AlSalhi Mohamad S, Devanesan Sandhanasamy, Asemi Nassar N, Aldawsari Majdoleen
Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia.
Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia.
Environ Res. 2023 Apr 1;222:115370. doi: 10.1016/j.envres.2023.115370. Epub 2023 Jan 28.
Water contamination by reactive dyes is a serious concern for human health and the environment. In this study, we prepared high efficient SnO/CuO/rGO nanocomposites for reactive dye degradation. For structural analysis of SnO/CuO/rGO nanocomposites, XRD, UV-Vis DRS, SEM, TEM-EDAX, and XPS analysis were used to characterize the physicochemical properties of the material. The characterization results confirmed great crystallinity, purity, and optical characteristics features. For both Rhodamine B (RhB) and Reactive Red 120 (RR120) degradation processes, SnO/CuO/rGO nanocomposites were tested for their photocatalytic degradation performance. The SnO/CuO/rGO nanocomposites have expressed the degradation rate exposed to 99.6% of both RhB and RR120 dyes. The main reason behind the photocatalytic degradation was due to the formation of OH radical's generation by the composite materials. Moreover, the antibacterial properties of synthesized SnO/CuO/rGO nanocomposites were studied against E. coli, S. aureus, B. subtilis and P. aeroginosa and exhibited good antibacterial activity against the tested bacterial strains. Thus, the synthesized SnO/CuO/rGO nanocomposites are a promising photocatalyst and antibacterial agent. Furthermore, mechanisms behind the antibacterial effects will be ruled out in near future.
活性染料造成的水污染是人类健康和环境面临的一个严重问题。在本研究中，我们制备了用于降解活性染料的高效SnO/CuO/rGO纳米复合材料。为了对SnO/CuO/rGO纳米复合材料进行结构分析，采用XRD、紫外可见漫反射光谱（UV-Vis DRS）、扫描电子显微镜（SEM）、透射电子显微镜-能谱分析（TEM-EDAX）和X射线光电子能谱（XPS）分析来表征该材料的物理化学性质。表征结果证实了其具有良好的结晶度、纯度和光学特性。对于罗丹明B（RhB）和活性红120（RR120）的降解过程，测试了SnO/CuO/rGO纳米复合材料的光催化降解性能。SnO/CuO/rGO纳米复合材料对RhB和RR120染料的降解率均达到99.6%。光催化降解背后的主要原因是复合材料产生了羟基自由基。此外，还研究了合成的SnO/CuO/rGO纳米复合材料对大肠杆菌、金黄色葡萄球菌、枯草芽孢杆菌和气单胞菌的抗菌性能，结果表明其对受试菌株具有良好的抗菌活性。因此，合成的SnO/CuO/rGO纳米复合材料是一种很有前景的光催化剂和抗菌剂。此外，抗菌作用背后的机制将在不久的将来得到阐明。
