化工新型材料

化工新型材料 ›› 2017, Vol. 45 ›› Issue (9) : 162-165.

科学研究

Cd²⁺-Zn²⁺-Al³⁺-LDHs新型材料的制备、表征及其光催化性能研究

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Preparation and characterization of a new type material Cd²⁺-Zn²⁺-Al³⁺-LDHs and its photocatalytic activity

Liu Jieying¹, Liu Yan², Dang Rui¹, Ma Xiangrong¹, Wu Jia¹, Bai Yanxia¹, Liu Dan¹
Zhang Zhifang¹, Li Ting¹

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Received		Published
2017-03-07		2017-10-19
Issue Date	Revised Date
2017-10-19	2017-03-07

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摘要

以尿素为沉淀剂,以Cd(NO₃)₂·4H₂O、Zn(NO₃)₂·6H₂O、Al(NO₃)₃·9H₂O为原料,采用均相沉淀技术制备了Cd²⁺-Zn²⁺-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Cd²⁺-Zn²⁺-Al³⁺-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Cd²⁺-Zn²⁺-Al³⁺-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%。

Abstract

A new type photocatalytic material of Cd²⁺-Zn²⁺-Al³⁺-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.Cd²⁺-Zn²⁺-Al³⁺-LDHs showed lamelleted plate shape morphology,which the plane size was 3 um and the thickness was about 250nm.The layer spacing of Cd²⁺-Zn²⁺-Al³⁺-LDHs was 0.779nm and its had the higher adsorption performance due to specific larger surface area (132.2m²/g) and uniform distribution of pore structure(15.6nm).Furthermore,Cd²⁺-Zn²⁺-Al³⁺-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 40min,and the degradation rate was almost 98%.Kinetics showed that the catalytic reaction was first order reaction.

关键词

Cd²⁺-Zn²⁺-Al³⁺-LDHs / 表征 / 染料废水 / 光催化

Key words

Cd²⁺-Zn²⁺-Al³⁺-LDHs / characterization / dye wastewater / photocatalysis

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Cd²⁺-Zn²⁺-Al³⁺-LDHs新型材料的制备、表征及其光催化性能研究[J]. 化工新型材料, 2017, 45(9): 162-165 DOI:

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