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首页> 外文期刊>Scientific reports. >Synthesis and degradation kinetics of TiO2/GO composites with highly efficient activity for adsorption and photocatalytic degradation of MB
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Synthesis and degradation kinetics of TiO2/GO composites with highly efficient activity for adsorption and photocatalytic degradation of MB

机译：TiO2 / GO复合材料的合成和降解动力学，具有高效活性，用于MB的吸附和光催化降解

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摘要

Poriferous TiOsub2/sub/GO (denoted as TGO-x%) photocatalysts with ultrathin grapheme oxide (GO) layer were prepared by a hydrothermal method, the adsorption and photocatalytic degradation and its kinetics about Methylene blue(MB) were studied systematically. All the TGO-x% showed improved adsorption and photodegradation performance. TGO-25% had excellent adsorptivity while TGO-20% exhibit the highest visible light photocatalytic degradation activity. The adsorption capacity for TGO-25% was 20.25?mg/gsubcatalyst/sub along with the ksub1/sub was about 0.03393?min·gsubcatalyst/sub/mg, this enhancement was mainly owing to the strong adsorption capacity of GO and the stacking structure of sheets and nanoparticles. GO sheets prevented the agglomeration of TiOsub2/sub particles and TiOsub2/sub nanoparticles also prevented the agglomeration of GO sheets, which could provides greater surface area. Besides, the remarkably superior photodegradation activity of TiOsub2/sub/GO composites is mainly attribute to the strong absorption of visible light and the effective charge separation revealed by the photoluminescence, the total removal rate of MB is 97.5% after 35?min adsorption and 140?min degradation, which is 3.5 times higher than that of TiOsub2/sub.
机译：通过水热法，吸附和光催化降解及其动力学，制备具有超薄石墨氧化物（GO）层的光催化剂，对甲基蓝（MB）的吸附和光催化降解制备具有超薄石墨氧化物（GO）层的光催化剂系统地研究了。所有TGO-X％都显示出改善的吸附和光降解性能。 TGO-25％具有优异的吸附性，而TGA-20％表现出最高可见光光催化降解活性。 TGO-25％的吸附能力为20.25〜Mg / g 催化剂以及K 1 为约0.03393Ω·min·g 催化剂 / Mg，这种增强主要是由于Go的强烈吸附能力和纸张和纳米颗粒的堆叠结构。 Go Sheets防止TiO 2 颗粒和TiO 2纳米粒子的凝聚也防止了去板的聚集，其可以提供更大的表面积。此外，TiO 2 /去复合材料的显着优异的光降解活性主要属于可见光的强吸收，并且光致发光显示的有效电荷分离，Mb的总除去率为97.5％ 35？最小吸附和140？最小劣化，比TiO 2 高3.5倍。

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