Preparation method of vanadium and nitrogen co-doped titanium dioxide/activated carbon photocatalyst
A technology of titanium dioxide and photocatalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems that restrict practical applications
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Embodiment 1
[0015] Titanate (isopropyl titanate or tetrabutyl titanate) and ethanol were mixed and stirred for 1 h. Add the activated carbon washed with water, dried and ground into the titanate solution, and stir for 4 hours to form a titanium source. The mass ratio of activated carbon and titanium dioxide is 1:0.05. Add citric acid and urea in deionized water in sequence, and stir for 1 h as a nitrogen source. Add oxalic acid and ammonium metavanadate into deionized water and stir for 1 h as vanadium source. The nitrogen source and the vanadium source were mixed into 25 mL of aqueous solution. The aqueous solution was added dropwise to the titanium source, stirred vigorously at 40°C for 2h, left to age for 5 days, dried and ground, and calcined at 400°C for 4h under a nitrogen atmosphere. The molar ratio of titanate to ethanol, citric acid, urea, ammonium metavanadate and oxalic acid is 1:10:2:0.05:0.01:0.02.
[0016] The prepared sulfur-vanadium co-doped supported titanium dioxide ...
Embodiment 2
[0018] Titanate (isopropyl titanate or tetrabutyl titanate) and ethanol were mixed and stirred for 1 h. Add the activated carbon washed with water, dried and ground into the titanate solution, and stir for 4 hours to form a titanium source. The mass ratio of activated carbon and titanium dioxide is 1:0.1. Add citric acid and urea in deionized water in sequence, and stir for 1 h as a nitrogen source. Add oxalic acid and ammonium metavanadate into deionized water and stir for 1 h as vanadium source. The nitrogen source and the vanadium source were mixed into 25 mL of aqueous solution. The aqueous solution was added dropwise to the titanium source, stirred vigorously at 40°C for 2h, left to age for 5 days, dried and ground, and calcined at 400°C for 4h under a nitrogen atmosphere. The molar ratio of titanate to ethanol, citric acid, urea, ammonium metavanadate and oxalic acid is 1:40:2:0.1:0.02:0.04.
[0019] The prepared sulfur-vanadium co-doped supported titanium dioxide ph...
Embodiment 3
[0021] Titanate (isopropyl titanate or tetrabutyl titanate) and ethanol were mixed and stirred for 1 h. Add the activated carbon washed with water, dried and ground into the titanate solution, and stir for 4 hours to form a titanium source. The mass ratio of activated carbon and titanium dioxide is 1:0.2. Add citric acid and urea in deionized water in sequence, and stir for 1 h as a nitrogen source. Add oxalic acid and ammonium metavanadate into deionized water and stir for 1 h as vanadium source. The nitrogen source and the vanadium source were mixed into 25 mL of aqueous solution. The aqueous solution was added dropwise to the titanium source, stirred vigorously at 40°C for 2h, left to age for 5 days, dried and ground, and calcined at 400°C for 4h under a nitrogen atmosphere. The molar ratio of titanate to ethanol, citric acid, urea, ammonium metavanadate and oxalic acid is 1:40:2:0.2:0.03:0.06.
[0022] The prepared sulfur-vanadium co-doped supported titanium dioxide ph...
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