Violet Tungsten Oxide Patent
W18O49-Type Tungsten Oxide Nanomaterial and Applications Thereof in Light Sensor, Mosfet and Solar Cell US 20150075594 A1
The invention proposes W18O49-type tungsten oxide nanomaterial, which is fabricated with a precursor comprising WS2 and formed by thermal oxidation from the precursor. Applications using W18O49-type tungsten oxide nanomaterial in light sensor, MOSFET and solar cell, are also disclosed.
Preparation Method for W18O49 Ultrafine Nanowire CN 103818964 A
The invention discloses a preparation method for a W18O49 ultrafine nanowire. The preparation method has good repeatability and comprises the following steps: a) dissolving WCl6 in triglycol and carrying out magnetic stirring so as to form a blue WCl6 solution; b) transferring the obtained WCl6 solution to a stainless steel hydro-thermal reaction vessel with a polytetrafluoroethylene inner liner, sealing the reaction vessel, carrying out a solvothermal reaction at a temperature of 140 to 200 DEG C for 5 h and subjecting the reaction vessel to natural cooling; and c) subjecting products to centrifugation, carrying out repeated washing with deionized water and absolute ethyl alcohol and then carrying out thorough drying in an air atmosphere at a temperature of 90 DEG C so as to prepare the W18O49 ultrafine nanowire. According to the invention, WCl6 is used as a precusor, triglycol with a high flash point, low vapor pressure, insusceptibility to combustion and blast and extremely low toxicity is used as a solvent, and a solvothermal process is carried out to prepare the W18O49 ultrafine nanowire with a diameter of 0.6 mm; the method has the advantages of easiness, practicability, simple equipment, environment friendliness, good repeatability, high yield and a wide application scope; the prepared W18O49 ultrafine nanowire has controllable morphology and is applicable to fields like gas-sensitive materials, sensors and photo-detectors.
Method for Preparing Me/W18O49 Supported Catalyst by Oriented Deposition of Noble Metals by Virtue of Self Reduction Method CN 104549267 A
The invention discloses a method for preparing a Me/W18O49 supported catalyst by oriented deposition of noble metals by virtue of a self reduction method and belongs to the field of preparation of supported catalyst materials. The method is characterized by comprising the following steps: mixing a tungsten source with anhydrous ethanol, and ultrasonically stirring; transferring into a reaction kettle, and reacting at 180 DEG C for 24 hours to obtain W18O49; centrifuging, washing and drying the prepared self-reduction W18O49; mixing the product with anhydrous ethanol; performing ultrasonic treatment for 30 minutes; adding a novel metal solution; performing ultrasonic treatment for 30 minutes; magnetically stirring for 12 hours; and washing and centrifuging to obtain the supported catalyst. According to the technical scheme, the self reduction method is adopted, and other reducing agents are not added in a supporting process, so that the method disclosed by the invention has selectivity of oriented deposition, and the prepared supported catalyst has a relatively high noble metal atom yield.
Preparation Method of Self-Assembly W18O49 Nanostructure CN 103570070 A
The invention provides a preparation method of a self-assembly W18049 nanostructure. The preparation method is characterized by comprising the following steps: weighing WC16 and ZnCl2; dissolving the WC16 and the ZnCl2 into a mixed solvent of ethanol and polyethylene glycol 400; transferring into a reaction kettle, and reacting under the condition of 160-220 DEG C for 18-24 hours; centrifugalizing; carrying out solid-liquid separation; and washing to obtain a solid, namely the self-assembly W18049 nanostructure. The preparation method provided by the invention can be used for preparing the self-assembly W18049 nanostructure by taking a common precursor as a raw material and using a simple experiment device; the prepared self-assembly W18049 nanostructure ranges from 700 micrometers to 1.4 micrometers on structural size and comprises nanometer bundles of 5-20 nanometers. The self-assembly W18049 nanostructure provided by the invention can be well dispersed in water and achieves very high absorption in a near-infrared region; the prepared self-assembly W18049 nanostructure is expected to be used for the fields of photoelectricity, nano-biology and the like.
Preparation Method of Copper Modified Violet Tungsten Oxide Photocatalyst CN 104785275 A
The invention discloses a copper modified violet tungsten oxide photocatalyst material. Copper with a proper concentration is doped, and the copper ions can enter crystal lattices of violet tungsten oxide and introduced into defect positions, so as to influence composition of electrons and electron holes, and under the proper concentration achieve the optimal catalysis effect. Meanwhile, the invention discloses a preparation method of the catalyst material. The copper doped violet tungsten oxide powder is synthesized by a solution method, so that the preparation method is short in reaction time and low in reaction triggering temperature; the obtain nanocrystalline catalyst powder is 30-200 nm in diameter and 1-3 microns in length. The copper modified violet tungsten oxide photocatalyst material and the preparation method thereof disclosed by the invention solve the problem that the photocatalytic performance is remarkably improved by the method of appropriate doping to introduce the defect; the prepared photocatalyst powder has the advantages of being fine in crystalline grain, low in cost, high in raw material powder utilization ratio, high in photocatalytic efficiency and the like.
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