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Synthesis and characterization of Ag‐loaded p‐type TiO2 for adsorption and photocatalytic degradation of tetrabromobisphenol A
A p‐type TiO2 with Ti vacancies (D‐TiO2) was synthesized by a facile solvothermal treatment, and Ag/TiO2 with different Ag loading amount was prepared through a photo‐reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D‐TiO2 and Ag/TiO2 were investigated. The adsorption of TBBPA on Ag/TiO2 was significantly enhanced and was five times greater than that of pure TiO2. The increase in pH significantly inhibited the adsorption of TBBPA. The 2%‐Ag/TiO2 nearly completely degraded TBBPA in 10 min under UV–Vis light (λ > 360 nm), and the apparent reaction rate constant (kapp) reached 0.63 min−1. The significantly enhanced UV–Vis light catalytic properties of the Ag/TiO2 in comparison with that of TiO2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO2. Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO2. Moreover, the Ag/TiO2 catalyst exhibits high stability during TBBPA degradation even after three cycles. Ti‐defected TiO2 and Ag/TiO2 were synthesized using a solvothermal and photo‐reduction deposition, respectively. Ag/TiO2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV–Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
Synthesis and characterization of Ag‐loaded p‐type TiO2 for adsorption and photocatalytic degradation of tetrabromobisphenol A
A p‐type TiO2 with Ti vacancies (D‐TiO2) was synthesized by a facile solvothermal treatment, and Ag/TiO2 with different Ag loading amount was prepared through a photo‐reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D‐TiO2 and Ag/TiO2 were investigated. The adsorption of TBBPA on Ag/TiO2 was significantly enhanced and was five times greater than that of pure TiO2. The increase in pH significantly inhibited the adsorption of TBBPA. The 2%‐Ag/TiO2 nearly completely degraded TBBPA in 10 min under UV–Vis light (λ > 360 nm), and the apparent reaction rate constant (kapp) reached 0.63 min−1. The significantly enhanced UV–Vis light catalytic properties of the Ag/TiO2 in comparison with that of TiO2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO2. Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO2. Moreover, the Ag/TiO2 catalyst exhibits high stability during TBBPA degradation even after three cycles. Ti‐defected TiO2 and Ag/TiO2 were synthesized using a solvothermal and photo‐reduction deposition, respectively. Ag/TiO2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV–Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
Synthesis and characterization of Ag‐loaded p‐type TiO2 for adsorption and photocatalytic degradation of tetrabromobisphenol A
Zhang, Yunhai (author) / Zhou, Shuangxi (author) / Su, Xin (author) / Xu, Jimin (author) / Nie, Guangze (author) / Zhang, Yongjun (author) / He, Yide (author) / Yu, Shuili (author)
Water Environment Research ; 92 ; 713-721
2020-05-01
9 pages
Article (Journal)
Electronic Resource
English
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