A facile approach is presented to obtain visible-light-active TiO 2 /CdS nanocomposites with visible-light photocatalytic activity. Ordered nanospheres of TiO 2 (with anatase as the main crystalline phase) were synthesized using evaporation-induced self-assembly (EIS) with P123 block polymer without any hazardous additives. Then, a rapid microwave (MW) protocol was used to obtain visible-light-absorbing nanocomposites between TiO 2 and CdS in just 10 s. Based on Rietveld refinements of X-ray diffractrograms and elemental analysis it was found that nanoparticles of CdS are mainly decorated between the nanospheres of TiO 2 , which can simultaneously improve light absorption and suppress the unwanted photo-corrosion effects. The prepared nanocomposites were put to test for the removal of malachite green as a model pollutant from aqueous media under irradiation. The results revealed, that excessive loading results in unwanted surface covering and less than ideal activity, but for the sample with optimized loading, about 86 and 77% of the pollutant was degraded after 100 min of illumination at room temperature under the xenon short-arc and LED illumination, respectively.

中文翻译：

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CdS 纳米粒子在 TiO2 上的轻松装饰：LED 照明下的强光催化活性

提出了一种简便的方法来获得具有可见光光催化活性的可见光活性 TiO 2 /CdS 纳米复合材料。使用蒸发诱导自组装 (EIS) 与 P123 嵌段聚合物合成有序的 TiO 2 纳米球（以锐钛矿为主要结晶相），不含任何有害添加剂。然后，使用快速微波 (MW) 协议在短短 10 秒内获得 TiO 2 和 CdS 之间的可见光吸收纳米复合材料。基于 X 射线衍射图的 Rietveld 改进和元素分析，发现 CdS 纳米粒子主要装饰在 TiO 2 纳米球之间，这可以同时提高光吸收并抑制不需要的光腐蚀效应。将制备的纳米复合材料用于测试在辐照下从水性介质中去除作为模型污染物的孔雀石绿。结果表明，过量的负载导致不需要的表面覆盖和不理想的活性，但对于优化负载的样品，在氙气短弧下室温照射 100 分钟后，约 86% 和 77% 的污染物被降解和 LED 照明，分别。