Preparation and photocatalytic performance of N-doped graphene  oxide/TiO2/PAN composite nanofiber membranes

doi:10.19398/j.att.202106033

Abstract

Abstract: To prepare a nano-titanium dioxide (TiO₂) photocatalytic material with high photocatalytic performance, graphene oxide modified with urea was used to obtain nitrogen-doped graphene oxide (NG), and NG modified TiO₂was used to obtain NG-TiO₂. ThenNG-TiO₂was loaded onto polyacrylonitrile (PAN) nanofiber film by adopting electrostatic spinning techniques, obtainingthe porous NG-TiO₂/PAN composite nanofiber membranes with photocatalytic activity. In addition, the scanning electron microscope (SEM), visible-ultraviolet diffuse reflectance spectrum(UV-vis DRS), X-ray diffraction (XRD), Raman spectroscopic analysis, thermogravimetric analysis (TG), specific surface area analysis (BET) and other means were adopted to characterize the composite nanofiber membranes. The effects of different doping ratios of NG-TiO₂ on the adsorption and photocatalytic properties of methylene blue solution were studied. The results show that the optimum adsorption rate of the material on the methylene blue solution at 120 min is 96.8%, and the best photovoltaic rate of methylene blue solution is 94% at 120 min under xenon lamp (without filter).

Key words: photocatalytic, titanium dioxide, graphene oxide, PAN, composite nanofiber membranes, electrospinning

摘要： 为制备具有较高光催化性能的材料,使用尿素改性氧化石墨烯得到氮掺杂氧化石墨烯(NG),然后用NG改性TiO₂得到NG-TiO₂,结合静电纺丝技术使其负载在聚丙烯腈(PAN)纳米纤维膜上,得到具有光催化活性的多孔NG-TiO₂/PAN 复合纳米纤维膜。对该材料采用扫描电镜(SEM)、可见紫外漫反射光谱(UV-vis DRS)、X射线衍射(XRD)、拉曼光谱分析、热重分析(TG)、比表面积分析(BET)等手段进行表征。研究复合纳米纤维膜中不同NG-TiO₂的掺杂比例对亚甲基蓝溶液的吸附及光催化性能的影响。结果表明:该材料对亚甲基蓝溶液在120 min时的最佳吸附率为96.8%,在氙灯照射下(不使用滤光片)120min时对亚甲基蓝的最佳光催解率达到了94%。

关键词: 光催化, 二氧化钛, 氧化石墨烯, 聚丙烯腈, 复合纳米纤维膜, 静电纺丝

CLC Number:

TQ342.94

JIA Ziqi, WANG Chen, ZHAO Tiantian, LIU Yang. Preparation and photocatalytic performance of N-doped graphene oxide/TiO₂/PAN composite nanofiber membranes[J]. Advanced Textile Technology, 2022, 30(3): 97-107.

贾子奇, 王琛, 赵甜甜, 刘扬. 氮掺杂氧化石墨烯-TiO₂/ PAN复合纳米纤维膜的制备及其光催化性能[J]. 现代纺织技术, 2022, 30(3): 97-107.

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Preparation and photocatalytic performance of N-doped graphene oxide/TiO₂/PAN composite nanofiber membranes

氮掺杂氧化石墨烯-TiO₂/ PAN复合纳米纤维膜的制备及其光催化性能

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