CN104528671A - Preparation method of porous boron nitride nanofibers - Google Patents

Preparation method of porous boron nitride nanofibers Download PDF

Info

Publication number
CN104528671A
CN104528671A CN201510026727.1A CN201510026727A CN104528671A CN 104528671 A CN104528671 A CN 104528671A CN 201510026727 A CN201510026727 A CN 201510026727A CN 104528671 A CN104528671 A CN 104528671A
Authority
CN
China
Prior art keywords
boron nitride
porous boron
preparation
hour
melamine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510026727.1A
Other languages
Chinese (zh)
Other versions
CN104528671B (en
Inventor
林靖
许璐璐
黄阳
李�杰
王伟佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei University of Technology
Original Assignee
Hebei University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei University of Technology filed Critical Hebei University of Technology
Priority to CN201510026727.1A priority Critical patent/CN104528671B/en
Publication of CN104528671A publication Critical patent/CN104528671A/en
Application granted granted Critical
Publication of CN104528671B publication Critical patent/CN104528671B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a preparation method of porous boron nitride nanofibers. The preparation method mainly utilizes a three-step synthesis method, namely (1) synthesizing melamine diboronic acid precursor powder from boric acid and melamine in a hydrothermal manner; (2) rapidly freezing and cooling a hot water solution of a melamine diboronic acid precursor with liquid nitrogen by virtue of a freeze-drying method, then drying, and synthesizing melamine diboronic acid nanofibers; and (3) carrying out high-temperature thermal cracking on the melamine diboronic acid nanofibers in protective atmosphere, so as to obtain the porous boron nitride nanofibers. According to the preparation method, molecular crystals of melamine diboronic acid are rapidly separated and nucleated by virtue of a freeze drying technique, so that the growth of the crystals is avoided; the diameters of the prepared porous boron nitride nanofibers reach a nanometer scale, and the porous boron nitride nanofibers are high in purity, uniform in shape, high in slenderness ratio and large in specific surface area.

