从钛酸盐制备介孔锐钛/金红石型双晶TiO_2及其光催化性能  

Synthesis and characterization of mesoporous anatase/rutile TiO_2 from potassium titanate

作　　者：石康中[1] 杨祝红[1] 涂睿[1] 李东[1] 李力成[1] 朱育丹[1] 陆小华[1] 

机构地区：[1]南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2013年第1期30-35,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：973计划前期研究专项课题(2009CB226103);国家自然科学基金(20976080);教育部创新团队(IRT0732);中国博士后科学基金(20110491407)

摘　　要：以二钛酸钾(K2Ti2O5)经离子交换得到的二钛酸(H2Ti2O5.xH2O)为原料,与NH4Cl-HCl溶液在150℃进行水热反应,制备出介孔锐钛/金红石型双晶TiO2。通过X线衍射仪(XRD),场发射扫描电子显微镜(FE-SEM)、低温N2吸附-脱附以及紫外拉曼等对试样进行表征,并考察TiO2光催化剂降解甲基橙的活性及其稳定性。结果表明:金红石质量分数为22.6%时的介孔双晶TiO2的活性最高,是商业纳米TiO2(A91)的2.6倍,并与商用TiO2催化剂P25的活性相当。此外,介孔双晶TiO2经10次循环使用后,活性为新鲜催化剂的92%,其具备的微米尺寸形貌更容易回收再利用,具有潜在的工业应用价值。Mesoporous anatase/rutile TiO2 was drate （ H2 Ti2 O5· xH2 O） from potassium titanate solution at 15O ℃. The catalyst samples were scanning electron microscopy （FE-SEM）, N2 synthesized by hydrothermal treatment of titanic （K2Ti2Os ） via ion-exchange and NH4Cl-HCl in characterized by X-ray diffraction （XRD）, field adsorption-desorption measurements and Raman Results indicated that when the rutile content was 22. 6%, the mesoporous bicrystalline TiO2 and acid hyaqueous emission spectra. Degussa P25 showed similar degradation behavior toward methyl orange （ MO）, and was 2.6 times of commercial anatase（A91 ）. Furthermore, it was easily recycled, and maintained 92% of its initial activity after reused being 1O times, so it would be a potential catalyst for engineering application.

关 键 词：介孔TIO2 锐钛 金红石 光催化 稳定性 

分 类 号：O643[理学—物理化学]