화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.28, No.4, 1126-1132, April, 2011
DOI10.1007/s11814-010-0471-5  Export Citation
Efficient degradation of methylene blue dye by catalytic oxidation using the Na8Nb6O19·13H2O/H2O2 system
Chengtang Liu1, 2, Hui Xu3, Huaming Li1, †, Ling Liu3, Li Xu3, and Zhixiang Ye4
  • 1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
  • 2School of the Environment, Jiangsu University, Zhenjiang 212013, P. R. China
  • 3School of the Environment, Jiangsu University, Zhenjiang 212013, P. R. China, Korea
  • 4College of Resource and Environment, Chengdu University of Information Technology, Chengdu 610225, P. R. China
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Na8Nb6O19·13H2O particles were synthesized by a simple hydrothermal method. The catalysts were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and thermogravimetric and differential scanning (TG-DSC). The XRD and TG-DSC analyses indicated that Na8Nb6O19·13H2O was an intermediate hexaniobate during the preparation of NaNbO3 powders. Methylene blue (MB) dye degradation using Na8Nb6O19·13H2O/H2O2, Nb2O5/H2O2 and NaNbO3/H2O2 systems were investigated, respectively. Among the catalytic oxidation systems, Na8Nb6O19·13H2O showed the highest activity for degradation of MB in the presence of H2O2. The results indicated that the dye degradation efficiency could be 93.5% at 30 ℃ after 60 min in the presence of the Na8Nb6O19·13H2O/H2O2 system. It was also found that the degradation of MB over the catalytic systems followed pseudo-first-order kinetics, and the degradation rate was 0.02376 min.1 in the Na8Nb6O19·13H2O/H2O2 system, which was higher than that in the Nb2O5/H2O2 and NaNbO3/H2O2 systems. A possible mechanism for MB catalytic oxidation degradation using the Na8Nb6O19·13H2O H2O2 system was proposed.
Keywords:Na8Nb6O19·13H2O/H2O2;Methylene Blue;Degradation
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