科研之友
微信
新浪微博
Facebook
分享链接
摘要
Ultraviolet irradiation (lambda = 248 nm) was used to photocatalyze a solution of the heteroleptic titanium alkoxide (OPY)(2)Ti(TAP)(2) [where OPy = pyridine carbinoxide and TAP = 2,4,6 tris(dimethylamino)phenoxide], leading to the deposition of a titania-based thin film only in the exposed region. The effect of water addition to the (OPY)(2)Ti(TAP)(2) pyridine solution on the properties of the final photodeposited film structure was examined by using vibrational spectroscopy and electron microscopy. Under consistent optical exposure conditions, the amount of water added altered the nanoscale porosity of the final material produced. Films deposited from a solution with a 1:1 H(2)O/Ti content exhibited surface pores similar to 100 nm in diameter, whereas a 4:1 ratio yielded 10-nm pores, and material produced from a 8:1 solution appeared fully condensed. In addition, the effect of postdeposition thermal treatments on the nanostructure and chemistry of the photodeposited films was examined.
- 出版日期2009-11
