Photocatalytic basic lanthanum carbonate and preparation method and application thereof
A photocatalyst, lanthanum carbonate technology, applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of low quantum efficiency, restricting the practical application of photocatalytic technology, and low utilization of solar energy, etc. The method is simple and easy to implement, and is conducive to the effect of large-scale promotion
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[0015] The preparation method of this photocatalyst is hydrothermal method:
[0016] The specific steps are as follows: Dissolve the mixture of alkaline solid urea or sodium hydroxide and sodium carbonate as a carbon source in deionized water, ethylene glycol or ethanol in one or two mixed solvents to obtain a concentration of 0.1~ 1 mol / L carbon source solution; dissolve one of solid lanthanum oxide, lanthanum nitrate or lanthanum acetate as a lanthanum source in one or two mixed solvents of deionized water, ethylene glycol or ethanol Prepare a lanthanum source solution with a concentration of 0.01~0.1 mol / L; add the carbon source solution dropwise while stirring in the lanthanum source solution, continue to stir for 30~180 minutes, and transfer it to a high-pressure reactor at a constant temperature of 90~180°C for 12~24 Hours, naturally cooled to room temperature, the precipitate was washed with water and ethanol and centrifuged several times (to ion concentration <10ppm), ...
Embodiment 1
[0017] Example 1, LaCO 3 Preparation of OH catalyst
[0018] Weigh 0.006 mol CO(NH 2 ) 2 The solid was dissolved in 40 mL of water-alcohol mixed solvent (V 水 :V 乙醇 =35:5) to prepare urea solution; weigh 0.001 mol La(NO 3 ) 3 ·6H 2 O solid was dissolved in 35 mL deionized water to prepare a lanthanum nitrate solution, and the prepared urea solution was added dropwise to the lanthanum nitrate solution while stirring, and the stirring was continued for 30 minutes. Hours, cool down to room temperature naturally, centrifuge the obtained precipitate, wash, dry at 40°C under normal pressure for 24 hours and grind to obtain white LaCO 3 OH powder.
Embodiment 2
[0019] Example 2, LaCO 3 Preparation of OH catalyst
[0020] Weigh 0.006 mol CO(NH 2 ) 2 The solid was dissolved in 55 mL of water-alcohol mixed solvent (V 水 :V 乙醇 =35:20) to prepare urea solution; weigh 0.001 mol La(NO 3 ) 3 ·6H 2 O solid was dissolved in 35 mL deionized water to prepare a lanthanum nitrate solution, and the prepared urea solution was added dropwise to the lanthanum nitrate solution while stirring, and the stirring was continued for 180 minutes, and the mixed solution was transferred to a high-pressure reactor, and kept at 180°C for 12 Hours, cool down to room temperature naturally, centrifuge the obtained precipitate, wash, dry at 120°C under normal pressure for 12 hours and grind to obtain white LaCO 3 OH powder.
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