化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (5) : 218-223. DOI: 10.19817/j.cnki.issn1006-3536.2023.05.040

科学研究

一步法快速合成Fe掺杂混晶TiO₂及其增强太阳光催化活性研究

李崇裔, 谢桂容, 谈瑛, 张翔, 唐淑贞, 刘宏

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One-step rapid synthesis of Fe-doped mixed crystal TiO₂ and its enhanced photocatalytic activity

Li Chongyi, Xie Guirong, Tan Ying, Zhang Xiang, Tang Shuzhen, Liu Hong

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Received		Published
2022-11-01		2023-05-20
Issue Date	Revised Date
2023-05-31	2022-11-01

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摘要

基于半导体能带理论,设计并制备了不同浓度Fe掺杂的球形混晶TiO₂基光催化剂,利用X射线衍射、紫外-可见吸收光谱、X射线光电子能谱、扫描电镜、透射电镜、能谱分析、荧光光谱等测试方法对样品进行系统性表征,并以甲基橙(MO)溶液为目标污染物模拟印染废水,研究样品在太阳辐射下的光催化性能。结果表明:TiO₂具有锐钛矿/金红石/板钛矿三相混晶结构,Fe掺杂能明显促进锐钛矿向金红石转变,显著提高太阳光利用率和有效抑制光生载流子复合;2% Fe³⁺/TiO₂的光催化活性表现最佳,其对MO的催化降解效率高达94.6%(120min),反应速率常数为23.22×10^-3min^-1;活性组分猝灭实验证实h⁺氧化是降解MO的核心机制,·OH和·O^-₂则发挥次要作用。

Abstract

A series of spherical mixed crystal TiO₂-based photocatalysts with different Fe-doping concentration were designed and fabricated based on the band theory of semiconductor.The samples were systematically characterized by various methods including XRD,UV-Vis,XPS,SEM,TEM,EDS and PL.The photocatalytic activities of the samples under solar radiation were also studied by using methyl orange (MO) solution as targeted contaminant to simulate dyeing wastewater.The results indicated TiO₂ had a three-phase mixed crystalline structure of anatase/rutile/brookite,and Fe doping contributed a lot to the phase transition from anatase to rutile,significant enhancement of the utilization of sunlight and the inhibition of the recombination of photo-induced electron-hole pairs.Moreover,2% Fe³⁺/TiO₂ showed the best photocatalytic activity with a catalytic degradation efficiency of 94.6%(120 min)for MO and a reaction rate constant of 23.22×10^-3min^-1.Furthermore,the analysis by scavenging experiments of reactive species confirmed that h⁺ oxidation was the core mechanism for MO degradation,while ·OH and ·O^-₂ played a relatively minor role.

关键词

Fe掺杂二氧化钛 / 混晶 / 光催化活性 / 太阳辐射

Key words

Fe-doping TiO₂ / mixed crystal / photocatalytic activity / solar radiation

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一步法快速合成Fe掺杂混晶TiO₂及其增强太阳光催化活性研究[J]. 化工新型材料, 2023, 51(5): 218-223 DOI:10.19817/j.cnki.issn1006-3536.2023.05.040

