A kind of diatomaceous earth/(gr+tio 2 ) preparation method of composite photocatalyst
A technology of diatomite and catalyst, which is applied in the field of preparation of diatomite/composite photocatalyst, can solve problems such as difficulty in separating catalyst and water, and achieve the effects of improving photocatalytic degradation rate, improving affinity and improving adsorption efficiency.
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Embodiment 1
[0029] Select raw materials according to the following requirements:
[0030] 1) Diatomite: finely purified diatomite, fineness 80 mesh, silicon dioxide content 80%;
[0031] 2) tetrabutyl titanate: technically pure;
[0032] 3) Graphene: graphene oxide;
[0033] 4) absolute ethanol: industrial pure;
[0034] 5) Acetic acid: industrial grade.
[0035] The method comprises the steps of:
[0036] 1) Measure 15mL of tetrabutyl titanate, 75mL of absolute ethanol, 7.5mL of distilled water and 1.5mL of acetic acid. TiO 2 Precursor gel, set aside;
[0037] 2) Weigh 30g of purified diatomite powder, 0.8g of graphene, and weigh TiO 2 Precursor gel, converted into 8g of titanium dioxide, add appropriate amount of water to stir and mix the three, put it in a high-pressure reactor, and react at 150°C for 12 hours under magnetic stirring;
[0038] 3) After the mixed solution was dried at 60°C, it was placed in a nitrogen atmosphere furnace, and kept at 650°C for 2 hours to obtain d...
Embodiment 2
[0041] Select raw materials according to the following requirements:
[0042] 1) Diatomite: finely purified diatomite with a fineness of 800 mesh and a silicon dioxide content of 86%;
[0043] 2) tetrabutyl titanate: technically pure;
[0044] 3) Graphene: graphene oxide;
[0045] 4) absolute ethanol: industrial pure;
[0046] 5) Acetic acid: industrial grade.
[0047] The method comprises the steps of:
[0048] 1) Measure 5mL of tetrabutyl titanate, 65mL of absolute ethanol, 6mL of distilled water and 1mL of acetic acid. 2 Precursor gel, set aside;
[0049] 2) Weigh 85g of purified diatomite powder, 1.5g of graphene, and weigh TiO 2 Precursor gel, converted into 5g of titanium dioxide, add appropriate amount of water to stir and mix the three, put it in a high-pressure reactor, and react at 20°C for 1 hour under magnetic stirring;
[0050] 3) After the mixed solution was dried at 80°C, it was placed in a nitrogen atmosphere furnace, and kept at 300°C for 1 hour to obta...
Embodiment 3
[0052] Select raw materials according to the following requirements:
[0053] 1) Diatomite: Finely purified diatomite with a fineness of 1250 mesh and a silicon dioxide content of 92%;
[0054] 2) tetrabutyl titanate: technically pure;
[0055] 3) Graphene: graphene oxide;
[0056] 4) absolute ethanol: industrial pure;
[0057] 5) Acetic acid: industrial grade.
[0058] The method comprises the steps of:
[0059] 1) Measure 10mL of tetrabutyl titanate, 70mL of absolute ethanol, 10mL of distilled water and 5mL of acetic acid. 2 Precursor gel, set aside;
[0060] 2) Weigh 95g of purified diatomite powder, 2.5g of graphene, and weigh TiO 2 Precursor gel, converted into 2.5g of titanium dioxide, add appropriate amount of water to stir and mix the three, put it in a high-pressure reactor, and react at 200°C for 30h under magnetic stirring;
[0061] 3) After the mixed solution was dried at 70°C, it was placed in a nitrogen atmosphere furnace, and kept at 800°C for 100 hours to ...
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