Cu-doped TiO2 brookite photocatalyst with enhanced visible light photocatalytic activity

• Autorzy: Zou Yunling , Huang Xianshou , Yu Tao , Tong Xiaoqiang , Li Yan , Lian Xiaoxue , Xie Yao , Huang Jiaming , He Wei , Li Wenxin

Identyfikatory

DOI

10.2478/msp-2020-0074

• Języki publikacji: EN

Abstrakty

EN

Cu-doped TiO₂ having a brookite phase and showing enhanced visible light photocatalytic activity was synthesized using a mild solvothermal method. The as-prepared samples were characterized by various techniques, such as X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy. Photocatalytic activity of Cu-doped brookite TiO₂ nanoparticles was evaluated by photodegradation of methylene blue under visible light irradiation. The X-ray diffraction analysis showed that the crystallite size of Cu-doped brookite TiO₂ samples decreased with the increase of Cu concentration in the samples. The UV-Vis diffuse reflectance spectroscopy analysis of the Cu-doped TiO₂ samples showed a shift to lower energy levels in the band gap compared with that of bare phase brookite TiO₂. Cu doped brookite TiO₂ can obviously improve its visible light photocatalytic activity because of Cu ions acting as electron acceptors and inhibiting electron-hole recombination. The brookite TiO₂ sample with 7.0 wt.% Cu showed the highest photocatalytic activity and the corresponding degradation rate of MB (10 mg/L) reached to 87 % after visible light illumination for 120 min, much higher than that of bare brookite TiO₂ prepared under the same conditions (78 %).

Słowa kluczowe

EN

TiO2; brookite; copper; solvothermal method; photocatalytic activity

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 4
• Strony: 644--653
• Opis fizyczny: Bibliogr. 48 poz., rys.

Twórcy

autor

Zou Yunling

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Huang Xianshou

• School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, P.R. China

autor

Yu Tao

• School of Chemical Engineering, Tianjin University, Tianjin 300072, P.R. China

autor

Tong Xiaoqiang

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Li Yan

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Lian Xiaoxue

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Xie Yao

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Huang Jiaming

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

He Wei

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

autor

Li Wenxin

• College of Science, Civil Aviation University of China, Tianjin 300300, P.R. China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).