Imaging Science and Photochemistry ›› 2008, Vol. 26 ›› Issue (2): 138-147.DOI: 10.7517/j.issn.1674-0475.2008.02.138

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Preparation of Three Types of Titanium Dioxides with Different Crystallite and the Photoreactivity

LIU Song-cui, LÜ Kang-le, DENG Ke-jian, TANG Hong-mei, LI Xiao-fang   

  1. Key Laboratory of Catalysis and Materials Science of the State Ethic Affairs Commission & Minsitry of Education, Hubei Province, South-Central University for Nationalities, Wuhan 430074, Hubei, P.R.China
  • Received:2007-06-13 Revised:2007-10-22 Online:2008-03-23 Published:2008-03-23

Abstract: Anatase (AT) nanoplates, club-shaped rutile (RT) and prism-shaped brookite (BT) TiO2 were prepared on a large scale through hydrothermal treatment of Ti(SO4)2 or TiCl4 at certain pH. The mean particle size of the prepared AT was about 10 nm, the smallest one among the three types of TiO2, compared with 30—50 nm of BT and 50—70 nm of BT. The maximum responsive wavelength of AT, BT and RT was to about 375, 385 and 415 nm, respectively, and AT shows the strongest absorption in the range of UV light. The photooxidation activity evaluated from the photocatalytic degradation of X3B, an anionic organic dye, revealed that the relative photoreactivity of the TiO2 samples was as follows: AT>RT>BT, which is consistant with the adsorption ability of the catalysts. The reasons that caused the differences in photoreactivity among the three types TiO2 were also discussed.

Key words: titanium dioxide, crystalline phase, reactive brilliant red X3B, photocatalytic degradation

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