摘要
本文采用纳米氧化锌与聚氯乙烯溶液共混制备了复合材料前驱体,运用TG-DTA联机分析得到了其分解温度及相关热分解数据;经适当温度煅烧后得到复合材料光催化剂,并用TEM、XRD、FTIR、UV-Vis、ESR对复合材料进行分析表征。在室内普通照明用荧光灯作用下,以甲基橙溶液为催化对象,对复合材料的光催化性能进行了检测,并在相同条件下,与纳米氧化锌、纳米氧化钛及聚氯乙烯直接煅烧产物的光催化性能进行了比对分析;同时研究了pH值对复合材料光催化性能的影响。研究结果表明,复合材料对甲基橙催化降解8min后,甲基橙溶液的降解率接近100%,使用纳米氧化锌、纳米氧化钛和聚氯乙烯直接煅烧产物催化的甲基橙溶液的浓度基本没有变化;溶液偏中性有利于甲基橙的催化降解。
Composite precursor was synthesized by mixing nanometer ZnO and polyvinyl chloride solution, decomposition temperature and relative thermal decomposition were obtained by TG-DTA analysis. The target composite was prepared by calcinating the precursor at appropriate temperature according to the results of TG-DTA analysis. TEM, XRD, FTIR, UV-Vis, ESR were used to analyze the composite. Under the irradiation of fluorescence lamp, the photoeatalytic property of composite were tested and compared with that of pure nanometer ZnO, pure nanometer TiO2 and the product of pure PVC by direct calcination. The influence of initial pH value on the degradation efficiency of methyl orange （MO） was also studied. Photocatalytic experiments indicated that after 8 minutes the decolorization proportion of methyl orange was 100% when using composite, while the decolorization proportion was nearly 0% when using pure nanometer ZnO, pure nanometer TiO2 and the product of pure PVC by direct calcination. The results also show that at pH 6.16 the maximum photocatalytic effect is achieved and increasing or decreasing the pH values will decrease the photodegradation effect.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第5期872-876,共5页
Chinese Journal of Inorganic Chemistry
基金
上海纳米科技专项基金资助项目(No.0252nm011
0552nm042)
关键词
纳米氧化锌
聚氯乙烯
复合材料
光催化
nanometer ZnO
polyvinyl chloride
composite
photocatalyse
