Noble metal/functionalized cellulose nanofiber composites for catalytic applications

Mayakrishnan Gopiraman; Hyunsik Bang; Guohao Yuan; Chuan Yin; Kyung Hun Song; Jung Soon Lee; Ill Min Chung; Ramasamy Karvembu; Ick Soo Kim

doi:10.1016/j.carbpol.2015.06.051

Noble metal/functionalized cellulose nanofiber composites for catalytic applications

Mayakrishnan Gopiraman, Hyunsik Bang, Guohao Yuan, Chuan Yin, Kyung Hun Song, Jung Soon Lee, Ill Min Chung, Ramasamy Karvembu, Ick Soo Kim

Research output: Contribution to journal › Article › peer-review

78 Citations (Scopus)

Abstract

Abstract In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 ± 2.0 nm were electrospun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNFs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on the f-CNFs by a simple wet reduction method using NaBH₄ as a reducing agent. TEM and SEM images of the nanocomposites (RuNPs/CNFs and AgNPs/CNFs) confirmed that the very fine RuNPs or AgNPs were homogeneously dispersed on the surface of f-CNFs. The weight percentage of the Ru and Ag in the nanocomposites was found to be 13.29 wt% and 22.60 wt% respectively; as confirmed by SEM-EDS analysis. The metallic state of the Ru and Ag in the nanocomposites was confirmed by XPS and XRD analyses. The usefulness of these nanocomposites was realized from their superior catalytic activity. In the aerobic oxidation of benzyl alcohol to benzaldehyde, the RuNPs/CNFs system gave a better yield of 89% with 100% selectivity. Similarly, the AgNPs/CNFs produced an excellent yield of 99% (100% selectivity) in the aza-Michael reaction of 1-phenylpiperazine with acrylonitrile. Mechanism has been proposed for the catalytic systems.

Original language	English
Article number	10042
Pages (from-to)	554-564
Number of pages	11
Journal	Carbohydrate Polymers
Volume	132
DOIs	https://doi.org/10.1016/j.carbpol.2015.06.051
Publication status	Published - 2015 Jul 18
Externally published	Yes

Keywords

Cellulose nanocomposites
Electrospinning
Heterogeneous catalysis
Noble metals
Reusability
Surface modification

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.carbpol.2015.06.051

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@article{1d77678ed1084a68afde96bb25f06d8a,

title = "Noble metal/functionalized cellulose nanofiber composites for catalytic applications",

abstract = "Abstract In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 ± 2.0 nm were electrospun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNFs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on the f-CNFs by a simple wet reduction method using NaBH4 as a reducing agent. TEM and SEM images of the nanocomposites (RuNPs/CNFs and AgNPs/CNFs) confirmed that the very fine RuNPs or AgNPs were homogeneously dispersed on the surface of f-CNFs. The weight percentage of the Ru and Ag in the nanocomposites was found to be 13.29 wt% and 22.60 wt% respectively; as confirmed by SEM-EDS analysis. The metallic state of the Ru and Ag in the nanocomposites was confirmed by XPS and XRD analyses. The usefulness of these nanocomposites was realized from their superior catalytic activity. In the aerobic oxidation of benzyl alcohol to benzaldehyde, the RuNPs/CNFs system gave a better yield of 89% with 100% selectivity. Similarly, the AgNPs/CNFs produced an excellent yield of 99% (100% selectivity) in the aza-Michael reaction of 1-phenylpiperazine with acrylonitrile. Mechanism has been proposed for the catalytic systems.",

keywords = "Cellulose nanocomposites, Electrospinning, Heterogeneous catalysis, Noble metals, Reusability, Surface modification",

author = "Mayakrishnan Gopiraman and Hyunsik Bang and Guohao Yuan and Chuan Yin and Song, {Kyung Hun} and Lee, {Jung Soon} and Chung, {Ill Min} and Ramasamy Karvembu and Kim, {Ick Soo}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = jul,

day = "18",

doi = "10.1016/j.carbpol.2015.06.051",

language = "English",

volume = "132",

pages = "554--564",

journal = "Carbohydrate Polymers",

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TY - JOUR

T1 - Noble metal/functionalized cellulose nanofiber composites for catalytic applications

AU - Gopiraman, Mayakrishnan

AU - Bang, Hyunsik

AU - Yuan, Guohao

AU - Yin, Chuan

AU - Song, Kyung Hun

AU - Lee, Jung Soon

AU - Chung, Ill Min

AU - Karvembu, Ramasamy

AU - Kim, Ick Soo

PY - 2015/7/18

Y1 - 2015/7/18

N2 - Abstract In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 ± 2.0 nm were electrospun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNFs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on the f-CNFs by a simple wet reduction method using NaBH4 as a reducing agent. TEM and SEM images of the nanocomposites (RuNPs/CNFs and AgNPs/CNFs) confirmed that the very fine RuNPs or AgNPs were homogeneously dispersed on the surface of f-CNFs. The weight percentage of the Ru and Ag in the nanocomposites was found to be 13.29 wt% and 22.60 wt% respectively; as confirmed by SEM-EDS analysis. The metallic state of the Ru and Ag in the nanocomposites was confirmed by XPS and XRD analyses. The usefulness of these nanocomposites was realized from their superior catalytic activity. In the aerobic oxidation of benzyl alcohol to benzaldehyde, the RuNPs/CNFs system gave a better yield of 89% with 100% selectivity. Similarly, the AgNPs/CNFs produced an excellent yield of 99% (100% selectivity) in the aza-Michael reaction of 1-phenylpiperazine with acrylonitrile. Mechanism has been proposed for the catalytic systems.

AB - Abstract In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 ± 2.0 nm were electrospun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNFs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on the f-CNFs by a simple wet reduction method using NaBH4 as a reducing agent. TEM and SEM images of the nanocomposites (RuNPs/CNFs and AgNPs/CNFs) confirmed that the very fine RuNPs or AgNPs were homogeneously dispersed on the surface of f-CNFs. The weight percentage of the Ru and Ag in the nanocomposites was found to be 13.29 wt% and 22.60 wt% respectively; as confirmed by SEM-EDS analysis. The metallic state of the Ru and Ag in the nanocomposites was confirmed by XPS and XRD analyses. The usefulness of these nanocomposites was realized from their superior catalytic activity. In the aerobic oxidation of benzyl alcohol to benzaldehyde, the RuNPs/CNFs system gave a better yield of 89% with 100% selectivity. Similarly, the AgNPs/CNFs produced an excellent yield of 99% (100% selectivity) in the aza-Michael reaction of 1-phenylpiperazine with acrylonitrile. Mechanism has been proposed for the catalytic systems.

KW - Cellulose nanocomposites

KW - Electrospinning

KW - Heterogeneous catalysis

KW - Noble metals

KW - Reusability

KW - Surface modification

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M3 - Article

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AN - SCOPUS:84937239499

SN - 0144-8617

VL - 132

SP - 554

EP - 564

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

M1 - 10042

ER -

Noble metal/functionalized cellulose nanofiber composites for catalytic applications

Abstract

Keywords

ASJC Scopus subject areas

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