Multi-step polymer degradation kinetics using activation energy-dependent cataluminescence

Li, Zenghe; Feng, Jing; Tian, Rui; Lu, Chao

doi:10.1039/d2gc00039c

Cited by 13 publications

(7 citation statements)

References 38 publications

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“…On the other hand, the characteristic information that differs among compounds based on catalysts comes from the discrepant adsorption–catalysis–desorption processes, , which was probably related to the chemical structure of the explosive compounds and further influence the catalytic oxidation process. As can be seen from Figure S11, it is not difficult to find that the CTL spectra of NB and m-DNB only showed a maximum emission peak at 460 nm, two of which appear in the spectral curves of m-MNT, PNT, DNT, and TNT located at 425 and 460 nm.…”

Section: Resultsmentioning

confidence: 99%

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Chen

Xie

et al. 2023

Anal. Chem.

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With the intensification of explosive-based terrorism attack and environmental concerns, the innovation of high-efficiency and portable sensors for facile, rapid, and reliable monitoring of explosives has become one of the major demands in societies. Herein, a reliable and easy-to-use cataluminescence sensor system based on Dy 3+ doping La 2 O 3 nanorod catalysts has been developed for the identification and detection of six types of military explosive vapors, including homologous compounds and even isomers. The efficient discrimination is to make full use of the thermodynamic and kinetic information that can be extracted from the catalytic oxidation process of explosive molecules on various sensing materials, that is, the response signal and response time to generate the fingerprint of each target compound, while the rapid detection of the strategy can be manifested in response toward six military explosive vapors within 2.5 s and recover within 4 s. Meanwhile, the quantitative analysis of the explosives by the sensor system was realized based on 0.8% Dy:La 2 O 3 with optimal catalytic activity, and the detection limits of NB, m-MNT, m-DNB, PNT, DNT, and TNT can reach 0.62, 0.49, 0.63, 0.38, 0.023, and 0.067 μg mL −1 . In this research, we also constructed a novel sensor device and detection platform for explosive monitoring, which is of great significance for providing a new sensing principle for the efficient identification of explosives.

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Section: Resultsmentioning

confidence: 99%

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Chen

Xie

et al. 2023

Anal. Chem.

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“…(D) Cataluminescence dynamic curves in the POM aging process under different heating temperatures of 150, 165, 175, and 185 °C in air (left) and nitrogen (right) atmospheres. Reproduced with permission from ref . Copyright 2022 Royal Society of Chemistry.…”

Section: Characterization For Generation Of Low-molecular Productsmentioning

confidence: 99%

“…Cataluminescence is an ultrasensitive strategy that could record the luminescence signals generated from a catalytic reaction. The authors of this review have employed cataluminescence to distinguish the same products generated from the different pathways for polymers . Polyoxymethylene (POM) was taken as an example, which could generate the same products from the different pathways as end-rupture and auto-oxidation reactions.…”

Section: Characterization For Generation Of Low-molecular Productsmentioning

confidence: 99%

“…The authors of this review have employed cataluminescence to distinguish the same products generated from the different pathways for polymers. 290 Polyoxymethylene (POM) was taken as an example, which could generate the same products from the different pathways as end-rupture and autooxidation reactions. The formaldehyde generated from POM could exhibit cataluminescence when catalyzed to form CO 2 and formic acid in their excited states, and the cataluminescence signal could be monitored dynamically as a function of time.…”

Section: Monitoring Aged Products By Optical Spectroscopymentioning

confidence: 99%

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Characterization Techniques of Polymer Aging: From Beginning to End

Tian

Lin

et al. 2023

Chem. Rev.

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Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure−property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.

