Deodorization of food-related nuisances from a refrigerator: The feasibility test of photocatalytic system

Jo, Sang-Hee; Kim, Ki‐Hyun; Kim, Yong Hyun; Lee, Minhee; Kim, Bo-Won; Ahn, Jeong-Hyeon

doi:10.1016/j.cej.2015.04.116

Cited by 22 publications

(10 citation statements)

References 34 publications

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“…The commercialisation of photocatalysis technology has gained significant interest in recent decades. The photocatalysis concept has been successfully established for various commercial products, such as cement [2], air purifier [3], paints [4], water filter [5], deodorisers [6], mosquito repellent fabrics [7], and antimicrobial doping on the phase stability of anatase, formation of oxygen vacancies, and the photocatalytic activity to show that Mo doping could preserve the anatase content at high calcination temperature and thus enhance the activity of TiO 2 . A comprehensive analysis on the relationship between the dopant concentration and the surface characteristics of TiO 2 is discussed.…”

Section: Introductionmentioning

confidence: 99%

Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

et al. 2020

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This work outlines an experimental and theoretical investigation of the effect of molybdenum (Mo) doping on the oxygen vacancy formation and photocatalytic activity of TiO 2 . Analytical techniques such as x-ray diffraction (XRD), Raman, x-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) were used to probe the anatase to rutile transition (ART), surface features and optical characteristics of Mo doped TiO 2 (Mo-TiO 2 ). XRD results showed that the ART was effectively impeded by 2 mol% Mo doping up to 750°C, producing 67% anatase and 33% rutile. Moreover, the crystal growth of TiO 2 was affected by Mo doping via its interaction with oxygen vacancies and the Ti-O bond. The formation of Ti-O-Mo and Mo-Ti-O bonds were confirmed by XPS results. Phonon confinement, lattice strain and non-stoichiometric defects were validated through the Raman analysis. DFT results showed that, after substitutional doping of Mo at a Ti site in anatase, the Mo oxidation state is Mo 6+ and empty Mo-s states emerge at the titania conduction band minimum. The empty Mo-d states overlap the anatase conduction band in the DOS plot. A large energy cost, comparable to that computed for pristine anatase, is required to reduce Mo-TiO 2 through oxygen vacancy formation. Mo 5+ and Ti 3+ are present after the oxygen vacancy formation and occupied states due to these reduced cations emerge in the energy gap of the titania host. PL studies revealed that the electron-hole recombination process in Mo-TiO 2 was exceptionally lower than that of TiO 2 anatase and rutile. This was ascribed to introduction of 5s gap states below the CB of TiO 2 by the Mo dopant. Moreover, the photo-generated charge carriers could easily be trapped and localised on the TiO 2 surface by Mo 6+ and Mo 5+ ions to improve the photocatalytic activity. coatings [8,9]. The most commonly existing crystalline polymorphs of TiO 2 are anatase, rutile and brookite [10][11][12]. Anatase is accepted to be the more active phase of TiO 2 and is preferred by the ceramic industries to fabricate light active antimicrobial indoor building materials such as ceramics, glass, tiles and sanitary surfaces [13,14]. This requires thermal stability of the anatase phase under typical ceramic processing conditions. TiO 2 anatase is mainly fabricated at low calcination temperatures (∼500°C) to prevent the anatase to rutile phase transition (ART) [15][16][17], which produces the less photo-active rutile phase. The photo-activity of anatase arises from its appropriate band edge positions, electron affinity, ionisation potential, and the long lifetime of charge carriers [10,12,18]. Moreover, transient photo-conductance analysis has revealed that the electron-hole recombination phenomena in anatase (101) phase is much slower compared to rutile (110), which is credited in part to the indirect band gap of anatase [11,19].The unit cells of anatase and rutile phases are composed of TiO 6 octahedra with titanium atoms at the centre and oxygen atoms at the vertices [20]. Both anatase and rutile have a t...

