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Photocatalytic Degradation of Acetaldehyde on Mesoporous TiO2: E?ects of Surface Area and Crystallinity on the Photocatalytic Activity
Xiao-xing Fan, Tao Yu*,Yin Wang,Lin Gao, Li-zhi Zhang, Xin-yi Chen, Zhi-gang Zou
Author NameAffiliationE-mail
Xiao-xing Fan Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstru  
Tao Yu* Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, China Central Normal University, Wuhan 4300 yutao@nju.edu.cn 
Yin Wang Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstru  
Lin Gao Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstru  
Li-zhi Zhang Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstru  
Xin-yi Chen Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China; National Laboratory of Solid State Microstru  
Zhi-gang Zou Eco-materials and Renewable Energy Research Center, Department of Physics, Nanjing University, Nanjing 210093, China; Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, China Central Normal University, Wuhan 4300  
Abstract:
"Mesoporous TiO2 powder and films with worm-like channels were synthesized by an evaporation-induced self-assembly approach. The as-prepared samples were calcined at different temperature to investigate the effect of calcined temperature on the mesostructure and the photocatalytic activity. Acetaldehyde photodegradation in gas phase was employed to evaluate the photocatalytic activity of mesoporous TiO2. Results showed that all the calcined powder samples exhibited higher photocatalytic activities than that of Degussa P25. The sample calcined at 400 oC, which showed higher activity than other samples, possessed a homogeneous pore diameter of about 6.0 nm and an 11.0 nm crystalline anatase pore wall, as well as large surface area of 117 m2/g. It was speculated that two factors of surface area and crystallinity affected the photocatalytic activity of mesoporous TiO2 photocatalyst. The mesoporous TiO2 films fabricated by spin-coating also had high photocatalytic activities."
Key words:  Mesoporous TiO2, Photocatalysis, Acetaldehyde, Photodegradation
FundProject:
介孔二氧化钛光催化降解乙醛及其影响因素
范晓星,于涛*,王英,高玲,张礼知,陈新益,邹志刚
摘要:
"应用溶剂蒸发自组装的方法合成了具有蠕虫状孔道的介孔二氧化钛粉末和薄膜.考察了不同焙烧温度对材料介孔结构和光催化性能的影响.乙醛光催化降解实验用来表征不同焙烧温度下介孔材料的光催化性能.结果表明实验中合成的介孔二氧化钛材料的光催化活性明显高于颗粒二氧化钛(Degussa P25).其中400 oC焙烧的样品具有平均孔径为6.0 nm的窄的孔径分布和117 m2/g的大的比表面积.通过对光催化活性结果的分析,发现介孔二氧化钛的活性主要受其比表面积和结晶性的共同影响.对介孔二氧化钛薄膜材料进行了同样的光催化表
关键词:  介孔,二氧化钛,光催化,乙醛,光降解
DOI:10.1088/1674-0068/20/06/733-738
分类号: