- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Growth and characterization of hybrid (HoGO/P3HT) graphene-based nanostructures for photovoltaic (PV) applications.
摘要： Herein, we present a comparative study between nanostructures of poly(3-hexylthiophene) (P3HT), Holmium-Graphene Oxide (HoGO) nanocomposite and hybrid HoGO/P3HT thin-film nanostructures in terms of structural, morphological and spectroscopic properties. Specifically, the graphene based GO nanostructure was functionalized with rear earth ion Ho(III) to improve its mobility. Furthermore, semiconducting P3HT nanostructure was successfully grown with HoGO nanocomposite creating hybrid HoGO/P3HT nanostructure for energy materials. The nanostructures were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), (FTIR) and UV/VIS/NIR spectroscopy. The interaction between HoGO and HoGO/P3HT nanostructures is evidenced through substantial variations in nanoparticle morphologies. FTIR results provided the evidence of the presence of different types of carbon functionalities in the nanostructures. From the absorption spectra, growth of hybrid HoGO/P3HT nanostructure broadened the absorbance with a slight decrease in %. These nanostructures open a promising direction on growth of hybrids for photovoltaic applications because of their interesting optical properties.
关键词： nanostructures,Hybrid,nanocomposite,thin-film,photovoltaics
更新于2025-10-22 19:40:53
-
A novel approach to synthesize nanostructured WO3 and graphene/WO3 nanocomposites: Structural and morphological investigations
摘要： Nanostructured metal oxide based nanocomposites have attracted considerable attention due to their promising and remarkable properties. In the present study, a novel method is developed for the preparation of Graphene oxide (GO)/tungsten oxide WO3 nanocomposites by using tungsten carbide (WC) and graphite as precursors. (GO)/WO3 nanocomposites are prepared via in situ and ex situ chemical approaches followed by subsequent thermal treatment at 500 °C. The obtained samples were characterized by di?erent techniques to con?rm the transformation of WC to WO3 nanostructures and the formation of their nanocomposites with carbon nanostructures. X-ray di?raction (XRD) analysis indicates that the WO3 nanoparticles were ?ne crystallized with a monoclinic phase even after interaction with GO for the ex situ prepared GO/WO3 and di?erent phases of WO3 appeared during their growth in situ in the presence of graphite. Scanning electron microscopy (SEM) images reveal the rods-like shape of WO3 nanostructures with uniform distribution onto the RGO nanosheets. Fourier transform infrared (FTIR) spectroscopy con?rms the interaction and charge transfer between the components. The experimental results reveal the e?ciency of the proposed approach that opens up a promising route to prepare G/WO3 nanocomposites for many applications.
关键词： Graphene,Hybrid nanocomposite,Tungsten oxide
更新于2025-09-23 15:23:52
-
Laser-induced graphene hybrid photoelectrode for enhanced photoelectrochemical detection of glucose
摘要： The combination of electrocatalyst with semiconductor light-absorber is of great importance to increase the efficiency of photoelectrochemical (PEC) glucose detection. Here, in-situ and synchronous fabrication of Ni-based electrocatalyst (NiEC) and CdS semiconductor in laser-induced graphene (LIG) on indium?tin oxide glass is demonstrated via a one-step laser-induced solid phase transition. A series of component and structural characterizations suggest that the laser-induced NiEC uniformly disperses in the hybrid nanocomposite and exists mainly in the form of Ni0 and NiO state. Moreover, both electrochemical and PEC investigations confirm that the as-prepared hybrid photoelectrode exhibits excellent photoelectrocatalytic ability towards glucose, which is not only attributed to the strong synergistic interaction between CdS and NiEC, but also benefited from the high conductivity as well as 3D macroporous configuration of the simultaneously formed LIG, providing the key factor to achieve sensitive non-enzymatic PEC glucose sensors. Therefore, the laser-induced hybrid photoelectrode is then applied to the PEC detection of glucose, and a low detection limit of 0.4 μM is obtained with good stability, reproducibility, and selectivity. This study provides a promising paradigm for the facile and binder-free fabrication of electrocatalyst?semiconductor?graphene hybrid photoelectrode, which will find potential applications in sensitive PEC biosensing for a broad range of analytes.
