Difference of photodegradation characteristics between single and mixed VOC pollutants under simulated sunlight irradiation

Wang, Zhuang; Xie, Xiaofeng; Wang, Xiao; Mahmood, Asad; Qiu, H.; Sun, Jing

doi:10.1016/j.jphotochem.2019.112029

Cited by 23 publications

(7 citation statements)

References 51 publications

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“…Photocatalysis represents a modern alternative to the traditional routes requiring low energy to operate, safer conditions, and is cost-effective. This method requires the use of photoactive materials and a corresponding light source to generate the super-oxidative species involved in the VOC decomposition [14][15][16]. Its main advantage is complete on-site pollutant mineralization without requiring additional storage equipment.…”

Section: Introductionmentioning

confidence: 99%

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Eneşca

Sisman

2022

Catalysts

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A titania-free heterostructure based on CuS/SnO2/WO3 was obtained by a three-step sol–gel method followed by spray deposition on the glass substrate. The samples exhibit crystalline structures and homogenous composition. The WO3 single-component sample morphology consists of fibers that serve as the substrate for SnO2 development. The CuS/SnO2/WO3 heterostructure is characterized by a dense granular morphology. Photocatalytic activity was evaluated under UV–Vis radiation and indicates that the WO3 single-component sample is able to remove 41.1% of acetaldehyde (64.9 ppm) and 52.5% of formaldehyde (81.4 ppm). However, the CuS/SnO2/WO3 exhibits a superior photocatalytic activity due to a larger light spectrum absorption and lower charge carrier recombination rate, allowing the removal of 69.2% of acetaldehyde and 78.5% of formaldehyde. The reusability tests indicate that the samples have a stable photocatalytic activity after three cycle (12 h/cycle) assessments. During light irradiation, the heterostructure acted as a Z-scheme mechanism using the redox ability of the CuS conduction band electrons and the SnO2/WO3 valence band holes to generate the oxidative species required for VOC removal.

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Section: Introductionmentioning

confidence: 99%

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Eneşca

Sisman

2022

Catalysts

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“…Generally, the TiO 2 ‐based composite photocatalysts were designed following three principles: 1) coupling with photosensitizer to expand the light absorption spectrum of TiO 2 ; 2) visible‐light‐driven (VLD) photocatalysts combining with the inert TiO 2 ; and 3) forming a heterojunction structure to efficiently separate e − /h + at the interface 104–105. [ 116 ]…”

Section: Modified Tio2 For Photocatalytic Oxidation Of Vocsmentioning

confidence: 99%

“…Generally, the TiO 2 -based composite photocatalysts were designed following three principles: 1) coupling with photosensitizer to expand the light absorption spectrum of TiO 2 ; 2) visible-lightdriven (VLD) photocatalysts combining with the inert TiO 2 ; and 3) forming a heterojunction structure to efficiently separate e À /h þ at the interface 104-105. [116] InVO 4 (E g ¼ 2.0 eV) and BiVO 4 (E g ¼ 2.4 eV) with narrower bandgap, energies were coupled with TiO 2 for removing VOCs under visible light irradiation106. A VLD InVO 4 /TiO 2 mesoporous photocatalyst showed high and stable photocatalytic activity toward benzene and the superoxide radical anions such as O 2 •À and OH• were generated on InVO 4 /TiO 2 .…”

Section: Tio 2 Composite Photocatalystsmentioning

confidence: 99%

Recent Developments on Gas‐Phase Volatile Organic Compounds Abatement Based on Photocatalysis

Ren

Deng

et al. 2022

Adv Energy and Sustain Res

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The health and environmental problems caused by volatile organic compounds (VOCs) have attracted wide attention. Photocatalytic technology provides a green and sustainable way for VOCs removal. How to build a highly efficient and stable photocatalyst is of great significance to promote the practical application of photocatalysis technology. In this review, the literatures on photocatalytic oxidation in VOCs are surveyed and systematically categorized based on the types of photocatalytic materials. The methods of improving photocatalytic activity are studied, and the deactivation process of photocatalyst is discussed. Finally, the reaction mechanism is summarized according to the charge separation process and the classification of reactive oxygen species.

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“…High removal percentages are typically obtained under laboratory conditions, e.g. (Papailias et al, 2015;van Walsem et al, 2018van Walsem et al, , 2019Wang et al, 2019). However, realistic atmospheric conditions can greatly reduce photocatalytic degradation, which can be caused by fouling of the photocatalytic surface, and sub-optimal air flow rates and air humidities.…”

Section: Available Local Mitigation Measuresmentioning

confidence: 99%

Application of Improved CFD Modeling for Prediction and Mitigation of Traffic-Related Air Pollution Hotspots in a Realistic Urban Street

Lauriks

Longo

Baetens

et al. 2021

Atmospheric Environment

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The correct prediction of air pollutants dispersed in urban areas is of paramount importance to safety, public health and a sustainable environment. Vehicular traffic is one of the main sources of nitrogen oxides (NO x ) and particulate matter (PM), strongly related to human morbidity and mortality. In this study, the pollutant level and distribution in a section of one of the main road arteries of Antwerp (Belgium, Europe) are analyzed. The assessment is performed through computational fluid dynamics (CFD), acknowledged as a powerful tool to predict and study dispersion phenomena in complex atmospheric environments. The two main traffic lanes are modeled as emitting sources and the surrounding area is explicitly depicted. A Reynolds-averaged Navier-Stokes (RANS) approach specific for Atmospheric Boundary Layer (ABL) simulations is employed. After a validation on a wind tunnel urban canyon test case, the dispersion within the canopy of two relevant urban pollutants, nitrogen dioxide (NO 2 ) and particulate matter with an aerodynamic diameter smaller than 10 µm (PM 10 ), is studied. An experimental field campaign led to the availability of wind velocity and direction data, as well as PM 10 concentrations in some key locations within the urban canyon. To accurately predict the concentration field, a relevant dispersion parameter, the turbulent

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Difference of photodegradation characteristics between single and mixed VOC pollutants under simulated sunlight irradiation

Cited by 23 publications

References 51 publications

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Indoor Air Photocatalytic Decontamination by UV–Vis Activated CuS/SnO2/WO3 Heterostructure

Recent Developments on Gas‐Phase Volatile Organic Compounds Abatement Based on Photocatalysis

Application of Improved CFD Modeling for Prediction and Mitigation of Traffic-Related Air Pollution Hotspots in a Realistic Urban Street

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