以离子液体1‐丁基‐3‐甲基咪唑氯盐BMIMCl为反应介质，钛酸丁酯作为钛前驱物，采用溶胶‐凝胶法制备 TiO2，并将其负载在纤维素上，制备纤维素／T iO2复合材料。采用单因素实验对反应条件进行优化，用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FTIR）、紫外光漫反射（DRS）及热分析仪（TG）对复合材料结构及性能进行表征。以紫外光为光源，研究纤维素／T iO2复合材料对甲基橙水溶液的光催化降解性能。结果表明：采用离子液体BMIMCl作为反应介质，可在常温常压下制备出高活性的光催化复合材料；TiO2负载于纤维素后的复合材料对甲基橙的降解率在80min达到97．09％，与未负载的纳米TiO2光催化剂相比，复合材料对甲基橙的降解率提高了37％。纤维素／T iO2复合材料重复利用4次后对甲基橙的降解率仍能达到62．66％。
Cellulose/TiO2 composite was prepared by sol‐gel method using the ionic liquid BMIMCl as reactive medium and Ti(OBu)4 as a precursor .The synthesis conditions were optimized by single‐fac‐tor experiment .The structure and properties of the composite were characterized by scanning electron microscope (SEM ) ,X‐ray diffraction(XRD) ,Fourier transform infrared spectoscopy (FT‐IR) ,UV‐vis‐diffuse reflectance spectroscope(DRS) and thermogravimetric (TG) analysis .The photocatalytic ac‐tivity of the composite was investigated via testing the photodegradation of methyl orange in aqueous suspension under UV‐light .The results show that the high active photocatalytic composite is prepared by using ionic liquid BMIMCl as medium at room temperature and atmospheric pressure .The photo catalytic degradation rate of composite on methyl orange(MO) reaches 97 .09% in 80min .Comparing with bare TiO2 ,the degradation rate of MO increases by 37% .Moreover ,the composite still shows 62 .66% degradation rate towards MO after recycling 4 times .
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