摘要
采用溶胶-凝胶技术,以钛酸丁酯[Ti(OC_4H_9)_4]为前驱体,加入聚乙二醇(polyethylene glycol,PEG)作为模板剂,在玻璃基片上制备了纳米氧化钛多孔薄膜。通过SEM观察了多孔薄膜的表面形貌,通过IR及XRD的测试分析表征了材料的结构,探讨了样品在溶胶-凝胶及烧结过程中的物理化学变化,测定了氧化钛的晶相成分。实验结果表明;通过调整H_2O/Ti(OC_4H_9)_4摩尔比及PEG的添加量可得到孔径范围在50～500 nm且孔径可调的多孔氧化钛纳米薄膜,此外成膜过程中的升温速率是决定薄膜孔结构优劣的一个重要因素。
Nanocrystalline titania porous films were prepared on glass substrates with Ti(OC4H9)4 as precursor and polyethylene glycol (PEG) as organic template by sol-gel process. The surface morphology of the films was observed by SEM. The chemical and physical changes which took place during sol-gel and heat treatment were analyzed by means of IR and XRD. Experimental results show that nanocrystalline titania porous films with the pore size in the range of 50-500 nm are available, and pore dimensions can be controlled through adjusting both n(H2O)/n[Ti(OC4H9)4] and the amount of PEG. It is also found that the heating rate in calcining is very critical to obtain a perfect porous structure.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第9期848-852,共5页
Journal of The Chinese Ceramic Society
关键词
纳米氧化钛
多孔薄膜
溶胶-凝胶法
聚乙二醇
Film preparation
Nanostructured materials
Sol
gels
Structure (composition)
