A kind of tungsten oxide monolayer nanosheet and its preparation method and application
A tungsten oxide monolayer and nanosheet technology, applied in tungsten oxide/tungsten hydroxide, nanotechnology, electrolytic components, etc., to achieve the effects of easy implementation, low energy consumption, and simple synthesis process
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Embodiment 1
[0053] A kind of WO 3 ·H 2 O. WO 3 A method for preparing a single-layer nanosheet, comprising the steps of:
[0054] Preparation of metatungstate anion intercalation LDHs complex by ion exchange method:
[0055] Take 10.2g Mg(NO 3 ) 2 ·6H 2 O and 7.6g Al(NO 3 ) 3 9H 2 O was dissolved in 200ml deionized water to obtain solution A. Take 6.4g NaOH and dissolve in 100ml deionized water to obtain solution B. Solutions A and B were simultaneously added dropwise to 50 ml of degassed deionized water C under stirring conditions, and the pH was controlled to be 10.0 under nitrogen protection. After stirring at room temperature for 30 min, it was aged in an oven at 80° C. under nitrogen protection for 12 h. After filtration, washing, and vacuum drying at 60°C for 12 hours, NO 3 - Intercalated LDHs. Weigh 5.0g of prepared LDHs and 5.0g of ammonium metatungstate into 100ml of degassed deionized water, N 2 Under protection, stir at 40°C for 24h. After filtration, washing an...
Embodiment 2
[0065] A kind of WO 3 ·H 2 O. WO 3 A method for preparing a single-layer nanosheet, comprising the steps of:
[0066] Metatungstate anion-intercalated LDHs composites were prepared by structural reconstruction method.
[0067] Take 100ml deionized water, 6.8g Mg(NO 3 ) 2 ·6H 2 O, 5.0g Al(NO 3 ) 3 9H 2 O and 8g of urea were added to a three-necked flask, stirred at room temperature for 0.5h to dissolve the solid, and refluxed in an oil bath at 90°C for 24h. After filtering, washing, and drying at 60°C for 12 hours, CO 3 2― Intercalated LDHs. The prepared LDHs were calcined in a muffle furnace at 400 °C for 2 h to obtain MMO templates. Weigh 5.0g of MMO and 5.0g of ammonium metatungstate, put them into 100ml of degassed deionized water, and stir for 24h under the protection of nitrogen, with the temperature kept at 40°C. Then the dispersion was filtered, washed, and dried at 60°C for 12 hours to obtain the metatungstate anion-intercalated LDHs complex.
[0068] 5 g...
Embodiment 3
[0071] A kind of WO 3 ·H 2 O. WO 3 A method for preparing a single-layer nanosheet, comprising the steps of:
[0072] The preparation of the metatungstate anion intercalation LDHs complex is as described in Example 1;
[0073] 5 g of AMT anion intercalation LDH composite powder was placed in a tube furnace, heated to 300 °C for 1 h in an air atmosphere, and calcined at a heating rate of 5 °C / min. After natural cooling to room temperature, WO 3 / MMO complex. Take 2g WO 3 / MMO complex was added to 100ml 0.5mol / L sulfuric acid, stirred at room temperature for 12h, then filtered, washed with water, and freeze-dried for 10h to obtain WO 3 ·H 2 O monolayer nanosheets.
[0074] The above obtained WO 3 ·H 2 O monolayer nanosheets placed in a tube furnace, N 2 Under protection, the temperature was raised to 280°C for 1h and the heating rate was 2°C / min to obtain WO 3 monolayer nanosheets.
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