Continuous photocatalytic reactor: Critical review on the design and performance

Binjhade, Rahul; Mondal, Mrinmoy; Mondal, Sourav

doi:10.1016/j.jece.2022.107746

Cited by 46 publications

(22 citation statements)

References 192 publications

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“…From many points of view, the continuous system would offer the advantages of scalability, reaction monitoring, and efficiency. However, the operating cost and efficient photocatalysts were still challenges for industrial settings [72] . With similarity to the effects of light intensity, until now, a few studies have been exploring the influence of reactor geometry on the formation of H 2 O 2 .…”

Section: Quantification Of Photocatalytic Efficiencymentioning

confidence: 99%

“…However, the operating cost and efficient photocatalysts were still challenges for industrial settings. [72] With similarity to the effects of light intensity, until now, a few studies have been exploring the influence of reactor geometry on the formation of H 2 O 2 . The design of reactors for photocatalysis could decide the efficiency of mass transporta-tion, which entails the economic feasibility of the large scale.…”

Section: Effects Of Light Intensity and Reactorsmentioning

confidence: 99%

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Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

et al. 2023

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Hydrogen peroxide (H 2 O 2 ) can be considered as one of the world's indispensable chemicals. However, the synthetic process can prompt several severe environmental and human health issues. However, solar H 2 O 2 production may provide opportunities to mitigate such issues. Graphitic carbon nitride (g-C 3 N 4 ) has emerged as one promising material for photocatalytic applications due to its unique properties. Although tremendous efforts in engineering g-C 3 N 4 have been proposed to improve catalytic results, the materials obtained still have some issues.Additionally, the mechanisms behind the production of H 2 O 2 by using such materials are not yet fully understood. Herein, we conducted a literature survey reviewing the production of H 2 O 2 using g-C 3 N 4 -based materials. The essential aspects of and current challenges in photocatalytic H 2 O 2 generation are discussed, which may provide insight for researchers to overcome barriers and develop sustainable methods for H 2 O 2 production.

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Section: Quantification Of Photocatalytic Efficiencymentioning

confidence: 99%

Section: Effects Of Light Intensity and Reactorsmentioning

confidence: 99%

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

et al. 2023

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“…However, to enhance the process throughput, there is a trend towards replacement of batch reactors with flow reactors. [31] The attempts to made continuous flow photochemistry is inseparably linked to a higher level of technology than commonly used batch experiments on lab scale. In the present work a custom-designed continuous scale reactor (Figure 5a) was used to process larger volume of organic pollutants in the presence of electrochemically synthesized ZnO nanopowder.…”

Section: Photocatalytic Degradation Of Methylene Blue and 24-dinitrop...mentioning

confidence: 99%

Photo(electro)catalytic Performance of ZnO‐Based Nanopowders Prepared through Pulse Alternating Current Electrosynthesis in Alkaline Earth Chloride Electrolytes

Ulyankina,

Tsarenko,

Yatsenko

et al. 2023

ChemistrySelect

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Photo(electro)catalysis is a technology that allows abundant and clean solar energy to be harvested as an essential step to achieving sustainable development goals. However, controllable and economically viable synthesis of nanocatalysts is one of the key challenges that hinder the practical application of many important energy‐related photo(electro)catalytic reactions. In this study insights into the electrosynthesis of ZnO‐based materials using pulse alternating current as a green oxidant and the alkaline earth metal chloride aqueous solutions as electrolytes were provided. The effect of electrolyte on composition and structure of final products was demonstrated. ZnO photocatalyst prepared in BaCl2 exhibited different activity tendency in photoelectrocatalytic and photocatalytic systems showing the highest photocurrent (0.18 mA cm−2) for ZnO photoelectrode annealed at 300 °C and maximum rate constant for methylene blue dye photodegradation in the presence of ZnO particles annealed at 500 °C. Optimized ZnO nanopowder was further employed for the degradation of 2,4‐dinitrophenol pollutant in a custom‐designed flow photoreactor operating under low‐power UV. 2,4‐dinitrophenol was degraded to 90.1 % at ZnO dosage of 0.2 mg L−1 within 280 min of illumination. Overall, the optimization of pulse alternating current electrosynthesis and post‐annealing might be promising and sustainable approach to ZnO‐based nanopowders for environmental photo(electro)catalytic applications.

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“…Harvesting the UV or visible light of solar energy, using some suitable photocatalyst for the complete decomposition of dye components to CO 2 is challenging but a beneficial process [22–24] . Different types of photocatalysts that can capture the UV‐vis light have been designed for the photochemical decomposition of dye [25–34] . To the best of our knowledge Cu or Fe‐based catalyst abstracted from metal‐based waste are very limited.…”

Section: Introductionmentioning

confidence: 99%

“…[22][23][24] Different types of photocatalysts that can capture the UV-vis light have been designed for the photochemical decomposition of dye. [25][26][27][28][29][30][31][32][33][34] To the best of our knowledge Cu or Fe-based catalyst abstracted from metalbased waste are very limited. Therefore, this present work attempts a new synthetic approach towards the design of CuO or Fe 3 O 4 photocatalyst from E-waste and Fe-rust deposited on filter candles for the photochemical decomposition of various dye components.…”

Section: Introductionmentioning

confidence: 99%

Iron and Copper Catalysts Derived from Inorganic Waste for Dye Degradation

et al. 2023

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Dyes like methyl violet (MV) and methyl orange (MO) released from textile industries are considered to be water pollutants. Likewise metal waste from electronic devices and from metallurgical industries are causing harmful effects. Therefore, looking into the negative impact of such waste materials herein copper oxide (CuO) and iron oxide (Fe 3 O 4 ) photocatalysts were prepared from electronic and candle waste, respectively materials. The metal oxides were supported on a graphitic carbon matrix obtained from waste tea leaves. The synthesized materials were well characterized using different analytical techniques. The carbon-supported CuO and Fe 3 O 4 catalysts exhibited good photocatalytic activity under UV-light irradiation in the photo-degradation of coloured dyes like methyl orange (MO) and methyl violet (MV). The copper (Cu)-catalyst with band gap like that of titanium dioxide (TiO 2 ) showed superior activity over the iron (Fe)-catalyst under identical conditions. Cu-catalyst was found to degrade the dyes within 10-15 min while it took longer time with Fe-catalyst up to 50 min. The measure of total organic content (TOC) after the dye-degradation study implied that Cu-catalyst can carbonize MV upto 89.6 % within 15 min while the same was found to be less (79.5 %) for MO. The ability of the synthesized photocatalysts from waste materials in dye degradation was monitored through FTIR analysis. The mechanistic study suggested the involvement of both the holes and free radicals in the photooxidation of dye components.

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Continuous photocatalytic reactor: Critical review on the design and performance

Cited by 46 publications

References 192 publications

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

Photo(electro)catalytic Performance of ZnO‐Based Nanopowders Prepared through Pulse Alternating Current Electrosynthesis in Alkaline Earth Chloride Electrolytes

Iron and Copper Catalysts Derived from Inorganic Waste for Dye Degradation

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Continuous photocatalytic reactor: Critical review on the design and performance

Cited by 46 publications

References 192 publications

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H2O2

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H2O2

Photo(electro)catalytic Performance of ZnO‐Based Nanopowders Prepared through Pulse Alternating Current Electrosynthesis in Alkaline Earth Chloride Electrolytes

Iron and Copper Catalysts Derived from Inorganic Waste for Dye Degradation

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Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂

Graphitic Carbon Nitride Based Materials Towards Photoproduction of H₂O₂