Anodized titania nanotube array microfluidic device for photocatalytic application: Experiment and simulation

Jayamohan, Harikrishnan; Smith, York R.; Hansen, Lauryn C.; Mohanty, Swomitra K.; Gale, Bruce K.; Misra, M.

doi:10.1016/j.apcatb.2015.02.041

Cited by 20 publications

(43 citation statements)

References 57 publications

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“…A set of experimental data was obtained in different RB concentration and investigated the kinetic scheme (Jayamohan et al . ). In generally, for PW 12 reaction system, the adopted mechanism for the photocatalysis of the majority of organic compounds is the Langmuir–Hinshelwood (L–H) mechanism (Kim & Hong ), Wang et al .…”

Section: Resultsmentioning

confidence: 97%

“…A set of Water and Environment Journal V C 2018 CIWEM. 32 (2018) 585-596 experimental data was obtained in different RB concentration and investigated the kinetic scheme (Jayamohan et al 2015). In generally, for PW 12 reaction system, the adopted mechanism for the photocatalysis of the majority of organic compounds is the Langmuir-Hinshelwood (L-H) mechanism (Kim & Hong 2002), Wang et al (2014) also prove experimentally that reaction system will follow the L-H mechanism.…”

Section: Kinetics Studiesmentioning

confidence: 97%

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Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan

Wan

Wang

et al. 2018

Water & Environment J

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Increasing environmental pollution caused by toxic dyes due to their hazardous nature is a matter of great concern, and lacks the effective methods to remove them. Therefore, in this research a series of H3O40PW12/Quaternized chitosan (PWX%/QCS) membrane catalyst is synthesized based on QCS (positively charged) and keggin‐type H3O40PW12 (negatively charged), which is available to degrade rhodamine B. The optimum experimental conditions are investigated and results reveal that the degradation rate is over 92.1% and the chemical oxygen demand (COD) decreases is 78.09%, which is obtained based on the follow conditions is that the UV radiation is 90 min, the dose of membrane catalyst is 0.1g, the doping amount PW12 (H3O40PW12) is 35 wt%, RB aqueous solution (30mL) is 5mg/L, the reaction temperature is 30°C, pH = 5 and H2O2 is 20mM. The simulation result reveals that the photocatalytic degradation reaction of RB with PWX%/QCS membrane catalyst in an aqueous solution can be described by the Langmuir–Hinshelwood equation. And the initiation rate constant and the initiation adsorption constant in this case are 4.082mg/(L/min) and 0.01090L/mg, respectively.

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Section: Resultsmentioning

confidence: 97%

Section: Kinetics Studiesmentioning

confidence: 97%

Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan

Wan

Wang

et al. 2018

Water & Environment J

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“…Apesar dos progressos na fotocatálise, as tecnologias atuais de decomposição da água ainda apresentam baixa eficiência. Muitos estudos envolvem os reatores convencionais de macroescala que apresentam limitações no transporte de massa e de fótons, e os microrreatores aparecem como ferramentas adequadas para reações fotocatalíticas devido a suas características (AHMAD et al, 2015;CASTEDO et al, 2017;CHEN et al, 2015;JAYAMOHAN et al, 2015).…”

Section: Introductionunclassified

“…Reatores de microcanais, dispositivos muitas vezes chamados também de microrreatores ou reatores microestruturados, são dispositivos microfluídicos com diâmetro ou altura na faixa de 10-100 µm, sendo que a alta área interfacial específica leva a uma maior transferência de calor e massa. Além disso, apresentam maior homogeneidade na iluminação Revista Brasileira de Energias Renováveis, v.7, n.3, p. 319-327, 2018 espacial e melhor penetração da luz através de toda profundidade do reator em comparação aos reatores de larga escala (CASTEDO et al, 2017;CORBEL et al, 2014;ESKANDARLOO et al, 2015;JAYAMOHAN et al, 2015;MATSUSHITA et al, 2008).…”

