聚噻吩纳米颗粒包覆氧化石墨烯对硝基苯的吸附和去除表征

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-06-01 DOI:10.22036/PCR.2020.208780.1700

S. Mousavi, A. Babapoor, S. Hashemi, B. Medi

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引用次数: 11

摘要

硝基苯(NB)有广泛的用途，作为化学中间体，也作为染料在印刷应用。NB虽然有很多优点，但对人类和动物都是有害的，是一种环境污染物。在本研究中，研究了聚噻吩(PT)纳米颗粒包被氧化石墨烯(GO)吸附去除水中的NB。采用XRD、FTIR、BET和SEM对所制备的纳米复合材料进行了表征。虽然FTIR测试证明PT的成功结合，但与其他研究相比，SEM图像显示的表面积相对较大。BET分析通过报告吸附剂的表面积为917.8 m2/g证实了这一发现。采用Langmuir等温线和Freundlich等温线评价了吸附机理。结果表明，Freundlich等温线比Langmuir等温线更能描述吸附过程。另一方面，拟二级动力学模型较好地回归了实验结果，表明了化学吸附机理。在最佳的pH、时间、吸附剂用量和洗脱液类型下，对样品的吸附-解吸行为进行了评价。结果表明，合成的纳米复合材料在pH为5.0 ~ 7.0的溶液中均能有效去除NB，最大吸附量为15.6 mg/g。

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Adsorption and Removal Characterization of Nitrobenzene by Graphene Oxide Coated by Polythiophene Nanoparticles

Nitrobenzene (NB) has a wide range of usages as a chemical intermediate and also as a dye in printing applications. Despite its advantages, NB is harmful to human and animals and hence is an environmental pollutant. In this research, NB removal from water was studied via adsorption on graphene oxide (GO) coated by polythiophene (PT) nanoparticles. The resulting nanocomposite was characterized by XRD, FTIR, BET, and SEM. While the FTIR tests proved successful incorporation of PT, the SEM images displayed a relatively larger surface area compared to other studies. The BET analysis confirms this finding by reporting the surface area as 917.8 m2/g for the adsorbent. The adsorption mechanism was assessed by the Langmuir and Freundlich isotherms. The results show that the Freundlich isotherm better describes the adsorption process compared to the Langmuir isotherm. On the other hand, the pseudo-second-order kinetic model better regresses the experimental results, which indicates a chemical adsorption mechanism. The adsorption-desorption behavior of the samples was evaluated at optimized pH, time, adsorbent dosage, and eluent type. The results showed that the synthesized nanocomposite can efficiently remove NB from solutions in the pH range of 5.0 to 7.0, with the maximum adsorption capacity of 15.6 mg/g.

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

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