A modified carbon nitride and its preparation method and a printing and dyeing wastewater remover and its preparation method
A technology of carbon nitride and carbon oxynitride, applied in chemical instruments and methods, nitrogen compounds, special compound water treatment, etc., can solve the problem of slow removal speed and achieve fast and efficient treatment effect
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[0028] The present invention provides a method for preparing modified carbon nitride, which comprises the following steps:
[0029] Under an inert atmosphere, thermally oxidize the mixture containing carbon nitride and hydrogen peroxide to obtain oxidized carbon nitride;
[0030] Under an inert atmosphere, the mixture containing oxidized carbon nitride, surfactant and water is thermally modified to obtain modified carbon nitride.
[0031] The present invention thermally oxidizes the mixture containing carbon nitride and hydrogen peroxide under an inert atmosphere to obtain oxidized carbon nitride. In the present invention, the inert atmosphere is specifically an inert atmosphere well known to those skilled in the art such as nitrogen, argon and the like. In the present invention, the inert atmosphere can eliminate the influence of oxygen in the air on the thermal oxidation process. In the present invention, it is not necessary to separately deoxidize the mixture containing carbon n...
Embodiment 1
[0057] Put 50 parts by mass of carbon nitride in a three-necked flask, add 30 parts of industrial hydrogen peroxide with a mass concentration of 27%, heat in a water bath at 30°C, pass in nitrogen protective gas, condense and reflux for 3 hours, filter and dry to obtain Solid powder.
[0058] Put 50 parts by mass of solid powder in a three-necked flask, add 80 parts of water, 5 parts of sodium dodecylbenzene sulfonate, heat in a water bath at 30°C, pass in nitrogen protective gas, and reflux for 1 hour , Filter and dry to obtain modified carbon nitride.
[0059] Put 20 parts by mass of polyaluminum chloride and 2 parts by mass of polycation polyacrylamide into a three-necked flask, add 100 parts by mass of chloroform, and stir at 300 rpm with a stirring power of 600W. Then add 30 parts by mass of modified carbon nitride, continue to stir for 2 hours, filter and dry to obtain a high-efficiency removal agent for printing and dyeing wastewater.
[0060] The printing and dyeing wastewa...
Embodiment 2
[0062] Put 70 parts by mass of carbon nitride in a three-necked flask, add 50 parts of industrial hydrogen peroxide with a mass concentration of 27%, heat in a water bath at 50°C, introduce nitrogen protective gas, reflux for 5 hours, and filter and dry Solid powder.
[0063] Put 70 parts by mass of solid powder in a three-necked flask, add 100 parts of water, add 5-10 parts of cetyl ammonium bromide, heat in a water bath at 50°C, pass in nitrogen protective gas, and condense and reflux 2 After hours, filtered and dried to obtain modified carbon nitride.
[0064] Put 68 parts by mass of polyferric chloride and 10 parts by mass of non-ionic polyacrylamide into a three-necked flask, add 150 parts by mass of chloroform, and stir at 500 rpm with a stirring power of 1000 W. Then add 70 parts by mass of modified carbon nitride, continue to stir for 5 hours, filter and dry to obtain a high-efficiency removal agent for printing and dyeing wastewater.
[0065] The printing and dyeing wastew...
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