Preparation of α-Fe2O3 hollow spheres, nanotubes, nanoplates and nanorings as high efficient Cr(VI) adsorbents

Zhong Liu; Ruitao Yu; Yaping Dong; Wu Li; Wuzong Zhou

doi:10.1039/C6RA15245G

Preparation of α-Fe₂O₃hollow spheres, nanotubes, nanoplates and nanorings as high efficient Cr(VI) adsorbents

Zhong Liu, Ruitao Yu, Yaping Dong, Wu Li, Wuzong Zhou

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

Abstract

α-Fe₂O₃ nanoparticle with different morphologies, such as hollow spheres, nanotubes with limited {0001} plane exposed, nanoplates and nanorings with the {0001} plane predominantly exposed, have been synthesised by using NaH₂PO₄ and urea in a facile hydrothermal method. The mechanism of the morphology evolution from hollow sphere to nanoring has been investigated. It is proposed that the polymerisation of Fe³⁺/H₂PO₄⁻ plays an important role in the formation of these morphologies. The adsorption of Cr (VI) from aqueous solution onto these α-Fe₂O₃ nanoparticles showed that the α-Fe₂O₃ with nanoring morphology has the highest removal efficiency, and the adsorption capacity reached to 16.9 mg/g. These results indicate that the adsorption mechanism of Cr (VI) onto hematite nanoparticles is a chemisorption process through doubly and triply coordinated hydroxyl groups on the outer surface of α-Fe₂O₃.

Original language	English
Pages (from-to)	82854-82861
Number of pages	8
Journal	RSC Advances
Volume	6
Issue number	86
Early online date	23 Aug 2016
DOIs	https://doi.org/10.1039/C6RA15245G
Publication status	E-pub ahead of print - 23 Aug 2016

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10.1039/C6RA15245G

Zhou_Fe2O3_240816
Copyright 2016 the Authors. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1039/C6RA15245G
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@article{e5226c82d62f4582983e095e9bade9ae,

title = "Preparation of α-Fe2O3 hollow spheres, nanotubes, nanoplates and nanorings as high efficient Cr(VI) adsorbents",

abstract = "α-Fe2O3 nanoparticle with different morphologies, such as hollow spheres, nanotubes with limited {0001} plane exposed, nanoplates and nanorings with the {0001} plane predominantly exposed, have been synthesised by using NaH2PO4 and urea in a facile hydrothermal method. The mechanism of the morphology evolution from hollow sphere to nanoring has been investigated. It is proposed that the polymerisation of Fe3+/H2PO4− plays an important role in the formation of these morphologies. The adsorption of Cr (VI) from aqueous solution onto these α-Fe2O3 nanoparticles showed that the α-Fe2O3 with nanoring morphology has the highest removal efficiency, and the adsorption capacity reached to 16.9 mg/g. These results indicate that the adsorption mechanism of Cr (VI) onto hematite nanoparticles is a chemisorption process through doubly and triply coordinated hydroxyl groups on the outer surface of α-Fe2O3.",

author = "Zhong Liu and Ruitao Yu and Yaping Dong and Wu Li and Wuzong Zhou",

note = "This work was financially supported by the National Nature Science Foundation of China (No: 51302280, 51574286), Natural Science Foundation in Qinghai province (No: 2014-ZJ- 936Q). CAS {"}Light of West China{"} Program and Youth Innovation Promotion Association (2016377), CAS.",

year = "2016",

month = aug,

day = "23",

doi = "10.1039/C6RA15245G",

language = "English",

volume = "6",

pages = "82854--82861",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Preparation of α-Fe2O3 hollow spheres, nanotubes, nanoplates and nanorings as high efficient Cr(VI) adsorbents

AU - Liu, Zhong

AU - Yu, Ruitao

AU - Dong, Yaping

AU - Li, Wu

AU - Zhou, Wuzong

N1 - This work was financially supported by the National Nature Science Foundation of China (No: 51302280, 51574286), Natural Science Foundation in Qinghai province (No: 2014-ZJ- 936Q). CAS "Light of West China" Program and Youth Innovation Promotion Association (2016377), CAS.

PY - 2016/8/23

Y1 - 2016/8/23

N2 - α-Fe2O3 nanoparticle with different morphologies, such as hollow spheres, nanotubes with limited {0001} plane exposed, nanoplates and nanorings with the {0001} plane predominantly exposed, have been synthesised by using NaH2PO4 and urea in a facile hydrothermal method. The mechanism of the morphology evolution from hollow sphere to nanoring has been investigated. It is proposed that the polymerisation of Fe3+/H2PO4− plays an important role in the formation of these morphologies. The adsorption of Cr (VI) from aqueous solution onto these α-Fe2O3 nanoparticles showed that the α-Fe2O3 with nanoring morphology has the highest removal efficiency, and the adsorption capacity reached to 16.9 mg/g. These results indicate that the adsorption mechanism of Cr (VI) onto hematite nanoparticles is a chemisorption process through doubly and triply coordinated hydroxyl groups on the outer surface of α-Fe2O3.

AB - α-Fe2O3 nanoparticle with different morphologies, such as hollow spheres, nanotubes with limited {0001} plane exposed, nanoplates and nanorings with the {0001} plane predominantly exposed, have been synthesised by using NaH2PO4 and urea in a facile hydrothermal method. The mechanism of the morphology evolution from hollow sphere to nanoring has been investigated. It is proposed that the polymerisation of Fe3+/H2PO4− plays an important role in the formation of these morphologies. The adsorption of Cr (VI) from aqueous solution onto these α-Fe2O3 nanoparticles showed that the α-Fe2O3 with nanoring morphology has the highest removal efficiency, and the adsorption capacity reached to 16.9 mg/g. These results indicate that the adsorption mechanism of Cr (VI) onto hematite nanoparticles is a chemisorption process through doubly and triply coordinated hydroxyl groups on the outer surface of α-Fe2O3.

UR - http://www.rsc.org/suppdata/c6/ra/c6ra15245g/c6ra15245g1.pdf

U2 - 10.1039/C6RA15245G

DO - 10.1039/C6RA15245G

M3 - Article

SN - 2046-2069

VL - 6

SP - 82854

EP - 82861

JO - RSC Advances

JF - RSC Advances

IS - 86

ER -

Preparation of α-Fe₂O₃hollow spheres, nanotubes, nanoplates and nanorings as high efficient Cr(VI) adsorbents

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