Fabrication and photocatalytic activity of TiO2 composite membranes via simultaneous electrospinning and electrospraying process

Pahasup-anan, Taddao; Suwannahong, Kowit; Dechapanya, Wipada; Rangkupan, Ratthapol

doi:10.1016/j.jes.2017.11.025

Cited by 33 publications

(12 citation statements)

References 29 publications

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“…The elemental mapping results showed that at 25% TiO 2 , the primary particles tended to agglomerate and form into secondary microclusters with various sizes. A study by Pahasupanan et al also reported a similar observation in a TiO 2 -nylon 6 system [22]. EDX mapping test of the PVL and the PVL-TiO2 films are shown in the ESI R2 file.…”

Section: Resultssupporting

confidence: 65%

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Kaoien

Dechapanya

Khamwichit

et al. 2020

Heliyon

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Photocatalytic oxidation purposes an economical and environmental friendly process to remove benzene from indoor air pollution. However, the process efficiency is primarily dependent on catalytic-film. The main purpose of this study is to synthesize pre-vulcanized latex impregnated with TiO 2 (PVL-TiO 2 thin film) from natural rubber to be used in photo-catalytic oxidation for benzene removal in a reactor. PVL-TiO 2 thin films were synthesized for 3 different dosages of TiO 2 , which were 5%, 15%, and 25% The outcome of this study offers the new application of modified natural rubber in terms of environmental and health care protection. Morphology of the synthesized films was analyzed by SEM. The results showed that TiO 2 particles could be well dispersed all over the surface of the film, in which the best distribution could be found for the PVL-TiO 2 15% thin film. Tensile stress of the films was analyzed using ASTM D412. Results showed that the stress of the films got higher with the increasing amount of TiO 2 content. This indicates that TiO 2 strengthened the PVL-TiO 2 film because the uniformly distribution of TiO 2 on the inner surface increased the strength of the film. The decomposition of PVL and PVL-TiO 2 thin films was analyzed using thermo gravimetric analysis. The maximum weight loss rates in the range of 1.536-1.145 wt %/ C attained at between 380 -382 C TiO 2 particles enhanced thermal stability of PVL-TiO 2 thin films due to the high decomposition temperature of its properties and also acted as barrier for the heat transfer of the films. Specific surface area (SSA) of the films was analyzed using Brunauer-Emmett-Teller. Specific surface area increased as the increasing content of TiO 2 , which corresponded to the morphology analysis by SEM. The analysis of chemical functional group of thin films was performed using ATR-FTIR. The results of Crystal identification using XRD clearly showed good attachment of rutile TiO 2 on the films. Finally, results of absorbance spectrums and band gap energy showed that PVL not only peg TiO 2 particles but also reducing band gap energy which induced by S and ZnO. Therefore, PVL-TiO 2 thin films could be used under visible light condition. The films were then used in the study of benzene removal in annular reactor. The highest removal efficiency (83%)for the PVL-TiO 2 15% thin film was obtained. Comparing to the maximum removal efficiency for PVL film (28%), roughly 60% increase in efficiency was achieved. The PCO kinetics were well fit by a first order Langmuir-Hinshelwood model. The calculation of oxidation rate and percentage of residual intermediates indicated that accumulation of residual intermediates can occur on the active site and the gas phase, resulting in increasing of residual intermediates. The successful synthesis of PVL-TiO 2 thin film provides new opportunity to use natural rubber in terms of environmental and health care protection.

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Section: Resultssupporting

confidence: 65%

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Kaoien

Dechapanya

Khamwichit

et al. 2020

Heliyon

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“…In order to improve the accuracy of degradation tests, a sample of 0.5 mL was taken and diluted five times before UV tests. The degradation data were fitted to a pseudo-first-order kinetic model (eqs and ) to quantify the photocatalytic efficiency: The parameters k and C 0 in eqs and represent the reaction rate constant (min –1 ) and the initial concentration of the pollutant (mg L –1 ), respectively.…”

Section: Experiments Sectionmentioning

confidence: 99%

“…The nanocomposites were obtained via the hydrothermal method using urea as a nitrogen source, whereas the membrane was formed by blending. Pahasup-anan et al 24 prepared a TiO 2 -Nylon-6 photocatalytic composite membrane via electrospinning. Han et al 25 reported that a large amount of TiO 2 particles anchored to the surface of a microporous poly(phenylene sulfide) (PPS) membrane via a facile hydrothermal method.…”

