Use of Natural Rubber Membranes as Support for Powder TiO<sub>2</sub>and Ag/TiO<sub>2</sub>Photocatalysts

Stropa, Jusinei Meireles; Herrero, Aline S.; Cavalheiro, Alberto Adriano; Dantas, Renato F.; Oliveira, Sílvio C. de; Machulek, Amílcar; Oliveira, Lincoln Carlos Silva de

doi:10.5935/0103-5053.20150293

Cited by 3 publications

(2 citation statements)

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“…) with 550 mL reactor volume of 10 ppm dye solution (using the same crystallizing dish with a 15 cm diameter PST film) and 2350 mL solution (∼ four times the reactor volume) in the reservoir is conducted for 6 h. A peristaltic pump (Acuflo‐D150AX, Acuflo, Levin, New Zealand) was used to recirculate the liquid and samples were collected every 30 min. The degradation/decolourisation percentage of RTB was estimated by using the following equation:

Degradation / degradation percentage (%) = [\frac{C_{0} - C}{C_{0}}] \times 100

where C 0 represents the initial concentration of dye at time t = 0; C is the concentration of dye at time t .…”

Section: Materials and Methodologymentioning

confidence: 99%

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Das

Mahalingam

2019

J of Chemical Tech & Biotech

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BACKGROUND: In the last decade, research on floating photocatalysts has increased rapidly with polymer substrates being a popular choice. However, most of the published work is on very small volumes and there is very little work on scale-up of such systems. RESULTS:Polystyrene-titanium dioxide nanocomposite floating films were prepared using a facile solvent casting method and tested for the photocatalytic degradation of four different dyes under UV irradiation. The prepared film was characterised by Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectrometry (ICP-OES) and profilometry. Scale-up studies were done in batch mode under optimised conditions, and for the larger reactor volume, the effect of recirculation was studied. Complete decolourisation of the model dye (Remazol Turquoise Blue) was observed within 80 min in the scaled-up batch process. In the recirculation mode, for a much larger volume of the dye solution, around 75% decolourisation in 6 h was observed. The reusability of the photocatalytic film was tested, and the results promise a minimum decolourisation efficiency of around 70%. Finally, total organic carbon (TOC) and liquid chromatography mass spectrometry (LC-MS) analysis were used to assess the degradation of the dye. The maximum TOC reduction observed was around 25% possibly due to the complex nature of the dye used in this study. The intermediate products of degradation were identified, and a tentative mechanism is suggested. CONCLUSION: This work demonstrates the recirculation aspects of the photocatalytic reactor under the scaled-up conditions for a complex dye. The prepared film showed excellent stability with satisfactory wastewater decontamination under UV irradiation even after repeated use. Figure 5. Effect of catalyst loading and pH. Conditions: 200 mL of 10 ppm Remazol Turquoise Blue (RTB) solution, catalyst loading: 12 wt%.wileyonlinelibrary.com/jctb

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Degradation / degradation percentage (%) = [\frac{C_{0} - C}{C_{0}}] \times 100

where C 0 represents the initial concentration of dye at time t = 0; C is the concentration of dye at time t .…”

Section: Materials and Methodologymentioning

confidence: 99%

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Das

Mahalingam

2019

J of Chemical Tech & Biotech

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“…In recent work, NR/TiO 2 and NR/TiO 2 Ag were used as photocatalysts for dye degradation. 13,14 In the work reported by Stropa and coworkers, the presence of Ag did not show a significant impact on the degradation of MB.…”

Section: Introductionmentioning

confidence: 99%

Application of Low Cost Natural Rubber Films for Water Remediation

Hasanuddin¹,

Chien²,

Abidin³

et al. 2017

JPS

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Adsorption and photocatalytic degradation of cationic dyes over bismuth ferrite (BFO) intercalated on liquid natural rubber-based hydrogel compound

Krishnamoorthy

Mohamed

Kaus

et al. 2022

Journal of Industrial and Engineering Chemistry

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Use of Natural Rubber Membranes as Support for Powder TiO₂and Ag/TiO₂Photocatalysts

Cited by 3 publications

References 1 publication

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Application of Low Cost Natural Rubber Films for Water Remediation

Adsorption and photocatalytic degradation of cationic dyes over bismuth ferrite (BFO) intercalated on liquid natural rubber-based hydrogel compound

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Use of Natural Rubber Membranes as Support for Powder TiO2and Ag/TiO2Photocatalysts

Cited by 3 publications

References 1 publication

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Reusable floating polymer nanocomposite photocatalyst for the efficient treatment of dye wastewaters under scaled‐up conditions in batch and recirculation modes

Application of Low Cost Natural Rubber Films for Water Remediation

Adsorption and photocatalytic degradation of cationic dyes over bismuth ferrite (BFO) intercalated on liquid natural rubber-based hydrogel compound

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Product

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About

Use of Natural Rubber Membranes as Support for Powder TiO₂and Ag/TiO₂Photocatalysts