Rapid synthesis and characterization of nearly dispersed marcasite CuSe2 and berzelianite Cu2Se crystallites using the chemical reduction process

Yang, Chang Ting; Hsiang, Hsing I.

doi:10.1016/j.materresbull.2017.08.052

Cited by 27 publications

(7 citation statements)

References 27 publications

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“…The colloidal solutions of CuInSe 2 , CuInS 2 , and QDs have commonly been synthesized through solvothermal, electrochemical, and hydrothermal methods involving organic solvents, 13–18 raising concerns over biocompatibility and future clinical translation. Accordingly, it is an ongoing quest to find alternative water-based synthetic methods to alleviate issues regarding toxicity.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

2022

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In this work, manganese (Mn)-doped CuInSe quantum dots (QDs) with a ZnS passivation layer (MnCuInSe/ZnS) have been synthesized via a one-pot microwave-assisted hydrothermal reaction using glutathione (GSH) as a stabilizer. The MnCuInSe/ZnS core-shell QDs combine magnetic resonance imaging (MRI), excitation-dependent red emission, and reactive oxygen radical generation functions, in which regulation of Mn2+ incorporation leads to synergistic imaging and therapeutic modalities. The MnCuInSe/ZnS QDs exhibit high colloidal and photochemical stability in simulated media and at different pH values. An r2/r1 ratio of 9.99 was calculated from MRI studies suggesting their potential application as dual-modal imaging agents. Based on in vitro tests on Hela, B16, and HepG2 cell lines, it is apparent that MnCuInSe/ZnS QDs impose no significant cytotoxicity in the dark, while they can efficiently generate singlet oxygen radicals for photodynamic therapy of cancers, killing more than 80% of B16 cells within 5 min of laser irradiation (671 nm, 1 W cm−2). Furthermore, in vitro fluorescence imaging and cellular internalization of QDs are examined to visualize cellular uptake and in situ ROS generation. Therefore, this research exemplifies a new set of multifunctional chalcogenide QDs for theranostic applications.

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Section: Introductionmentioning

confidence: 99%

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

2022

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“…Among the different inorganic materials, copper and manganese chalcogenides are of interest because of their wider availability, low toxicity, cost-effectiveness, and applications in diverse fields. Manganese chalcogenides exist in three different crystallographic phases, α-(rock salt), β-(zinc blende), and γ-(wurtzite), among which the α-phase is the most stable. − Likewise, copper chalcogenides exist in various stoichiometric ratios, ranging from metal-rich (i.e., Cu 2 S and Cu 2 Se) to stoichiometric compounds (i.e., CuS and CuSe), − while its crystallographic forms are orthorhombic, hexagonal, monoclinic, cubic, and tetragonal. , The multiple crystallographic modifications of these materials make it challenging to produce single-phase selectively with high purity. Moreover, obtaining a uniform size and morphology is also a challenge as it shows a range of morphologies such as spherical, sheet-like, discotic, hexagonal, or multifaceted polyhedral nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Precursor Engineering for the Synthesis of Mixed Anionic Metal (Cu, Mn) Chalcogenide Nanomaterials via Solvent-Less Synthesis

et al. 2022

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Metal–organic ligands with mixed chalcogenides are potential compounds for the preparation of mixed anionic metal chalcogenide alloys. However, only a few of such ligands are known, and their complexes are not well explored. We have prepared homo- and hetero-dichalcogenoimidodiphosphinate [(EE′P i Pr2NH)] (E, E′ = Se, Se; S, S; S, Se) complexes of manganese and copper through metathetical reactions. The X-ray single crystal structure of [Mn{(SeP i Pr2)2N}2] 1 revealed a triclinic crystal system, with a MnSe4 core unit, whereas the crystal structure determination of [Mn{(SP i Pr2)(SeP i Pr2)N}2] 2 indicated a triclinic crystal system with a Mn(S/Se)2 unit. Both metal centers are tetrahedral, with two deprotonated bidentate ligands forming the coordination sphere. The free ligand was found to exhibit a gauche configuration in the solid state. The energies of the various rotamers of dithio-analogue were studied by DFT calculations. The decomposition behavior of complexes with homo- and heterochalcogenides was investigated, and the complexes were employed as single-source precursors to generate manganese and copper chalcogenides through solvent-less melt reactions between 500 and 550 °C. The deposited powders were characterized by powder X-ray diffraction (p-XRD), scanning electron microscopy (SEM), energy dispersive analysis of X-ray (EDAX), transmission electron microscopy (TEM), and elemental mapping. MnS, MnSe2, and MnSSe phases were obtained from the decomposition of respective manganese complexes. In contrast, the decomposition of copper-based complexes yielded Cu2–x Se and the sulfur-doped Cu3Se2 phase from seleno- and mixed thio/seleno-complexes of Cu, respectively. The morphology ranged from random sheet-like structures to agglomerated platelets, while the selected area electron diffraction (SAED) revealed the crystalline nature of the materials. Depending on the nature of the complex and the temperature, different amounts of phosphorus were present as an impurity in the synthesized products.

