2020
DOI: 10.1021/acssuschemeng.0c04298
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Lignin-Directed Control of Silver Nanoparticles with Tunable Size in Porous Lignocellulose Hydrogels and Their Application in Catalytic Reduction

Abstract: Inspired by its unique porous structure, high value-added functional hydrogels combined with metal nanoparticles can lead to applications in different areas, including environmental catalysis. For this purpose, controlling the metal nanoparticle size is paramount. Herein, the porous lignocellulose hydrogel (LCG) with different lignin contents served as the matrix for in situ-synthesizing silver–lignin nanoparticles (Ag-L NPs), with lignin in the LCG as the reducing and capping agent of Ag-L NPs and the lignin … Show more

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Cited by 80 publications
(53 citation statements)
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References 56 publications
(74 reference statements)
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“…It should be noted here that the binding energy of Ag 3d 5/2 for LNP@Ag sample shifted to a higher value compared with those of the pure AgNPs reduced by sodium borohydride and the bulk Ag 0 , which has a standard binding energy of Ag 3d 5/2 at about 368.2 eV. 53 This suggests that the electron density of Ag atoms decreased, which might be ascribed to the embedding of AgNPs on the surface of lignin nanosphere. This observation is consistent with the results reported by Zhang et al 53 The loading amount of AgNPs on LNP@Ag spheres fabricated in different concentrations (3, 5, and 10 mg mL −1 ) of [Ag (NH 3 ) 2 ] + solution was respectively determined as 30.6, 46.8, and 47.2 wt%, by the inductively coupled plasma-optical emission spectroscopy (ICP-OES) measurements.…”
Section: Characterizations Of Lnp@ag Hybrid Nanoparticlesmentioning
confidence: 64%
“…It should be noted here that the binding energy of Ag 3d 5/2 for LNP@Ag sample shifted to a higher value compared with those of the pure AgNPs reduced by sodium borohydride and the bulk Ag 0 , which has a standard binding energy of Ag 3d 5/2 at about 368.2 eV. 53 This suggests that the electron density of Ag atoms decreased, which might be ascribed to the embedding of AgNPs on the surface of lignin nanosphere. This observation is consistent with the results reported by Zhang et al 53 The loading amount of AgNPs on LNP@Ag spheres fabricated in different concentrations (3, 5, and 10 mg mL −1 ) of [Ag (NH 3 ) 2 ] + solution was respectively determined as 30.6, 46.8, and 47.2 wt%, by the inductively coupled plasma-optical emission spectroscopy (ICP-OES) measurements.…”
Section: Characterizations Of Lnp@ag Hybrid Nanoparticlesmentioning
confidence: 64%
“…Thus, Ru 0.013 @NC f has a specific activity of 1.25 µmol mg −1 min −1 , which is higher than many of previously reported noble-metal-based catalysts (see Figure 4f and Table S3, Supporting Information). [49][50][51][52][53][54][55][56][57][58][59] In addition, the catalyst durability was probed by recycling the catalyst for subsequent reductions. As plotted in Figure 4g, Ru 0.013 @NC f could maintain over 95% conversion efficiency within five recycles, whereas Ru 0.013 @NC b and Ru 0.013 @C f experienced remarkable efficiency loss under the same condition.…”
Section: Aromatic Nitroreduction Activitymentioning
confidence: 99%
“…f) Specific activities of Ru 0.013 @NC f and noble-metal-based catalysts reported by literatures. [48][49][50][51][52][53][54][55][56][57][58] g) Variation of conversion efficiency for subsequent ANR with different catalysts. carried out.…”
Section: Aromatic Nitroreduction Activitymentioning
confidence: 99%
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“…In comparison with magnetic hydrogels, various kinds of smart biomaterials (e.g., scaffolds, biofilms, other smart hydrogels), which are activated by external stimuli, such as light, pH, temperature, stress, or charge, have great potential in biomedical applications [ 24 , 25 , 26 ]. However, the long response time and less precisely controlled architectures of these stimuli-responsive smart biomaterials are the two main limitations.…”
Section: Introductionmentioning
confidence: 99%