Noble metal/functionalized cellulose nanofiber composites for catalytic applications

Gopiraman, Mayakrishnan; Bang, Hyunsik; Yuan, Guohao; Yin, Cong; Song, Kyung Hun; Lee, Jung-soon; Chung, Ill Min; Karvembu, Ramasamy; Kim, Ick Soo

doi:10.1016/j.carbpol.2015.06.051

Cited by 93 publications

(33 citation statements)

References 55 publications

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“…The high‐resolution X‐ray photoelectron spectrum (XPS) of P 1s (1.8 wt %) and Ru 3p (2.9 wt %) further indicated the successful functionalization of phosphorus and the growth of RuNCs on carbon supports (see the XPS survey spectrum in Figure S3). Two asymmetric high‐resolution Ru 3p XPS peaks appeared at 461.9 and 484.3 eV, both of which are slightly higher than the reported value of Ru nanoparticles onto carbon nanofibers . N 2 sorption isotherms showed the Ru@P‐C has a Brunauer–Emmett–Teller (BET) surface area of 29 cm 2 g −1 , close to that of the un‐treated activated carbon …”

Section: Figurementioning

confidence: 81%

Ultrafine and Ligand‐Free Precious Metal (Ru, Ag, Au, Rh and Pd) Nanoclusters Supported on Phosphorus‐Doped Carbon

Liu

Zhong

et al. 2018

Chemistry A European J

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We report the use of phosphorus-doped carbon (P-C) as support to grow ultrasmall (1-3 nm) and ligand-free precious metal nanocrystals (PMNCs) via chemical reduction. We show that the valence states of surface phosphorus species are critical in tuning the affinity between the carbon support and metal precursors, which rationally controls the loading size and uniformity of resultant PMNCs. Five kinds of PMNCs, including Ru, Ag, Au, Rh, and Pd, were grown in situ to demonstrate the key role of surface phosphorus sites on the P-C support. As a proof-of-concept application, Ru nanocatalysts with an average diameter of 1.0±0.2 nm supported on P-C were examined for the electrocatalytic hydrogen evolution reaction (HER). Ultrasmall and ligand-free Ru nanocatalysts exhibited superior HER activity and stability compared to its counterparts with surface agents or larger sizes. An overpotential of 27.6 mV (vs. reversible hydrogen electrode) for Ru nanocatalysts was achieved at a current density of 10 mA cm . This novel method opens a new avenue to immobilize ligand-free and well-dispersed PMNCs on carbon; and, more importantly, it provides a new library of supported PMNCs with high catalytic activity.

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Section: Figurementioning

confidence: 81%

Ultrafine and Ligand‐Free Precious Metal (Ru, Ag, Au, Rh and Pd) Nanoclusters Supported on Phosphorus‐Doped Carbon

Liu

Zhong

et al. 2018

Chemistry A European J

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“…But the first step and the final step happen on the components of the electrospinning system, which can be exploited to improve the effective usage of electrical energy and thus to reduce the cost of final products for commercial applications. The first step, that is, the charge of working fluid, was realized through putting a metal line in the fluid originally [19], but later in almost all the publications, the working fluids were charged through a direct connection of the power supply with the metal spinneret (and often an alligator clip was utilized) for this objective [20][21][22][23].…”

Section: Efficacious Application Of Electrical Energy Via a Polymer-cmentioning

confidence: 99%

Effective Utilization of the Electrostatic Repulsion for Improved Alignment of Electrospun Nanofibers

Shi

et al. 2016

Journal of Nanomaterials

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Uniaxial alignment of electrospun fibers can provide a useful approach to develop novel functional nanomaterials for applications in a wide variety of fields. In this study, a polypropylene- (PP-) coated spinneret and a metal spinneret were utilized to carry out the single-fluid electrospinning processes. A metal rod frame was utilized as the collector to steer the nanofibers. Using polyvinylpyrrolidone K90 (PVP K90) as a filament-forming polymeric model at a concentration of 9% (w/v) in ethanol, the experimental observations and results demonstrated the following results: (1) the utilization efficiency of electrical energy could be improved through the PP-coated spinneret; (2) the texture of collector had a significant influence on the collection of aligned PVP K90 nanofibers; and (3) the combination of a PP-coated spinneret with the metal frame could ensure the electrostatic repulsion forces to play their roles effectively in generating PVP K90 nanofibers with thinner diameters and in collecting uniaxial alignment of them. The mechanisms about the orientation effects of the present method are discussed. This job opens a facile way for producing aligned polymeric nanofibers based on the reasonable manipulation of the interactions between the electrostatic field and the working fluids.

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“…With enhanced surface area and pore volume, the nanofibers as a filtering media deliver high contact between adsorbent and aqueous media, resulting in improved adsorption capacity with the convenience of recovery and recycling. By engineering various functional groups (carboxylate, amino, acid, and hydroxyl groups) or the integration of adsorbents, including metal oxides, graphene, graphene oxide (GO), and metal-organic frameworks (MOFs) in the nanofibers, the separation capacity can be greatly improved [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Composite Nanofibers: Recent Progress in Adsorptive Removal and Photocatalytic Degradation of Dyes

Phan¹,

Kim²

2020

Composite and Nanocomposite Materials - From Knowledge to Industrial Applications

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This chapter intends to review the state of the art of a new nanomaterial generation based on electrospun composite nanofibers for dye removal from wastewater. Natural polymer-based nanofibers, nanofibers with unique morphology, and carbon nanofibers were comprehensively reviewed as capable carriers for a broad spectrum of functional materials such as metal oxides, zeolite, graphene and graphene oxide (GO), and metal-organic frameworks (MOFs) in the application of dye removal. The various nanostructures, adsorption capacity, advantages, and drawbacks were discussed along with mechanistic actions in the adsorption process and photocatalytic performance that emphasize current research development, opportunities, and challenges. The chapter covers multiple intriguing topics with in-depth discussion and is a valuable reference for researchers who are working on nanomaterials and the treatment of colored waters.

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Noble metal/functionalized cellulose nanofiber composites for catalytic applications

Cited by 93 publications

References 55 publications

Ultrafine and Ligand‐Free Precious Metal (Ru, Ag, Au, Rh and Pd) Nanoclusters Supported on Phosphorus‐Doped Carbon

Ultrafine and Ligand‐Free Precious Metal (Ru, Ag, Au, Rh and Pd) Nanoclusters Supported on Phosphorus‐Doped Carbon

Effective Utilization of the Electrostatic Repulsion for Improved Alignment of Electrospun Nanofibers

Composite Nanofibers: Recent Progress in Adsorptive Removal and Photocatalytic Degradation of Dyes

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