Electrochemical degradation of Acid Blue 113 dye using TiO 2 -nanotubes decorated with PbO 2 as anode

Moura, Dayanne Chianca de; Quiróz, Marco A.; Silva, Djalma Ribeiro da; Salazar, Ricardo; Martínez‐Huitle, Carlos A.

doi:10.1016/j.enmm.2015.11.001

Cited by 34 publications

(17 citation statements)

References 39 publications

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“…Some reported works showed only 70% conversion of RB-5 dye by using photoassisted Fenton, which is lower than the values reported here [47]. This revealed that the • OH radical is weakly adsorbed over the surface of nonactive electrode (PbO 2 ) [8] and ultimately favors the production of • OH radical as indicated in Eq. (1) and also subsequent adsorption of the dye molecules over the active sites provided by positively charged TiNS under acidic conditions over the PbO 2 /RVC substrate.…”

Section: Electrochemical Decolourisation and Colour Removal Of Rb-5 Dyecontrasting

confidence: 69%

“…Platinum is as an active anode, as it is capable of attracting hydroxyl radicals over its surface, due to its greater adsorption enthalpy. In the case of non-active electrodes like PbO 2 , there is weak interaction of the electrodes with hydroxyl ( • OH) radicals which are more prone to react in the electrolyte and oxidise organic compounds dissolved in solution [8].…”

Section: Electrochemical Studies Of the Coatingsmentioning

confidence: 99%

“…Metal oxide electrode material plays an important role during the anodic oxidation reaction, since both chemical reactivity and ability to electrogenerate M( • OH) are related to the nature of the electrode. Different anode materials have been investigated to observe the stability and efficiency in batch as well as flow studies [8][9][10][11]. The anode materials should be selected on their high over potential for the oxygen evolution reaction (OER) as well as for their large surface area.…”

Section: Introductionmentioning

confidence: 99%

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Decolourisation of reactive black-5 at an RVC substrate decorated with PbO2/TiO2 nanosheets prepared by anodic electrodeposition

Zaidi

Harito

Walsh

et al. 2018

J Solid State Electrochem

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Reticulated vitreous carbon (RVC) substrates were coated with a composite of PbO 2 and titanate nanosheets (TiNS) by anodic electrophoretic depostion. The structure and morphological characteristics of the coating were evaluated by field emission scanning electron microscopy (FESEM) and Raman spectroscopy. The TiNS/PbO 2 /RVC coating contained the anatase phase and showed a well-defined, microporous morphology with hydrophilic character along the length and thickness of the RVC struts. Electrochemical and photocatalytic activity of the coatings facilitated RB-5 dye degradation as a model organic pollutant in wastewater. The electrochemical decolourisation involves the generation of hydroxyl free radicals over the TiNS/PbO 2 /RVC anode composite surface, whereas photocatalytic decolourisation was driven by the synergetic photocatalytic effect imparted by the photoinduced holes and free electron acceptors. The photocatalytic properties of the TiNS/PbO 2 coating were achieved by calcination at 450°C for 60 min in air which converted the titanate phase to anatase and modified its surface area. This enabled 98% electrochemical decolourisation of the RB-5 dye solution (measured by visible absorption at 597 nm) in a time of 60 min.Highlights • Stable TiNS/PbO 2 films on 100-ppi RVC were achieved by electrophoretic deposition.• SEM and Raman spectroscopy showed uniform layers of PbO 2 /TiNS. • PbO 2 /TiNS/RVC allowed 98% decolourisation of 100-mL RB-5 dye in 60 min.

