摘要
在表面活性剂十六烷基三甲基溴化铵(CTAB)存在时,合成了ZnS光催化剂。采用X射线衍射和透射电子显微镜等测试技术结果表明,制得的ZnS粒子尺寸均一,无团聚现象,平均粒径约为3.5nm。研究了ZnS光催化剂在紫外光下对不同染料的光催化降解效率,结果表明,ZnS光催化剂对一些含—N—N—基团的偶氮类染料,如甲基橙(MO)、酸性嫩黄(AY)、酸性橙Ⅱ(AOⅡ)光催化降解效率高达88%以上,甲基红(MR)的光催化降解效率也达59.63%。表明—N—N—基团容易降解。染料分子本身的吸光性也起一定的作用,虽然二甲酚橙(XO)和亚甲基蓝(MB)分子中均不含—N—N—基团,但由于XO的最大吸收峰分布于430nm的紫外光区,其光催化降解效率可达43.83%,而MB最大吸收峰分布于664nm可见光区,因此,其光催化降解效率则非常低。
ZnS photocatalyst was synthesized in the presence of surfactant cetyltrimethyl ammonium bromide（CTAB）.The results of XRD and TEM indicate that the sizes of the ZnS particles obtained are uniform and there is no aggregation phenomenon.The average size of the ZnS particles is about 3.5 nm.The investigation results of the photodegradation efficiency of the different dyes under the UV light irradiation in the presence of photocatalyst ZnS indicate that the photodegradation efficiency of azo dyes with the NN group,such as methyl orange（MO）,acid yellow（AY） and acid organgeII（AOII） on the ZnS photocatalyst in 60 min is as high as 88%,illustrating that the dyes with the NN group is easy to be degraded.In addition,the light absorption properties of the dye molecules also play a certain role.Both xylenol organge（XO） and methylene blue（MB） molecules do not contain the NN group.However,the photodegradation efficiencies of XO is as high as about 59.63% due to the largest absorption peak of XO located at 430 nm.Whereas the photodegradation efficiencies of MB is very low due to the largest absorption peak of MB located at 664 nm.
出处
《应用化学》
CAS
CSCD
北大核心
2010年第6期705-709,共5页
Chinese Journal of Applied Chemistry
基金
咸阳师范学院专项科研基金(06XSYK260,06XSYK271)
咸阳师范学院大学生科研训练(07071)资助项目
