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Influence of precursor pH on the structure and photo-Fenton performance of Fe/hydrochar

机译：前驱体pH值对Fe /烃的结构和光芬顿性能的影响

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Fe/hydrochar was one-pot synthesized by a hydrothermal method under different pH conditions. The structure, composition and chemical state of the obtained samples were analyzed by different characterization methods. It was found that the precursor pH affected the morphology, surface area, surface Fe content and organic groups of the products. The catalytic performance of the samples for the photo-Fenton decolorization of Orange II with visible light irradiation and the role of dissolved Fe in this process were investigated. The result indicated that the Fe/hydrochar prepared at pH 2 exhibited the highest catalytic activity because of its strong visible light adsorption, high surface Fe content, and rich oxygen-containing groups. The light irradiation accelerated the leaching of Fe and regeneration of Fe2+, and the contribution of homogeneous reactions increased dramatically with reaction time, thus promoting the formation of ˙OH in solution. A possible mechanism for the Fe3+/Fe2+ cycle at the catalyst/water interface was proposed.
机译：Fe /烃是在不同的pH条件下通过水热法一锅法合成的。通过不同的表征方法对所得样品的结构，组成和化学状态进行了分析。发现前体pH影响产品的形态，表面积，表面Fe含量和有机基团。研究了样品在可见光照射下对橙II的光芬顿脱色的催化性能以及溶解的铁在该过程中的作用。结果表明，在pH 2下制备的Fe /烃具有最高的催化活性，因为它具有较强的可见光吸附能力，较高的表面Fe含量和丰富的含氧基团。光照射加速了Fe的浸出和Fe 2 + 的再生，均相反应的贡献随着反应时间的增加而显着增加，从而促进了溶液中˙OH的形成。 。提出了在催化剂/水界面处Fe 3 + / Fe 2 + 循环的可能机理。

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