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首页> 外文期刊>Journal of Applied Polymer Science >Fly ash supported photocatalytic nanocomposite poly(3,4-ethylenedioxythiophene)/TiO2 for azo dye removal under simulated solar irradiation
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Fly ash supported photocatalytic nanocomposite poly(3,4-ethylenedioxythiophene)/TiO2 for azo dye removal under simulated solar irradiation

机译：粉煤灰负载光催化纳米复合材料聚（3,4-乙二氧基噻吩）/ TiO2在模拟太阳辐照下去除偶氮染料

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The main objective of this study was to develop a supported photocatalyst for wastewater treatment with extended efficiency under solar light. For that purpose titanium dioxide (TiO2) was immobilized by sol-gel synthesis on the surface of the waste fly ash (FA). On such prepared composite material, conductive polymer poly(3,4-ethylenedioxythiophene) was grafted by in situ chemical oxidative polymerization with different oxidants, ammonium persulfate (APS), and iron(III) chloride, FeCl3. Characterization was performed by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, and gas sorption analysis. Photocatalytic activity of composite photocatalyst was evaluated by testing removal efficiency of C.I. Reactive Red 45 (RR45) azo dye in three consecutive photocatalytic cycles under different pH. Discoloration of RR45 was measured using UV/Vis spectroscopy. It was determined that oxidant type plays major role in structure of composite as sample synthesized with APS had higher fraction of polymer and largest pore volume. The same composite had much better photocatalytic efficiency than sample synthesized with FeCl3 oxidant. It was also determined that there is a very strong adsorption of dye molecules on the surface of photocatalyst that quickly causes saturation of photocatalyst and efficiency drop after first cycle. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46316.
机译：本研究的主要目的是开发支持的光催化剂，用于在太阳灯下延长效率的废水处理。对于该目的，通过溶胶 - 凝胶合成固定二氧化钛（TiO 2）在废粉灰（Fa）表面上的合成固定。在这种制备的复合材料上，通过用不同氧化剂，过硫酸铵（AP）和铁（III）氯化物，FECL3，通过原位化学氧化聚合接枝导电聚合物聚（3,4-亚乙二氧基噻吩）。表征由傅立叶进行变换红外光谱，扫描电子显微镜，X射线衍射，热重分析和气体吸附分析。通过试验C.I的去除效率来评价复合光催化剂的光催化活性。在不同pH下三个连续光催化循环中的反应性红色45（RR45）偶氮染料。使用UV / VI光谱测量RR45的变色。确定氧化剂型在复合材料结构中起主要作用，随着APS合成的样品具有更高的聚合物和最大孔体积的样品。相同的复合材料比用FECL3氧化剂合成的样品具有更好的光催化效率。还确定了在光催化剂表面上存在非常强烈的染料分子吸附，从循环后快速引起光催化剂饱和度和效率下降。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46316。

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