MoSe2/carbon quantum dot full spectrum response photocatalyst and preparation method thereof
A technology of carbon quantum dots and photocatalysts, which is applied in the field of photocatalytic materials, can solve problems such as unsafe production processes, unreported, toxic reagents, etc., and achieve industrial-scale application, simple and easy preparation methods, and mild conditions Effect
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Embodiment 1
[0025] 1) Preparation of photocatalyst
[0026] Dissolve selenium powder and sodium sulfite in 30ml of deionized water, the concentration of selenium powder is 0.1mol / l, the concentration of sodium sulfite is 0.4mol / l, ultrasonically disperse for 30 minutes, transfer to a 100ml high-pressure reactor, and react at 150°C for 1 hour, A colorless and transparent solution was obtained. Then add 30ml 0.05mol / l sodium molybdate solution to the solution, add 9.5mg sucrose and 0.05mol / l sodium borohydride, stir for 30 minutes, adjust the pH value to 7, continue stirring for 30 minutes, transfer to the high pressure reactor , react at a constant temperature of 150°C for 24 hours, wash, and dry to obtain MoSe 2 / CQDs complex.
[0027] figure 1 For the synthesized MoSe 2 / Scanning and transmission electron micrographs of CQDs. It can be seen from the different magnifications in the figure that the MoSe 2 As a two-dimensional sheet structure, CQDs are well dispersed in MoSe 2 in the...
Embodiment 2
[0035] Dissolve selenium powder and sodium sulfite in 30ml of deionized water, the concentration of selenium powder is 0.2mol / l, the concentration of sodium sulfite is 0.8mol / l, ultrasonically disperse for 30 minutes, transfer to a 100ml high-pressure reactor, and react at 150°C for 1 hour, A colorless and transparent solution was obtained. Then add 30ml 0.1mol / l sodium molybdate solution to the solution, add 9.5mg sucrose and 0.05mol / l sodium borohydride, stir for 30 minutes, adjust the pH value to 9, continue stirring for 30 minutes, transfer to the high pressure reactor , react at a constant temperature of 160°C for 24 hours, wash, and dry to obtain MoSe 2 / CQDs complex.
[0036] The visible light catalytic activity of the photocatalyst prepared in this example to Cr(VI) was tested by the method described in Embodiment 1. Its related properties and photocatalytic performance are shown in Table 1.
Embodiment 3
[0038] Dissolve selenium oxide and sodium sulfite in 30ml of deionized water, the concentration of selenium oxide is 0.1mol / l, the concentration of sodium sulfite is 0.4mol / l, ultrasonically disperse for 30 minutes, transfer to a 100ml high-pressure reactor, and react at 150°C for 1 hour, A colorless and transparent solution was obtained. Then add 30ml of 0.05mol / l ammonium molybdate solution to the solution, add 15mg of glucose and 0.05mol / l sodium borohydride, stir for 30 minutes, adjust the pH value to 9, continue stirring for 30 minutes, and transfer to the autoclave , reacted at a constant temperature of 180°C for 24 hours, washed and dried to obtain MoSe 2 / CQDs complex.
[0039] The visible light catalytic activity of the photocatalyst prepared in this example to phenol was tested by the method described in Embodiment 1. Its related properties and photocatalytic performance are shown in Table 1.
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