A kind of fe2o3/ag3vo4 composite photocatalyst and preparation method thereof
A composite light and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low degradation efficiency of organic dyes, low utilization rate of visible light, Poor stability and other problems, to achieve the effect of low cost, simple and easy method, and improve absorption characteristics
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Embodiment 1
[0028] The iron oxide used was prepared by the synthesis of nanoparticles of Fe by hydrothermal method and calcination 2 o 3 , weighed 8.08g Fe(NO 3 ) 3 9H 2 O was placed in a beaker, 80 mL of ethylene glycol (EG) was added and stirred until the nitrate was completely dissolved. Then weigh 7.20g CH 3 COONa and 2g PEG-600 were added to the above solution, and magnetically stirred for 1.5h until a uniform suspension was formed. Then these suspensions were divided into 25mL high-temperature stainless steel reaction kettles, and placed in an oven and heated to 200°C for 22 hours. After the reaction kettle was cooled, the obtained solids were taken out, washed 10 times with water, and washed 10 times with ethanol. Dry in a 60°C oven. Then grind the obtained solid and put it into a crucible, put it in a muffle furnace and heat it up to 500°C for calcination for 2 hours to obtain Fe 2 o 3 sample. The iron oxides used in Examples 2-5 were all prepared by the method of this ex...
Embodiment 2
[0037] Put 0.0010g of iron oxide in 40mL of distilled water for ultrasonic dispersion for 10min, and stir in an ice-water bath (0°C) to obtain dispersion A of iron oxide; disperse 0.24g of silver nitrate in the above dispersion to obtain dissolved silver nitrate Iron oxide mixed solution B; at the same time, in an ice water (0°C) bath, dissolve 0.1884g sodium vanadate dodecahydrate in 40mL distilled water to obtain solution C; The prepared C solution was added dropwise to the B solution, and continued to stir in an ice-water bath (0°C) for 120 min; the obtained product was washed and dried to obtain the composite photocatalyst. The material can degrade 90.0% of rhodamine B in 60 minutes under visible light irradiation.
Embodiment 3
[0039] Put 0.0018g of iron oxide in 40mL of distilled water for ultrasonic dispersion for 40min, and stir in 40mL of 30°C constant temperature distilled water to obtain the dispersion A of iron oxide; Iron oxide mixed solution B; at the same time, under the condition of 30°C constant temperature water bath, dissolve 0.1900g of sodium vanadate dodecahydrate in 40mL of 30°C constant temperature water bath to obtain solution C; under the condition of uniform stirring in the 30°C constant temperature water bath, the prepared The good C solution was added dropwise to the B solution, and continued to stir in a 30°C constant temperature water bath for 120 minutes; the obtained product was washed and dried to obtain the composite photocatalyst, which could degrade 88.0% of rhodamine B in 60 minutes.
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