化学共沉淀法低温合成高显色BiVO_(4)黄色颜料  

Low-temperature Synthesis of High Rendering BiVO_(4)Yellow Pigment via Chemical Co-precipitation

作　　者：张筱君 李文 徐彦乔 吴倩 ZHANG Xiaojun;LI Wen;XU Yanqiao;WU Qian(National Engineering Research Center for Domestic&Building Ceramics,Jingdezhen 333001,Jiangxi,China;Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]国家日用及建筑陶瓷工程技术研究中心,江西景德镇333001 [2]景德镇陶瓷大学,江西景德镇333403

出　　处：《陶瓷学报》2022年第6期1059-1067,共9页Journal of Ceramics

基　　金：江西省自然科学基金(20202BABL214013);江西省教育厅基金(GJJ211343,GJJ211315,GJJ201345,GJJ190736);景德镇市科技计划项目(20212GYZD009-06)。

摘　　要：以五水硝酸铋[Bi(NO_(3))_(3)·5H_(2)O]和偏钒酸铵(NH_(4)VO_(3))分别为铋源和钒源,以去离子水为溶剂,在无任何模板剂的条件下,采用化学共沉淀法低温合成了钒酸铋黄色颜料。分别通过X射线衍射、拉曼和场发射扫描电子显微镜分析了颜料的晶体结构和显微形貌,同时采用CIE-L^(*)a^(*)b^(*)色度仪和UV-vis表征了该颜料的呈色性能。实验结果表明,该颜料为单斜白钨矿型钒酸铋(m-BiVO_(4)),呈碎块状形貌,粒径尺寸约为1.7μm。同时,采用化学共沉淀法能够实现BiVO_(4)颜料的低温合成,合成温度远低于传统固相法的700℃。当前驱体溶液浓度为0.05 mol·L^(-1),pH值为6时,制得颜料色度最佳,色度值L^(*)=76.66、a^(*)=0.22、b^(*)=76.12,优于目前商业钒酸铋黄色颜料的色度值。此外,将其应用于聚甲基丙烯酸甲酯(PMMA)中,颜料在基质中具有良好的呈色稳定性和分散性。BiVO_(4)yellow pigment was synthesized by using a template-free chemical co-precipitation method at low temperatures,with bismuth nitrate pentahydrate[Bi(NO_(3))_(3)·5H_(2)O]and ammonium metavanadate(NH_(4)VO_(3))as Bi and V resources and deionized water as solvent.Phase composition and morphological characteristics of the samples were studied by means of X-ray diffraction(XRD),Raman and field emission scanning electron microscope(SEM).CIE-L^(*)a^(*)b^(*)color system and UV-vis diffuse reflectance spectra were employed to characterize chromatic properties of the BiVO_(4)pigment.It is found that the resulting products have monoclinic scheelite-structure and irregular bulk-like morphology with an average particle size of 1.7μm.Meanwhile,the formation temperature is much lower than that of the conventional solid state method(700℃).When the concentration of precursor solution and pH value are 0.05 mol·L^(-1) and 6,the BiVO_(4)yellow pigment shows excellent chromatic performance,with L^(*)=76.66,a^(*)=0.22,b^(*)=76.12,which is much higher than that of the commercial BiVO_(4).Importantly,the as-prepared BiVO_(4)pigment is applied in polymethyl methacrylate(PMMA)and exhibits excellent color and dispersion properties in the matrix.

关 键 词：黄色颜料 钒酸铋 化学共沉淀法 低温合成 高显色 

分 类 号：TQ174.45[化学工程—陶瓷工业]