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在不使用有机模板剂的条件下,以工业硫酸钛溶液为原料合成了高热稳定的锐钛矿型介孔TiO_2-SO_4~(2-).用X射线衍射、N2吸附、扫描电镜、X射线能谱、傅里叶变换红外光谱和紫外-可见光谱对样品进行了表征,并考察了其光催化性能.结果表明,硫酸根在焙烧过程中与前驱体介孔偏钛酸孔壁上自由羟基的键合起到了孔结构导向及支撑作用,500℃焙烧后样品仍具有202.2m2/g的比表面积及2.8nm的平均孔径.焙烧产物TiO_2-SO_4~(2-)中S=O的强电子诱导效应不仅使邻近的Ti成为超强酸中心,还使二氧化钛的吸收光谱产生30nm的红移,光催化活性显著提高.
Anatase-type mesoporous TiO_2-SO_4 ~ (2-) with high thermal stability was synthesized by using industrial titanium sulfate solution without X-ray diffraction, N2 adsorption, scanning electron microscopy, X-ray diffraction Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-Vis) were used to characterize the samples. The photocatalytic properties of the samples were also investigated. Of the bonded structure plays the role of pore structure orientation and support.After calcination at 500 ℃, the sample still has a specific surface area of 202.2m2 / g and an average pore diameter of 2.8nm.The strong electron of S = O in the calcined product TiO_2-SO_4 ~ (2-) The induction effect not only makes the adjacent Ti into a superacid center, but also causes the absorption spectrum of titanium dioxide to generate a red shift of 30 nm, thereby remarkably improving the photocatalytic activity.