A facile method for synthesis of polyaniline nanospheres and effect of doping on their electrical conductivity.
A facile method for synthesis of polyaniline nanospheres and effect of doping on their electrical conductivity.
复制标题
DOI：
10.1002/pi.3068
复制
发表时间：
2011-09
影响因子：
3.2
通讯作者：
Oki, Aderemi
中科院分区：
文献类型：
--
作者：
Neelgund, Gururaj M.;Oki, Aderemi
采用一种简单的无模板法合成了聚苯胺纳米球。苯胺在水介质中的聚合反应是在无质子酸的条件下，用过硫酸铵进行的。PANI纳米球的紫外-可见光谱在355 nm处出现了苯型环π-π* 跃迁的特征吸收峰。通过比较1582（醌型单元中的环伸缩）和1498 cm-1（苯型单元中的环伸缩）处的两个谱带，用FT-IR光谱法鉴定PANI纳米球的氧化态。X-射线衍射图谱表明PANI纳米球的低结晶性。聚苯胺纳米球的形貌为球形，平均粒径为3-12 nm。采用热重分析法研究了聚苯胺纳米微球的热行为。通过测量电流随暴露时间的变化，研究了HCl和H2SO 4掺杂对聚苯胺纳米球的影响。在100 ppm HCl的最佳掺杂状态下，PANI纳米球的电导率达到6×10−2 S cm−1。
The synthesis of polyaniline (PANI) nanospheres by a simple template-free method has been described. The polymerization of aniline in aqueous medium was accomplished using ammonium persulfate without any protonic acid. The UV-vis spectrum of PANI nanospheres displayed the characteristic absorption peak of π-π* transition of the benzenoid ring at 355 nm. The oxidation state of PANI nanospheres was identified with FT-IR spectroscopy by comparing the two bands at 1582 (ring stretching in quinoid unit) and 1498 cm−1 (ring stretching in bezenoid unit). The X-ray diffraction patterns demonstrated the low crystalline nature of PANI nanospheres. The morphology of PANI nanospheres was spherical and the mean diameter of nanospheres was found in the range of 3-12 nm. The thermal behavior of PANI nanospheres was studied by thermogravimetric analysis. The effect of doping of HCl and H2SO4 on PANI nanospheres was studied by measuring the current as a function of time of exposure. The high electrical conductivity of 6×10−2 S cm−1 was obtained for PANI nanospheres at their optimum doping state by 100 ppm HCl.
登录
查看更多内容
影响因子：
3.9
作者：
Anilkumar, P.;Jayakannan, M.
通讯作者：
Jayakannan, M.
DOI：
10.1016/j.colsurfa.2005.10.010
发表时间：
2006-03-15
影响因子：
5.2
作者：
Li, GJ;Yan, SF;Chen, YM
通讯作者：
Chen, YM
影响因子：
4.6
作者：
Li, XG;Zhou, HJ;Huang, MR
通讯作者：
Huang, MR
影响因子：
4.4
作者：
Park, SJ;Park, SY;Jhon, MS
通讯作者：
Jhon, MS
影响因子：
3.9
作者：
Riede, A;Helmstedt, M;Stejskal, J
通讯作者：
Stejskal, J