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<strong>Ultrafast adsorption of organic dyes by activated-carbon@Fe3O4 nanoscale composites: An effective solution for water purification</strong>

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Title Statement <strong>Ultrafast adsorption of organic dyes by activated-carbon@Fe3O4 nanoscale composites: An effective solution for water purification</strong>
 
Added Entry - Uncontrolled Name Saini, Parveen ; Polymeric & Soft Materials Section, National Physical Laboratory, New Delhi 110012, India
Sharma, Rahul ; Academy of Scientific & Innovative Research (AcSIR), New Delhi 110 012, India
Pant, R P ; EPR Spectroscopy and Magnetic Fluids Section, CSIR-National Physical Laboratory, New Delhi 110 012, India
Kotnala, R K ; Spintronics and Magnetic Materials Section, CSIR-National Physical Laboratory, New Delhi 110 012, India
CSIR
 
Uncontrolled Index Term material science and engineering
Activated charcoal (AC);Ferrofluid;Fe3O4 nanoparticles;Nanocomposites;Superparamagnetism;Methylene blue dye;Water purification;Adsorption
 
Summary, etc. Superparamagnetic (SPM) Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) decorated activated charcoal (AC) skeletal (AC@Fe<sub>3</sub>O<sub>4</sub>) type nanoscale composites (NCs) have been prepared by a scalable and facile approach involving impregnation of AC with stable dispersion of SPM Fe<sub>3</sub>O<sub>4</sub> NPs followed by controlled vacuum drying. These NCs exhibit coupled magnetic character and porosity which can be easily optimized by controlling weight ratio of two phases. The electron microscopy images show the presence of clustered Fe<sub>3</sub>O<sub>4</sub> particles present all over the surface of porous AC particles and prevalence of meso-pores, which provides the channels for ingress and immobilization of sorbent moieties. The magnetometry and nitrogen adsorption measurements reveal that magnetic character increases whereas porosity decreases with the increase in Fe<sub>3</sub>O<sub>4 </sub>NP loading. These NCs have been demonstrated for purification of water containing methylene blue (MB) dye as an impurity. The porosity of these composites allow rapid adsorption (&lt;1 min) of MB with good removal efficiency (&gt; 99%) and their magnetic behaviour helps in instantaneous separation of MB adsorbed NC particles by the application of external magnetic field. The sorbent can be reused several times after proper regeneration with retention of more than 95% of the original adsorption capacity.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2018-04-23 14:18:22
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/18158
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 56, ##issue.no## 3 (2018): Indian Journal of Pure & Applied Physics
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/18158/54754
http://op.niscair.res.in/index.php/IJPAP/article/download/18158/54755
 
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