关键词： nickel electrocatalyst,hybrid nanocomposite,cadmium sulfide,photoelectrochemical sensing,laser-induced graphene,glucose
更新于2025-09-23 15:19:57
-
Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation
摘要： Matrix-assisted pulsed laser evaporation (MAPLE) was used to deposit hybrid nanocomposite thin films based on cobalt phthalocyanine (CoPc), C60 fullerene and ZnO nanoparticles. The inorganic nanoparticles, with a size of about 20 nm, having the structural and optical properties characteristic of ZnO, were chemically synthesized by a simple precipitation method. Furthermore, ZnO nanoparticles were dispersed in a dimethyl sulfoxide solution in which CoPc and C60 had been dissolved, ready for the freezing MAPLE target. The effect of the concentration of ZnO nanoparticles on the structural, morphological, optical and electrical properties of the CoPc:C60:ZnO hybrid nanocomposite layers deposited by MAPLE was evaluated. The infrared spectra of the hybrid nanocomposite films confirm that the CoPc and C60 preserve their chemical structure during the laser deposition process. The CoPc optical signature is recognized in the ultraviolet–visible (UV–Vis) spectra of the obtained layers, these being dominated by the absorption bands associated to this organic compound while the ZnO optical fingerprint is identified in the photoluminescence spectra of the prepared layers, these disclosing the emission bands linked to this inorganic semiconductor. The hybrid nanocomposite layers exhibit globular morphology, which is typical for the thin films deposited by MAPLE. Current-voltage (J-V) characteristics of the structures developed on CoPc:C60:ZnO layers reveal that the addition of an appropriate amount of ZnO nanoparticles in the CoPc:C60 mixture leads to a more efficient charge transfer between the organic and inorganic components. Due to their photovoltaic effect, structures featuring such hybrid nanocomposite thin films deposited by MAPLE can have potential applications in the field of photovoltaic devices.
关键词： cobalt phthalocyanine,photovoltaic effect,hybrid nanocomposite films,MAPLE,ZnO nanoparticles
更新于2025-09-19 17:13:59
-
High-gravity-assisted scalable synthesis of zirconia nanodispersion for light emitting diodes encapsulation with enhanced light extraction efficiency
摘要： Zirconia-based hybrid polymers has become one of the ideal encapsulation material for light emitting diodes (LEDs) with high extraction efficiency due to their proper refractive index to those of semiconductor chips. However, the controlling of the dispersion for zirconia nanoparticles in polymeric hosts to obtain optically transparent hybrid nanocomposites has been one of the major challenges. Herein, we reported the synthesis of zirconia nanodispersion via high-gravity-assisted homogeneous precipitation in an internal circulation rotating packed bed (RPB) reactor followed by two-step modification. An alternative to conventional precipitation in batch stirred tank reactors (STR), the process intensification by high-gravity RPB results in homogeneous micromixing during the nucleation and growth of zirconia particles, which are benefit for continuous and reproducible production of ultrasmall zirconia nanoparticles. The obtained zirconia nanoparticles are purely cubic phase with narrow size-distribution in the range of 3–5 nm according to the X-ray diffraction and transmission electron microscopy characterization, which were similarity to that by the conventional methods. Nevertheless, the average hydrodynamic diameters of zirconia nanoparticles in aqueous solutions obtained by RPB methods were much smaller than those prepared in conventional STR, which enabled easy control and surface modification for highly dispersed nanodispersion in organic solvents and/or polymeric hosts. After two-step surface modification, zirconia nanoparticles with goal-directed structures were obtained, with highly dispersity in various organic solvents (e.g. toluene, trichloromethane, tetrahydrofuran, etc.) and aliphatic epoxy resin, forming transparent hybrid films with tunable refractive indexes. The preliminary applications of these zirconia nanodispersions for LEDs encapsulation were demonstrated. The light extraction efficiency of the LEDs devices packaged with zirconia/epoxy hybrid material increased by 10 percent when the doping content of zirconia nanoparticles was 0.2, compared to the devices encapsulated by original epoxy.
关键词： Rotating packed bed,Hybrid nanocomposite,Zirconia nanoparticles,LED encapsulation
更新于2025-09-09 09:28:46