A novel method for synthesis of polyaniline and its application for catalytic degradation of atrazine in a Fenton-like system.
A novel method for synthesis of polyaniline and its application for catalytic degradation of atrazine in a Fenton-like system.
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DOI：
10.1016/j.chemosphere.2018.01.050
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发表时间：
2018-04
期刊：
影响因子：
8.8
通讯作者：
Chao Wang;Zupei Guo;R. Hong;Juan Gao;Yong Guo;Cheng Gu
中科院分区：
文献类型：
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作者：
Chao Wang;Zupei Guo;R. Hong;Juan Gao;Yong Guo;Cheng Gu
近年来，聚苯胺（PANI）因其自由体积、透光率和电导率等性能受到广泛关注。本研究采用化学气相沉积法，以Fe(III)-饱和凹凸棒土（Fe(III)-ATTP）为催化剂，合成导电聚苯胺-粘土复合材料。该反应由苯胺（ANI）向Fe（III）的电子转移引发，随后生成ANI自由基阳离子。自由基可以在受约束的ATTP微孔结构中进一步聚合形成聚苯胺。通过拉曼光谱、傅里叶变换红外光谱和x射线光电子能谱与PANI标准物的对比，证实了Fe(III)-ATTP表面形成了PANI。新合成的Fe(III)-ATTP- pani复合材料在过氧化氢（H2O2）存在下对阿特拉津的有效耗散表明其具有优异的反应性，降解率比Fe(III)-ATTP提高了近150倍。Fe(III)-ATTP-PANI/ h2o2体系具有较高的反应活性，主要是由于加速了电子转移、亚铁离子的形成以及阿特拉津在凹凸棒石上的吸附增强。此外，我们的实验结果表明，Fe(III)- atp - pani具有良好的稳定性，并且可以重复使用几个反应周期，具有较高的反应活性。该材料可作为类芬顿反应体系的环保型催化剂，在有效去除多种持久性有机污染物方面具有广阔的应用前景。
Recently, polyaniline (PANI) has received widespread attention for the free volume, optical transmittance and electrical conductivity. In this study, a chemical vapor deposition method was developed to synthesize the conductive PANI-clay composite catalyzed by Fe(III)-saturated attapulgite (Fe(III)-ATTP). The reaction is initiated by the electron transfer from aniline (ANI) to Fe(III), subsequently generating ANI radical cation. The radical could further polymerize and form PANI in the constrained micropore structure of ATTP. The Raman, Fourier transform infrared and X-ray photoelectron spectra confirmed the formation of PANI on Fe(III)-ATTP surface by comparison with the PANI standard. The newly synthesized Fe(III)-ATTP-PANI composite exhibited superior reactivity as indicated by the efficient dissipation of atrazine in the presence of hydrogen peroxide (H2O2), and the degradation rate increased up to almost 150 times compared to Fe(III)-ATTP. The higher reactivity of Fe(III)-ATTP-PANI/H2O2system was attributed to the accelerated electron transfer, the formation of ferrous ions, and the enhanced adsorption of atrazine onto attapulgite. Furthermore, our experimental results demonstrated that Fe(III)-ATTP-PANI showed good stability and it could be reused for several reaction cycles with high reactivity. This new material could act as an environmental-friendly catalyst in Fenton-like reaction system and show promising potential to effectively eliminate many persistent organic contaminants.