Section: Introductionunclassified

Modelagem Da Produção Fotocatalítica De Hidrogênio Em Reator De Microcanais

Fukuda

Nascimento²,

Souza³

et al. 2018

R. bras. Ener. Renov.

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RESUMOA decomposição fotocatalítica da água é um método promissor para converter energia solar em hidrogênio. Microrreatores têm demonstrado maior eficiência fotocatalítica comparada com reatores convencionais. Neste trabalho foi realizada a modelagem de um reator de microcanais para a produção fotocatalítica de hidrogênio. Com o ajuste do modelo aos dados experimentais foi obtido que a ordem da irradiância é próxima a 0,5, indicando que o sistema modelado foi iluminado com alta irradiância. Os valores obtidos pelo modelo para a simulação de cinco vazões diferentes ficaram próximos dos valores obtidos experimentalmente. ABSTRACTThe photocatalytic water splitting is a promising method for conversion of solar energy into hydrogen. Microreactors have showed higher photocatalytic efficiency compared to conventional reactors. In this work, it was performed the modeling of a microchannel reactor for photocatalytic production of hydrogen. The model fitting to the experimental data resulted in a light intensity order close to 0.5, indicating that the system was illuminated with high light intensity. The obtained values through the model for simulation of five different flow rates were close to the experimental data.

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“…Recently, a polymer called polydimethylsiloxane (PDMS) has been implemented in many microfluidic devices for a wide range of applications, due to its interesting physical and chemical properties, such as elasticity, optical transparency, flexible surface, high dielectric properties and low cost [27][28][29]. Moreover, the integration of TiO2 nanostructures with PDMS for photocatalytic devices has increased in the last few years, attempting to reduce these nanostructures disposal on the environmental [30,31]. These attempts to reduce nanostructure disposal are important, mainly for TiO2 NP and SiO2 NP, since they are certainly the most relevant materials in terms of worldwide production volume.…”

Section: Introductionmentioning

confidence: 99%

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Bonelli

Pereyra

2018

JICS

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Nitrided TiO2 nanotubes and PDMS microchannel were assembled in a photocatalytic device for organic dyes photo-degradation studies. By integrating a PDMS microchannel with the nitrided TiO2 nanotubes array, a microfluidic photocatalytic device was obtained and characterized by morphological, chemical, and physical points of view. The fabrication process allows an easy integration of the obtained nitrided TiO2 nanotubes with a microchannel into a microfluidic device for pollutant photo-degradation. The high surface-to-volume ratio intrinsic of nanotubes structures has functional properties for harvesting light and is responsible for part of the interesting photocatalytic device performance. Another great advantage of nitrided TiO2 nanotubes compared to just TiO2 nanotubes, is the lower gap of 2.80 eV achieved by plasma nitriding processes in PECVD reactor, which leads to a 14% increase in the photocatalytic response to sun light. As a consequence, the methylene blue reduction efficiency of the microfluidic device fabricated with nitrided TiO2 nanotubes increased 13% compared to that with just anodized TiO2 nanotubes.

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Anodized titania nanotube array microfluidic device for photocatalytic application: Experiment and simulation

Cited by 20 publications

References 57 publications

Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan

Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan

Modelagem Da Produção Fotocatalítica De Hidrogênio Em Reator De Microcanais

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

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Anodized titania nanotube array microfluidic device for photocatalytic application: Experiment and simulation

Cited by 20 publications

References 57 publications

Photocatalytic degradation of rhodamine B based on membrane catalyst of H3O40PW12/quaternized chitosan

Photocatalytic degradation of rhodamine B based on membrane catalyst of H3O40PW12/quaternized chitosan

Modelagem Da Produção Fotocatalítica De Hidrogênio Em Reator De Microcanais

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

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Product

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Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan

Photocatalytic degradation of rhodamine B based on membrane catalyst of H₃O₄₀PW₁₂/quaternized chitosan