Graphene load tungsten trioxide (WO3) nanowire composite material and preparation method thereof
A technology of composite materials and nanowires, applied in the field of graphene-loaded WO3 nanowire composite materials and its preparation, to achieve the effects of cheap reagents, simple formation process, and large-scale preparation
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[0034] Example one:
[0035] (1) Preparation of graphite oxide. Add 2g of graphite powder to a concentrated sulfuric acid solution (15mL) of potassium persulfate (1g) and phosphorus pentoxide (1g) at 80°C, pre-oxidize for 6 hours, then cool to room temperature, filter with suction, and wash until neutral. Add pre-oxidized graphite powder (2g) to 50mL concentrated sulfuric acid solution at 0℃, then slowly add 6g potassium permanganate, then react at 35℃ for 2 hours, and finally slowly add 100mL deionized water and 20mL to the reaction solution The reaction is terminated with 30% hydrogen peroxide. The graphite oxide is prepared by suction filtration, washing, and dialysis. The XRD pattern is shown in figure 2 ;
[0036] (2)WO 3 Preparation of nanowires. Add 3.32g of sodium tungstate to 60mL of distilled water, stir at room temperature for 10 minutes, then slowly add 6mol / L hydrochloric acid dropwise to adjust the pH of the solution to 1.5, then transfer to a 100mL hydrothermal re...
Example Embodiment
[0039] Embodiment two:
[0040] (1) Same as step (1) in implementation example 1;
[0041] (2) Same as step (2) in implementation example 1;
[0042] (3) Preparation of graphite oxide dispersion. Disperse 100 mg of graphite oxide ultrasonically in 70 mL of absolute ethanol for 1.5 hours;
[0043] (4) Combine the WO obtained from step (2) and step (3) 3 The nanowires are mixed with the graphite oxide dispersion, and then transferred to a photocatalytic reactor. The photocatalytic reduction reaction is performed under simulated sunlight for 1.5 hours, filtered, washed, and vacuum dried at 80°C for 12 hours to obtain graphene-supported WO 3 Nanowire nanocomposites.
Example Embodiment
[0044] Embodiment three:
[0045] (1) Same as step (1) in implementation example 1;
[0046] (2) Same as step (2) in implementation example 1;
[0047] (3) Preparation of graphite oxide dispersion. Disperse 200 mg of graphite oxide ultrasonically in 70 mL of absolute ethanol for 1.5 hours;
[0048] (4) Combine the WO obtained from step (2) and step (3) 3 The nanowires are mixed with the graphite oxide dispersion, and then transferred to a photocatalytic reactor. The photocatalytic reduction reaction is performed under simulated sunlight for 1.5 hours, filtered, washed, and vacuum dried at 80°C for 12 hours to obtain graphene-supported WO 3 Nanowire nanocomposites.
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