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Synthesis and Photocatalytic Performance of PVA/TiO_2/Graphene-MWCNT Nanocomposites for Dye Removal

机译:PVA / TiO_2 /石墨烯-MWCNT纳米复合材料的合成及光催化去除染料性能

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摘要

TiO_2/graphene-MWCNT nanocomposite was prepared using solvothermal reaction for the effective distribution of TiO_2 nanoparticles on carbonaceous materials. TiO_2/graphene-MWCNT nanocomposite was immobilized in poly(vinyl alcohol) (PVA) matrix for a convenient recovery after wastewater purification. MWCNT was incorporated in a nanocomposite not only to prevent the restacking of graphene but also to increase the electron transfer from TiO_2. The detailed characterization of the nanocomposite was performed using SEM, EDX, XRD, XPS, and FTIR. The photocatalytic performance of PVA/TiO_2/graphene-MWCNT nanocomposite was investigated by UV spectroscopy on the basis of degradation of organic pollutants. PVA/TiO_2/graphene-MWCNT nanocomposite showed improved photocatalytic decomposition of more than 70% of residual dye left in case of using PVA/TiO_2/graphene nanocomposite due to the improved electron transfer and the higher adsorption of organic pollutants. PVA/TiO_2/graphene-MWCNT nanocomposite was suitable as a promising material for the recyclable photocatalytic wastewater purification system.
机译:利用溶剂热反应制备了TiO_2 /石墨烯-MWCNT纳米复合材料,以实现TiO_2纳米颗粒在含碳材料上的有效分布。 TiO_2 /石墨烯-MWCNT纳米复合材料固定在聚乙烯醇(PVA)基质中,以方便废水净化后的回收。 MWCNT被掺入纳米复合材料中,不仅可以防止石墨烯的重新堆积,而且可以增加电子从TiO_2的转移。纳米复合材料的详细表征使用SEM,EDX,XRD,XPS和FTIR进行。在有机污染物降解的基础上,通过紫外光谱法研究了PVA / TiO_2 /石墨烯-MWCNT纳米复合材料的光催化性能。 PVA / TiO_2 /石墨烯-MWCNT纳米复合材料由于改善了电子传递和有机污染物的吸附,在使用PVA / TiO_2 /石墨烯-纳米碳纳米复合材料的情况下,显示出超过70%残留染料的光催化分解得到改善。 PVA / TiO_2 /石墨烯-MWCNT纳米复合材料适合作为可回收光催化废水净化系统的有前途的材料。

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