离子液体辅助水热法制备BiVO_(4)黄色色料及色度研究  

Synthesis and Chromatic Properties of BiVO4 Pigment via Ionic Liquid Assisted Hydrothermal Method

作　　者：谢志翔 彭溢源 刘汉语 朱嗣承 陈婷 XIE Zhixiang;PENG Yiyuan;LIU Hanyu;ZHU Sicheng;CHEN Ting(School of Chemistry and Life,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China;Institute of Materials Science&Devices,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]苏州科技大学化学与生命科学学院,江苏苏州215009 [2]苏州科技大学材料科学与器件研究院,江苏苏州215009

出　　处：《材料导报》2025年第7期61-65,共5页Materials Reports

基　　金：国家自然科学基金(52062019;22001187);江苏省高等学校基础科学(自然科学)研究重大项目(24KJA430013)。

摘　　要：本工作以硝酸铋(Bi(NO_(3))_(3)·5H2O)和偏钒酸铵(NH4VO_(3))为主要原料,并采用离子液体1-丁基-3-甲基咪唑溴盐([Bmim]Br)为溶剂,通过离子液体辅助水热法合成了BiVO_(4)黄色色料。利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)研究了前驱体pH值、水热反应温度和时间对BiVO_(4)合成及显微形貌的影响,同时采用CIE-L^(*)a^(*)b^(*)色度仪考察了该色料的色度值。实验结果表明:前驱体溶液pH值对BiVO_(4)色料的合成及形貌有着重要的影响。不同的pH值条件下,反应体系的离子平衡会有所不同,从而影响BiVO_(4)色料的结构和性能。随着pH值从5增大至8,合成产物由片状向柱状转变。当pH=6时,可以合成片状单斜白钨矿型BiVO_(4)黄色色料,平均粒径约4μm。采用水热法能够实现BiVO_(4)色料的低温合成,合成温度由传统固相法的650℃降至160℃。随着水热反应温度由160℃升至200℃,BiVO_(4)色料粒径由4μm增加至10μm,团聚现象加重。延长水热反应时间有助于BiVO_(4)晶体的成核与生长,经160℃水热反应2 h后,制得的BiVO_(4)色料呈色性能最佳,色度值L^(*)=76.77,a^(*)=2.80,b^(*)=64.59。BiVO_(4) yellow pigment was synthesized by ionic liquid(1-butyl-3-methylimidazolium tetrafluoroborate,[Bmim]BF4)assisted hydrothermal method using bismuth nitrate(Bi(NO_(3))_(3)·5H_(2)O)and ammonium metavanadate(NH4VO_(3))as raw materials.The effects of the pH value of precursor,hydrothermal temperature and reaction time on the synthesis and morphology of samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),while the chromatic value of the BiVO_(4) pigments was characterized by CIE-L^(*)a^(*)b^(*)color system.The experimental results show that the pH value of precursor has a strong influence on the synthesis and morphology of BiVO_(4) pigments.It can change the ionic balance of precursor,consequently affecting the final structure and properties of BiVO_(4) pigments.As the pH value increases from 5 to 8,the morphology of BiVO_(4) pigment change from sheet-shaped to club-shaped.When pH value is 6,BiVO_(4) pigment with the monoclinic scheelite-structure exhibits sheet-like morphology and particle size is about 4μm.The BiVO_(4) pigment can be synthesized via hydrothermal method at low-temperature.Compared with the conventional solid state method,its synthesis temperature is decreased from 650℃to 160℃.Increase of hydrothermal temperature from 160℃to 200℃results in the increase of the size of samples from 4μm to 10μm and serious aggregation.It is found that longer reaction time is beneficial for BiVO_(4) crystal to nucleate and grow.After hydrothermal reaction at 160℃for 2 h,the as-prepared BiVO_(4) pigment exhibits excellent chromatic value,as L^(*)=76.77,a^(*)=2.80,b^(*)=64.59.

关 键 词：色料 钒酸铋 离子液体 水热法 低温合成 

分 类 号：TB32[一般工业技术—材料科学与工程]