Abstract ZnO decorated rGO nanocomposites (ZnO∙x% rGO NC (x = 1, 5, 10, 15, 20 and 25)) were fabricated using hydrothermal method. Elemental mapping of Zn ions on the surface of ZnO∙rGO were distributed over the surface. SEM images showed that ZnO nanoparticles have agglomerated into micron size clusters. EDS measurements were used to determine the exact chemical content of NC’s. FTIR spectra indicated that GO had been reduced to rGO by hydrothermal fabrication process used. The shifts of G band in Raman spectra indicate the presence of interfacial Zn O C bonds. UV–vis absorption studies were used to monitor the amount of Cr6+ ions in solutions after their exposure to light. Photocatalytic reduction of toxic Cr6+ was observed by time change in the absorption of light at two wave lengths, 273 nm and 373 nm. The enhancement of photo reduction rate increased, reaching a maximum at x = 10 % and then decreased.

中文翻译：

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还原氧化石墨烯 (rGO) 纳米复合材料上装饰的 ZnO 光催化还原 Cr6+

摘要 ZnO 修饰的 rGO 纳米复合材料（ZnO∙x% rGO NC (x = 1, 5, 10, 15, 20 和 25)）采用水热法制备。ZnO∙rGO 表面的 Zn 离子元素分布分布在整个表面。SEM 图像显示 ZnO 纳米颗粒已经团聚成微米级的团簇。EDS 测量用于确定 NC 的确切化学含量。FTIR 光谱表明 GO 已通过使用的水热制造工艺还原为 rGO。拉曼光谱中 G 带的移动表明界面 Zn OC 键的存在。紫外-可见吸收研究用于监测溶液暴露于光后的 Cr6+ 离子量。通过在两个波长 273 nm 和 373 nm 处光吸收的时间变化观察到有毒 Cr6+ 的光催化还原。