Noble metal/functionalized cellulose nanofiber composites for catalytic applications

被引：86

作者：

Gopiraman, Mayakrishnan ^{[1
]}

Bang, Hyunsik ^{[1
]}

Yuan, Guohao ^{[1
]}

Yin, Chuan ^{[1
]}

Song, Kyung-Hun ^{[2
]}

Lee, Jung Soon ^{[3
]}

Chung, Ill Min ^{[4
]}

Karvembu, Ramasamy ^{[5
]}

Kim, Ick Soo ^{[1
]}

机构：

[1] Shinshu Univ, Natl Univ Corp, ICCER, Nano Fus Technol Res Lab,Div Frontier Fibers,Inst, Ueda, Nagano 3868567, Japan

[2] PaiChai Univ, Dept Clothing & Text, Taejon 302735, South Korea

[3] Chungnam Natl Univ, Dept Clothing & Text, Taejon 305764, South Korea

[4] Konkuk Univ, Dept Appl Biosci, Coll Life & Environm, Seoul 143701, South Korea

[5] Natl Inst Technol, Dept Chem, Tiruchirappalli 620015, Tamil Nadu, India

来源：

CARBOHYDRATE POLYMERS | 2015年 / 132卷

关键词：

Electrospinning; Cellulose nanocomposites; Noble metals; Surface modification; Heterogeneous catalysis; Reusability; RUTHENIUM NANOPARTICLES; AEROBIC OXIDATION; ALCOHOLS; EFFICIENT; GRAPHENE; SOLVENT; AMINES;

D O I：

10.1016/j.carbpol.2015.06.051

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 +/- 2.0 nm were electro-spun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNEs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on thef-CNEs 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-CNEs. 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. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：554 / 564

页数：11

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