Preparation method of strip cellulose gel mesoporous material
A cellulose gel and gel mesoporous technology, which is applied in chemical instruments and methods, catalyst carriers, physical/chemical process catalysts, etc., can solve the problems of low operating temperature, high density of inorganic carriers, and poor stability, and achieve good results. Practicality, simple method, high stability effect
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Embodiment 1
[0025] Add 1 g of wood pulp cellulose to 65% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at 10°C for 1 h. The above liquid-solid material was placed in a water bath at 70° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 Slowly inject the aqueous solution into water and let it stand for 24 hours to obtain a strip-shaped cellulose gel. Wash the strip-shaped cellulose gel with water until Cl-free - Finally, put it into a hydrothermal synthesis kettle, and carry out hydrothermal reaction under the conditions of pH=8 and temperature 170°C, and the reaction time is 6h. After the reaction is over, put the strip-shaped cellulose into an ultra-low temperature refrigerator. After freezing, place the sample in a freeze dryer. After drying, a new strip-shaped cellulose gel mesoporous material is obtained, such as figure 1 shown.
[0026] The ASAP 2020M specific surface are...
Embodiment 2
[0030] Add 1 g of wood pulp cellulose to 67% (wt%) ZnCl 2 In the aqueous solution, pretreat for 3 hours in a low-temperature bath at -10°C. The above liquid-solid material was placed in a water bath at 90° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 Slowly inject the aqueous solution into water and let it stand for 24 hours to obtain a strip-shaped cellulose gel. Wash the strip-shaped cellulose gel with water until Cl-free - Finally, put it into a hydrothermal synthesis kettle, and carry out hydrothermal reaction under the conditions of pH=7 and temperature 190° C., and the reaction time is 4 hours. After the reaction, put the strip-shaped cellulose into an ultra-low temperature refrigerator, place the sample in a freeze dryer after freezing, and obtain a strip-shaped nano-ZnO / cellulose gel mesoporous material after drying.
[0031] The ASAP 2020M specific surface area and pore volume a...
Embodiment 3
[0034] Add 1 g of wood pulp cellulose to 70% (wt%) ZnCl 2 In aqueous solution, pretreatment in a low-temperature bath at 10°C for 1 h. The above liquid-solid material was placed in a water bath at 60° C. and heated and stirred to obtain a transparent and uniform cellulose solution. Use a syringe to dissolve the ZnCl of cellulose 2 Slowly inject the aqueous solution into water and let it stand for 24 hours to obtain a strip-shaped cellulose gel. Wash the strip-shaped cellulose gel with water until Cl-free - Finally, put it into a hydrothermal synthesis kettle, and carry out hydrothermal reaction under the conditions of pH=10 and temperature of 150° C., and the reaction time is 10 h. After the reaction, put the strip-shaped cellulose into an ultra-low temperature refrigerator, place the sample in a freeze dryer after freezing, and obtain a strip-shaped nano-ZnO / cellulose gel mesoporous material after drying.
[0035] The ASAP 2020M specific surface area and pore volume analy...
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