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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%。
Using Cd (NO 3) 2 · 4H 2 O, Zn (NO 3) 2 · 6H 2 O, Al (NO 3) 3 · 9H 2 O as raw materials and urea as precipitating agent, 2 +) - Al3 + -LDHs New Photocatalytic Materials. On this basis, the structure and performance of new materials were systematically characterized by various analytical techniques. The experimental results show that Cd 2+, Zn 2+, Al 3+ and LDHs are lamellar disk-shaped, with a plane size of 3μm, a thickness of about 250nm and a layer spacing of 0.779 nm. The microscopic pore structure analysis shows that the material has an average pore diameter of 15.6nm, a large specific surface area (132.2m2 / g), a strong adsorption capacity and a narrow band gap (2.36Eg), which is an ideal photocatalyst. Under certain conditions, methylene blue can be effectively degraded by using Cd ~ (2 +) - Zn ~ (2 +) - Al ~ (3 +) - LDHs as photocatalyst. After 40min catalytic reaction, the degradation rate was 98%.