How to prepare ZnO nanorods?
The ZnO nanorod array was fabricated by dissolving 10 ml Zn(Ac)2·2H2O in 0.1 M methanol and 20 ml NaOH in 0.5 M methanol solution. After filtration, the solution was transferred to a 50 ml autoclave and heat treated for 24 h at 150°C. The precipitates were collected and washed.
What is ZnO and tio2?
Abstract. Titanium dioxide (TiO2) and zinc oxide (ZnO) nanostructures have been widely used as photo-catalysts due to their low-cost, high surface area, robustness, abundance and non-toxicity.
What is hydrothermal method for nanoparticle synthesis?
Hydrothermal synthesis is one of the most commonly used methods for preparation of nanomaterials. It is basically a solution reaction-based approach. In hydrothermal synthesis, the formation of nanomaterials can happen in a wide temperature range from room temperature to very high temperatures.
How do you make ZnO nanoparticles?
ZnO nanoparticles were prepared by refluxing precursor zinc acetate dihydrate (0.1 M) in diethylene glycol and triethylene glycol at 180 °C and 220 °C respectively. Reaction time varied for 2 and 3 h with and without sodium acetate (0.01 M).
How is ZnO prepared?
In the indirect (French) process, metallic zinc is melted in a furnace and vaporized at ca. 910 °C. The immediate reaction of the zinc vapour with oxygen from the air produces ZnO. The particles of zinc oxide are transported via a cooling duct and are collected at a bag filter station.
What is ZnO used for?
Zinc oxide is an inorganic compound used in a number of manufacturing processes. It can be found in rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes.
What is avobenzone made of?
Avobenzone exists in the ground state as a mixture of the enol and keto forms, favoring the chelated enol. This enol form is stabilized by intramolecular hydrogen-bonding within the β-diketone.
What is sol-gel method for nanoparticle synthesis?
The sol-gel process is a more chemical method (wet chemical method) for the synthesis of various nanostructures, especially metal oxide nanoparticles. In this method, the molecular precursor (usually metal alkoxide) is dissolved in water or alcohol and converted to gel by heating and stirring by hydrolysis/alcoholysis.
What is co precipitation method for nanoparticle synthesis?
Coprecipitation is a very facile and convenient way to synthesize iron oxide nanoparticles (either Fe3O4 or γ-Fe2O3) from aqueous Fe2+/Fe3+ salt solutions by the addition of a base under inert atmosphere at room temperature or at elevated temperature.
How do you synthesis ZnO?
ZnO nanoparticles were synthesized via sol gel method using Zinc acetate dehydrate (Zn(CH3COO)2. 2H2O) as a precursor and ethanol (CH2COOH) was used as solvent, Sodium hydroxide (NaOH) and distilled water were used as medium. ZnO nanoparticles were characterized by using XRD, EDX, FESEM, and nano-particles analyser.
What is ZnO chemistry?
Zinc oxide (ZnO) is a common inorganic compound with a large number of uses. It is insoluble in water but soluble in dilute acids and bases. Its melting point is extremely high—1975 ºC, where it also decomposes.
Why is ZnO insoluble in water?
Water gives a very very very small concentration of aqueous H+ ions, so it tends not to react (or only very very slowly) with Zn — so under ordinary conditions Zn can be considered non-reactive with and insoluble in water.