化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (12) : 165-168.

科学研究

α-Fe₂O₃-ZnO/煤矸石复合光催化剂的制备及其降解五氯酚性能的研究

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Preparation of α-Fe₂O₃-ZnO/coal gangue composite photocatalyst and their application in PCP degradation

Xie Juan¹, Xia Runnan², Du Hongxia¹, Zhao Shuchun¹, Xu Hong¹, Kang Wentong¹

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Received		Published
2018-06-13		2019-12-20
Issue Date	Revised Date
2020-01-03	2018-06-13

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摘要

以氯化铁(FeCl₃)、氯化锌(ZnCl₂)、煤矸石和氢氧化钠(NaOH)为原料,采用沸腾回流法制得了一系列纳米三氧化二铁(α-Fe₂O₃)和氧化锌(ZnO)不同摩尔配合比的纳米三氧化二铁-氧化锌/煤矸石复合光催化剂(α-Fe₂O₃-ZnO/煤矸石复合光催化剂),并对产物进行了表征。以五氯酚(PCP)为目标降解物,考察了模拟太阳光照条件下样品的光催化降解效果。结果表明,将球形α-Fe₂O₃-ZnO复合物负载于改性煤矸石表面可有效提高其光催化活性,且α-Fe₂O₃-ZnO/煤矸石复合光催化剂的性能与α-Fe₂O₃和ZnO的摩尔配合比有关,在α-Fe₂O₃与ZnO的摩尔配合比为1∶5,光照4h条件下,α-Fe₂O₃-ZnO/煤矸石复合光催化剂对PCP的降解率达到100%,具有最佳的光催化降解效果,此外还具有可重复使用的特点。

Abstract

Using ferric chloride,zinc chloride,coal gangue and sodium hydroxide as the reactants,α-Fe₂O₃-ZnO/coal gangue composite photocatalysts with different mole ratios of α-Fe₂O₃ to ZnO 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 samples was investigated for degradation of pentachlorophenol (PCP) under simulated sunlight.The results indicated that loading spherical α-Fe₂O₃-ZnO composite on the surface of modified coal gangue can effectively improve its catalytic activity,and there was a close relationship between the photocatalytic performance of the composites and the mole ratios of α-Fe₂O₃ to ZnO.When the molar ratio of α-Fe₂O₃ to ZnO was 1∶5,the photocatalyst shown the highest performance and the degradation rate of PCP was up to 100% within 4h.In addition,this catalysts can be used repeatedly.

关键词

纳米三氧化二铁-氧化锌 / 煤矸石 / 制备 / 光催化性能 / 五氯酚

Key words

α-Fe₂O₃-ZnO / coal gangue / preparation / photocatalytic performance / pentachlorophenol

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α-Fe₂O₃-ZnO/煤矸石复合光催化剂的制备及其降解五氯酚性能的研究[J]. 化工新型材料, 2019, 47(12): 165-168 DOI:

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Hariharan C.Photocatalytic degradation of organic contaminants in water by ZnO nanoparticles:revisited[J].Applied Catalysis A,2006,304:55-61.
[2] Sakthivel S,Geissen S U,Bahnemann D W,et al.Enhancement of photocatalytic activity by semiconductor heterojunctions:α-Fe₂O₃,WO₃ and CdS deposited on ZnO[J].Journal of Photochemistry and Photobiology A,2002,148(1/3):283-293.
[3] Yan W,Fan H Q,Yang C.Ultra-fast synthesis and enhanced photocatalytic properties of alpha-Fe₂O₃/ZnO core-shell structure[J].Materials Letters,2011,65(11):1595-1597.
[4] 徐光辉.α-Fe₂O₃与TiO₂、ZnO复合纳米材料及光催化研究[D].济南:山东大学,2007.
[5] 雷锐,陈荣生,张博威,等.Fe₂O₃/ZnO纳米复合结构的制备及其光催化性能研究[J].武汉科技大学学报,2017,40(6):415-421.
[6] 周振,曾玉凤.ZnO/Fe₂O₃光催化降解苯酚[J].玉林师范学院学报(自然科学),2011,32(5):69-72.
[7] 王丹萍,李巧玲.热法制备改性煤矸石/TiO₂复合光催化材料的催化性能[J].化工中间体,2014(5):56-60.
[8] 李燕,杨旭光,孙道胜,等.铋基碘氧化物/煤矸石复合粉体的制备及光催化性能[J].人工晶体学报,2016,45(2):430-434.
[9] 李燕,杨旭光,曹林林.Bi₂S₃-BiOCl/煤矸石复合光催化剂的制备及光催化性能[J].复合材料学报,2017,34(8):1847-1852.
[10] Quan X,Ruan X L,Zhao H M,et al.Photoelectrocatalytic degradation of pentachlorophenol in aqueous solution using a TiO₂ nanotube film electrode[J].Environmental Pollution,2007,147(2):409-414.
[11] 孙统才.可回收纳米吸附催化材料煤矸石/Fe₃O₄@TiO₂的制备及其表征[D].太原:中北大学,2016.
[12] 陈江华.改性煤矸石的制备及对废水中Cr(Ⅵ)的吸附性能研究[J].山西煤炭,2013,33(11):27-28.
[13] 郭旭颖,董艳荣,狄军贞,等.改性煤矸石对煤矿酸性废水中Fe²⁺、Mn²⁺的吸附[J].非金属矿,2017,40(2):83-87.
[14] 范立群,李正炎,杨丽娜.煤矸石的改性及其对废水中Pb²⁺的吸附性能研究[J].青岛理工大学学报,2010,31(3):64-68.
[15] 张铁军,宋矗森,陈莉荣,等.煤矸石复合吸附剂对Zn²⁺的吸附性能[J].环境保护科学,2016,42(5):96-101.
[16] Xie J,Zhang L,Li M X,et al.α-Fe₂O₃ modified ZnO flower-like microstructures with enhanced photocatalytic performance for pentachlorophenol degradation[J].Ceramics International,2015,41(8):9420-9425.
[17] Xie J,Zhou Z,Lian Y W,et al.Synthesis of α-Fe₂O₃/ZnO composites for photocatalytic degradation of pentachlorophenol under UV-Vis light irradiation[J].Ceramics International,2015,41(2):2622-2625.