静电溶液喷射Fe2O3/Al2O3超细纤维负载型光催化剂的制备及催化性能研究

doi:10.11896/j.issn.1005-023X.2018.02.010

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Abstract

Ultra-fine fibrous Al₂O₃ supported Fe₂O₃ photocatalyst was prepared by an electro-blown spinning (EBS) method combined with impregnation-calcination process, and characterized by techniques such as SEM,EDS and XRD. Photocatalytic degradation of Reactive Red 195 (RR 195) in aqueous solution was used as a probe reaction to evaluate the product’s photocatalytic activity. The results showed that flexible and ultra-fine fibrous alumina mat, which is appropriate for photocatalyst supporter and has an average diameter of 3.78 μm, can be obtained via electro-blown spinning method. The catalytic experimental results suggested that the optimum photocatalytic performance of the photocatalyst was achieved when the sintering temperature was 500 ℃ and the iron loaded content was 195.5 mg/g. The dye decoloration rate reached 95% within 120 min for the first run with H₂O₂ and UV light, and it can be maintained 70% after three rounds. Moreover,this photocatalyst still maintained good fabric morphology after reaction and was easier to be separated from dye solution, which could avoid the secondary pollution effectively.

Key words： electro-blown spinning alumina ultra-fine fiber ferric oxide supported photocatalyst

Published: 25 January 2018

CLC number:

TF123

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	Articles by authors
	Lei LI
	Bowen CHENG
	Weimin KANG
	Xiaoguang MA
	Xupin ZHUANG

Cite this article:

Lei LI,Bowen CHENG,Weimin KANG, et al. Fe₂O₃ Photocatalyst Supported on Ultra-fine Fibrous Al₂O₃ Prepared via Electro- blown Spinning (EBS) with an Application to Organic Dye Degradation[J]. Materials Reports, 2018, 32(2): 207-212.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.02.010 OR http://www.mater-rep.com/EN/Y2018/V32/I2/207

(a)The schematic of the EBS apparatus; (b)schematic diagram for the preparation of Fe₂O₃/Al₂O₃ultra-fine fiber supported photocatalyst

(a) SEM image of EBS alumina fiber mat, and inset was SEM image of solution blowing alumina fiber; (b) diameter distribution of EBS alumina fiber; (c) SEM image of Fe₂O₃/Al₂O₃ photocatalyst; (d) EDS image of Fe₂O₃/Al₂O₃ photocatalyst

(a)N₂ isotherm adsorption-desorption curvers of EBS alumina fiber (inset was BJH pore size distribution) and (b)pore size distribution and average pore size of EBS alumina mat

XRD spectra of (a) EBS alumina fiber and (b) Fe₂O₃/Al₂O₃ photocatalyst obtained under different sintering temperature

Photocatalytic curves of photocatalyst obtained under different sintering temperature

(a) XRD spectra and (b) photocatalytic curves of photocatalyst obtained with different iron loaded contents

Recycled curves of Fe₂O₃/Al₂O₃ ultra-fine fiber supported photocatalyst

The catalytic action of Fe₂O₃/Al₂O₃ ultra-fine fiber supported photocatalyst: (a) 0.6 g photocatalyst, dark; (b) 0.6 g photocatalyst, visible light; (c) 0.6 g photocatalyst, UV-light; (d) 0.6 g photocatalyst, 2 mmol/L H₂O₂, UV-light

(a)Digital images of EBS alumina fiber mat; (b)the folded EBS alumina fiber mat; (c)digital images of Fe₂O₃/Al₂O₃ photocatalyst; (d)digital images of used Fe₂O₃/Al₂O₃ photocatalyst

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