SELECTIVE SYNTHESIS OF FE3O4,γ-FE2O3,AND α-FE2O3 USING CELLULOSE-BASED COMPOSITES AS PRECURSORS
Iron oxide with various phases such as Fe3O4,γ-Fe2O3,and α-Fe2O3 has been selective successfully synthesized using cellulose-based composites as precursors,which were obtained at 180 ℃ for 45 min by the microwave-hydrothermal method.The products were characterized with X-ray powder diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TG),derivative thermogravimetric(DTG),X-ray photoelectron spectroscopy(XPS),and scanning electron microscopy(SEM).Fe3O4,γ-Fe2O3,and α-Fe2O3 could be selectively synthesized by changing the calcination temperature and atmosphere.It was found that Fe3O4 was obtained in the N2 atmosphere.However,γ-Fe2O3 and α-Fe2O3 were observed at 300 and 500 ℃ for 3 h in the air atmosphere,respectively.The as-synthesized Fe3O4 and γ-Fe2O3 displayed superparamagnetic characteristics at room temperature via the magnetization measure.The methylene blue(MB)adsorption capacity of γ-Fe2O3(Air 300℃)can reach to 98.72%and the adsorption isotherms better fitted Freundlich isotherm models.This work provided a promising strategy for the synthesis of metal and carbon/metal composites using biomass as precursors.
Shan Liu Ke Yao Lian-Hua Fu Ming-Guo Ma
Beijing Key Laboratory of Lignocellulosic Chemistry,College of Materials Science and Technology,Beijing Forestry University Beijing 100083,PR China
国际会议
第五届制浆造纸新技术国际研讨会(ISETPP)暨第三届国际造纸与环境学术大会(IPEC)
广州
英文
1-7
2016-11-07（万方平台首次上网日期，不代表论文的发表时间）