Generic and Scalable Method for the Preparation of Monodispersed Metal Sulfide Nanocrystals with Tunable Optical Properties

Bera, Abhijit; Mandal, Debranjan; Goswami, Prasenjit N.; Rath, Arup K.; Prasad, Bhagavatula L. V.

doi:10.1021/acs.langmuir.8b00741

Cited by 12 publications

(26 citation statements)

References 51 publications

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“…This is very similar to that of hot injection based methods wherein with increase of metal:S ratio, the excitonic peak was found to red shift with a concomitant peak broadening. 65,81,82 S17 and S18). Therefore, we rule out the possibility that the H 2 S species released by solid state grinding of pure C 8 DTCA acting as sulfur source in the present case.…”

Section: ■ Discussionmentioning

confidence: 99%

“…Our search for a suitable sulfur source lead us to octyl dithiocarbamic acid (C 8 DTCA) which we have previously used to make a library of metal sulfide NCs in a solution based method. 65 The air stable large scale synthesis of C 8 DTCA is a very simple one step process involving the reaction of octylamine with carbon disulfide (Caution: This reaction is exothermic). Here in this report, we employed the metal thiolates as metal source and this C 8 DTCA or C 8 DTCA-OlAm (C 8 DTCA dissolved in few μL of oleylamine) as a sulfur source.…”

Section: ■ Introductionmentioning

confidence: 99%

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Solvent-Less Solid State Synthesis of Dispersible Metal and Semiconducting Metal Sulfide Nanocrystals

Bera

Busupalli

Prasad

2018

ACS Sustainable Chem. Eng.

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Monolayer protected metal and metal sulfide nanocrystals (NCs) have mainly two constituents; the inorganic metal or metal chalcogenide complex as core and organic molecule as shell. Noticing that metal thiolates have these ingredients inbuilt in their structure, we investigated them as possible precursors for the preparation of monolayer protected metal and metal sulfide NCs via solid state grinding method. Accordingly silver and gold NCs have been prepared using a solvent less green approach, by the simple and convenient solid state grinding of the corresponding metal thiolate with sodium borohydride. Similarly, a large variety of uniform-sized semiconducting NCs of metal sulfides including PbS, CdS, ZnS, MnS, Ag2S, and CuS could also be synthesized by the same solid state route by grinding the metal thiolates with octyl dithiocarbamic acid (C8DTCA) and in some cases C8DTCA plus small amount of oleylamine as sulfur source. Interestingly, this simple technique could be used to prepare sub-3 nm NCs like Ag2S, PbS, and CuS which are otherwise difficult to prepare by the conventional high temperature solution routes also. Most gratifyingly, all these NCs, though were prepared by a solvent less grinding method, could be easily dispersed in nonpolar solvents as the preparation method ensued the formation of organic molecule capped NCs.

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Section: ■ Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Solvent-Less Solid State Synthesis of Dispersible Metal and Semiconducting Metal Sulfide Nanocrystals

Bera

Busupalli

Prasad

2018

ACS Sustainable Chem. Eng.

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“…As a class of traditional nanomaterials, discover new features of metal chalcogenides and fabrication of hybridizing metal chalcogenides with other materials have been subjects of intensive studies in recent years. Till now, metal chalcogenides have been used in many fields, such as catalysts,115–123 battery,53,109–111,116–128 optical application,136–139 biomedicine,112,124,140–142 gas and ions storage,103,143–157 etc. Metal chalcogenides‐based hybrid nanostructures are also interesting, like metal chalcogenides coupling with noble metals,55,158–163 oxides,33,93,109,117,124,155,164–193 carbon materials,194–203 etc 204–208.…”

