α-Fe2O3/煤矸石复合光催化剂的制备及其降解五氯酚性能的研究

Abstract

Abstract:

Using ferric nitrate,coal gangue and sodium hydroxide as the raw materials,α-Fe₂O₃/coal gangue composite photoc-atalysts with different mass ratios of α-Fe₂O₃ were successfully prepared by boiling reflux method.Field emission scanning electron microscopy（FESEM）,X-ray powder diffraction（XRD） and UV-Vis diffuse reflectance spectra（UV-Vis DRS） were used to characterize the products.The photocatalytic activity of as-prepared samples was investigated for degradation of pentachlorophenol under simulated sunlight.The results indicated that loading spherical α-Fe₂O₃ composite on the surface of modified coal gangue could effectively improve its catalytic activity,and there was a close relationship between the photocatalytic performance of α-Fe₂O₃/coal gangue composites and the content of α-Fe₂O₃.When the mass ratio of α-Fe₂O₃ to coal gangue was 30∶100,α-Fe₂O₃/coal gangue composite photocatalyst showed the highest performance and pentachlorophenol was almost completely degraded within 180 min.In addition,this kind of catalyst could be used repeatedly.

Key words: α-Fe₂O₃, coal gangue, photocatalytic performance, pentachlorophenol

CLC Number:

TQ138.11

Xie Juan,Xia Runnan,Du Hongxia,Xu Yongquan,Zhao Shuchun,Xu Hong,Kang Wentong. Preparation of α-Fe₂O₃/coal gangue composite photocatalyst and its application in pentachlorophenol degradation[J]. Inorganic Chemicals Industry, 2019, 51(5): 74-77.

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样品编号	煤矸石用量/g	m（α-Fe₂O₃）:m（煤矸石）	样品编号	煤矸石用量/g	m（α-Fe₂O₃）:m（煤矸石）
a	10.00	—	e	7.98	20:100
b	—	纯α-Fe₂O₃	f	5.32	30:100
c	31.94	5:100	g	3.99	40:100
d	15.97	10:100	h	3.19	50:100

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Preparation of α-Fe₂O₃/coal gangue composite photocatalyst and its application in pentachlorophenol degradation

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Preparation of α-Fe2O3/coal gangue composite photocatalyst and its application in pentachlorophenol degradation