Fiber-Optic Microfiber: Tracking Activity Enhancement and Suppression of Heterogeneous Photocatalysts

Huang, Yunyun; Liang, Jiaxuan; Chen, Pengwei; Wan, Jiaxin; Wu, Haotian; Wu, Xiaolan; Xiao, Aoxiang; Guan, Bai‐Ou

doi:10.1007/s42765-022-00245-5

Cited by 11 publications

(6 citation statements)

References 58 publications

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“…This represents the change rate of wavelength shifts. [ 16 ] The results showed that in the adsorption step, the adsorption rates of pollutants on the surfaces of various catalysts exhibited a consistent pattern, characterized by an initial rapid phase followed by a gradual deceleration and ultimately approached equilibrium. This was due to the similarity of the morphologies of these catalysts [ 42 ] as shown in Figure 4e .…”

Section: Resultsmentioning

confidence: 99%

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Operando Decoding of Surface Chemical and Thermal Events in Photoelectrocatalysis via a Lab‐Around‐Microfiber Sensor

Huang,

Mou,

Liang

et al. 2024

Advanced Science

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Operando decoding of the key parameters of photo‐electric catalysis provides reliable information for catalytic effect evaluation and catalytic mechanism exploration. However, to capture the details of surface‐localized and rapid chemical and thermal events at the nanoscale in real‐time is highly challenging. A promising approach based on a lab‐around‐microfiber sensor capable of simulating photo‐electric catalytic reactions on the surface of optical fibers as well as monitoring reactant concentration changes and catalytic heat generation processes is demonstrated. Due to the penetration depth of submicron size and the fast response ability of the evanescent field, the lab‐around‐microfiber sensor overcame the difficulty of reading instantaneous surface parameters in the submicron range. This sensor operando dismantled the changes in reactant concentration and temperature on the catalyst surface induced by light and voltage, respectively. It also decoded the impact of catalyst composition on the adsorption efficiency and catalytic efficiency across various wavelengths and determined the synchronized occurrence of pollutant degradation and catalytic thermal effects. Stable correlations between the real‐time parameters and catalytic activities are obtained, helping to provide a basic understanding of the catalytic process and mechanism. This approach fills an important gap in the current monitoring methods of catalytic processes and heat production.

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Section: Resultsmentioning

confidence: 99%

“…However, these methods usually require large and expensive instruments and complex operations. [ 16 ] Moreover, their primary focus predominantly lies on macroscopic scales in a postmortem manner, thereby lacking the capability for continuous in situ monitoring.…”

Section: Introductionmentioning

confidence: 99%

Operando Decoding of Surface Chemical and Thermal Events in Photoelectrocatalysis via a Lab‐Around‐Microfiber Sensor

Huang,

Mou,

Liang

et al. 2024

Advanced Science

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“…For the optical microfiber, the assembled GO layer as a support for other nanointerfaces could extract more energy from the HE 12 mode to form an evanescent field with higher energy, [ 22 ] as demonstrated in the transverse electric field amplitude distribution of the HE 12 mode in Figure 3D. Thus, the sensor sensitivities of the microfibers with a GO supporting layer were improved.…”

Section: Resultsmentioning

confidence: 99%

Marriage of a Dual‐Plasmonic Interface and Optical Microfiber for NIR‐II Cancer Theranostics

Wu,

Chen,

Zhan

et al. 2023

Advanced Materials

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The use of light as a powerful tool for disease treatment has introduced a new era in tumor treatment and provided abundant opportunities for light‐based tumor theranostics. This work reports a photothermal theranostic fiber integrating cancer detection and therapeutic functions. Its self‐heating effect can be tuned at ultralow powers and used for self‐heating detection and tumor ablation. The fiber, consisting of a dual‐plasmonic nanointerface and an optical microfiber, can be used to distinguish cancer cells from normal cells, quantify cancer cells, perform hyperthermal ablation of cancer cells, and evaluate the ablation efficacy. Its cancer cell ablation rate reaches 89% in a single treatment. In vitro and in vivo studies reveal quick, deep‐tissue photonic hyperthermia in the NIR‐II window, which can markedly ablate tumors. The marriage of a dual‐plasmonic nanointerface and an optical microfiber presents a novel paradigm in photothermal therapy, offering the potential to surmount the challenges posed by limited light penetration depth, nonspecific accumulation in normal tissues, and inadvertent damage in current methods. This work thus provides insight for the exploration of an integrated theranostic platform with simultaneous functions in cancer diagnostics, therapeutics, and postoperative monitoring for future practical applications.

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“…[9] To overcome these limitations, solar photocatalytic oxidation is a promising emerging technology investigated by several researchers, where the use of metal oxide-based systems in combination with solar light irradiation allows it to work under milder conditions. [10][11][12] The process involves the use of a semiconductor photocatalyst that, irradiated with suitable wavelengths (preferentially the natural or simulated solar light), gives rise to the promotion of electrons from the valence to the conduction band of the semiconductor with the contextual generation of holes in the valence band. Electrons and holes react with oxygen and water, giving rise to superoxide and hydroxide radicals able to degrade VOCs.…”

Section: Introductionmentioning

confidence: 99%

Abatement of Volatile Organic Compounds Employing a Thermoplastic Nano‐Photocatalyst Layered on a Glass Reactor

Vento,

Nicosia,

Fiorenza

et al. 2024

ChemPhotoChem

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Industrial development and urbanization increase the emission of Volatile Organic Compounds (VOCs) into the atmosphere, causing environmental and health risks. Several approaches are used for their abatement, including chemical, thermo‐ and photo‐catalytic oxidations, but without fully satisfying results. In this work, a thermoplastic TiO2‐based photo‐catalyst was used as a coating of a glass‐reactor. Solar‐triggered photocatalytic degradation of ethanol, toluene, and acetone (chosen as model VOCs) highlights a better performance of the coated photoreactor rather th the one exhibited by TiO2 nanopowder. The influence of the pollutant flow rate on the photodegradation performance of the system is also investigated, revealing an inverse relationship between degradation and flow rates. The experimental data suggest that our approach provides a cheap and efficient way to boost the abatement of VOCs, useful for further industrial‐scale applications. The morphology and the compositional homogeneity of the nanocomposite coating are addressed through Field Emission Scanning Electron Microscopy coupled with Energy Dispersive X‐ray Analysis.

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Fiber-Optic Microfiber: Tracking Activity Enhancement and Suppression of Heterogeneous Photocatalysts

Cited by 11 publications

References 58 publications

Operando Decoding of Surface Chemical and Thermal Events in Photoelectrocatalysis via a Lab‐Around‐Microfiber Sensor

Operando Decoding of Surface Chemical and Thermal Events in Photoelectrocatalysis via a Lab‐Around‐Microfiber Sensor

Marriage of a Dual‐Plasmonic Interface and Optical Microfiber for NIR‐II Cancer Theranostics

Abatement of Volatile Organic Compounds Employing a Thermoplastic Nano‐Photocatalyst Layered on a Glass Reactor

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