金属离子掺杂对BiVO_4黄色颜料性能的影响
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摘要
采用液相共沉淀法制备了Bi_(0.9)M_(0.1)VO_4(M=Zn、Y、La、Sm)黄色颜料。采用测色分光光度计、X-射线衍射仪、扫描电子显微镜、紫外/可见光反射光谱和红外光谱等分析手段研究了不同金属离子掺杂对BiVO_4基颜料的结构与呈色性能的影响。结果表明,Zn~(2+)掺杂未改变BiVO_4的单斜晶系结构,样品黄色度(b*)和颜色饱和度(C*)相对纯BiVO_4颜料明显提高,呈现鲜艳的绿相黄色。La~(3+)掺杂样品以单斜相为主,同时存在四方相,颜料b*值降低,呈现红相黄色。采用Y~(3+)和Sm~(3+)掺杂时,样品完全由四方相组成,b*值显著降低,呈现淡黄色。Zn~(2+)掺杂可减小颜料晶粒粒径和提高分散性,而La~(3+)掺杂晶粒以片状结构为主,团聚现象明显。
Doped Bi_(0.9)M_(0.1)VO_4(M=Zn,Y,La,Sm)yellow pigments were prepared by aqueous coprecipitation method.The influence of different metal ions doping on the phase structure,color performance and morphology of prepared BiVO_4-based pigments was investigated by means of colorimetric spectrophotometer,X-ray diffraction(XRD),scanning electron microscopy(SEM),ultraviolet/visible light reflectance spectroscopy and infrared spectroscopy analyses.Results show that the Zn~(2+)doped sample has the same monoclinic scheelite structure as the pure BiVO_4 pigment.The yellow hue(b*)and chroma(C*)of the sample were increased obviously with the doping of 10 mol%Zn~(2+).The obtained pigment shows bright greenish yellow.The La~(3+)doped sample is mainly composed of monoclinic crystalline phase with minor tetragonal phase,and shows a hazy yellow with reduced b*value.With Y~(3+)and Sm~(3+)doping,the phase structure is completely changed to be tetragonal,which leads to faint yellow.The Zn~(2+)doping can reduce the grain size and improve the dispersity of pigment powder,while the La~(3+)doped sample mostly consists of plate particles with serious aggregation.
Doped Bi_(0.9)M_(0.1)VO_4(M=Zn,Y,La,Sm)yellow pigments were prepared by aqueous coprecipitation method.The influence of different metal ions doping on the phase structure,color performance and morphology of prepared BiVO_4-based pigments was investigated by means of colorimetric spectrophotometer,X-ray diffraction(XRD),scanning electron microscopy(SEM),ultraviolet/visible light reflectance spectroscopy and infrared spectroscopy analyses.Results show that the Zn~(2+)doped sample has the same monoclinic scheelite structure as the pure BiVO_4 pigment.The yellow hue(b*)and chroma(C*)of the sample were increased obviously with the doping of 10 mol%Zn~(2+).The obtained pigment shows bright greenish yellow.The La~(3+)doped sample is mainly composed of monoclinic crystalline phase with minor tetragonal phase,and shows a hazy yellow with reduced b*value.With Y~(3+)and Sm~(3+)doping,the phase structure is completely changed to be tetragonal,which leads to faint yellow.The Zn~(2+)doping can reduce the grain size and improve the dispersity of pigment powder,while the La~(3+)doped sample mostly consists of plate particles with serious aggregation.
引文
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[15]KUMARI L S,GAYATHRI T H,SAMEERA S F.Y-doped Bi2MoO6 yellow pigments for the coloration of plastics[J].JAm Ceram Soc,2011,94(2):320-323.
[2]S AMEERA S F,RAO P P,VINEETHA J,et al.Influence of(LiLa)1/2MoO4 substitution on the pigmentary properties of BiVO4[J].Dyes and Pigments,2014,104:41-47.
[3]VAN DER LINDEN E G,MALTA L F B,MEDEIROS M E.Evaluation of synthetic routes to pigmentary grade bismuth vanadate[J].Dyes and Pigments,2011,90:36-40.
[4]TOKUNAGA S,KATO H,KUDO A.Selective preparation of monoclinic and tetragonal BiVO4 with scheelite structure and their photocatalytic properties[J].Chem Mater,2001,13:4624-4628.
[5]KUMARI L S,RAO P P,RADHAKRISHNAN A N P,et al.Brilliant yellow color and enhanced NIR reflectance of monoclinic BiVO4 through distortion in VO43-tetrahedra[J].Solar Energy Materials&Solar Cells,2013,112(3):134-43.
[6]WENDUSU W,IKAWA K,MASUI T,et al.Novel environment-friendly yellow pigments based on(Bi,La)VO4[J].Chem Lett,2011,40:792-794.
[7]SAITHATHUL F S,PRABHAKAR R P,JAMES V,et al.Probing structural variation and multifunctionality in niobium doped bismuth vanadate materials[J].Dalton Trans,2014,43(42):15851-15860.
[8]SAMEERA S F,RAO P P,KUMARI L S,et al.Potential NIRreflecting yellow pigments in(BiV)1-x(YNb)xO4 solid solutions[J].Chem Lett,2013,42(5):521-523.
[9]KUDO A,OMOYI 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].J Am Chem Soc,1999,121:11459-11467.
[10]YU J,KUDO A.Hydrothermal synthesis of nanofibrous bismuth vanadate[J].Chem Lett,2005,34(6):850-851.
[11]LIU J,WANG H,WANG S,et al.Hydrothermal preparation of BiVO4 powders[J].Mater Sci Eng B,2003,104(1-2):36-39.
[12]LU W,Yu J,ZHANG Y,et al.Synthesis and photocatalytic properties of BiVO4 by a citric acid complexation process[J].Rare Metals,2011,30(1):203-207
[13]LIN Z,WANG W,LIU S,et al.A sonochemical route to visible-light-driven high-activity BiVO4 photocatalyst[J].JMol Catal A-Chem,2006,252(1):120-124.
[14]GALEMBECK A,ALVES O L.BiVO4 thin film preparation by metal organic decomposition[J].Thin Solid Films,2000,365(1):90-93.
[15]KUMARI L S,GAYATHRI T H,SAMEERA S F.Y-doped Bi2MoO6 yellow pigments for the coloration of plastics[J].JAm Ceram Soc,2011,94(2):320-323.
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