Visible-Light-Activated Black Organotitanias: How Synthetic Conditions Influence Their Structure and Photocatalytic Activity.,ChemPlusChem

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Visible-Light-Activated Black Organotitanias: How Synthetic Conditions Influence Their Structure and Photocatalytic Activity.
ChemPlusChem ( IF 3.0 ) Pub Date : 2018-04-27 , DOI: 10.1002/cplu.201800054
Jesús Jiménez-López ₁ , Noemi Linares ₁ , Elena Serrano ₁ , Javier García-Martínez ₁

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A series of low-temperature, visible-light-activated black organotitanias were synthesised through a sol-gel strategy that allowed the in situ incorporation of p-phenylenediamine (PPD) into the framework of anatase nanoparticles. The effect of the synthetic conditions on the crystalline structure and photocatalytic activity of these materials was assessed by several characterisation techniques, which revealed a small crystalline domain size (4.6-5.5 nm), effective incorporation of PPD inside the nanoparticles, and a significant reduction in the band gap of these materials (from 3.2 to 2.7-2.9 eV). A systematic study of the synthetic parameters also allowed a significant reduction of the solvent used for the preparation of these black organotitanias (20-fold), as well as the crystallisation time, without compromising the structural properties and photocatalytic activity of these materials. The organotitanias with the highest PPD content and high crystallinity result in the best performing materials in the photocatalytic degradation of rhodamine 6G under both UV- and visible-light irradiation.

中文翻译：

可见光激活的黑色有机锡：合成条件如何影响其结构和光催化活性。

通过溶胶-凝胶策略合成了一系列低温可见光活化的黑色有机二氧化钛，该策略允许将对苯二胺（PPD）原位掺入锐钛矿纳米颗粒的骨架中。合成条件对这些材料的晶体结构和光催化活性的影响通过几种表征技术进行了评估，这些技术显示出较小的晶畴尺寸（4.6-5.5 nm），PPD有效掺入纳米颗粒内以及显着降低了PPD的含量。这些材料的带隙（从3.2到2.7-2.9 eV）。对合成参数的系统研究也使用于制备这些黑色有机二氧化钛的溶剂大大减少（20倍），并缩短了结晶时间，而不会损害这些材料的结构性质和光催化活性。PPD含量最高和结晶度高的有机二氧化钛在罗丹明6G在紫外光和可见光照射下的光催化降解方面，是性能最好的材料。

更新日期：2018-04-27

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