Synthesis of high-surface-area rod-like alumina materials with enhanced Cr(VI) removal efficiency

Xiangyu Xu; Qingquan Yu; Zhi Lv; Jiaqing Song; Mingyuan He

doi:10.1016/j.micromeso.2016.12.002

Synthesis of high-surface-area rod-like alumina materials with enhanced Cr(VI) removal efficiency

Xiangyu Xu
, Qingquan Yu
, Zhi Lv
, Jiaqing Song^*
, Mingyuan He

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

Beijing University of Chemical Technology

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

24 Scopus citations

Abstract

A facile synthesis of rod-like alumina materials was developed through systematical investigation, which enables the control of the specific surface area of ammonium aluminium carbonate hydroxide (AACH) using aluminum nitrate as a precursor and urea as a precipitant. Our studies indicated that the molar ratio of CO(NH₂)₂/Al influences crystallinity, morphology and the surface area of alumina materials. Amorphous alumina materials with nanorod morphology and high surface area (1029 m² g^-1) was obtained with 15:1 M ratio of CO(NH₂)₂ to Al. In addition, the results demonstrated that thermal behaviors of the as-prepared AACH affect their crystallinities. Furthermore, the amorphous Al₂O₃ prepared from AACH by calcination at 773 K was used as an adsorbent for Cr(VI) removal from water solution, and external factors were investigated, including contact time, adsorbent dosage, initial concentration of adsorbate and the pH of solution. It was found that the maximum adsorption capacity of prepared amorphous Al₂O₃ for Cr(VI) was 52.1 mg g⁻¹, which was higher than those of other reported Al₂O₃ samples.

Original language	English
Pages (from-to)	140-147
Number of pages	8
Journal	Microporous and Mesoporous Materials
Volume	262
DOIs	https://doi.org/10.1016/j.micromeso.2016.12.002
State	Published - 15 May 2018

Keywords

Adsorption
Alumina
Ammonium aluminium carbonate hydroxide
Cr(VI)
Surface area

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10.1016/j.micromeso.2016.12.002

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title = "Synthesis of high-surface-area rod-like alumina materials with enhanced Cr(VI) removal efficiency",

abstract = "A facile synthesis of rod-like alumina materials was developed through systematical investigation, which enables the control of the specific surface area of ammonium aluminium carbonate hydroxide (AACH) using aluminum nitrate as a precursor and urea as a precipitant. Our studies indicated that the molar ratio of CO(NH2)2/Al influences crystallinity, morphology and the surface area of alumina materials. Amorphous alumina materials with nanorod morphology and high surface area (1029 m2 g-1) was obtained with 15:1 M ratio of CO(NH2)2 to Al. In addition, the results demonstrated that thermal behaviors of the as-prepared AACH affect their crystallinities. Furthermore, the amorphous Al2O3 prepared from AACH by calcination at 773 K was used as an adsorbent for Cr(VI) removal from water solution, and external factors were investigated, including contact time, adsorbent dosage, initial concentration of adsorbate and the pH of solution. It was found that the maximum adsorption capacity of prepared amorphous Al2O3 for Cr(VI) was 52.1 mg g−1, which was higher than those of other reported Al2O3 samples.",

keywords = "Adsorption, Alumina, Ammonium aluminium carbonate hydroxide, Cr(VI), Surface area",

author = "Xiangyu Xu and Qingquan Yu and Zhi Lv and Jiaqing Song and Mingyuan He",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Inc.",

year = "2018",

month = may,

day = "15",

doi = "10.1016/j.micromeso.2016.12.002",

language = "英语",

volume = "262",

pages = "140--147",

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TY - JOUR

T1 - Synthesis of high-surface-area rod-like alumina materials with enhanced Cr(VI) removal efficiency

AU - Xu, Xiangyu

AU - Yu, Qingquan

AU - Lv, Zhi

AU - Song, Jiaqing

AU - He, Mingyuan

PY - 2018/5/15

Y1 - 2018/5/15

N2 - A facile synthesis of rod-like alumina materials was developed through systematical investigation, which enables the control of the specific surface area of ammonium aluminium carbonate hydroxide (AACH) using aluminum nitrate as a precursor and urea as a precipitant. Our studies indicated that the molar ratio of CO(NH2)2/Al influences crystallinity, morphology and the surface area of alumina materials. Amorphous alumina materials with nanorod morphology and high surface area (1029 m2 g-1) was obtained with 15:1 M ratio of CO(NH2)2 to Al. In addition, the results demonstrated that thermal behaviors of the as-prepared AACH affect their crystallinities. Furthermore, the amorphous Al2O3 prepared from AACH by calcination at 773 K was used as an adsorbent for Cr(VI) removal from water solution, and external factors were investigated, including contact time, adsorbent dosage, initial concentration of adsorbate and the pH of solution. It was found that the maximum adsorption capacity of prepared amorphous Al2O3 for Cr(VI) was 52.1 mg g−1, which was higher than those of other reported Al2O3 samples.

AB - A facile synthesis of rod-like alumina materials was developed through systematical investigation, which enables the control of the specific surface area of ammonium aluminium carbonate hydroxide (AACH) using aluminum nitrate as a precursor and urea as a precipitant. Our studies indicated that the molar ratio of CO(NH2)2/Al influences crystallinity, morphology and the surface area of alumina materials. Amorphous alumina materials with nanorod morphology and high surface area (1029 m2 g-1) was obtained with 15:1 M ratio of CO(NH2)2 to Al. In addition, the results demonstrated that thermal behaviors of the as-prepared AACH affect their crystallinities. Furthermore, the amorphous Al2O3 prepared from AACH by calcination at 773 K was used as an adsorbent for Cr(VI) removal from water solution, and external factors were investigated, including contact time, adsorbent dosage, initial concentration of adsorbate and the pH of solution. It was found that the maximum adsorption capacity of prepared amorphous Al2O3 for Cr(VI) was 52.1 mg g−1, which was higher than those of other reported Al2O3 samples.

KW - Adsorption

KW - Alumina

KW - Ammonium aluminium carbonate hydroxide

KW - Cr(VI)

KW - Surface area

UR - https://www.scopus.com/pages/publications/85035067992

U2 - 10.1016/j.micromeso.2016.12.002

DO - 10.1016/j.micromeso.2016.12.002

M3 - 文章

AN - SCOPUS:85035067992

SN - 1387-1811

VL - 262

SP - 140

EP - 147

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Synthesis of high-surface-area rod-like alumina materials with enhanced Cr(VI) removal efficiency

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Keywords

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