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

Shen, C., Pang, K., Du, L., & Luo, G. (2017). Green synthesis and enhanced photocatalytic activity of Ce-doped TiO2 nanoparticles supported on porous glass. Particuology, 34, 103-109. https://doi.org/10.1016/j.partic.2017.01.007

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

Chun Shen^{a 1 *}, Kexia Pang ^{a 1}, Le Du ^b *, Guangsheng Luo ^c

a Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
b State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Membrane Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
c State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

10.1016/j.partic.2017.01.007

Volume 34, October 2017, Pages 103-109

Received 30 November 2016, Revised 10 January 2017, Accepted 22 January 2017, Available online 12 June 2017, Version of Record 12 August 2017.

E-mail: shenchun@mail.buct.edu.cn; dule@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

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