Control of copper element in mesoporous iron oxide photocatalysts towards UV light-assisted superfast mineralization of isopropyl alcohol with peroxydisulfate

Le, Thao Thi; Lee, Min Wook; Chae, Keun Hwa; Moon, Gun-hee; Kim, Sang Hoon

doi:10.1016/j.cej.2022.139048

Cited by 6 publications

(5 citation statements)

References 61 publications

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“…According to this literature survey, electrospun nanofibers possess at least five advantages, including the following. (1) In contrast to the powder-type photocatalysts in the slurry system, which can be agglomerated during successive utilization, anchoring the photocatalyst on an electrospun mat leads to its stability improvement. , (2) A simple separation of free-standing photocatalyst film as a floating water treatment system facilitates its practical applications. , (3) The large surface area of the electrospun nanofibers promotes the adsorption of the organic pollutants and enhances the photodegradation efficiency. , (4) Functionalization of different chemical groups on polymeric electrospun nanofibers can boost the adsorption ability for water treatment. , (5) One-dimensional photocatalyst nanofibers can facilitate quick charge transfer due to their long axial ratio and enhance electron–hole separation for efficient photocatalytic activity . All of these advantages along with the simple, affordable, and large-scale production ability make the electrospinning method a promising technique for various photocatalytic applications. , …”

Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

“…(1) In contrast to the powder-type photocatalysts in the slurry system, which can be agglomerated during successive utilization, anchoring the photocatalyst on an electrospun mat leads to its stability improvement. 18 , 19 (2) A simple separation of free-standing photocatalyst film as a floating water treatment system facilitates its practical applications. 18 , 20 (3) The large surface area of the electrospun nanofibers promotes the adsorption of the organic pollutants and enhances the photodegradation efficiency.…”

Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

“… 18 , 19 (2) A simple separation of free-standing photocatalyst film as a floating water treatment system facilitates its practical applications. 18 , 20 (3) The large surface area of the electrospun nanofibers promotes the adsorption of the organic pollutants and enhances the photodegradation efficiency. 21 , 22 (4) Functionalization of different chemical groups on polymeric electrospun nanofibers can boost the adsorption ability for water treatment.…”

Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

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Recent Developments of Electrospinning-Based Photocatalysts in Degradation of Organic Pollutants: Principles and Strategies

Samadi

Moshfegh

2022

ACS Omega

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Electrospinning is a simple and cheap process for forming one-dimensional (1D) nanofibers with controllable size, morphology, and chemistry. Besides these, the ultrahigh surface area with industrialization capability has attracted extensive interest in the research community. On the other hand, a photocatalytic process is a promising method for degrading organic pollutants that cannot be removed by conventional wastewater treatment. This review focuses on the recent progress of electrospun nanofibers for the photocatalytic degradation of water pollutants. The linkage between the electrospinning technique and the photocatalytic process is classified into two main categories: (1) polymeric electrospun nanofibers as a sacrificed template to form 1D photocatalysts and (2) polymeric electrospun nanofibers as a carrier of photocatalyst materials. We have thoroughly discussed the principles and fundamental issues of electrospinning as well as two main strategies to design and fabricate nanofiberbased photocatalysts for the ideal photodegradation of organics pollutants. The results of data mapping using VOSviewer demonstrated the recent trend and the importance of this field among researchers and engineers. Moreover, we have elaborated on the limitations and potential benefits of the two categories of electrospinning-based photocatalyst fabrication and practical application that will open new directions for future research.

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Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

Section: Photocatalyst Fabrication By Electrospinningmentioning

confidence: 99%

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Recent Developments of Electrospinning-Based Photocatalysts in Degradation of Organic Pollutants: Principles and Strategies

Samadi

Moshfegh

2022

ACS Omega

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“…A multitude of methods have been investigated for the separation of IPA and water, including adsorption, extractive distillation, biological degradation, pervaporation, oxidation, , and nanofiltration, among others. In instances where varying concentrations of IPA are detected in industrial waste streams, ranging from trace amounts in the parts per billion (ppb) or parts per million (ppm) range to several percentages (%), conventional techniques prove less economically and environmentally viable when applied to lower concentration levels of IPA.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Isopropyl Alcohol Recovery via Data-Driven, Active-Learning Optimization of Vacuum Membrane Distillation

Park,

Cheon,

Park

et al. 2024

ACS Sustainable Chem. Eng.

