Facile synthesis and photocatalytic properties of TiO2 nanoparticles supported on porous glass beads

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 209; pp. 478 - 485
• Main Authors: Shen, C., Wang, Y.J., Xu, J.H., Luo, G.S.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 15.10.2012; Elsevier
• Subjects: Applied sciences; Beads; Catalysis; Catalysts; Catalytic reactions; Chemical engineering; Chemistry; Controllable and green synthesis; Degradation; Energy gaps (solid state); Exact sciences and technology; General and physical chemistry; Glass; Ion exchange; methyl orange; Nanoparticles; Photocatalytic; Porous glass beads; Reactors; Supported TiO2 nanoparticles; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Titanium; Titanium dioxide; Photocatalytic; Controllable and green synthesis; Supported TiO2 nanoparticles; Porous glass beads; Supported TiO; Nanoparticle; In situ; Photocatalysis; Immobilization; Porous glass; Calcining; nanoparticles; Loading; Preparation; Ion exchange; Titanium oxide; Catalyst
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2012.08.044

[Display omitted] ► A novel immobilization method for highly dispersed TiO2 nanoparticles has been developed. ► The loading amount of Ti ranges from 0.08wt.% to 4.55wt.%. ► The mean diameter of the TiO2 nanoparticles varied from 3.8 to 5.3nm. ► The as-prepared catalyst showed excellent photocatalytic performance for the degradation of MO. This paper presents a novel immobilization method for the preparation of highly dispersed TiO2 nanoparticles supported on porous glass beads. The method involves an in situ ion exchange process and a calcination process. Mono-dispersed TiO2 nanoparticles exhibiting the anatase phase with different mean diameter and different loading amount have been successfully prepared through the controllable and green way. With the increase of loading amount of Ti from 0.08wt.% to 4.55wt.%, the mean diameter of the TiO2 nanoparticles varied from 3.8 to 5.3nm. And the band gaps of the TiO2 nanoparticles with the highest and lowest loading amount are 3.25 and 3.00eV, respectively. The prepared TiO2 nanoparticles supported on porous glass beads showed excellent photocatalytic performance for the degradation of methyl orange (MO). For the catalyst with a Ti content of 0.08wt.%, when the dosage was 1.93e−5g/mL, 65% of the total MO decomposed after 30min; for the catalyst with a Ti content of 2.56wt.%, when the dosage reached 0.81e−3g/mL, complete degradation was observed.