Integrated adsorption and photocatalytic removal of methylene blue dye from aqueous solution by hierarchical Nb2O5@PAN/PVDF/ANO composite nanofibers

IF 9.9 2区材料科学 Q1 Engineering Nano Materials Science Pub Date : 2024-02-01 DOI:10.1016/j.nanoms.2023.10.006

Aditya Rianjanu , Kurniawan Deny Pratama Marpaung , Elisabeth Kartini Arum Melati , Rizky Aflaha , Yudha Gusti Wibowo , I Putu Mahendra , Nursidik Yulianto , Januar Widakdo , Kuwat Triyana , Hutomo Suryo Wasisto , Tarmizi Taher

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Abstract

This work presents the development of hierarchical niobium pentoxide (Nb₂O₅)-based composite nanofiber membranes for integrated adsorption and photocatalytic degradation of methylene blue (MB) pollutants from aqueous solutions. The Nb₂O₅ nanorods were vertically grown using a hydrothermal process on a base electrospun nanofibrous membrane made of polyacrylonitrile/polyvinylidene fluoride/ammonium niobate (V) oxalate hydrate (Nb₂O₅@PAN/PVDF/ANO). They were characterized using field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) analysis, and Fourier transform infrared (FTIR) spectroscopy. These composite nanofibers possessed a narrow optical bandgap energy of 3.31 eV and demonstrated an MB degradation efficiency of 96 % after 480 min contact time. The pseudo-first-order kinetic study was also conducted, in which Nb₂O₅@PAN/PVDF/ANO nanofibers have kinetic constant values of 1.29 × 10⁻² min⁻¹ and 0.30 × 10⁻² min⁻¹ for adsorption and photocatalytic degradation of MB aqueous solutions, respectively. These values are 17.7 and 7.8 times greater than those of PAN/PVDF/ANO nanofibers without Nb₂O₅ nanostructures. Besides their outstanding photocatalytic performance, the developed membrane materials exhibit advantageous characteristics in recycling, which subsequently widen their practical use in environmental remediation applications.

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分层 Nb2O5@PAN/PVDF/ANO 复合纳米纤维对水溶液中亚甲基蓝染料的综合吸附和光催化去除

本研究开发了基于五氧化二铌（Nb2O5）的分层复合纳米纤维膜，用于综合吸附和光催化降解水溶液中的亚甲基蓝（MB）污染物。在聚丙烯腈/聚偏二氟乙烯/草酸铌酸铵 (V) 水合物（Nb2O5@PAN/PVDF/ANO）制成的电纺纳米纤维膜基底上，采用水热法垂直生长了 Nb2O5 纳米棒。使用场发射扫描电子显微镜（FE-SEM）、X 射线衍射（XRD）分析和傅立叶变换红外光谱（FTIR）对它们进行了表征。这些复合纳米纤维具有 3.31 eV 的窄光带隙能，在接触 480 分钟后，甲基溴降解效率达到 96%。还进行了伪一阶动力学研究，Nb2O5@PAN/PVDF/ANO 纳米纤维对甲基溴水溶液的吸附和光催化降解的动力学常数分别为 1.29 × 10-2 min-1 和 0.30 × 10-2 min-1。这些数值分别是不含 Nb2O5 纳米结构的 PAN/PVDF/ANO 纳米纤维的 17.7 倍和 7.8 倍。除了出色的光催化性能外，所开发的膜材料还具有可回收利用的优势，从而拓宽了其在环境修复应用中的实际用途。

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来源期刊

Nano Materials Science Engineering-Mechanics of Materials

CiteScore

20.90

自引率

3.00%

发文量

294

审稿时长

9 weeks

期刊介绍： Nano Materials Science (NMS) is an international and interdisciplinary, open access, scholarly journal. NMS publishes peer-reviewed original articles and reviews on nanoscale material science and nanometer devices, with topics encompassing preparation and processing; high-throughput characterization; material performance evaluation and application of material characteristics such as the microstructure and properties of one-dimensional, two-dimensional, and three-dimensional nanostructured and nanofunctional materials; design, preparation, and processing techniques; and performance evaluation technology and nanometer device applications.