Endogenous Photosensitizers in Human Skin

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(16), P. 9720 - 9785

Published: July 17, 2023

Endogenous photosensitizers play a critical role in both beneficial and harmful light-induced transformations biological systems. Understanding their mode of action is essential for advancing fields such as photomedicine, photoredox catalysis, environmental science, the development sun care products. This review offers comprehensive analysis endogenous human skin, investigating connections between electronic excitation subsequent activation or damage organic biomolecules. We gather physicochemical photochemical properties key examine relationships chemical reactivity, location within primary biochemical events following solar radiation exposure, along with influence on skin physiology pathology. An important take-home message this that photosensitization allows visible light UV-A to have large effects skin. The presented here unveils potential causes continuous increase global cancer cases emphasizes limitations current protection approaches.

Language: Английский

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Discerning the Relevance of Singlet Oxygen in Pollutant Degradation in Peroxymonosulfate Activation Processes

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(31), P. 14005 - 14012

Published: July 23, 2024

Significant efforts have recently been exerted toward construction of singlet oxygen (

Language: Английский

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Development of a Five-Chemical-Probe Method to Determine Multiple Radicals Simultaneously in Hydroxyl and Sulfate Radical-Mediated Advanced Oxidation Processes

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(12), P. 5616 - 5626

Published: March 12, 2024

Advanced oxidation processes (AOPs), such as hydroxyl radical (HO•)- and sulfate (SO4•–)-mediated oxidation, are attractive technologies used in water wastewater treatments. To evaluate the treatment efficiencies of AOPs, monitoring primary radicals (HO• SO4•–) well secondary generated from reaction HO•/SO4•– with matrices is necessary. Therefore, we developed a novel chemical probe method to examine five key simultaneously, including HO•, SO4•–, Cl•, Cl2•–, CO3•–. Five probes, nitrobenzene, para-chlorobenzoic acid, benzoic 2,4,6-trimethylbenzoic 2,4,6-trimethylphenol, were selected this study. Their bimolecular rate constants diverse first calibrated under same conditions minimize systematic errors. Three typical AOPs (UV/H2O2, UV/S2O82–, UV/HSO5–) tested obtain steady-state concentrations. The effects dissolved organic matter, Br–, concentration inspected. Our results suggest that five-probe can accurately measure HO•- SO4•–-mediated when Br– DOM less than 4.0 μM 15 mgC L–1, respectively. Overall, practical easily accessible determine multiple simultaneously.

Language: Английский

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Generation, properties, and applications of singlet oxygen for wastewater treatment: a review

Environmental Chemistry Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

Language: Английский

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Treatment of high-salinity organic wastewater by advanced oxidation processes: Research progress and prospect

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 60, P. 105272 - 105272

Published: April 1, 2024

Language: Английский

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Photosensitized Transformation of Peroxymonosulfate in Dissolved Organic Matter Solutions under Simulated Solar Irradiation

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(3), P. 1963 - 1972

Published: Jan. 20, 2022

Sulfate radical (SO4•–)-mediated advanced oxidation processes via peroxymonosulfate (PMS) activation have been extensively investigated. However, the phototransformation of PMS in sunlit dissolved organic matter (DOM) solution has not previously examined. For first time, photosensitized transformation DOM-enriched solutions under simulated solar irradiation was observed. The generation reactive species, including 1O2, SO4•–, and •OH, confirmed by electron paramagnetic resonance quantified chemical probes. SO4•– primary species generated reaction excited triplet DOM (3DOM*) with PMS. 3DOM* acted as a reductant quickly oxidized PMS, an estimated rate constant (4.09 ± 0.21) × 108 M–1 s–1. Compared to 3DOM*, one-electron-reducing (DOM•–) minor contributor contribution DOM•– relied on phenolic constituents. In addition, series different types DOM, terrestrial autochthonous effluent its fractions, were employed examine kinetics Overall, irradiated could be useful economical approach generate environmentally relevant conditions.

Language: Английский

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Single-atom zinc catalyst for co-production of hydrogen and fine chemicals in soluble biomass solution

Advanced Powder Materials, Journal Year: 2022, Volume and Issue: 1(4), P. 100058 - 100058

Published: May 14, 2022

Single-atom photocatalysts (SAPCs) have attracted great interests due to their remarkable atom utilization efficiency, excellent activity, and selectivity, yet no application in synchronous biorefinery water splitting. Here, efficient SAPCs based on atomically dispersed Zn atoms carbon nitride (named Zn−mCN) were produced. Experiments verified that Zn−mCN has widened adsorption range of visible-light lowered ability electron−hole recombination, leading photocatalytic redox activity for splitting co-produce lactic acid (selectivity up 91.0%) hydrogen (∼15898.8 ​μmol ​g−1 ​h−1). This system universality small- molecule monosaccharides macromolecular xylan. Poisoning experiments showed h+, 1O2, ·O2− ·OH can promote the simultaneous production hydrogen. work realized full whole reaction provided a novel strategy concomitant value-added chemicals from biomass-derived feedstocks aqueous solutions.

Language: Английский

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Impact of water matrices on oxidation effects and mechanisms of pharmaceuticals by ultraviolet-based advanced oxidation technologies: A review

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 844, P. 157162 - 157162

Published: July 5, 2022

Language: Английский

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Recent advances in electrocatalytic membrane for the removal of micropollutants from water and wastewater

iScience, Journal Year: 2022, Volume and Issue: 25(5), P. 104342 - 104342

Published: May 1, 2022

The increasing occurrence of micropollutants in water and wastewater threatens human health ecological security. Electrocatalytic membrane (EM), a new hybrid treatment platform that integrates separation with electrochemical technologies, has attracted extensive attention the removal from past decade. Here, we systematically review recent advances EM for micropollutant wastewater. mechanisms are first introduced. Afterwards, related materials operating conditions summarized analyzed. Lastly, challenges future prospects research applications also discussed, aiming at more efficient

Language: Английский

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Sunlight-Driven Production of Reactive Oxygen Species from Natural Iron Minerals: Quantum Yield and Wavelength Dependence

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 57(2), P. 1177 - 1185

Published: Dec. 20, 2022

Photochemically generated reactive oxygen species (ROS) play numerous key roles in earth's surface biogeochemical processes and pollutant dynamics. ROS production has historically been linked to the photosensitization of natural organic matter. Here, we report photochemical from three naturally abundant iron minerals. All investigated minerals are photoactive toward sunlight irradiation, with photogenerated currents linearly correlated incident light intensity. Hydroxyl radicals (•OH) hydrogen peroxide (H2O2) identified as major species, apparent quantum yields ranging 1.4 × 10-8 3.9 5.8 2.5 10-6, respectively. Photochemical exhibits high wavelength dependence, for instance, •OH yield decreases increase 375 425 nm, above nm it sharply zero. The temperature shows a positive impact on production, activation energies 8.0 17.8 kJ/mol. Interestingly, impurities exhibit higher than their pure crystal counterparts. Compared photosensitizers, selectivity, lower efficiency, long-term stability production. Our study highlights inorganic mineral photochemistry ubiquitous yet previously overlooked source ROS.

Language: Английский

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