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The role played by different TiO2 features on the photocatalytic degradation of paracetamol

机译：不同的TiO2功能对对乙酰氨基酚的光催化降解作用

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摘要

Photocatalytic reactions promoted by TiO2 can be affected by a large number of oxide features (e.g. surfaceare a, morphology and phase composition). In this context, the role played by the surface characteristics( surface acidity, wettability, etc.) has been often disregarded. In this work, pristine and Ta-doped TiO2 nanomaterials with different phase composition (pure anatase and anatase/brookite mixture) were synthesized by sol-gel and characterized under the structural and morphological point of view. A careful characterization of the acid properties of the materials has been performed by liquid-solid acid-base titration by means of 2-phenylethylamine (PEA) adsorption to determine the acid site density and average acid strength. Photocatalytic tests were performed in the degradation of paracetamol (acetaminophen) under UV irradiation and results were discussed in the light of the detailed scenarios describing the different oxides. The surface acidity of the samples, was recognized as one of the key parameters controlling the photocatalytic activity. A possible molecule degradation route is proposed on the ground of GC-MS and ESI-MS analyses. (C) 2017 Elsevier B.V. All rights reserved.
机译：TiO2促进的光催化反应可能会受到大量氧化物特征（例如表面积，形态和相组成）的影响。在这种情况下，常常忽略了由表面特性（表面酸度，润湿性等）所起的作用。在这项工作中，通过溶胶-凝胶法合成了具有不同相组成（纯锐钛矿和锐钛矿/板钛矿混合物）的原始和Ta掺杂的TiO2纳米材料，并从结构和形态的角度对其进行了表征。通过2-苯乙胺（PEA）吸附进行液固酸碱滴定，以确定酸位点密度和平均酸强度，对材料的酸性质进行了仔细的表征。在紫外线照射下对对乙酰氨基酚（对乙酰氨基酚）的降解进行了光催化测试，并根据描述不同氧化物的详细方案讨论了结果。样品的表面酸度被认为是控制光催化活性的关键参数之一。根据GC-MS和ESI-MS分析提出了一种可能的分子降解途径。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第2期|198-205|共8页
  • 作者

    Rimoldi Luca; Meroni Daniela; Falletta Ermelinda; Ferretti Anna Maria; Gervasini Antonella; Cappelletti Giuseppe; Ardizzone Silvia;

  • 作者单位

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy|Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Via Giusti 9, I-50121 Florence, Italy;

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy|Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Via Giusti 9, I-50121 Florence, Italy;

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy;

    ISTM CNR Lab Nanotechnol, Via Fantoli 16-15, Milan, Italy;

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy;

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy|Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Via Giusti 9, I-50121 Florence, Italy;

    Univ Milan, Dipartimento Chim, Via Golgi 19, I-20133 Milan, Italy|Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Via Giusti 9, I-50121 Florence, Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Titanium dioxide photocatalysis; Ta-doped TiO2; Surface acidity; Phenylethylamine; Acetaminophen degradation; HR TEM;

    机译：二氧化钛光催化;掺杂钽的TiO2;表面酸度;苯乙胺;对乙酰氨基酚降解;HR TEM;

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