水热反应条件对钨酸铋结构及光催化性能影响  

Effect of hydrothermal reaction conditions on the structure and photocatalytic performance of bismuth tungstate

作　　者：刘婷婷 闫梦鸽[1] 曹利兵 杨帆宇 LIU Tingting;YAN Mengge;CAO Libing;YANG Fanyu(School of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,China;School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安工程大学环境与化学工程学院,西安710048 [2]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《功能材料》2025年第2期2143-2150,共8页Journal of Functional Materials

基　　金：中国博士后科学基金项目(2023MD734204);陕西省高校科协青年人才托举计划项目(20210424);陕西省重点产业创新链(群)项目(2022ZDLSF06-05);陕西省教育厅自然科学专项科研计划项目(23JK0458);西安市碑林区科技计划项目(GX2208);西北水资源与环境生态教育部重点实验室开放基金项目(2022SZY02)。

摘　　要：通过改变水热反应条件调控钨酸铋(Bi_(2)WO_(6))的形貌结构、晶相结构、比表面积及孔径分布和光电性能,探究水热反应过程对Bi_(2)WO_(6)结构和性能调控机理。结果表明,水热反应温度升高加速前驱液中离子扩散速率和Bi_(2)WO_(6)晶体生长速度,有利于Bi_(2)WO_(6)纳米片自组装和晶体发育,但水热反应温度过高将导致自组装和奥斯特熟化过程过快从而破坏Bi_(2)WO_(6)三维纳米结构,进而导致比表面积和光电性能下降。水热反应时间主要影响Bi_(2)WO_(6)结晶过程,过长的水热反应时间会导致晶体重结晶和团聚,造成光电性能下降。Bi_(2)WO_(6)的优化制备条件为水热反应温度160℃、水热反应时间6 h,该条件下制备的Bi_(2)WO_(6)是正交相的三维纳米花球,具有介孔结构,比表面积达56.95 m^(2)/g,带隙能为2.77 eV,光电性能最佳,对氟伐他汀去除率达69.84%。In this study,the mechanism of the hydrothermal reaction process on the regulation of the structure and photocatalytic performance of bismuth tungstate(Bi_(2)WO_(6))by changing the hydrothermal reaction conditions to modulate the morphological structure crystal phase structure,specific surface area and pore size distribution,and optoelectronic properties of Bi_(2)WO_(6)was investigated.The results showed that the ion diffusion rate in the precursor solution and the growth rate of Bi_(2)WO_(6)crystals were accelerated with the increase of the hydrothermal reaction temperature,which is favorable for the self-assembly and crystal development of Bi_(2)WO_(6)nanosheets.But the three-dimensional nanostructures of Bi_(2)WO_(6)was destroyed due to the rapid process of self-assembly and Oster ripening in high temperature,which led to the decrease in the specific surface area and photoelectronic properties.The crystallization process of Bi_(2)WO_(6)was affected by hydrothermal reaction time.The recrystallization and agglomeration of crystals were observed because of long hydrothermal reaction time,which led to deterioration of photoelectric properties.The optimized conditions for the preparation of Bi_(2)WO_(6)were hydrothermal reaction temperature of 160℃and hydrothermal reaction time of 6 h.Bi_(2)WO_(6)prepared under optimized conditions showed an orthorhombic-phase three-dimensional nano-flower sphere with mesoporous structure,with specific surface area of 56.95 m^(2)/g and band gap energy of 2.77 eV,which showed the best photocatalytic performance to remove the 69.84%of fluvastatin.

关 键 词：钨酸铋 优化制备 水热法 光催化 氟伐他汀 

分 类 号：X52[环境科学与工程—环境工程]