Maghemite (hematite) core (shell) nanorods via thermolysis of a molecular solid of Fe-complex

TitleMaghemite (hematite) core (shell) nanorods via thermolysis of a molecular solid of Fe-complex
Publication TypeJournal Article
Year of Publication2011
AuthorsChaudhari, NS, Warule, SS, Muduli, S, Kale, BB, Jouen, S, Lefez, B, Hannoyer, B, Ogale, SB
JournalDalton Transactions
Date Published2011
Type of ArticleArticle

An Fe-metal complex with 2'-hydroxy chalcone (2'-HC) ligands [Fe(III) (2'-hydroxy chalcone) 3] is synthesized by a chemical route and is subjected to different thermal treatments. Upon thermolysis in air at 450 degrees C for 3 h the complex yields maghemite (gamma-Fe(2)O(3)) nanorods with a thin hematite (alpha-Fe(2)O(3)) shell. X-Ray diffraction (XRD), Mossbauer spectroscopy, diffuse reflectance spectroscopy (UV-DRS), high resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometry (VSM) are used to characterize the samples. The stability of the ligand and the Fe-complex is further examined by using thermogravimmetric/differential thermal analysis (TGA/DTA). We suggest a residual ligand controlled mechanism for the formation of an anisotropic nanostructure in a crumbling molecular solid undergoing ligand decomposition. Since the band gap of iron oxide is in the visible range, we explored the use of our core shell nano-rod sample for photocatalytic activity for H(2) generation by H(2)S splitting under solar light. We observed high photocatalytic activity for hydrogen generation (75 ml h(-1)).

Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)3.76
Divison category: 
Physical and Materials Chemistry