Method for catalytically degrading phenol in water body through utilizing high-temperature quenching modified LaCoO3-delta material
A high-temperature quenching and modification technology, applied in the direction of material electrochemical variables, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic efficiency, achieve high removal efficiency, accelerate electron transfer ability, and accelerate reaction speed effect
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Embodiment 1
[0043] Example 1: A high temperature quenching modified LaCoO 3-δ The method for material catalytic degradation of phenol in water is accomplished in the following steps:
[0044] 1) Weigh a certain amount of lanthanum nitrate hexahydrate and cobalt nitrate hexahydrate respectively in a large beaker according to the proportion. The molar ratio of lanthanum nitrate and cobalt nitrate is 1:1, add an appropriate amount of deionized water on the heating platform, and stir until the particles are completely Dissolved to give a clear solution. Dissolve ethylenediaminetetraacetic acid and citric acid monohydrate in ammonia water to form a mixed solution. After stirring until clear, the mixed solution is poured into the previous metal salt solution. Theoretically, the amount of ammonia water can control the pH value of the precursor solution at about 7-9. When the solution was stirred into a gel, it was dried in a blast drying oven for 5-7 h. Get LaCoO 3-δ Precursor. The precurso...
Embodiment 2
[0047] Embodiment 2: comparative experiment; use the LaCoO under natural cooling 3-δ Catalytic peroxomonosulfate removes phenol in water, and specifically completes according to the following steps:
[0048] 1) Weigh a certain amount of lanthanum nitrate hexahydrate and cobalt nitrate hexahydrate respectively in a large beaker according to the proportion. The molar ratio of lanthanum nitrate and cobalt nitrate is 1:1, add an appropriate amount of deionized water on the heating platform, and stir until the particles are completely Dissolved to give a clear solution. Dissolve ethylenediaminetetraacetic acid and citric acid monohydrate in ammonia water to form a mixed solution. After stirring until clear, the mixed solution is poured into the previous metal salt solution. Theoretically, the amount of ammonia water can keep the pH value of the precursor solution at about 7-9. When the solution was stirred into a gel, it was dried in a blast drying oven for 5-7 h. Get LaCoO 3-δ...
Embodiment 3
[0053] Example 3: High temperature quenching modified LaCoO 3-δ The capacitance measurement of the material is done according to the following steps:
[0054] For high temperature quenching modified LaCoO 3-δ The capacitance of the material is measured, and the material is subjected to an electrochemical test, and its CV curve is as follows Figure 6 shown. From the figure, it can be calculated that the high temperature quenching modified LaCoO 3-δ The capacitance of the material is 27.8 mF g -1 , among them, high temperature quenching modified LaCoO 3-δ The loading of the material on the working electrode was 0.01 g.
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