SmVO_4纳米粒子的制备及其可见光催化活性研究
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摘要
以硝酸钐[Sm(NO_3)_3·6H_2O]和钒酸钠(Na_3VO_4)为原料,采用直接沉淀法在三乙醇胺-丙三醇-乙醇混合有机溶剂体系中制备钒酸钐(SmVO_4)纳米粒子,考察其对罗丹明B的可见光催化降解活性,并对其进行表征。研究结果表明:浓度均为0.05mol/L的Sm(NO_3)_3·6H_2O和Na_3VO_4溶液在三乙醇胺、丙三醇和乙醇体积配合比为1∶1∶3的溶液体系中反应3.0h获得分散性好、平均粒径约100nm、比表面积103.4m~2/g的SmVO4纳米粒子,SmVO_4纳米粒子对罗丹明B的降解率达到58.7%,具有较好的光催化活性。
SmVO_4 nanoparticles were obtained via a direct deposition route in triethanolamine-glycerolethanolmixed mixed organic solvent,in which Sm(NO_3)_3·6 H_2O and Na_3VO_4 were used as raw materials.The asprepared SmVO_4 was performed for the photocatalytic degradation of rhodamine B under visible light irradiation.The physical and chemical properties of as-obtained sample were also characterized.Results suggested that SmVO_4 sample with well-dispersion,a uniform particle size of 100 nm,and a specific surface area of 103.4 m~2/g was successfully synthesized under the optimum conditions.The optimum experimental conditions were:volume ratio of triethanolamine,glycerol,and ethanol in above mixed solvent,1∶1∶3;Sm(NO_3)_3·6 H_2O concentration,0.05 mol/L;Na_3VO_4 concentration,0.05 mol/L;reaction time 3 h.The degradation rate of rhodamine B by SmVO_4 nanoparticles was 58.7%,which proved that the photocatalytic activity of SmVO_4 nanoparticles was good.
SmVO_4 nanoparticles were obtained via a direct deposition route in triethanolamine-glycerolethanolmixed mixed organic solvent,in which Sm(NO_3)_3·6 H_2O and Na_3VO_4 were used as raw materials.The asprepared SmVO_4 was performed for the photocatalytic degradation of rhodamine B under visible light irradiation.The physical and chemical properties of as-obtained sample were also characterized.Results suggested that SmVO_4 sample with well-dispersion,a uniform particle size of 100 nm,and a specific surface area of 103.4 m~2/g was successfully synthesized under the optimum conditions.The optimum experimental conditions were:volume ratio of triethanolamine,glycerol,and ethanol in above mixed solvent,1∶1∶3;Sm(NO_3)_3·6 H_2O concentration,0.05 mol/L;Na_3VO_4 concentration,0.05 mol/L;reaction time 3 h.The degradation rate of rhodamine B by SmVO_4 nanoparticles was 58.7%,which proved that the photocatalytic activity of SmVO_4 nanoparticles was good.
引文
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[3]崔玉民,张文保,苗慧,等.g-C3N4/TiO2复合光催化剂的制备及其性能的研究[J].应用化学,2014,43(8):1396-1407.
[4]Ong W J,Tan L L,Chai S P,et al.Facet-dependent photocatalytic properties of TiO2-based composites for energy conversion and environmental remediation[J].Chem Sus Chem,2014,7:690-719.
[5]郭雅容,陈志鸿,刘琼,等.石墨相氮化碳光催化研究进展[J].化工进展,2016,35(7):2063-2070.
[6]汪滨,张广心,郑水林,等.Ce掺杂纳米TiO2/硅藻土复合材料的光催化性能[J].硅酸盐学报,2016,44(8):1192-1199.
[7]Durgakumari V,Subrahmanyam M,Subba R K V,et al.An easy and efficient use of TiO2supported HZSM-5and TiO2+HZSM-5zeolite combinate in the photo degradation of aqueous phenol and p-chlorophenol[J].Appl Catal A Gen,2002,234:155-165.
[8]Zhang H,Lv X,Li Y,et al.P25-graphene composite as a high performance photocatalyst[J].ACS Nano,2003,4(1):380-386.
[9]Mahapatra S,Madras G,Guru R T N,et al.Synthesis,characterization and photocatalytic activity of lanthanide(Ce,Pr and Nd)orthovanadates[J].Ind Eng Chem Res,2007,46:1013-1017.
[10]Selvan Pk,Gedanken A,Anikumur P,et al.Synthesis and characterization of rare earth orthovanadate nanorods/nanocrystals/nanospindles by a facil sonochemical method and their catalytic properties[J].Clust Sci,2009,147:291-305.
[11]Li Tingting,Zhao Leihong,He Yiming,et al.Synthesis of gC3N4/SmVO4composite photocatalyst with improved visible light photocatalytic activities in RhB degradation[J].Appl Catal B-Environ,2013,129:255-263.
[12]Tian Y,Chang B,Yang Z,et al.Graphitic carbon nitride-BiVO4heterojunctions:simple hydrothermal synthesis and high photocatalytic performances[J].Rsc Advances,2013(8):4187-4193.
[13]Dong L,He Y,Lin H,et al.Preparation,characterization and photocatalytic activity of graphene doped SmVO4photocatalyst[J].Materials Letters,2014,122(5):17-20.
[14]Neeraj S,Kijima N,Cheetham A K,et al.Novel red phosphors for solid state lighting:the system BixLn1-x VO4∶Eu3+/Sm3+(Ln=Y,Gd)[J].Solid State Commun,2004,131(1):65-69.
[15]Li K T,Chi Z H.Selective oxidation of hydrogen sulfide on rare orthovanadate and magnesium vanadates[J].Appl Catal(A)General,2001,206:197-203.
[16]张萍,王焕英,许保恩,等.化学沉淀法制备BiVO4及其表征[J].人工晶体学报,2008,37(3):716-720.
[17]Nguyen T D,Dinh C T,Do T O.Monodisperse samarium and cerium orthovanadate nanocrystals and metal oxidation states on the nanocrystal surface[J].Langmuir,2009,25(18):11142-11148.
[18]Su X Q,Yan B.In situ chemical co-precipitation synthesis of YVO4:RE(RE=Dy3+,Sm3+,Er3+)phosphors by assembling hybrid precursors[J].J Non-Cryst Solids,2005,351:3542-3546.
[19]Sun L,Zhang Y,Zhang J,et al.Fabrication of size controllable YVO4 nanoparticles via micromulsion-mediated synthetic process[J].Solid State Comm,2002,124:35-38.
[20]Yu M,Lin J,Wang Z,et al.Fabrication,Patterning,andoptical properties of nanocrystalline YVO4∶a(A=Eu3+,Dy3+,Sm3+,Er3+)phosphor films via Sol-Gel soft lithography[J].Chem Mater,2002,14(5):2224-2231.