Shell-isolated nanoparticle-enhanced Raman spectroscopy

Zhang, Yuejiao; Ze, Huajie; Kudelski, Andrzej; Fernández-Vidal, Julia; Hardwick, Laurence J.; Lipkowski, Jacek; Tian, Zhong‐Qun; Li, Jian‐Feng

doi:10.1038/s43586-023-00217-y

Cited by 15 publications

(10 citation statements)

References 124 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…52 It needs to be emphasized that the nanosensors embedded into the catalyst are not limited to nanothermometers. Nanoparticles can be versatile functional nanosensors, e.g., Au@SiO 2 , to detect surface−hydrocarbon intermedia by confocal Raman spectroscopy 8,53 and to satisfy the needs of spatiotemporalresolved characterization of local conditions, chemical species, and surface intermedia within the individual catalyst.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Tian,

Gao,

Xie

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

Temperature is a critical parameter in chemical conversion, significantly affecting the reaction kinetics and thermodynamics. Measuring temperature inside catalyst particles of industrial interest (∼micrometers to millimeters), which is crucial for understanding the evolution of chemical dynamics at catalytic active sites during reaction and advancing catalyst designs, however, remains a big challenge. Here, we propose an approach combining two-photon confocal microscopy and state-of-the-art upconversion luminescence (UL) imaging to measure the spatiotemporal-resolved temperature within individual catalyst particles in the industrially significant methanol-to-hydrocarbons reaction. Specifically, catalyst particles containing zeolites and functional nanothermometers were fabricated using microfluidic chips. Our experimental results directly demonstrate that the zeolite density and particle size can alter the temperature distribution within a single catalyst particle. Importantly, the observed temperature heterogeneity plays a decisive role in the activation of the reaction intermediate and the utilization of active sites. We expect that this work opens a venue for unveiling the reaction mechanism and kinetics within industrial catalyst particles by considering temperature heterogeneity.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Tian,

Gao,

Xie

et al. 2024

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…In Situ Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy (SHINERS). The synthesis of SiO 2 -coated Au nanoparticles (Au@SiO 2 NPs) for SHINERS experiments was carried out following the protocol described by Tian et al 34,35 2.4 mL of 1% HAuCl 4 (99.9% Sigma-Aldrich) was added to 200 mL of ultrapure water (Milli-Q, 18.2 MΩ). The resulting solution was refluxed to 90 °C under vigorous stirring.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Effect of a Physisorbed Tetrabutylammonium Cation Film on Alkaline Hydrogen Evolution Reaction on Pt Single-Crystal Electrodes

Fernández-Vidal,

Koper

2024

ACS Catal.

Self Cite

View full text Add to dashboard Cite

The addition of tetrabutylammonium (TBA+) to alkaline electrolytes enhances the hydrogen evolution reaction (HER) activity on Pt single-crystal electrodes. The concentration of TBA+ significantly influences the HER on Pt(111). Concentrations of ≤1 mM yield no significant effect on HER currents or the coverage of adsorbed hydrogen (H*) but exhibit an interaction with the OHads on the surface. Conversely, concentrations of >1 mM result in an apparent site-blocking effect for underpotential-deposited H* caused by the physisorption of the organic cation, which counterintuitively leads to an increase in the HER activity. The physisorption of TBA+ is linked to its accumulation in the diffuse layer, as it can be reversibly removed by the addition of nonadsorbing cations such as sodium. Following the previous literature on the TBA+ interaction with electrode surfaces, we ascribe this effect to the formation of a two-dimensional TBA+ film in the double layer. On stepped Pt single-crystal surfaces, TBA+ enhances HER activity at all concentrations, primarily at step sites. Our findings not only highlight the complexities of TBA+ accumulation on Pt electrodes but also offer important molecular-level insights for optimizing the HER by organic film formation on various atomic-level electrode structures.

show abstract

“…These methods provide accurate detection of OTC; however, they demand expensive equipment, tedious sample extraction procedures, and expert technical skills. , Surface-enhanced Raman scattering (SERS) is a powerful detection technique for identifying molecules without the influence of water. − The application of SERS are very useful in detecting different molecules, − including antibiotics such as OTC . However, the traditional SERS substrate still lacks sensitivity for detecting antibiotics with similar structures. − Developing a new substrate for SERS to detect antibiotics with high sensitivity and selectivity is still in great demand. − …”

Section: Introductionmentioning

confidence: 99%

Detection of Oxytetracycline on NH₂–UiO-66(Zr)@Au NPs with High Sensitivity and Selectivity by SERS

Chen,

Liu,

Guan

et al. 2023

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

The detection of antibiotics has attracted great attention among scientists and health researchers in the past decades. However, it is still difficult to realize the sensitive and selective detection of antibiotics with similar structures. Herein, the antibiotic molecules of oxytetracycline (OTC) can be sensitively and selectively detected by surface-enhanced Raman spectroscopy (SERS) on NH 2 −UiO-66(Zr)@Au nanoparticles (NPs). The SERS substrate of NH 2 −UiO-66(Zr)@Au NPs realizes a detection sensitivity of 1 × 10 −12 g•L −1 for 4-mercaptobenzoic acid, indicating its high SERS activity. A high detection sensitivity of 10 −11 g•L −1 is obtained for OTC on such a SERS substrate. Besides the high sensitivity, NH 2 −UiO-66(Zr)@Au NPs can also selectively detect OTC from streptomycin sulfate, salicylic acid, and ofloxacin by SERS on NH 2 −UiO-66(Zr)@Au NPs, with a selective detection limit of 10 −10 g•L −1 . Furthermore, OTC can be selectively detected in a real sample of river water with a detection limit of 1.0 × 10 −10 g•L −1 . Therefore, this study provides an effective way to enrich and detect antibiotics in real samples in the environment.

show abstract

Shell-isolated nanoparticle-enhanced Raman spectroscopy

Cited by 15 publications

References 124 publications

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Effect of a Physisorbed Tetrabutylammonium Cation Film on Alkaline Hydrogen Evolution Reaction on Pt Single-Crystal Electrodes

Detection of Oxytetracycline on NH₂–UiO-66(Zr)@Au NPs with High Sensitivity and Selectivity by SERS

Contact Info

Product

Resources

About

Shell-isolated nanoparticle-enhanced Raman spectroscopy

Cited by 15 publications

References 124 publications

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Spatiotemporal Heterogeneity of Temperature and Catalytic Activation within Individual Catalyst Particles

Effect of a Physisorbed Tetrabutylammonium Cation Film on Alkaline Hydrogen Evolution Reaction on Pt Single-Crystal Electrodes

Detection of Oxytetracycline on NH2–UiO-66(Zr)@Au NPs with High Sensitivity and Selectivity by SERS

Contact Info

Product

Resources

About

Detection of Oxytetracycline on NH₂–UiO-66(Zr)@Au NPs with High Sensitivity and Selectivity by SERS