Copolymerization-modified graphite-phase carbon nitride hollow ball visible light-driven photocatalyst
A technology of graphite phase carbon nitride and hollow spheres, applied in the direction of physical/chemical process catalysts, hydrogen production, chemical instruments and methods, etc., can solve the problems of less active sites, low quantum efficiency, small specific surface area, etc. Strong regenerative ability, high recycling rate, and the effect of increasing the specific surface area
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[0022] Example 1
[0023] Dissolve cyanamide and 2-aminothiophen-3-carbonitrile with a mass ratio of 25:1 in an aqueous solution of 15.5 g of silica spherical sol, sonicate, heat and stir at 80°C, centrifuge, and dry to obtain a white powder. In an air or nitrogen atmosphere, the temperature is kept at 550°C for 4 h, and the heating rate is 2.3°C / min to obtain a yellow powder. Add to 8 mol / L NH 4 HF 2 The solution was stirred for 48 h, filtered, washed with water, stirred for another 48 h, filtered, washed with water, and dried under vacuum at 80°C to obtain copolymerized modified hollow spherical carbon nitride.
Example Embodiment
[0024] Example 2
[0025] Dissolve cyanamide and 2-aminothiophene-3-carbonitrile with a mass ratio of 100:1 in an aqueous solution of 15.5 g of silica ball sol, sonicate, heat and stir at 80°C, centrifuge, and dry to obtain a white powder. Or in a nitrogen atmosphere, keep it at 550°C for 4 h, and the heating rate is 2.3°C / min to obtain a yellow powder. Add to 8 mol / L NH 4 HF 2 The solution was stirred for 48 h, filtered, washed with water, stirred for another 48 h, filtered, washed with water, and dried under vacuum at 80°C to obtain copolymerized modified hollow spherical carbon nitride.
Example Embodiment
[0026] Example 3
[0027] Dissolve cyanamide and 2-aminothiophen-3-carbonitrile with a mass ratio of 200:1 in an aqueous solution of 15.5 g of silica ball sol, sonicate, heat and stir at 80°C, centrifuge, and dry to obtain a white powder. Or in a nitrogen atmosphere, keep it at 550°C for 4 h, and the heating rate is 2.3°C / min to obtain a yellow powder. Add to 8 mol / L NH 4 HF 2 The solution was stirred for 48 h, filtered, washed with water, stirred for another 48 h, filtered, washed with water, and dried under vacuum at 80°C to obtain copolymerized modified hollow spherical carbon nitride.
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