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Section: Electrochemical Decolourisation and Colour Removal Of Rb-5 Dyecontrasting

confidence: 69%

Section: Electrochemical Studies Of the Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Decolourisation of reactive black-5 at an RVC substrate decorated with PbO2/TiO2 nanosheets prepared by anodic electrodeposition

Zaidi

Harito

Walsh

et al. 2018

J Solid State Electrochem

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“…The prepared nanocomposite was used for photocatalytic degradation of Acid Blue 113 (AB113) dye. AB113 is a popular industrial diazo dye, extensively used for dyeing wool, leather, silk, nylon and polyester fiber (De Moura, Quiroz, Da Silva, Salazar, & Martínez-Huitle, 2016;Nachiyar et al, 2012). So far, there is no report on the photodegradation of AB113 by nanoscale ZnS/TiO 2 composite.…”

Section: Introductionmentioning

confidence: 99%

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Talebi¹,

Chaibakhsh²,

Moradi‐Shoeili³

2017

Journal of Applied Research and Technology

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The synthesis of ZnS/TiO 2 nanocomposite was successfully performed by a chemical deposition method. The structure and morphology of the prepared catalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and FT-IR spectroscopy. The activity of the photocatalyst was evaluated for the removal of Acid Blue 113 (AB113) dye in aqueous solution under UV-A radiation. Response surface methodology (RSM) based on the central composite rotatable design (CCRD) was applied to study and optimize the photodegradation process. The effects of three experimental parameters including pH, irradiation time, and the catalyst dose on the AB113 removal were studied. A high dye removal (99.0%) was obtained by using minimum amount of the catalyst (37 mg) at the optimal conditions of 27.32 min and pH 6.18. Compared with pure nano-sized TiO 2 and ZnS, the synthesized nanocomposite exhibited a higher photocatalytic activity. The kinetics of AB113 adsorption on the surface of ZnS/TiO 2 nanocomposite could be described by the pseudo second order and parabolic-diffusion models.

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“…For the removal of dye, many technologies had been used, and they include chemical degradation and physical removal as well as biological process. Chemical degradation usually included photocatalysis , electrochemical degradation processing , and ozonation . The physical removal was also widely studied by adsorption method with different adsorbents .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cationic Grafted‐Microfiltration Membrane of PSF‐g‐QPDMAEMA and Study on its Adsorption and Rejection Performance for Acid Dye

Gao

Men

2020

Polymer Engineering & Sci

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Chloromethylated polysulfone (CMPSF) microfiltration membrane were first prepared by using immersion-precipitation phase transformation method, and then CMPSF membrane was modified into aminated PSF membrane (AMPSF membrane). A surface-initiating system of -NH 2 /S 2 O 8 2− was constituted at the interface between AMPSF membrane and a aqueous solution, in which monomer dimethylaminoethyl methacrylate (DMAEMA) and initiator ammonium persulfate were dissolved. The graft polymerization of DMAEMA was successfully realized on AMPSF membrane, resulting in the grafted membrane PSF-g-PDMAEMA. And then quaternization modification of the grafted membrane PSF-g-PDMAEMA was performed, resulting in the cationic microfiltration membrane of PSF-g-QPDMAEMA. The isothermal adsorption experiments of PSF-g-QPDMAEMA membrane for two acid dyes, reactive brilliant red (RBR), and reactive light yellow (RLY), were carried out, and the permeation experiments were also conducted. The experimental results show that PSF-g-QPDMAEMA membrane has strong adsorption ability for acid dyes by right of the electrostatic interaction between the quaternary ammonium cations on the surface of PSF-g-QPDMAEMA membrane and the sulfonate anions in the molecules of acid dyes as well as by right of cation-π interaction between the quaternary ammonium cations on PSF-g-QPDMAEMA membrane and the aromatic rings in the molecules of acid dyes. PSF-g-QPDMAEMA membrane displays excellent rejection and removing performance for acid dyes in water. POLYM. ENG. SCI., 60:900-908, 2020.

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Electrochemical degradation of Acid Blue 113 dye using TiO 2 -nanotubes decorated with PbO 2 as anode

Cited by 34 publications

References 39 publications

Decolourisation of reactive black-5 at an RVC substrate decorated with PbO2/TiO2 nanosheets prepared by anodic electrodeposition

Decolourisation of reactive black-5 at an RVC substrate decorated with PbO2/TiO2 nanosheets prepared by anodic electrodeposition

Application of nanoscale ZnS/TiO 2 composite for optimized photocatalytic decolorization of a textile dye

Preparation of Cationic Grafted‐Microfiltration Membrane of PSF‐g‐QPDMAEMA and Study on its Adsorption and Rejection Performance for Acid Dye

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