Microwave-assisted synthesis of CQDs/ZnO hollow microspheres for complete NO oxidation under visible light

Journal of Environmental Sciences, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Язык: Английский

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Secondary organic aerosol formation from monocyclic aromatic hydrocarbons: insights from laboratory studies

Environmental Science Processes & Impacts, Год журнала: 2022, Номер 24(3), С. 351 - 379

Опубликована: Янв. 1, 2022

This review summarizes in detail the current knowledge chemical compositions, formation mechanisms, and physicochemical properties of secondary organic aerosols formed from monocyclic aromatic hydrocarbons.

Язык: Английский

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A Demonstration of Broadband Cavity-Enhanced Absorption Spectroscopy at Deep-Ultraviolet Wavelengths: Application to Sensitive Real-Time Detection of the Aromatic Pollutants Benzene, Toluene, and Xylene

Analytical Chemistry, Год журнала: 2022, Номер 94(10), С. 4286 - 4293

Опубликована: Март 4, 2022

Benzene, toluene, and xylene (BTX) are serious air pollutants emitted by the chemical industry. Real-time monitoring of these would be a valuable tool to regulate emissions compounds reduce harm they cause human health. Here, we demonstrate first detection BTX using incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS). The instrument was operated in deep-ultraviolet spectral region between 252 286 nm, where aromatic have intense π → π* bands. mirror reflectivity calibrated two methods exceeded 99.63% at 266 nm. At an integration time 60 s, 1σ measurement sensitivities were estimated 7.2 ppbv for benzene, 21.9 10.2 m-xylene, 4.8 p-xylene, respectively. cross sections measured this work with uncertainty 10.0% resolution 0.74 reported good agreement those from earlier studies after accounting differences resolution. To ability quantify complex mixtures, concentrations m-xylene p-xylene been retrieved under five different mixing ratios. Instrumental improvements measurements strategies use applications discussed.

Язык: Английский

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Review of Smog Chamber Experiments for Secondary Organic Aerosol Formation

Atmosphere, Год журнала: 2024, Номер 15(1), С. 115 - 115

Опубликована: Янв. 18, 2024

In this study, we reviewed smog chamber systems and methodologies used in secondary organic aerosol (SOA) formation studies. Many important chambers across the world have been reviewed, including 18 American, 24 European, 8 Asian chambers. The characteristics of (location, reactor size, wall materials, light sources), measurement (popular equipment working principles), (SOA yield calculation wall-loss correction) are summarized. This review discussed key experimental parameters such as surface-to-volume ratio (S/V), temperature, relative humidity, intensity, effect that influence results experiment, how evolved for more accurate simulation atmospheric processes. addition, identifies sources uncertainties finding SOA yields originated from previous intensity installed artificial lights (photolysis rate NO2 varied 0.1/min to 0.40/min), density assumption (varied 1 g/cm3 1.45 g/cm3), management, background contaminants were identified uncertainty. developed studies minimize those also discussed.

Язык: Английский

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Enhancing the photothermal catalytic efficiencies of Hg0 and NO with Bi2O3/TiO2 modified by reduced graphene oxide (rGO)

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(2), С. 112124 - 112124

Опубликована: Фев. 16, 2024

Язык: Английский

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