Photocatalytic degradation of formaldehyde using mesoporous TiO2 prepared by evaporation-induced self-assembly
来源期刊：中南大学学报(英文版)2014年第11期
论文作者：LI Cheng-yong(黎成勇) JIA Yan-rong(贾艳荣) ZHANG Xiang-chao(张向超) ZHANG Shi-ying(张世英) TANG Ai-dong(唐爱东)
文章页码：4066 - 4070
Key words：mesoporous TiO2; photocatalysis; formaldehyde; evaporation induced self assembly (EISA)
Abstract: The mesoporous TiO2 has been synthesized by evaporation induced self assembly (EISA) method. The thermo- gravimetric/differential scanning calorimetric (TG/DSC), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM) and N2 adsorption desorption and adsorption are used to study the effects of the synthesized process condition on the microstructure of the as-synthesized mesoporous TiO2. The photocatalytic performances of as-synthesized samples are evaluated by the degradation of the formaldehyde under ultraviolet light irradiations. The results demonstrate that the as-synthesized mesoporous TiO2 are anatase with the uniform size about 20-40 nm. The sample is prepared using cetyltrimethyl ammonium bromide (CTAB) as the template with average pore size distribution of 8.12 nm, specific surface area of 68.47 m2/g and pore volume of 0.213 mL/g. The samples show decomposition of formaldehyde 95.8% under ultraviolet light irradiations for 90 min. These results provide a basic experimental process for preparation mesoporous TiO2, which will posses a broad prospect in terms of the applications in improving indoor air quality.
LI Cheng-yong(黎成勇)1, JIA Yan-rong(贾艳荣)1, 2, ZHANG Xiang-chao(张向超)1, ZHANG Shi-ying(张世英)1, TANG Ai-dong(唐爱东) 2
(1. Institute of New Materials, Department of Biological Engineering and Environmental Science,
Changsha University, Changsha 410003, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China)
Abstract:The mesoporous TiO2 has been synthesized by evaporation induced self assembly (EISA) method. The thermo- gravimetric/differential scanning calorimetric (TG/DSC), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM) and N2 adsorption desorption and adsorption are used to study the effects of the synthesized process condition on the microstructure of the as-synthesized mesoporous TiO2. The photocatalytic performances of as-synthesized samples are evaluated by the degradation of the formaldehyde under ultraviolet light irradiations. The results demonstrate that the as-synthesized mesoporous TiO2 are anatase with the uniform size about 20-40 nm. The sample is prepared using cetyltrimethyl ammonium bromide (CTAB) as the template with average pore size distribution of 8.12 nm, specific surface area of 68.47 m2/g and pore volume of 0.213 mL/g. The samples show decomposition of formaldehyde 95.8% under ultraviolet light irradiations for 90 min. These results provide a basic experimental process for preparation mesoporous TiO2, which will posses a broad prospect in terms of the applications in improving indoor air quality.
Key words:mesoporous TiO2; photocatalysis; formaldehyde; evaporation induced self assembly (EISA)
