Department of Chemistry, University of Ioannina, Ioannina, 45110, Greece.
Institute of Chemical Engineering Sciences, Foundation of Research and Technology Hellas, Rio Patras, 26504, Greece.
Chemistry. 2020 May 20;26(29):6643-6651. doi: 10.1002/chem.202000131. Epub 2020 Mar 13.
Nanoscale two-dimensional nanostructures have shown great potential as functional components in photocatalysis. Here, investigations on the synthesis of heterostructured hybrids, comprised of 0D CdS nanoparticles as semiconductor and 2D/2D graphene/MoS as co-catalyst, are reported. The approach involves a rapid microwave-assisted reaction in autoclave conditions, by adopting either a one-step or a two-step protocol. The chemical speciation of the nanocomposites was found to depend strongly on the compounding conditions of the precursor substances. The photocatalytic activity was assessed by monitoring the photodegradation rate of 4-nitrophenol in solution using simulated solar light irradiation. The photocatalytic activity of the hybrids may be attributed to a combination of beneficial characteristics, strongly related to the chemical speciation of the composite components. Moreover, intimate contacts of the latter result in efficient heterojunctions. Overall, the present study provides valuable insight into the development of functional heterostructured photocatalysts comprised of two-dimensional nanomaterials.
纳米二维纳米结构作为光催化中的功能组件显示出巨大的潜力。在此，报道了由 0D CdS 纳米粒子作为半导体和二维/二维石墨烯/MoS 作为共催化剂组成的异质结构杂化物的合成研究。该方法涉及在高压釜条件下通过快速微波辅助反应，采用一步或两步方案。纳米复合材料的化学形态强烈依赖于前体物质的复合条件。通过使用模拟太阳光照射监测溶液中 4-硝基苯酚的光降解速率来评估光催化活性。杂化物的光催化活性可归因于与复合材料成分的化学形态密切相关的有益特性的组合。此外，后者的紧密接触导致有效的异质结。总的来说，本研究为开发由二维纳米材料组成的功能性异质结构光催化剂提供了有价值的见解。
