Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction

Zhen Wan, Gaoke Zhang, Xiaoyong Wu, Shu Yin

    研究成果: Article査読

    196 被引用数 (Scopus)

    抄録

    We successfully synthesized novel solid state Z-scheme visible-light-driven Bi12GeO20/g-C3N4composite photocatalysts and investigated their photocatalytic activities for degradation of microcystin-LR and RhB, and for reduction of aqueous Cr(VI). The TEM and HRTEM images clearly showed the heterogeneous nanostructures at the interface between Bi12GeO20and g-C3N4. The as-prepared Bi12GeO20/g-C3N4composites exhibited enhanced photocatalytic activities for the degradation of microcystin-LR and RhB aqueous solution and reduction of aqueous Cr(VI) as compared to the pure Bi12GeO20and g-C3N4under visible-light irradiation. On the basis of the radical species trapping experiments and ESR analyses, O2[rad]and h+were confirmed to be the mainly active species involved in the degradation of organic pollutants and this reaction was identified to be an oxygen-induced pathway. Meanwhile, combined with the in situ ATR-FTIR spectroscopy and kinetic isotope effect investigations, the photocatalytic reduction of aqueous Cr(VI) was identified as a proton assisted electron transfer reaction. Moreover, the enhanced photocatalytic activities of the Bi12GeO20/g-C3N4composites can be attributed to the improved photo-absorption properties and effective separation of photo-induced charge carriers caused by the Z-scheme system of the as-prepared Bi12GeO20/g-C3N4composites.

    本文言語English
    ページ(範囲)17-26
    ページ数10
    ジャーナルApplied Catalysis B: Environmental
    207
    DOI
    出版ステータスPublished - 2017

    ASJC Scopus subject areas

    • Catalysis
    • Environmental Science(all)
    • Process Chemistry and Technology

    フィンガープリント 「Novel visible-light-driven Z-scheme Bi<sub>12</sub>GeO<sub>20</sub>/g-C<sub>3</sub>N<sub>4</sub> photocatalyst: Oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル