Synthesis of anisotropic Cu2−xS-based nanostructures by thermal oxidation

Kusior, Anna; Jeleń, Piotr; Mazurków, Julia; Nieroda, Paweł; Radecka, M.

doi:10.1007/s10973-019-08622-w

Cited by 11 publications

(4 citation statements)

References 36 publications

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“…EDS analysis was employed to evaluate the semi-quantitative weight percentage of the elemental constituent as well as the purity of the three samples [44][45][46]. The EDS spectra shown in Figure 8a-c [55] the concentration of Cu increases more than S, with an increasing ratio of copper ions at a ratio of 2:1, which is similar to the trend observed in this study. Also, the concentration of these elements implies that a significant quantity of the copper chloride was not retained during synthesis.…”

Section: Fesem and Eds Results Of Cus Macro/nanoparticlessupporting

confidence: 75%

“…The EDS spectra shown in Figure8a-cdisplay the elemental constituents of C 90.23, Cu 5.31, and S 1.15 for CuSa; C 93.4, Cu 0.71, and S 0.4 for CuSb; and C 92.84, Cu 6.3, and S 0.35 for CuSc, thus confirming the purity of the as-prepared CuS sample. According to Kusior et al[55] the concentration of Cu increases more than S, with an increasing ratio of copper ions at a ratio of 2:1, which is similar to the trend observed in this study. Also, the concentration of these elements implies that a significant quantity of the copper chloride was not retained during synthesis.…”

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confidence: 91%

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Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Agoro

Meyer

2023

Inorganics

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Nanostructured metal sulfides such as copper sulfide (CUS) form from single-source precursors (SSPs) and are cost-friendly materials that can be used in a one-pot approach with potential applications in dye-sensitizer solar cells (DSCs). This is an attractive pathway that allows the careful control of tailoring the design of the nanostructures with slight variations in the mixture conditions to form uniform nanoparticles and enhance the performance of DSCs. We report on the optical, structural, and morphological properties of CuS as photosensitizers and their application in QDSCs using characterization techniques such as cyclic voltammetry (CV), current–voltage (I-V), UV-Vis spectroscopy (UV-Vis), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), etc. The UV-Vis reveals that the band gap for the three samples is found at 2.05–2.87 eV, confirming them as suitable materials for solar cells. The XRD peaks for the three CuS nanoparticles harmonized very well with hexagonal CuS. The thermal gravimetric (TGA) suitability of the three complexes shows a two-step decomposition within the temperature range of 125–716 °C, with a final residue of 2–4%. CV curves for three samples show that none of the developed metal sulfides exhibits a peak indicative of limited catalytic activity in the iodine electrolyte. The I-V overall energy conversion efficiency (η%) of 4.63% for the CuSb photosensitizer is linked to the wide electronic absorption spectrum and better relative dye loading. The synthesis of photosensitizers from a trioctylphosphine oxide (TOPO) capping agent shows improved efficiency compared to our previous studies, which used hexadecylamine as a coordinating solvent.

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Section: Fesem and Eds Results Of Cus Macro/nanoparticlessupporting

confidence: 75%

supporting

confidence: 91%

Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Agoro

Meyer

2023

Inorganics

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“…Detailed synthesis procedure is described elsewhere [ 33 ]. Briefly, 0.010 mol of CuCl 2 (1.34 g) and 0.018 mol of thiourea (1.52 g) were dissolved in 160 mL of ethanol.…”

Section: Methodsmentioning

confidence: 99%

Nonenzymatic Glucose Sensors Based on Copper Sulfides: Effect of Binder-Particles Interactions in Drop-Casted Suspensions on Electrodes Electrochemical Performance

Mazurków

Kusior

Radecka

2021

Sensors

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The constant progress in novel nanomaterials synthesis has contributed to the rapid development of nonenzymatic glucose sensors. For working electrodes preparation, drop casting proved to be the most convenient and thus most widely applied method. However, appropriate interpretation of obtained electrochemical signal requires in-depth knowledge of limitations related to this technique. In this study, we prepared solutions based on commonly reported polymers for nanostructures immobilization and investigated their influence on copper sulfides distribution on the electrode. Characterization of suspensions properties and behavior of particles during droplet drying revealed that nonionic polyvinylpyrrolidone (PVP) was favorable for electrodes modification with copper sulfides in comparison with Nafion and chitosan. It ensured homogeneity of the suspension as well as the uniform coverage of the electrode surface with particles, what resulted in increased active surface area and, therefore, higher signal from glucose addition. On the other hand, when cationic chitosan was used as a binder, suspensions were agglomerated and, within dry deposits, a coffee-ring effect was observed. Appropriate adjustment of material and polymer interactions led to enhanced electrode electrochemical performance.

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“…Copper sulfide microstructures were obtained according to a previously reported procedure [ 25 ]. In the synthesis, 62.5 and 112.5 mM solutions of CuCl 2 and thiourea, respectively, were prepared in 160 mL of ethanol.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Characterization of Modified Glassy Carbon Electrodes for Non-Enzymatic Glucose Sensors

Mazurków

Kusior

Radecka

2021

Sensors

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The diversity of materials proposed for non-enzymatic glucose detection and the lack of standardized protocols for assessing sensor performance have caused considerable confusion in the field. Therefore, methods for pre-evaluation of working electrodes, which will enable their conscious design, are currently intensively sought. Our approach involved comprehensive morphologic and structural characterization of copper sulfides as well as drop-casted suspensions based on three different polymers—cationic chitosan, anionic Nafion, and nonionic polyvinylpyrrolidone (PVP). For this purpose, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman spectroscopy were applied. Subsequently, comparative studies of electrochemical properties of bare glassy carbon electrode (GCE), polymer- and copper sulfides/polymer-modified GCEs were performed using electrochemical impedance spectroscopy (EIS) and voltammetry. The results from EIS provided an explanation for the enhanced analytical performance of Cu-PVP/GCE over chitosan- and Nafion-based electrodes. Moreover, it was found that the pH of the electrolyte significantly affects the electrocatalytic behavior of copper sulfides, indicating the importance of OHads in the detection mechanism. Additionally, diffusion was denoted as a limiting step in the irreversible electrooxidation process that occurs in the proposed system.

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Synthesis of anisotropic Cu2−xS-based nanostructures by thermal oxidation

Cited by 11 publications

References 36 publications

Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Influence of a One-Pot Approach on a Prepared CuS Macro/Nanostructure from Various Molecular Precursors

Nonenzymatic Glucose Sensors Based on Copper Sulfides: Effect of Binder-Particles Interactions in Drop-Casted Suspensions on Electrodes Electrochemical Performance

Electrochemical Characterization of Modified Glassy Carbon Electrodes for Non-Enzymatic Glucose Sensors

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