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Acceleration effects of phosphate modification on the decay dynamics of photo-generated electrons of TiO_2 and its photocatalytic activity

机译：磷酸盐改性对TiO_2光生电子衰减动力学的加速作用及其光催化活性

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摘要

The surface modification with a proper amount of phosphate accelerates the dynamic decay of photogenerated electrons in the nanocrystalline anatase TiO_2 film in the presence of O_2, consequently prolonging greatly the lifetime of photogenerated holes so as to improve the charge separation of TiO_2 and then its photocatalytic activity for degrading gas-phase acetaldehyde and liquid-phase phenol mainly based on the transient absorption spectra and the measurements of electrochemical O_2 reduction and the produced hydroxyl radical amount. The acceleration effects are attributed to the increased amount of adsorbed O_2 by means of the curves of O_2 temperature-programmed desorption.
机译：在存在O_2的情况下，用适量的磷酸盐进行表面改性可加速纳米晶锐钛矿型TiO_2薄膜中光生电子的动态衰减，从而大大延长了光生空穴的寿命，从而改善了TiO_2的电荷分离，进而改善了其光催化活性。主要基于瞬态吸收光谱，电化学O_2还原反应和产生的羟基自由基量的测定，制备气相乙醛和液相苯酚。加速作用归因于通过O_2程序升温脱附曲线获得的O_2吸附量的增加。

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  • 来源
    《Chemical Communications》 |2012年第87期|p.10775-10777|共3页
  • 作者

    Liqiang Jing; Yue Cao; Haiqin Cui; James R. Durrant; Junwang Tang; Dening Liu; Honggang Fu;

  • 作者单位

    Key Lab of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, Harbin 150080, P. R. China ,Department of Chemistry, Imperial College London, Exhibition Road, London SW7 2AZ, UK;

    Key Lab of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, Harbin 150080, P. R. China;

    Key Lab of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, Harbin 150080, P. R. China;

    Department of Chemistry, Imperial College London, Exhibition Road, London SW7 2AZ, UK;

    Department of Chemical Engineering, University College London, Torrington WC1E London Place 7JE, UK;

    Key Lab of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, Harbin 150080, P. R. China;

    Key Lab of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, Harbin 150080, P. R. China;

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  • 入库时间 2022-08-17 13:21:03

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