Application of titanium dioxide nano-catalyst in removal of nitrate nitrogen in water body through photocatalysis
A nano-catalyst, titanium dioxide technology, applied in physical/chemical process catalysts, light water/sewage treatment, water pollutants, etc., can solve the problems of increasing synthesis cost, degrading nitrate performance and nitrogen selectivity, etc., to achieve performance High efficiency, reduce harm to organisms and human body, and reduce the effect of synthesis cost
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Embodiment 1
[0028] Take 2mL TiCl 4 Add 30 mL of ethylene glycol, stir at room temperature for 30 min, add 2 mL of deionized water, and continue to stir for 30 min until no hydrogen chloride gas is generated, and the solution is a uniform white emulsion. Heating for 4 hours, centrifuging to separate out the solids, washing with deionized water and ethanol for several times, and then vacuum drying at 60 °C for 12 hours to obtain TiO 2 Nanocatalyst (TO).
[0029] Photocatalytic degradation of nitrate nitrogen using TO as a catalyst. Weigh 10mg TO nanocatalyst and put it into a quartz container, add 100mL with a concentration of 50mg / L NO 3 - The -N solution and 100 μL of formic acid were stirred, and nitrogen gas was aerated for 10 min. The amount of nitrogen gas was 10 mL / min. The purity of nitrogen was 90%. Then the quartz container was placed under simulated sunlight for 4 h. Nitrate nitrogen degradation effect see Figure 4 , the degradation rate of nitrate nitrogen reaches 10%, and...
Embodiment 2
[0031] Take 2mL TiCl 4 Add 30 mL of ethylene glycol, stir at room temperature for 30 min, add 2 mL of deionized water, and continue to stir for 30 min until no hydrogen chloride gas is generated, and the solution is a uniform white emulsion. Heating for 4 hours, and then centrifuging to separate out the solid, washed with deionized water and ethanol several times, and then vacuum-dried at 60 °C for 12 hours. The vacuum-dried mixture was heated to 500 °C for 2 hours at a rate of 10 °C / min. That is to get TiO 2 Nanocatalyst (TO-500).
[0032] Photocatalytic degradation of nitrate nitrogen with TO-500 as catalyst. Weigh 10mg TO-500 nanocatalyst into a quartz container, add 100mL of 50mg / L NO 3 - The -N solution and 100 μL of formic acid were stirred, and nitrogen gas was aerated for 10 min. The amount of nitrogen gas was 10 mL / min. The purity of nitrogen was 90%. Then the quartz container was placed under simulated sunlight for 4 h. Nitrate nitrogen degradation effect see ...
Embodiment 3
[0034] Take 2mL TiCl 4 Put in 30 mL of ethylene glycol, stir at room temperature for 30 min, add 2 mL of deionized water, and continue to stir for 30 min until no hydrogen chloride gas is generated, and the solution is a uniform white emulsion. After heating for 4 hours, the solid was separated by centrifugation, washed several times with deionized water and ethanol, and then vacuum-dried at 60 °C for 12 hours. The vacuum-dried mixture was heated to 800 °C for 2 hours at a rate of 10 °C / min. That is to get TiO 2 Nanocatalyst (TO-800).
[0035] Photocatalytic degradation of nitrate nitrogen with TO-800 as catalyst. Weigh 10mg TO-800 nanocatalyst into a quartz container, add 100mL of 50mg / L NO3 - The -N solution and 100 μL of formic acid were stirred, and nitrogen gas was aerated for 10 min. The amount of nitrogen gas was 10 mL / min. The purity of nitrogen was 90%. Then the quartz container was placed under simulated sunlight for 4 h. Nitrate nitrogen degradation effect see ...
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