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The need for separation and recovering solvents from industrial byproducts is critical, given their environmental and economic impact. This study explores the feasibility of energyefficient vacuum membrane distillation (VMD) using polypropylene hollow fiber membranes to recover and reuse isopropyl alcohol (IPA) from wastewater. Notably, this study pioneers the utilization of active learning-based Bayesian optimization (BO) to optimize the complex, multiobjective, and constrained VMD process. BO is an effective method for global optimization in black-box functions, particularly when data is limited and difficult to acquire. It creates a data-driven surrogate model (e.g., Gaussian process model) due to the shortage of data and the need for uncertainty quantification. The data-driven approach by BO efficiently reduces the number of necessary experiments, demonstrating the value of active learning in sustainable chemical processes. The research focuses on the data-driven optimization of key process variables in VMD required in scale-up operation, including the feed solution temperature, lumen-side membrane pressure, solution flow rate, and IPA concentration. To assess the long-term viability of the optimal conditions identified by BO, particularly given the risk of membrane pore wetting, we also evaluate the long-term stability of the optimized process. This study bridges the gap between fundamental research and practical application, offering a robust foundation for using advanced optimization techniques in the separations field. It holds promise for broad industrial applicability, providing both environmental and economic benefits.

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“…Moreover, the electrostatic spinning technology has been considered as a versatile technology capable of adjusting the composition, diameter, and orientation of materials according to the intended function and application [23], which is employed extensively in the fabrication of metal oxides (TiO 2 , ZnO, Fe 2 O 3 , WO 3 , etc.) nanofibers for photocatalytic degradation of pollutants [24], hydrogen production [25], and CO 2 reduction [26], etc.…”

Section: Introductionmentioning

confidence: 99%

Boosted Photocatalytic Performance for Antibiotics Removal with Ag/PW12/TiO2 Composite: Degradation Pathways and Toxicity Assessment

Shi,

Wang,

Zhang

et al. 2023

Molecules

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Photocatalyst is the core of photocatalysis and directly determines photocatalytic performance. However, low quantum efficiency and low utilization of solar energy are important technical problems in the application of photocatalysis. In this work, a series of polyoxometalates (POMs) [H3PW12O40] (PW12)-doped titanium dioxide (TiO2) nanofibers modified with various amount of silver (Ag) nanoparticles (NPs) were prepared by utilizing electrospinning/photoreduction strategy, and were labelled as x wt% Ag/PW12/TiO2 (abbr. x% Ag/PT, x = 5, 10, and 15, respectively). The as-prepared materials were characterized with a series of techniques and exhibited remarkable catalytic activities for visible-light degradation tetracycline (TC), enrofloxacin (ENR), and methyl orange (MO). Particularly, the 10% Ag/PT catalyst with a specific surface area of 155.09 m2/g and an average aperture of 4.61 nm possessed the optimal photodegradation performance, with efficiencies reaching 78.19% for TC, 93.65% for ENR, and 99.29% for MO, which were significantly higher than those of PW12-free Ag/TiO2 and PT nanofibers. Additionally, various parameters (the pH of the solution, catalyst usage, and TC concentration) influencing the degradation process were investigated in detail. The optimal conditions are as follows: catalyst usage: 20 mg; TC: 20 mL of 20 ppm; pH = 7. Furthermore, the photodegradation intermediates and pathways were demonstrated by HPLC-MS measurement. We also investigated the toxicity of products generated during TC removal by employing quantitative structure-activity relationship (QSAR) prediction through a toxicity estimation software tool (T.E.S.T. Version 5.1.2.). The mechanism study showed that the doping of PW12 and the modification of Ag NPs on TiO2 broadened the visible-light absorption, accelerating the effective separation of photogenerated carriers, therefore resulting in an enhanced photocatalytic performance. The research provided some new thoughts for exploiting efficient and durable photocatalysts for environmental remediation.

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Control of copper element in mesoporous iron oxide photocatalysts towards UV light-assisted superfast mineralization of isopropyl alcohol with peroxydisulfate

Cited by 6 publications

References 61 publications

Recent Developments of Electrospinning-Based Photocatalysts in Degradation of Organic Pollutants: Principles and Strategies

Recent Developments of Electrospinning-Based Photocatalysts in Degradation of Organic Pollutants: Principles and Strategies

Sustainable Isopropyl Alcohol Recovery via Data-Driven, Active-Learning Optimization of Vacuum Membrane Distillation

Boosted Photocatalytic Performance for Antibiotics Removal with Ag/PW12/TiO2 Composite: Degradation Pathways and Toxicity Assessment

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