Beijing Univ Chem Technol, Key Lab Sci & Technol Controllable Chem React, Minist Educ, Beijing 100029, Peoples R China
; Beijing Univ Chem Technol, Coll Sci, Beijing 100029, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100083, Peoples R China
The nanometer anatase titania powder with different size was prepared by high-temperature (360 similar to 850 degreesC) calcination of the precipite synthesized by heating the mixed solution of titanium disulfate and polyethylene glycol (PEG1000) in the presence of urea under hydrothermal conditions at 104 degreesC. The nanometer anatase titania powder and the K-edge fine structure of Ti atom sites were characterized by XRD, BET and EXAFS, and its photocatalytic activity for phenol degradation was investigated. The powder samples dried at room temperature and calcined at below 850 degreesC were anatase phase, and no rutile appeared all the time. The results showed that the obtained nanometer anatase titania powder was very stable. The crystallite size increased from 8.56 to 48.82 rim, but the specific surface area decreased from 195.28 to 36.12 m(2)/g with the increase of calcination temperature from room temperature to 850 degreesC. The EXAFS result showed that the order of the lattice increased with the increase of the nanoparticle size, based on that the coordination number increased for the first-shell, the second-shell and the third-shell as well as the relative intensity of K-preedge peaks A(1), A(2) and A(3) increased. The nanometer anatase titania powder with the particle size of 15 similar to 20 nm had higher photocatalytic activity, for phenol degradation.
; Chemistry, Physical
; Engineering, Chemical
Yang, R,Li, M,Zhang, JC,et al. Fine structure of nanometer anatase titania powder and its photocatalytic activity for phenol degradation[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(8):629-634.
Yang, R.,Li, M.,Zhang, JC.,Cao, WL.,Hu, TD.,...&张静.(2003).Fine structure of nanometer anatase titania powder and its photocatalytic activity for phenol degradation.CHINESE JOURNAL OF CATALYSIS,24(8),629-634.
Yang, R,et al."Fine structure of nanometer anatase titania powder and its photocatalytic activity for phenol degradation".CHINESE JOURNAL OF CATALYSIS 24.8(2003):629-634.