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首页> 外文期刊>RSC Advances >Polyaniline–single walled carbon nanotube composite – a photocatalyst to degrade rose bengal and methyl orange dyes under visible-light illumination
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Polyaniline–single walled carbon nanotube composite – a photocatalyst to degrade rose bengal and methyl orange dyes under visible-light illumination

机译：聚苯胺-单壁碳纳米管复合材料-在可见光下降解玫瑰红和甲基橙染料的光催化剂

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The polyaniline/single walled carbon nanotube (PANI–SWCNT) composites were prepared by the polymerization of an aniline monomer in the presence of sulfosalicylic acid with SWCNT under in situ conditions. PANI and PANI–SWCNT composites were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultra violet-visible spectroscopy (UV-Vis), Fourier transform infra-red spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL) and Brunauer–Emmett–Teller (BET) analysis. The application of the composites as a recyclable photocatalysts with visible-light-driven photocatalytic activity and photostability for the degradation of organic dyes – Rose Bengal (RB) and Methyl Orange (MO) – is demonstrated. PANI–SWCNT composite, with 2 weight% SWCNT content, has emerged as the best with degradation efficiencies of 95.91% and 90.34% against the performance of PANI with degradation efficiencies of 85.2% and 75.9% for RB and MO within 10 and 30 minutes, respectively. The synergistic effect between PANI and SWCNT is found to impart improved photogenerated carrier separation in the composite. A possible photocatalytic mechanism on the enhancement of the visible light performance of the composite over pure PANI is discussed based on the results of an active species trapping experiment.
机译：聚苯胺/单壁碳纳米管（PANI-SWCNT）复合材料是在磺基水杨酸存在下，在原位条件下，通过苯胺单体在磺基水杨酸与SWCNT的作用下聚合而成的。 PANI和PANI-SWCNT复合材料的特征在于X射线衍射（XRD），场发射扫描电子显微镜（FESEM），紫外可见光谱（UV-Vis），傅立叶变换红外光谱（FTIR），X射线光电子能谱（XPS），光致发光光谱（PL）和Brunauer–Emmett–Teller（BET）分析。证明了该复合材料作为具有可见光驱动的光催化活性和光稳定性的可回收光催化剂在降解玫瑰红（RB）和甲基橙（MO）等有机染料中的应用。具有2 wt％SWCNT含量的PANI–SWCNT复合材料以95.91％和90.34％的降解效率相对于PANI表现最佳，在10和30分钟内，其对RB和MO的降解效率分别为85.2％和75.9％，分别。发现PANI和SWCNT之间的协同作用可改善复合材料中光生载流子的分离。基于活性物种捕获实验的结果，讨论了可能的光催化机制，以提高复合材料在纯PANI上的可见光性能。

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