Zeolite imidazole-like skeleton-mesoporous silica composite material and preparation methods thereof
A technology of zeolite imidazole framework and composite materials, applied in the field of material chemistry, to achieve the effect of improving hydrothermal stability
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Embodiment 1
[0029] Cetyltrimethylammonium chloride (CTAB, 2.7mmol) was dissolved in 70mL ammonium hydroxide and 410mL deionized water solution, pH = 12, stirred for 30min, and dissolved. In addition, 2-methylimidazole (12.36g, 0.15mol) and Zn(NO 3 ) 2 ·6H 2O (9.84mmol) was dissolved in 48mL deionized water respectively. After the dissolution was completed, it was mixed with the previous solution, stirred vigorously for 10 min, and finally ethyl orthosilicate (TEOS, 35.8 mmol) was slowly added dropwise, and stirred for 8 hours. Wash and filter with deionized water three times, and dry for later use. Remove CTAB by solvent dissolution method, add 100mL acetic acid and ethanol solution mixed detergent (acetic acid: ethanol = 1:6) to the dried solid powder, wash three times, filter, and dry for later use.
[0030] The XRD spectra of gained ZIF-8 / MCM-41 composite material in 5-40 degree, 2-8 degree scope are respectively as follows figure 1 As shown in (b) and (c), by comparing figure 1 ...
Embodiment 2
[0032] Cetyltrimethylammonium chloride (CTAB, 2.7mmol) was dissolved in 70mL ammonium hydroxide and 410mL deionized water solution, pH = 12, stirred for 30min, and dissolved. In addition, 2-methylimidazole (0.15mol) and Co(NO 3 ) 2 ·6H 2 O (9.84mmol) was dissolved in 48mL deionized water respectively. After the dissolution was completed, it was mixed with the previous solution, stirred vigorously for 10 min, and finally ethyl orthosilicate (TEOS, 35.8 mmol) was slowly added dropwise, and stirred for 12 hours. Wash and filter with deionized water three times, and dry for later use. Remove CTAB by solvent dissolution method, add 100mL of detergent mixed with acetic acid and ethanol solution (acetic acid:ethanol=1:4) to the dried solid powder, wash three times, filter, and dry for later use.
[0033] The transmission electron microscope photograph of gained ZIF-8 / MCM-41 composite material is as figure 2 As shown in Figure b, it can be seen from this figure that the composit...
Embodiment 3
[0035] Cetyltrimethylammonium chloride (CTAB, 1.35mmol) was dissolved in 60mL ammonium hydroxide and 410mL deionized water solution, pH = 11.5, stirred for 30min, and dissolved. In addition, 2-methylimidazole (0.078mol) and Zn(NO 3 ) 2 ·6H 2 O (9.84mmol) was dissolved in 48mL deionized water respectively. After the dissolution was completed, it was mixed with the previous solution, stirred vigorously for 10 min, and finally ethyl orthosilicate (TEOS, 17.9 mmol) was slowly added dropwise, and stirred for 24 hours. Wash and filter with deionized water three times, and dry for later use. Remove CTAB by solvent dissolution method, weigh 1 g of the dried solid, add 100 mL of detergent mixed with acetic acid and ethanol solution (acetic acid: ethanol = 1:6), wash three times, filter, and dry for later use.
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