CN104495918A - Method for preparing granular titanium dioxide/two-dimensional nano-titanium carbide composite material - Google Patents
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Cited By (33)
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CN104762660A (en) * | 2015-04-13 | 2015-07-08 | 中国科学院宁波材料技术与工程研究所 | Carbide crystal material with two-dimensional lamellar structure and preparation method thereof |
CN105363483A (en) * | 2015-12-09 | 2016-03-02 | 陕西科技大学 | Preparation method of titanium dioxide nanowire/two-dimensional layered titanium carbide composite material |
CN105470486A (en) * | 2015-12-25 | 2016-04-06 | 陕西科技大学 | Preparation method of granular tin dioxide/two-dimensional nano titanium carbide composite material |
CN105895385A (en) * | 2016-05-31 | 2016-08-24 | 陕西科技大学 | Titanium oxide columnar array/two-dimensional lamellar titanium carbide electrode material and preparation and application thereof |
CN106098394A (en) * | 2016-05-31 | 2016-11-09 | 西安交通大学 | Two-dimensional layer N doping Ti3c2" paper " nano composite material and preparation method thereof and the method preparing combination electrode with this material |
CN106882841A (en) * | 2017-03-03 | 2017-06-23 | 陕西科技大学 | A kind of titanium dioxide nano thread/two-dimensional layer carbonization titanium composite material and its low temperature preparation method |
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CN108499588A (en) * | 2018-03-02 | 2018-09-07 | 东华大学 | A kind of g-C3N4The preparation method of/MXene composite materials |
CN108615614A (en) * | 2018-05-25 | 2018-10-02 | 重庆大学 | A kind of N doping TiO2/ MXene composite material and preparation methods and application |
CN108641780A (en) * | 2018-04-25 | 2018-10-12 | 青岛大学 | A kind of nano combined er material preparation method of titanium dioxide nano thread modification MXene |
CN109095449A (en) * | 2018-08-24 | 2018-12-28 | 华南理工大学 | A kind of carbon aerogels and its preparation and application in the sensor with superelevation linear sensitivity |
CN109192940A (en) * | 2018-08-13 | 2019-01-11 | 中南大学 | A kind of poly modified Mxene composite material and preparation method of titanium dioxide/graphene |
CN109417863A (en) * | 2016-04-22 | 2019-03-01 | 德雷塞尔大学 | Two-dimensional metallic carbide, nitride and carbon nitride films and compound for EMI shielding |
CN109675549A (en) * | 2019-01-08 | 2019-04-26 | 中盐金坛盐化有限责任公司 | A kind of stratiform MXene doping prepares the method for catalyst and the application in gas purification |
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CN110942921A (en) * | 2019-11-26 | 2020-03-31 | 北京科技大学 | Preparation method of novel three-dimensional composite aerogel electrode material |
CN111232981A (en) * | 2020-01-17 | 2020-06-05 | 北京理工大学 | High lithium storage capacity Ti3C2TxMechanochemical preparation method of |
CN111514913A (en) * | 2020-04-23 | 2020-08-11 | 厦门理工学院 | Preparation method of composite photocatalyst, product and application thereof |
CN111574958A (en) * | 2020-05-19 | 2020-08-25 | 东华大学 | Carbide MXene/SiO of core-edge structure2Nano-plate-shaped ultrathin microwave absorbing material |
CN111715251A (en) * | 2020-07-08 | 2020-09-29 | 信阳师范学院 | Exposing active {001} crystal plane TiO2Preparation method and application of TiC MXene composite photocatalyst |
CN111841592A (en) * | 2020-08-17 | 2020-10-30 | 盐城工学院 | In-situ derivatization synthesis of TiO by using Ti-based MOF2-Ti3C2Tx composite photocatalyst and application thereof |
CN112246263A (en) * | 2020-09-21 | 2021-01-22 | 华南理工大学 | Non-metal surface plasma catalyst and preparation method and application thereof |
CN112982032A (en) * | 2021-02-18 | 2021-06-18 | 陕西科技大学 | Preparation method of wallpaper composite material for indoor formaldehyde purification |
CN113526506A (en) * | 2020-04-17 | 2021-10-22 | 北京化工大学 | Method for preparing TiO by adopting etching-ball milling method2/Ti3C2Method for compounding nano material |
CN114160089A (en) * | 2021-11-05 | 2022-03-11 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | VOCs adsorbing material of titanium tricarboxide composite titanium dioxide and preparation method thereof |
CN114789048A (en) * | 2022-04-28 | 2022-07-26 | 安徽工程大学 | Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application thereof in photocatalytic hydrogen production |
CN115092929A (en) * | 2022-06-30 | 2022-09-23 | 陕西师范大学 | Preparation method of large-sheet-layer controllable-pore MXene nanosheets |
