摘要

二氧化鈦光觸媒具有光催化、無毒及化學穩定度高的特性，且是一種極為傑出的環保的光觸媒材料。

銀於文獻上的報載具有抑菌及殺菌的功能。本研究的目的在於使用銀修飾奈米二氧化鈦光觸媒，使其於可見光光譜有吸收峰。與其他文獻報載較不同處乃在於本研究利用Nd–YAG雷射為二氧化鈦光觸媒之激發源，並配合光降解實驗來探討銀修飾奈米二氧化鈦的結果。

由最後的結果得知以Nano Ag 2.0 wt % : TiO2 98.0 wt % 與 AgNO3 2.0 wt % : TiO2 98.0 wt % 之比例修飾奈米二氧化鈦光觸媒在可見光光譜區(380~780 nm)不僅有明顯的吸收峰，在光催化特性上亦明顯較未改質的奈米二氧化鈦光觸媒有較出色的表現。

Abstract

Titanium Dioxide photocatalyst has the characteristics of photo- catalysis, non toxicity and high stability of chemistry. It is also an outstanding photocatalyst material of environmental protection.

According to the literature, silver has the function of bacteriostasis and disinfection. Thus, the purpose of this study is to use silver to modify nanometer Titanium Dioxide photocatalyst and to make it reach a absorbing peak under visible light spectrum. This study is very different from the records of other literature because this study adopts Nd-YAG laser to be the energy of titanium dioxide photocatalyst and combine photodegradation experiment to investigate the result of nanometer Titanium Dioxide.

The results of the study showed that nanometer Titanium Dioxide photocatalyst, which is modified by the proportion of Nano Ag 2.0 wt % : TiO2 98.0 wt % and AgNO3 2.0 wt % : TiO2 98.0 wt %, has not only an obvious absorbing peak under visible light spectrum, but also a better result in photocatalysis compared with the original Titanium Dioxide photocatalyst.

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