CN101492170A - Method of manufacturing mesoporous nano- aluminum oxide - Google Patents
Method of manufacturing mesoporous nano- aluminum oxide Download PDFInfo
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- CN101492170A CN101492170A CNA2009100466636A CN200910046663A CN101492170A CN 101492170 A CN101492170 A CN 101492170A CN A2009100466636 A CNA2009100466636 A CN A2009100466636A CN 200910046663 A CN200910046663 A CN 200910046663A CN 101492170 A CN101492170 A CN 101492170A
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- aluminum oxide
- mesoporous nano
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Abstract
The invention belongs to the technical field of preparing a nanometer material, and in particular relates to a method for preparing a mesoporous nanometer aluminum oxide. The method comprises that: a precipitator solution is added in an inorganic aluminate solution; after certain conditions are met in the reaction, a surfactant is added as a template agent; and under certain conditions, a precursor obtained in the reaction is aged, dried and washed, and the obtained precursor powder is calcined to obtain the mesoporous nanometer aluminum oxide. The method has the advantages of simple process, safe operation, low production cost and the suitability for industrialized production; and the obtained mesoporous nanometer aluminum oxide has the advantages of higher specific surface area, narrower pore size distribution, larger pore size and pore volume, and high thermal stability, and can be used as a good carrier in adsorption and catalysis processes and has important values in practical application.
Description
Technical field
The invention belongs to the nano material preparation technical field, be specifically related to a kind of preparation method of mesoporous nano-aluminum oxide.
Background technology
The meso-porous nano material is as the novel functional material of a class, owing to have higher specific surface area, orderly pore passage structure, adjustable aperture, and characteristics such as good chemistry and thermostability, be subjected to extensive concern.Alumina material is the most common and most widely used a kind of absorption and catalytic carrier.Traditional activated alumina is with γ-Al
2O
3The most common, most widely used general, but because it belongs to poromerics, pore size distribution broad and heterogeneity have limited its application in fields such as synthetic, catalysis to a certain extent.Therefore, syntheticly have bigger serface, large pore volume, pore size distribution is narrow and the mesoporous nano-aluminum oxide material of homogeneous has important application prospects.
Document Yuan, Q., et al., Facile synthesis for ordered mesoporous gamma-aluminas with highthermal stability.Journal of the American Chemical Society, 2008.130 (11): p.3465-3472, introduced a kind of order mesoporous γ-Al based on Prepared by Sol Gel Method
2O
3The preparation method.With the non-ionic block copolymer is template, is the aluminium source with organic aluminium alcoholates, and synthetic duct becomes six squares of high-sequential, and specific surface area reaches 400m
2/ g.The shortcoming of this method is that aluminium source and template are all expensive, and the inflammable danger in aluminium source, can't be applicable to large-scale industrial production.The present invention adopts template, normal temperature is synthetic down, so that common various tensio-active agents---cetyl trimethylammonium bromide, P123/F127, lauric acid/palmitinic acid etc. are template, and relatively inexpensive and safe inorganic aluminate is the aluminium source, prepares than bigger serface, than large pore volume with the aperture is narrower and the meso-porous nano level γ-Al of distribution homogeneous
2O
3, have the potential actual application value.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of mesoporous nano-aluminum oxide.
The preparation method of the mesoporous nano-aluminum oxide that the present invention proposes, concrete steps are as follows:
(1) the aluminium source is dissolved in the distilled water,, obtains colloidal solution A then to wherein adding HCl;
(2) in tensio-active agent, add alcoholic solvent, stir, obtain solution B;
(3) solution B is added step (1) gained colloidal solution A under whipped state, stir, aging, filter, washing, drying, temperature programming, and, promptly get desired product at this roasting temperature.
Among the present invention, described aluminium source is a sodium aluminate.
Among the present invention, described tensio-active agent can adopt in cats product, nonionogenic tenside or the anion surfactant any.Wherein, cats product can adopt cetyl trimethylammonium bromide (CTAB), and nonionogenic tenside can adopt segmented copolymer P123/F127, and anion surfactant can adopt lauric acid/palmitinic acid.
