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树枝状纤维纳米二氧化硅/金杂化纳米材料的合成与应用

Synthesis and Application of Dendritic Fibrous Nanosilica/Gold Hybrid Nanomaterials.

作者信息

Byoun Wongyun, Jung Soeun, Tran Ngoc Minh, Yoo Hyojong

机构信息

Department of Chemistry Hallym University Chuncheon, Gangwon-do 24252 Republic of Korea.

出版信息

ChemistryOpen. 2018 May 16;7(5):349-355. doi: 10.1002/open.201800040. eCollection 2018 May.

DOI:10.1002/open.201800040
PMID:29872610
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5974554/
Abstract

Morphologically unique silica nanoparticles can be used as effective templates to prepare silica-metal hybrid nanomaterials, which are highly applicable in a variety of areas. Mesoporous silica nanoparticles, which have high surface areas and an abundance of pores, can be used to synthesize mesoporous silica core-metal shell nanostructures with catalytically active sites. In this work, dendritic fibrous nanosilica (DFNS) with a high surface area is successfully employed as a template to synthesize DFNS/Au hybrid nanomaterials. Au nanodots are initially synthesized through the selective reduction of Au ions on the surface of the DFNS after surface modification to form DFNS/Au dots. A seed-mediated growth method is used to controllably grow Au nanoparticles on the DFNS/Au dots to generate DFNS core-Au nanoparticles shell nanohybrids (DFNS/Au NPs) and DFNS core-Au layer shell nanohybrids (DFNS/Au layers). The catalytic activities of DFNS/Au NPs and DFNS/Au layers in the 4-nitrophenol reduction reaction are compared.

摘要

形态独特的二氧化硅纳米颗粒可作为有效的模板来制备二氧化硅-金属杂化纳米材料，这些材料在多个领域具有高度适用性。具有高表面积和丰富孔隙的介孔二氧化硅纳米颗粒可用于合成具有催化活性位点的介孔二氧化硅核-金属壳纳米结构。在这项工作中，具有高表面积的树枝状纤维纳米二氧化硅（DFNS）成功地用作模板来合成DFNS/Au杂化纳米材料。通过在表面改性后选择性还原DFNS表面的金离子，最初合成金纳米点以形成DFNS/Au点。采用种子介导生长法在DFNS/Au点上可控地生长金纳米颗粒，以生成DFNS核-金纳米颗粒壳纳米杂化物（DFNS/Au NPs）和DFNS核-金层壳纳米杂化物（DFNS/Au层）。比较了DFNS/Au NPs和DFNS/Au层在4-硝基苯酚还原反应中的催化活性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/514b95dd712d/OPEN-7-349-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/c4dd1f119793/OPEN-7-349-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/2f9dbb288951/OPEN-7-349-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/49fe9e0e8f57/OPEN-7-349-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/ca486ef5bfa2/OPEN-7-349-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/90b5318ce9bf/OPEN-7-349-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/514b95dd712d/OPEN-7-349-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/c4dd1f119793/OPEN-7-349-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/2f9dbb288951/OPEN-7-349-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/49fe9e0e8f57/OPEN-7-349-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/ca486ef5bfa2/OPEN-7-349-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/90b5318ce9bf/OPEN-7-349-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ca14/5974554/514b95dd712d/OPEN-7-349-g006.jpg

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