银粒子浓度、粒度对催化硝基化合物的影响

Effect of Concentration and Particle-Size of Silver Nanoparticles on the Catalytic Nitro-Compound

采用银纳米粒子作催化剂,研究其对催化硝基化合物反应速率的影响,结果表明,纳米银粒子在室温下可极大地加速对硝基化合物的还原过程,带正电荷的硝基化合物比带负电荷的硝基化合物具有更高的催化反应速率;催化剂银粒子越多,反应速率越大,但因受纳米粒子本身性质的制约,数量不能无限大;催化剂银粒子粒度越小,反应速率越大。

Ag nanoparticles were employed as catalyst and their effect on the reaction rate of the nitro-compound were investigated.Results show that Ag nanoparticles can greatly accelerate the reduction of nitro-compound at room temperature,and the nitro-compound with positive charges has higher catalytic reaction rate than that with negative charges.More Ag nanoparticles lead to higher reaction rate;however,the amount should be limited due to the properties of the nanoparticles.The bigger the Ag nanoparticle size is,the higher the reaction rate is.