Among the present invention, the mol ratio in described cats product and aluminium source is 0.5: 1～1: 1, and the mol ratio in non-ionic surface template and aluminium source is 0.01: 1～0.1: 1, and the mol ratio in anionic surface template and aluminium source is 0.1: 1～0.5: 1.
Among the present invention, the temperature rise rate of temperature programming is 5～10 ℃/min described in the step (3).
Among the present invention, maturing temperature is 500～600 ℃ described in the step (3), and roasting time is 3～5h.
Beneficial effect of the present invention is: the mesoporous nano-aluminum oxide of the present invention's preparation has higher specific surface area, narrower bigger pore volume and the aperture is narrower and the characteristics of distribution homogeneous.Present method is at room temperature synthetic, roasting in the air, and avoid using expensive organoaluminum source, working method is simple.Products obtained therefrom can be used as the good carrier in absorption, the catalytic process, has important application value.
Description of drawings
Fig. 1 is the N of the synthetic method preparation of embodiment 1 described mesoporous nano-aluminum oxide
2The adsorption-desorption isothermal map.
Fig. 2 is the pore size distribution curve figure of the synthetic method preparation of embodiment 1 described mesoporous nano-aluminum oxide.
Fig. 3 is the N of the synthetic method preparation of embodiment 2 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.
Fig. 4 is the pore size distribution curve figure of the synthetic method preparation of embodiment 2 described mesoporous nano-aluminum oxides.
Fig. 5 is the N of the synthetic method preparation of embodiment 3 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.
Fig. 6 is the pore size distribution curve figure of the synthetic method preparation of embodiment 3 described mesoporous nano-aluminum oxides.
Fig. 7 is the N of the synthetic method preparation of embodiment 4 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.
Fig. 8 is the pore size distribution curve figure of the synthetic method preparation of embodiment 4 described mesoporous nano-aluminum oxides.
Fig. 9 is the N of the synthetic method preparation of embodiment 5 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.
Figure 10 is the pore size distribution curve figure of the synthetic method preparation of embodiment 5 described mesoporous nano-aluminum oxides.
Embodiment
Further specify the present invention below by embodiment.
The concrete preparation process of embodiment 1 is as follows:
Get the 8.2g sodium aluminate in a beaker, add 50ml distilled water and stirring and dissolving, slowly dropwise add 9.12mlHCl then, obtain colloidal solution A.Get the 32.8g cetyl trimethylammonium bromide in a beaker, add the 300ml dehydrated alcohol, constantly be stirred to consoluet clear solution B.B solution is added solution A under whipped state, continue to stir 1 hour.At room temperature dry afterwards, the pressed powder that obtains ground be placed in the encloses container, crystallization is 2 days under 90 ℃ of autogenous pressure conditions, filters, and uses absolute ethanol washing, then 60 ℃ of dryings 1 day.The powder that obtains is placed retort furnace, and (10 ℃ of temperature rise rates/min) to 600 ℃, and keeping 4 hours, cooling is taken out and is obtained this mesoporous nano-aluminum oxide powder with temperature programming.The main physico-chemical property of the mesoporous nano-aluminum oxide sample that obtains is: specific surface area 202m
2/ g, pore volume 0.46cm
3/ g, mean pore size 6.43nm.
Fig. 1 is the N of the synthetic method preparation of embodiment 1 described mesoporous nano-aluminum oxide
2The adsorption-desorption isothermal map.Present typical Langmuir IV type adsorption curve with present embodiment synthetic sample as can be seen.At N
2(P/P when relative pressure is low
0＜0.6), the absorption of sample is N
2The unsaturated absorption of the unit molecule that on the mesopore hole wall, takes place; Rising (0.8＞P/P along with relative pressure
0＞0.6), N
2The crooked corner feature that in even mesopore duct, the capillary condensation effect takes place and cause; Absorption platform (P/P subsequently
0＞0.8) shows N
2Absorption in mesopore reaches balance.The specific surface area that calculates prepared sample through BET formula is 202m
2/ g.
Fig. 2 is the pore size distribution curve figure of the synthetic method preparation of embodiment 1 described mesoporous nano-aluminum oxide.The mesoporous nano-aluminum oxide pore size distribution of present embodiment preparation is narrow and be unimodal distribution as seen from the figure, mainly concentrates between 2nm～8nm.The pore volume that calculates prepared sample through the BJH method is 0.46cm
3/ g, mean pore size is 6.43nm.