Description

A kind of preparation method of porous boron nitride nanofiber
Technical field
Technical scheme of the present invention relates to boron nitride nanometer material technology synthesis field, is specially a kind of synthetic method of porous boron nitride nanofiber.
Background technology
The molecular formula of hexagonal boron nitride crystal is BN, it is a kind of layer structure material by the similar graphite of nitrogen (N) atom and boron (B) atomic building, there is excellent electrical insulating property, high temperature resistant, anti-oxidant, resistance to chemical attack, thermal conductivity are high, are widely used in the high-tech areas such as machinery, metallurgy, electronics, aerospace.
To be a class form the boron nitride nanometer filamentary material of network structure by through or blind hole hole mutually with porous hexagonal nanometer boron nitride fiber.Porous boron nitride nanofiber integrates the advantage of porous boron nitride and nanofiber, not only there is large specific surface area, abundant pore space structure, and there is excellent mechanical property, chemical stability and antioxidant property, thus have broad application prospects in water treatment, selective gas absorption and support of the catalyst etc.
In recent years, a lot of work is devoted to control synthesizing porous BN structured material.2002, the people such as C.Tang adopt platinum, and as catalyzer, auxiliary to have synthesized specific surface area be 789m 2the collapse BN nanotube (C.C.Tang, Y.Bando, X.X.Ding, S.R.Qi, D.J.Golberg, J.Am.Chem.Soc., 2002,124,14550-14551) of/g.2012, the people such as D.Cui adopted NH 4bF 4, NaN 3be raw material with sulphur powder, in autoclave, synthesized specific surface area is 215m 2the BN hollow micron ball (G.Lian, X.Zhang, S.Zhang, D.Liu, D.Cui, Q.Wang, Energy Environ.Sci., 2012,5,7072-7080) of/g.2013, the people such as Q.Weng have employed boric acid and trimeric cyanamide as presoma, and at 1000 DEG C, ammonification prepares specific surface area up to 1488m 2the porous BN micro belt (Q.Weng, X.Wang, C.Zhi, Y.Bando, D.Golberg, ACS Nano, 2013,7,1558-1565) of/g.Subsequently, the people such as Australian Y.Chen reports the research of porous BN nanometer sheet in water treatment.They adopt boron trioxide and Guanidinium hydrochloride to be that at high temperature to have prepared specific surface area be 1427m to raw material 2the porous BN nanometer sheet (W.Lei, D.Portehault, D.Liu, S.Qin, Y.Chen, Nat.Commun., 2013,4,1777) of/g.After this, the people such as Shandong University D.Cui adopts solvent-thermal method, with H 4bF 4, NaN 3for raw material, CS 2for catalyzer, in autoclave, prepare the superfine nano porous BN fiber (G.Lian, X.Zhang, H.Si, J.Wang, D.Cui, Q.Wang, ACSAppl.Mater.Interfaces, 2013,5,12773-12778) that diameter is about 8nm.Aforesaid method also exists preparation complexity, productive rate is low, cost is high, need the shortcomings such as use toxic chemical, is not suitable for large-scale production.A kind of synthetic method (patent No. ZL201210475879.6) of porous hexagonal boron nitride fiber with boric acid and trimeric cyanamide for raw material; adopt two-step synthesis method; first use the presoma of hydrothermal synthesis of stephanoporate hexagonal boron nitride fiber, then under protective atmosphere, high temperature pyrolysis obtains nitride porous boron fibre.But the Fibre diameter that this method obtains is 0.2-7 micron, length is 20-200 micron, and length-to-diameter ratio is 2-1000, pattern heterogeneity.Up to the present, also do not have a kind ofly to prepare the green of nitride porous boron fibre, the method for low cost of diameter in nanometer scale.
Summary of the invention
Technical problem to be solved by this invention is: higher for current porous boron nitride technology of preparing cost, to need use toxic raw materials, the nanofiber with high length-diameter ratio that yields poorly, can not obtain deficiency, the porous boron nitride nanofiber green, low cost, high yield and the high-quality preparation method that provide a kind of diameter to be less than 100 nanometers.Freeze Drying Technique of the present invention achieves melamine hypoboric acid molecular crystal presoma and separate out nucleation rapidly in the process of cooling, avoid growing up of crystal, prepared porous boron nitride Fibre diameter reaches nanometer scale, and purity is high, pattern is homogeneous, length-to-diameter ratio is high, specific surface area is large.
Technical scheme of the present invention is:
A preparation method for porous boron nitride nanofiber, comprises the steps:
(1) by trimeric cyanamide and boric acid water-soluble, the mixing solutions of obtained trimeric cyanamide-boric acid-water, its concentration is that every ml water contains 0.005-0.05 gram of trimeric cyanamide and 0.005-0.5 gram of boric acid, stir the reactor added after 1-3 hour with reflux, preheating 80-95 DEG C makes it dissolve and is incubated 2-15 hour; Subsequently solution is cooled to 15-30 DEG C, speed of cooling is per minute 1-50 DEG C, has throw out to separate out, and keeps this temperature to place 5-10 hour, filters and obtain solid sediment;
