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离子型多孔芳香骨架作为自降解模板用于合成具有增强光催化性能的磁性γ-FeO/WO·0.5HO杂化纳米结构

Ionic Porous Aromatic Framework as a Self-Degraded Template for the Synthesis of a Magnetic γ-FeO/WO·0.5HO Hybrid Nanostructure with Enhanced Photocatalytic Property.

作者信息

Xu Man, Wang Kai, Cao Xuan

机构信息

Instrumental Analysis Center, Shenyang University of Chemical Technology, Shenyang 110142, China.

College of Science, Shenyang University of Chemical Technology, Shenyang 110142, China.

出版信息

Molecules. 2021 Nov 13;26(22):6857. doi: 10.3390/molecules26226857.

DOI:10.3390/molecules26226857
PMID:34833949
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8617793/
Abstract

An ionic porous aromatic framework is developed as a self-degraded template to synthesize the magnetic heterostructure of γ-FeO/WO·0.5HO. The FeO polyhedron was obtained with the two-phase method first and then reacted with sodium tungstate to form the γ-FeO/WO·0.5HO hybrid nanostructure. Under the induction effect of the ionic porous network, the FeO phase transformed to the γ-FeO state and complexed with WO·0.5HO to form the n-n heterostructure with the n-type WO·0.5HO on the surface of n-type γ-FeO. Based on a UV-Visible analysis, the magnetic photocatalyst was shown to have a suitable band gap for the catalytic degradation of organic pollutants. Under irradiation, the resulting γ-FeO/WO·0.5HO sample exhibited a removal efficiency of 95% for RhB in 100 min. The charge transfer mechanism was also studied. After the degradation process, the dispersed powder can be easily separated from the suspension by applying an external magnetic field. The catalytic activity displayed no significant decrease after five recycles. The results present new insights for preparing a hybrid nanostructure photocatalyst and its potential application in harmful pollutant degradation.

摘要

一种离子型多孔芳香框架被开发用作自降解模板,以合成γ-FeO/WO·0.5H₂O的磁性异质结构。首先通过两相法获得Fe₃O₄多面体,然后使其与钨酸钠反应形成γ-FeO/WO·0.5H₂O混合纳米结构。在离子多孔网络的诱导作用下,Fe₃O₄相转变为γ-Fe₂O₃状态,并与WO·0.5H₂O络合,在n型γ-Fe₂O₃表面形成具有n型WO·0.5H₂O的n-n异质结构。基于紫外-可见分析,该磁性光催化剂显示出对有机污染物催化降解具有合适的带隙。在光照下,所得的γ-Fe₂O₃/WO·0.5H₂O样品在100分钟内对罗丹明B的去除效率达到95%。还研究了电荷转移机制。降解过程结束后,通过施加外部磁场可轻松将分散的粉末从悬浮液中分离出来。经过五次循环后,催化活性没有显著下降。这些结果为制备混合纳米结构光催化剂及其在有害污染物降解中的潜在应用提供了新的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/f1968ef6a124/molecules-26-06857-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/6815f73ca469/molecules-26-06857-g001a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/e162b5e22a1d/molecules-26-06857-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/fb1ede21d1cc/molecules-26-06857-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/fc9df358932c/molecules-26-06857-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/0bf46217f303/molecules-26-06857-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/54502ed4fcdf/molecules-26-06857-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/4dfc3130f0d5/molecules-26-06857-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/f1968ef6a124/molecules-26-06857-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/6815f73ca469/molecules-26-06857-g001a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/e162b5e22a1d/molecules-26-06857-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/fb1ede21d1cc/molecules-26-06857-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/fc9df358932c/molecules-26-06857-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/0bf46217f303/molecules-26-06857-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/54502ed4fcdf/molecules-26-06857-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/4dfc3130f0d5/molecules-26-06857-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6ff1/8617793/f1968ef6a124/molecules-26-06857-g008.jpg

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