Surface functionalized silica as a toolkit for studying aqueous phase palladium adsorption and mineralization on thiol moiety in the absence of external reducing agents

Lim, Jung Sun; Kim, Seung Min; Lee, Sang Yup; Stach, Eric A.; Culver, James N.; Harris, Michael T.

doi:10.1016/j.jcis.2010.12.064

Cited by 17 publications

(12 citation statements)

References 35 publications

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“…[29] Smaller particle sizes, however,o ffer inherenta dvantages of larger surface area per unit mass of preciousP dm etal. Inspired by Lim et al's study on Pd coating of TMV templates in the absence of external reducer, [41] we recently examined spontaneous formationo fPd nanoparticles under elevatedt emperature and observed consistentf ormation of small (1-2 nm), uniform and highly crystalline Pd nanoparticles along TMV1cys. [42] We then enlistedasimple and robust replica molding technique to encapsulate the Pd-TMV complexes in as table and shape-encoded PEG-based polymericmicroparticle format (Figure 9).…”

Section: Integration Of Tmv-templated Small Pd Nanocatalysts With Polmentioning

confidence: 85%

Viral templated palladium nanocatalysts for dichromate reduction

Yang

Manocchi

Lee

et al. 2010

Applied Catalysis B: Environmental

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Section: Integration Of Tmv-templated Small Pd Nanocatalysts With Polmentioning

confidence: 85%

Viral templated palladium nanocatalysts for dichromate reduction

Yang

Manocchi

Lee

et al. 2010

Applied Catalysis B: Environmental

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“…Several studies have investigated palladium ions adsorption using e.g. thiol-functionalized silica (Lim et al 2011;Qishu et al 2012), modified chitin or chitosan (Fujiwara et al 2007;Wasikiewicz et al 2007) and functionalized polymers or resins (Awual et al 2013;JermakowiczBartkowiak et al 2005;Venkatesan et al 2005). Among the adsorbents, some are not environmentally benign and rely on a petrol feedstock, whereas others are green, e.g.…”

Section: Introductionmentioning

confidence: 99%

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

2016

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A green and efficient adsorbent for adsorption of palladium ions was prepared from 2,3-dialdehyde cellulose (DAC) originating from nanocellulose from the green algae Cladophora. The DAC was functionalized with cysteine via reductive amination in a convenient one-pot procedure to provide the adsorbent. The adsorption properties for adsorbing palladium(II) ions, including capacity, adsorption isotherm and kinetics, were studied. The successful reductive amination of cysteine with 2,3-dialdehyde cellulose was confirmed by FT-IR, elemental analysis and XPS. The adsorbent was characterized by SEM, XRD, gas adsorption and TGA. The adsorbent had a high adsorption capacity (130 mg palladium per gram adsorbent) and enabled fast adsorption of palladium(II) ions from solution (80 % of maximum capacity reached in 2 h). Adsorbent materials suitable for both filters (fibrous) and column matrixes (spherical particles) could be obtained in an efficient manner by controlling the degree of oxidation while producing the DAC material.

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“…Self‐mineralization of the Pd cations on the surface of the E3‐M13 virus into PdNWs along the virus templates is induced by the oxidation of the chlorine ligand without any chemical reducing agents or surface stabilizers (Figure c). The pH drop from 4.18 to 3.60 after self‐mineralization of the PdNWs suggests the formation of by‐product acid (e.g., HClO) derived from the oxidation of chlorine ligands, thereby reducing the palladium ions . Finally, surface‐ligand free colloidal PdNW network structures were spontaneously synthesized by virus‐guided self‐crystallization under ambient conditions (Figure d).…”

Section: Resultsmentioning

confidence: 99%

Virus‐Templated Self‐Mineralization of Ligand‐Free Colloidal Palladium Nanostructures for High Surface Activity and Stability

Kim

Kang

et al. 2017

Adv Funct Materials

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In solution-based synthesis of colloidal nanostructures, additions of ligands, stabilizers, and redox reagents are generally required to obtain desirable structures, though ligands and stabilizers on the surface of nanostructures can substantially affect the surface-related activity. Accor dingly, an extensive rinsing process is usually required to remove residual reagents and stabilizers. This study reports a spontaneous self-biominerali zation of palladium (Pd) ions on a filamentous virus to form ligand-free Pd nanowires under ambient conditions. No reducing reagents or additional surface stabilizers are used; the genetically modified virus alone supports the polycrystalline Pd nanowires within the nanostructure, maintaining the clean surface even without a rinsing process. The advantage of the ligand-free Pd nanowires is found in the Suzuki-coupling reaction, in which the nanowire catalytic activity is maintained after repeated reactions, while conventional Pd colloids undergo surface contamination by the stabilizer and lose their catalytic activity during repeated uses. The ligand-free surface, high electronic connectivity, and structural stability of the Pd nano wires also allow high sensitivity and selectivity in hydrogen gas sensing analysis. This work emphasizes the importance of the ligand-free surface of biotemplated nanostructures in maintaining functionalities without surface contamination.

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Surface functionalized silica as a toolkit for studying aqueous phase palladium adsorption and mineralization on thiol moiety in the absence of external reducing agents

Cited by 17 publications

References 35 publications

Viral templated palladium nanocatalysts for dichromate reduction

Viral templated palladium nanocatalysts for dichromate reduction

A green and simple method for preparation of an efficient palladium adsorbent based on cysteine functionalized 2,3-dialdehyde cellulose

Virus‐Templated Self‐Mineralization of Ligand‐Free Colloidal Palladium Nanostructures for High Surface Activity and Stability

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