自下而上法制备金-介孔二氧化硅复合纳米管用作还原4-硝基苯酚的催化剂
采用自下而上方法制备了金-介孔二氧化硅复合纳米管,其中金纳米粒子作为催化剂嵌在介孔二氧化硅纳米管管壁内侧.金纳米颗粒的团聚、脱落和晶粒尺寸生长都可以被有效限制,而且催化剂负载量和尺寸大小均可实现简单控制.管壁中的介孔孔道、纳米管末端开口以及一维中空管道可以协同促进反应物扩散,从而提高4-硝基苯酚还原反应活性.循环实验证明这种复合纳米管催化剂具有良好的可重复使用性,而且在反应过程中未出现金纳米粒子脱落或团聚现象....
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| Published in | 催化学报 Vol. 36; no. 7; pp. 1117 - 1123 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国科学院大连化学物理研究所，辽宁大连116023%中国科学院大连化学物理研究所,辽宁大连,116023%齐鲁工业大学化学与制药工程学院,山东济南,250353
2015
齐鲁工业大学化学与制药工程学院，山东济南250353 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-9837 1872-2067 |
| DOI | 10.1016/S1872-2067(14)60310-7 |
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| Summary: | 采用自下而上方法制备了金-介孔二氧化硅复合纳米管,其中金纳米粒子作为催化剂嵌在介孔二氧化硅纳米管管壁内侧.金纳米颗粒的团聚、脱落和晶粒尺寸生长都可以被有效限制,而且催化剂负载量和尺寸大小均可实现简单控制.管壁中的介孔孔道、纳米管末端开口以及一维中空管道可以协同促进反应物扩散,从而提高4-硝基苯酚还原反应活性.循环实验证明这种复合纳米管催化剂具有良好的可重复使用性,而且在反应过程中未出现金纳米粒子脱落或团聚现象. |
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| Bibliography: | Gold Mesoporous silica Nanotube Bottom-up approach Catalyst 4-Nitrophenol reduction Yongsheng Peng Wenguang Leng, Bin Dong , Rile Ge, Hongdong Duan , Yan＇an Gao（1. School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology,Jinan 250353, Shandong, China b Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China） Gold（Au） nanoparticle（NP）-mesoporous silica（SiO 2） composite nanotubes were prepared by a bottom-up approach, in which Au NPs were anchored to the inner wall of mesoporous SiO 2 tubular shells. In this composite, the agglomeration, exfoliation, and grain growth of Au NPs were restricted, and the loading and size of the catalyst NPs were easily tuned. The mesoporous shell, open ends, and one-dimensional passage of the SiO 2 nanotubes all promote the diffusion of reactants, which enhanced the catalytic efficiency of this composite in the reduction of 4-nitrophenol. The Au NP-mesoporous SiO 2 composite nanotubes also demonstrated good reusabili |
| ISSN: | 0253-9837 1872-2067 |
| DOI: | 10.1016/S1872-2067(14)60310-7 |