Zhang Hui, Wang Xiaoyan, Li Na, Xia Jiaohui, Meng Qingmei, Ding Jincheng, Lu Jie
Department of Resources and Environmental Engineering, Shandong University of Technology 12 Zhangzhou Road Zibo 255049 China
College of Chemical Engineering, Shandong University of Technology Zibo 255049 China.
RSC Adv. 2018 Oct 5;8(60):34241-34251. doi: 10.1039/c8ra06681g. eCollection 2018 Oct 4.
In this study, graphene oxide (GO), titanium dioxide (TiO) and TiO/GO nanocomposites were synthesized as the catalysts for photoreduction of endocrine disrupting heavy metal ions in reverse osmosis concentrates (ROC). The morphology, structure and chemical composition of these catalysts were characterized by scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, Brunauer-Emmett-Teller analysis, Barrett-Joyner-Halenda, Fourier transform infrared spectroscopy and Raman spectroscopy. The photocatalytic experiments showed that TiO/GO nanocomposites exhibit a higher photoreduction performance than pure TiO and GO. Under the optimal conditions, the removal rates of Cd and Pb can reach 66.32 and 88.96%, respectively, confirming the effectiveness of photoreduction to reduce the endocrine disrupting heavy metal ions in ROC resulted from the combined adsorption-reduction with TiO/GO nanocomposites.
在本研究中，合成了氧化石墨烯（GO）、二氧化钛（TiO₂）和TiO₂/GO纳米复合材料，作为反渗透浓缩液（ROC）中光还原内分泌干扰重金属离子的催化剂。通过扫描电子显微镜、透射电子显微镜、粉末X射线衍射、布鲁诺尔-埃米特-泰勒分析、巴雷特-乔伊纳-哈伦达、傅里叶变换红外光谱和拉曼光谱对这些催化剂的形貌、结构和化学成分进行了表征。光催化实验表明，TiO₂/GO纳米复合材料比纯TiO₂和GO表现出更高的光还原性能。在最佳条件下，Cd和Pb的去除率分别可达66.32%和88.96%，证实了通过TiO₂/GO纳米复合材料的联合吸附-还原作用进行光还原以降低ROC中内分泌干扰重金属离子的有效性。
