TiO_(2)@PT光催化剂的构建及其光催化降解甲苯性能

Construction of TiO_(2)@PT photocatalyst and its study on photocatalytic degradation of toluene

以对苯二胺和对苯二甲醛为原料,在TiO_(2)表面原位缩合得到二氧化钛复合对苯二胺缩对苯二甲醛聚合物催化剂(TiO_(2)@PT),研究催化剂降解甲苯的光催化性能.利用扫描电子显微镜(SEM),比表面积测试(BET),红外光谱(FT-IR),光致发光光谱(PL),紫外吸收光谱(UV-Vis)以及瞬态光电流测试(TPC)表征手段确定了催化剂的结构形貌及光学特性.通过催化降解甲苯废气的活性测试,发现在365nm紫外光的照射下,TiO_(2)@PT复合材料对气相甲苯的降解效果良好.此外,研究了在不同聚合物包裹比例,催化剂用量,甲苯浓度,温度等条件下,TiO_(2)@PT对甲苯的降解效果,结果表明0.1g TiO_(2)@1%PT在100W紫外灯照射下对1000×10^(-6)甲苯的降解率最高,可以达到26.41%,对应的反应速率为1177.89µmol/(g·h).

TiO_(2)composite condensation of p-phenylenediamine and p-phenylenedialdehyde(TiO_(2)@PT)catalysts were prepared by in-situ condensation method,using p-phenylenediamine and p-phenylenedialdehyde as raw materials.The toluene photocatalytic degradation abilities of the catalysts were studied.The catalysts’morphologies and optical properties were characterized by scanning electron microscope(SEM),surface area analysis(BET),fourier transform infrared spectroscopy(FT-IR),photoluminescence spectroscopy(PL)and ultraviolet-visible spectroscopy(UV-Vis)and transient photocurrent(TPC).It was found that under 365nm ultraviolet irradiation,TiO_(2)@PT catalyst had a good degradation ratio on toluene.In addition,the toluene degradation capacities of TiO_(2)@PT with different polymer coating ratios were studied under various catalyst dosages,toluene concentrations,and reaction temperatures.The results showed that the highest degradation conversion was 26.41%,under 100W ultraviolet irradiation(365nm),0.1g TiO_(2)@1%PT dosage,1000×10^(-6)toluene concentration,corresponding to a reaction rate of 1177.89µmol/(g·h).