Methyl Orange removal by a novel PEI-AuNPs-hemin nanocomposite |
| |
Authors: | Weiwen Hu Xuehua Yu Qiong Hu Jinming Kong Lianzhi Li Xueji Zhang |
| |
Institution: | 1 School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China;2 Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, China;3 Chemistry Department, College of Arts and Sciences, University of South Florida, FL 33620-4202, USA |
| |
Abstract: | A novel poly(ethyleneimine)/Au nanoparticles/hemin nanocomposite (PEI-AuNPs-Hemin) acting for Methyl Orange (MO) removal has been synthesized. PEI-AuNPs was prepared firstly and it was then linked to hemin through the coupling between carboxyl groups in hemin and amino groups in PEI without the activation of carboxyl groups. The high reactivity and stability of AuNPs contributed greatly in the formation of the amido bonds in the nanocomposite. Fourier transform infrared spectroscopy, transmission electron microscopy and UV–visible spectroscopy were used to characterize the PEI-AuNPs-Hemin. Results show that PEI-AuNPs-Hemin has strong adsorption for MO. Adsorption and degradation experiments were carried out at different pHs, nanocomposite concentrations and UV irradiation times. Removal of MO in acidic solutions was more effective than in basic solutions. The real-time study showed that the MO degradation with the nanocomposite under UV irradiation was a fast process. In addition, the photocatalytic degradation mechanism was proposed. The study suggests that the PEI-AuNPs-Hemin may have promising applications in environmental monitoring and protection. |
| |
Keywords: | Poly(ethyleneimine) Hemin Au nanoparticle Nanocomposite Methyl Orange removal |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|