Preparation method of sandwich nickel substituted silicon tungsten oxygen cluster catalyst
A sandwich-type, catalyst technology is applied in the oxidation preparation of carbonyl compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. , the effect of good catalytic activity
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Embodiment 1
[0027] Example 1 Compound K 4 (H 2 O) 8 Na 8 (H 2 O) 8 Ni 4 Si 2 W 18 o 68 The preparation, its synthetic steps are as follows:
[0028] Add K successively to a clean beaker 8 [γ-SiW 10 o 36 ]·12H 2 O (1.5g) and 20mL sodium acetate-acetic acid buffer solution, stirred vigorously at 40°C for 15min, added nickel chloride (0.2g), reacted for 2h, after the reaction was completed, cooled to room temperature, filtered, and the filtrate slowly evaporated at room temperature , After 5-7 days, blocky single crystals were obtained. The yield is about 35%.
Embodiment 2
[0029] Example 2 Compound K 4 (H 2 O) 8 Na 8 (H 2 O) 8 Ni 4 Si 2 W 18 o 68 The preparation, its synthetic steps are as follows:
[0030] Add K successively to a clean beaker 8 [γ-SiW10 o 36 ]·12H 2 O (2g) and 20mL sodium acetate-acetic acid buffer solution, stirred vigorously at 40°C for 15min, added nickel chloride (0.2g), reacted for 2h, after the reaction was completed, cooled to room temperature, filtered, and the filtrate evaporated slowly at room temperature, After 5-7 days, bulk single crystals are obtained. The yield is about 37%.
Embodiment 3
[0031] Example 3 Compound K 4 (H 2 O) 8 Na 8 (H 2 O) 8 Ni 4 Si 2 W 18 o 68 The preparation, its synthetic steps are as follows:
[0032] Add K successively to a clean beaker 8 [γ-SiW 10 o 36 ]·12H 2 O (1.5g) and 30mL sodium acetate-acetic acid buffer solution, stirred vigorously at 40°C for 15min, added nickel chloride (0.25g), reacted for 2h, after the reaction was completed, cooled to room temperature, filtered, and the filtrate evaporated slowly at room temperature , After 5-7 days, blocky single crystals were obtained. The yield is about 38%.
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