(2) throw out obtained in step (1) is put into 75-95 DEG C of drying baker, insulation 3-8 hour, obtains white solid;
(3) be added to the water by the white solid obtained in step (2), its concentration is that every ml water adds 0.005-0.01 gram of white solid, and preheating 70-90 DEG C makes it dissolve and is incubated 2-4 hour;
(4) add in spraying plant by the solution of preparation in step (3), be equipped with in the container of liquid nitrogen through being sprayed to, solution quick freeze obtains white solid; In freeze drier, vacuum freezing is drained subsequently, and the hold-time is 48-72 hour, obtains White Flocculus;
(5) White Flocculus will obtained in step (4), 900-1500 DEG C of thermal treatment under protective atmosphere, temperature rise rate is per minute 1-20 DEG C, and soaking time is 2-6 hour, at protective atmosphere borehole cooling.Obtain white solid matter and be porous boron nitride nanofiber.
Protective atmosphere described in previous step (5) is argon gas or nitrogen.
Protective atmosphere in previous step (5) be argon gas or nitrogen time, gas flow rate is 50-500 milliliter/per minute.
Mechanism of the present invention: raw material trimeric cyanamide and boric acid are dissolved in the 80-95 DEG C of aqueous solution, separates out through cooling, filters and obtain melamine hypoboric acid molecular crystal precursor powder (step 1,2) after drying; Precursor powder is dissolved in the 70-90 DEG C of aqueous solution, in the process that spraying subsequently and liquid nitrogen cool fast, melamine hypoboric acid molecular crystal separates out nucleation fast from solution, avoid growing up of crystal, define the white solid containing a large amount of melamine hypoboric acid nanofiber, through lyophilize, the ice in white solid is distilled, obtain cotton-shaped melamine hypoboric acid nanofiber (step 3,4); In high-temperature heat treatment process subsequently, melamine hypoboric acid nanofiber decomposes, and discharges a large amount of CO 2, NH 3deng gas, final formation porous boron nitride nanofiber (step 5).
The invention has the beneficial effects as follows:
1. the product that the inventive method obtains is pure phase high length-diameter ratio boron nitride nanometer fiber.The diffraction peak of XRD spectra (Fig. 1) is clear, is staggered floor boron nitride, does not have the diffraction peak of other dephasigns to occur; The diameter of the boron nitride nanometer fiber prepared by SEM and TEM figure (Fig. 2 and Fig. 3) display is about 20-50 nanometer, and length is about 10-30 micron, and length-to-diameter ratio is up to 200-1500, and product morphology is homogeneous, purity about 95%.Fig. 4 is that the high resolution TEM of product schemes, and display boron nitride nanometer fiber is vesicular structure.Fig. 5 shows the adsorption and desorption thermoisopleth of nitrogen under the porous boron nitride nanofiber low temperature that present method obtains.
2. the inventive method adopts boric acid and trimeric cyanamide to be raw material; through atmospheric pressure reflux and lyophilize obtains melamine hypoboric acid nanofiber as presoma; at high temperature heating is obtained; overcome the particular requirements such as high-pressure reactor, toxic raw materials or the noble metal catalyst that existing porous boron nitride synthetic technology requires usually; reduce energy consumption and production cost; method is nontoxic, reliable, is applicable to the mass-producing synthesis of porous boron nitride nanofiber.
3. raw material of the present invention is boric acid and trimeric cyanamide, except distilled water is without other additives in preparation process, ensure that the purity of product.
4. the porous boron nitride nanofiber pattern of the present invention's synthesis is homogeneous, and diameter Distribution is 20-50 nanometer, and length is 10-30 micron, and length-to-diameter ratio is up to 200-1500, and specific surface area is high.This diameter can be used as polymeric additive strengthen its heat conductivility at nanometer scale, the nitride porous boron fibre with high purity, high length-diameter ratio and high-specific surface area, also can be applied in water treatment, selective gas absorption and support of the catalyst etc.Porous boron nitride nanofiber synthesized by the present invention micron order product of comparing patent ZL201210475879.6 has the adsorption efficiency of adsorption rate and Geng Gao faster in water treatment, gas adsorption application aspect.
Accompanying drawing explanation
Fig. 1 is the X-ray diffraction spectrogram of porous boron nitride nanofiber in embodiment 1.