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“…The CL process can occur in liquid, gas, or solid phases, among which cataluminescence (CTL) , is one of the transduction principles of CL generated from the luminescence phenomenon during the catalytic oxidation reaction of compounds at the gas–solid interface . Because of the advantages of miniaturization and portability, rapid and reversible response, high selectivity, and low cost, CTL sensor systems in the booming development have received enormous attention − and have been widely applied in the detection and identification of toxic and harmful gases, which have made important contributions to environmental problems, , quality monitoring, catalyst evaluation, − and clinical diagnosis . Nevertheless, in the abovementioned application fields, there is an increasing demand for even higher sensitivity, accuracy, stability, and more species to test.…”

Section: Introductionmentioning

confidence: 99%

Efficient Photoinduced Thermocatalytic Chemiluminescence System Based on the Z-Scheme Heterojunction Ag₃PO₄/Ag/Bi₄Ti₃O₁₂ for H₂S Sensing

Song

Chen

et al. 2022

Anal. Chem.

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Cataluminescence as a highly efficient gas transduction principle has attracted wide attention among research in environmental monitoring and clinical diagnosis with increasing awareness of human safety. Nowadays, the development of innovation sensing systems and the construction of the sensing mechanism to improve the analytical performance of compounds remain a major challenge. Herein, we construct an advanced photoinduced thermocatalytic chemiluminescence (PI-TC-CL) gas-sensing system via the introduction of a Z-scheme heterojunction Ag3PO4/Ag/Bi4Ti3O12 to achieve higher efficient detection of H2S. The unique electron transport path of the Z-scheme heterojunction and the LSPR effect of Ag nanoparticles fascinate the generation of the photoinduced electron–hole pair on the surface of catalysts when stimulated by LED lamps and slow down the recombination of electron–hole pairs under thermal conditions. Thus, based on the cooperative effect of the Z-scheme heterojunction AgPO/Ag/BTO and PI-TC-CL system, we have successfully established an efficient H2S CTL detection system, which has a response three times higher than that on the traditional CTL system and even 45 times higher than that on BTO and ranges among the best of the state-of-the-art CTL performance in H2S detection with the linear range of 0.095–8.87 μg mL–1 and a limit of detection of 0.0065 μg mL–1. Besides, to explore the gas-sensing mechanism, the synergetic effects of photoinduction and thermal catalysis are investigated thoroughly via conductivity and electrochemical experiments. This research provides a new perspective of engineering highly efficient catalysts and ingenious sensor systems through designing the nanostructure of materials and synergism catalytic mechanism.

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Multi-step polymer degradation kinetics using activation energy-dependent cataluminescence

Abstract: Understanding the mechanism of polymer degradation is vital to aid the development of rational strategies for polymer management. However, the conventional techniques for polymer degradation evaluation relied on the determination...

Cited by 13 publications

References 38 publications

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Characterization Techniques of Polymer Aging: From Beginning to End

Efficient Photoinduced Thermocatalytic Chemiluminescence System Based on the Z-Scheme Heterojunction Ag₃PO₄/Ag/Bi₄Ti₃O₁₂ for H₂S Sensing

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Multi-step polymer degradation kinetics using activation energy-dependent cataluminescence

Abstract: Understanding the mechanism of polymer degradation is vital to aid the development of rational strategies for polymer management. However, the conventional techniques for polymer degradation evaluation relied on the determination...

Cited by 13 publications

References 38 publications

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy3+ Doping a La2O3-Based Cataluminescence Sensor System

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy3+ Doping a La2O3-Based Cataluminescence Sensor System

Characterization Techniques of Polymer Aging: From Beginning to End

Efficient Photoinduced Thermocatalytic Chemiluminescence System Based on the Z-Scheme Heterojunction Ag3PO4/Ag/Bi4Ti3O12 for H2S Sensing

Contact Info

Product

Resources

About

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Instant Fingerprint Discrimination for Military Explosive Vapors by Dy³⁺ Doping a La₂O₃-Based Cataluminescence Sensor System

Efficient Photoinduced Thermocatalytic Chemiluminescence System Based on the Z-Scheme Heterojunction Ag₃PO₄/Ag/Bi₄Ti₃O₁₂ for H₂S Sensing