Study on the photocatalysis performance and degradation kinetics of X-3B over modified titanium dioxide.
In this paper, reactive brilliant X-3B was used as a model compound to study the photocatalytic activity of TiO2. Experimental results showed that the adulteration of iron and silver on TiO2 could greatly improve the activity of TiO2, and the optimum adulteration amount of iron and silver was 0.1 wt.% (Fe/TiO2) and 0.05 wt.% (Ag/TiO2), respectively, at the adulteration range of experiments. The photocatalytic degradation kinetics of X-3B on TiO2, Fe/TiO2 and Ag/TiO2 were also studied. The results showed that the degradation of X-3B on all of them were in accordance with the Langmiur-Hinshelwood kinetics model well, and the sequence of apparent reaction rate constants k of X-3B degradation catalyzed by TiO2, Fe/TiO2 and Ag/TiO2 was Ag/TiO2>Fe/TiO2>TiO2, while adsorption equilibrium constants KA of X-3B on Fe/TiO2 and Ag/TiO2 were approximately the same, and both were greater than that of TiO2.
Qi
Xin-Hua
XH
College of Environmental Science and Engineering of Nankai University, Tianjin 300071, PR China. qixinhua@nankai.edu.cn
Wang
Zhong-Hua
ZH
Zhuang
Yuan-Yi
YY
Yu
Ying
Y
Li
Jia-Ling
JL
D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D007700:Kinetics; D010777:Photochemistry; D013783:Textile Industry; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification
D001391:Azo Compounds; D004396:Coloring Agents; C009495:titanium dioxide; D014025:Titanium