US11554961B2 (en) * | 2017-12-22 | 2023-01-17 | Drexel University | Crumpled mesoporous MXene powders synthesized by acid-, base-, or salt-induced crumpling |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102569761A (en) * | 2010-12-08 | 2012-07-11 | 中国科学院金属研究所 | Titanium dioxide/graphene nanocomposite material and preparation method and application thereof |
CN103641119A (en) * | 2013-12-03 | 2014-03-19 | 江苏大学 | Preparation method of material similar to graphene |
CN104016345A (en) * | 2014-06-03 | 2014-09-03 | 河海大学 | Method for preparing graphene-like two-dimensional laminar titanium carbide nanoplate |
-
2014
- 2014-12-23 CN CN201410812056.7A patent/CN104495918B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102569761A (en) * | 2010-12-08 | 2012-07-11 | 中国科学院金属研究所 | Titanium dioxide/graphene nanocomposite material and preparation method and application thereof |
CN103641119A (en) * | 2013-12-03 | 2014-03-19 | 江苏大学 | Preparation method of material similar to graphene |
CN104016345A (en) * | 2014-06-03 | 2014-09-03 | 河海大学 | Method for preparing graphene-like two-dimensional laminar titanium carbide nanoplate |
Non-Patent Citations (2)
Title |
---|
H. GHASSEMI ET AL.: ""In situ environmental transmission electron microscopy study of oxidation of two-dimensional Ti3C2 and formation of carbon-supported TiO2"", 《J. MATER. CHEM. A.》, vol. 2, 8 July 2014 (2014-07-08), pages 14339 - 14343 * |
WEI LI ET AL.: ""Sol−Gel Design Strategy for Ultradispersed TiO2 Nanoparticles on Graphene for High-Performance Lithium Ion Batteries"", 《J. AM. CHEM. SOC.》, vol. 135, 19 November 2013 (2013-11-19), pages 18300 - 18303 * |
Cited By (50)
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CN104762660A (en) * | 2015-04-13 | 2015-07-08 | 中国科学院宁波材料技术与工程研究所 | Carbide crystal material with two-dimensional lamellar structure and preparation method thereof |
CN105363483A (en) * | 2015-12-09 | 2016-03-02 | 陕西科技大学 | Preparation method of titanium dioxide nanowire/two-dimensional layered titanium carbide composite material |
CN105470486B (en) * | 2015-12-25 | 2018-03-06 | 陕西科技大学 | The preparation method of graininess tin ash/two-dimensional nano carbonization titanium composite material |
CN105470486A (en) * | 2015-12-25 | 2016-04-06 | 陕西科技大学 | Preparation method of granular tin dioxide/two-dimensional nano titanium carbide composite material |
CN109417863A (en) * | 2016-04-22 | 2019-03-01 | 德雷塞尔大学 | Two-dimensional metallic carbide, nitride and carbon nitride films and compound for EMI shielding |
CN105895385B (en) * | 2016-05-31 | 2018-05-08 | 陕西科技大学 | A kind of titanium oxide columnar arrays/two-dimensional layer titanium carbide electrode material and its preparation and application |
CN105895385A (en) * | 2016-05-31 | 2016-08-24 | 陕西科技大学 | Titanium oxide columnar array/two-dimensional lamellar titanium carbide electrode material and preparation and application thereof |
CN106098394A (en) * | 2016-05-31 | 2016-11-09 | 西安交通大学 | Two-dimensional layer N doping Ti3c2" paper " nano composite material and preparation method thereof and the method preparing combination electrode with this material |
CN106098394B (en) * | 2016-05-31 | 2018-05-18 | 西安交通大学 | Two-dimensional layer N doping Ti3C2" paper " nanocomposite and preparation method thereof and the method with the material preparation combination electrode |
CN106882841A (en) * | 2017-03-03 | 2017-06-23 | 陕西科技大学 | A kind of titanium dioxide nano thread/two-dimensional layer carbonization titanium composite material and its low temperature preparation method |
CN106915767A (en) * | 2017-03-03 | 2017-07-04 | 陕西科技大学 | A kind of holey Magneli phases Asia titania meterial and its low temperature preparation method |
CN107955167A (en) * | 2017-12-07 | 2018-04-24 | 黑龙江科技大学 | A kind of preparation method of high-performance polyimide titanium carbide nanosheet composite material |
CN107955167B (en) * | 2017-12-07 | 2020-08-18 | 陕西科技大学 | Preparation method of high-performance polyimide titanium carbide nanosheet composite material |
US11866339B2 (en) * | 2017-12-22 | 2024-01-09 | Drexel University | Anodes crumpled MXene compositions, composites, and devices |
US11554961B2 (en) * | 2017-12-22 | 2023-01-17 | Drexel University | Crumpled mesoporous MXene powders synthesized by acid-, base-, or salt-induced crumpling |
CN108499588A (en) * | 2018-03-02 | 2018-09-07 | 东华大学 | A kind of g-C3N4The preparation method of/MXene composite materials |
CN108641780B (en) * | 2018-04-25 | 2020-12-15 | 青岛大学 | Preparation method of titanium dioxide nanowire modified MXene nano-composite electrorheological material |
CN108641780A (en) * | 2018-04-25 | 2018-10-12 | 青岛大学 | A kind of nano combined er material preparation method of titanium dioxide nano thread modification MXene |
