Date:

2025-04-30

Title of Paper:

UV-Catalytic Preparation of Polypyrrole Nanoparticles Induced by H2O2

Journal:

JOURNAL OF PHYSICAL CHEMISTRY C

Summary:

As a green oxidant, H2O, can be used to induce the polymerization of pyrrole. This approach avoids the issue of metal residue in the polymer caused by metal oxidants, whereas the reaction efficiency is low and the corresponding reaction mechanism not clear. In this study, uniform polypyrrole (PPy) nanopartides were prepared using H2O2 as an oxidant under UV irradiation in the presence of polyvinylpyrrolidone (PVP). The morphology characterization indicated that the spherical PPy nanopartides were capped by a PVP shell. Through the investigation of reaction process, it was found that the photolysis of H2O2 led to the formation of hydroxyl radicals, which then initiated the oxidative polymerization of pyrrole. The coalescence of small PPy particles formed nanopartides which were stabilized by PVP. The effects of several reaction conditions on the polymerization rate and the size distribution of nanoparticles were investigated in detail, including radiation intensity (0-30 W), temperature (0-50 degrees C), and the concentrations of PVP (5-20 g/L), H2O2 (0.06-0.6 M), H2SO4 (0-0.22 M), and the monomer pyrrole (0.03-0.2 M), respectively. UV-catalytic preparation of PPy nanopartides induced by H2O2 is an effective and environmentally friendly approach, which could be expected to be extended to other conductive polymers.

Co-author:

Zhang, Shihu; Zhu, Kaiming; Lv, Guowei; Wang, Guolong; Yu, Demei; Shao, Jinyou

Translation or Not:

No

Date of Publication:

2015-08-13