钒酸铋的选择性合成及其光催化性能研究
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摘要
采用微波水热法,以硝酸铋和偏钒酸铵为原料,通过控制反应温度实现了对钒酸铋(BiVO4)晶体结构的调控,选择性制备出四方锆石结构BiVO4(z-t)和单斜白钨矿结构BiVO4(s-m)。对样品进行了X射线衍射、扫描电子显微镜、紫外-可见漫反射等表征分析,并以亚甲基蓝(MB)的降解考察了样品的可见光催化性能。结果表明,反应温度对BiVO4的晶体结构和形貌均有较大影响,BiVO4(s-m)表现出较高的可见光催化活性,可见光照射5h,MB的降解率为90%。
Using bismuth nitrate and ammonium metavanadate as raw materials,the visible-light-driven photocatalyst bismuth vanadate(BiVO4)were synthesized via a microwave hydrothermal method.BiVO4(z-t)and BiVO4(s-m) were selective synthesized by controlling the temperature of reaction solution under microwave hydrothermal process.The as-synthesized samples were characterized by X-ray powder diffraction,UV-Vis diffuse reflectance spectroscopy and scanning electron microscopy.The photocatalytic activity was investigated using methylene blue as the target degradation material.The results showed that the reaction temperature had a great influence on the crystal form and morphology of BiVO4 photocatalyst,and the BiVO4(s-m)showed higher photocatalytic activity than that of BiVO4(z-t),and the degradation rate of MB was 90% under visible light irradiation for 5 h.
Using bismuth nitrate and ammonium metavanadate as raw materials,the visible-light-driven photocatalyst bismuth vanadate(BiVO4)were synthesized via a microwave hydrothermal method.BiVO4(z-t)and BiVO4(s-m) were selective synthesized by controlling the temperature of reaction solution under microwave hydrothermal process.The as-synthesized samples were characterized by X-ray powder diffraction,UV-Vis diffuse reflectance spectroscopy and scanning electron microscopy.The photocatalytic activity was investigated using methylene blue as the target degradation material.The results showed that the reaction temperature had a great influence on the crystal form and morphology of BiVO4 photocatalyst,and the BiVO4(s-m)showed higher photocatalytic activity than that of BiVO4(z-t),and the degradation rate of MB was 90% under visible light irradiation for 5 h.
引文
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[21]Kudo A,Tsuji I,Kato H.AgInZn7S9solid solution photocatalyst for H2 evolution from aqueous solutions under visible light irradiation[J].Chemical Communication,2002,8(17):1958-1959.
[22]Zhang T Y,Oyama T,Aoshima A,et al.Photooxidative Ndemethylation of methylene blue in aqueous TiO2dispersions under UV irradiation[J].Journal of Photochemistry and Photobiology A:Chemistry,2001,140:163-172.
[23]Dong S Y,Yu C F,Li Y K,et al.Controlled synthesis of Tshaped BiVO4and enhanced visible light responsive photocatalytic activity[J].Journal of Solid State Chemistry,2014,211:176-183.
[2]Li C M,Chen G,Sun J X,et al.A Novel mesoporous singlecrystal-like Bi2WO6 with enhanced photocatalytic activity for pollutants degradation and oxygen production[J].ACS Applied Materials&Interfaces,2015,7(46):25716-25724.
[3]Huang H W,Cao R R,Yu S X,et al.Single-unit-cell layer established Bi2WO63Dhierarchical architectures:efficient adsorption,photocatalysis and dye-sensitized photoelectrochemical performance[J].Applied Catalysis B:Environmental,2017,219:526-573.
[4]Bai J W,Li Y,Liu J D,et al.3DBi2MoO6hollow mesoporous nanostructures with high photodegradation for tetracycline[J].Microporous and Mesoporous Materials,2017,240:91-95.
