Journal ArticleDOI
Fabrication of Fe3O4/SiO2 core/shell nanoparticles attached to graphene oxide and its use as an adsorbent
Yunjin Yao,Shiding Miao,Shaoming Yu,Li Ping Ma,Hongqi Sun,Shaobin Wang +5 more
- Vol. 379, Iss: 1, pp 20-26
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TLDR
Thermodynamic parameters indicated that the adsorption of methylene blue onto the material was thermodynamically feasible and could occur spontaneously and a second-order kinetic equation could best describe the sorption kinetics.Abstract:
Amino-functionalized Fe(3)O(4)/SiO(2) core/shell nanoparticles were synthesized by reacting Fe(3)O(4) nanoparticles with tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane to introduce amino groups on the surface. The amino groups on the Fe(3)O(4)/SiO(2) were reacted with the carboxylic groups of graphene oxide (GO) with the aid of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinnimide to form Fe(3)O(4)/SiO(2)GO nanoparticles. The structural, surface, and magnetic characteristics of the material were investigated by scanning and transmission electron microscopy, energy-dispersive X-ray spectrometry, powder X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Adsorption equilibrium and kinetics of methylene blue on the Fe(3)O(4)/SiO(2)GO were studied in a batch system. The maximum adsorption capacities were found to be 97.0, 102.6, and 111.1 mg g(-1) at 25, 45, and 60°C, respectively. A second-order kinetic equation could best describe the sorption kinetics. Thermodynamic parameters indicated that the adsorption of methylene blue onto the material was thermodynamically feasible and could occur spontaneously.read more
Citations
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Adsorptive remediation of environmental pollutants using novel graphene-based nanomaterials
TL;DR: Graphene oxide and graphene are new carbonaceous nanomaterials as discussed by the authors and have a large theoretical specific surface area and graphene oxide has functional groups, indicating their potential for the adsorption processes.
Journal ArticleDOI
Role of graphene/metal oxide composites as photocatalysts, adsorbents and disinfectants in water treatment: a review
TL;DR: A comprehensive review on the application of metal oxide/graphene composites in water treatment and their role as photocatalyst, adsorbent and disinfectant in water remediation is presented in this article.
Journal ArticleDOI
Graphene oxide: A promising nanomaterial for energy and environmental applications
TL;DR: Graphene oxide (GO), the functionalized graphene with oxygen-containing chemical groups, has recently attracted resurgent interests because of its superior properties such as large surface area, mechanical stability, tunable electrical and optical properties as discussed by the authors.
Journal ArticleDOI
Magnetic recoverable MnFe2O4 and MnFe2O4-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants
TL;DR: The as-prepared MnFe2O4 and MnFe 2O4-rGO hybrid exhibited stable performance to remove the organic pollutants in wastewater with easy recycling and good stability by successive degradation experiments.
Journal ArticleDOI
Recent advances in the use of graphene-family nanoadsorbents for removal of toxic pollutants from wastewater
TL;DR: A synthesis of the current knowledge available on this broad and versatile family of graphene nanomaterials for removal of dyes, potentially toxic elements, phenolic compounds and other organic chemicals from aquatic systems is presented.
References
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Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
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Graphene Anchored with Co 3 O 4 Nanoparticles as Anode of Lithium Ion Batteries with Enhanced Reversible Capacity and Cyclic Performance
Zhong-Shuai Wu,Wencai Ren,Lei Wen,Libo Gao,Jinping Zhao,Zongping Chen,Guangmin Zhou,Feng Li,Hui-Ming Cheng +8 more
TL;DR: Wu, Zhong-Shuai; Ren, Wencai; Wen, Lei; Gao, Libo; Zhao, Jinping; Chen, Zongping; Zhou, Guangmin; Li, Feng; Cheng, Hui-Ming.
Journal ArticleDOI
A kinetics and thermodynamics study of methylene blue adsorption on wheat shells
Yasemin Bulut,Haluk Aydın +1 more
TL;DR: In this paper, the use of wheat shells for the removal of methylene blue from aqueous solutions at different contact times, temperatures, pH, adsorbent doses and initial dye concentration was investigated.
Journal ArticleDOI
Amino-functionalized Fe3O4@SiO2 core–shell magnetic nanomaterial as a novel adsorbent for aqueous heavy metals removal
TL;DR: The present work highlights the potential for using amino-functionalized Fe(3)O(4)@SiO(2) magnetic nanoparticles as an effective and recyclable adsorbent for the removal of heavy metal ions in water and wastewater treatment.
Journal ArticleDOI
Experimental and kinetic studies on methylene blue adsorption by coir pith carbon.
D. Kavitha,Chinnaiya Namasivayam +1 more
TL;DR: Kinetic study showed that the adsorption of dye on coir pith carbon was a gradual process and pH effect and desorption studies suggest that chemisorption might be the major mode of the Adsorption process.