Fig. 2 is the scanning electron microscope diagram of porous boron nitride nanofiber in embodiment 1.
Fig. 3 is the transmission electron microscope figure of porous boron nitride nanofiber in embodiment 1.
Fig. 4 is the high resolution transmission electron microscopy figure of porous boron nitride nanofiber in embodiment 1.
Fig. 5 is the low temperature nitrogen adsorption and desorption thermoisopleth of porous boron nitride nanofiber in embodiment 1.
Embodiment
Below in conjunction with accompanying drawing and specific examples, the present invention is further described.
The spraying plant used in the embodiment of the present invention and freeze drier are known device.
Embodiment 1
(1) by trimeric cyanamide and boric acid water-soluble, the mixing solutions of obtained trimeric cyanamide-boric acid-water, its concentration is that every ml water contains 0.012 gram of trimeric cyanamide and 0.018 gram of boric acid, then stir 2 hours, add the reactor with reflux, preheating 85 DEG C makes it dissolve and is incubated 5 hours; Subsequently solution is cooled to 25 DEG C with the lower the temperature speed of 1 DEG C of per minute, adularescent throw out is separated out, and keeps this temperature to place 8 hours, filters and obtains solid sediment;
(2) throw out obtained in step (1) is put into 95 DEG C of drying bakers, be incubated 8 hours, obtain white solid;
(3) be added to the water by the white solid obtained in step (2), wherein, every ml water adds 0.006 gram of white solid, and then preheating 85 DEG C makes it dissolve and is incubated 2 hours;
(4) added in spraying kettle by the solution of preparation in step (3), be equipped with in the container of liquid nitrogen through being sprayed to, solution quick freeze obtains white solid; Subsequently the container filling white solid is put into that freeze drier is freezing to be drained (temperature-50 DEG C, 20Pa), keep freezing and drain 72 hours, obtain White Flocculus.
(5) solid will obtained in step (4), 1200 DEG C of thermal treatments in argon gas atmosphere, temperature rise rate is per minute 10 DEG C, and soaking time is 4 hours, and gas flow rate is 100 milliliters/per minute, Temperature fall in argon gas atmosphere.Obtaining product is porous hexagonal boron nitride fiber.
Through XRD test, it is staggered floor boron nitride that the diffraction peak of Fig. 1 shows product, and does not have the diffraction peak of other dephasigns to occur, illustrates that the purity through the porous boron nitride nanofiber prepared by the inventive method is high.Find out that porous boron nitride nanofiber has one dimension wire pattern through SEM figure (Fig. 2), length is about 10-30 micron, purity about 95%, and illustrate that product morphology is homogeneous, purity is high, and output is large; TEM figure (Fig. 3) shows porous boron nitride nanofiber diameter and is about 20-50 nanometer, and length-to-diameter ratio is up to 200-1500, and do not have impurity particle to be present in nanofiber, purity is high; High resolution TEM schemes (Fig. 4) and shows that boron nitride nanometer fiber is vesicular structure; By surveying BET (Fig. 5), the specific surface area that can calculate nitride porous boron fibre is 279.679m 2/ g, the boron nitride nanometer fiber prepared by explanation has high specific surface area.What above collection of illustrative plates illustrated that the present invention obtains is that pattern is homogeneous, pure phase, cavernous boron nitride nanometer filamentary material.
Embodiment 2, example 3
Change the concentration of step (1) trimeric cyanamide in embodiment 1 into every ml water respectively and contain 0.005 gram, 0.05 gram trimeric cyanamide, other operations is all identical with embodiment 1, and the product obtained is with embodiment 1.
Embodiment 4, example 5
Change the concentration of step (1) boric acid in embodiment 1 into every ml water respectively and contain 0.005 gram, 0.5 gram boric acid, other operations is all identical with embodiment 1, and the product obtained is with embodiment 1.
Embodiment 6
Change the concentration that white solid in step (3) in embodiment 1 is added to the water into every ml water and contain 0.02 gram of white solid, other operations is all identical with embodiment 1, obtain porous boron nitride nanofiber, sem analysis shows that the diameter of obtained boron nitride nanometer fiber is about 50-100 nanometer, and length is about 10-30 micron.
Embodiment 7, example 8
Change the thermal treatment temp of step (5) in embodiment 1 into 1100 DEG C, 1300 DEG C respectively, other operations is all identical with embodiment 1, and the product obtained is with embodiment 1.
Embodiment 9,10
Change step (5) protective atmosphere in embodiment 1 into nitrogen, other operations is all identical with embodiment 1, and the product obtained is with embodiment 1.
Unaccomplished matter of the present invention is known technology.

