一种无分离的三维网络ZnO/rGO-rGH水凝胶：用于环境应用的吸附增强光催化
A separation-free 3D network ZnO/rGO-rGH hydrogel: adsorption enriched photocatalysis for environmental applications.
作者信息
Liu Chong, Yue Mengting, Liu Li, Rui Yulan, Cui Wenquan
机构信息
College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology Tangshan 063210 P. R. China
出版信息
RSC Adv. 2018 Jun 19;8(40):22402-22410. doi: 10.1039/c8ra03873b.
This study describes the encapsulation of ZnO by reduced graphene oxide to form a composite (ZnO/rGO) that can be incorporated into graphene to form hydrogels (ZnO/rGO-rGH) with three-dimensional (3D) network structures. The unique surface adsorption characteristics of graphene make ZnO/rGO-rGH materials have the ability of fast adsorption and desorption. Meanwhile, the combination of graphene and ZnO nanoparticles can promote the separation efficiency of electrons and holes and improve the photocatalytic activity. The sample showed the highest adsorption-photocatalysis synergistic activity and removed 100% of the BPA (10 mg L) within 20 min under UV irradiation. The purification efficiency of ZnO/rGO-rGH can reach more than 90% after 5 rounds of repeated use. We also measured the performance of ZnO/rGO-rGH in removing BPA under flow conditions, and the results showed that this approach with ZnO/rGO-rGH removed 100% of the BPA in 16 h.
本研究描述了用还原氧化石墨烯包裹氧化锌以形成一种复合材料（ZnO/rGO），该复合材料可与石墨烯结合形成具有三维（3D）网络结构的水凝胶（ZnO/rGO-rGH）。石墨烯独特的表面吸附特性使ZnO/rGO-rGH材料具有快速吸附和解吸的能力。同时，石墨烯与氧化锌纳米颗粒的结合可促进电子和空穴的分离效率并提高光催化活性。该样品表现出最高的吸附-光催化协同活性，在紫外线照射下20分钟内可去除100%的双酚A（10毫克/升）。经过5轮重复使用后，ZnO/rGO-rGH的净化效率可达到90%以上。我们还测量了ZnO/rGO-rGH在流动条件下去除双酚A的性能，结果表明采用ZnO/rGO-rGH的这种方法在16小时内可去除100%的双酚A。
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