“…Each has its advantages and shortcomings, but AACVD has several benefits over the others mentioned earlier. The foremost advantage of AACVD is the control on physicochemical properties, such as the morphology of nanomaterials can be tuned by varying the temperature, solvent, substrate, or growth time 31 during the deposition process. In addition, AACVD facilitates the direct deposition of nanostructured materials on the conducting substrate, that is, Ni-Foam.…”
Fabrication
of effective and low-cost electrocatalysts for water
splitting is critical to sustainable energy-conversion technologies.
We report the synthesis of nickel sulfide (NiS) nanoflakes by aerosol-assisted
chemical vapor deposition (AACVD) on Ni foam. Upon electrochemical
measurements, NiS nanoflake films exhibit excellent oxygen evolution
reaction (OER) activity and stability in basic solutions, advancing
an attractive alternative to precious metals and other transition-metal
catalysts that have been extensively investigated. The NiS@Ni-Foam
prepared at 350 °C offered a high current density of 1100 mA/cm2 at an overpotential of 450 mV with a Tafel slope of 81.3
mV/dec. Furthermore, it remained durable at a constant current for
>15 h in 1 M KOH solution. The high OER activity of NiS@Ni-Foam
prepared
at 350 °C is due to the nanoflake-like morphology and crystalline
structure, as observed under scanning electron microscopy (SEM), high-resolution
transmission electron microscopy (HR-TEM), and X-ray diffraction (XRD).
Likewise, NiS@Ni-Foam prepared at 350 °C provided a high specific
surface area for facile ion transport, charge transfer, and enormous
electrochemical active sites. Hence, it collectively resulted in enhanced
water splitting oxygen evolution reaction (OER).
“…Each has its advantages and shortcomings, but AACVD has several benefits over the others mentioned earlier. The foremost advantage of AACVD is the control on physicochemical properties, such as the morphology of nanomaterials can be tuned by varying the temperature, solvent, substrate, or growth time 31 during the deposition process. In addition, AACVD facilitates the direct deposition of nanostructured materials on the conducting substrate, that is, Ni-Foam.…”
Fabrication
of effective and low-cost electrocatalysts for water
splitting is critical to sustainable energy-conversion technologies.
We report the synthesis of nickel sulfide (NiS) nanoflakes by aerosol-assisted
chemical vapor deposition (AACVD) on Ni foam. Upon electrochemical
measurements, NiS nanoflake films exhibit excellent oxygen evolution
reaction (OER) activity and stability in basic solutions, advancing
an attractive alternative to precious metals and other transition-metal
catalysts that have been extensively investigated. The NiS@Ni-Foam
prepared at 350 °C offered a high current density of 1100 mA/cm2 at an overpotential of 450 mV with a Tafel slope of 81.3
mV/dec. Furthermore, it remained durable at a constant current for
>15 h in 1 M KOH solution. The high OER activity of NiS@Ni-Foam
prepared
at 350 °C is due to the nanoflake-like morphology and crystalline
structure, as observed under scanning electron microscopy (SEM), high-resolution
transmission electron microscopy (HR-TEM), and X-ray diffraction (XRD).
Likewise, NiS@Ni-Foam prepared at 350 °C provided a high specific
surface area for facile ion transport, charge transfer, and enormous
electrochemical active sites. Hence, it collectively resulted in enhanced
water splitting oxygen evolution reaction (OER).
“…Even today, CVD remains one of the fascinating techniques in the microelectronics sector and is accomplished at overcoming the challenges that existing technologies entail. [23,24] With this method, Nanomaterials are produced by using relatively simple ingredients. The fundamental idea of this technique is to inject the vapor of a gaseous or liquid reactant, including chemicals and other gases required for the reaction, into the reaction chamber.…”
Nanomaterials have distinguished themselves as an outstanding class of materials with at least one dimension falling between 1 and 100 nm. The logical design of nanoparticles allows exceptionally high surface area. It is possible to create nanomaterials with exceptional magnetic, electrical, mechanical, optical, and catalytic capabilities that differ significantly from their bulk counterparts. By carefully regulating the size, shape, synthesis conditions, and appropriate functionalization, the properties of nanomaterials can be tailored to meet specific needs. This chapter highlights the particular characteristics of nanomaterials. We specifically outline and define terminologies associated with nanomaterials. The discussion covers a range of nanomaterial synthesis techniques, including top-down and bottom-up methods.
“…In the former, single or small clusters of molecules are utilized as the building block for producing NPs with controlled shape and size. For example, the chemical vapor deposition method is widely used for this purpose [11]. Generally, a gas reactant passes through a substrate where the nanoparticles layers are formed due to heterogenous reactions [12].…”
Section: Introduction 1the Challenge Of Nanoparticle Characterizationmentioning
Metallic nanoscale particles attract a growing interest in several fields, thanks to their unique bonding characteristics; applications are appearing in the literature in the fields of, for example, sensor coatings and biochemical compound detection. However, the controlled fabrication of such nanopowders is often cumbersome, especially because their characterization is normally slow, involving procedures such as electron microscopy. On the other hand, microwave sensors based on near-field effects on materials are being developed with high sensitivity and show promising characteristics. In this paper, the authors show how a microwave sensor based on a Square Spiral Resonator can be used to characterize paraffin dispersions of nanoparticles conveniently and cost-effectively.
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