a tio-based 2-x Hindered Lewis acid-base pair photocatalyst and preparation method and application thereof
A Lewis acid-base and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve difficult problems such as Lewis acid-base regulation, which is beneficial to adsorption and activation, innovation Strong, the effect of improving CO2 reduction efficiency
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[0035] Hindered Lewis acid-base pair TiO 2-x The preparation method and application of the material photocatalyst, comprising the following steps:
[0036] (1) 1 mmol salt (MCl 2 , MCO 3 , M(NO 3 ) 2 , M=Mg, Ca, Sr, Ba, Mn, Fe, Co, Ni, Cu, Zn) was dissolved in 10-40mL mixed solution of ethanol and polyethylene glycol, the solution was stirred evenly, and then added to the above solution 1 mmol titanium source (n-butyl titanate, isopropyl titanate), stir evenly, add 6 mmol alkaline mineralization reagent (NaOH, KOH), stir evenly, transfer to the reaction kettle and put it in a 150~200 ℃ oven for reaction 12 ~25h, after centrifugation and washing, the perovskite material MTiO was obtained 3 .
[0037] (2) Weighing 0.5 mmol of the MTiO prepared above 3 Add it to the mixed solution of 20~60mL of water and polyethylene glycol, then add 1mmol of chelating reagent (EDTA-2Na or its hydrate), after the solution is stirred evenly, put it into the reaction kettle and react in the ...
Embodiment 1
[0039] Example 1CaTiO 3 Preparation of catalyst
[0040] (1) 1 mmol CaCl 2 ·H 2 O was dissolved in a mixed solution of 20 mL of ethanol and polyethylene glycol, the solution was stirred uniformly, then 1 mmol of titanium source (n-butyl titanate, isopropyl titanate) was added to the above solution, and 6 mmol of alkaline was added after stirring uniformly. Mineralizing reagents (NaOH, KOH), stirred evenly, transferred to the reaction kettle and placed in an oven at 180°C for 15h reaction. Perovskite material MTiO obtained after centrifugal washing 3 (like figure 1 shown).
[0041] (2) Weigh 0.5 mmol of the CaTiO prepared above 3 Add it to a mixed solution of 40 mL of water and polyethylene glycol, then add 1 mmol of a chelating reagent (EDTA-2Na or its hydrate), and after the solution is stirred evenly, put it in a reaction kettle and react in an oven at 180 °C for 12 hours, and wash it by centrifugation. Obtaining TiO with Hindered Lewis Acid-Base Pairs 2 Photocatalys...
Embodiment 2
[0043] Example 2MgCl 2 Preparation of catalyst
[0044] (1) 1.2 mmol MgCl 2 Dissolved in a mixed solution of 30 mL of ethanol and polyethylene glycol, the solution was stirred evenly, then 1 mmol of titanium source (n-butyl titanate, isopropyl titanate) was added to the above solution, 4 mmol of NaOH reagent was added after stirring, and the mixture was stirred. After uniformity, it was transferred to the reaction kettle and placed in an oven at 180°C for 15h reaction. After centrifugal washing, the perovskite material MgTiO was obtained 3 .
[0045] (2) Weighing 0.5 mmol of the MgTiO prepared above 3 It was added to 30 mL of mixed solution of water and polyethylene glycol, and then 1 mmol of chelating reagent (EDTA-2Na or its hydrate) was added. After the solution was stirred evenly, it was placed in a reaction kettle for 12 hours in an oven at 180°C, and washed by centrifugation. Obtaining TiO with Hindered Lewis Acid-Base Pairs 2 catalyst of light.
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