CN108615614A (en) * | 2018-05-25 | 2018-10-02 | 重庆大学 | A kind of N doping TiO2/ MXene composite material and preparation methods and application |
CN109192940A (en) * | 2018-08-13 | 2019-01-11 | 中南大学 | A kind of poly modified Mxene composite material and preparation method of titanium dioxide/graphene |
CN109192940B (en) * | 2018-08-13 | 2021-07-30 | 中南大学 | Titanium dioxide/graphene multi-element modified Mxene composite material and preparation method thereof |
CN109095449B (en) * | 2018-08-24 | 2021-11-19 | 华南理工大学 | Carbon aerogel with ultrahigh linear sensitivity, preparation thereof and application thereof in sensor |
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CN109675549A (en) * | 2019-01-08 | 2019-04-26 | 中盐金坛盐化有限责任公司 | A kind of stratiform MXene doping prepares the method for catalyst and the application in gas purification |
CN110002493A (en) * | 2019-03-28 | 2019-07-12 | 盐城工学院 | A kind of two dimension Ti3C2/TiO2-xThe preparation method of nanocomposite |
CN110002493B (en) * | 2019-03-28 | 2021-04-23 | 盐城工学院 | Two-dimensional Ti3C2/TiO2-xProcess for preparing nano composite material |
CN110639569A (en) * | 2019-06-16 | 2020-01-03 | 浙江工业大学 | Unsaturated coordination-rich two-dimensional ceramic material catalyst and preparation method and application thereof |
CN110368968A (en) * | 2019-07-15 | 2019-10-25 | 中国石油大学(北京) | NiFe-LDH/Ti3C2/Bi2WO6Nano-chip arrays and preparation method and application |
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CN110642341A (en) * | 2019-10-22 | 2020-01-03 | 河海大学 | Membrane electrode for ozone/electric filtration coupling water treatment system and preparation method and application thereof |
CN110942921A (en) * | 2019-11-26 | 2020-03-31 | 北京科技大学 | Preparation method of novel three-dimensional composite aerogel electrode material |
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CN111232981A (en) * | 2020-01-17 | 2020-06-05 | 北京理工大学 | High lithium storage capacity Ti3C2TxMechanochemical preparation method of |
CN111232981B (en) * | 2020-01-17 | 2020-12-29 | 北京理工大学 | High lithium storage capacity Ti3C2TxMechanochemical preparation method of |
CN113526506A (en) * | 2020-04-17 | 2021-10-22 | 北京化工大学 | Method for preparing TiO by adopting etching-ball milling method2/Ti3C2Method for compounding nano material |
CN111514913A (en) * | 2020-04-23 | 2020-08-11 | 厦门理工学院 | Preparation method of composite photocatalyst, product and application thereof |
CN111574958B (en) * | 2020-05-19 | 2023-03-21 | 东华大学 | Carbide MXene/SiO of core-edge structure 2 Nano-plate-shaped ultrathin microwave absorbing material |
CN111574958A (en) * | 2020-05-19 | 2020-08-25 | 东华大学 | Carbide MXene/SiO of core-edge structure2Nano-plate-shaped ultrathin microwave absorbing material |
CN111715251A (en) * | 2020-07-08 | 2020-09-29 | 信阳师范学院 | Exposing active {001} crystal plane TiO2Preparation method and application of TiC MXene composite photocatalyst |
CN111841592A (en) * | 2020-08-17 | 2020-10-30 | 盐城工学院 | In-situ derivatization synthesis of TiO by using Ti-based MOF2-Ti3C2Tx composite photocatalyst and application thereof |
CN111841592B (en) * | 2020-08-17 | 2023-01-06 | 盐城工学院 | In-situ derivatization synthesis of TiO by using Ti-based MOF 2 -Ti 3 C 2 Tx composite photocatalyst and application thereof |
CN112246263A (en) * | 2020-09-21 | 2021-01-22 | 华南理工大学 | Non-metal surface plasma catalyst and preparation method and application thereof |
CN112982032A (en) * | 2021-02-18 | 2021-06-18 | 陕西科技大学 | Preparation method of wallpaper composite material for indoor formaldehyde purification |
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CN114160089A (en) * | 2021-11-05 | 2022-03-11 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | VOCs adsorbing material of titanium tricarboxide composite titanium dioxide and preparation method thereof |
CN114160089B (en) * | 2021-11-05 | 2024-04-05 | 上海船舶工艺研究所(中国船舶集团有限公司第十一研究所) | VOCs adsorption material of titanium carbide composite titanium dioxide and preparation method thereof |
CN114789048A (en) * | 2022-04-28 | 2022-07-26 | 安徽工程大学 | Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application thereof in photocatalytic hydrogen production |
CN114789048B (en) * | 2022-04-28 | 2023-08-15 | 安徽工程大学 | Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application thereof in photocatalytic hydrogen production |
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CN115092929A (en) * | 2022-06-30 | 2022-09-23 | 陕西师范大学 | Preparation method of large-sheet-layer controllable-pore MXene nanosheets |
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