Iron oxide nanoparticles stabilized inside highly ordered mesoporous silica

Pramana

N K Mal²  S Samanta¹  A Bhaumik1¹ 

[1] Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India$$;Dynamic Materials Research Group, National Institute of Advance Science & Technology (AIST), Kansai Center, 1-8-31, Osaka 563-8577, Japan$$

关键词: Mesoporous MCM-41;    nanomaterials;    iron oxide;    impregnation.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Nanosized iron oxide, a moderately large band-gap semiconductor and an essential component of optoelectrical and magnetic devices, has been prepared successfully inside the restricted internal pores of mesoporous silica material through in-situ reduction during impregnation. The samples were characterized by powder XRD, TEM, SEM/EDS, N2 adsorption, FT-IR and UV–visible spectroscopies. Characterization data indicated well-dispersed isolated nanoclusters of (Fe2O3)𝑛,` within the internal surface of 2D-hexagonal mesoporous silica structure. No occluded Fe/Fe2O3 crystallites were observed at the external surface of the mesoporous silica nanocomposites. Inorganic mesoporous host, such as hydrophilic silica in the pore walls, directs a physical constraint necessary to prevent the creation of large Fe2O3 agglomerates and enables the formation of nanosized Fe2O3 particles inside the mesopore.

【 授权许可】

Unknown