Nanomaterials & Nanotechnology
Kasturee Hajra; Dipak Maity; Sumit Saha
Abstract
Metal Oxide Nanoparticles (MONPs) have become an important section of nanoparticles, and these nanomaterials have been utilized in different application fields. Thus, it’s very important to understand the major and feasible synthesis methods that are involved during the production of MONPs. In ...
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Metal Oxide Nanoparticles (MONPs) have become an important section of nanoparticles, and these nanomaterials have been utilized in different application fields. Thus, it’s very important to understand the major and feasible synthesis methods that are involved during the production of MONPs. In our review, we are highlighting some major processes for their synthesis and morphology. This review highlights the status, potential, challenges, and feasibility of different processes like sol-gel, CVD, thermal, flame spray, biological synthesis, and other major techniques to synthesize and their applications. Synthesis of nanomaterial through environmentally friendly and greener routes, which greatly impacts different applications, has also been studied as it has received massive attention as a sustainable, feasible, reliable, and cost-effective route in different fields. These artificially created MONPs exhibit distinct physical and chemical characteristics owing to their substantial surface area and nanoscale dimensions. Their exceptional size, shape, and structure further influence their reactivity, resilience, and diverse properties. Thanks to these attributes, they find wide-ranging uses in commercial and domestic applications, such as catalysis, antimicrobial treatments, bio-sensors, electro-sensors, as well as agriculture and various other significant fields. This review paper states major applications of these MONPs have great aspects and potential in the future and will help researchers gain further insights into these fields.
Richa Baronia; Jyoti Goel; Sunil K. Singhal
Abstract
In the fabrication of direct methanol fuel cells (DMFCs) having high performance the essential conditions are (i) the design and construction of a suitable anode electrocatalyst comprising of Pt or a Pt based alloy nanoparticles methanol oxidation reaction (MOR) efficiently and effectively (ii) nature ...
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In the fabrication of direct methanol fuel cells (DMFCs) having high performance the essential conditions are (i) the design and construction of a suitable anode electrocatalyst comprising of Pt or a Pt based alloy nanoparticles methanol oxidation reaction (MOR) efficiently and effectively (ii) nature of support materials onto which these nanoparticles are anchored. In MOR one of the major problems is the adsorption of poisoneous carbonmoxide and other similar intermediates near the active surface of Pt active leading to its deactivation and also the crossover of methanol solution towards the cathodic side. All these factors, therefore, lower the overall electrochemical performance of the electro-catalysts. In the present review paper we report some of our important results of the synthesis of different Pt and Pt based anode electro-catalysts (Pt, PtCo alloys, PtCu alloys) anchored on different support materials such as reduced graphene oxide (rGO), Nitrogen doped rGO and a hybrid of rGO/CNTs for MOR and compared with few of those already reported recently. A detailed characterization of raw materials and the electro-catalysts synthesized in this work is also discussed using XRD, FT-IR, SEM, TEM etc. The electrochemical measurements were made using cyclic voltammetry in acidic medium at room temperature.
H. Kathyayini;N. Nagaraju
Abstract
Al(OH)3 from different sources has been used as supports for a mixture of Fe/Co salts and employed in the synthesis of Multiwall Carbon nanotubes by Catalytic Chemical Vapour Deposition method. These supported-catalysts have been characterized by Scanning Electron Microscopy, Powdered X-ray diffraction, ...
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Al(OH)3 from different sources has been used as supports for a mixture of Fe/Co salts and employed in the synthesis of Multiwall Carbon nanotubes by Catalytic Chemical Vapour Deposition method. These supported-catalysts have been characterized by Scanning Electron Microscopy, Powdered X-ray diffraction, and Thermo gravimetric studies. Surface area was determined by N2 adsorption technique. Carbon nanotubes synthesis reactions have been conducted at 700 o C using acetylene as the hydrocarbon source in N2 atmosphere. The quality and quantity of Multiwall carbon nanotubes depend not only on the carbon source, the textural & structural properties of the support and also their interactions with the active components available on the surface.