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用于高效吸附亚甲基蓝的氮掺杂还原氧化石墨烯

Nitrogen-doped reduced graphene oxide for high efficient adsorption of methylene blue.

作者信息

Kang Maoping, Pei Yongli, Zhang Ying, Su Lihong, Li Yuxiang, Wang Hongyu

机构信息

Department of Energy Chemistry and Materials Engineering, Shanxi Institute of Energy, Jinzhong, China.

出版信息

Front Chem. 2025 Jan 6;12:1484610. doi: 10.3389/fchem.2024.1484610. eCollection 2024.

DOI:10.3389/fchem.2024.1484610
PMID:39834845
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11743702/
Abstract

A highly efficient and widely applicable adsorbent for the removal of methylene blue (MB) was created using nitrogen-doped and reduced graphene oxide (NRGO). The effects of NRGO mass, pH, contact time, and the initial MB concentration on the adsorption properties of MB onto NRGO were investigated. The results showed that the adsorption behavior remained stable within the pH range of 2.0-10.0, and the adsorption process gradually reached equilibrium after 24 h. Additionally, the adsorption kinetics and adsorption isotherms were discussed to propose a theoretical adsorption mechanism. Meanwhile, some characterizations including Scanning Electron Microscopy, Energy Disperse X-ray Spectroscopy, X-ray Photoelectron Spectroscopy, X-ray Powder Diffraction, Fourier Transform Infrared Spectroscopy, etc. were used to explore potential adsorption mechanism, which indicated the physisorption caused by π-π bonds was the main adsorption mechanism. NRGO exhibits efficient MB absorption and holds significant potential application for the wastewater treatment.

摘要

使用氮掺杂还原氧化石墨烯（NRGO）制备了一种用于去除亚甲基蓝（MB）的高效且广泛适用的吸附剂。研究了NRGO质量、pH值、接触时间和初始MB浓度对MB在NRGO上吸附性能的影响。结果表明，在2.0 - 10.0的pH范围内吸附行为保持稳定，吸附过程在24小时后逐渐达到平衡。此外，还讨论了吸附动力学和吸附等温线以提出理论吸附机制。同时，利用扫描电子显微镜、能量色散X射线光谱、X射线光电子能谱、X射线粉末衍射、傅里叶变换红外光谱等表征手段探索潜在的吸附机制，结果表明由π - π键引起的物理吸附是主要吸附机制。NRGO对MB表现出高效吸附性能，在废水处理方面具有重要的潜在应用价值。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/2c9dc1bb477f/fchem-12-1484610-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/32bfc7ad4a9c/fchem-12-1484610-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/9c77ba57c5df/fchem-12-1484610-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/41e79b62f0b5/fchem-12-1484610-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/173470e6f78f/fchem-12-1484610-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/590096b10b5b/fchem-12-1484610-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/77c039a9c9ac/fchem-12-1484610-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/baa386a2807c/fchem-12-1484610-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/9ff17967c0d7/fchem-12-1484610-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/2c9dc1bb477f/fchem-12-1484610-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/32bfc7ad4a9c/fchem-12-1484610-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/9c77ba57c5df/fchem-12-1484610-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/41e79b62f0b5/fchem-12-1484610-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/173470e6f78f/fchem-12-1484610-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/590096b10b5b/fchem-12-1484610-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/77c039a9c9ac/fchem-12-1484610-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/baa386a2807c/fchem-12-1484610-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/9ff17967c0d7/fchem-12-1484610-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/93be/11743702/2c9dc1bb477f/fchem-12-1484610-g009.jpg

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