光催化毕业.docVIP

摘要：窗体顶端 半导体光催化材料在太阳能利用和氧化降解污染物方面的广泛应用。作为光催化材料，TiO具有相对高的活性，稳定性和耐化学性。然而，只能响应占用很少光紫外线产生的电子 - 空穴的分离效率不高。为了解决这些问题，具有可见光响应的材料制成的新的光催化的开发势在必行。 BiOI作为一种新的光催化剂，由于其特殊的层状结构表现出相对优异的可见光有机污染物光催化降解性能。异质结构已被证明是一种电子 - 空穴的分离，从而能够显著提高光催化性能BiOI。Abstract：窗体顶端 窗体底端 Abstract：Semiconductor photocatalytic oxidation in the utilization of solar energy and Degradation of great application. As one of ordinary photocatalytic material advantages of TiO 2 having a relatively high activity, good stability and chemical resistance. However, it is only in response to ultraviolet light, which accounts for a small portion of sunlight. Besiedes, titanium dioxide electron - hole separation efficiency is quite slow. Because of these factors, the development of photocatalytic material who has the ability to respond to visible light is necessary. As one of the new photocatalysts, BiOI exhibit photocatalytic degradation of organic pollutants more superior performance. The reason for this is its high-performance special layered structure. Constructed heterostructure has proven to be quite useful way to separate photo-generated electrons - hole, to further improve the photocatalytic properties. In BiOIO3/BiOI heterostructure were fabricated by acetic acid,?potassium iodide,?potassium iodate,?bismuth nitrate as raw materials and BiOIO3 / BiOI is by chemical precipitation method. Different characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence spectra ((PL) and ns-level time-resolved fluorescence spectra, have been used to investigate the structure and properties of the as-prepared samples. The results show that?the heterogeneous structure of the?preparation?is a rather useful method to separate the photogenerated?electron hole?separation?method in NOx.The?heterostructure?has broad applicat