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Section: Introductionmentioning

confidence: 99%

Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

et al. 2020

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“…Maneerat and Hayata (2008) found that titanium dioxide (TiO 2 ) has an ability to oxidize ethylene and the results of Muggli and Ding (2001) showed that the titanium dioxide photocatalytic (TPC) reaction can completely oxidize ethylene, acetaldehyde, and ethanol to carbon dioxide and water. So far, studies on application of TiO 2 in food mainly have focused on food packaging (Athir et al, 2020;Kaewklin et al, 2018) and photocatalytic reactor (Shahbaz et al, 2016). Jo et al (2015 evaluated the deodorization effect of TPC system on various food samples of refrigerators.…”

Section: Practical Applicationsmentioning

confidence: 99%

“…So far, studies on application of TiO 2 in food mainly have focused on food packaging (Athir et al, 2020; Kaewklin et al, 2018) and photocatalytic reactor (Shahbaz et al, 2016). Jo et al (2015) evaluated the deodorization effect of TPC system on various food samples of refrigerators. And Zhu et al (2019) studied the degradation effect of TPC on ethylene in fruit packaging materials.…”

Section: Introductionmentioning

confidence: 99%

Quality maintenance of 1‐Methylcyclopropene combined with titanium dioxide photocatalytic reaction on postharvest cherry tomatoes

Liu

et al. 2022

Food Processing Preservation

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This study explored the effects of 1‐MCP combined with TPC treatment on bioactive compounds, odor, and ultrastructure of cherry tomatoes during postharvest storage. The results showed that the three treatments could all maintain the firmness, soluble solids, and titratable acidity content. It was noteworthy that TPC applied to cherry tomatoes had positive effects on removing off‐flavors and reducing accumulation of malondialdehyde, and it can better retain the lycopene content compared with 1‐MCP in the later storage period. In addition, the combined treatment was more effective than the control check, single 1‐MCP and single TPC, which can inhibit the respiration and ethylene production of cherry tomatoes, maintain the ascorbic acid content, and sustain the integrity of peel and pulp cell structure during postharvest storage. Our study concluded that 1‐MCP + TPC was a feasible technology that can enhance the effect of single 1‐MCP treatment and make up for the limitations of single treatment. Practical applications The moisture content of cherry tomatoes is higher than 90% so that cherry tomatoes are prone to softening, rot, and quality deterioration after harvest. They are typical climacteric fruits with obvious respiratory peaks. In the process of postharvest transportation and storage, intricate physiological and biochemical reactions occur in cells. A growing number of studies had shown that 1‐Methylcyclopropene had certain limitations. We used combined treatment, in order to enhance the effect of single 1‐Methylcyclopropene treatment and better guarantee the edible value and commodity value of postharvest cherry tomatoes. Our research showed that 1‐Methylcyclopropene combined with titanium dioxide photocatalytic treatment may become an advanced preservation technology, and can provide a new idea for improving the storage quality of postharvest cherry tomatoes.

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“…Photocatalysis, a kind of advanced oxidation technology, has been widely studied for water purification, 4–6 antibacterial, 7 anti-fog, 8 deodorization, 9 antifouling 10 treatment since it was first reported in 1972. 11 In recent years, a growing body of research was carried out on photocatalytic degradation of antibiotics in pharmaceutical wastewater, 12–16 which was expected to make up for the deficiency of traditional biochemical treatment which is time-consuming and often unreliable.…”

Section: Introductionmentioning

confidence: 99%

2D–2D ZnO/N doped g-C₃N₄ composite photocatalyst for antibiotics degradation under visible light

2021

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Deodorization of food-related nuisances from a refrigerator: The feasibility test of photocatalytic system

Cited by 22 publications

References 34 publications

Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

Quality maintenance of 1‐Methylcyclopropene combined with titanium dioxide photocatalytic reaction on postharvest cherry tomatoes

2D–2D ZnO/N doped g-C₃N₄ composite photocatalyst for antibiotics degradation under visible light

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Deodorization of food-related nuisances from a refrigerator: The feasibility test of photocatalytic system

Cited by 22 publications

References 34 publications

Mo doped TiO2: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

Mo doped TiO2: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

Quality maintenance of 1‐Methylcyclopropene combined with titanium dioxide photocatalytic reaction on postharvest cherry tomatoes

2D–2D ZnO/N doped g-C3N4 composite photocatalyst for antibiotics degradation under visible light

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Product

Resources

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Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

Mo doped TiO₂: impact on oxygen vacancies, anatase phase stability and photocatalytic activity

2D–2D ZnO/N doped g-C₃N₄ composite photocatalyst for antibiotics degradation under visible light