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“…Within this area, copper selenide is a p-type semiconductor, which has attracted attention in recent years due to its active band gap energy in the visible range of the solar spectrum. The band gap of copper selenide depends on its structure, phase, and stoichiometry; 15,16 the band gap energies reported for Cu 3 Se2, 17,18 CuSe 2 , Cu 2 Se, 19 CuSe, and Cu 2-x Se 20 are 1.65−1.85, 1.49, 1.98, 2.0, and 2.17 eV, respectively. Copper selenide can be used in different applications such as solar cells, 21 supercapacitors, 22 optoelectronic systems, 17 and photocatalysis under natural sunlight.…”

Section: Introductionmentioning

confidence: 99%

Transformation of Nanostructures Cu₂O to Cu₃Se₂ through Different Routes and the Effect on Photocatalytic Properties

et al. 2020

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In this work, copper selenide (Cu 3 Se 2 umangite phase) was synthesized by two routes, using a chemical reaction and the hydrothermal method to obtain CuSe-A and CuSe-H, respectively. The synthesis of Cu 3 Se 2 consisted of a three-step process: in the first step, copper(I) oxide hexapods (Cu 2 O) were obtained as the copper reservoir; in the second step, selenium ions were obtained from the reduction of selenium powder; and in the third step involves mixing two precursors following the two synthesis routes mentioned before. Analysis of X-ray diffraction and X-ray photoelectron spectroscopy showed the formation of the Cu 3 Se 2 phase by both synthesis routes. On the other hand, using the scanning electron microscopy (SEM) technique, it is observed that the Cu 3 Se 2 sample (CuSe-A) is obtained by exchanging in solution with agitation and that the copper selenium phase grows only on the surface of the hexapods. Meanwhile, the hydrothermal route promotes a total conversion of copper(I) oxide hexapods to the copper selenide phase (CuSe-H). The resulting materials were tested as photocatalytic materials to remove methylene blue dye in water under sunlight irradiation. Cu 3 Se 2 (CuSe-H) obtained by the hydrothermal route exhibited a higher efficiency of photodegradation of dye, reaching a removal percentage of 92% after 4 h under sunlight.

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Rapid synthesis and characterization of nearly dispersed marcasite CuSe2 and berzelianite Cu2Se crystallites using the chemical reduction process

Cited by 27 publications

References 27 publications

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

Precursor Engineering for the Synthesis of Mixed Anionic Metal (Cu, Mn) Chalcogenide Nanomaterials via Solvent-Less Synthesis

Transformation of Nanostructures Cu₂O to Cu₃Se₂ through Different Routes and the Effect on Photocatalytic Properties

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Rapid synthesis and characterization of nearly dispersed marcasite CuSe2 and berzelianite Cu2Se crystallites using the chemical reduction process

Cited by 27 publications

References 27 publications

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

Multifunctional MnCuInSe/ZnS quantum dots for bioimaging and photodynamic therapy

Precursor Engineering for the Synthesis of Mixed Anionic Metal (Cu, Mn) Chalcogenide Nanomaterials via Solvent-Less Synthesis

Transformation of Nanostructures Cu2O to Cu3Se2 through Different Routes and the Effect on Photocatalytic Properties

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Transformation of Nanostructures Cu₂O to Cu₃Se₂ through Different Routes and the Effect on Photocatalytic Properties