花状纳米金和球形纳米金的催化活性对比研究

基金项目:

湖南省教育厅科研课题(11C0136)

详细信息

A Comparison Study of the Catalytic Properties of Au-based Nanoflowers and Nanoparticles

摘要: 以花状纳米金(AuNFs)或球形纳米金(AuNPs)为催化剂,硼氢化钠为供氢体,在不同温度下以对硝基苯酚为模板发生还原反应。结果表明,该催化反应温度与时间呈负相关。50℃时,AuNFs所需反应时间为7min,37℃时所需时间为15 min,20℃时所需时间为45 min。该反应为准一级动力学反应。AuNFs的E_a值37.97 kJ/mol,比AuNPs的E_a值51.51 kJ/mol小,说明花状纳米金比球形纳米金具有更高的催化活性。
- 花状纳米金 /
- 球形纳米金 /
- 催化活性
Abstract: To explore the catalytic activity of gold nanoparticles in this paper is demostrated. With sodium borohydride as the hydrogen donor, the catalytic reaction based on the reduction of p-nitrophenol by synthesized AuNFs or AuNPs was carried out at the different temperature. The results show that the reaction temperature was negatively correlated with the time. At 50℃, the reaction time of AuNFs was 7 min; at 37℃, AuNFs was 15 min; at 20℃, AuNFs was 45 min. The reaction was first order kinetics. And the E_a value of AuNFs was 37. 97 kJ/mol, smaller than AuNPs' 51. 51 kJ/mol. The catalytic activity of AuNFs is stronger than that of AuNPs.
- gold nanoflowers /
- spherical gold nanoparticles /
- catalytic activity