Low-Cost Synthesis of Flowerlike α-Fe2O3 Nanostructures for Heavy Metal Ion Removal: Adsorption Property and Mechanism

被引：412

作者：

Cao, Chang-Yan ^{[1
]}

Qu, Jin ^{[1
]}

Yan, Wen-Sheng ^{[2
]}

Zhu, Jun-Fa ^{[2
]}

Wu, Zi-Yu ^{[2
]}

Song, Wei-Guo ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci BNLMS, Beijing 100190, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

来源：

LANGMUIR | 2012年 / 28卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ARSENIC REMOVAL; DRINKING-WATER; OXIDE; PERFORMANCE;

D O I：

10.1021/la300097y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Flowerlike alpha-Fe2O3 nanostructures were synthesized via a template-free microwave-assisted solvothermal method. All chemicals used were low-cost compounds and environmentally benign. These flowerlike alpha-Fe2O3 nanostructures had high surface area and abundant hydroxyl on their surface. When tested as an adsorbent for arsenic and chromium removal, the flowerlike alpha-Fe2O3 nanostructures showed excellent adsorption properties. The adsorption mechanism for As-V and Cr-VI onto flowerlike alpha-Fe2O3 nanostructures was elucidated by X-ray photoelectron spectroscopy and synchrotron-based X-ray absorption near edge structure analysis. The results suggested that ion exchange between surface hydroxyl groups and As-V or Cr-VI species was accounted for by the adsorption. With maximum capacities of 51 and 30 mg g(-1) for As-V and Cr-VI, respectively, these low-cost flowerlike alpha-Fe2O3 nanostructures are an attractive adsorbent for the removal of As-V and Cr-VI from water.

引用

页码：4573 / 4579

页数：7

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