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首页> 外文期刊>Journal of Materials Science >Visible light-active hybrid film photocatalyst of polyethersulfone-reduced TiO2: photocatalytic response and radical trapping investigation
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Visible light-active hybrid film photocatalyst of polyethersulfone-reduced TiO2: photocatalytic response and radical trapping investigation

机译：可见光活性混合膜光催化剂的聚醚砜减少TiO2：光催化反应和自由基捕获调查

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摘要

The present work emphasizes the facile synthesis and characterization of reduced TiO2-polyethersulfone and evaluation of its visible light photocatalytic response. Reduced TiO2 (rTiO(2)) was prepared by a simple thermal reduction of NaBH4 at 300 A degrees C for 50 min before immobilized into polyethersulfone polymer film via phase inversion. X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray characterization showed the photoactive rTiO(2) was still intact onto the PES with homogeneous dispersion after the preparation process. The incorporation of rTiO(2) was observed to improve the hydrophilicity and film's surface roughness up to 7.03 nm. X-ray photoelectron spectroscopy confirmed the formation of interstitial site of rTiO(2) at lower binding energies of 456.1 and 461.8 eV, which extends visible light absorption by either the existence of Ti3+ species or oxygen vacancies. The low band gap (2.85 eV) of the film photocatalyst synergistically envisages the best degradation performance at 13 wt% of rTiO(2) loading by degrading 100% methyl orange in acidic conditions. Based on pseudo-first-order kinetic model, the highest degradation rate constant of 1.41 x 10(-3) min(-1) was obtained with center dot O-2 (-) acted as the main active species during the process. The reusability studies revealed that the film photocatalyst could be repeatedly used for up to five times without severe deactivation.
机译：本作本作强调了减少TiO 2 - 聚醚砜的容易合成和表征，并评估其可见光光催化反应。通过在通过相倒反相将NaBH 4的NaBH 4在300℃下的NaBH 4在300℃下的NaBH 4的简单的热还原制备减少的TiO 2（RTIO（2））。 X射线衍射，扫描电子显微镜和能量分散X射线表征显示光活性RTIO（2）在制备过程后仍然完整于具有均匀分散的PE上。观察到RTIO（2）的掺入，以改善亲水性和薄膜的表面粗糙度，高达7.03nm。 X射线光电子能谱证实，在456.1和461.8eV的较低结合能下，在456.1和461.8 eV的较低结合能中形成了间隙位点，其通过存在Ti3 +物种或氧空位的存在延伸了可见光吸收。薄膜光催化剂的低频带隙（2.85eV）协同内容通过在酸性条件下降解100％甲基橙，在13wt％的RTIO（2）负荷下以13wt％的RTIO（2）负荷的最佳降解性能。基于伪第一阶动力学模型，使用中心点O-2（ - ）作为主要活性物种，获得1.41×10（-3）分钟（-1）的最高降解速率常数。可重用性研究表明，薄膜光催化剂可以重复使用多达五次而不会严重停用。

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  • 来源
    《Journal of Materials Science》 |2018年第18期|共16页
  • 作者

    Hir Zul Adlan Mohd; Abdullah Abdul Halim; Zainal Zulkarnain; Lim Hong Ngee;

  • 作者单位

    Univ Putra Malaysia Inst Adv Technol Mat Synth &

    Characterizat Lab Upm Serdang 43400 Selangor Malaysia;

    Univ Putra Malaysia Inst Adv Technol Mat Synth &

    Characterizat Lab Upm Serdang 43400 Selangor Malaysia;

    Univ Putra Malaysia Fac Sci Dept Chem Upm Serdang 43400 Selangor Malaysia;

    Univ Putra Malaysia Fac Sci Dept Chem Upm Serdang 43400 Selangor Malaysia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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