DICP OpenIR
Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting; Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting
Yang, QH; Wang, SL; Lu, JQ; Xiong, G; Feng, ZC; Xin, Q; Li, C
关键词Chemical Grafting Chemical Grafting Titanium-silica Titanium-silica Epoxidation Epoxidation Uv Resonance Raman Uv Resonance Raman Visible Raman Visible Raman Styrene Styrene
刊名APPLIED CATALYSIS A-GENERAL ; APPLIED CATALYSIS A-GENERAL
2000-03-13 ; 2000-03-13
194期:195页:507-514
收录类别SCI ; SCI
文章类型Article ; Article
部门归属5 ; 5
项目归属503 ; 503
WOS标题词Science & Technology ; Science & Technology ; Physical Sciences ; Physical Sciences ; Life Sciences & Biomedicine ; Life Sciences & Biomedicine
类目[WOS]Chemistry, Physical ; Chemistry, Physical ; Environmental Sciences ; Environmental Sciences
研究领域[WOS]Chemistry ; Chemistry ; Environmental Sciences & Ecology ; Environmental Sciences & Ecology
关键词[WOS]SILICA MIXED OXIDES ; SILICA MIXED OXIDES ; TITANIUM TETRACHLORIDE ; TITANIUM TETRACHLORIDE ; SURFACES ; SURFACES ; HYDROPEROXIDES ; HYDROPEROXIDES ; CYCLOHEXENE ; CYCLOHEXENE ; OLEFINS ; OLEFINS ; TICL4 ; TICL4 ; BETA ; BETA
英文摘要Titania-silica (Ti/SiO2) and silica-titania-silica (Si/Ti/SiO2) catalysts were:prepared by chemical grafting using TiCl4 and tetraethyl orthosilicate (TEOS) as precursors and SiO2 as support. The prepared catalysts were characterized by UV Raman and visible Raman spectroscopies, XRD and the epoxidation of styrene; Ti/SiO2: catalyst grafted with only titanium species is not very active for epoxidation using H2O2 (30%), but is active and-selective when one uses tert-butyl hydroperoxide (TBHP). The catalyst grafted at high temperatures shows better epoxide selectivity. Si/Ti/SiO2 catalyst, the titanium-silica grafted further with TEOS, is active and selective for the epoxidation of styrene using either dilute H2O2 or TBHP, possibly due to the fact that the grafting of Ti/SiO2 with TEOS modifies the coordination structure of titanium and makes the titanium sites of Si-O-Ti-O-Si species less hydrophilic. A characteristic band at 1085cm(-1) due to Ti-O-Si species is detected for the grafted catalysts by UV resonance Raman spectroscopy. Reaction between TiCl4 and SiO2 at high temperatures favors the formation of Ti-O-Si species. Better activity and selectivity to epoxide,is found for the catalysts with more Ti-O-Si species. It is assumed that the active sites are the highly isolated Ti-O-Si species. For Si/Ti/SiO2 catalyst, the gas phase O-2 can participate in the catalytic oxidation of styrene when H2O2 is present ana:ii causes the formation of benzaldehyde. (C) 2000 Elsevier Science B.V. All rights reserved.; Titania-silica (Ti/SiO2) and silica-titania-silica (Si/Ti/SiO2) catalysts were:prepared by chemical grafting using TiCl4 and tetraethyl orthosilicate (TEOS) as precursors and SiO2 as support. The prepared catalysts were characterized by UV Raman and visible Raman spectroscopies, XRD and the epoxidation of styrene; Ti/SiO2: catalyst grafted with only titanium species is not very active for epoxidation using H2O2 (30%), but is active and-selective when one uses tert-butyl hydroperoxide (TBHP). The catalyst grafted at high temperatures shows better epoxide selectivity. Si/Ti/SiO2 catalyst, the titanium-silica grafted further with TEOS, is active and selective for the epoxidation of styrene using either dilute H2O2 or TBHP, possibly due to the fact that the grafting of Ti/SiO2 with TEOS modifies the coordination structure of titanium and makes the titanium sites of Si-O-Ti-O-Si species less hydrophilic. A characteristic band at 1085cm(-1) due to Ti-O-Si species is detected for the grafted catalysts by UV resonance Raman spectroscopy. Reaction between TiCl4 and SiO2 at high temperatures favors the formation of Ti-O-Si species. Better activity and selectivity to epoxide,is found for the catalysts with more Ti-O-Si species. It is assumed that the active sites are the highly isolated Ti-O-Si species. For Si/Ti/SiO2 catalyst, the gas phase O-2 can participate in the catalytic oxidation of styrene when H2O2 is present ana:ii causes the formation of benzaldehyde. (C) 2000 Elsevier Science B.V. All rights reserved.
语种英语 ; 英语
原文出处查看原文 ; 查看原文
WOS记录号WOS:000085733200052 ; WOS:000085733200052
引用统计
被引频次:76[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/91427
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Yang, QH,Wang, SL,Lu, JQ,et al. Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting, Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting[J]. APPLIED CATALYSIS A-GENERAL, APPLIED CATALYSIS A-GENERAL,2000, 2000,194, 194(195):507-514, 507-514.
APA Yang, QH.,Wang, SL.,Lu, JQ.,Xiong, G.,Feng, ZC.,...&Li, C.(2000).Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting.APPLIED CATALYSIS A-GENERAL,194(195),507-514.
MLA Yang, QH,et al."Epoxidation of styrene on Si/Ti/SiO2 catalysts prepared by chemical grafting".APPLIED CATALYSIS A-GENERAL 194.195(2000):507-514.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
2000TC6KYON0T6.pdf(267KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Yang, QH]的文章
[Wang, SL]的文章
[Lu, JQ]的文章
百度学术
百度学术中相似的文章
[Yang, QH]的文章
[Wang, SL]的文章
[Lu, JQ]的文章
必应学术
必应学术中相似的文章
[Yang, QH]的文章
[Wang, SL]的文章
[Lu, JQ]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。