Microwave-assisted synthesis of γ-AlOOH/rGO nanocomposite for removal of methylene blue

IF 5.1 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2025-03-01 Epub Date: 2025-02-15 DOI:10.1016/j.diamond.2025.112116

Xing-Wei Han, Haojun Zou, Chong Lu, Sijia Wang, Xue Gao

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Abstract

Dyes contamination has long been an intractable water pollution problem that has puzzled researchers. Nubbly γ-AlOOH particles consisted of several flakes were in-situ decorated onto the surface of reduced graphene oxide (rGO) via an in-situ microwave-assisted hydrothermal method for removal of methylene blue (MB) in this work. The structure and composition of resulting γ-AlOOH/rGO nanocomposite was characterized by XRD, FTIR, Raman, SEM, EDS, XPS and BET. The adsorption behavior of γ-AlOOH/rGO towards MB could be described by the pseudo-second-order model and Langmuir model satisfactorily. The maximal adsorption capacity for MB was estimated to be 487.804 mg/g by Langmuir model. The concerning adsorption process was exothermic and spontaneous according to the thermodynamic study. Electrostatic interactions, hydrogen bonds, π-π interaction and van der Waals force together constitute the possible adsorption mechanism. The γ-AlOOH/rGO also had good recycling performance, which make it a potential adsorbent for dye removal in sewage treatment.

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微波辅助合成γ-AlOOH/rGO纳米复合材料去除亚甲基蓝

染料污染一直是困扰研究人员的一个棘手的水污染问题。采用原位微波辅助水热法在还原氧化石墨烯（rGO）表面原位修饰块状γ-AlOOH颗粒，以去除亚甲基蓝（MB）。采用XRD、FTIR、Raman、SEM、EDS、XPS和BET等手段对合成的γ-AlOOH/rGO纳米复合材料的结构和组成进行了表征。γ-AlOOH/rGO对MB的吸附行为可以用拟二阶模型和Langmuir模型满意地描述。通过Langmuir模型估计其对MB的最大吸附量为487.804 mg/g。热力学研究表明，该吸附过程为放热自发吸附过程。静电相互作用、氢键、π-π相互作用和范德华力共同构成了可能的吸附机理。γ-AlOOH/rGO具有良好的循环利用性能，是污水处理中有潜力的脱色吸附剂。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.