Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Environmental Science & Technology》 2018-06
Add to Favorite Get Latest Update

Degradation of Congo Red by a New Photo-Fenton Catalyst of Fe_3O_4@GO@TiO_2

ZHANG Ling;CAI Ying;HUANG Chunmei;CHEN Kangzi;XIAO Kaijun;PU Jun;CHEN Jing;Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province,Food Science Innovation Team of Guangdong Higher Education Institutes;College of Environmental and Biological Engineering,Guangdong University of Petrochemical Technology;College of Food Science and Engineering,South China University of Technology;  
The Fe_3O_4@GO@TiO_2ternary composite light-Fenton catalyst was prepared by hydrothermal method,which was applied to the degradation of Congo red.The structure of the catalyst was characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The effects of the initial p H,initial substrate concentration,H_2O_2addition and degradation temperature on the degradation of Congo red were investigated by single factor experiments,and the ideal conditions for the degradation of Congo red were established.And the stability of the catalyst was evaluated by several cycles.The results show that Fe_3O_4@GO@TiO_2ternary composite light-Fenton catalyst is nearly spherical particles with a diameter of about 2μm,and XRD patterns show that the catalyst is a ternary structure.When the catalyst dosage is 500 mg/L,the optimum conditions for the catalytic degradation of Congo red were initial p H 3.0-5.0,initial concentration of substrate 30 mg/L,addition of H_2O_2 1.5%,and degradation temperature 50℃.The decolorization rate reached 90%when the reaction time was 200 min.After 5 cycles,the dissolution rate of iron ions was less than 0.17 mg/L,with high recovery of magnetic Fe_3O_4.The decolorization rate was above 90%,and the X-ray diffraction pattern did not change before and after catalysis,which indicated that the catalyst had good stability.
【Fund】: 2016年“攀登计划”广东大学生科技创新培育专项资金项目(pdjh2016a0330);; 广东省岭南特色果蔬加工关键技术及应用工程技术研究中心项目(粤科函产学研字[2015]1487号;; 广东普通高校食品科学创新团队项目(2016KCXTD020)
【CateGory Index】: X791
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved