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Partic. vol. 34 pp. 103-109 (October 2017)
doi: 10.1016/j.partic.2017.01.007

Green synthesis and enhanced photocatalytic activity of Ce-doped TiO2 nanoparticles supported on porous glass

Chun Shena, *, Kexia Panga, Le Dub, *, Guangsheng Luoc

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shenchun@mail.buct.edu.cndule@mail.buct.edu.cn

Highlights

    • Immobilized Ce-doped TiO2 nanoparticles were synthesized through a green way. • Ce-doped TiO2 nanoparticles showed the mean particle size of 4.8 nm. • The rate constant for MO degradation was 0.095 min−1 under visible light. • The rate constant for RhB degradation was 0.230 min−1 under visible light.

Abstract

A facile and green method to prepare Ce-doped TiO2 nanoparticles supported on porous glass beads is reported. An ion exchange process and subsequent calcination yielded Ce-doped TiO2 nanoparticles with a mean size of 4.8 ± 0.3 nm. The nanoparticles were dispersed on the surface of porous glass beads. The addition of Ce enhanced the visible light absorption of the TiO2 nanoparticles in the 400–500 nm spectral window. The band gap of the as-prepared catalyst was 2.80 eV. The Ce-doped TiO2 nanoparticles immobilized on porous glass beads exhibited excellent photocatalytic activity for the visible-light-degradation of methyl orange (MO) and rhodamine B (RhB); with rate constants of 0.095 and 0.230 min−1; respectively. The effects of Ce dosage; reaction duration; and initial solution pH on the conversion of MO and RhB dyes were investigated. The green synthesis and favorable photocatalytic activity makes the Ce-doped TiO2 nanoparticles immobilized on porous glass an attractive alternative for the efficient degradation of organic pollutants.

Graphical abstract

Keywords

Ce-doped TiO2 catalyst; Supported nanoparticles; Porous glass beads; Photocatalytic degradation