Preparation method for sulfonated graphene loaded tin oxide composite material
A technology of sulfonated graphene and composite materials, applied in the field of photocatalysis, can solve the problems affecting the photocatalytic performance and cycle performance of composite materials, small specific surface area of tin oxide, wide band gap of tin oxide, etc., so as to improve the photocatalytic performance and Cyclic performance, improved photocatalytic performance, low manufacturing cost effects
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Embodiment 1-5
[0027] A kind of preparation method of sulfonated graphene supported tin oxide composite material, comprises the steps:
[0028] S1. Preparation of graphene oxide: Continuously stir graphite, sodium nitrate, and concentrated sulfuric acid at a constant temperature with a stirring speed of 800r / min. Under the condition of constant temperature and constant stirring speed, add potassium permanganate and stir React for 2 hours, then heat it up and keep stirring under constant speed conditions, add deionized water and hydrogen peroxide, centrifuge, wash with deionized water until the pH is 7, ultrasonicate, centrifugally separate after ultrasonication, and finally vacuum dry to prepare Obtain graphene oxide;
[0029] S2, the preparation of reduced graphene oxide: disperse the graphene oxide prepared by step S1 in deionized water, add dropwise a concentration of 10% sodium carbonate solution, until the pH of the dispersion is 9, add a mass concentration of 30g / L Sodium borohydride ...
Embodiment 6
[0049] In order to investigate the photocatalytic performance of the sulfonated graphene-loaded tin oxide composite material prepared in Example 1-5, the sulfonated graphene-loaded tin oxide composite material prepared in Example 1-5 was weighed respectively, and put Put it into 5 test tubes with a volume of 100ml and a concentration of 10mg / ml methylene blue solution, place it in a photoreactor, use a 10W mercury lamp as the only light source, and take out the methylene blue solution every 20min. analyze, Figure 5 The photocatalytic performance line graph of the sulfonated graphene-supported tin oxide composite material prepared for the embodiment, the broken lines 1, 2, 3, 4, 5 in the figure correspond to the sulfonated graphene-loaded prepared in the examples 1-5 The photocatalytic line graph of the tin oxide composite material on the methylene blue solution, the abscissa is the light time, and the ordinate is C / C0, where C is the concentration of the methylene blue soluti...
Embodiment 7
[0051] In order to investigate the reusability of the sulfonated graphene-loaded tin oxide composite material prepared in Example 3, the sulfonated graphene-loaded tin oxide composite material prepared in Example 3 with a mass of 0.03g was weighed and put into a container with a volume of 100ml , put it in a test tube with a concentration of 10mg / ml methylene blue solution, put it in a photoreactor, use a 10W mercury lamp as the only light source, conduct a photocatalytic degradation reaction for 60min, cycle 5 times, take out the methylene blue solution for analysis, Image 6 It is the photocatalytic bar graph of the sulfonated graphene-loaded tin oxide composite material cycled 5 times, the abscissa is the number of cycles, and the ordinate is (C0-C) / C0, where C is the methylene blue solution after photocatalytic irradiation The concentration of , C0 is the initial concentration of methylene blue solution, by Image 6 It can be seen that as the number of cycles increases, (C...
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