Sonochemical preparation of photocatalyst supporting core-shellstructured nanoparticles and the analysis on their catalytic mechanism

采用独特的声化学还原方法，成功地将金、钯双金属纳米颗粒固定在二氧化钛表面。光催化活性取决于固定的双金属颗粒的内部结构，即每个颗粒中组成金属的分布，即使具有相同的成分。发现将两种或两种以上金属合金化并设计其内部结构可以为组成金属提供优越的催化剂。

Bimetallic nanoparticles consisting of gold and palladium were successfully immobilized on titanium dioxide surface by unique sonochemical reduction method. The photocatalytic activities depended on the inner structure of the immobilized bimetallic particles, in other words, the distribution of the constituent metals in each particle, even with same components. Alloying two or more metals and designing their inner structure were found to provide superior catalyst to the constituent metals.