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以硝酸银、四氯化钛及活性炭为原料,采用溶胶-凝胶法和浸渍法制备了3种复合光催化剂。通过TEM、XRD、BET和UV-Vis光谱对复合光催化剂的形貌、物相组成、比表面积和吸光性能进行了表征,并以甲基橙的脱色降解为模型反应,考察了样品的光催化性能。结果表明:其光催化活性大小顺序为Ag/Ti O2/AC>Ag/Ti O2>Ti O2,其中,Ag/Ti O2/AC由于具有895.21 m2/g的比表面积和Ag的负载改性而具有吸附、光催化双效功能,且对光的吸收扩展到可见光区,对甲基橙的最大降解率能达到95.2%。催化剂连续重复使用5次,Ag/Ti O2/AC对甲基橙溶液的脱色降解率均保持在90%以上。
Using silver nitrate, titanium tetrachloride and activated carbon as raw materials, three kinds of composite photocatalysts were prepared by sol-gel method and impregnation method. The morphology, phase composition, specific surface area and absorbance of the composite photocatalysts were characterized by TEM, XRD, BET and UV-Vis spectra. The decolorization and degradation of methyl orange were used as model reactions. The photocatalytic activity performance. The results show that the order of photocatalytic activity is Ag / Ti O2 / AC> Ag / Ti O2> Ti O2, where Ag / Ti O2 / AC has the following specific surface area of 895.21 m2 / g and load modification of Ag Adsorption, photocatalytic double-effect function, and the absorption of light extended to the visible region, the maximum degradation rate of methyl orange can reach 95.2%. The catalyst was continuously and repeatedly used 5 times, and the decolorization degradation rate of methyl orange solution by Ag / Ti O2 / AC was above 90%.