<i>In situ</i> infrared CO detection using silver loaded EMT zeolite films

Wang, Yuda; He, Hong; Sun, Jiao; Zhang, Xinyao; Zulpya, Mahmut; Zheng, Xianhong; Xu, Lin; Dong, Biao

doi:10.1039/d3na00238a

Cited by 2 publications

(1 citation statement)

References 33 publications

(41 reference statements)

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“…Therefore, it is crucial to confine the ultrasmall Ag NCs in suitable matrixes to limit their overgrowth and meanwhile provide appropriate crystal fields and site symmetry for tunable emission. So far, various host materials and related synthesis approaches have been applied to stabilize Ag NCs with different sizes and chemical states, such as the organic DNA/RNA, proteins, and polymers, as well as the inorganic glasses and zeolites. − …”

Section: Introductionmentioning

confidence: 99%

Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

Pan,

Ye,

Huang

et al. 2024

ACS Appl. Nano Mater.

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Faujasite (FAU) zeolites with abundant exchangeable sites are ideal hosts for the intake of Ag + and the stabilization of highly luminescent silver nanoclusters (Ag NCs), while theoretical calculations on the spectral characteristics, charge states, and electronic energies of Ag NCs that are confined inside FAU zeolite were seldom reported. In this research, the Na-type FAU zeolites with varying silicon-to-aluminum (Si/Al) ratios were first synthesized with the hydrothermal method and then applied as matrixes to stabilize Ag NCs to obtain tunable emissions. With the decrease in the Si/Al ratio, the Ag NCs show red-shifted emission from 515 to 548 nm and broadened photoluminescence of excitation (PLE) and photoluminescence (PL) spectral profile. The time-dependent density functional theory (TD-DFT) method was carried out to probe the effect of Al substitution on the charge states and the optical properties of Ag NCs confined inside the double-six ring (D6r) cavity. The simulated results of the absorption spectra and energy levels suggest that the S 1 → S 0 transition of the monovalent Ag 3 + cluster is responsible for the visible emission, and the increased full width at half-maximum (fwhm) of the PLE and PL spectra in the low Si/Al ratio FAU zeolites is due to the inhomogeneous broadening brought by the increased isomer numbers of the Al-substituted neutral zeolite framework. It is noted that the peak of the simulated absorption spectra red-shifted with the decrease in the Si/Al ratio, which is consistent with the experimental observation. This research provided an effective method for the manipulation of Ag NC emission in FAU zeolites through framework cation substitution and meanwhile theoretically explained the Si/Al ratio dependence of tunable emission properties, which may benefit the design of zeolite-confined Ag NCs with desirable optical performances.

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Section: Introductionmentioning

confidence: 99%

Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

Pan,

Ye,

Huang

et al. 2024

ACS Appl. Nano Mater.

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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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In situ infrared CO detection using silver loaded EMT zeolite films

Abstract: Ag-EMT nanozeolites-based in situ CO detection by oxidation of CO to CO2.

Cited by 2 publications

References 33 publications

Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

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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In situ infrared CO detection using silver loaded EMT zeolite films

Abstract: Ag-EMT nanozeolites-based in situ CO detection by oxidation of CO to CO2.

Cited by 2 publications

References 33 publications

Luminescence Properties and Theoretical Modeling of the Ag3 Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

Luminescence Properties and Theoretical Modeling of the Ag3 Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

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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Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor

Luminescence Properties and Theoretical Modeling of the Ag₃ Cluster Confined inside the D6r Cavity of Faujasite Zeolite: Implications for the Design of Tunable Emission Phosphor