Synthesis and characterization of hexagonal faceted copper sulfide (Cu1.8S) nanodisks

Senthilkumar, M.; Babu, S. Moorthy

doi:10.1016/j.mssp.2015.06.024

Cited by 11 publications

(7 citation statements)

References 36 publications

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“…Copper-containing nanomaterials have been shown to possess potential applications in solar cells [5], photocatalysis [6], supercapacitors [10], nanometre-scale switches, and high-capacity cathode materials in lithium secondary batteries, superconductor, thermoelectric cooling material, and solar-energy absorption [11,12]. These varied applications of copper sulphide semiconductor materials stem from their unique optical, electronic, and photocatalytic properties that are influenced by their morphology, their stoichiometric composition, and their crystalline phases, which are tuneable by various reaction parameters such as their capping agent, the nature of their precursor, and their reaction temperature [7][8][9]13]. Capping agents stabilize the surface of copper sulphide to prevent agglomeration and to obtain monodisperse nanoparticles (NPs) [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

et al. 2022

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In this study, two copper(II) complexes, [Cu(C6H8N3S2)2]Cl2 (1) and [Cu(C7H10N3S2)2]Cl2·H2O (2), were synthesized from 2-(thiophen-2-ylmethylene)hydrazine-1-carbothioamide (L1H) and 2-(1-(thiophen-2-yl)ethylidene)hydrazine-1-carbothioamide (L2H) respectively and characterized using various spectroscopic techniques and elemental analyses. The as-prepared complexes were used as single-source precursors for the synthesis of oleylamine-capped (OLA@CuxSy), hexadecylamine-capped (HDA@CuxSy), and dodecylamine-capped (DDA@CuxSy) copper sulphide nanoparticles (NPs) via the thermolysis method at 190 °C and 230 °C and then characterized using powder X-ray diffraction (p-XRD), UV-visible spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The p-XRD diffraction patterns confirmed the formation of crystalline rhombohedral digenite Cu9S5 with the space group R-3m. The TEM images showed the formation of nanoparticles of various shapes including hexagonal, rectangular, cubic, truncated-triangular, and irregularly shaped Cu9S5 nanomaterials. The SEM results showed aggregates and clusters as well as the presence of pores on the surfaces of nanoparticles synthesized at 190 °C. The UV-visible spectroscopy revealed a general blue shift observed in the absorption band edge of the copper sulphide NPs, as compared to bulk CuxSy, with energy band gaps ranging from 2.52 to 3.00 eV. Energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition of the Cu9S5 nanoparticles. The nanoparticles obtained at 190 °C and 230 °C were used as catalysts for the photocatalytic degradation of methylene blue (MB) under UV irradiation. Degradation rates varying from 47.1% to 80.0% were obtained after 90 min of exposure time using only 10 mg of the catalyst, indicating that Cu9S5 nanoparticles have potential in the degradation of organic pollutants (dyes).

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Section: Introductionmentioning

confidence: 99%

“…Significant efforts have been devoted to phase-controlled synthesis of copper sulphide NPs [13][14][15]. Several methods have been developed for structure-controlled synthesis of copper sulphide nanoparticles, including microwave irradiation [16], solvothermal [17], and thermolysis of a single-source precursor [18,19].…”

Section: Introductionmentioning

confidence: 99%

Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

et al. 2022

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“…Copper sulfides (with a formula of Cu 2– x S, with x ≤ 1) have been extensively researched. , They are intrinsic hole-conducting (p-type) semiconductors, and usually they exhibit a direct bandgap ranging from 1.2 to 2.5 eV, depending on the specific phase and stoichiometry . It was shown that the bandgap can be tuned by varying the concentration of Cu vacancies . Cu 2– x S is a low-cost, environmentally benign, nontoxic material .…”

Section: Introductionmentioning

confidence: 99%

“…46,47 They are intrinsic holeconducting (p-type) semiconductors, 42 and usually they exhibit a direct bandgap ranging from 1.2 to 2.5 eV, 46 depending on the specific phase and stoichiometry. 48 It was shown that the bandgap can be tuned by varying the concentration of Cu vacancies. 48 Cu 2−x S is a low-cost, environmentally benign, nontoxic material.…”

Section: ■ Introductionmentioning

confidence: 99%

“…48 It was shown that the bandgap can be tuned by varying the concentration of Cu vacancies. 48 Cu 2−x S is a low-cost, environmentally benign, nontoxic material. 49 Due to its excellent thermoelectric properties, 50,51 it is considered a promising candidate for various applications such as cathodes of lithium-ion batteries, 52−54 solar cell absorbers, 55,56 sensors, 57−59 and various optoelectronic devices.…”

Section: ■ Introductionmentioning

confidence: 99%

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Digenite (Cu₉S₅): Layered p-Type Semiconductor Grown by Reactive Annealing of Copper

et al. 2018

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Most of the recently discovered layered materials such as MoS 2 or MoSe 2 are n-type, while few materials, such as phosphorene, which suffers from rapid oxidation, are p-type. To form devices such as p−n junctions and heterojunctions, new p-type mono-/few-layers are needed. Here, we report a one-step synthesis of layered, crystalline, ptype copper sulfide by thermal annealing of a standard copper foil in an inert environment using chemical vapor deposition (CVD). Optical spectroscopies (photoluminescence and absorption) show definite correlating features around 2.5 eV. Surface photovoltage spectroscopy shows a photovoltage reduction around the same energy range, which would be expected from a bandgap of a p-type material, and p-type conductivity was also observed using a thermoelectric probe. TEM, XRD, and AFM showed that the synthesized material is layered and has a unique stoichiometry of Cu 9 S 5 . Using sonication and dropcasting, we succeeded to isolate few-layers and monolayers. We observed good bulk electrical conductivity and characterized the electrical conductivity of few-layer copper sulfide flakes using peak force tunneling atomic force microscopy (PF-TUNA). We observed an increase in conductivity for increasing number of layers. Given its conductivity and layered morphology, we tested the synthesized Cu 9 S 5 as an electrode for a Li-ion battery. The proposed bottom-up synthesis, which is simple and scalable, allows synthesizing bulk quantities of the p-type layered Cu 9 S 5 which can then be exfoliated (top-down) to deposit monolayer flakes on substrates. Combined with the progress achieved in the preparation of n-type layered materials, this p-type Cu 9 S 5 opens the door to the fabrication of 2D p−n heterojunctions.

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Role of processing parameters in solution routes for controlling size, shape, and morphology of chalcogenide nanoparticles

Yadav

Bajpai

2022

Copper Nanostructures: Next-Generation of Agrochemicals for Sustainable Agroecosystems

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Synthesis and characterization of hexagonal faceted copper sulfide (Cu1.8S) nanodisks

Cited by 11 publications

References 36 publications

Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

Digenite (Cu₉S₅): Layered p-Type Semiconductor Grown by Reactive Annealing of Copper

Role of processing parameters in solution routes for controlling size, shape, and morphology of chalcogenide nanoparticles

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Synthesis and characterization of hexagonal faceted copper sulfide (Cu1.8S) nanodisks

Cited by 11 publications

References 36 publications

Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

Digenite (Cu9S5): Layered p-Type Semiconductor Grown by Reactive Annealing of Copper

Role of processing parameters in solution routes for controlling size, shape, and morphology of chalcogenide nanoparticles

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Digenite (Cu₉S₅): Layered p-Type Semiconductor Grown by Reactive Annealing of Copper