Nanometer material doped titanium dioxide photocatalyst and preparation method thereof
A photocatalyst and nanomaterial technology, applied in the field of photocatalysis, can solve the problems of the photocatalytic efficiency is difficult to reach the industrial application level, the photo-induced electron-hole recombination rate is high, and the light response range is narrow, and achieves excellent sewage treatment effect, excellent Adsorption performance, simple process effect
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Embodiment 1
[0044] The photocatalyst material of embodiment 1 is graphene-doped TiO 2 , the preparation method comprises the following steps:
[0045] S1. Measure 12ml of HCl, pour it into 12ml of distilled water, and stir magnetically for 5 minutes; then add 0.4ml TBOT, and stir magnetically for 45 minutes to obtain TiO 2 Precursor solution;
[0046] S2. under magnetic stirring, to the TiO obtained in step S1 2 Add 0.2g graphene to the precursor solution, ultrasonicate for 30min; transfer to a 25ml reaction kettle, keep warm at 150°C for 6h, wash the precipitated substrate with ethanol three times, and dry at 60°C for 2h to obtain graphene-doped TiO 2 photocatalyst material.
[0047] The sample prepared in this embodiment is tested for photocatalytic performance. The specific steps are: take 500ml domestic sewage sample, test COD index is 350mg / L, total phosphorus is 2mg / L, ammonia nitrogen is 30mg / L; take 0.1g graphene mixed with Doped TiO 2 The photocatalyst material was added int...
Embodiment 2
[0049] The photocatalyst material of embodiment 2 is carbon nanotube doped TiO 2 , the preparation method comprises the following steps:
[0050] S1. Measure 12ml of HCl, pour it into 12ml of distilled water, and stir magnetically for 5 minutes; then add 0.4ml TBOT, and stir magnetically for 45 minutes to obtain TiO 2 Precursor solution;
[0051] S2. under magnetic stirring, to the TiO obtained in step S1 2 Add 0.2g of carbon nanotubes to the precursor solution, ultrasonicate for 30min; transfer to a 25ml reaction kettle, keep warm at 150°C for 6h, wash the precipitated substrate with ethanol three times, and dry at 60°C for 2h to obtain carbon nanotube-doped TiO 2 photocatalyst material.
[0052] The photocatalytic performance test is carried out on the sample prepared in this embodiment. The specific steps are: take 500ml domestic sewage sample, test COD index is 350mg / L, total phosphorus is 2mg / L, ammonia nitrogen is 30mg / L; take 0.1g carbon nanotube doped TiO 2 The ph...
Embodiment 3
[0054] The photocatalyst material of embodiment 3 is ZIF-8 doping TiO 2 , the preparation method comprises the following steps:
[0055] S1. Measure 12ml of HCl, pour it into 12ml of distilled water, and stir magnetically for 5 minutes; then add 0.4ml TBOT, and stir magnetically for 45 minutes to obtain TiO 2 Precursor solution;
[0056] S2. the TiO obtained in step S1 2 The precursor solution was transferred to a 25ml reaction kettle, kept at 150°C for 6h, and the obtained precipitated substrate was washed with ethanol for 3 times, and then dried at 60°C for 2h to obtain TiO 2 powder;
[0057] S3. Get 0.2g of TiO obtained in step S2 2 The powder was added with 50ml concentration of Zn(NO 3 ) 2 ·6H 2 O in the methanol solution, sonicated for 10 minutes, which was recorded as solution A; 2-methylimidazole was dissolved in 50ml of methanol, and 10 minutes of sonication was obtained to obtain a solution with a 2-methylimidazole concentration of 0.4mmol / L, which was recorde...
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