کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1335459 1500272 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of Co3O4 nanoplates by simple thermolysis of the [Co(NH3)6]2(C2O4)3·4H2O complex
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of Co3O4 nanoplates by simple thermolysis of the [Co(NH3)6]2(C2O4)3·4H2O complex
چکیده انگلیسی

Nanoplates of Co3O4 were selectively prepared through solid-state thermolysis of the [Co(NH3)6]2(C2O4)3·4H2O complex at 350 °C without the need for an expensive and toxic solvent/surfactant or complicated equipment. The product was characterized by thermal analysis (TGA/DTG/DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, UV–Vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and magnetic measurements. The TEM images show that the product was formed mainly from square-like Co3O4 nanoplates with a length of 50 ∼ 200 nm and thickness of 10–20 nm. The FT-IR, XRD, Raman, EDS and VSM results confirm that the as-prepared Co3O4 nanoplates are pure and single-phase with a weak ferromagnetic behavior that could be attributed to uncompensated surface spins and/or finite-size effects. The optical spectrum indicated two direct band gaps at 2.15 and 3.50 eV with a blue shift compared with the bulk samples. A plausible pathway for the formation of Co3O4 nanoplates from the [Co(NH3)6]2(C2O4)3·4H2O complex was also proposed.

Nanoplates of Co3O4 were selectively prepared through solid-state thermolysis of the [Co(NH3)6]2(C2O4)3·4H2O complex at 350 °C without the need for an expensive and toxic solvent/surfactant or complicated equipment.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 67, 8 January 2014, Pages 104–110
نویسندگان
, , ,