Development of novel solid acid catalyst based on polyanion nanosheets
基于聚阴离子纳米片的新型固体酸催化剂的研制
基本信息
- 批准号:15360427
- 负责人:
- 金额:$ 9.54万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2005
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Two-dimensional metal oxide sheets in cation-exchangeable layered metal oxides such as HTiNbO_5 and HNb_3O_8 were examined as solid-acid catalysts. Exfoliation of HTiNbO_5 and HNb_3O_8 in aqueous solutions formed colloidal single-crystal TiNbO_5 and Nb_3O_8 nanosheets, precipitating under an acidic condition to form aggregates of the nanosheets. Although esterification of acetic acid, cracking of cumene and dehydration of 2-propanol were not catalyzed by original layered metal oxides because of the narrow interlayer distance, which prevents the insertion of organic molecules, the nanosheet aggregates functioned as strong solid acid catalysts for the reactions. NH_3 temperature-programmed desorption and ^1H magic-angle spinning nuclear magnetic resonance spectroscopy revealed that these nanosheet aggregates have strong Bronsted acid sites due to Nb^<5+> (or Ti^<4+>)-(OH)-Nb^<5+>.We also found that amorphous carbon composed of small graphen sheets with high density of sulfonic acid groups function as a replacement for sulfuric acid catalyst. The material prepared from inexpensive starting materials has high thermal and chemical stability.
将二维金属氧化物片(例如Htinbo_5和HNB_3O_8)中的阳离子分层金属氧化物中的二维金属氧化物片检查为固体酸催化剂。在水溶液中的Htinbo_5和HNB_3O_8的去角质形成胶体单晶Tinbo_5和NB_3O_8纳米片,在酸性条件下沉淀以形成纳米片的聚集体。尽管乙酸的酯化,液体的裂解和2-丙醇的脱水并没有被原始分层金属氧化物催化,因为较窄的层间距离,这阻止了有机分子的插入,但纳米果聚集体插入了强固体酸催化剂的反应。 NH_3 temperature-programmed desorption and ^1H magic-angle spinning nuclear magnetic resonance spectroscopy revealed that these nanosheet aggregates have strong Bronsted acid sites due to Nb^<5+> (or Ti^<4+>)-(OH)-Nb^<5+>.We also found that amorphous carbon composed of small graphen sheets with high density of sulfonic acid groups function as a replacement for硫酸催化剂。用廉价的起始材料制备的材料具有较高的热和化学稳定性。
项目成果
期刊论文数量(24)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
A.Takagaki, M.Sugisawa, J.N.Kondo, M.Hara, K.Domen, S.Hayashi: "Exfoliated Nanosheets as a New Strong Solid Acid Catalyst"Journal of the American Chemical Society. 104(4). 780-785 (2003)
A.Takagaki、M.Sugisawa、J.N.Kondo、M.Hara、K.Domen、S.Hayashi:“剥离纳米片作为新型强固体酸催化剂”美国化学会杂志。
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- 影响因子:0
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A carbon material as a strong protonic acid
- DOI:10.1002/anie.200453947
- 发表时间:2004-01-01
- 期刊:
- 影响因子:16.6
- 作者:Hara, M;Yoshida, T;Domen, K
- 通讯作者:Domen, K
M.Hara, et al.: "To_3N_5 and TaON Thin Films on TaFoil"Journal of Physical Chemistry B. 107(48). 13441-13445 (2003)
M.Hara 等人:“TaFoil 上的 To_3N_5 和 TaON 薄膜”物理化学杂志 B. 107(48)。
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- 影响因子:0
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A.Ishikawa, A.Yamada, T.Takata, J.N.Kondo, M.Hara, H.Kobayashi, K.Domen: "Novel Synthesis and Photocatalytic activity of Oxysulfide"Chemistry of Materials. 15(23). 4442-4446 (2003)
A.Ishikawa、A.Yamada、T.Takata、J.N.Kondo、M.Hara、H.Kobayashi、K.Domen:“硫氧化物的新颖合成和光催化活性”材料化学。
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- 影响因子:0
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無機ナノシートの科学と応用 ナノシートの固体酸触媒への応用(黒田一幸,佐々木高義監修)
无机纳米片的科学与应用纳米片在固体酸催化剂中的应用(黑田和之和佐佐木贵佳指导)
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:高垣敦;原亨和;林繁信;堂免一成
- 通讯作者:堂免一成
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HARA Michikazu其他文献
HARA Michikazu的其他文献
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{{ truncateString('HARA Michikazu', 18)}}的其他基金
Synthesis of highly active and multi-functional carbon-based solid acid
高活性多功能碳基固体酸的合成
- 批准号:
18206081 - 财政年份:2006
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (A)