Nano bismuth-based material as well as preparation method and application thereof
A nano-sized, bismuth-based technology, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve the problems of difficult removal of surfactants, complex template preparation methods, waste of energy and materials, etc. The effect of increasing adsorption, improving photocatalytic performance, and green preparation
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Embodiment 1
[0017] (1) Preparation of nano bismuth tetroxide by intermittent hydrothermal method:
[0018] Commercial sodium bismuthate (NaBiO 3 2H 2 O) as raw material, 0.98g NaBiO 3 2H 2 O was added to 70 milliliters of deionized water, and ultrasonically vibrated for 30 minutes in an ultrasonic cleaner to make it evenly dispersed; the dispersion was transferred to a hydrothermal reaction kettle of 100 milliliters, and was passed through intermittent hydrothermal methods (intervals were 70 , 150, and 180min parallel tests) were heated in an oven at 160°C for six times, and the total reaction time was 12 hours to obtain nano-sized bismuth tetroxide;
[0019] (2) Dye preparation: select methylene blue as the target dye molecule, weigh 25 mg of methylene blue and dissolve in 1000 mL of deionized water, and ultrasonically disperse for 30 min to obtain a uniformly dispersed methylene blue solution. The absorbance of methylene blue solution detected by spectrophotometer is A 0 ;
[0020...
Embodiment 2
[0025] (1) Preparation of nano-bismuth trioxide by intermittent alcohol thermal method:
[0026] Commercial bismuth nitrate (Bi(NO) 3 ·5H 2 O) as raw material, 0.98g Bi(NO) 3 ·5H 2 O was added to the mixed solution of 70 ml of ethanol / ethylene glycol (volume ratio of 2:1), and ultrasonically oscillated for 30 minutes in an ultrasonic cleaner to completely dissolve and form a uniform solution; transfer the dispersion to 100 ml In the hydrothermal reaction kettle, heat in a 160°C oven three times by intermittent hydrothermal method (interval time is 120min), and the total reaction time is 6 hours to obtain nano-sized bismuth trioxide;
[0027] (2) Dye preparation: select methylene blue as the target dye molecule, weigh 25 mg of methylene blue and dissolve in 1000 mL of deionized water, and ultrasonically disperse for 30 min to obtain a uniformly dispersed methylene blue solution. The absorbance of methylene blue solution detected by spectrophotometer is A 0 ;
[0028] (3) ...
Embodiment 3
[0031] (1) Preparation of nano-bismuth molybdate by intermittent hydrothermal method:
[0032] Bismuth nitrate (Bi(NO 3 )·5H 2 O) and ammonium molybdate ((NH 4 ) 2 MoO 4 ) as raw material, 0.8g Bi(NO 3 )·5H 2 O with 0.4g (NH 4 ) 2 MoO 4 Add it into 70 milliliters of deionized water, and ultrasonically vibrate for 30 minutes in an ultrasonic cleaner to make it evenly dispersed; transfer the dispersion to a 100 milliliter hydrothermal reaction kettle, and divide Heating in an oven at 160°C for six times, with a total reaction time of 12 hours, to obtain nano-sized bismuth molybdate;
[0033] (2) Dye preparation: select methylene blue as the target dye molecule, weigh 25 mg of methylene blue and dissolve in 1000 mL of deionized water, and ultrasonically disperse for 30 min to obtain a uniformly dispersed methylene blue solution. The absorbance of methylene blue solution detected by spectrophotometer is A 0 ;
[0034] (3) Photocatalytic test process:
[0035] The main...
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