A novel photocatalytic membrane decorated with RGO-Ag-TiO2 for dye degradation and oil-water emulsion separation
A novel photocatalytic membrane decorated with RGO-Ag-TiO2 for dye degradation and oil-water emulsion separation
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DOI：
10.1002/jctb.5426
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发表时间：
2018-03-01
影响因子：
3.4
通讯作者：
Zeng, Guangyong
中科院分区：
文献类型：
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作者：
Chen, Qi;Yu, Zongxue;Zeng, Guangyong
背景：如果膜分离技术的抗污染能力和可回收性得到提高，那么膜分离技术是一种很有前途的处理染料和含油废水的方法。近年来，光催化材料的发展为膜技术的研究提供了新的方法。结果：在本研究中，通过简单的真空过滤，制备了一种新型的RGO-Ag-TiO2纳米材料修饰的光催化膜，用于染料的降解和油水的分离。首先，为了提高光催化效率，制备了二氧化钛纳米线，通过水热反应制备了氧化还原石墨烯(RGO)-银-二氧化钛，然后用聚乙二醇和戊二醛直接将其修饰在醋酸纤维素(CA)膜上。结论：所制备的光催化膜在可见光照射下可以在短时间内同时降解染料和分离油水乳状液。该膜具有极高的水通量(191L m~(-2)h~(-1))和对染料-油水乳状液的截留率(几乎100%)。更重要的是，光催化膜具有良好的抗污染能力和可回收性，在可见光照射下经过6个循环的实验后，保持了相对稳定的染料-油-水渗透通量(约27.5 L m(-2)h(-1))和较高的截留率(高达99%)。总体而言，光催化膜为废水处理开辟了新的途径。(三)2017年化学工业学会
BACKGROUND: Membrane separation is a promising process for treatment of dye and oily wastewater if the antifouling capacity and recyclability can be improved. In recent years, the development of photocatalytic materials has provided new methods for research into membrane technology.RESULTS: In this study, a novel photocatalytic membrane decorated with RGO-Ag-TiO2 nanomaterial was fabricated by simple vacuum filtration for degradation of dye and separation of oil-water. First, TiO2 nanowires were prepared for more effective photocatalysis, reduced graphene oxide (RGO)-Ag-TiO2 was fabricated by a facile hydrothermal reaction, then it was directly decorated on cellulose acetate (CA) membrane using polyethylene glycol and glutaraldehyde.CONCLUSION: The as-prepared photocatalytic membrane can simultaneously degrade dye and separate oil-water emulsions under visible-light irradiation in a short time. The membrane has extremely high water flux (191 L m(-2)h(-1)) and rejection rates (almost 100%) of dye-oil-water emulsion. More importantly, the photocatalytic membrane shows excellent antifouling capacity and recyclability, and retains relatively stable dye-oil-water permeation flux (about 27.5 L m(-2)h(-1)) and high rejection rates (up to 99%) after six cycles of experiments under visible-light irradiation. Overall, the photocatalytic membrane opens up new avenues for the treatment of wastewater. (c) 2017 Society of Chemical Industry