A kind of g-c3n4/tio2 composite photocatalyst and preparation method thereof
A g-c3n4, composite light technology, applied in the field of photocatalytic materials, can solve the problems of photocatalyst activity, stability effect, restricting the transport of photogenerated electrons and holes, and the accumulation of photogenerated electrons and holes cannot be effectively utilized. It is beneficial to large-scale preparation, prolonging life and improving quantum efficiency.
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Embodiment 1
[0033] Embodiment 1 A kind of g-C 3 N 4 / TiO 2 Composite photocatalyst (g-C 3 N4 and TiO 2 The mass ratio is 2:1)
[0034] The preparation method is as follows:
[0035] 1) Mix 3g of tetra-n-butyl titanate, 0.2g of triethanolamine and 20ml of absolute ethanol, and record it as solution B; ultrasonically disperse 0.5g of PS balls in 60ml of absolute ethanol, ultrasonically disperse for 1 hour, and then add 0.5ml of Ammonia, denoted as solution A; then the solution B that was stirred until transparent was added dropwise to solution A, and stirred for 2 hours to obtain TiO with a core-shell structure. 2 @PS Ball;
[0036] 2) Obtain TiO from 1) 2 @PS spheres are dispersed in 60ml methanol solution, which is recorded as solution C; 1.4g g-C 3 N 4 Ultrasonic dispersion in 200ml of methanol solution, recorded as solution D; solution C that has been ultrasonically dispersed for 1 hour was added drop by drop to solution D that had been ultrasonically dispersed for 1 hour, and ...
Embodiment 2
[0041] Embodiment 2 A kind of g-C 3 N 4 / TiO 2 Composite photocatalyst (g-C 3 N 4 with TiO 2 The mass ratio is 1.5:1)
[0042] The preparation method is as follows:
[0043] 1) Mix 3g of tetra-n-butyl titanate, 0.2g of triethanolamine and 20ml of absolute ethanol, and record it as solution B; ultrasonically disperse 0.5g of PS balls in 60ml of absolute ethanol, ultrasonically disperse for 1 hour, and then add 0.5ml of Ammonia, denoted as solution A; then the solution B that was stirred until transparent was added dropwise to solution A, and stirred for 2 hours to obtain TiO with a core-shell structure. 2 @PS Ball;
[0044] 2) Obtain TiO from 1) 2 @PS spheres are dispersed in 60ml methanol solution, which is recorded as solution C; 1.05g g-C 3 N 4 Ultrasonic dispersion in 200ml of methanol solution, recorded as solution D; solution C that has been ultrasonically dispersed for 1 hour was added drop by drop to solution D that had been ultrasonically dispersed for 1 hour...
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