Cavity core-shell structured TiO2/WO3 composite photocatalyst and preparation method therefor and application thereof
A core-shell structure and catalyst technology, which is applied in the field of preparing hollow core-shell structure TiO2/WO3 composite photocatalysts, can solve the problems of complicated procedures and complicated methods, and achieve strong photocatalytic oxidation, high separation efficiency and controllability strong effect
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[0023] Example 1
[0024] Under water bath conditions, add 140uL (1.27mmol) of titanium tetrachloride to 20mL of tert-butanol and 20mL of ethylene glycol. Stir vigorously until the titanium tetrachloride is completely dissolved to form a transparent solution. Add 1.0g of tungsten hexachloride (2.52 mmol) was dissolved in 50mL of absolute ethanol, then the above mixed solution was transferred to a 100mL polytetrafluoroethylene kettle (about 90% of the kettle volume), kept at 160℃ for 48h, then cooled to room temperature naturally, and then centrifuged and washed. TiO with cavity core-shell structure 2 / WO 3 Composite photocatalyst.
[0025] Test results: The morphology of the prepared catalyst is a core-shell structure with a cavity. The spherical outer surface grows needle-like structures with small particles attached. The core-shell sphere diameter is about 1-2um, the cavity diameter is about 200nm, and the specific surface of the catalyst is about 189m. 2 / g, the morphology is mo...
Example Embodiment
[0026] Example 2
[0027] Under water bath conditions, add 140uL (1.27mmol) of titanium tetrachloride to 30mL of tert-butanol and 10mL of ethylene glycol. Stir vigorously until the titanium tetrachloride is completely dissolved to form a transparent solution. Add 1.0g of tungsten hexachloride (2.52 mmol) was dissolved in 50mL absolute ethanol, and then the above mixed solution was transferred to a 100mL polytetrafluoroethylene kettle (about 90% of the kettle volume), kept at 160℃ for 48h, then cooled to room temperature naturally, and then centrifuged and washed. TiO with cavity core-shell structure 2 / WO 3 Composite photocatalyst.
[0028] Test result: Through SEM and TEM spectrum test, it is found that the catalyst morphology is a core-shell structure with cavities, and the spherical outer surface grows needle-like structures with small particles attached. The particle diameter of the core-shell sphere is about 1-2um, and the diameter of the cavity is about 200nm. , The specific...
Example Embodiment
[0029] Example 3
[0030] Under water bath conditions, add 280uL (2.54mmol) of titanium tetrachloride to 30mL of tert-butanol and 10mL of ethylene glycol. Stir vigorously until the titanium tetrachloride is completely dissolved to form a transparent solution. Add 0.5g of tungsten hexachloride (1.26 mmol) was dissolved in 50mL of absolute ethanol, then the above mixed solution was transferred to a 100mL polytetrafluoroethylene kettle (about 90% of the kettle volume), kept at 160℃ for 48h, then cooled to room temperature naturally, and then centrifuged and washed. TiO with cavity core-shell structure 2 / WO 3 Composite photocatalyst.
[0031] Test result: Observed by scanning electron microscope (SEM), the catalyst has a spherical structure with a core-shell, and the outer surface is small particles attached. The specific surface of the catalyst is about 165m 2 / g Needle-like structure disappears.
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