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用ＥＳＲ方法研究了５种脂肪酰胺化合物在经金属银修饰后的二氧化钛微粒表面光诱导电子转移和有关光催化反应行为。结果发现经修饰过的与未修饰过的ＴｉＯ＿２粒子的光催化特性有极为明显的差别。当体系中无ＴｉＯ＿２存在时，只是甲酰胺有很微弱的反应，加合物（ＤＭＰＯ－ＣＯＮＨ＿２）的信号被检出，而其它４种酰胺均无ＥＳＲ信号。除碳中心自由基外，还有（ＤＭＰＯ－ＯＨ）信号被检出，相同条件下，采用Ａｇ－ＴｉＯ＿２时ＥＳＫ信号明显增强，银用量为１０％时比１％的更强。因此半导体ＴｉＯ＿２粒子表面进行银修饰后可显著提高光催化能力。
ESR method was used to study the photoinduced electron transfer and related photocatalytic activity of five kinds of fatty amide compounds on the surface of titania particles modified with metallic silver. The results showed that there was a very significant difference between the photocatalytic properties of modified and unmodified TiO 2 particles. When there was no TiO 2 in the system, only formamide had a weak reaction. The signal of adduct (DMPO-CONH_2) was detected, while the other four amides showed no ESR signal. In addition to the carbon centers free radicals, (DMPO-OH) signal was detected under the same conditions, the use of Ag-TiO 2 ESK signal was significantly enhanced when the amount of 10% silver is more than 1%. Therefore, the surface of the semiconductor TiO 2 silver modification can significantly improve the photocatalytic ability.