Development and Optimization of an Immobilized Photocatalytic System within a Stacked Frame Photoreactor (SFPR) Using Light Distribution and Fluid Mixing Simulation Coupled with Experimental Validation

Boyle, Con; Skillen, Nathan; Stella, Lorenzo; Robertson, Peter K. J.

doi:10.1021/acs.iecr.8b05709

Cited by 8 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This presents mass transport limitations as reagents must diffuse to the channel surface to react, making the channel surface-to-volume ratio a limiting factor for the productivity [213]. Second-generation coated reactors combat this issue by employing static mixers as the HPCat substrate to generate a turbulent flow and to enhance the mass transport within the channels [214][215][216][217]. There are limitations as the HPCat and reactor device must have compatible functional groups to be deposited or immobilised and must be compatible with the intended reaction system's solvents and reagents.…”

Section: Flow Reactors For Heterogeneous Photocatalystsmentioning

confidence: 99%

Heterogeneous photocatalysis in flow chemical reactors

Thomson

Lee

Vilela

2020

Beilstein J. Org. Chem.

View full text Add to dashboard Cite

The synergy between photocatalysis and continuous flow chemical reactors has shifted the paradigms of photochemistry, opening new avenues of research with safer and scalable processes that can be readily implemented in academia and industry. Current state-of-the-art photocatalysts are homogeneous transition metal complexes that have favourable photophysical properties, wide electrochemical redox potentials, and photostability. However, these photocatalysts present serious drawbacks, such as toxicity, limited availability, and the overall cost of rare transition metal elements. This reduces their long-term viability, especially at an industrial scale. Heterogeneous photocatalysts (HPCats) are an attractive alternative, as the requirement for the separation and purification is largely removed, but typically at the cost of efficiency. Flow chemical reactors can, to a large extent, mitigate the loss in efficiency through reactor designs that enhance mass transport and irradiation. Herein, we review some important developments of heterogeneous photocatalytic materials and their application in flow reactors for sustainable organic synthesis. Further, the application of continuous flow heterogeneous photocatalysis in environmental remediation is briefly discussed to present some interesting reactor designs that could be implemented to enhance organic synthesis.

show abstract

Section: Flow Reactors For Heterogeneous Photocatalystsmentioning

confidence: 99%

Heterogeneous photocatalysis in flow chemical reactors

Thomson

Lee

Vilela

2020

Beilstein J. Org. Chem.

View full text Add to dashboard Cite

show abstract

“…A study which used coumarin to trap OH • radicals generated by γ-ray irradiation determined that 6.1% of products formed were 7-hydroxycoumarin . This value has subsequently also been adopted in photocatalytic studies using coumarin as an indirect method for determining yields of OH • . − …”

Section: Introductionmentioning

confidence: 99%

“… 23 This value has subsequently also been adopted in photocatalytic studies using coumarin as an indirect method for determining yields of OH • . 24 − 26 …”

Section: Introductionmentioning

confidence: 99%

Enhanced Monitoring of Photocatalytic Reactive Oxygen Species: Using Electrochemistry for Rapid Sensing of Hydroxyl Radicals Formed during the Degradation of Coumarin

McCormick

Rice

McCrudden³

et al. 2023

J. Phys. Chem. A

Self Cite

View full text Add to dashboard Cite

Many recent research studies have reported indirect methods for the detection and quantification of OH radicals generated during photocatalysis. The short lifespan and high reactivity of these radicals make indirect detection using probes such as coumarin a more viable quantification method. Hydroxyl radical production is commonly monitored using fluorescence spectroscopy to determine the concentration of the compound 7hydroxycoumarin, which is formed from hydroxyl radical attack on coumarin. There are, however, a number of additional hydroxylated coumarins generated during this process, which are less amenable to detection by fluorescence spectroscopy. Consequently, limitations and inaccuracies of this method have previously been reported in the literature. As an alternative approach to those previously reported, this work has developed an electrochemical screening method using coumarin as a OH radical trap, that is capable of in situ monitoring of not only 7-hydroxycoumarin, but all the main mono-hydroxylated products formed. As a result, this technique is a more representative and comprehensive method for the quantification of OH radicals produced by photocatalysts using coumarin as a probe molecule. Moreover, the electroanalytical method provides a portable, rapid, sensitive, and accurate in situ method for the monitoring of OH radical formation without the need for sample preparation.

show abstract

“…Since then, a wide variety of products emerged on the market for indoor formaldehyde cleaning as well as for building facade applications. However, the dramatic increase in vehicle emissions in cities is seriously polluting air quality and is gradually attracting the attention of road engineering researchers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Study on Air-Purifying Performance of Semi-Flexible Asphalt Samples Coated with Titanium Dioxide Using Different Methods

Yan¹,

Wang²,

Chi³

et al. 2022

Journal of Renewable Materials

View full text Add to dashboard Cite

Titanium dioxide (TiO 2 ) was recently employed to apply onto road surfaces to degrade the harmful compounds from vehicle emissions. However, it remains a challenging task to find a highly compatible pavement type for TiO 2 application to achieve durable and efficient air-purifying performance. This study proposed to coat TiO 2 particles onto semi-flexible pavement surface and tried to investigate an optimum coating method. Three coating methods, including direct mixing TiO 2 (MT) with asphalt mixture, spraying dry TiO 2 (ST) coating and watersolution-based TiO 2 (WT) coating on semi-flexible pavement surface. To achieve this objective, semi-flexible samples were prepared to evaluate and compare the performances of three coating methods by employing resistance to wearing, NO removal efficiency tests and residual texture depth tests. It was found that the ST method not only provided better NO degrading efficiency but also improved the resistance to wearing than the other two methods.

show abstract

Development and Optimization of an Immobilized Photocatalytic System within a Stacked Frame Photoreactor (SFPR) Using Light Distribution and Fluid Mixing Simulation Coupled with Experimental Validation

Abstract: , P. (2019). The development and optimisation of an immobilised photocatalytic system within a Stacked Frame Photo Reactor (SFPR) using light distribution and fluid mixing simulation coupled with experimental validation.

Cited by 8 publications

References 39 publications

Heterogeneous photocatalysis in flow chemical reactors

Heterogeneous photocatalysis in flow chemical reactors

Enhanced Monitoring of Photocatalytic Reactive Oxygen Species: Using Electrochemistry for Rapid Sensing of Hydroxyl Radicals Formed during the Degradation of Coumarin

Study on Air-Purifying Performance of Semi-Flexible Asphalt Samples Coated with Titanium Dioxide Using Different Methods

Contact Info

Product

Resources

About