Section: ■ Introductionmentioning

confidence: 99%

The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes

Zhang

Tian

et al. 2021

Langmuir

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The elimination of dye pollutants from wastewater is a significant concern that has prompted extensive research into the development of highly efficient photocatalytic membranes. A novel method was proposed to prepare photocatalysis-enhanced poly(acrylonitrile-methyl acrylate) (PAN-based) membranes in this study. In detail, the blended membrane containing SiO 2 @TiO 2 nanoparticles with a shell−core structure was first prepared via thermal-induced phase separation. The SiO 2 nanoshells were dissolved, and the released TiO 2 nanoparticles migrated to the membrane surface during a simple hydrolysis process, which prevents the TiO 2 nanoparticles from directly contacting or interacting with the polymer matrix. The hydrogen bonds bind the exposed TiO 2 with the PAN membrane surface, resulting in the formation of the TiO 2 @HPAN hybrid membrane. The photocatalytic efficiency of the TiO 2 @HPAN membrane doubled compared with that of nonhydrolyzed membranes. In the presence of UV light, the hybrid membrane can degrade 99.8% of methylene blue solution in less than 2 h, compared to only 86.1% for the blended membranes. Further, the TiO 2 @HPAN membrane showed excellent photocatalytic activity for cationic dyes due to electrostatic attraction. Moreover, the high-flux recovery rate and recycling stability of the TiO 2 @HPAN membrane lead to an excellent antifouling property. The facile preparation method proposed in this work shows extraordinary potential for the development of highly efficient selective photocatalytic materials for cationic dyes to be used in wastewater treatment applications.

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“… 28 The authors of this paper chose titanium dioxide (TiO 2 ) as a photocatalyst due to its abundance, lack of toxicity, low cost, effectiveness, and high chemical stability. 33 Many types of TiO 2 composites with polymers, such as polyethylene, 34 polypropylene, 35 polyvinyl chloride, 36 and nylon-6, 37 have been successfully synthesized; however, after treatment, environmental issues arise. As a result, non-decomposable plastics have been replaced by polylactic acids, which are biodegradable aliphatic polyesters that serve as stationary phases for composite films containing TiO 2 ; these compositions can be used as photocatalysts to test the photocatalytic activity of biodegradable composite films for the removal of VOCs.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Oxidation of PLA/TiO₂-Composite Films for Indoor Air Purification

et al. 2021

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Non-decomposable plastic has been replaced with polylactic acid, which is a biodegradable aliphatic polyester stationary phase, in composite films embedded with a TiO 2 photocatalyst for mitigation of indoor air pollution. PLA has superior properties relative to those of other biopolymers, such as a relatively high melting point, crystallinity, and rigidity. This study aimed to incorporate TiO 2 -anatase into PLA for use as a photocatalyst using the blown film method. Photocatalytic oxidation, an advanced oxidative process, has been recognized as an economical technique providing convenience and efficiency with indoor air treatment. Therefore, the use of new environmentally friendly biodegradable polymers provides an alternative way to address the severe environmental concerns caused by non-decomposable plastics. UV–vis spectrophotometry and scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDX) were used to observe the dispersibility and mixing capacity of the TiO 2 -anatase PLA matrix. TiO 2 dosages were 5, 10, and 15% (wt/wt), and they were incorporated with a twin-screw extruder. SEM–EDX images demonstrated the homogeneity of TiO 2 distribution in the PLA matrix. The energy band gaps of TiO 2 in the PLA/TiO 2 -composite films were between 3.14 and 3.22 eV. The relationship between the photocatalytic oxidation rate and the TiO 2 dosage in the PLA/TiO 2 -composite films was determined. A prototype reactor model is geared toward the development of air purifiers for indoor air conditioning. Rate constants for benzene degradation were obtained using first-order kinetics to find rate constants matching experimental findings. In the PLA/TiO 2 -composite film, the TiO 2 -anatase photocatalyst was able to degrade 5 ppm benzene. This work contributes to the use of ecoefficient photocatalytic oxidation.

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Fabrication and photocatalytic activity of TiO2 composite membranes via simultaneous electrospinning and electrospraying process

Cited by 33 publications

References 29 publications

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes

Photocatalytic Oxidation of PLA/TiO₂-Composite Films for Indoor Air Purification

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Fabrication and photocatalytic activity of TiO2 composite membranes via simultaneous electrospinning and electrospraying process

Cited by 33 publications

References 29 publications

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

Natural rubber modification as a pre-vulcanized latex impregnated with TiO2 for photo-catalytic degradation of gaseous benzene

The Photocatalysis-Enhanced TiO2@HPAN Membrane with High TiO2 Surface Content for Highly Effective Removal of Cationic Dyes

Photocatalytic Oxidation of PLA/TiO2-Composite Films for Indoor Air Purification

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The Photocatalysis-Enhanced TiO₂@HPAN Membrane with High TiO₂ Surface Content for Highly Effective Removal of Cationic Dyes

Photocatalytic Oxidation of PLA/TiO₂-Composite Films for Indoor Air Purification