化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (5) : 203-207.

科学研究

可见光响应型球形Zn/BiOBr的制备及其光催化性能研究

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^1,2*

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Synthesis and the photocatalysis of visible-light-sensitive spherical Zn/BiOBr

Xu Congcong^1,2, Liu Chenglun^1,2, Xu Longjun²

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文章历史 +

Received
2017-12-28
Issue Date	Revised Date
2019-06-17	2017-12-28

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摘要

采用溶剂热法制备Zn²⁺掺杂的溴氧化铋(BiOBr)(Zn/BiOBr)光催化剂,通过X射线衍射仪、扫描电子显微镜、比表面积孔径分析仪对其结构形貌进行分析表征,并考察了其对罗丹明B(RhB)的光催化活性。结果表明,Zn²⁺掺杂量不同的Zn/BiOBr均为四方晶型,掺入Zn²⁺后Zn/BiOBr样品的禁带宽度缩小、比表面积增大,光催化活性均明显提高,且10%Zn/BiOBr光催化活性最高;用蓝色LED光照射120min,其对RhB溶液的光降解率达到96%,比纯BiOBr的降解效率提高16%。循环使用3次后,Zn/BiOBr降解率仍达到85%,光催化过程中h⁺和·O^-₂是主要的活性物质。

Abstract

Zn²⁺ doped BiOBr (Zn/BiOBr) photocatalysts were prepared by solvothermal method,the structural and the photocatalytic performances of products were characterized by SEM,XRD,DRS,BET and the photo-degradation of rhodamine B (RhB).Experimental results showed that Zn/BiOBr were tetragonal phase,Zn/BiOBr samples had lower band gaps and higher specific surface area,which contributed to the higher photocatalytic performance.What is more,10% Zn/BiOBr samples revealed the most efficient for degradating RhB and the degradation rate were 96% within 120min under blue LED,which increased by 16% than that of pure BiOBr.After cycling for three times,the degradation rate of RhB maintained 85%.The results also suggested that h⁺ and ·O^-₂ were the main reactive species in the photocatalytic process for Rh B degradation.

关键词

Zn/BiOBr / 可见光催化活性 / LED / 光降解

Key words

Zn/BiOBr / visible photocatalytic activity / LED / photodegradation

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可见光响应型球形Zn/BiOBr的制备及其光催化性能研究[J]. 化工新型材料, 2019, 47(5): 203-207 DOI:

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Luo B,Liu G,Wang L.Recent advances in 2D materials for photocatalysis[J].Nanoscale,2016,8(13):6904-6920.
[2] Liu Y,Xu J,Wang L,et al.Three-dimensional BiOI/BiOX(X=Cl or Br) nanohybrids for enhanced visible-light photocatalytic activity[J].Nanomaterials,2017,7(3):64-82.
[3] Guo S,Deng Z,Li M,et al.Phosphorus-doped carbon nitride tubes with a layered micro-nanostructure for enhanced visible-Light photocatalytic hydrogen evolution[J].Angewandte Chemie International Edition,2016,55(5):1830-1834.
[4] Huo Y,Zhang J,Miao M,et al.Solvothermal synthesis of flower-like BiOBr microspheres with highly visible-light photocatalytic performances[J].Applied Catalysis B:Environmental,2012,111-112:334-341.
[5] Cheng H,Huang B,Dai Y.Engineering BiOX(X=Cl,Br,I) nanostructures for highly efficient photocatalytic applications[J].Nanoscale,2014,6(4):2009-2026.
[6] Jiang J,Zhao K,Xiao X,et al.Synthesis and facet-dependent photoreactivity of BiOCl single-crystalline nanosheets[J].Journal of the American Chemical Society,2012,134(10):4473-4476.
[7] Xu J,Li L,Guo C,et al.Removal of benzotriazole from solution by BiOBr photocatalysis under simulated solar irradiation[J].Chemical Engineering Journal,2013,221(4):230-237.
[8] Natarajan K,Bajaj H C,Tayade R J.Photocatalytic efficiency of bismuth oxyhalide (Br,Cl and I) nanoplates for RhB dye degradation under LED irradiation[J].Journal of Industrial and Engineering Chemistry,2016,34(25):146-156.
[9] 陈振,杨阳.复合材料BiOBr_xCl_1-x的制备及可见光催化降解罗丹明B[J].材料导报,2016,30(S2):492-494;530.
[10] Geng Y,Li N,Ma J,et al.Preparation,characterization and photocatalytic properties of BiOBr/ZnO composites[J].Journal of Energy Chemistry,2017(3):416-421.
[11] Jiang G,Wang X,Wei Z,et al.Photocatalytic properties of hierarchical structures based on Fe-doped BiOBr hollow microspheres[J].Journal of Materials Chemistry A,2013,1(7):2406-2410.
[12] 周薇,胡晓龙,赵小蓉,等.石墨烯-溴氧化铋复合物的制备及可见光光催化性能研究[J].分子催化,2014,28(4):367-375.
[13] Jiang G,Wang R,Wang X,et al.Novel highly active visible-light-induced photocatalysts based on BiOBr with Ti doping and Ag decorating[J].ACS Applied Materials & Interfaces,2012,4(9):4440-4444.
[14] Kanagaraj T,Thiripuranthagan S.Photocatalytic activities of novel SrTiO₃-BiOBr heterojunction catalysts towards the degradation of reactive dyes[J].Applied Catalysis B Environmental,2017,207:218-232.
[15] Liu Z S,Wu B T,Zhao Y L,et al.Solvothermal synthesis and photocatalytic activity of Al-doped BiOBr microspheres[J].Ceramics International,2014,40(4):5597-5603.
[16] Malengreaux C M,Pirard S L,Bartlett J R,et al.Kinetic study of 4-nitrophenol photocatalytic degradation over a Zn²⁺ doped TiO₂ catalyst prepared through an environmentally friendly aqueous sol-gel process[J].Chemical Engineering Journal,2014,245:180-190.
[17] Li Y,Wang Z,Huang B,et al.Synthesis of BiOBr-PVP hybrids with enhanced adsorption-photocatalytic properties[J].Applied Surface Science,2015,347:258-264.
[18] 周海芳,王谢春,郑巧,等.Na⁺掺杂KLaF₄∶Er³⁺/Yb³⁺纳米晶上转换发光性能的研究[J].人工晶体学报,2016,45(4):886-891.
[19] Yuan M,Tian F,Li G,et al.Fe(Ⅲ)-modified BiOBr hierarchitectures for improved photocatalytic benzyl alcohol oxidation and organic pollutants degradation[J].Industrial & Engineering Chemistry Research,2017,56(20):5935-5943.
[20] Belver C,Bedia J,Alvarez-Montero M A,et al.Solar photocatalytic purification of water with Ce-doped TiO₂/clay heterostructures[J].Catalysis Today,2016,266:36-45.