Claims (3)

1. a preparation method for porous boron nitride nanofiber, is characterized by and comprise the steps:
(1) by trimeric cyanamide and boric acid water-soluble, the mixing solutions of obtained trimeric cyanamide-boric acid-water, its concentration is that every ml water contains 0.005-0.05 gram of trimeric cyanamide and 0.005-0.5 gram of boric acid, stir the reactor added after 1-3 hour with reflux, preheating 80-95 DEG C makes it dissolve and is incubated 2-15 hour; Subsequently solution is cooled to 15-30 DEG C, speed of cooling is per minute 1-50 DEG C, has throw out to separate out, and is incubated 5-10 hour, filters and obtains solid sediment;
(2) throw out obtained in step (1) is put into 75-95 DEG C of drying baker, insulation 3-8 hour, obtains white solid;
(3) be added to the water by the white solid obtained in step (2), its concentration is that every ml water adds 0.005-0.01 gram of white solid, and preheating 70-90 DEG C makes it dissolve and is incubated 2-4 hour;
(4) add in spraying plant by the solution of preparation in step (3), be equipped with in the container of liquid nitrogen through being sprayed to, solution quick freeze obtains white solid; In freeze drier, vacuum freezing is drained subsequently, and the hold-time is 48-72 hour, obtains White Flocculus;
(5) White Flocculus will obtained in step (4); 900-1500 DEG C of thermal treatment under protective atmosphere, temperature rise rate is per minute 1-20 DEG C, and soaking time is 2-6 hour; at protective atmosphere borehole cooling, obtain white solid matter and be porous boron nitride nanofiber.
2. the preparation method of porous boron nitride nanofiber as claimed in claim 1, it is characterized by the protective atmosphere described in step (5) is argon gas or nitrogen.
3. the preparation method of porous boron nitride nanofiber as claimed in claim 1, the gas flow rate that it is characterized by the protective atmosphere in step (5) is 50-500 milliliter/per minute.
CN201510026727.1A 2015-01-20 2015-01-20 A kind of preparation method of porous boron nitride nanofiber Active CN104528671B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510026727.1A CN104528671B (en) 2015-01-20 2015-01-20 A kind of preparation method of porous boron nitride nanofiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510026727.1A CN104528671B (en) 2015-01-20 2015-01-20 A kind of preparation method of porous boron nitride nanofiber

Publications (2)

Publication Number Publication Date
CN104528671A true CN104528671A (en) 2015-04-22
CN104528671B CN104528671B (en) 2016-08-17

Family

ID=52844367

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510026727.1A Active CN104528671B (en) 2015-01-20 2015-01-20 A kind of preparation method of porous boron nitride nanofiber

Country Status (1)

Country Link
CN (1) CN104528671B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105565397A (en) * 2016-01-29 2016-05-11 卓达新材料科技集团有限公司 Preparation method of germanium oxide and rhodium oxide hybrid aerogel composite material
CN106116617A (en) * 2016-06-20 2016-11-16 华南理工大学 A kind of ultra-fine boron nitride porous fibre toughness reinforcing WC composite and preparation method thereof
CN106495109A (en) * 2016-11-02 2017-03-15 河北工业大学 A kind of cystose boron nitride block materials preparation method
CN107793174A (en) * 2017-11-14 2018-03-13 中国人民解放军国防科技大学 Preparation method of boron nitride fiber three-dimensional structure material and product thereof
CN108408698A (en) * 2018-04-27 2018-08-17 南方科技大学 Oxygen doping is bundled shape porous boron nitride preparation method
CN109647369A (en) * 2019-01-15 2019-04-19 浙江师范大学 Porous carbon nanocatalyst, preparation method and applications
CN110075899A (en) * 2019-04-30 2019-08-02 河北工业大学 A kind of preparation method for the bimetallic catalyst that porous boron nitride is nano-fibre supported
CN110629323A (en) * 2019-10-14 2019-12-31 河北工业大学 Method for synthesizing porous boron nitride fiber with high length-diameter ratio under assistance of organic solvent
CN110683573A (en) * 2019-11-18 2020-01-14 河北工业大学 Method for preparing indium oxide nanotube by using porous BN nano fiber as template
CN111533093A (en) * 2020-05-29 2020-08-14 哈尔滨工业大学 Preparation method of blocky boron nitride aerogel based on combination of freeze drying method and tubular furnace high-temperature heating method
WO2020168838A1 (en) * 2019-02-22 2020-08-27 中国科学院苏州纳米技术与纳米仿生研究所 Flexible boron nitride nano-belt aerogel and preparation method therefor
CN111762763A (en) * 2020-06-29 2020-10-13 中国科学院金属研究所 Method for realizing microstructure regulation and control of boron nitride aerogel by inducing supramolecular morphology transformation through solvent
CN112342017A (en) * 2020-11-06 2021-02-09 山东大学 Ultra-long-life room temperature phosphorescent material and preparation method and application thereof
CN112877810A (en) * 2021-02-01 2021-06-01 山东大学 Preparation method of porous boron nitride fiber with high specific surface area
CN112938911A (en) * 2021-03-24 2021-06-11 云南华谱量子材料有限公司 Preparation method of boron nitride nanosheet
CN114560717A (en) * 2022-04-06 2022-05-31 中国科学院赣江创新研究院 Preparation method and application of one-dimensional porous boron nitride fiber material
CN115138328A (en) * 2022-08-02 2022-10-04 江苏大学 Aluminum-doped boron nitride nanofiber monoatomic adsorbent and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101428813A (en) * 2008-12-17 2009-05-13 哈尔滨工业大学深圳研究生院 Process for producing ultra-fine boron nitride continuous nano-fibre
CN102126709A (en) * 2010-01-20 2011-07-20 中国科学院金属研究所 Preparation method of boron nitride one-dimensional nanostructure macroscopic rope
CN102936138A (en) * 2012-11-22 2013-02-20 河北工业大学 Synthesis method of porous hexagonal boron nitride fiber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101428813A (en) * 2008-12-17 2009-05-13 哈尔滨工业大学深圳研究生院 Process for producing ultra-fine boron nitride continuous nano-fibre
CN102126709A (en) * 2010-01-20 2011-07-20 中国科学院金属研究所 Preparation method of boron nitride one-dimensional nanostructure macroscopic rope
CN102936138A (en) * 2012-11-22 2013-02-20 河北工业大学 Synthesis method of porous hexagonal boron nitride fiber

