Preparation and application of small-sized and large-specific-surface-area carbonate intercalated hydrotalcite
A technology with large specific surface area and high specific surface area, applied in other chemical processes, inorganic chemistry, nickel compounds, etc., can solve the problems of small specific surface area, large hydrotalcite size, poor adsorption performance and electrocatalytic performance, etc. Effects of large surface area, small size, excellent adsorption performance, and electrocatalytic OER performance
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[0027] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.
[0028] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.
[0029] Instruments and equipment:
[0030] The powder diffraction pattern of the hydrotalcite prepared in the following examples is characterized by a MiniFlex II powder diffractometer; the infrared image of the hydrotalcite prepared in the followi...
Embodiment 1
[0032] Store deionized water in the refrigerator until use. Accurately weigh 8 mmol Ni(NO 3 ) 2 . 6H 2 O (molecular weight: 290.79) and 4 mmol Fe(NO 3 ) 3 . 9H 2 O (molecular weight: 404) was dissolved in 20 mL of deionized water to form a homogeneous solution A. 25 mmol Na 2 CO 3(molecular weight: 106) and 30 mmol NaOH (molecular weight: 40) were dissolved in 20 mL of deionized water to form a homogeneous solution B. Pour solutions A and B into two 25 mL burettes respectively, add 20 mL of deionized water to the beaker for co-precipitation, and add a little solution B to the beaker so that the pH of the deionized water in the beaker is 10± 0.1. During uniform co-precipitation, the drop rate of the metal salt solution was kept at 2 mL min -1 , the drop rate of the mixed base was kept at 1 mL min -1 , and during the co-precipitation process, the magnetic stirrer was continuously and vigorously stirred (the rotational speed of the magnetic stirrer was 1600 r min -1...
Embodiment 2
[0040] Store deionized water in the refrigerator until use. Accurately weigh 4.5 mmol of Ni(NO 3 ) 2 . 6H 2 O (molecular weight: 290.79) and 1.5 mmol of Fe(NO 3 ) 3 . 9H 2 O (molecular weight: 404) was dissolved in 20 mL of deionized water to form a homogeneous solution A. 12.5 mmol of Na 2 CO 3 (molecular weight: 106) and 15 mmol of NaOH (molecular weight: 40) were dissolved in 20 mL of deionized water to form a homogeneous solution B. Pour solutions A and B into two 25 mL burettes respectively, and add a little solution B to the beaker previously added with 20 mL deionized water to make the pH of the deionized water in the beaker 10±0.1. During uniform co-precipitation, the dropping rate of the metal salt solution was kept at 2 mL min -1 , the dropping rate of the mixed base was kept at 1 mL min -1 , and keep the magnetic stirrer continuously and violently during the co-precipitation process (the speed of the magnetic stirrer is 1600 r min -1 ), keep the pH at 1...
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