Red mud-based composite photocatalyst, and preparation method and application thereof
A composite light and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low activity of red mud photocatalysts, and achieve sufficient raw material sources, sufficient raw materials, and raw material costs. low effect
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[0026] A preparation method of red mud-based composite photocatalyst, the preparation steps are as follows:
[0027] (1) Dry the red mud in an oven to obtain solid red mud powder, wherein the temperature of the oven is 100-110 °C, and dry for 2 hours;
[0028] (2) Put the red mud powder obtained in step 1 into a sieve and sieve to obtain the spare red mud powder, the size of the sieve is 150-200 mesh;
[0029] (3) Mix the solid melamine with the spare red mud powder and put it into a quartz mortar for grinding for 25-35 minutes;
[0030] (4) Put the mixed powder obtained in step 3 into a crucible, and place the crucible in a muffle furnace for calcination. The calcination temperature is 500-600 ℃, and keep it warm for 2-4 hours. The temperature in the muffle furnace is from room temperature to Raise the temperature to 500-600 °C, and the heating rate is 2-6 °C / min;
[0031] (5) The mixed powder in step 4 is air-cooled to room temperature and then ground again in a quartz mor...
Embodiment 1
[0039] Pretreatment of red mud: Take a certain amount of red mud and place it in an oven at 110°C for drying, and then sieve it with a 175-mesh sieve to obtain solid red mud powder.
[0040] Weigh 10 g of melamine and 0.1 g of pretreated red mud, grind them in a quartz mortar for 30 min, put them into a crucible, then place the crucible in a muffle furnace, and heat it from room temperature to 550 °C with a heating rate of 5 °C / min , kept at 550 °C for 3 h, cooled to room temperature, and finally the calcined solid powder was ground in a quartz mortar for 30 min to obtain red mud / C 3 N 4 Composite photocatalyst, sealed and sealed.
Embodiment 2
[0042] The red mud pretreatment steps are the same as in Example 1.
[0043] Weigh 10 g of melamine and 0.2 g of pretreated red mud, and the preparation steps are the same as above.
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