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
XINMEI HOU ET AL.: "Facile synthesis of hexagonal boron nitride fibers with uniform morphology", 《CERAMICS INTERNATIONAL》 *
倪星元等: "《纳米材料制备技术》", 31 January 2008 *

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105565397A (en) * 2016-01-29 2016-05-11 卓达新材料科技集团有限公司 Preparation method of germanium oxide and rhodium oxide hybrid aerogel composite material
CN106116617A (en) * 2016-06-20 2016-11-16 华南理工大学 A kind of ultra-fine boron nitride porous fibre toughness reinforcing WC composite and preparation method thereof
CN106116617B (en) * 2016-06-20 2019-05-14 华南理工大学 A kind of ultra-fine boron nitride porous fibre toughening WC composite material and preparation method
CN106495109A (en) * 2016-11-02 2017-03-15 河北工业大学 A kind of cystose boron nitride block materials preparation method
CN106495109B (en) * 2016-11-02 2018-07-31 河北工业大学 A kind of foam-like boron nitride block materials preparation method
CN107793174B (en) * 2017-11-14 2019-10-29 中国人民解放军国防科技大学 Preparation method of boron nitride fiber three-dimensional structure material and product thereof
CN107793174A (en) * 2017-11-14 2018-03-13 中国人民解放军国防科技大学 Preparation method of boron nitride fiber three-dimensional structure material and product thereof
CN108408698A (en) * 2018-04-27 2018-08-17 南方科技大学 Oxygen doping is bundled shape porous boron nitride preparation method
CN108408698B (en) * 2018-04-27 2021-10-01 南方科技大学 Preparation method of oxygen-doped bundled porous boron nitride
CN109647369A (en) * 2019-01-15 2019-04-19 浙江师范大学 Porous carbon nanocatalyst, preparation method and applications
CN109647369B (en) * 2019-01-15 2022-03-25 浙江师范大学 Porous carbon nano-catalyst, preparation method and application thereof
WO2020168838A1 (en) * 2019-02-22 2020-08-27 中国科学院苏州纳米技术与纳米仿生研究所 Flexible boron nitride nano-belt aerogel and preparation method therefor
JP7197221B2 (en) 2019-02-22 2022-12-27 中国科学院蘇州納米技術与納米▲ファン▼生研究所 Boron nitride nanobelt airgel and its production method
JP2021535885A (en) * 2019-02-22 2021-12-23 中国科学院蘇州納米技術与納米▲ファン▼生研究所 Flexible Boron Nitride Nanobelt Airgel and Its Manufacturing Method
CN110075899A (en) * 2019-04-30 2019-08-02 河北工业大学 A kind of preparation method for the bimetallic catalyst that porous boron nitride is nano-fibre supported
CN110629323B (en) * 2019-10-14 2021-11-16 河北工业大学 Method for synthesizing porous boron nitride fiber with high length-diameter ratio under assistance of organic solvent
CN110629323A (en) * 2019-10-14 2019-12-31 河北工业大学 Method for synthesizing porous boron nitride fiber with high length-diameter ratio under assistance of organic solvent
CN110683573A (en) * 2019-11-18 2020-01-14 河北工业大学 Method for preparing indium oxide nanotube by using porous BN nano fiber as template
CN111533093A (en) * 2020-05-29 2020-08-14 哈尔滨工业大学 Preparation method of blocky boron nitride aerogel based on combination of freeze drying method and tubular furnace high-temperature heating method
CN111762763A (en) * 2020-06-29 2020-10-13 中国科学院金属研究所 Method for realizing microstructure regulation and control of boron nitride aerogel by inducing supramolecular morphology transformation through solvent
CN111762763B (en) * 2020-06-29 2022-10-11 中国科学院金属研究所 Method for realizing microstructure regulation and control of boron nitride aerogel by inducing supramolecular morphology transformation through solvent
CN112342017A (en) * 2020-11-06 2021-02-09 山东大学 Ultra-long-life room temperature phosphorescent material and preparation method and application thereof
CN112877810A (en) * 2021-02-01 2021-06-01 山东大学 Preparation method of porous boron nitride fiber with high specific surface area
CN112938911A (en) * 2021-03-24 2021-06-11 云南华谱量子材料有限公司 Preparation method of boron nitride nanosheet
CN114560717A (en) * 2022-04-06 2022-05-31 中国科学院赣江创新研究院 Preparation method and application of one-dimensional porous boron nitride fiber material
CN115138328A (en) * 2022-08-02 2022-10-04 江苏大学 Aluminum-doped boron nitride nanofiber monoatomic adsorbent and preparation method and application thereof

