Department of Physics, School of Arts and Science, AV Campus, Vinayaka Mission Research Foundation, Chennai, India.
Department of Physics, School of Sciences and Humanities Vel Tech Rangaarajan Dr. Sagunthala R&D Institute of Science and Technology, Tamil Nadu, Chennai, 600 117, India.
Appl Biochem Biotechnol. 2023 Jun;195(6):3966-3980. doi: 10.1007/s12010-022-03901-z. Epub 2022 Apr 8.
High efficient and environment friendly one-pot in situ microwave irradiation method was implemented towards the preparation of porous reduced graphene oxide/WO (rGOW) nanocomposites for the first time. Here, 3D porous WO nanoparticles were evenly decorated on 2D rGO sheets. The crystal phase purity and the functional group characterizations of the as-synthesized nanomaterials were examined by powder XRD and Raman spectral analyses. The morphological studies from the SEM, TEM, and BET measurements clearly revealed the highly porous nature of nano-sized WO and its distribution on the surface of rigid 2D graphene sheet. The UV along with visible light-driven degradation mechanism of malachite green (MG) dye in the rGOW nanocomposites was well illustrated with the schematic diagram and discussed in detail through the kinetics of the degradation process upon calculating the rate constant and half-life time. The rGO/WO photocatalyst delivered high MG degradation efficiency of 97% under UV irradiation.
首次采用高效环保的一锅原位微波辐射法制备了多孔还原氧化石墨烯/氧化钨（rGOW）纳米复合材料。在此，3D 多孔 WO 纳米颗粒均匀地修饰在 2D rGO 片上。通过粉末 X 射线衍射和拉曼光谱分析对所合成的纳米材料的晶体相纯度和官能团特性进行了检测。SEM、TEM 和 BET 测量的形态研究清楚地揭示了纳米级 WO 的高多孔性质及其在刚性 2D 石墨烯片表面的分布。通过示意图详细说明了孔雀石绿（MG）染料在 rGOW 纳米复合材料中在紫外光及可见光驱动下的降解机制，并通过计算降解过程的动力学，讨论了速率常数和半衰期。在 UV 照射下，rGO/WO 光催化剂对 MG 的降解效率高达 97%。