The concrete preparation process of embodiment 2 is as follows:
Get the 8.2g sodium aluminate in a beaker, add 50ml distilled water and stirring and dissolving, slowly dropwise add 9.12mlHCl then, obtain colloidal solution A.Get 7.19g segmented copolymer P123 in a beaker, add the 300ml dehydrated alcohol, constantly be stirred to consoluet clear solution B.Other steps are with embodiment 1.The main physico-chemical property of the mesoporous nano-aluminum oxide sample that obtains is: specific surface area 229m
2/ g, pore volume 0.44cm
3/ g, mean pore size 5.92nm.
Fig. 3 is the N of the synthetic method preparation of embodiment 2 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.Present typical Langmuir IV type adsorption curve with present embodiment synthetic sample as can be seen.At N
2(P/P when relative pressure is low
0＜0.6), the absorption of sample is N
2The unsaturated absorption of the unit molecule that on the mesopore hole wall, takes place; Rising (0.85＞P/P along with relative pressure
0＞0.6), N
2The crooked corner feature that in even mesopore duct, the capillary condensation effect takes place and cause; Absorption platform (P/P subsequently
0＞0.85) shows N
2Absorption in mesopore reaches balance.The specific surface area that calculates prepared sample through BET formula is 229m
2/ g.
Fig. 4 is the pore size distribution curve figure of the synthetic method preparation of embodiment 2 described mesoporous nano-aluminum oxides.The mesoporous nano-aluminum oxide pore size distribution of present embodiment preparation is narrow and be unimodal distribution as seen from the figure, mainly concentrates between 3nm～10nm.The pore volume that calculates prepared sample through the BJH method is 0.44cm
3/ g, mean pore size is 5.92nm.
The concrete preparation process of embodiment 3 is as follows:
Get the 8.2g sodium aluminate in a beaker, add 50ml distilled water and stirring and dissolving, slowly dropwise add 9.12mlHCl then, obtain colloidal solution A.Get 9.96g segmented copolymer F127 in a beaker, add the 300ml dehydrated alcohol, constantly be stirred to consoluet clear solution B.Other steps are with embodiment 1.The main physico-chemical property of the mesoporous nano-aluminum oxide sample that obtains is: specific surface area 239m
2/ g, pore volume 0.50cm
3/ g, mean pore size 6.62nm.
Fig. 5 is the N of the synthetic method preparation of embodiment 3 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.Present typical Langmuir IV type adsorption curve with present embodiment synthetic sample as can be seen.At N
2(P/P when relative pressure is low
0＜0.6), the absorption of sample is N
2The unsaturated absorption of the unit molecule that on the mesopore hole wall, takes place; Rising (0.9＞P/P along with relative pressure
0＞0.6), N
2The crooked corner feature that in even mesopore duct, the capillary condensation effect takes place and cause; Absorption platform (P/P subsequently
0＞0.9) shows N
2Absorption in mesopore reaches balance.The specific surface area that calculates prepared sample through BET formula is 239m
2/ g.
Fig. 6 is the pore size distribution curve figure of the synthetic method preparation of embodiment 3 described mesoporous nano-aluminum oxides.The mesoporous nano-aluminum oxide pore size distribution of present embodiment preparation is narrow and be unimodal distribution as seen from the figure, mainly concentrates between 4nm～11nm.The pore volume that calculates prepared sample through the BJH method is 0.50cm
3/ g, mean pore size is 6.62nm.
The concrete preparation process of embodiment 4 is as follows:
Get the 8.2g sodium aluminate in a beaker, add 50ml distilled water and stirring and dissolving, slowly dropwise add 9.12mlHCl then, obtain colloidal solution A.Get the 6.01g lauric acid in a beaker, add the 300ml dehydrated alcohol, constantly be stirred to consoluet clear solution B.Other steps are with embodiment 1.The main physico-chemical property of the mesoporous nano-aluminum oxide sample that obtains is: specific surface area 251m
2/ g, pore volume 0.31cm
3/ g, mean pore size 3.95nm.
