Energy harvesting and energy storage are two critical aspects of supporting the energy transition and sustainability. Many studies have been conducted to achieve excellent performance devices for these two purposes. As energy-storing devices, supercapacitors (SCs) have tremendous potential to be applied in several sectors.
View Article and Find Full Text PDFDespite being one of the most promising materials in anode materials, molybdenum sulfide (MoS ) encounters certain obstacles, such as inadequate cycle stability, low conductivity, and unsatisfactory charge-discharge (CD) rate performance. In this study, a novel approach is employed to address the drawbacks of MoS . Carbon polymer dots (CPDs) are incorporated to prepare three-dimensional (3D) nanoflower-like spheres of MoS @CPDs through the self-assembly of MoS 2D nanosheets, followed by annealing at 700 °C.
View Article and Find Full Text PDFRegulating the transfer pathway of charge carriers in heterostructure photocatalysts is of great importance for selective CO photoreduction. Herein, the charge transfer pathway and in turn the redox potential succeeded to regulate in 2D MoS /1D TiO heterostructure by varying the light wavelength range. Several in situ measurements and experiments confirm that charge transfer follows either an S-scheme mechanism under simulated solar irradiation or a heterojunction approach under visible light illumination, elucidating the switchable property of the MoS /TiO heterostructure.
View Article and Find Full Text PDFThe hydrothermal dissolution-recrystallization process is a key step in the crystal structure of titania-based nanotubes and their composition. This work systematically studies the hydrothermal conditions for directly synthesizing anatase TiO nanotubes (ATNTs), which have not been deeply discussed elsewhere. It has been well-known that ATNTs can be synthesized by the calcination of titanate nanotubes.
View Article and Find Full Text PDFHydrogen (H ) is known as the key player in the alternative and renewable energy revolution and henceforth H production, transportation, storage and usage have been a major interest of current research. However, due to severe safety concerns, strategies are indispensable to devise superior H sensors, particularly selective and sensitive H sensors. In this personal account, three specific gas sensing constructs; zinc oxide (ZnO) nanostructures-, noble metal nanoparticles-decorated ZnO- and noble metal nanoparticles-decorated ZnO nanostructures on reduced graphene oxide (rGO)-based H sensors have been demonstrated.
View Article and Find Full Text PDFThe dimension of plasmonic nanostructures does matter in localizing electromagnetic (EM) field and improving surface-enhanced Raman scattering (SERS) activity. Zero-dimensional (0D), one-dimensional (1D) and two-dimensional (2D) plasmonic nanostructures are promising candidates to validate SERS enhancement and the mechanisms thereof. In this work, silver (Ag) nanoparticles (NPs), nanoneedles (NNs) and nanorings (NRs) have been considered to demonstrate the impact of EM near-field distributions on SERS of the corresponding 0D ( Ag-NPs), 1D ( Ag-NNs) and 2D ( Ag-NRs) nanostructures.
View Article and Find Full Text PDFA simple and hands-on one-step process has been implemented to fabricate polymer-templated hydrophobic nanostructures as hydrogen gas sensing platforms. Topographic measurements have confirmed irregular hills and dips of various dimensions that are responsible for creating air bubble pockets that satisfy the Cassie-Baxter state of hydrophobicity. High-resolution field-emission scanning electron microscopy (FESEM) has revealed double-layer structures consisting of fine microscopic flower-like structures of nanoscale petals on the top of base nanostructures.
View Article and Find Full Text PDFOxynitride glasses are not yet commercialised primarily due to the impurities present in the network of these glasses. In this work, we investigated the microstructure and instinctive defects in nitrogen rich La-Si-O-N glasses. Glasses were prepared by heating a powder mixture of pure La metal, SiN, and SiO in a nitrogen atmosphere at 1650-1800 °C.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
December 2021
Plasmonic nanostructures, particularly irregular surfaces of ring-like silver (Ag) nanostructures are promising candidates in surface-enhanced Raman scattering (SERS) spectroscopy. In this work, clusters-based Ag nanorings have been fabricated and characterized as SERS-active substrates. The rim of the as-fabricated Ag nanorings was found neither discontinuous nor linear aggregation of nanoparticles.
View Article and Find Full Text PDFA new route has been developed to design plasmonic pollen grain-like nanostructures (PGNSs) as surface-enhanced Raman scattering (SERS)-active substrate. The nanostructures consisting of silver (Ag) and gold (Au) nanoparticles along with zinc oxide (ZnO) nanoclusters as spacers were found highly SERS-active. The morphology of PGNSs and those obtained in the intermediate stage along with each elemental evolution has been investigated by a high-resolution field emission scanning electron microscopy.
View Article and Find Full Text PDFTransparent and amorphous yttrium (Y)/Sialon thin films were successfully fabricated using pulsed laser deposition (PLD). The thin films were fabricated in three steps. First, Y/Sialon target was synthesized using spark plasma sintering technique at 1500 °C in an inert atmosphere.
View Article and Find Full Text PDFA simple, eco-friendly, and biomimetic approach using Thymus vulgaris (T. vulgaris) leaf extract was developed for the formation of ZnO-Ag nanocomposites (NCs) without employing any stabilizer and a chemical surfactant. T.
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