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Zhao X L,Wang X J,Song G J,et al.Microwave assisted copolymerization of sodium alginate and dimethyl diallyl ammonium chloride as flocculant for dye removal[J].International Journal of Biological Macromolecules,2020,156:585-590.
[2] Wei T T,Wu L,Yu F,et al.pH-responsive chitosan-based flocculant for precise dye flocculation control and the recycling of textile dyeing effluents[J].RSC Advances,2018,8:39334-39340.
[3] Hu E L,Wu X B,Shang S M,et al.Catalytic ozonation of simulated textile dyeing wastewater using mesoporous carbon aerogel supported copper oxide catalyst[J].Journal of Cleaner Production,2016,112:4710-4718.
[4] Zhang J,Huang G Q,Liu C,et al.Synergistic effect of microbubbles and activated carbon on the ozonation treatment of synthetic dyeing wastewater[J].Separation and Purification Technology,2018,201:10-18.
[5] Li F,Huang J H,Xia Q,et al.Direct contact membrane distillation for the treatment of industrial dyeing wastewater and characteristic pollutants[J].Separation and Purification Technology,2018,195:83-91.
[6] Bian X J,Huang J P,Qiu L,et al.Preparation,characterization and dyeing wastewater treatment of a new PVDF/PMMA five-bore UF membrane with β-cyclodextrin and additive combinations[J].Water Science & Technology,2021,83(8):1847-1862.
[7] Khosravi R,Hossini H,Heidari,et al.Electrochemical decolorization of reactive dye from synthetic wastewater by mono-polar aluminum electrodes system[J].International Journal of Electrochemical Science,2017,12:4745-4755.
[8] Wang L,Wen M,Wang W Y,et al.Photocatalytic degradation of organic pollutants using rGO supported TiO₂-CdS composite under visible light irradiation[J].Journal of Alloys and Compounds,2016,683:318-328.
[9] Lam S M,Sin J C,Mohamed A R.A review on photocatalytic application of g-C₃N₄/semiconductor(CNS) nanocomposites towards the erasure of dyeing wastewater[J].Materials Science in Semiconductor Processing,2016,47:62-84.
[10] Huang H,He M R,Yang X,et al.One-pot hydrothermal synthesis of TiO₂/RCN heterojunction photocatalyst for production of hydrogen and rhodamine B degradation[J].Applied Surface Science,2019,493:202-211.
[11] Si Y J,Liu H H,Li N T,et al.SDBS-assisted hydrothermal treatment of TiO₂ with improved photocatalytic activity[J].Materials Letters,2018,212:147-150.
[12] Zhao W X,Liu S,Zhang S,et al.Preparation and visible-light photocatalytic activity of N-doped TiO₂ by plasma-assisted sol-gel method[J].Catalysis Today,2019,337:37-43.
[13] Panomsuwan G,Wongcharoen S,Chokradcharoen C,et al.Au nanoparticle-decorated TiO₂ hollow fibers with enhanced visible-light photocatalytic activity toward dye degradation[J].RSC Advances,2022,12:193-200.
[14] Li C C,Han Q Y,Pan Y F,et al.Insights into the photosensitization activity of zirconium-titanium pyrophosphate under visible light irradiation[J].Materials Letters,2020,268:127399.
[15] Mousa H M,Alenezi J F,Mohamed I M.A,et al.Synthesis of TiO₂@ZnO heterojunction for dye photodegradation and wastewater treatment[J].Journal of Alloys and Compounds,2021,886:161169.
[16] Zhu X D,Han S H,Feng W,et al.The effect of heat treatment on the anatase-rutile phase transformation and photocatalytic activity of Sn-doped TiO₂ nanomaterials[J].RSC Advances,2018,8:14249-14257.
[17] Jahdi M,Mishra S B,Nxumalo E N,et al.Smart pathways for the photocatalytic degradation of sulfamethoxazole drug using F-Pd co-doped TiO₂ nanocomposites[J].Applied Catalysis B:Environmental,2020,267:118716.
[18] Lv T P,Zhao J H,Chen M P,et al.Boosted visible-light photodegradation of methylene blue by V and Co Co-Doped TiO₂[J].Materials,2018,11:1946-1957.
[19] Hu H Y,Lin Y,Hu Y H.Core-shell structured TiO₂ as highly efficient visible light photocatalyst for dye degradation[J].Catalysis Today,2020,341:90-95.
[20] Yu C L,Liu H,Song J,et al.Can mixed anatase and rutile photocatalyst TiO₂ be synthesized under high pressure in water[J].Materials Letters,2019,246:133-136.
[21] Liu X H,Hua R N,Niu J H,et al.N₂ plasma treatment TiO₂ nanosheets for enhanced visible light-driven photocatalysis[J].Journal of Alloys and Compounds,2021,881:160509.
[22] Lecki T,Zarebska K,Sobczak K,et al.Photocatalytic degradation of 4-chlorophenol with the use of FTO/TiO₂/SrTiO₃ composite prepared by microwave-assisted hydrothermal method[J].Applied Surface Science,2019,470:991-1002.
[23] Yang Z R,He Z Y,Wu W L,et al.Preparation of graphene-TiO₂ photocatalysis materials by laser-induced hydrothermal method[J].Colloid and Interface Science Communications,2021,42:100408.