【摘要】 采用溶胶-凝胶法合成了TiO₂负载锶铁氧体光催化剂,通过XRD、TEM、UV-Vis、VSM等方法对催化剂结构进行了表征,并以高压汞灯为光源,亚甲基兰为目标降解物,对其光催化活性进行了研究.结果表明,TiO₂负载锶铁氧体为复合型光催化剂,负载后的复合光催化剂保持了良好的磁性能;锶铁氧体的负载拓宽了催化剂的光响应区域,光吸收带进入可见光区;在负载量为20%,催化剂用量1.5g/L条件下,催化降解亚甲基兰的效率可达99.1%.更多还原

【Abstract】 The photocatalyst of TiO2 loaded with strontium ferrite were synthesized via sol-gel technol- ogy and characterized by X-ray powder diffraction （XRD）,electron microscope （TEM）,UV-Vis diffused reflectance spectroscope （DRS） and vibrating sample magnetometer（VSM）.The photocatalytic activi- ties of the samples were evaluated by decolorization of methylene blue（MB） under UV irradiation.The results indicate that the TiO₂ loaded strontium ferrite photocatalyst is responsive to the visible light region according to DRS analysis.It is also found that the composite has good magnetic property. About 99.1% MB can be removed at the catalyst dosage of 1.5g/L under UV irradiation for 300 min, when the catalyst is loaded with 20% strontium ferrite.更多还原