Ultra-thin BiOCl/nitrogen-doped graphene quantum dot composite photocatalyst and preparation method thereof
A composite light and catalyst technology, applied in the field of photocatalysis, can solve problems such as complex operation, and achieve the effect of simple preparation process, less time-consuming and rapid production
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Embodiment 1
[0017] Weigh 1.944g of Bi(NO 3 ) 3 ·5H 2 O and 1.600g PVP were dissolved in 40mL mannitol aqueous solution (0.1mol / L) and stirred for 10min; then 20mL saturated KCl solution was slowly added dropwise to the above mixture to produce a uniform white suspension, stirred for 30min; Dissolve g citric acid and 0.144g urea in the above mixture and stir for 30min; transfer the obtained mixture to a 100mL stainless steel autoclave with a PTFE liner and heat it to 160℃ for 4h, then take it out and cool to room temperature. . The obtained product was centrifuged, the solid was collected, washed with deionized water several times, and dried and ground at 60°C to obtain the product BiOCl / NGQDs (1).
[0018] Place 50 mL of Rhodamine B aqueous solution with a concentration of 10 mg / L in a cylindrical quartz container with a cooling jacket, add 50 mg of BiOCl / NGQDs (1) photocatalyst prepared in step 1, and then place the mixed system in the photocatalytic In the reaction device, the adsorption-...
Embodiment 2
[0020] Weigh 1.944g of Bi(NO 3 ) 3 ·5H 2 O and 1.600g PVP were dissolved in 40mL mannitol aqueous solution (0.1mol / L) and stirred for 10min; then 20mL saturated KCl solution was slowly added dropwise to the above mixture to produce a uniform white suspension, stirred for 30min; Dissolve g citric acid and 0.576g urea in the above mixture, stir for 30min; transfer the obtained mixture to a 100mL stainless steel autoclave with a PTFE liner, heat it to 160℃ for 4h, take it out, and cool to room temperature naturally . The obtained product was centrifuged, the solid was collected, washed with deionized water several times, and dried and ground at 60°C to obtain the product BiOCl / NGQDs (2).
[0021] Under the same photocatalytic reaction conditions as in Example 1, the degradation rate of Rhodamine B by BiOCl / NGQDs(2) was 97.35% after 60 minutes.
[0022] figure 1 Shows the BiOCl / NGQDs(2) SEM(a) and TEM(b) photos prepared in Example 2 of the present invention. figure 1 It can be seen th...
Embodiment 3
[0024] Weigh 1.944g of Bi(NO 3 ) 3 ·5H 2 O and 1.600g PVP were dissolved in 40mL mannitol aqueous solution (0.1mol / L) and stirred for 10min; then 20mL saturated KCl solution was slowly added dropwise to the above mixture to produce a uniform white suspension, stirred for 30min; Dissolve g citric acid and 1.152g urea in the above mixture, stir for 30min; transfer the obtained mixture to a 100mL stainless steel autoclave with a PTFE liner, heat it to 160℃ for 4h, take it out, and cool to room temperature naturally . The obtained product was centrifuged, the solid was collected, washed with deionized water several times, and dried and ground at 60°C to obtain the product BiOCl / NGQDs (3).
[0025] Under the same photocatalytic reaction conditions as in Example 1, the degradation rate of Rhodamine B by BiOCl / NGQDs(3) was 75.89% after 60 minutes.
[0026] Control:
[0027] Weigh 1.944g of Bi(NO 3 ) 3 ·5H 2 O and 1.600g PVP were dissolved in 40 mL of 0.1 mol / L mannitol aqueous solution an...
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