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Journal of Zhejiang University SCIENCE A

ISSN 1673-565X(Print), 1862-1775(Online), Monthly

2014 Vol.15 No.8 P.671-680

Synthesis of flower-like α-Fe2O3 and its application in wastewater treatment

Kun Xie, Xiang-xue Wang, Zheng-jie Liu, Ahmed Alsaedi, Tasawar Hayat, Xiang-ke Wang

Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Chongqing 404100, China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia

xkwang@ipp.ac.cn

Abstract: The removal of arsenic from aqueous solution is crucial to human health and environmental pollution. Herein, flower-like α-Fe2O3 nanostructures were synthesized via a template-free microwave-assisted solvothermal technique, and were applied as adsorbents for the removal of arsenic (As(V)) from aqueous solutions. The results indicated that the synthesized flower-like α-Fe2O3 showed excellent sorption properties and had a maximum sorption capacity of 47.64 mg/g for As(V). Meanwhile, the experimental results of photodegradation of methylene blue (MB) indicated that the as-synthesized flower-like α-Fe2O3 exhibited very high photocatalytic performance for the photodegradation of MB and that the as-obtained flower-like α-Fe2O3 nanostructures were suitable materials in wastewater treatment.

Key words: Flower-like α-Fe2O3, Arsenate, Sorption, Methylene blue (MB), Photodegradation

Chinese Summary  <488> 花状氧化铁的制备及其在废水处理中的应用


研究目的：研究花状氧化铁的制备并探讨其对砷的吸附性能和亚甲基蓝的催化性能。
创新要点：1.合成了花状氧化铁；2.发现Langmuir模型能更好地模拟砷的吸附过程；3.发现花状氧化铁对亚甲基蓝有很好的催化降解性能。
研究方法：1.使用扫描电镜、投射电镜、X射线衍射和BET比表面及孔径分析仪对合成的花状氧化铁进行表征；2.采用静态实验法研究砷的吸附性能及亚甲基蓝的催化行为。
重要结论：1.采用一种低成本的溶剂热法合成了花状氧化铁；2.合成的花状氧化铁有着较大的比表面积并对砷有着很好的吸附性能，并且吸附率随着pH的增加而降低。同时发现Langmuir模型能更好地模拟砷的吸附过程；3.亚甲基蓝的初始浓度和花状氧化铁的用量对催化性能影响较为明显，花状氧化铁有较好的重复利用性；4.合成的花状氧化铁可以应用于大批废水的处理。

关键词组：花状氧化铁；砷；吸附；亚甲基蓝；光降解


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DOI:

10.1631/jzus.A1400133

CLC number:

X52

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On-line Access:

2014-08-04

Received:

2014-05-11

Revision Accepted:

2014-06-22

Crosschecked:

2014-07-18

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