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

IF 3.8 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Frontiers in Chemistry Pub Date : 2025-01-06 eCollection Date: 2024-01-01 DOI:10.3389/fchem.2024.1484610

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

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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.

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氮掺杂还原氧化石墨烯高效吸附亚甲基蓝。

利用氮掺杂和还原氧化石墨烯（NRGO）制备了一种高效、广泛适用的亚甲基蓝（MB）吸附剂。考察了NRGO质量、pH、接触时间和初始浓度对甲基溴在NRGO上吸附性能的影响。结果表明：吸附行为在pH 2.0 ~ 10.0范围内保持稳定，24 h后吸附过程逐渐达到平衡，并通过吸附动力学和吸附等温线进行了讨论，提出了吸附理论机理。同时，利用扫描电镜、能量分散x射线能谱、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讨了吸附机理，表明π-π键引起的物理吸附是主要吸附机理。NRGO表现出高效的MB吸收，在废水处理中具有重要的潜在应用。

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来源期刊

Frontiers in Chemistry Chemistry-General Chemistry

CiteScore

8.50

自引率

3.60%

发文量

1540

审稿时长

12 weeks

期刊介绍： Frontiers in Chemistry is a high visiblity and quality journal, publishing rigorously peer-reviewed research across the chemical sciences. Field Chief Editor Steve Suib at the University of Connecticut is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to academics, industry leaders and the public worldwide. Chemistry is a branch of science that is linked to all other main fields of research. The omnipresence of Chemistry is apparent in our everyday lives from the electronic devices that we all use to communicate, to foods we eat, to our health and well-being, to the different forms of energy that we use. While there are many subtopics and specialties of Chemistry, the fundamental link in all these areas is how atoms, ions, and molecules come together and come apart in what some have come to call the “dance of life”. All specialty sections of Frontiers in Chemistry are open-access with the goal of publishing outstanding research publications, review articles, commentaries, and ideas about various aspects of Chemistry. The past forms of publication often have specific subdisciplines, most commonly of analytical, inorganic, organic and physical chemistries, but these days those lines and boxes are quite blurry and the silos of those disciplines appear to be eroding. Chemistry is important to both fundamental and applied areas of research and manufacturing, and indeed the outlines of academic versus industrial research are also often artificial. Collaborative research across all specialty areas of Chemistry is highly encouraged and supported as we move forward. These are exciting times and the field of Chemistry is an important and significant contributor to our collective knowledge.