Mesoporous silica-based nanotubes loaded Pd nanoparticles: Effect of framework compositions on the performance in heterogeneous catalysis
Mesoporous silica-based nanotubes loaded Pd nanoparticles: Effect of framework compositions on the performance in heterogeneous catalysis
复制标题
介孔二氧化硅基纳米管负载钯纳米粒子：骨架成分对多相催化性能的影响
DOI：
10.1016/j.micromeso.2017.03.040
复制
发表时间：
2017-07
影响因子：
5.2
通讯作者：
Han Jinyu
中科院分区：
文献类型：
--
作者：
Sun Jing;Wang Hua;Gao Xue;Zhu Xinli;Ge Qingfeng;Liu Xiao;Han Jinyu
具有不同骨架组成的良好形状的介孔二氧化硅基纳米管，如有机基团（乙烯，亚苯基），碳/二氧化硅杂化物，可以可控地合成内径小于10 nm，表面积约为400-900 m2 g-1。通过电子显微镜分析证实，钯（Pd）纳米粒子通过一个吸附-还原过程均匀地分散在这些不同的纳米管的通道中。以苯甲醇的有氧氧化反应和α，β-不饱和羧酸的不对称选择性加氢反应为催化剂，考察了负载Pd纳米粒子的硅基纳米管的催化性能。由于一维纳米管结构和可调的亲水/疏水性质，有机硅纳米管负载的Pd纳米粒子在2 h内可提供>99%的苯甲醇转化率和89%的苯甲醛选择性。重要的是，碳/二氧化硅混合纳米管可能对反应具有积极影响，其给出约95%的苯甲醛选择性。该催化剂可重复使用，且转化率和选择性均无明显下降。此外，纳米管负载的Pd催化剂对α，β-不饱和羧酸的不对称加氢反应也有很好的催化效果，转化率高达99%，对映选择性为48%。
Well-shaped mesoporous silica-based nanotubes with different framework compositions, such as organic groups (ethylene, phenylene), carbon/silica hybrids, could be controllably synthesized with the inner diameter of less than 10 nm and the surface areas of about 400–900 m2g−1. Through an impregnation-reduction process, palladium (Pd) nanoparticles have been uniformly dispersed in the channels of these different nanotubes, which were confirmed by electron microscopy analysis. The catalytic performance of these silica-based nanotubes loaded Pd nanoparticles was evaluated by the aerobic oxidation of benzyl alcohol and enantioselective hydrogenation of α,β-unsaturated carboxylic acid, respectively. Due to one-dimensional nanotube structures and tunable hydrophilic/hydrophobic properties, the organosilica nanotubes supported Pd nanoparticles could afford >99% conversion of benzyl alcohol and 89% selectivity of benzaldehyde within 2 h. Importantly, carbon/silica hybrid nanotubes may have a positive effect on the reaction, which gave about 95% selectivity of benzaldehyde. The catalysts could be reused without an obvious decrease in both conversion and selectivity. Furthermore, the silica-based nanotubes supported Pd nanoparticles were also efficient for asymmetric hydrogenation of α,β-unsaturated carboxylic acids, which showed a highest conversion of 99% with 48% enantioselectivity.
登录
查看更多内容
用于酯化和酯交换反应的高效且可回收的有机磺酸官能化烷基桥有机硅纳米管的制备
DOI：
10.1016/j.apcatb.2014.07.047
发表时间：
2015-02
期刊：
Applied Catalysis B: Environmental
影响因子：
--
作者：
D. Y. Song;S. An;B. Lu;Y. H. Guo
通讯作者：
Y. H. Guo
影响因子：
4.5
作者：
Savara, Aditya;Chan-Thaw, Carine E.;Prati, Laura
通讯作者：
Prati, Laura
通过同时金属合金化和蚀刻合成铂纳米管和纳米环
影响因子：
15
作者：
Huang, Zhiqi;Raciti, David;Nie, Zhihong
通讯作者：
Nie, Zhihong
二氧化硅纳米管及其硼酸辅助组装成分级介观结构
影响因子：
3.9
作者：
Ding, Shilei;Liu, Na;Ding, Weiping
通讯作者：
Ding, Weiping
影响因子：
46.2
作者：
Qi Wang;Xiangke Wang;Z. Chai;Wenping Hu
通讯作者：
Qi Wang;Xiangke Wang;Z. Chai;Wenping Hu