A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium n-butoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder diffraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a rutile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80:20, which is beneficial to the effective separation of the photogenerated electron-hole pairs.
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Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Fei, Bin
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Deng, Zhaoxiang
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Deng, Zhaoxiang
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Xin, John H.
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Xin, John H.
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Zhang, Yihe
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Zhang, Yihe
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Pang, Geoffrey
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
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Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Fei, Bin
;
Deng, Zhaoxiang
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Deng, Zhaoxiang
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Xin, John H.
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Xin, John H.
;
Zhang, Yihe
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China
Zhang, Yihe
;
Pang, Geoffrey
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机构:Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China