Development of a hybrid environmental purification unit by using of excimer VUV lamps with TiO2 coated titanium mesh filter

Ochiai, Tsuyoshi; Masuko, Ken; Tago, Shoko; Nakano, Ryuichi; Niitsu, Yasuji; Kobayashi, Go; Horio, Koji; Nakata, Kohei; Murakami, Taketoshi; Hara, Masayuki; Nojima, Yuki; Kurano, Masahiro; Serizawa, Izumi; Suzuki, Tomonori; Ikekita, Masahiko; Morito, Yuko; Fujishima, Akira

doi:10.1016/j.cej.2012.12.048

Cited by 22 publications

(9 citation statements)

References 51 publications

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“…The detoxification and disinfection effects of photocatalytic ozonation have been assessed by several research groups using various standard biotests. Ochiai et al [70] described that shifting from simple ozonation to photocatalytic ozonation nearly doubled the removal rate constants for waterborne pathogens (evaluated by E.coli standard kit). Beltran et al [68] conducted acute toxicity Danphnia tests and reported decreasing the ecotoxicity of sulfamethoxazole solutions from 60% to 10% after a 120 min photocatalytic ozonation treatment.…”

Section: Reduction Of Toxicity By Photocatalytic Ozonationmentioning

confidence: 99%

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A review on photocatalytic ozonation used for the treatment of water and wastewater

Mehrjouei

Müller

Möller

2015

Chemical Engineering Journal

494

147

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Section: Reduction Of Toxicity By Photocatalytic Ozonationmentioning

confidence: 99%

“…Diverse designs for immobilised photocatalysts used in photocatalytic ozonation processes have been reported [47,58,61,62,70]. Cernigoj et al [47] reported the deposition of film reactor [76,77].…”

Section: Application Of Photocatalysts To Photocatalytic Ozonation Rementioning

confidence: 99%

A review on photocatalytic ozonation used for the treatment of water and wastewater

Mehrjouei

Müller

Möller

2015

Chemical Engineering Journal

494

147

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“…3). 8,[10][11][12][13][14][15][16] Among them, the author proposes a practical air-cleaner using photocatalysis-plasma synergistic reactor in the next section. Electrochemistry, 82(9), 720-725 (2014) described previously.…”

Section: Fabrication and Application Of Tio 2 -Coated Ti-mesh As An Ementioning

confidence: 99%

Environmental and Medical Applications of TiO2 Photocatalysts and Boron-doped Diamond Electrodes

Ochiai

2014

Electrochemistry

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This paper summarized the author's recent studies about effective design of the systems for environmental and dental application of TiO 2 photocatalysts and boron-doped diamond (BDD) electrodes. The titanium mesh impregnated photocatalyst, TMiP™ has been fabricated as a novel photocatalytic filter. The high mechanical flexibility of TMiP allows us to design any geometry of modules by combination of UV-sources and the other technologies. In this paper, a practical air-cleaner using the TMiP-plasma synergistic reactor was fabricated and installed in a real-scale smoking room in the office. The amounts of the compounds in tobacco smoke were almost totally removed by the air-cleaner. On the other hands, the author also reported the possibilities of wastewater treatments by electrolysis with BDD electrodes. Based on these studies, a novel pinpoint ozone-water production unit for dental treatment using of BDD microelectrodes was developed. The unit showed almost the same sterilization ability as conventional 20 ppm of aqueous sodium hypochlorite treatment in in vitro assessment in the root-canal of bovine teeth. These results present several key solutions for practical applications of TiO 2 photocatalysis and BDD electrolysis.

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“…The treated Ti-mesh was dip-coated with 25 wt % of TiO 2 anatase sol (TKD-701, TAYCA, Osaka, Japan) and was heated at 550 °C for 3 h. The structural and surface morphology of TMiP were examined and studied by using X-ray diffraction and Scanning Electron Microscopy. [12,16]. When the alternating current (AC) high voltage is applied to the electrodes, the dielectric barrier discharge occurs in the quartz tube which provides intense narrow band radiation at 172 nm from a xenon excimer (Xe 2 *) [22].…”

Section: Fabrication Of Tmipmentioning

confidence: 99%

“…Thus, although many researchers have been working on photocatalytic water purification, it could not be developed to the stage of effective real industrial technology because of the difficulty in fabricating a practical water purifier. Recently we have developed an easy-to-handle photocatalytic filter material, TiO 2 nanoparticles modified titanium mesh (Titanium mesh impregnated photocatalyst, TMiP™), and its applications for environmental purification [4,[10][11][12][13][14][15][16]. Due to the highly-ordered three-dimensional structure modified with TiO 2 nanoparticles, TMiP provides excellent breathability for both air and water while maintaining a high level of surface contact.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Water-Treatment Reactors Using a TiO2-Modified Ti-Mesh Filter

Ochiai

Masuko

Tago

et al. 2013

Water

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Abstract:The recent applications of a TiO 2 -modified Ti-mesh filter (TMiP™) for water purification are summarized with newly collected data including biological assays as well as sewage water treatment. The water purification reactors consist of the combination of a TMiP, a UV lamp, an excimer VUV lamp, and an ozonation unit. The water purification abilities of the reactor were evaluated by decomposition of organic contaminants, inactivation of waterborne pathogens, and treatment efficiency for sewage water. The UV-C/TMiP/O 3 reactor disinfected E. coli in aqueous suspension in approximately 1 min completely, and also decreased the number of E. coli in sewage water in 15 min OPEN ACCESSWater 2013, 5 1102 dramatically. The observed rate constants of 7.5 L/min and 1.3 L/min were calculated by pseudo-first-order kinetic analysis respectively. Although organic substances in sewage water were supposed to prevent the UV-C/TMiP/O 3 reactor from purifying water, the reactor reduced E. coli in sewage water continuously. On the other hand, although much higher efficiencies for decomposition of organic pollutants in water were achieved in the excimer/TMiP reactor, the disinfection activity of the reactor for waterborne pathogens was not as effective as the other reactors. The difference of efficiency between organic pollutants and waterborne pathogens in the excimer/TMiP reactor may be due to the size, the structure, and the decomposition mechanism of the organic pollutants and waterborne pathogens. These results show that a suitable system assisted by synergy of photocatalysts and other technologies such as ozonation has a huge potential as a practical wastewater purification system.

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Development of a hybrid environmental purification unit by using of excimer VUV lamps with TiO2 coated titanium mesh filter

Cited by 22 publications

References 51 publications

A review on photocatalytic ozonation used for the treatment of water and wastewater

A review on photocatalytic ozonation used for the treatment of water and wastewater

Environmental and Medical Applications of TiO2 Photocatalysts and Boron-doped Diamond Electrodes

Synergistic Water-Treatment Reactors Using a TiO2-Modified Ti-Mesh Filter

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