Immobilisation of TiO2 powder for the treatment of polluted water

Byrne, John; Eggins, Brian R.; Brown, N. M. D.; McKinney, Bryan L.; Rouse, Michelle

doi:10.1016/s0926-3373(97)00101-x

Cited by 396 publications

(215 citation statements)

References 32 publications

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“…Although the performance of sol-gel dip coating is satisfactory in terms of coating stability, the high temperature (typically higher than 400°C) heat treatment step for annealing after coating is not applicable to the textile-structured substrates without losing their physical and chemical integrity (Lim et al, 2009). Other coating methods, such as spin coating, electrochemical deposition, electrophoretic coating, and sputtering etc., usually have complicated steps to achieve the preferable film thickness and are also costly and difficult for practical application (Byrne et al, 1998;Kasanen et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

Han

Chang

Zhang

et al. 2012

Aerosol Air Qual. Res.

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Heterogeneous photocatalytic oxidation (PCO) has shown great potential for indoor air purification of gaseous pollutants. Research attention has been drawn to the synthesis of new functional photocatalysts, as well as to kinetic studies of the influences of various reaction parameters, e.g., relative humidity. Nevertheless, when applied for practical use, the coating method and coating stability of are also important factors that will directly affect the removal efficiency. In the present study, a simple and economical spray coating method was developed to effectively immobilize TiO 2 nanoparticles onto a polyester fiber filter at low temperature. Colloidal silica was added as a binder in the coating suspension. PCO efficiency evaluation of the coating was carried out using gaseous formaldehyde. The results indicate that the formaldehyde removal rate is associated with the amount of binder added. The highest removal rate was achieved for a coating with the TiO 2 to binder (SiO 2 equivalent) mass ratio of 1:1, with the results supported by XRF, SEM, FTIR and BET analyses. As compared to the conventional dip coating method, the spray-coated sample showed much higher PCO efficiency and stability, which may be mainly attributed to the more uniform dispersion of the catalyst and the stronger binding formed during high pressure spray coating. This coating method has great potential for large-scale applications of immobilized photocatalyst for indoor air purification.

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Section: Introductionmentioning

confidence: 99%

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

Han

Chang

Zhang

et al. 2012

Aerosol Air Qual. Res.

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“…There is a clear benefit in using such a simple method for production of anodes relative to other methods of catalyst deposition [35][36][37][38][39][40][41][42]. This system uses undoped TiO 2 on an inexpensive carbon ink base with a cast solvent procedure and operates at room temperature.…”

Section: Voltammetric Characterisation Of Formic Acidmentioning

confidence: 99%

A practical photoelectrochemical cell using non precious metal electrodes

2010

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In this study a Photoelectrochemical Cell (PEC) constructed with inexpensive materials photodegraded selected organic compounds present in model waste waters, with the concomitant production of electrical current. Organic substrates dissolved in salt water included formic acid, 2-propanol, 1,2-dihydroxybenzene and ascorbic acid. Significant degradation of ascorbic acid was achieved when the cell was illuminated with a household 60 W tungsten light bulb, although better results were achieved with UV sources. Degradation of all the compounds was found to occur by zero order kinetics, and the PEC was shown not to work appreciably in dark conditions. Using a conventional light bulb, a formic acid PEC produced a power density of 19.1 ± 2 mW m -2 . When exposed to natural daylight, a power density of 31.5 ± 2 mW m -2 was achieved. There is considerable scope for scale up of this device for exterior use.

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“…Among various oxide semiconductor photocatalysts, TiO 2 photocatalyst is found to be a more efficient catalyst for photocatalytic degradation of pollutants due to faster electron transfer to molecular oxygen [12]. Apart from that, TiO 2 is the most suitable catalyst for widespread environmental application because of its biological and chemical inertness, strong oxidizing power, non-toxicity and longterm stability against photo and chemical corrosion [13][14].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Rhodamine B Dye by TiO₂Nanotubes Photocatalyst Synthesized via Alkaline Hydrothermal Method

Mazlina

Jusman

2015

MATEC Web of Conferences

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Abstract. Titanium dioxide (TiO2) nanotubes have successfully been synthesized by using one step approach of hydrothermal method. Commercial TiO 2 (anatase) powder was used as precursor to synthesize the TiO2 nanotubes. The TiO 2 nanotubes were synthesized at 120 o C/20 hrs in an alkaline solution of NaOH. The photocatalytic study of the as-synthesized samples was conducted by analyzing the degradation of Rhodamine B (Rh B) dye under UV light irradiation. Rh B is a toxic dye which is commonly used in textile industry. It is the one of the most common pollutants in the effluents and highly soluble in water. A comparison study was carried out in order to investigate the photocatalytic activity between the synthesized TiO 2 nanotubes and the commercial TiO2 nanoparticles. Results show that the TiO 2 nanotubes exhibits better photocatalytic activity in the degradation of Rh B as compared to the TiO2 nanoparticles.

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Immobilisation of TiO2 powder for the treatment of polluted water

Cited by 396 publications

References 32 publications

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

A practical photoelectrochemical cell using non precious metal electrodes

Degradation of Rhodamine B Dye by TiO₂Nanotubes Photocatalyst Synthesized via Alkaline Hydrothermal Method

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Immobilisation of TiO2 powder for the treatment of polluted water

Cited by 396 publications

References 32 publications

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

Preparation of TiO2-Coated Polyester Fiber Filter by Spray-Coating and Its Photocatalytic Degradation of Gaseous Formaldehyde

A practical photoelectrochemical cell using non precious metal electrodes

Degradation of Rhodamine B Dye by TiO2Nanotubes Photocatalyst Synthesized via Alkaline Hydrothermal Method

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Degradation of Rhodamine B Dye by TiO₂Nanotubes Photocatalyst Synthesized via Alkaline Hydrothermal Method