Fabrication of Au aerogels with {110}-rich facets by size-dependent surface reconstruction for enzyme-free glucose detection

Wang, Cui; Duan, Wenchao; Xing, Lixiang; Xiahou, Yujiao; Du, Wei; Xia, Haibing

doi:10.1039/c9tb01653h

Cited by 10 publications

(25 citation statements)

References 48 publications

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“…The Au aerogels with exposed (110) facets were developed to construct the enzyme-free glucose biosensors because the literature reported that the (110) facet of Au NPs is more active for glucose oxidation. 49 By taking advantage of the facet engineering, the optimized Au aerogels with the largest ratio of (110) facets displayed the splendid catalytic activity, reproducibility, and long-term stability for glucose detection with the 2 s response time, a high sensitivity (2044.71 mA cm −2 mM −1 ), and an ultralow LOD (0.58 mM). These works suggested the NMAs are promising candidates for electrochemical biosensors.…”

Section: Applicationsmentioning

confidence: 99%

Noble Metal Aerogels

Wang

Fang

et al. 2020

ACS Appl. Mater. Interfaces

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Noble metal-based nanomaterials have been a hot research topic during the past few decades. Particularly, self-assembled porous architectures have triggered tremendous interest. At the forefront of porous nanostructures, there exists a research endeavor of noble metal aerogels (NMAs), which are unique in terms of macroscopic assembly systems and three-dimensional (3D) porous network nanostructures. Combining excellent features of noble metals and the unique structural traits of porous nanostructures, NMAs are of high interest in diverse fields, such as catalysis, sensors, and self-propulsion devices. Regardless of these achievements, it is still challenging to rationally design well-tailored NMAs in terms of ligament sizes, morphologies, and compositions and profoundly investigate the underlying gelation mechanisms. Herein, an elaborate overview of the recent progress on NMAs is given. First, a simple description of typical synthetic methods and some advanced design engineering are provided, and then, the gelation mechanism models of NMAs are discussed in detail. Furthermore, promising applications particularly focusing on electrocatalysis and biosensors are highlighted. In the final section, brief conclusions and an outlook on the existing challenges and future chances of NMAs are also proposed.

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Section: Applicationsmentioning

confidence: 99%

Noble Metal Aerogels

Wang

Fang

et al. 2020

ACS Appl. Mater. Interfaces

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“…Wang et al prepared PtSn alloy aerogels by the wet chemical method. The high density of defects between the nanoparticles in the aerogel structure improves the intrinsic activity of active sites [50]. Similar defect structures have been discovered in many research studies about aerogels, but no one has quantitatively studied the effect of defects on electrocatalysis.…”

Section: Other Structuresmentioning

confidence: 57%

Preparation and Electrocatalysis Application of Pure Metallic Aerogel: A Review

Zhang

Zhao

2020

Catalysts

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Nanomaterials are widely used in electrocatalysts due to their quantum size effect and high utilization efficiency. There are two ways to improve the activity of nanoelectrocatalysts: increasing the number of active sites and improving the inherent activity of each catalytic site. The structure of the catalyst itself can be improved by increasing the number of exposed active sites per unit mass. The high porosity and three-dimensional network structure enable aerogels to have the characteristics of a large specific surface area, exposing many active sites and bringing structural stability through the self-supporting nature of aerogels. Thus, by adjusting the compositions of aerogels, the synergetic effect introduced by alloy elements can be utilized to further improve the single-site activity. In this review, we summarized the basic preparation strategy of aerogels and extended it to the preparation of alloys and special structure aerogels. Moreover, through the eight electrocatalysis cases, the outstanding catalytic performances and broad applicability of aerogel electrocatalysts are emphasized. Finally, we predict the future development of pure metallic aerogel electrocatalysts from the perspective of preparation to application.

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“…Motivated by the urgency of human social and environmental issues, research on novel and advanced metallic nanomaterials for catalysis, electronics, and optics − has attracted intensive attention from both academic and industrial communities. Regarding the structural configuration of materials at the nanoscale, the interlocked monomeric particles in three-dimensional metallic nanonetworks (3D-MNWs) lead to many advantageous properties, such as high structural stability, large surface area, and excellent thermal and electronic conductivity, providing great promise for potential applications.…”

Section: Introductionmentioning

confidence: 99%

“…This result implies that nanobubble has a possibility to act as stabilizer, like the surfactant, to stabilize the nanoparticles in aqueous solution. Usually, the 3D-MNWs are synthesized by destabilizing a colloidal solution containing metallic nanoparticles, followed by an aging process. ,− The destabilization of the colloidal nanoparticles should be fine controlled to ensure the occurrence of destabilization, while also avoiding overwhelming agglomeration of nanoparticles. Considering that the nature of the interaction (a surface strain effect on the nanoscale that happens on the gas–solid–liquid three-phase interface) between nanobubbles and nanoparticles is a weak physical force rather than a strong chemical binding, it is speculated that nanobubble may act as a proper protective agent or template to construct 3D-MNWs without a secondary destabilizing process.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Free Synthesis of Three-Dimensional Metallic Nanonetworks via Nanobubble-Assisted Self-Assembly

Liang

Cai

et al. 2021

Langmuir

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Three-dimensional metallic nanonetworks (3D-MNWs) demonstrate unique performances across a wide range of fields, and their facile and green synthetic method is of high significance. Herein, we report a self-generated-nanobubble scaffolding strategy for the fabrication of 3D-MNWs, which employs aqua ammonia (AA) as a nanobubble reservoir and avoids the use of any surfactants or polymeric capping agents. Benefiting from the interaction between ammonia and metallic nanoparticles, finely interlocked nanonetworks (Au, Pt, Ag, and Cu) with curved geometry and abundant pores are obtained by precisely controlling the anisotropic kinetic growth using a strong reducing agent and a high concentration of AA. As a demonstration, the methanol oxidation reaction (MOR) is tested to assess the electrocatalytic performance of the Pt 3D-MNWs. The peak current of Pt 3D-MNWs reaches 152 mA/mgPt, which is 2.5 times higher than that of commercial Pt black. This unique nanobubble-assisted strategy has great potential in the basic synthetic prototype for polyporous nanomaterials.

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Fabrication of Au aerogels with {110}-rich facets by size-dependent surface reconstruction for enzyme-free glucose detection

Abstract: Au6–50 aerogels with {110}-rich facets (35.5%) are fabricated for glucose detection by size-dependent surface reconstruction between two differently-sized gold nanoparticles.

Cited by 10 publications

References 48 publications

Noble Metal Aerogels

Noble Metal Aerogels

Preparation and Electrocatalysis Application of Pure Metallic Aerogel: A Review

Surfactant-Free Synthesis of Three-Dimensional Metallic Nanonetworks via Nanobubble-Assisted Self-Assembly

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