Preparation of Bismuth Tungstate/Preoxidized Acrylonitrile/Acrylic Acid Copolymer Composite Nanofiber Membrane and Its Photocatalytic Properties.

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Recent Patents on Nanotechnology Pub Date : 2023-01-01 DOI:10.2174/1872210516666220513094531

Yinchun Fang, Xinhua Liu, Hongzhang Li, Yanchun Liu

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引用次数: 0

Abstract

Background: In this patent article, a novel bismuth tungstate/preoxidized acrylonitrile/ acrylic acid (AN/AA) copolymer composite nanofiber membrane was prepared, which was used as the visible light catalyst.

Methods: AN/AA copolymer was synthesized, which was electrospun with bismuth nitrate and sodium tungstate to prepare the composite nanofiber. Then the composite nanofiber was preoxidized to prepare the bismuth tungstate/preoxidized AN/AA composite nanofiber membrane containing adsorption moiety and photocatalytic active moiety.

Results: The photocatalytic activity of bismuth tungstate/preoxidized AN/AA composite nanofiber membrane with different preoxidized temperature, heating rate, and holding time by catalytic degradation of methylene blue was investigated. The optimal preoxidized conditions were as follows: the preoxidized temperature was heated to 200 °C with the heating rate of 1°C/min and the holding time at this temperature was 12 h. The chemical structure and morphology of the composite nanofiber membrane were characterized by FTIR, XRD, and SEM.

Conclusion: The bismuth tungstate/preoxidized AN/AA composite nanofiber membrane obtained good photocatalytic properties and reusability under visible light. The degradation rate of methylene blue by this visible light catalyst could reach 90.24% for 4.5 h, and the degradation rate remained 81.53% for 4.5 h after 5 reuses.

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钨酸铋/预氧化丙烯腈/丙烯酸共聚物复合纳米纤维膜的制备及其光催化性能。

背景:本专利制备了一种新型钨酸铋/预氧化丙烯腈/丙烯酸(AN/AA)共聚物复合纳米纤维膜，并将其用作可见光催化剂。方法:合成AN/AA共聚物，用硝酸铋和钨酸钠静电纺丝制备复合纳米纤维。然后对复合纳米纤维进行预氧化，制备了钨酸铋/预氧化AN/AA复合纳米纤维膜，膜中含有吸附部分和光催化活性部分。结果:考察了钨酸铋/预氧化AN/AA复合纳米纤维膜在不同预氧化温度、加热速率和保温时间下催化降解亚甲基蓝的光催化活性。最佳预氧化条件为:预氧化温度为200℃，升温速率为1℃/min，保温时间为12 h。利用FTIR、XRD和SEM对复合纳米纤维膜的化学结构和形貌进行了表征。结论:钨酸铋/预氧化AN/AA复合纳米纤维膜在可见光下具有良好的光催化性能和可重复使用性。该可见光催化剂对亚甲基蓝的降解率在4.5 h内可达90.24%，重复使用5次后，4.5 h内亚甲基蓝的降解率仍为81.53%。

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来源期刊

Recent Patents on Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

4.70

自引率

10.00%

发文量

审稿时长

3 months

期刊介绍： Recent Patents on Nanotechnology publishes full-length/mini reviews and research articles that reflect or deal with studies in relation to a patent, application of reported patents in a study, discussion of comparison of results regarding application of a given patent, etc., and also guest edited thematic issues on recent patents in the field of nanotechnology. A selection of important and recent patents on nanotechnology is also included in the journal. The journal is essential reading for all researchers involved in nanotechnology.