A convenient synthesis of nanocrystalline chalcopyrite, CuFeS₂ using single‐source precursors

Abstract

Nanocrystalline chalcopyrite (CuFeS 2 ) have been synthesized using single-source precursors, CuL 2 and Cu(LH) 2 Cl 2 (where LH = monoacetylferrocene thiosemicarbazone) by pyrolysis and solvothermal decomposition methods. The nanocrystals were characterized by UV-visible spectroscopy, X-ray powder diffraction, transmission electron microscopy and energy dispersive X-ray analysis. The magnetic character was determined by the hysteresis loop. CuFeS 2 nanocrystallites prepared by the pyrolysis of CuL 2 and Cu(LH) 2 Cl 2 have a cubic phase and rod-like morphology with diameters of about 18 and 15 nm, respectively, and lengths of about 195-390 and 100-145 nm, respectively. However, CuFeS 2 nanoparticles obtained by solvothermal route from CuL 2 and Cu(LH) 2 Cl 2 , which are capped with ethylene glycol, possess a nearly spherical shape with an average grain size of 16 and 11 nm, respectively.

Preparation of ternary metal chalcogenide (M1-FexS, M = Cd and Zn) nanocrystallites using single source precursors

“…A band due to eNH stretching which is observed at 3140 cm À1 in the ligand is absent in the spectra of both the complexes. These observations are consistent with monoacetylferrocene thiosemicarbazone ligand coordination through sulfur and azomethine nitrogen atoms [23,24].…”

“…Recently we have reported the synthesis of chalcopyrite (CuFeS 2 ) nanorods and nanoparticles and Cu x Fe 1Àx S thin films using [CuL 2 ] and [Cu(LH) 2 Cl 2 ] (LH ¼ monoacetylferrocene thiosemicarbazone) as single source precursors [23,24]. To the best of our knowledge, the SSPs have not been used for the preparation of M 1Àx Fe x S (M ¼ Cd and Zn) nanocrystallites till date.…”

A facile synthetic approach for copper iron sulfide nanocrystals with enhanced thermoelectric performance

“…Every S atom resides in the tetrahedral void formed by the cationic elements. Compared with other tetrahedrally bonded compounds, the diverse interatomic distances (X-S) and the electronegativities between the cations in chalcopyrite CuFeS 2 may result in a natural distorted structure, 24 which would be effective for scattering the heat-carrying phonons, and thus lead to a decrease in thermal conductivity (thermal conductivities of Si, InP and ZnS are 130 W m À1 K À1 , 68 W m À1 K À1 and 27 W m À1 K À1 , respectively, which are all much larger than 5.09 W m À1 K À1 of chalcopyrite CuFeS 2 ) at 300 K. [25][26][27] Recently, solution-based synthesis of CuFeS 2 nanoparticles, 28,29 nanorods, 30,31 and nanowires 32 have been achieved. However, they require either complex precursors or long reaction times.…”

Ether based electrolyte improves the performance of CuFeS2 spike-like nanorods as a novel anode for lithium storage

“…The formation process could be summarized as follow [21,22] : FeSO 4 +CuSO 4 +Na 2 S 2 O 3 +H 2 O→CuFeS 2 +Na 2 SO 4 +H 2 SO 4 In traditional preparations, Cu + 、(NH 4 ) 2 S are usually used as the raw material [23,24] or organics as the solvents [19,24,25] . As we know, Cu + is more unstable than Fe 2+ within the same system and the cost of production of thiourea is higher than Na 2 S 2 O 3 , so taking advantage of Fe 2+ salt and thiosulfate as raw material is more attractive in consideration of cost.…”