Synthesis of TiO 2 nanoparticles using novel titanium oxalate complex towards visible light-driven photocatalytic reduction of CO 2 to CH 3OH

Quang Duc Truong, Thi Hang Le, Jen Yu Liu, Cheng Chi Chung, Yong Chien Ling

    Research output: Contribution to journalArticlepeer-review

    71 Citations (Scopus)

    Abstract

    TiO 2 nanoparticles (NPs) with controlled crystalline structure and morphology were synthesized by a facile hydrothermal method using a novel titanium oxalate complex. The structure, morphology, and spectral properties of the synthesized TiO 2 NPs were characterized by X-ray diffraction, Raman spectroscopy, scanning/transmission electron microscopy, and UV-vis diffuse reflectance spectroscopy. The titania phases of anatase, rutile, or brookite can be easily tuned by tailoring the solution pH during reaction. Highly ordered flower-like rutile could be obtained with oxalic acid additive. The synthesized TiO 2 catalysts showed excellent visible light absorption and remarkable photocatalytic activity for CO 2 reduction to CH 3OH under both UV-vis and visible light irradiation, mainly due to doped carbon and nitrogen. Bicrystalline anatase-brookite composite afforded maximum CH 3OH yield, attributed mainly to the unique electrical band structures and efficient charge transfer between the two crystalline phases.

    Original languageEnglish
    Pages (from-to)28-35
    Number of pages8
    JournalApplied Catalysis A: General
    Volume437-438
    DOIs
    Publication statusPublished - 2012 Sep 26

    Keywords

    • CH OH
    • CO reduction
    • TiO nanoparticles
    • Titanium oxalate complex
    • Visible light response

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

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