Section: Synthesis Of Metal Chalcogenidesmentioning

confidence: 99%

Optimized Metal Chalcogenides for Boosting Water Splitting

et al. 2020

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splitting (2H 2 O → 2H 2 + O 2 ), consisting of hydrogen evolution and oxygen evolution reaction (HER/OER), can convert electricity to chemical energy in H 2 and O 2 for further energy applications. The practical application of overall water splitting, however, is still limited due to the lack of effective and stable catalysts to reduce reaction energy barrier and enhance Faraday efficient for both reactions. [6][7][8][9][10] Different materials have been studied for overall water splitting catalysis, like metal chalcogenides, metal carbides, oxides, etc. The transition metal carbides, especially graphene, have a better electroconductivity, ductility, and high surface area which display excellent performance in water splitting. [11][12][13] Oxides as another abundant species on the earth also show better water splitting performance, but their stability in hard media is not very good. [14][15][16] The layered double hydroxides (LDH) with unique structure, abundant interstratified electrons and channels for intermediate adsorption and desorption display wonderful water splitting performance. [17][18][19][20] Additionally, the metalorganic frameworks (MOFs) and their based nanocrystals as newly nanomaterials have got much attention in various fields, but their structure limited the active sites exposure for the complete coordinative metal sites. [21][22][23][24][25] Therefore, it is important to enable the cost-effective, large-scale production of these catalysts, and further improve the performance and efficiency of overall water splitting.Transition metal chalcogenides have many different compositions with various lattice structure, while those materials also have unique electronic structures. [26] Based on those superior properties, the transition metal chalcogenides show promising application in many energy applications, [27] such as electrochemical catalysis, photocatalysis, metal-air batteries, and other energy conversion reactions. Especially for their abundant defects sties, [26][27][28] tunable electronic structure, [29][30][31][32] and various morphology, [33][34][35][36][37] the transition metal chalcogenides exhibit boosting performance for water splitting. However, they still have some disadvantages, such as poor conductivity, activity, and stability, in water splitting limited their large-scale industrial application. [38][39][40][41][42] How to synthesize the active and stable transition metal chalcogenides is still a big challenge for wide application. In this Review, the several promising strategies are designed to prepare the active and stable transition metal chalcogenides (Scheme 1). → 2H 2 + O 2 ) is a very promising avenue to effectively and environmentally friendly produce highly pure hydrogen (H 2 ) and oxygen (O 2 ) at a large scale. Different materials have been developed to enhance the efficiency for water splitting. Among them, chalcogenides with unique atomic arrangement and high electronic transport show interesting catalytic properties in various electrochemical reactions, such as the ...

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“…For example, sulfide nanomaterials have experienced rapid development for use in solar cells [6], photodetectors [7, 8], biological imaging [9], and photocatalytic degradation [10]. There are various ways of preparing sulfide QDs, and they can be divided into two main categories, namely, ‘top-down’ and ‘bottom-up’ [11].…”

Section: Introductionmentioning

confidence: 99%

In2S3 Quantum Dots: Preparation, Properties and Optoelectronic Application

Tang

Zhao

et al. 2019

Nanoscale Res Lett

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Low-dimensional semiconductors exhibit remarkable performances in many device applications because of their unique physical, electrical, and optical properties. In this paper, we report a novel and facile method to synthesize In 2 S 3 quantum dots (QDs) at atmospheric pressure and room temperature conditions. This involves the reaction of sodium sulfide with indium chloride and using sodium dodecyl sulfate (SDS) as a surfactant to produce In 2 S 3 QDs with excellent crystal quality. The properties of the as-prepared In 2 S 3 QDs were investigated and photodetectors based on the QDs were also fabricated to study the use of the material in optoelectronic applications. The results show that the detectivity of the device stabilizes at ~ 10 13 Jones at room temperature under 365 nm ultraviolet light irradiation at reverse bias voltage.

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Generic and Scalable Method for the Preparation of Monodispersed Metal Sulfide Nanocrystals with Tunable Optical Properties

Cited by 12 publications

References 51 publications

Solvent-Less Solid State Synthesis of Dispersible Metal and Semiconducting Metal Sulfide Nanocrystals

Solvent-Less Solid State Synthesis of Dispersible Metal and Semiconducting Metal Sulfide Nanocrystals

Optimized Metal Chalcogenides for Boosting Water Splitting

In2S3 Quantum Dots: Preparation, Properties and Optoelectronic Application

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