Eu-doped TiO2 nanoparticles with enhanced activity for CO2 phpotcatalytic reduction. (July 2018)

• Record Type: Journal Article
• Authors: Huang, Chun-ying; Guo, Rui-tang; Pan, Wei-guo; Tang, Jun-ying; Zhou, Wei-guo; Qin, Hao; Liu, Xing-yu; Jia, Peng-yao
• Is Part Of: Journal of CO₂ utilization. Volume 26(2018)
• Page Start: 487
• Page End: 495
• Publication Date: 2018-07
• Subjects: Eu-doped TiO2 -- Nanoparticles -- Europium oxide -- CO2reduction; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2018.06.004
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: Eu-doped TiO2 nanoparticles were synthesized by hydrothermal method. Eu-TiO2 catalyst was used for photocatalytic CO2 reduction with H2 O under visible light irradiation. The optimized photocatalyst demonstrates much higher CH4 and CO yields than TiO2 . Abstract: The Eu-doped TiO2 nanoparticles were successfully prepared by a simple sol-gel method. The properties of the catalysts were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive spectrometer (EDS), N2 adsorption-desorption, UV–vis diffuse reflectance and photoluminescence (PL) spectroscopy. The results indicated that Eu-TiO2 catalysts had a high specific surface area, enhanced visible light response and low recombination rate of electron-hole pairs. The photocatalytic performances of Eu-TiO2 catalysts for CO2 reduction were investigated under 9 h irradiation of a 300 W Xe arc lamp. The maximum yields of CH4 and CO over the optimized Eu-TiO2 catalyst were 65.53 μmol/g.cat and 42.91 μmol /g.cat, respectively, which were approximately 13 times and 1 times higher than that of pure TiO2 . The enhanced photocatalytic performance could be ascribed to the high-efficiency separation of photo-generated electron-hole pairs.