[5]Yang Z X,Shen M,Dai K,et al.Controllable synthesis of Bi2MoO6 nanosheets and their facet-dependent visible-lightdriven photocatalytic activity[J].Applied Surface Science,2018,430:505-514.
[6]Tan H L,Amal R,Ng Y H.Exploring the different roles of particle size in photoelectrochemical and photocatalytic water oxidation on BiVO4[J].ACS Applied Materials&Interfaces,2016,8(42):28607-28614.
[7]Xi G C,Ye J H.Synthesis of bismuth vanadate nanoplates with exposed{001}facets and enhanced visible-light photocatalytic properties[J].Chemical Communication,2010,46:1893-1895.
[8]Chang X F,Chang J,Feng J,et al.BiOX(X=Cl,Br,I)photocatlysts prepared using NaBiO3as the Bi souce:characterization and catalytic performance[J].Catalysis Communication,2010,11(5):460-464.
[9]Tang J W,Zou Z G,Ye J H,et al.Efficient photocatalytic decomposition of organic contaminants over CaBi2O4under visible-light irradiation[J].Angewandte Chemie International Edition,2004,43:4463-4466.
[10]杨宗志.新型无机黄色染料-铋黄[J].化工新型材料,1996,8:23-25.
[11]贠丽敏,杨占旭,单爽,等.不同形貌钒酸铋的制备及光催化性能研究[J].化工新型材料,2017,45(2):165-167.
[12]高善民,乔青安,赵培培,等.沉淀法制备不同形貌和结构的纳米BiVO4[J].无机化学学报,2007,23(7):1153-1157.
[13]Kudo A,Omori K,Kato H.A novel aqueous process for preparation of crystal form-controlled and highly crystalline BiVO4powder from layered vanadates at room temperature and its photocatalytic and photophysical properties[J].Journal of the American Chemical Society,1999,121(49):11459-11467.
[14]Tokunaga S,Kato H,Kudo A.Selective preparation of monoclinic and tetragonal BiVO4 with scheelite structure and their photocatalytic properties[J].Chemistry of Materials,2001,13(12):4624-4628.
[15]Zhang X,Ai Z H,Jia F L,et al.Selective synthesis and visiblelight photocatalytic activities of BiVO4 with different crystalline phase[J].Materials Chemistry and Physics,2007,103:162-167.
[16]许杰,郝辰春,王文忠.晶相、形貌和尺寸可控的BiVO4微球控制合成[J].化工新型材料,2016,44(4):137-139.
[17]Meng L Y,Wang B,Ma M G,et al.The progress of microwave-assisted hydrothermal method in the synthesis of function nanomaterials[J].Materials Today,2016,1-2:63-83.
[18]Wu L,Bi J H,Li Z H,et al.Rapid preparation of Bi2WO6photocatalyst with nanosheet morphology via microwave-assisted solvothermal sythesis[J].Catalysis Today,2008,131:15-20.
[19]孟岩,黄剑锋,费杰,等.pH值对微波水热合成BiVO4微晶形貌及光学性能的影响[J].硅酸盐学报,2013,41(5):720-724.
[20]陶靖鹏,张寒冰,覃岳隆,等.微波水热制备BiVO4及其可见光催化降解茜素红S[J].水处理技术,2015,14(11):39-42.
[21]Kudo A,Tsuji I,Kato H.AgInZn7S9solid solution photocatalyst for H2 evolution from aqueous solutions under visible light irradiation[J].Chemical Communication,2002,8(17):1958-1959.
[22]Zhang T Y,Oyama T,Aoshima A,et al.Photooxidative Ndemethylation of methylene blue in aqueous TiO2dispersions under UV irradiation[J].Journal of Photochemistry and Photobiology A:Chemistry,2001,140:163-172.
[23]Dong S Y,Yu C F,Li Y K,et al.Controlled synthesis of Tshaped BiVO4and enhanced visible light responsive photocatalytic activity[J].Journal of Solid State Chemistry,2014,211:176-183.