nano Ce-ZnO catalyst was prepared by doping rare earth element Ce. Methyl orange solution was taken as representative acid dyes to optimize the conditions for Nano Ce-ZnO catalyzing and degrading methyl orange, as wellas the effect on recycle times of the catalyst was evaluated. For the case of 3-hour catalyst time, the optimal conditions for Nano Ce-ZnO catalyzing and degrading methyl orange solution determined via orthogonal test are: catalytic temperature of 25 ℃, methyl orange solution of pH 2, and catalyst addition of 1.0 g/L. Under the optimum catalytic conditions, the degradation rate of 3×10^-5 mol/L methyl orange solution reached about 90% by Nano Ce-ZnO catalyst, and the degradation of methyl orange solution of different concentrations(1×10^-5, 3×10^-5 mol/L, and 5×10^-5 mol/L) all complies with first-order kinetic equations. The degradation rate of methyl orange solution by Ce-ZnO/PVDC membrane material prepared by bonding Ce-ZnO with polyvinylidene chloride(PVDC) membrane as carrier was raised to above 95%, and the catalytic degradation rate still remained around 70% even after three recycles. Therefore, the Nano Ce-ZnO catalyst and its PVDC membrane materials have potential development prospect in degradation of acid dyes.

关 键 词：纳米ZNO 稀土元素CE 甲基橙溶液 降解 PVDC膜 

分 类 号：TS190.2[轻工技术与工程—纺织化学与染整工程] X788[轻工技术与工程—纺织科学与工程]