Hybrid Bi2SiO5 mesoporous microspheres with light response for environment decontamination

Ling Zhang, Wenzhong Wang, Songmei Sun, Jiehui Xu, Meng Shang, Jia Ren

    研究成果: Contribution to journalArticle査読

    48 被引用数 (Scopus)

    抄録

    A hybrid mesostructured photocatalyst prepared by using the " postsynthetic modification" approach with the periodic mesoporous organosilicas (PMO) framework and bismuth nitrate was studied. The morphology and structure of the hybrid Bi2SiO5 photocatalyst were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption-desorption isotherms. These results of characterization show that the as-prepared Bi2SiO5 keeps a semi-ordered mesostructure as the PMO framework. The results of density functional theory calculations indicated that the conduction band bottom of Bi2SiO5 mainly consist of Bi 6s orbits and O 2p, O 2s, while the valence band top mainly consist of Si 3p, O 2p, and Bi 5d orbits. The as-prepared Bi2SiO5 exhibited efficient photocatalytic activity in the decomposition of a widely used dye, tetraethylated rhodamine (RhB), and phenol in water under the simulative sunlight irradiation. Further, the photocatalytic experiment results show that the hybrid Bi2SiO5 synthesized based on PMO was more efficient than the pure mesoporous Bi2SiO5 in decomposing the organic pollutant, which means the hybrid organic groups dispersed in the PMO framework is advantageous to improve the efficiency of the photocatalyst.

    本文言語英語
    ページ(範囲)97-101
    ページ数5
    ジャーナルApplied Catalysis B: Environmental
    100
    1-2
    DOI
    出版ステータス出版済み - 2010

    All Science Journal Classification (ASJC) codes

    • 触媒
    • 環境科学(全般)
    • プロセス化学およびプロセス工学

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