Liu Shou-Heng, Wei Yu-Shao, Lu Jun-Sheng
Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
Chemosphere. 2016 Jul;154:118-123. doi: 10.1016/j.chemosphere.2016.03.107. Epub 2016 Apr 1.
The cuprous oxide-reduced graphene oxide (Cu2O/rGO-x) composites were prepared via a simple wet-chemical method by using CuSO4·5H2O and graphene oxide as precursors and ascorbic acid as a reducing agent, respectively. These Cu2O/rGO-x were employed as photocatalysts for degrading emerging contaminants and organic dye pollutants (i.e., sulfamethoxazole (SMX) and methylene blue (MB)) under visible light. A variety of different spectroscopic and analytical techniques, such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman scattering spectroscopy and UV-Visible spectroscopy were used to characterize the physical properties of photocatalysts. In the photodegrading experiments, it can be found that the Cu2O/rGO-80 photocatalyst has the superior visible-light response of ca. 50% removal efficiency of SMX within 120 min and 100% removal efficiency of MB within 40 min. These observations may be attributed the well-dispersed and visible-light-responsive Cu2O nanoparticles are supported on the surface of rGO sheets that can enhance absorption of visible light during photocatalysis.
通过一种简单的湿化学方法，分别以CuSO4·5H2O和氧化石墨烯为前驱体，以抗坏血酸为还原剂，制备了氧化亚铜-还原氧化石墨烯（Cu2O/rGO-x）复合材料。这些Cu2O/rGO-x被用作光催化剂，用于在可见光下降解新兴污染物和有机染料污染物（即磺胺甲恶唑（SMX）和亚甲基蓝（MB））。使用了各种不同的光谱和分析技术，如X射线衍射、透射电子显微镜、X射线光电子能谱、拉曼散射光谱和紫外-可见光谱来表征光催化剂的物理性质。在光降解实验中，可以发现Cu2O/rGO-80光催化剂具有优异的可见光响应，在120分钟内对SMX的去除效率约为50%，在40分钟内对MB的去除效率为100%。这些观察结果可能归因于分散良好且具有可见光响应的Cu2O纳米颗粒负载在rGO片材表面，这可以增强光催化过程中对可见光的吸收。
