期刊
MACROMOLECULES
卷 44, 期 12, 页码 4610-4615出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma2006359
关键词
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资金
- National Natural Science Foundation of China [50973098]
- New Zealand Foundation for Science and Technology [UOAX0806]
- New Zealand Ministry of Business, Innovation & Employment (MBIE) [UOAX0806] Funding Source: New Zealand Ministry of Business, Innovation & Employment (MBIE)
An improved chemical one-step method (ICOSM) was used to prepare highly conductive and magnetic polypyrrole/gamma-Fe2O3 (PPy/gamma-Fe2O3) nanospheres similar to 80 nm in diameter. In the reaction process involved, FeCl3 acts as an oxidant for the polymerization of pyrrole and as a source of Fe-III for the formation of gamma-Fe2O3, which also requires the initial presence of Fe-II, provided by the addition of FeCl2. The method differs from the previous chemical one-step method (COSM) through the addition of p-toluenesulfonic acid (p-TSA) as the dopant after addition of the FeCl3 solution was finished. The conductive and magnetic properties of PPy/gamma-Fe2O3 nanospheres increased and reached maximum values simultaneously with increasing amounts of FeCl2, contrary to the result observed in the previous COSM. The resulting electromagnetic PPy/gamma-Fe2O3 nanospheres show maximum conductivity of 64.4 S/cm and saturation magnetization of 4.85 A m(2)/kg. The p-TSA dopant plays a critical role in the formation of PPy/gamma-Fe2O3 nanospheres.
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