Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (1): 90-98.DOI: 10.1016/S1872-2067(12)60709-8

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Photocatalytic degradation of bisphenol A using Ti-substituted hydroxyapatite

Qian Lia, Xiang Fenga, Xiao Zhanga, Han Songa, Jianwei Zhanga, Jing Shanga, Weiling Suna, Tong Zhua, Masato Wakamurab, Mineharu Tsukadab, Yingliang Luc   

  1. a College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;
    b Environment and Energy Research Center, Fujitsu Laboratories Limited, Atsugi, Japan;
    c Fujitsu Research and Development Center Company Limited, Beijing 100025, China
  • Received:2013-07-22 Revised:2013-09-11 Online:2013-12-23 Published:2014-01-17
  • Contact: Jing Shang
  • Supported by:

    This work was supported by the Fujitsu Laboratories Limited Foundation (k120400), the Beijing Natural Science Foundation (8132035), and the National Natural Science Foundation of China (21277004, 21190051, 41121004).

Abstract:

Ti-substituted hydroxyapatite (TiHAP) is a new photocatalyst with high adsorption capacity and photocatalytic activity. The morphology and structure of TiHAP were characterized using transmission electron microscopy, X-ray diffraction, ultraviolet-visible spectrophotometry, and the zeta potential. The adsorption and photocatalytic degradation of bisphenol A (BPA, an environmental endocrine disrupting chemical) over TiHAP and P25 TiO2 photocatalysts were studied using liquid chromatography-mass spectrometry. The influences of fulvic acid and Fe3+ ions on the BPA degradtion rate were analyzed. The adsorption of BPA on TiHAP and TiO2 obeyed the Langmuir adsorption equation. TiHAP exhibited much higher adsorption capacity and photocatalytic degradation activity of BPA than TiO2. Fulvic acid and Fe3+ showed different effects on the photocatalytic activity of TiHAP and TiO2 films. These were explained by band structure theory, the electron transfer path, and optical absorption capacity. The results are useful for the application of TiHAP in the photocatalytic degradation of environmental endocrine disrupting chemicals.

Key words: Titanium-substituted hydroxyapatite, Photocatalysis, Bisphenol A, Adsorption, Titanium dioxide