【摘要】：采用溶膠-凝膠法,以鈦酸四丁酯為前驅(qū)體,羧基化多壁碳納米管(oCNTs)為載體,乙醇為溶劑,冰醋酸為抑制劑,成功制備了TiO_2納米粒子負(fù)載碳納米管的復(fù)合光催化劑(TiO_2/o CNTs).通過XRD、TEM、UV等測(cè)試手段對(duì)復(fù)合材料進(jìn)行了表征.結(jié)果表明:經(jīng)450℃煅燒3 h后制備的TiO_2/o CNTs復(fù)合體系中,納米TiO_2呈現(xiàn)銳鈦礦且均勻包覆在碳納米管表面.o CNTs的存在能夠有效改變復(fù)合材料的表面性質(zhì),以實(shí)現(xiàn)TiO_2對(duì)紫外光的敏感性.當(dāng)TiO_2和o CNTs的質(zhì)量比為1∶0.03、TiO_2/3%o CNTs催化劑使用量為0.8 g/L時(shí),對(duì)20 mg/L甲基橙溶液紫外燈照射1 h,甲基橙溶液的降解率達(dá)到99%,而同等條件下純TiO_2對(duì)甲基橙的降解率不到50%,說明o CNTs能夠有效提高TiO_2對(duì)甲基橙的光催化活性.TiO_2/3%o CNTs光催化劑對(duì)甲基橙進(jìn)行5次循環(huán)降解,降解率保持在95%左右.
[Abstract]:Using tetrabutyl titanate as precursor, carboxylated multiwalled carbon nanotubes (oCNTs) as support, ethanol as solvent and acetic acid as inhibitor, the composite photocatalyst (TiO_2/o CNTs).) supported on TiO_2 nanoparticles was successfully prepared by sol-gel method. The composites were characterized by XRD,TEM,UV. The results show that in the TiO_2/o CNTs composite system calcined at 450 鈩，

本文編號(hào)：2253240