Highly Uniform Fabrication of Gold Nanoparticles on Carbon Nanotube Sheets for Sensors Based on Surface-Enhanced Raman Spectroscopy with Improved Reproducibility

Fang, Weichen; Zhang, Zhen; Miao, Naiqian; Yang, Rong; Zuo, Xu; Shen, Xiaodong; Cao, Yang; Xin, Wenbo

doi:10.1021/acsanm.3c01989

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…Recently, carbon materials, such as graphene, carbon nanotubes, and porous carbon, could be considered as effective matrices to stabilize the nanoparticles and boost enzyme-like activity. Particularly, N-doped porous carbon (NPC) has drawn enormous attention owing to its advantages of hierarchical porous structure, large surface area, and plentiful active sites. − The N atoms available in the porous carbon could not only induce the dispersion of Au seeds but also improve the stability of AuNPs .…”

Section: Introductionmentioning

confidence: 99%

Nanozyme Sensor Based on Au Nanoparticles/N-Doped Porous Carbon Composites for Biosensing

Chen,

Zhang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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The rational construction of nanomaterials with boosted peroxidase (POD)-like activity is momentous in artificial enzyme design and biological catalytic fields. Herein, a hybrid nanozyme, gold nanoparticles/N-doped porous carbon (AuNPs/ NPC), is fabricated via a supramolecular assembly-assisted pyrolysis strategy and engineered as a peroxidase mimic. In this strategy, a melamine-cyanurate supramolecular aggregate can be employed not only as a self-vanishing template to gain porous morphology but also as a nitrogen source to achieve an exceptional high N doping. The obtained NPC is then subsequently used to immobilize AuNPs via an in situ reduction approach. Benefiting from well-dispersed ultrafine AuNPs, high N content, hierarchical porous architecture, and the synergistic effect of AuNPs and NPC, the fabricated nanozyme exhibits enhanced POD-like activity, making it a potential alternative to peroxidase mimics. Besides, the AuNPs/NPC shows highly electrocatalytic properties, which could serve as a signal amplification platform for ultrasensitively detecting hydrogen peroxide (H 2 O 2 ). The hybrid nanozyme-based electrochemical sensor shows a linear relationship within 0.2− 7000 μM. Significantly, the sensitivity and limit of detection of the fabricated sensor are 285.9 μA mM −1 cm −2 and 67 nM, respectively. Also, this biosensor is applied to detect H 2 O 2 in human serum samples and A549 cells with desirable results. Therefore, the present work offers a facile strategy for the fabrication of a high N-contained hybrid nanozyme to simulate the catalytic activity of natural enzymes and exhibits broad prospects in biosensing, mimicking-enzyme catalytic fields, and clinical diagnosis.

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Section: Introductionmentioning

confidence: 99%

Nanozyme Sensor Based on Au Nanoparticles/N-Doped Porous Carbon Composites for Biosensing

Chen,

Zhang,

Liu

et al. 2024

ACS Appl. Nano Mater.

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Half‐Full Filled Aerogels with a 348% Increment in Energy Absorption and a Retained High Electromagnetic Shielding Performance

Kong,

Lv,

et al. 2024

Adv Funct Materials

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Aerogels, as kinetic energy absorbing materials, can find crucial applications for safeguarding in transportation, sports, buildings, construction, and aerospace. However, the highly porous structure makes it extremely fragile for endurance usage. In this study, a half‐full filled structure has been proposed, and the concept has been demonstrated based on shear thickening fluid (STF) and chemically vapor deposited carbon nanotube aerogels (CNTAs), in which the outer part of CNTA is filled with STF while the inner core keeping unfilled. Chemical vapor deposition significantly enhances the elasticity and electromagnetic shielding performance of the native CNTA. The half‐full filled aerogels (HFFA) show a 348% increase in energy absorption compared to the CNTA. At the same time, the density, electronic conductivity, and electromagnetic interference shielding effectiveness (EMI SE) of the HFFAs are 0.117 g cm−3, 1213 S m−1, and 69.52 dB (which is a neglectable reduction of 0.63% compared to native CNTA), respectively. The HFFA strategy provides an alternative route to fabricate robust aerogels with a remarkable increase of target properties while maintaining other properties, such as low density, high pore volume, and conductivity, with limited changes.

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In situ and bio-green synthesis of silver nanoparticles immobilized on zeolite as a recyclable catalyst for the degradation of OPDs

Zhou,

He,

Ren

et al. 2024

Sci Rep

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In this study, silver nanoparticles (Ag-NPs) were synthesized using a green and biologically inspired approach by utilizing reducing compounds from Thyme plant leaves. Zeolite was used to immobilize the synthesized Ag-NPs (Ag@Z). The modified Zeolite served as a catalyst for the reduction reaction of various organic pollutant dyes (OPDs) including 4-nitrophenol (4-NP), 4-nitroaniline (4-NA), methylene blue (MB), and methyl orange (MO) with sodium borohydride. The degradation of OPDs was monitored by measuring changes in their maximum absorption wavelength intensity. A thorough examination of multiple parameters (catalyst, silver and sodium borohydride dosage, yield degradation, and reaction time) was carried out to identify the optimized conditions for the degradation of OPDs. The results showed that the Ag@Z catalyst achieved an efficiency of over 93% in less than 10 min for the degradation of OPDs. The recoverability and reusability of the catalyst were examined, revealing a partial loss in efficiency after four recovery stages. Structural analysis using XRD, SEM, and TEM techniques confirmed the characteristics and morphology of the synthesized catalyst.

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Highly Uniform Fabrication of Gold Nanoparticles on Carbon Nanotube Sheets for Sensors Based on Surface-Enhanced Raman Spectroscopy with Improved Reproducibility

Cited by 3 publications

References 45 publications

Nanozyme Sensor Based on Au Nanoparticles/N-Doped Porous Carbon Composites for Biosensing

Nanozyme Sensor Based on Au Nanoparticles/N-Doped Porous Carbon Composites for Biosensing

Half‐Full Filled Aerogels with a 348% Increment in Energy Absorption and a Retained High Electromagnetic Shielding Performance

In situ and bio-green synthesis of silver nanoparticles immobilized on zeolite as a recyclable catalyst for the degradation of OPDs

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