Improved Photocatalytic Degradation of Textile Dye Using Titanium Dioxide Nanotubes Formed Over Titanium Wires

Kar, Archana; Smith, York R.; Subramanian, Vaidyanathan

doi:10.1021/es8031049

Cited by 180 publications

(97 citation statements)

References 33 publications

(38 reference statements)

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“…Many treatment methods, including adsorption,[4À6] chemical coagulation, [7] membrane separation, [8] photo-catalytic degradation, [9,10] and biological treatment [11] have been developed for the removal of dyes from aquatic environment. Among these methods, adsorption was proved to be an effective method due to its low cost, high efficiency, and simple operation.…”

Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from water by cellulose/graphene oxide fibres

Chen

et al. 2016

Journal of Experimental Nanoscience

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A novel and efficient cellulose/graphene oxide (CGO) fibre adsorbent was prepared by wet-spinning technique. The morphology and physicochemical properties of the CGO fibres were characterised by scanning electron microscope (SEM), Fourier transform infrared spectrometer, and thermo-gravimetric analysis. The equilibrium adsorption data were well fitted to the Langmuir models, and the adsorption capacity calculated from the Langmuir model reached 480.77 mg/g at 318 K. The adsorption kinetic studies revealed that pseudo-second-order model best describes the adsorption kinetic data. The thermodynamic parameters indicated that the adsorption was an endothermic and spontaneous process. Furthermore, the CGO fibre, which is very stable and easily separable, can be recycled with a dilute NaOH solution wash, retaining over 93% of the adsorption capacity after recycling three times.

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Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from water by cellulose/graphene oxide fibres

Chen

et al. 2016

Journal of Experimental Nanoscience

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“…It can also disinfect bacteria like Escherichia coli and remove organic dyes. [28][29][30][31][32][33][34][35][36][37] TiO 2 is also a good removal material for heavy metals, especially chromium (Cr), arsenic (As), cadmium (Cd), copper (Cu), and lead (Pb). The ability to remove toxic compounds of TiO 2 NP together with the ability to adsorb on the large surface area and uniform pores of MCM-48 can be combined to make a great material for water purification.…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of a hybrid mesoporous material infused with metallic oxide nanoparticles for water treatment

Deksissa

2017

Nanomaterials and Nanotechnology

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In the current study, a hybrid mesoporous material infused with metallic oxide nanoparticles, MCM-48 with TiO 2 nanoparticles, has been developed for potential application in water treatment. MCM-48 belongs to a family of mesoporous siliceous materials-M41S, in which MCM-48 has a unique three-dimensional cubic symmetry structure. Using this hybrid approach, it will allow the polluted water to pass through the strong yet high permeable structure of mesoporous material and to allow enough time for the pollutants to react with the metallic oxide nanoparticles infused on the porous structure so that the polluted water can be treated without introducing secondary pollutants. A modified hydrothermal method has been developed to synthesize three samples of this hybrid material with TiO 2 nanoparticles of 15, 50, and 300 nm in diameter, respectively. The microstructures before and after the infusion of nanoparticles are characterized using scanning electron microscope and X-ray powder diffraction. Under the current study, the synthesized samples are tested for their capability of removing organic dye and trace metals. The results have shown that while all three hybrid materials have shown over 80% adsorption rate for organic dye, the sample synthesized using 300 nm TiO 2 nanoparticle has shown the highest adsorption rate. Similarly, the highest adsorption rate for most trace metals tested here also occurs in the sample made with 300 nm TiO 2 nanoparticle. Coincidently, the sample prepared with 300 nm TiO 2 nanoparticle has a much larger internal surface area and smaller average pore size compared to the two other samples, which may lead to the higher adsorption rate of trace metals and organic dye tested here. This study has presented a hybrid mesoporous material that can be potentially used for pollutants removal in water treatment. Future study is needed to investigate how to reuse this hybrid mesoporous material and to obtain a further understanding of the mechanism affecting the micro structures of the hybrid material.

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“…It is not an easy task to remove them from dye-bearing waste waters owing to their stability towards oxidizing agents [1][2][3]. Amongst the various organic dyes, methylene blue (MB)-a cationic dye mostly used in paper, rubber, and textile industry as colorants-is found in waste water [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

Behera¹,

Giri²

2016

Int J Ind Chem

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We synthesized cuprous oxide (Cu 2 O) nanoparticles (NPs) with an average crystallite size of 8.8 nm in presence of Arka (Calotropis gigantea) leaves extract. The photo-bleaching activity of Cu 2 O NPs on the aqueous methylene blue (MB) dye was studied by illumination of visible light. In the absorption spectra, a decrease in the absorption peak intensity at 665 nm of MB was observed in presence of Cu 2 O NPs. A red shift in its peak position as a function of irradiation time is suggesting that oxide particles are degrading the organic dye in an aqueous medium. In the vibration spectra, red shift in the C-H stretching band (2954, 2926, and 2855 cm -1 ) of methylene group and C-N stretching band (1343 and 1226 cm -1 ) of MB in presence of Cu 2 O NPs proposes a surface adsorption of MB over NP's surfaces. Quenching in the emission band intensity and red shifts in the peak maxima of MB in presence of Cu 2 O NPs is ascribed to the charge transfer interaction between MB and oxide NPs. A linear SternVolmer plot reveals that decrease in the emission intensity of MB dye occurs via the dynamic quenching mechanism. Synthesis of Cu 2 O NPs of various architectures using a green route could be use as an approach towards the costeffective treatment of water pollutants.

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Improved Photocatalytic Degradation of Textile Dye Using Titanium Dioxide Nanotubes Formed Over Titanium Wires

Cited by 180 publications

References 33 publications

Removal of methylene blue from water by cellulose/graphene oxide fibres

Removal of methylene blue from water by cellulose/graphene oxide fibres

Development and characterization of a hybrid mesoporous material infused with metallic oxide nanoparticles for water treatment

Inquiring the photocatalytic activity of cuprous oxide nanoparticles synthesized by a green route on methylene blue dye

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