Novel PEI-AuNPs-(MnPPIX)-P-III nanocomposite with enhanced peroxidase-like catalytic activity in aqueous media

作者：Xie, Huifang^*; Gu, Shumei; Zhang, Jingyi; Hu, Qiong; Yu, Xuehua; Kong, Jinming^*

来源：Comptes Rendus Chimie, 2018, 21(2): 104-111.

DOI：10.1016/j.crci.2017.11.010

• Peroxidase-like activity
• Mn porphyrin
• Gold nanoparticles
• Polyethyleneimine
• Activation of H2O2

Mn porphyrin provides a possibility to constitute the novel mimic catalyst with peroxidase-like activity. A simple method for preparing a novel catalyst PEI-AuNPs-Mn-III PPIX, used in aqueous media, was presented in this paper. The covalent anchoring of (MnPPIX)-P-III and PEI were verified, meanwhile gold nanoparticles with the diameter less than 10 nm were dispersed uniformly and stably. The remarkable peroxidase-like catalytic activity of PEI-AuNPs-(MnPPIX)-P-III was displayed in the oxidative degradation of azo dye acid orange 7 (AO7) as the model reaction in the presence of trace of H2O2. The synergistic effects of PEI-AuNPs and MnIIIPPIX on the enhancement of catalytic activity were observed at pH 2.0. Possible pathways involving in the formation of active radicals are proposed. The construction of PEI-AuNPs-(MnPPIX)-P-III nanocomposite offers a new insight into the application of Mn porphyrin upon activation of H2O2, which have potential applications in many fields.

• 出版日期2018-2
• 单位南京理工大学