Method for photocatalytic degradation of pesticide residues
A technology for degrading pesticides and pesticide residues, applied in the field of degradation and removal of pesticide residues, can solve the problems of difficulty in realization, limited scope of pesticide residues, optical pollution, etc., and achieves the effects of low cost, high absorption strength and simple production process
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Embodiment 1
[0023] 0.008mol of urea was dissolved in 40ml of absolute ethanol, 0.004mol of butyl titanate and 0.5ml of glacial acetic acid were mixed in a 100ml small beaker, and then the ethanolic solution of urea was added dropwise under the condition of magnetic stirring. Cool and glacial acetic acid in a beaker, after dripping, magnetically stir for 5 minutes, then transfer the transparent mixture to a 50ml PTFE-lined reaction kettle, put it in a thermostat, and keep it at 150°C. After being kept for 18 hours, it was taken out and cooled to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying box for use.
[0024] Take 1g of synthesized TiO 2 The powder and zinc acetate were added to 120ml of distilled water (the molar ratio of Zn / Ti was 1:1), placed in a sonicator for 20min, and then slowly added 0.35M sodium hydroxide solution under magnetic stirring. After the reaction was completed , a...
Embodiment 2
[0026] 0.016mol of urea was dissolved in 80ml of absolute ethanol, 0.008mol of butyl titanate and 1.0ml of glacial acetic acid were mixed in a 250ml small beaker, and then the ethanolic solution of urea was added dropwise under the condition of magnetic stirring. Cool and glacial acetic acid in a beaker, after dripping, magnetically stir for 10 minutes, then transfer the transparent mixture to a 100ml PTFE-lined reaction kettle, put it in a thermostat, and keep it at 150°C. After being kept for 24 hours, it was taken out and cooled to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying box for use.
[0027] Take 3g of synthesized TiO 2 The powder and zinc acetate were added to 120ml of distilled water (the molar ratio of Zn / Ti was 1:1), placed in a sonicator for 20min, and then slowly added 0.35M sodium hydroxide solution under magnetic stirring. After the reaction was completed ,...
Embodiment 3
[0029]0.008mol of urea was dissolved in 40ml of absolute ethanol, 0.004mol of butyl titanate and 0.5ml of glacial acetic acid were mixed in a 100ml small beaker, and then the ethanolic solution of urea was added dropwise to the solution containing butyl butyrate under magnetic stirring. Cool and glacial acetic acid in a beaker, after dripping, magnetically stir for 5 minutes, then transfer the transparent mixture to a 50ml PTFE-lined reaction kettle, put it in a thermostat, and keep it at 150°C. After being kept for 18 hours, it was taken out and cooled to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying box for use.
[0030] Take 8g of synthesized TiO 2 The powder and zinc acetate were added to 120ml of distilled water (the molar ratio of Zn / Ti was 1:1), placed in a sonicator for 30min, and then slowly added 0.35M sodium hydroxide solution under magnetic stirring. After the rea...
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