Investigation on microwave absorbing properties of loaded MnFe2O4 and degradation of Reactive Brilliant Red X-3B

被引：70
作者：
Fang, Xue [1 ]
Xiao, Jun [1 ]
Yang, Shaogui [1 ]
He, Huan [1 ]
Sun, Cheng [1 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Loaded manganese ferrite; Microwave absorbing property; Dye degradation; Microtoxicity; ENHANCED CATALYTIC DEGRADATION; AQUEOUS-SOLUTION; DYE; OXIDATION; FE; WATER; CO; DECOMPOSITION; ADSORPTION; REMOVAL;
D O I：
10.1016/j.apcatb.2014.07.022
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Four nanocomposite catalysts namely MnFe2O4, MnFe2O4-SiC, MnFe2O4-TiO2 and MnFe2O4-diatomite, were synthesized and characterized by X-ray diffraction (XRD) and N-2 adsorption (BET specific surface area). Measurements of the catalysts' complex permittivity and permeability in the microwave (MW) frequency range of 0.5-18 GHz showed MnFe2O4-SiC composites to be the best MW absorbers. The surface temperature of MnFe2O4-SiC (1450 degrees C) under MW was higher compared to those of the other three catalysts, indicating that silicon carbide (SiC) was an effective support. MW-assisted experiments demonstrated that the degradation of RBR X-3B with MnFe2O4-SiC reached 92%, achieved 70% of TOC removal and exhibited lower toxicity with 5 min MW irradiation, proving MnFe2O4-SiC to be an excellent microwave catalyst. These findings are important regarding the development of efficient sorbents that are effective microwave absorbers as well as catalysts of rapid degradation of pollutants. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：544 / 550
页数：7
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