兰州大学机构库 >化学化工学院
Fibrous nano-silica containing immobilized Ni@Au core-shell nanoparticles: A highly active and reusable catalyst for the reduction of 4-nitrophenol and 2-nitroaniline
Le, XD; Dong, ZP(董正平); Zhang, W; Li, XL; Ma, JT(马建泰); Dong, ZP (reprint author), Lanzhou Univ, Coll Chem & Chem Engn, Gansu Prov Engn Lab Chem Catalysis, Lanzhou 730000, Peoples R China.
2014-12
发表期刊JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
ISSN1381-1169
卷号395页码:58-65
出版者ELSEVIER
摘要A novel, dandelion-like fibrous nano-silica catalyst (Ni@Au/KCC-1) has been synthesized by modifying fibrous nano-silica (KCC-1) with Ni@Au core-shell nanoparticles (NPs). KCC-1 was prepared using a hydrothermal method and has a dandelion-like shape, high surface area, and easy accessibility; KCC-1 can also be functionalized with 3-mercaptopropyltriethoxysilane. The mercaptopropyl groups on the fibers act as robust anchors for the immobilization of Ni@Au NPs, thus preventing the aggregation of the Ni@Au NPs. We investigated the catalytic performance of the Ni@Au/KCC-1 nanocatalyst by reducing 4-nitrophenol to 4-aminophenol in the presence of NaBH4 as a probe reaction. The resulting Ni@Au/KCC1 nanocatalyst exhibited superior catalytic activity to Ni@Au NPs, which may be attributed to the high accessibility of the KCC-1 support material. To some extent, it also may be due to the poor aggregation of Ni@Au NPs on the KCC-1 nano-silica support. The Ni@Au/KCC-1 nanocatalyst also showed high catalytic activity when used to reduce 2-nitroaniline. It is noteworthy that using Ni cores to fabricate the active sites Ni@Au NPs resulted in a lower amount of Au needed than is typical, because most of the Au-NPs catalyzed reactions occur on the surfaces of the NPs. In addition, the Ni cores give the Ni@Au/KCC-1 nanocatalyst superparamagnetic properties that increase its ease of recovery by a powerful magnet, allowing for it to be reused. The abovementioned approach based on fibrous KCC-1 and Ni@Au NPs provided a useful platform for the fabrication of noble-metal-based nanocatalysts with easy accessibility and a low cost, which may allow for an efficient green alternative for various catalytic reductions. (C) 2014 Elsevier B.V. All rights reserved.
出版地AMSTERDAM
关键词Fibrous nano-silica Ni@Au core-shell nanoparticles Reduction 4-Nitrophenol 2-Nitroaniline
学科领域Chemistry
作者部门[Le, Xuanduong;
Dong, Zhengping;
Zhang, Wei;
Li, Xinlin;
Ma, Jiantai] Lanzhou Univ, Coll Chem & Chem Engn, Gansu Prov Engn Lab Chem Catalysis, Lanzhou 730000, Peoples R China
DOI10.1016/j.molcata.2014.08.002
文章类型Article
收录类别SCIE ; EI
所属项目编号NSFC [21301082] ; Natural Science Foundation of Gansu [1308RJYA028] ; Fundamental Research Funds for the Central Universities [lzujbky-2013-61]
语种英语
资助项目国家自然科学基金项目 ; 中央高校基本科研业务费专项资金 ; 甘肃省青年科技基金计划
项目资助者NSFC ; LZU ; GSSTD
WOS记录号WOS:000347498500008
EI记录号20144100088250
第一机构
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文献类型期刊论文
条目标识符http://ir.lzu.edu.cn/handle/262010/126403
Collection化学化工学院
通讯作者Dong, ZP (reprint author), Lanzhou Univ, Coll Chem & Chem Engn, Gansu Prov Engn Lab Chem Catalysis, Lanzhou 730000, Peoples R China.
Recommended Citation:
GB/T 7714
Le, XD,Dong, ZP,Zhang, W,et al. Fibrous nano-silica containing immobilized Ni@Au core-shell nanoparticles: A highly active and reusable catalyst for the reduction of 4-nitrophenol and 2-nitroaniline[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2014,395:58-65.
APA Le, XD,Dong, ZP,Zhang, W,Li, XL,Ma, JT,&Dong, ZP .(2014).Fibrous nano-silica containing immobilized Ni@Au core-shell nanoparticles: A highly active and reusable catalyst for the reduction of 4-nitrophenol and 2-nitroaniline.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,395,58-65.
MLA Le, XD,et al."Fibrous nano-silica containing immobilized Ni@Au core-shell nanoparticles: A highly active and reusable catalyst for the reduction of 4-nitrophenol and 2-nitroaniline".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 395(2014):58-65.
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