Also Published As

Publication number Publication date
CN104528671B (en) 2016-08-17

Similar Documents

Publication Publication Date Title
CN104528671A (en) Preparation method of porous boron nitride nanofibers
CN102936138B (en) Synthesis method of porous hexagonal boron nitride fiber
CN105692573B (en) A kind of preparation method of nanostructure nitridation carbon
CN103922295B (en) A kind of preparation method of boron nitride nano-tube
CN110002414B (en) Preparation method of porous carbon nitride nanotube
Ma et al. A new route to synthesis of γ-alumina nanorods
Shi et al. Obtaining ultra-long copper nanowires via a hydrothermal process
CN108483413B (en) Preparation method of bamboo-shaped boron nitride nanotube hierarchical structure with ultrathin boron nitride nanosheets loaded on surface
CN106276882B (en) Preparation method of graphitized porous carbon with cyclic utilization of transition metal elements
Li et al. Preparation of photoluminescent single crystalline MgO nanobelts by DC arc plasma jet CVD
CN108408698B (en) Preparation method of oxygen-doped bundled porous boron nitride
Ying et al. Simple synthesis of semi-graphitized ordered mesoporous carbons with tunable pore sizes
US20230073650A1 (en) Carbon nanotube (cnt)-based three-dimensional ordered macroporous (3dom) material and preparation method thereof
Xu et al. High-temperature stable electrospun MgO nanofibers, formation mechanism and thermal properties
CN101891184A (en) Method for continuously synthesizing single-wall carbon nano tube by high temperature chemical vapor deposition method
Li et al. Controllable hydrothermal synthesis and properties of ZnO hierarchical micro/nanostructures
CN108046327B (en) Preparation method of tungsten disulfide nanotube
CN100560487C (en) A kind of method of low-temperature preparation of cubic silicon carbide nano wire
CN106268928B (en) A kind of ordered big hole-is mesoporous-synthetic method of micropore multistage pore catalyst
Liu et al. Highly efficient synthesis of hexagonal boron nitride nanofibers with high specific surface area
Li et al. Synthesis of β-SiC nanostructures via the carbothermal reduction of resorcinol–formaldehyde/SiO 2 hybrid aerogels
CN101550591B (en) Monodisperse C70 nano unit crystal material and method for preparing same
CN104071760A (en) Preparation method of porous rod-like hexagonal boron nitride ceramic material
Wang et al. Growth mechanism and ultraviolet-visible property of novel thick-walled boron nitride nanostructures
CN110629323B (en) Method for synthesizing porous boron nitride fiber with high length-diameter ratio under assistance of organic solvent

Legal Events

Date Code Title Description
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant