Application of novel copolymer-TiO2 membranes for some textile dyes adsorptive removal from aqueous solution and photocatalytic decolorization

Essawy, Amr A.; Ali, Amr El‐Hag; Abdel‐Mottaleb, M. S. A.

doi:10.1016/j.jhazmat.2008.01.072

Cited by 81 publications

(31 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methyl orange (MO) was applied as a model in order to test the photocatalytic activity of the provided membrane and it was found that that the nanovoid layer between TiO 2 particle and PVDF material under UV irradiation could successfully release all the active sites of TiO 2 particles and improve the mass transfer and photocatalytic activity. Essawy et al [137] a membrane prepared by polyethylene-grafted-poly (4- [140] where they reported that some amino groups could be removed without altering the whole structure of chitosan only by assembling a bilayer TiO 2 -CS-glass system in aqueous solution using a compact household fluorescent lamp. The applied photocatalytic-oxidation process caused a visual color alteration to strong brown.…”

Section: Tio 2 Photocatalysis In Waste Water Treatmentmentioning

confidence: 99%

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Bet-Moushoul

Mansourpanah

Farhadi

et al. 2016

Chemical Engineering Journal

332

127

View full text Add to dashboard Cite

Section: Tio 2 Photocatalysis In Waste Water Treatmentmentioning

confidence: 99%

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Bet-Moushoul

Mansourpanah

Farhadi

et al. 2016

Chemical Engineering Journal

332

127

View full text Add to dashboard Cite

“…This hypothesis is supported by the observation that the photocatalytic films regained the original white color at the end of the decolorization process. Similarly, Essawy et al [16] reported the use of TiO 2 supported over polyethylene-grafted-poly(4-vinylpyridine-co-acrylamide) (LDPE-g-P(4-VP/AAm)) films that managed to completely absorb the textile azo dye solutions. Nevertheless, the reusability of the film was not discussed.…”

Section: Effect Of the Repeated Usage Of 04 G P(3hb)-40 Wt% Tio 2 Fimentioning

confidence: 99%

“…At a higher pH, i.e., 9.5, the decolorization efficiency decreases as the concentration of OH -ions increases. This may be caused by the competitive uptake of OH -ions and dye molecules on the surface of the photocatalytic film [16]. Thus, the availability of surface active sites on P(3HB)-40 wt% TiO 2 film for the attachment of dye molecules is important in determining the rate of decolorization.…”

Section: Effect Of Different Ph Of Batik Dye Wastewater On the Decolomentioning

confidence: 99%

Solar Photocatalytic Decolorization and Detoxification of Industrial Batik Dye Wastewater Using P(3HB)‐TiO₂ Nanocomposite Films

Sridewi

Tan

Sudesh

2011

CLEAN Soil Air Water

View full text Add to dashboard Cite

Solar photocatalytic decolorization and detoxification of batik dye wastewater using titanium dioxide (TiO 2 ) immobilized on poly-3-hydroxybutyrate (P(3HB)) film was studied. The effects of initial dye concentration, catalyst concentration, P(3HB) film thickness, and fabrication methods of the nanocomposite films were evaluated against methylene blue, a standard organic dye. It was observed that 0.4 g of P(3HB)-40 wt% TiO 2 removed 96% of the color under solar irradiation. P(3HB) and TiO 2 , mixed concurrently in chloroform followed by stirring for 24 h showed a more even distribution of the photocatalyst on the polymer surface and yielded almost 100% color removal. The photocatalytic films were able to completely decolorize real industrial batik dye wastewater in 3 h and induced a chemical oxygen demand (COD) reduction of 80%. Reusability of the 0.4 g P(3HB)-40 wt% TiO 2 film in decolorizing the batik dye wastewater was also possible as it gave a high consistent value of decolorization percentage (>80%) even after the sixth repeated usage. Recovery step of the photocatalysts was also not required in this simple treatment system. The decolorized batik dye wastewater had less/no toxic effects on mosquito larvae, Aedes aegypti, and microalgae, Scenedesmus quadricauda indicating simultaneous detoxification process along with the decolorization process.

show abstract

“…TiO 2 nanoparticles have been attached on polymers from colloidal suspensions, dip coating, phosphonate coupling, chemical reduction, emulsion polymerization and spreading [14][15][16][17][18][19][20]. [26,27].…”

Section: Introductionmentioning

confidence: 99%

Preparation, kinetics, mechanism and properties of semi-transparent photocatalytic stable films active in dye degradation

Suárez

Pulgarín

Roussel

et al. 2016

Applied Catalysis A: General

View full text Add to dashboard Cite

b s t r a c tThe photocatalytic activity, mechanism and characterization of polyethylene-TiO 2 films (PE-TiO 2 ) during the discoloration/degradation of methylene blue (MB) are reported in this study. PE-TiO 2 films were prepared at moderate temperatures (∼90 • C). TiO 2 did not leach out during discoloration/degradation of MB. This is a significant finding for a low temperature catalyst-polymer preparation leading to a stable repetitive MB degradation kinetics. MB discoloration on PE-TiO 2 films proceeded showing a quantum yield of 0.25%. Band-gap irradiation of TiO 2 was applied by way of a mercury medium pressure lamp to excite only TiO 2 and avoid MB photosensitization. The nature of the oxidative radicals intervening in MB discoloration was investigated by scavenging experiments. The relative importance of the oxidative species during MB discoloration is: TiO 2 vbh + > HO 2Evidence is presented for the superoxide anion-radical O 2• − at pH 6, as the main radical species leading to MB-discoloration. The MB-discoloration kinetic trend on PE-TiO 2 followed the behavior observed for diffusion-controlled reactions. The diffusion distance of the HO 2 • and OH • radicals during the discoloration of a solution MB 1 × 10were estimated as 71 and 2.2 m respectively. The OH • formation was assessed quantitatively during MB degradation by fluorescence measurements. The PE-TiO 2 film at time zero presented a contact angle (CA) of ∼92• , decreasing within the five hour MB discoloration period to <5• . Reversibility from the hydrophilic nature of the film to the initial hydrophobic state proceeded in the dark within few days. The implications of the reversibility time on the MB-discoloration performance are discussed. Evidence for redox catalysis during MB-discoloration was found by XPS measurements. The surface properties of the (PE-TiO 2 ) films were characterized by X-ray fluorescence (XRF), UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma mass-spectrometry (ICP-MS).

show abstract

Application of novel copolymer-TiO2 membranes for some textile dyes adsorptive removal from aqueous solution and photocatalytic decolorization

Cited by 81 publications

References 32 publications

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Solar Photocatalytic Decolorization and Detoxification of Industrial Batik Dye Wastewater Using P(3HB)‐TiO₂ Nanocomposite Films

Preparation, kinetics, mechanism and properties of semi-transparent photocatalytic stable films active in dye degradation

Contact Info

Product

Resources

About

Application of novel copolymer-TiO2 membranes for some textile dyes adsorptive removal from aqueous solution and photocatalytic decolorization

Cited by 81 publications

References 32 publications

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

TiO2 nanocomposite based polymeric membranes: A review on performance improvement for various applications in chemical engineering processes

Solar Photocatalytic Decolorization and Detoxification of Industrial Batik Dye Wastewater Using P(3HB)‐TiO2 Nanocomposite Films

Preparation, kinetics, mechanism and properties of semi-transparent photocatalytic stable films active in dye degradation

Contact Info

Product

Resources

About

Solar Photocatalytic Decolorization and Detoxification of Industrial Batik Dye Wastewater Using P(3HB)‐TiO₂ Nanocomposite Films