化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (12) : 204-208. DOI: 10.19817/j.cnki.issn 1006-3536.2020.12.048

科学研究

Fe-TiO₂-SiO₂/QCS复合膜催化剂的制备及其甲基橙光降解性能研究

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Preparation of Fe-TiO₂-SiO₂/QCS composite membrane catalyst and its photodegradation performance of methyl orange

Hao Mintong, Wang Jilin, Wang Lulu

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Received		Published
2019-08-19		2020-12-20
Issue Date	Revised Date
2021-01-21	2019-08-19

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摘要

在季铵化壳聚糖(QCS)铸膜液中,借助水解反应将Fe-TiO₂和Fe₂O₃量子点负载于多孔SiO₂孔结构中,制备Fe-TiO₂-SiO₂/QCS复合膜催化剂。通过X射线衍射、透射电镜和红外光谱对其进行表征。结果表明:当Ti/Fe(摩尔比)≥10时,形成Fe-TiO₂量子点;当Ti/Fe(摩尔比)≤3时,形成Fe₂O₃量子点。以甲基橙为模型污染物,在λ=365nm的辐射源辐照下,研究Fe-TiO₂-SiO₂/QCS膜催化剂催化降解甲基橙染料的性能。结果表明:当甲基橙初始浓度C₀=10mg/L,pH=2时,Ti/Fe=3的复合膜催化剂对甲基橙溶液的降解率达到最大值(90%),明显高于只含TiO₂复合膜催化剂相同条件下光催化降解甲基橙的降解率(60%)。

Abstract

Fe-TiO₂ and Fe₂O₃ quantum dots were supported in the SiO₂ structure by hydrolysis reaction,and then the quaternized chitosan was used as the film matrix.The above materials were introduced into the quaternized chitosan (QCS) casting solution to prepare Fe-TiO₂-SiO₂/QCS composite membrane catalyst.The catalyst was characterized by XRD,TEM and FT-IR.The results shown that when Ti/Fe (molar ratio)≥10,Fe-TiO₂ quantum dots were formed.When Ti/Fe (molar ratio)≤3,additional Fe₂O₃ quantum dots were formed.The photocatalytic degradation of methyl orange was studied by Fe-TiO₂-SiO₂/QCS film under ultraviolet light λ=365nm with methyl orange as a pollutant model.The initial concentration of methyl orange solution and the effect of pH value on the catalytic efficiency of the membrane were investigated.When the initial concentration of methyl orange C₀=10mg/L,pH=2,the degradation rate of the Ti/Fe=3 membrane to methyl orange solution reached a maximum of 90%.It was significantly higher than the 60% degradation rate of photocatalytic degradation of methyl orange under the same conditions of TiO₂ composite membrane catalyst alone.

关键词

二氧化钛 / 三氧化二铁 / 二氧化硅 / 量子点 / 光催化 / 甲基橙

Key words

TiO₂ / Fe₂O₃ / SiO₂ / quantum dot / photocatalysis / methyl orange

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Fe-TiO₂-SiO₂/QCS复合膜催化剂的制备及其甲基橙光降解性能研究[J]. 化工新型材料, 2020, 48(12): 204-208 DOI:10.19817/j.cnki.issn 1006-3536.2020.12.048

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Khataee A R,Kasiri M B.Photocatalytic degradation of organic dyes in the presence of nanostructured titanium dioxide:influence of the chemical structure of dyes[J].Journal of Molecular Catalysis A Chemical,2010,328(1):8-26.
[2] 戚永洁,李俊波,蒋素英,等.印染废水的复合氧化剂耦合铁碳流化床深度处理[J].印染,2017(16):19-22,28.
[3] Khataee A R,Pons M N,Zahraa O.Photocatalytic degradation of three azo dyes using immobilized TiO₂ nanoparticles on glass plates activated by UV light irradiation:influence of dye molecular structure[J].Journal of Hazardous Materials,2009,168(1):451-457.
[4] 李莉,郭伊荇,周萍,等.孔道结构H₃PW₁₂O₄₀/TiO₂的制备及其可见光光催化降解水溶性染料的性能[J].催化学报,2005,26(3):209-215.
[5] Cheng W,Yan L,Huisheng S,et al.Preparation and characterization of natural zeolite supported nano TiO₂,photocatalysts by a modified electrostatic self-assembly method[J].Surface & Interface Analysis,2015,47(1):142-147.
[6] 吴迪,李晨,季日鑫,等.球磨法制备La₂O₃和La³⁺掺杂TiO₂及光催化活性研究[J].化学研究与应用,2018,30(5):689-695.
[7] 徐旭.Cu₂O多面体/TiO₂复合半导体的制备及其光催化性能研究[D].天津:天津大学,2016.
[8] 潘伦,张靖雯,贾旭,等.基于WO_(3-x)量子点和TiO₂构建高效Z型光催化产氢催化剂(英文)[J].催化学报,2017,38(2):253-259.
[9] 司玉军,李敏娇,熊中平,等.TiO₂量子点修饰g-C₃N₄及其光催化脱色性能研究[J].钢铁钒钛,2018(3):46-50.
[10] 崔珺,王璐璐,王吉林,等.戊二醛含量对季铵化壳聚糖耐碱性能影响的研究[J].应用化工,2016,45(3):461-465.
[11] 秦传高,乔新平.Fe₂O₃-CuO/TiO₂催化湿式氧化甲基橙废水的研究[J].化工技术与开发,2018(5):55-57.
[12] 孙甲.高活性锐钛矿二氧化钛的制备及其光催化研究[D].扬州:扬州大学,2013.
[13] 丁鹏,赖于民,万顺鑫,等.SO^2-₄/Fe₂O₃-TiO₂光催化剂制备及对染料废水光活性研究[J].科学技术创新,2017(33):139-143.
[14] Nahar M S,Hasegawa K,Kagaya S.Photocatalytic degradation of phenol by visible light-responsive iron-doped TiO₂ and spontaneous sedimentation of the TiO₂ particles[J].Chemosphere,2006,65(11):1976-1982.
[15] Robertson J,Xiong K,Clark S J.Band structure of functional oxides by screened exchange and the weighted density approximation[J].Physica Status Solidi(B),2006,243(9):17.
[16] 王燕尊,封瑞江,王吉林.改性季铵化壳聚糖阴离子交换膜的制备与表征[J].化学与粘合,2012,34(5):4-8.
[17] 陈力豪,王璐璐,王吉林,等.双核碱性离子液体的合成及其在阴离子交换膜中的应用[J].化工进展,2016,35(4):1154-1161.
[18] Hamdy M S,Nickels P,Zhou H,et al.Parameters controlling the photocatalytic performance of ZnO/hombikat TiO₂ composites[J].Journal of Photochemistry & Photobiology A Chemistry,2012,228(1):1-7.
[19] Shen G,Pan L,Lü Z,et al.Fe-TiO₂,and Fe₂O₃,quantum dots co-loaded on MCM-41 for removing aqueous rose bengal by combined adsorption/photocatalysis[J].Chinese Journal of Catalysis,2018,39(5):920-928.
[20] 黄益操,赵浙菲,李世雄,等.Fe₂O₃/TiO₂纳米管阵列的制备及其光催化性能[J].无机化学学报,2015,31(1):133-139.