Fig. 7 is the N of the synthetic method preparation of embodiment 4 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.Present typical Langmuir IV type adsorption curve with present embodiment synthetic sample as can be seen.At N
2(P/P when relative pressure is low
0＜0.45), the absorption of sample is N
2The unsaturated absorption of the unit molecule that on the mesopore hole wall, takes place; Rising (0.75＞P/P along with relative pressure
0＞0.45), N
2The crooked corner feature that in even mesopore duct, the capillary condensation effect takes place and cause; Absorption platform (0.95＞P/P subsequently
0＞0.75) shows N
2Absorption in mesopore reaches balance.(P/P when relative pressure is higher
0＞0.95) the segment hop of Chu Xianing then is N
2Between macrobead, produced the result of cohesion.The specific surface area that calculates prepared sample through BET formula is 251m
2/ g.
Fig. 8 is the pore size distribution curve figure of the synthetic method preparation of embodiment 4 described mesoporous nano-aluminum oxides.The mesoporous nano-aluminum oxide pore size distribution of present embodiment preparation is narrow and be unimodal distribution as seen from the figure, mainly concentrates between 3nm～7nm.The pore volume that calculates prepared sample through the BJH method is 0.31cm
3/ g, mean pore size is 3.95nm.
The concrete preparation process of embodiment 5 is as follows:
Get the 8.2g sodium aluminate in a beaker, add 50ml distilled water and stirring and dissolving, slowly dropwise add 9.12mlHCl then, obtain colloidal solution A.Get the 7.69g palmitinic acid in a beaker, add the 300ml dehydrated alcohol, constantly be stirred to consoluet clear solution B.Other steps are with embodiment 1.The main physico-chemical property of the mesoporous nano-aluminum oxide sample that obtains is: specific surface area 182m
2/ g, pore volume 0.26cm
3/ g, mean pore size 4.82nm.
Fig. 9 is the N of the synthetic method preparation of embodiment 5 described mesoporous nano-aluminum oxides
2The adsorption-desorption isothermal map.Present typical Langmuir IV type adsorption curve with present embodiment synthetic sample as can be seen.At N
2(P/P when relative pressure is low
0＜0.55), the absorption of sample is N
2The unsaturated absorption of the unit molecule that on the mesopore hole wall, takes place; Rising (0.85＞P/P along with relative pressure
0＞0.55), N
2The crooked corner feature that in even mesopore duct, the capillary condensation effect takes place and cause; Absorption platform (P/P subsequently
0＞0.85) shows N
2Absorption in mesopore reaches balance.The specific surface area that calculates prepared sample through BET formula is 182m
2/ g.
Figure 10 is the pore size distribution curve figure of the synthetic method preparation of embodiment 5 described mesoporous nano-aluminum oxides.The mesoporous nano-aluminum oxide pore size distribution of present embodiment preparation is narrow and be unimodal distribution as seen from the figure, mainly concentrates between 3nm～7nm.The pore volume that calculates prepared sample through the BJH method is 0.26cm
3/ g, mean pore size is 4.82nm.
Claims (6)
1, a kind of preparation method of mesoporous nano-aluminum oxide is characterized in that concrete steps are as follows:
(1) the aluminium source is dissolved in the distilled water,, obtains colloidal solution A then to wherein adding HCl;
(2) in tensio-active agent, add alcoholic solvent, stir, obtain solution B;
(3) solution B is added step (1) gained colloidal solution A under whipped state, stir, aging, filter, washing, drying, temperature programming, and, promptly get desired product at this roasting temperature.
2, the preparation method of mesoporous nano-aluminum oxide according to claim 1 is characterized in that described aluminium source is a sodium aluminate.
3, the preparation method of mesoporous nano-aluminum oxide according to claim 1 is characterized in that described tensio-active agent can adopt in cats product, nonionogenic tenside or the anion surfactant any.
4, the preparation method of mesoporous nano-aluminum oxide according to claim 3, the mol ratio that it is characterized in that described cats product and aluminium source is 0.5: 1～1: 1, the mol ratio in non-ionic surface template and aluminium source is 0.01: 1～0.1: 1, and the mol ratio in anionic surface template and aluminium source is 0.1: 1～0.5: 1.
5, the preparation method of mesoporous nano-aluminum oxide according to claim 3, the temperature rise rate that it is characterized in that temperature programming described in the step (3) is 5～10 ℃/min.
