Mild hydrothermal synthesis of hexagonal CuS nanoplates

Chu, Limei; Zhou, Baibin; Mu, Hongchen; Sun, Yi-Sui; Xu, Ping

doi:10.1016/j.jcrysgro.2008.09.159

Cited by 34 publications

(27 citation statements)

References 32 publications

(45 reference statements)

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“…These results indicate that the CuS crystal phase is a thermodynamically stable compound in which under a suitable

{normalCu}^{2 +} : S_{2} O_{3}^{2 -}

mole ratio, its formation is feasible regardless of the synthesis temperature and reaction time applied. In the reaction between Cu(NO 3 ) 2 and Na 2 S 2 O 3 , it is reasonable to consider that the main CuS formation pathway proceeds firstly via the relatively stable [Cu(S 2 O 3 )(H 2 O) 2 ] and [Cu(S 2 O 3 ) 2 ] 2- complexes formation [21,43]. …”

Section: Resultsmentioning

confidence: 99%

“…Du et al have revealed that shape-controlled hexagonal CuS can be prepared by employing copper acetate and carbon disulphide with toluene and hexadecylamine as assisting agents via a solvothermal process [20]. CuS hexagonal plates were fabricated using CTAB and nitric acid as assisting agent on top of copper (II) chloride and sodium thiosulphate as precursors via a hydrothermal method [21]. Y. Liu et al have synthesized CuS hexagonal plates by applying hexadecylamine, ethanol, potassium ethylxanthate and copper nitrate through a facile solution route [22].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of reaction parameters in hydrothermal synthesis: a strategy towards the formation of CuS hexagonal plates

Auyoong

Yap

Huang

et al. 2013

Chemistry Central Journal

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BackgroundFor decades, copper sulphide has been renowned as the superior optical and semiconductor materials. Its potential applications can be ranged from solar cells, lithium-ion batteries, sensors, and catalyst systems. The synthesis methodologies of copper sulphide with different controlled morphology have been widely explored in the literature. Nevertheless, the understanding on the formation chemistry of CuS is still limited. The ultimate approach undertaking in this article is to investigate the formation of CuS hexagonal plates via the optimization of reaction parameters in hydrothermal reaction between copper (II) nitrate and sodium thiosulphate without appending any assistant agent.ResultsCovellite (CuS) hexagonal plates were formed at copper ion: thiosulphate ion (normalCu2+:S2O32−) mole ratio of 1:2 under hydrothermal treatment of 155°C for 12 hours. For synthesis conducted at reaction temperature lower than 155°C, copper sulphate (CuSO4), krohnite (NaCu2(SO4)(H2O)2] and cyclooctasulphur (S8) were present as main impurities with covellite (CuS). When normalCu2+:S2O32− mole ratio was varied to 1: 1 and 1: 1.5, phase pure plate-like natrochalcite [NaCu2(SO4)(H2O)] and digenite (Cu9S5) were produced respectively. Meanwhile, mixed phases of covellite (CuS) and cyclooctasulphur (S8) were both identified when normalCu2+:S2O32− mole ratio was varied to 1: 2.5, 1: 3 and 1: 5 as well as when reaction time was shortened to 1 hour.ConclusionsCuS hexagonal plates with a mean edge length of 1 μm, thickness of 100 nm and average crystallite size of approximately (45 ± 2) nm (Scherrer estimation) were successfully synthesized via assisting agent- free hydrothermal method. Under a suitable normalCu2+:S2O32− mole ratio, we evidenced that the formation of covellite (CuS) is feasible regardless of the reaction temperature applied. However, a series of impurities were attested with CuS if reaction temperature was not elevated high enough for the additional crystallite phase decomposition. It was also identified that normalCu2+:S2O32− mole ratio plays a vital role in controlling the amount of cyclooctasulphur (S8) in the final powder obtained. Finally, reaction time was recognized as an important parameter in impurity decomposition as well as increasing the crystallite size and crystallinity of the CuS hexagonal plates formed.

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“…These results indicate that the CuS crystal phase is a thermodynamically stable compound in which under a suitable

{normalCu}^{2 +} : S_{2} O_{3}^{2 -}

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of reaction parameters in hydrothermal synthesis: a strategy towards the formation of CuS hexagonal plates

Auyoong

Yap

Huang

et al. 2013

Chemistry Central Journal

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“…Representative transmission electron micrographs of CuS with different morphologies: (a) nanospheres, (b) hollow nanospheres, (c) hexagonal nanoplates, (d) nanorods. Adapted with permission . Copyright 2009, American Chemical Society; Copyright 2009, Elsevier; Copyright 2007, Wiley‐VCH; Copyright 2005, Elsevier.…”

Section: Controlled Synthesis Of Cus Nanoparticlesmentioning

confidence: 99%

“…Since their biomedical applications are not widely explored, we will only briefly describe these nanostructures. The major routes for preparation of CuS nanoplates include hydrothermal/solvothermal methods, which yield nanoplates with edges ranging from 50 to 200 nm depending on the reaction conditions. Most research groups report the treatment of precursor‐surfactant aqueous microemulsions at 130–180 °C for a few hours.…”

Section: Controlled Synthesis Of Cus Nanoparticlesmentioning

confidence: 99%

Synthesis and Biomedical Applications of Copper Sulfide Nanoparticles: From Sensors to Theranostics

Goel

Chen

Cai

2013

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412

277

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Copper sulfide (CuS) nanoparticles have attracted increasing attention from biomedical researchers across the globe, because of their intriguing properties which have been mainly explored for energy- and catalysis-related applications to date. This focused review article aims to summarize the recent progress made in the synthesis and biomedical applications of various CuS nanoparticles. After a brief introduction to CuS nanoparticles in the first section, we will provide a concise outline of the various synthetic routes to obtain different morphologies of CuS nanoparticles, which can influence their properties and potential applications. CuS nanoparticles have found broad applications in vitro, especially in the detection of biomolecules, chemicals, and pathogens which will be illustrated in detail. The in vivo uses of CuS nanoparticles have also been investigated in preclinical studies, including molecular imaging with various techniques, cancer therapy based on the photothermal properties of CuS, as well as drug delivery and theranostic applications. Research on CuS nanoparticles will continue to thrive over the next decade, and tremendous opportunities lie ahead for potential biomedical/clinical applications of CuS nanoparticles.

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“…The initial factor responsible for the final morphology of the products is the crystallographic phase of the seed formed during the nucleation process which depends on the nature of the material and on the environmental conditions [22].…”

Section: Synthesis Proceduresmentioning

confidence: 99%