期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 115, 期 1, 页码 259-266出版社
SPRINGER
DOI: 10.1007/s10973-013-3242-9
关键词
PANI/La2O3 composite; PANI/Sm2O3 composite; Thermal stability; TG-DTG; Electrochemical performance
资金
- National Natural Science Foundation of China [20903017]
- Science and Technology Foundation of Dalian [2010J21DW010]
- China Environmental Protection Foundation [CEPF2010-123-2-17]
Polyaniline/rare earth oxide composites (PANI/La2O3 and PANI/Sm2O3) were synthesized by in situ polymerization at the presence of sulfosalicylic acid (as dopant). The composites obtained were characterized by Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The thermal stability of the composites was investigated by thermogravimetry (TG) and derivative thermogravimetry (DTG). The electrochemical performance of the composites was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results of FTIR, XRD, SEM, CV, and EIS show that the structure of composite has changed greatly when rare earth oxide content is > 0.7 g (PANI/La2O3[w/w(92.7/7.3)] and PANI/Sm2O3[w/w(96.2/3.8)]) and the PANI in the composite has transformed into pernigraniline base (non-conducting state) from emeraldine base (conducting state). TG-DTG analysis indicates that the thermal stability of composite was higher than pure PANI, which is attributed to the interaction between PANI and rare earth oxide.
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