Single-source route to chalcopyrite-type CuFeS2 and CuFeSe2 nanocrystals and their structural and optical studies

Akram, Rehana; Akhtar, Javeed; Akhtar, Masood; Malik, Mohammad Azad; Revaprasadu, Neerish; Khan, Malik Dilshad; Bhatti, Moazzam H.

doi:10.1007/s10854-022-09172-y

Cited by 4 publications

(4 citation statements)

References 50 publications

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“…The peaks at 1630, 1385 to 1140, and 1076 and 997 cm –1 absorption correspond to the OH bending vibration, atmospheric C–O vibration, and CS stretching vibration, respectively. Moreover, the peak observed in the wavenumber range from 594 to 673 cm –1 correlated with metal–sulfur vibrations such as CuS, FeS 2 , and CuFeS 2 bonds, respectively …”

Section: Resultsmentioning

confidence: 92%

“…For that reason, it exhibited high electrical conductivity, excellent electrochemical property, and a narrow band gap of 0.6 V (bulk). Moreover, it has been employed as multidisciplinary applications like lithium-ion batteries, supercapacitors, electrocatalysis, photocatalysis, solar cells, etc . In particular, ternary metal sulfides have exhibited an admirable electrochemical action because of synergetic effects of two metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it has been employed as multidisciplinary applications like lithium-ion batteries, supercapacitors, electrocatalysis, photocatalysis, solar cells, etc. 25 In particular, ternary metal sulfides have exhibited an admirable electrochemical action because of synergetic effects of two metal ions. For example, Ansari et al 26 synthesized CuFeS 2 nanomaterials via a solvothermal method for supercapacitor applications.…”

Section: Introductionmentioning

confidence: 99%

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Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Swathi

Yuvakkumar

Ravi

et al. 2023

ACS Appl. Nano Mater.

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Transition metal sulfides are widely employed as bifunctional electrocatalysts owing to their unique structural features, well-off active sites, and modifiable electronic and mechanical properties. Herein, we have synthesized highly efficient ternary copper iron sulfide (CuFeS 2 )/reduced graphene oxide (rGO) composites via a hydrothermal approach for an overall water splitting process. The tetragonal structure of CuFeS 2 microflowers anchored on rGO sheets is identified by using Xray analysis and compared with standard Joint Committee on Powder Diffraction Standards (JCPDS) #35-752. In Raman spectra, the existence of two bands D (defects) and G (graphitic) confirms the presence of the rGO composite with CuFeS 2, and the ratio of D and G band (I D /I G ) is observed to be 1.18. The morphological analysis using scanning electron microscopy and transmission electron microscopy substantiates the formation of microflowers with rGO sheets. The elemental composition of CuFeS 2 /rGO was analyzed by energy-dispersive X-ray analysis, which demonstrated a weight percentage of various compositions of Cu (18.07%), Fe (11.32%), S (13.88%), and C (56.74%). Moreover, the CuFeS 2 /rGO composites exhibited a high surface area, pore volume, and diameter of 50.352 m 2 /g, 0.162 cc/g, and 2.471 nm, respectively. The fabricated electrodes were examined by using electrochemical characterization. The obtained results clearly showed low overpotential and low Tafel slope values in both the oxygen evolution reaction (OER) (176 mV and 216 mV/dec) and hydrogen evolution reaction (HER) (153 mV and 150 mV/dec) processes. In addition, the fabricated composite exhibited low 1.59 V cell voltages for an overall water splitting process with more excellent stability, and it showed a faradaic efficiency of 97.8% for H 2 and 95.5% for O 2 . Therefore, the composite of rGO in ternary metal sulfide plays a predominant role in improving the electrocatalytic activity of the material, and the CuFeS 2 /rGO composite emerges as a promising electrode for the water splitting process.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Swathi

Yuvakkumar

Ravi

et al. 2023

ACS Appl. Nano Mater.

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“…Single-source precursors (SSPs) are defined as solitary species that contain all the elements required for a synthetic reaction. − In our case, a SSP for BiOX would contain Bi, O, and X within one species. SSPs have broad applications, including chemical vapor deposition of films, intermetallic nanoparticle synthesis, and industrial manufacturing of complex metal oxides and chalcogenides. − The benefits of SSPs over their multisource counterparts include improved homogeneity, stoichiometric control, no differences in precursor rates of vaporization, reaction, or nucleation, and most importantly to us, the molecular combination of incompatible functional groups. ,, …”

Section: Introductionmentioning

confidence: 99%

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

et al. 2023

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Bismuth oxyhalides are a promising class of photocatalysts for harvesting solar energy. These materials are often synthesized in aqueous media with poor synthetic control resulting from the extremely fast nucleation and growth rates of the particles. These fast rates are caused by the rapid precipitation of bismuth salts with free halide ions. We have developed watersoluble precursors combining bismuth with either chlorine or bromine atoms in the same metal−organic complex. With the application of heat, halide ions are released, which then precipitate with bismuth ions as BiOX (X = Cl, Br). By controlling the halide ion formation rate, the nucleation and growth rates of BiOX materials can be tuned to provide synthetic control. The diverse potential of these precursors is demonstrated by synthesizing BiOX in three ways: aqueous colloidal synthesis, solid-state decomposition, and fabrication of films of BiOX via spray pyrolysis of the aqueous precursor solutions. These broadly applicable single-source precursors will enhance the ability to synthesize future BiOX materials with controlled morphologies.

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Theoretical insights into narrow bandgap CuFeS2 chalcopyrite for thermophotovoltaic applications

Ismail,

Abir,

Mondal

et al. 2024

Materials Today Communications

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Single-source route to chalcopyrite-type CuFeS2 and CuFeSe2 nanocrystals and their structural and optical studies

Cited by 4 publications

References 50 publications

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Ternary Copper Iron Sulfide Microflowers Anchored on Reduced Graphene Oxide for Water Splitting

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

Theoretical insights into narrow bandgap CuFeS2 chalcopyrite for thermophotovoltaic applications

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