CN104741068A - Method for synthesizing perovskite LaCoO3 composite oxide material from bagasse - Google Patents
Method for synthesizing perovskite LaCoO3 composite oxide material from bagasse Download PDFInfo
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- CN104741068A CN104741068A CN201510180887.1A CN201510180887A CN104741068A CN 104741068 A CN104741068 A CN 104741068A CN 201510180887 A CN201510180887 A CN 201510180887A CN 104741068 A CN104741068 A CN 104741068A
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Abstract
The invention provides a method for synthesizing a perovskite LaCoO3 composite oxide material from bagasse and relates to the perovskite type composite oxide material. The method comprises the following steps: (1) dissolving lanthanum nitrate and cobalt nitrate into water to form a mixed solution, adding with bagasse, and drying to obtain xerogel; and (2) igniting xerogel obtained in the step (1) to obtain black precursor powder, pre-decomposing black precursor powder in a muffle furnace, and calcining, so as to obtain the perovskite LaCoO3 composite oxide material. The perovskite-structured LaCoO3 composite oxide material is prepared by directly complexing and burning bagasse with metal salt, so that the process is simple, and the cost is low; the method is a novel method for preparing perovskite type nano materials from renewable biomasses.
Description
Technical field
The present invention relates to a kind of perovskite Composite Oxides Materials, especially relate to a kind of bagasse synthesis perovskite LaCoO
3the method of composite oxide material.
Background technology
Living beings, as the reproducible resource of one, more and more show importance in green chemical synthesis, and in recent years, living beings also show unique advantage in green syt nano material.The living beings extracted from plant and microorganism contain abundant active function groups can with metal ion generation reduction.The nano material of successful synthesizing nano-silver, nm of gold, nucleocapsid structure.Zheng Nan etc. utilize the synthesizing porous aluminium oxide of living beings cape jasmine (ZL201110399340.2).Report is had to utilize straw straw to prepare silicon dioxide hybrid materials (Bioresource Technology 101 (2010) 8402 – 8405) recently.Perovskite composite oxide LaCoO
3there is excellent magnetic electricity performance, be widely used in the association areas such as fuel cell, sensor and heterogeneous catalysis.Conventional preparation method mainly contains combustion method, solid phase method, citric acid complex method, sol-gal process, hydro-thermal method, template etc.These method complicated process of preparation, cost is higher.
Summary of the invention
A kind of bagasse is the object of the present invention is to provide to synthesize perovskite LaCoO
3the method of composite oxide material.
The present invention includes following steps:
1) by lanthanum nitrate and cobalt nitrate formation mixed solution soluble in water, then add bagasse, after drying, obtain xerogel;
2) by step 1) xerogel that obtains ignites, and obtain the precursor powder of black, in Muffle furnace after predecomposition, calcining, namely obtains perovskite LaCoO
3composite oxide material.
In step 1) in, the mol ratio of described lanthanum nitrate and cobalt nitrate can be 1: 1, and described water can adopt deionized water; The consumption of described bagasse can be 10% ~ 40% of mixed solution by mass percentage; The temperature of described drying can be 80 ~ 100 DEG C, and the dry time can be 12 ~ 24h; Bagasse discarded after described bagasse can adopt and squeeze the juice is through washing, and pulverize with pulverizer after 105 DEG C of oven dryings to constant weight, screening is 60 ~ 100 object bagasse.
In step 2) in, described in ignite electric furnace can be adopted to ignite; The temperature of described predecomposition can be 400 DEG C, and the time of predecomposition can be 2h; The temperature of described calcining can be 600 ~ 800 DEG C, and the time of calcining can be 4h.
Prepared perovskite LaCoO
3the specific area test of composite oxide material is as follows: the specific area test of nano-perovskite material completes on Micromeritics TriStar 3000 type Full-automatic physical chemical adsorption instrument.Take High Purity Nitrogen as adsorbate, adsorb in liquid nitrogen temperature (77K).Before test, sample vacuumizes process 5h at 150 DEG C, and catalyst amount is about 0.1g.What specific area test adopted is multilayer physical adsorption process, i.e. BET equation.
