Development of magnetic Sr5(PO4)3(OH)/Fe3O4 nanorod for adsorption of Congo red from solution

Fan Zhang; Xiaoju Yin; Weihua Zhang

doi:10.1016/j.jallcom.2015.10.178

Development of magnetic Sr₅(PO₄)₃(OH)/Fe₃O₄ nanorod for adsorption of Congo red from solution

Fan Zhang, Xiaoju Yin, Weihua Zhang

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Magnetic Sr₅(PO₄)₃(OH)/Fe₃O₄ (SPF) nanorod with rough surfaces was prepared and characterized using different techniques, such as SEM, EDS, TEM, SAED, HRTEM, XRD, XPS, PPMS and FT-IR. The adsorption behavior of Congo red (CR) from aqueous solution onto the as-prepared SPF nanorod was systematically investigated. Adsorption isotherm data indicated that the adsorption of CR onto SPF was monolayer adsorption which followed well the Langmuir isotherm model. The maximal CR uptake by SPF was 396 mg/g in the test. Kinetics parameters were in accord with pseudo-second-order equation, and the maximum sorption capacity calculated was 294 mg/g, which was close to the experimental value. For thermodynamic studies, parameters such as the Gibbs free energy, the enthalpy and the entropy indicated that the adsorption process was spontaneous and exothermic in nature. The removal of CR was attributed to the hydrogen bond and ionic interactions. Moreover, SPF can be easily magnetic separated and reused. The adsorption capacity was approximately 89% of the initial saturation adsorption capacity after being used five times.

Original language	English (US)
Pages (from-to)	809-817
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	657
DOIs	https://doi.org/10.1016/j.jallcom.2015.10.178
State	Published - Feb 5 2016

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153 ) and the Youth Fund of Nanjing Agricultural University .

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

Adsorption
Congo red
Magnetic nanorod
Mechanism

Publisher link

10.1016/j.jallcom.2015.10.178

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title = "Development of magnetic Sr5(PO4)3(OH)/Fe3O4 nanorod for adsorption of Congo red from solution",

abstract = "Magnetic Sr5(PO4)3(OH)/Fe3O4 (SPF) nanorod with rough surfaces was prepared and characterized using different techniques, such as SEM, EDS, TEM, SAED, HRTEM, XRD, XPS, PPMS and FT-IR. The adsorption behavior of Congo red (CR) from aqueous solution onto the as-prepared SPF nanorod was systematically investigated. Adsorption isotherm data indicated that the adsorption of CR onto SPF was monolayer adsorption which followed well the Langmuir isotherm model. The maximal CR uptake by SPF was 396 mg/g in the test. Kinetics parameters were in accord with pseudo-second-order equation, and the maximum sorption capacity calculated was 294 mg/g, which was close to the experimental value. For thermodynamic studies, parameters such as the Gibbs free energy, the enthalpy and the entropy indicated that the adsorption process was spontaneous and exothermic in nature. The removal of CR was attributed to the hydrogen bond and ionic interactions. Moreover, SPF can be easily magnetic separated and reused. The adsorption capacity was approximately 89% of the initial saturation adsorption capacity after being used five times.",

keywords = "Adsorption, Congo red, Magnetic nanorod, Mechanism",

author = "Fan Zhang and Xiaoju Yin and Weihua Zhang",

note = "Funding Information: This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153 ) and the Youth Fund of Nanjing Agricultural University . Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

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doi = "10.1016/j.jallcom.2015.10.178",

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T1 - Development of magnetic Sr5(PO4)3(OH)/Fe3O4 nanorod for adsorption of Congo red from solution

AU - Zhang, Fan

AU - Yin, Xiaoju

AU - Zhang, Weihua

N1 - Funding Information: This work was financially supported by the National Natural Science Funds of China (Grant No. 51402153 ) and the Youth Fund of Nanjing Agricultural University . Publisher Copyright: © 2015 Elsevier B.V.

PY - 2016/2/5

Y1 - 2016/2/5

N2 - Magnetic Sr5(PO4)3(OH)/Fe3O4 (SPF) nanorod with rough surfaces was prepared and characterized using different techniques, such as SEM, EDS, TEM, SAED, HRTEM, XRD, XPS, PPMS and FT-IR. The adsorption behavior of Congo red (CR) from aqueous solution onto the as-prepared SPF nanorod was systematically investigated. Adsorption isotherm data indicated that the adsorption of CR onto SPF was monolayer adsorption which followed well the Langmuir isotherm model. The maximal CR uptake by SPF was 396 mg/g in the test. Kinetics parameters were in accord with pseudo-second-order equation, and the maximum sorption capacity calculated was 294 mg/g, which was close to the experimental value. For thermodynamic studies, parameters such as the Gibbs free energy, the enthalpy and the entropy indicated that the adsorption process was spontaneous and exothermic in nature. The removal of CR was attributed to the hydrogen bond and ionic interactions. Moreover, SPF can be easily magnetic separated and reused. The adsorption capacity was approximately 89% of the initial saturation adsorption capacity after being used five times.

AB - Magnetic Sr5(PO4)3(OH)/Fe3O4 (SPF) nanorod with rough surfaces was prepared and characterized using different techniques, such as SEM, EDS, TEM, SAED, HRTEM, XRD, XPS, PPMS and FT-IR. The adsorption behavior of Congo red (CR) from aqueous solution onto the as-prepared SPF nanorod was systematically investigated. Adsorption isotherm data indicated that the adsorption of CR onto SPF was monolayer adsorption which followed well the Langmuir isotherm model. The maximal CR uptake by SPF was 396 mg/g in the test. Kinetics parameters were in accord with pseudo-second-order equation, and the maximum sorption capacity calculated was 294 mg/g, which was close to the experimental value. For thermodynamic studies, parameters such as the Gibbs free energy, the enthalpy and the entropy indicated that the adsorption process was spontaneous and exothermic in nature. The removal of CR was attributed to the hydrogen bond and ionic interactions. Moreover, SPF can be easily magnetic separated and reused. The adsorption capacity was approximately 89% of the initial saturation adsorption capacity after being used five times.

KW - Adsorption

KW - Congo red

KW - Magnetic nanorod

KW - Mechanism

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