A lacoo with high catalytic oxidation activity 3 Catalyst Synthesis Method
A technology for catalytic oxidation and synthesis methods, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of affecting catalyst performance, reducing application value, increasing steps, etc. problems, to achieve the effect of improving catalytic oxidation performance, increasing application value and reducing energy consumption
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Embodiment 1
[0032] Synthesis of Perovskite LaCoO by Adding Pretreated Bamboo Powder 3 catalyst
[0033] (1) Pour 10 g of bamboo powder into a mixture of 100 mL of absolute ethanol and 100 mL of deionized water, add concentrated hydrochloric acid HCl to adjust pH=1, stir for 24 h, wash with deionized water by centrifugation, and place in a After 36 h in an oven at 80 °C, the samples were ground into powder to obtain the bamboo powder samples pretreated with pH=1 mixture for use.
[0034] (2) Weigh the bamboo powder samples obtained in step (1), and divide them into 0.1 g of sample A, 0.3 g of sample B, 0.5 g of sample C, 0.7 g of sample D and 0.9 g of sample E, and then separate the bamboo powder samples respectively. Added to 5 presets with 0.3249 g lanthanum nitrate (La(NO 3 ) 3 •nH 2 O) and 0.2901 g cobalt nitrate (Co(NO 3 ) 2 •6H 2 O), add 40 mL of deionized water to each beaker with stirring. Subsequently, the mixture was stirred and mixed at room temperature (25-30 °C) for 24...
Embodiment 2
[0042] Synthesis of perovskite LaCoO from bamboo powder pretreated with different pH values 3 catalyst
[0043] (1) Pour 3 parts of 10 g bamboo powder into 3 mixed solutions of 100 mL anhydrous ethanol and 100 mL deionized water, concentrated hydrochloric acid HCl, adjust pH=1, pH=4 and pH=7, stir for 24 After 1 h, centrifuged and washed with deionized water, placed in an oven at 80 °C for 36 h, and ground into powder to obtain 3 parts of bamboo powder A (pH=1 pretreatment), bamboo powder B (pH=4 pretreatment) and Bamboo powder C (pH=7 pretreatment), set aside.
[0044] (2) Weigh 0.5 g of bamboo powder A, bamboo powder B, and bamboo powder C, and add them to 0.3249 g of lanthanum nitrate (La(NO) 3 ) 3 •nH 2 O) and 0.2901 g cobalt nitrate (Co(NO 3 ) 2 •6H 2 O), and then added 40 mL of deionized water with stirring at room temperature (25-30 °C) for 24 h, and then placed the mixture in an oven at 80 °C for 36 h.
[0045] (3) The dried mixture was placed in a muffle furna...
Embodiment 3
[0056] Synthesis of perovskite LaCoO at different temperatures 3 catalyst
[0057] Synthesized LaCoO using the same method as in Example 1 3 The synthesis steps of the catalysts are the same, and the difference in the synthesis process lies in the different calcination temperatures used.
[0058] Figure 4 For the XRD pattern of the catalyst prepared in Example 3, it can be seen from the figure that under the calcination condition of 500-700 ° C, the peak positions of the synthesized samples are consistent, and each peak is the same as that of the standard card LaCoO. 3 (JCPSD 48-0848) were well matched and no spurious phase formation was observed.
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