6, the preparation method of mesoporous nano-aluminum oxide according to claim 1 is characterized in that maturing temperature is 500～600 ℃ described in the step (3), and roasting time is 3～5h.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829552A (en) * | 2010-06-08 | 2010-09-15 | 浙江大学 | Preparation method of mesoporous alumina catalyst |
| CN101850244A (en) * | 2010-06-08 | 2010-10-06 | 浙江大学 | Preparation method of Al2O3-SiO3 solid acid catalyst in nuclear shell structure |
| CN102219242A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Method for preparing mesoporous aluminum oxide |
| CN103011219A (en) * | 2012-11-29 | 2013-04-03 | 中国科学院过程工程研究所 | Mesoporous alumina and preparation method thereof |
| CN103159243A (en) * | 2013-03-07 | 2013-06-19 | 吉林市品前化工技术开发有限公司 | Method for producing active alumina by common aluminum-containing compound |
| CN103539173A (en) * | 2013-10-06 | 2014-01-29 | 太原理工大学 | Highly thermostable and ordered mesoporous alumina material and preparation method thereof |
| CN104741152A (en) * | 2015-02-12 | 2015-07-01 | 柳州豪祥特科技有限公司 | Preparation method of mesoporous alumina for catalyst |
| CN110732324A (en) * | 2018-07-19 | 2020-01-31 | 中国石油天然气股份有限公司 | Preparation method of alkane isomerization catalyst of palladium-supported ordered mesoporous alumina |
| CN113443851A (en) * | 2021-06-23 | 2021-09-28 | 贵州石博士科技股份有限公司 | Composite solid nano-based early strength agent and preparation method thereof |
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2009
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102219242A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Method for preparing mesoporous aluminum oxide |
| CN102219242B (en) * | 2010-04-15 | 2013-01-09 | 中国石油化工股份有限公司 | Method for preparing mesoporous aluminum oxide |
| CN101829552A (en) * | 2010-06-08 | 2010-09-15 | 浙江大学 | Preparation method of mesoporous alumina catalyst |
| CN101850244A (en) * | 2010-06-08 | 2010-10-06 | 浙江大学 | Preparation method of Al2O3-SiO3 solid acid catalyst in nuclear shell structure |
| CN101850244B (en) * | 2010-06-08 | 2011-09-07 | 浙江大学 | Preparation method of Al2O3-SiO3 solid acid catalyst in nuclear shell structure |
| CN101829552B (en) * | 2010-06-08 | 2011-11-09 | 浙江大学 | Preparation method of mesoporous alumina catalyst |
| CN103011219A (en) * | 2012-11-29 | 2013-04-03 | 中国科学院过程工程研究所 | Mesoporous alumina and preparation method thereof |
| CN103011219B (en) * | 2012-11-29 | 2015-07-01 | 中国科学院过程工程研究所 | Mesoporous alumina and preparation method thereof |
| CN103159243A (en) * | 2013-03-07 | 2013-06-19 | 吉林市品前化工技术开发有限公司 | Method for producing active alumina by common aluminum-containing compound |
| CN103539173A (en) * | 2013-10-06 | 2014-01-29 | 太原理工大学 | Highly thermostable and ordered mesoporous alumina material and preparation method thereof |
| CN103539173B (en) * | 2013-10-06 | 2014-12-03 | 太原理工大学 | Highly thermostable and ordered mesoporous alumina material and preparation method thereof |
| CN104741152A (en) * | 2015-02-12 | 2015-07-01 | 柳州豪祥特科技有限公司 | Preparation method of mesoporous alumina for catalyst |
| CN110732324A (en) * | 2018-07-19 | 2020-01-31 | 中国石油天然气股份有限公司 | Preparation method of alkane isomerization catalyst of palladium-supported ordered mesoporous alumina |
| CN110732324B (en) * | 2018-07-19 | 2022-11-04 | 中国石油天然气股份有限公司 | Preparation method of alkane isomerization catalyst of palladium-supported ordered mesoporous alumina |
| CN113443851A (en) * | 2021-06-23 | 2021-09-28 | 贵州石博士科技股份有限公司 | Composite solid nano-based early strength agent and preparation method thereof |
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