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首页> 外文期刊>International Journal of Electrochemical Science >Selective Synthesis of Monoclinic Bismuth Vanadate Powders by Surfactant-Assisted Co-Precipitation Method: Study of Their Electrochemical and Photocatalytic Properties
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Selective Synthesis of Monoclinic Bismuth Vanadate Powders by Surfactant-Assisted Co-Precipitation Method: Study of Their Electrochemical and Photocatalytic Properties

机译：表面活性剂辅助共沉淀法选择性合成钒酸铋单相粉末的电化学和光催化性能研究

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摘要

Monoclinic bismuth vanadate powders were selectively synthesized by surfactant-assistedco-precipitation method. The triblock copolymers EO19PO69EO19 (Pluronic P-123) andEO100PO65EO100 (Pluronic F-127) were utilized as morphology-directing templates. The as-synthesizedsamples were characterized by means of techniques such as X-ray powder diffraction (XRD), scanningelectron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis diffusereflectance spectroscopy (UV-vis DRS) and nitrogen adsorption-desorption isotherms (BET method).The quasi-Fermi potential of electrons of samples was determined through pH dependent photovoltagemeasurements. Moreover, the influence and effect of concentration of the surfactant on themorphology of the obtained materials were investigated. Experimental results indicate thatself-assembling balls of m-BiVO4 particles with an average size of 800 nm can be obtained at 200Cby using Pluronic P-123 in the co-precipitation process. The mechanism of formation of theas-prepared m-BiVO4 samples has also been proposed. Rhodamine B photodegradation was used toevaluate the photoactivity of the samples under visible-light irradiation.
机译：采用表面活性剂辅助共沉淀法选择性合成了单斜钒酸铋粉末。三嵌段共聚物EO19PO69EO19（Pluronic P-123）和EO100PO65EO100（Pluronic F-127）被用作形态学指导模板。合成后的样品通过X射线粉末衍射（XRD），扫描电子显微镜（SEM），傅立叶变换红外光谱（FT-IR），紫外可见漫反射光谱（UV-vis DRS）和氮气等技术进行表征吸附-解吸等温线（BET法）。通过pH依赖的光电压测量来确定样品电子的准费米电位。此外，研究了表面活性剂浓度对所得材料形态的影响和影响。实验结果表明，使用Pluronic P-123在共沉淀过程中，可以在200℃获得平均粒径为800 nm的m-BiVO4颗粒的自组装球。还提出了制备酶法制备的m-BiVO4样品的机理。罗丹明B光降解用于评估样品在可见光照射下的光活性。

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