Synthesis and Photocatalytic Property of the ZrO2/TiO2 Pillared Laponite

被引:9
|
作者
Lin Yingguang [1 ]
Pi Pihui [2 ]
Yang Zhuoru [2 ]
Wang Lianshi [1 ]
机构
[1] S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
基金
中国博士后科学基金;
关键词
ZrO2/TiO2 pillared laponite; photocatalytic property; intercalation reaction; supercritical fluid drying; MONTMORILLONITE; DEGRADATION; CLAY;
D O I
10.1007/s11595-011-0324-z
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The ZrO2/TiO2 pillared laponite (Ti-Zr-lap) photocatalysts were prepared with intercalation reaction by supercritical fluid drying (SCFD), and characterized by XRD,TEM, SEM and BET surface area analysis, and the photocatalytic properties of Ti-Zr-lap were investigated by degradation of azo dye acid red B (ARB). The results showed that the ZrO2/TiO2 pillared structures in laponite could be formed, with the mass fraction of (Zr4++Ti4+)/laponite (X-m) increasing, the basal spacing and the BET surface area of Ti-Zr-lap significantly increased. The Ti-Zr-lap used as photocatalyst had the advantages of stable and porous layered structure, large surface area with the anatase type TiO2. Compared with the Ti-Zr-lap dried by air drying, the Ti-Zr-lap dried by SCFD showed better photocatalytic property which was very close to that of P25 TiO2. Using the Ti-Zr-lap as photocatalyst with the optimum X-m of 0.16 and the calcination temperature of 500 degrees C, under the conditions of the initial concentration of ARB 20 mg/L, photocatalyst concentration of 1.5 g/L and irradiation time 60 min, the decoloring rate of ARB could achieve 98.3%, indicating that the Ti-Zr-lap had excellent photocatalytic property.
引用
收藏
页码:852 / 856
页数:5
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