纳米Fe_3O_4类酶催化Na_2S_2O_8氧化降解对硝基酚  

Degradation of p-Nitrophenol with Na_2S_2O_8 activated by peroxidase-like Fe_3O_4 magnetic nanoparticles

作　　者：江吉周[1] 邹菁[1] 黄蕾[1] 张远孝[1] 江海鹏[1] 

机构地区：[1]武汉工程大学化工与制药学院湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430074

出　　处：《武汉工程大学学报》2010年第12期23-26,31,共5页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(NO.21077037);湖北省自然科学基金(NO.2009CDB078)

摘　　要：采用超声辅助反向共沉淀法制备了高活性的Fe3O4磁性纳米颗粒(Fe3O4MNPs).采用XRD,FT-IR和Raman等仪器对Fe3O4MNPs的组成、结构进行了表征和研究.以Fe3O4MNPs为类酶催化剂,Na2S2O8为氧化剂,在室温25℃的条件下,降解对硝基酚的优化条件为:10 mg.L-1对硝基酚溶液,在pH=3.8,Fe3O4MNPs用量为0.9 g.L-1,Na2S2O8用量为6.3 mmol.L-1时,无需超声、紫外光照和Gamma辐射的条件下,30 min后其降解率达到97%以上.Fe3O4 magnetic nanoparticles（Fe3O4 MNPs） with highly-efficient were successfully prepared through an advanced reverse co-precipitation method under the assistance of ultrasound irradiation.The structure and morphology were characterized by X-ray powder diffraction（XRD）,Fourier transform infrared spectroscopy（FT-IR） and Raman spectroscopy.Removal of p-Nitrophenol（p-NP） pollutant was investigated by using Na2S2O8 as an oxidant and Fe3O4 magnetic nanoparticles（MNPs） as a peroxidase mimetic in a wide pH range from 2.0 to 10.0 at 25 ℃.It was found that Na2S2O8（6.3 mmol·L-1） was activated by 0.9 g·L-1 Fe3O4 MNPs at pH 3.8 and removing of 10 mg·L-1 p-NP was above 97% in 30 min,without heat or ultrasound-assisted or UV or Gamma irradiation.

关 键 词：Fe3O4MNPs 反向共沉淀法 对硝基酚 类酶催化剂 

分 类 号：X592[环境科学与工程—环境工程]