Colloidal InSe nanostructures: Effect of morphology on their chemical sensitivity to methanol and formaldehyde fumes

Airo, Mildred; Rodrigues, Rafael; Gqoba, Siziwe; Ntholeng, Nthabiseng; Otieno, Francis; Moloto, Makwena J.; Greenshields, Márcia W. C. C.; Hümmelgen, Ivo A.; Moloto, Nosipho

doi:10.1016/j.snb.2016.05.150

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…71 This electron mobility is higher than those achieved by other high mobility 2D semiconducting materials, including MoS 2 . Based on its properties, 2D InSe has been used in photovoltaic devices, 72,73 as well as for (photo)electrochemical water splitting reactions, 64 photodetectors, 63,74 sensors, 75 thermoelectric devices, 76 and spintronic devices. 77 Overall, the above discussed TMCs represent interesting 2D materials for the engineering of the perovskite/ETL interface, aiming at improving the device PCE.…”

Section: Introductionmentioning

confidence: 99%

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Tsikritzis,

Chatzimanolis,

Tzoganakis

et al. 2024

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Tsikritzis,

Chatzimanolis,

Tzoganakis

et al. 2024

Sustainable Energy Fuels

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“…Colloidal synthesis of other 2D nanomaterials is relatively simpler. The Moloto group has fabricated several 2D nanomaterials including InSe, In 2 S 3 , AuSe, MoSe 2 and WS 2 among many others using the colloidal method of synthesis [17–21] . This method also provided the Moloto group an avenue to fabricate hierarchical nanostructures in the form of nanoflowers of MoSe 2, NbSe 2 and WS 2 by varying the reaction parameters.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Synthesis of Zirconium Disulphide Nanostructures and their Stability Against Oxidation

et al. 2022

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The need to exploit the exotic properties of ZrS2 synthesized via colloidal means is imperative. For almost a decade now there has been no literature on the colloidal synthesis of ZrS2 nanomaterials. Meanwhile, several publications are available on other methods of synthesis mostly chemical vapour transport (CVT) and chemical vapour deposition (CVD). The synthesized bulk material from the CVT method is further subjected to exfoliation (mechanical or liquid) to obtain mono or few‐layers of ZrS2. With the colloidal method, there is a possibility of the oxide being formed during the synthesis of ZrS2 and likely destabilization of the nanomaterial after synthesis on exposure to ambient environment. In this study, both the heat up and hot injection methods were employed to fabricate various morphologies of ZrS2 nanomaterials. The metal and sulphur precursors were dissolved in a mixture of octadecene (ODE) and oleic acid (OA); and refluxed at a temperature of 290 °C in the presence of nitrogen gas. ODE served the role of non‐coordinating solvent, while OA served as the capping agent. Nanorods, nanospheres and nanosheets were obtained from the heat up method. Meanwhile, the hot injection approach produced nanosheets and nanospheres with well noticeable hollow centres. Powder X‐ray diffractometer (PXRD) validated the formation of the ZrS2 hexagonal phase with traces of oxides of zirconium, ZrO2. The peak of S2p was conspicuously absent while the Zr3d peak was well noticeable in the XPS spectra. XPS and EDS measurements confirmed the replacement of the sulphur atom by the O atom on the surface of the nanomaterials. Only one exciton peak was observed for the absorption spectra from both the heat up and hot injection methods; and thermal thermogravimetry analysis (TGA) revealed three plateaux of decomposition of the nanomaterials.

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“…2D layered materials such as MoSe 2 are quickly becoming some of the most exciting materials, with interesting properties that have put them at the forefront for use in various applications and technologies including energy storage and generation devices, field-effect transistors and biosensors [ 1 , 2 , 3 ]. MoSe 2 is a layered transition metal dichalcogenide (TMD) material where each layer is comprised of atom-thin layers of transition metal sandwiched between two chalcogen layers.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction

et al. 2020

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Herein we report on the use of different metal precursors in the synthesis of MoSe2 nanomaterials in order to control their morphology. The use of Mo(CO)6 as the metal precursor resulted in the formation of wrinkled few-layer nanosheets, while the use of H2MoO4 as the metal precursor resulted in the formation of nanoflowers. To investigate the effect of the morphologies on their performance as catalysts in the hydrogen evolution reaction, electrochemical characterization was done using linear sweep voltammetry (LSV), cyclic voltammetry (CV), and electrical impedance spectroscopy (EIS). The MoSe2 nanoflowers were found to have superior electrochemical performance towards the hydrogen evolution reaction with a lower Tafel slope, on-set potential, and overpotential at 10 mA/cm2 compared to the wrinkled few-layer nanosheets. This was found to be due to the higher effective electrochemical surface area of the nanoflowers compared to the nanosheets which suggests a higher number of exposed edge sites in the nanoflowers.

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Colloidal InSe nanostructures: Effect of morphology on their chemical sensitivity to methanol and formaldehyde fumes

Cited by 7 publications

References 24 publications

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Engineering of the perovskite/electron-transporting layer interface with transition metal chalcogenides for improving the performance of inverted perovskite solar cells

Colloidal Synthesis of Zirconium Disulphide Nanostructures and their Stability Against Oxidation

Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction

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