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以太酸四丁酯为初始钛源、甲硫氨酸为掺杂剂,采用两步法制备了硫(S)和氮(N)元素耦合掺杂二氧化钛(Ti O2)柱撑蒙脱石(MMT)光催化剂.通过X射线光电子能谱(XPS)、漫反射光谱及比表面积和孔结构分析对光催化剂进行了表征,并通过甲醛气体降解实验对催化剂的光催化效率进行了评价,可见光照射300 min,甲醛气体的降解率接近85%.由此认为光催化剂的高催化活性是硫和氮元素耦合掺杂、大的比表面积、细小均匀的微孔结构以及催化剂的量子尺寸效应协同作用的结果.
Tetrabutyl ether was used as the initial titanium source and methionine as the dopant. Two-step synthesis of sulfur (S) and nitrogen (N) element doped titania (Ti O2) pillared montmorillonite ) Photocatalyst.The photocatalyst was characterized by X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy, specific surface area and pore structure analysis, and the photocatalytic efficiency of the catalyst was evaluated by formaldehyde gas degradation experiment. The visible light irradiation 300 min, the degradation rate of formaldehyde gas is close to 85% .Thus it is considered that the high catalytic activity of photocatalyst is the result of the synergistic effect of coupling coupling of sulfur and nitrogen, large specific surface area, fine uniform microporous structure and quantum size effect of catalyst .