CAS OpenIR  > 多相复杂系统国家重点实验室
Mesoporous titanosilicate nanoparticles: facile preparation and application in heterogeneous epoxidation of cyclohexene
Jiang, Yanqiu1; Zhao, Yong1; Xu, Xianzhu1; Lin, Kaifeng1; Wang, Dan2
2016
发表期刊RSC ADVANCES
ISSN2046-2069
卷号6期号:81页码:77481-77488
摘要

Mesoporous titanosilicate nanoparticles with a size of 40 to 75 nm (Nano-Ti-MCM-41) were hydrothermally synthesized from a titanosilicate (TiSil) solution with cetyltrimethylammonium bromide (CTAB) as the template and with a cationic polymer as the size-controlling agent. The particle size is proposed to be controlled by adjusting the size of TiSil-CTA(+) micelles influenced by the charge interaction between negatively charged titanosilicate and polymer cationic ions during the formation of TiSil-CTA+ micelles. The presence of n-hexane and hydrogen peroxide in the preparation process proved to favor a well-ordered mesostructure in these nanoparticles: the mesostructure became disordered without using hexane and hydrogen peroxide although the size of mesoporous titanosilicate particles remained in the nanometer scale. The characterization results showed that Nano-Ti-MCM-41 possesses hierarchical porosity (bimodal mesopores) and an ordered mesoporous structure and that the titanium species are predominately located in tetrahedral framework positions. Nano-Ti-MCM-41 is a highly active catalyst for the epoxidation of cyclohexene with hydrogen peroxide, and displayed higher turnover numbers (TONs) based on the cyclohexene conversions and higher selectivity ratio between cyclohexene epoxide and 1,2-cyclohexanediol compared with traditional Ti-MCM-41 prepared without the cationic polymer. The improved catalytic performances are mainly ascribed to the decrease in the particle size of Ti-MCM-41, resulting in the enhanced accessibility of the reactants to the catalytic Ti species via the shorter channels of Nano-Ti-MCM-41 and in the shorter residence time of cyclohexene epoxide in the mesopores of the nanoparticles. Importantly, the mesoporous titanosilicate nanoparticles are stable catalysts immune to titanium leaching, suggesting their good recyclability potential in the epoxidation with aqueous H2O2.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c6ra10145c
收录类别SCI
语种英语
关键词[WOS]MOLECULAR-SIEVES ; HOLLOW SPHERES ; SILICA NANOPARTICLES ; CONTROLLED MORPHOLOGIES ; MESOSTRUCTURED SILICA ; HIERARCHICAL ORDER ; CATALYTIC-ACTIVITY ; CATIONIC POLYMER ; TI-MCM-41 ; MCM-41
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National Natural Science Foundation of China(51472062 ; Fundamental Research Funds for the Central Universities(HIT. IBRSEM. 201326) ; Program for Science and Technology Innovation Talent in Harbin(2013RFQXJ004) ; 21303031)
WOS记录号WOS:000382482200040
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21474
专题多相复杂系统国家重点实验室
作者单位1.Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150080, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Jiang, Yanqiu,Zhao, Yong,Xu, Xianzhu,et al. Mesoporous titanosilicate nanoparticles: facile preparation and application in heterogeneous epoxidation of cyclohexene[J]. RSC ADVANCES,2016,6(81):77481-77488.
APA Jiang, Yanqiu,Zhao, Yong,Xu, Xianzhu,Lin, Kaifeng,&Wang, Dan.(2016).Mesoporous titanosilicate nanoparticles: facile preparation and application in heterogeneous epoxidation of cyclohexene.RSC ADVANCES,6(81),77481-77488.
MLA Jiang, Yanqiu,et al."Mesoporous titanosilicate nanoparticles: facile preparation and application in heterogeneous epoxidation of cyclohexene".RSC ADVANCES 6.81(2016):77481-77488.
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
Mesoporous titanosil(860KB)期刊论文出版稿开放获取CC BY-NC-SA浏览 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
[Jiang, Yanqiu]的文章
[Zhao, Yong]的文章
[Xu, Xianzhu]的文章
百度学术
百度学术中相似的文章
[Jiang, Yanqiu]的文章
[Zhao, Yong]的文章
[Xu, Xianzhu]的文章
必应学术
必应学术中相似的文章
[Jiang, Yanqiu]的文章
[Zhao, Yong]的文章
[Xu, Xianzhu]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Mesoporous titanosilicate nanoparticles- facile preparation and application in heterogeneous epoxidation of cyclohexene.pdf
格式: Adobe PDF
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。