摘要
以TiCl4、Al2（SO4）3为原料，控制n（Al2O3）／n（TiO2）=0．2，采用液相共沉淀法制备了Al2O3／TiO2纳米抗菌剂，并用DSC—TG、XRD、UV—vis等手段研究了Al2O3复合对TiO2抗菌性能的影响。结果表明，复合Al2O3后，TiO2纳米抗菌剂经900℃煅烧后完全是锐钛矿结构；950—1050oC为良好的混晶结构，其中，经950℃煅烧后，混晶结构中锐钛矿相质量分数约占77％，平均粒径约20nm，可见光吸收带边红移显著，光吸收阈值由纯TiO2的380nm红移至430nm左右，抗菌性能好，在荧光灯下对大肠杆菌和金黄色葡萄球菌的抑菌圈直径达15mm左右。
Al2O3/TiO2 nanometer antimierobic with n （Al2O3）/n （ TiO2 ） = 0. 2 was prepared by coprecipitation method using TiC14 and Al2 （SO4 ）3 as raw materials. The effect of composite agent Al2O3 on antimicrobial properties of nanometer TiO2 was studied using DSC - TG, XRD and UV - vis. The results show that nanometer TiO2 compounded by Al2O3 calcined at 900 ℃ has entirely the anatase structure,and that calcined at 950 -1050 ℃ has well mixed crystalline structure. TiO2 nanocomposite calcined at 950 ℃ is well mixed crystalline structure in which the mass fraction of anatase is about 77 %, the average particle size is about 20 nm, and the red shift of absorption band is remarkable, i. e. optical absorption edge extended from 380 nm of pure TiO2 （ calcined at 700 ℃） to 430 nm, and the antibacterial circle reaches about 15 mm under fluorescent lamp against colibacillus and staphylococcus.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2006年第12期1178-1180,1185,共4页
Fine Chemicals
