多层级花状铁掺杂BiVO4的水热法制备与光催化性能.pdfVIP

Trans. Nonferrous Met. Soc. China 27(2017) 868−875 Hydrothermal synthesis and enhanced photocatalytic activity of hierarchical flower-like Fe-doped BiVO4 Hai-bin LI, Jian ZHANG, Guo-you HUANG, Sheng-hao FU, Chao MA, Bai-yu WANG, Qian-ru HUANG, Hong-wei LIAO School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China Received 11 April 2016; accepted 15 December 2016 Abstract: Fe-doped BiVO with hierarchical flower-like structure was prepared via a hydrothermal method using sodium dodecyl 4 benzene sulfonate (SDBS) as structure directing agent. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), high resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS) and UV-Vis were applied for characterization of the as-prepared samples. The formation mechanism of flower-like structure was proposed based on the evolution of morphology as a function of hydrothermal time. Fe-doped into substitutional sites of BiVO4 effectively improved the migration and separation of photogenerated carrier and enhanced the utilization of visible light. Flower-like Fe-doped BiVO4 showed much higher visible-light-driven photocatalytic efficiency for degradation of methyl blue compared with the pristine BiVO . And the sample with a Fe/Bi mole ratio of 2.5% showed the highest photocatalytic efficiency. 4 Key words: BiVO ; hydrothermal method; Fe doping; photocatalysis 4