The present invention adopts bagasse directly and slaine complex-combustion, prepares perovskite structure LaCoO
3composite metal oxide material, technique is simple, and cost is low, is the new method that a kind of renewable biomass prepares calcium-titanium ore type nano material.
Accompanying drawing explanation
Fig. 1 is LaCoO prepared by embodiment 1
3xRD schemes.In FIG, mark ◆ be LaCoO
3.
Fig. 2 is LaCoO prepared by embodiment 1
3nano material scanning electron microscope sem figure.
Detailed description of the invention
Embodiment 1
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 10% 60 object bagasse.Stir, in 80 DEG C of dry 24h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then obtain nano-perovskite material LaCoO through 800 DEG C of roasting 4h
3.
Specific area test is carried out on Micromeritics TriStar 3000 type Full-automatic physical chemical adsorption instrument.Take High Purity Nitrogen as adsorbate, adsorb in liquid nitrogen temperature (77K).Weigh about 0.1g sample, compressing tablet, before test, sample vacuumizes process 5h at 150 DEG C.Specific area is 6.97m
2/ g.
Embodiment 2
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 15% 80 object bagasse.Stir, in 100 DEG C of dry 12h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then through 700 DEG C of roasting 4h, obtain nano-perovskite material LaCoO
3, its specific area is 6.72m
2/ g.
Embodiment 3
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 10% 100 object bagasse.Stir, in 90 DEG C of dry 16h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then through 600 DEG C of roasting 4h, obtain nano-perovskite material LaCoO
3, its specific area is 11.72m
2/ g.
Embodiment 4
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 20% 100 object bagasse.Stir, in 85 DEG C of dry 18h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then through 700 DEG C of roasting 4h, the nano-perovskite material LaCoO obtained
3, its specific area is 8.00m
2/ g.
Embodiment 5
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 30% 80 object bagasse.Stir, in 80 DEG C of dry 20h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then through 700 DEG C of roasting 4h, obtain nano-perovskite material LaCoO
3, its specific area is 9.65m
2/ g.
Embodiment 6
LaCoO
3preparation: by lanthanum nitrate: cobalt nitrate mol ratio is 1: 1.The metal nitrate getting 0.04mol is respectively dissolved in 0.1L deionized water, adds relative to LaCoO
3mass percent be 40% 60 object bagasse.Stir, in 95 DEG C of dry 12h, be heated to burning with electric furnace, the precursor powder obtained, decompose further through 400 DEG C of roasting 2h, then through 750 DEG C of roasting 4h, obtain nano-perovskite material LaCoO
3, its specific area is 8.11m
2/ g.
Claims (9)
1. bagasse synthesis perovskite LaCoO
3the method of composite oxide material, is characterized in that comprising the following steps:
1) by lanthanum nitrate and cobalt nitrate formation mixed solution soluble in water, then add bagasse, after drying, obtain xerogel;
2) by step 1) xerogel that obtains ignites, and obtain the precursor powder of black, in Muffle furnace after predecomposition, calcining, namely obtains perovskite LaCoO
3composite oxide material.
2. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 1) in, the mol ratio of described lanthanum nitrate and cobalt nitrate is 1: 1.
3. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 1) in, described hydromining deionized water.
4. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 1) in, the consumption of described bagasse is 10% ~ 40% of mixed solution by mass percentage.
5. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 1) in, the temperature of described drying is 80 ~ 100 DEG C, and the dry time is 12 ~ 24h.
6. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 1) in, the bagasse that described bagasse is discarded after adopting and squeezing the juice is through washing, and pulverize with pulverizer after 105 DEG C of oven dryings to constant weight, screening is 60 ~ 100 object bagasse.
7. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 2) in, described in ignite adopt electric furnace ignite.
8. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 2) in, the temperature of described predecomposition is 400 DEG C, and the time of predecomposition is 2h.
9. bagasse synthesizes perovskite LaCoO as claimed in claim 1
3the method of composite oxide material, is characterized in that in step 2) in, the temperature of described calcining is 600 ~ 800 DEG C, and the time of calcining is 4h.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186079A (en) * | 2016-06-28 | 2016-12-07 | 郑州轻工业学院 | The preparation method of Ca-Ti ore type lanthanium complex oxide nanotube |
| CN108046339A (en) * | 2017-12-18 | 2018-05-18 | 厦门大学 | A kind of green synthesis method of lanthanum based perovskite |
| CN109317151A (en) * | 2018-11-01 | 2019-02-12 | 南京工业大学 | Preparation method of catalyst for ultraviolet catalytic wet oxidation |
| CN111468131A (en) * | 2020-05-28 | 2020-07-31 | 福建师范大学 | L aCoO with high catalytic oxidation activity3Method for synthesizing catalyst |
| CN112604690A (en) * | 2020-12-07 | 2021-04-06 | 常州大学 | Method for preparing rare earth perovskite/biochar composite material by using agricultural and forestry wastes and application thereof |
| CN112844354A (en) * | 2020-12-23 | 2021-05-28 | 甄崇礼 | Process for producing perovskite compound |
| CN115124003A (en) * | 2022-06-28 | 2022-09-30 | 武汉大学 | Tubular nano metal oxide with cotton fiber as sacrificial template and preparation method thereof |
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| CN102658135A (en) * | 2012-05-02 | 2012-09-12 | 福州大学 | Ruthenium supported perovskite-type-oxide ammonia synthesis catalyst and preparation method thereof |
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| CN102658135A (en) * | 2012-05-02 | 2012-09-12 | 福州大学 | Ruthenium supported perovskite-type-oxide ammonia synthesis catalyst and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186079A (en) * | 2016-06-28 | 2016-12-07 | 郑州轻工业学院 | The preparation method of Ca-Ti ore type lanthanium complex oxide nanotube |
| CN106186079B (en) * | 2016-06-28 | 2017-06-06 | 郑州轻工业学院 | The preparation method of Ca-Ti ore type lanthanium complex oxide nanotube |
| CN108046339A (en) * | 2017-12-18 | 2018-05-18 | 厦门大学 | A kind of green synthesis method of lanthanum based perovskite |
| CN108046339B (en) * | 2017-12-18 | 2019-07-30 | 厦门大学 | A kind of green synthesis method of lanthanum based perovskite |
| CN109317151A (en) * | 2018-11-01 | 2019-02-12 | 南京工业大学 | Preparation method of catalyst for ultraviolet catalytic wet oxidation |
| CN111468131A (en) * | 2020-05-28 | 2020-07-31 | 福建师范大学 | L aCoO with high catalytic oxidation activity3Method for synthesizing catalyst |
| CN111468131B (en) * | 2020-05-28 | 2022-05-24 | 福建师范大学 | LaCoO with high catalytic oxidation activity3Method for synthesizing catalyst |
| CN112604690A (en) * | 2020-12-07 | 2021-04-06 | 常州大学 | Method for preparing rare earth perovskite/biochar composite material by using agricultural and forestry wastes and application thereof |
| CN112604690B (en) * | 2020-12-07 | 2023-05-23 | 常州大学 | Method for preparing rare earth perovskite/biochar composite material by utilizing agricultural and forestry waste and application thereof |
| CN112844354A (en) * | 2020-12-23 | 2021-05-28 | 甄崇礼 | Process for producing perovskite compound |
| CN115124003A (en) * | 2022-06-28 | 2022-09-30 | 武汉大学 | Tubular nano metal oxide with cotton fiber as sacrificial template and preparation method thereof |
| CN115124003B (en) * | 2022-06-28 | 2023-05-19 | 武汉大学 | Tubular nano metal oxide with cotton fiber as sacrificial template and preparation method thereof |
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