摘要
以尿素为沉淀剂,以Cd(NO_3)_2·4H_2O、Zn(NO_3)_2·6H_2O、Al(NO_3)_3·9H_2O为原料,采用均相沉淀技术制备了Cd^(2+)-Zn^(2+)-Al3+-LDHs新型光催化材料。在此基础上,借助各种分析检测技术对新型材料的结构和性能进行了系统的表征。实验研究结果表明Cd^(2+)-Zn^(2+)-Al^(3+)-LDHs为片层状圆盘状形貌,平面尺寸为3μm,厚度约为250nm,层间距为0.779nm。微观孔结构分析表明该材料平均孔径为15.6nm,比表面积较大(132.2m2/g),吸附能力强,禁带宽度窄(2.36Eg),是理想的光催化剂。以Cd^(2+)-Zn^(2+)-Al^(3+)-LDHs作为光催化剂,在一定条件下可以有效降解亚甲基蓝。催化反应40min后,降解率为98%。
A new type photocatalytic material of Cd^（2＋）-Zn^（2＋）-Al^（3＋）-LDHs was prepared by homogeneous precipitation technology,Cd（NO3）2·4H2O,Zn（NO3）2·6H2O and Al（NO3）3·9H2O used as raw materials.The structure and catalytic property of material was systematically characterized by various analytical techniques.Cd^（2＋）-Zn^（2＋）-Al^（3＋）-LDHs showed lamelleted plate shape morphology,which the plane size was 3um and the thickness was about 250 nm.The layer spacing of Cd^（2＋）-Zn^（2＋）-Al^（3＋）-LDHs was 0.779 nm and its had the higher adsorption performance due to specific larger surface area（132.2m^2/g）and uniform distribution of pore structure（15.6nm）.Furthermore,Cd^（2＋）-Zn^（2＋）-Al^（3＋）-LDHs showed the lower band gap（2.36Eg）,which was the excellent catalyst for the degradation of the methylene blue and transformed it to inorganic molecules in 40 min,and the degradation rate was almost 98%.Kinetics showed that the catalytic reaction was first order reaction.
出处
《化工新型材料》
CAS
CSCD
北大核心
2017年第9期162-165,共4页
New Chemical Materials
基金
国家自然科学基金项目(51601167)
陕西省教育厅专项科研计划项目(15JK1851)
陕西省科技厅计划项目(2015SF262
2016SF334)
