Removing volatile organic compounds in cooking fume by nano-sized TiO2 photocatalytic reaction combined with ozone oxidation technique

Li, Yuhua; Cheng, Su-Wen; Yuan, Chung-Shin; Lai, Tzu-Fan; Hung, Chung-Hsuang

doi:10.1016/j.chemosphere.2018.06.035

Cited by 34 publications

(12 citation statements)

References 39 publications

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“…It can also play a precursor role in the generation of other strong oxidizing agents such as hydroxyl radicals (redox potential = 2.86 V) and indirectly trigger the VOC decomposition reactions (equations ( 5)-( 8)) [18,23]:…”

Section: Photocatalytic Performancementioning

confidence: 99%

“…Therefore, the resulting pollution at the reactor outlet will be negligible [20,21]. In addition, although some reports showed that ozone was a strong oxidative agent and helpful for the mineralization of VOCs over the photocatalyst and it is consumed during the photocatalytic degradation process [22][23][24][25]. However, other studies reported that the outlet ozone concentrations were still very hazardous to the indoor environments especially where sensitive people were suffering from respiratory diseases [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Abedi

Shahmoradi

Mohammadi

et al. 2022

Mater. Res. Express

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Modification of TiO2 is one of the techniques used to enhance its photodegradation efficiency and to make it visible-light-active. In this study, Mo-doped TiO2 nanoparticles were synthesized using a fast sol-gel technique, and then coated on granular activated carbon (GAC) as both substrate and adsorbent to obtain Mo:TiO2/GAC composite. The fabricated composite was characterized using powder XRD, SEM, EDAX, FTIR, and BET analysis. Then the composite was applied to photodegrade volatile organic compounds (VOCs) under both UV and visible light irradiation. The characterization results showed high crystallinity and purity. Mo:TiO2/GAC composite had higher photodegradation efficiency compared with bare TiO2 and bare GAC. Moreover, studying operational parameters showed that the optimum condition for photodegradation efficiency of VOCs was at flowrate of 1 l/min, VOCs concentration of 20 ppm, and light intensity of 400 and 600 W/m2 for UV and visible light respectively. The results suggest that Mo:TiO2/GAC is a visible-light-active composite and can be acceptably used to decompose VOCs under visible light with adequate efficiency and without the generation of harmful by-products such as O3 as compared with UV.

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Section: Photocatalytic Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Abedi

Shahmoradi

Mohammadi

et al. 2022

Mater. Res. Express

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show abstract

“…They found that a TiO 2 ratio exceeding 5 wt% resulted in a significant improvement in the conductivity [22]. Because one feature of photocatalysis is to purify air, TiO 2 has been commonly investigated in previous studies on air filter materials [23][24][25][26][27]. For example, Lee et al strengthened the decomposition of benzene and toluene by means of this particular feature of TiO 2 [23].…”

Section: Introductionmentioning

confidence: 99%

Filtration Efficiency of Electret Air Filters Reinforced by Titanium Dioxide

et al. 2020

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In this study, titanium dioxide (TiO2), a mineral with a potential and supercapacitor, is used as the reinforcing material to improve the filtration efficacy of electret melt-blown fabrics. Next, the electret melt-blown fabrics are evaluated in terms of surface voltage and filtration efficiency, thereby examining the influences of the TiO2 ratio and electric field intensity. The test results indicate that the filtration efficiency is proportional to the ratio of TiO2 and electric field intensity. In particular, with a TiO2 ratio of 3 wt% and an electric field intensity of 2.5 kV/cm, the electret melt-blown fabrics demonstrate a maximal filtration efficiency of 96.32%, a lowest pressure drop of 40 Pa, and an optimal quality factor of 0.083 Pa−1.

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“…In recent years, increasing basic research for catalyst is the result of a concerted effort on concerning odor-chemicals leading to decreased odor exhaust from range hood [14][15][16][17][18][19][20]. Discovery of single-atom catalysts along with an in-depth understanding for their activity, storage capacity and stability have played a major role in developing control technology.…”

Section: Introductionmentioning

confidence: 99%

Synergetic effect of N/P/B coordinated Fe/Co on carbon support catalysts for removing odor-chemicals of cooking source

2020

SN Appl. Sci.

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Odor-chemicals from cooking source have cancer risk for family members and commercial kitchen workers. They are now enabling O 3 formation and beginning to enter the one of the main pollutants in life. The diffusion of odor-chemicals is due to scarce adsorbing materials in rang hoods, resulting in urgency of design and development of low-cost materials. Catalytic methods involving oxidation and incineration of odor-chemicals have been explored. Following basic research for catalysts have been focused on catalytic performance, process, activity sites, stability and storage capability. Herein, we calculated reaction process between Fe/Co-N/P/B-C catalysts and CH 4 using density functional theory method. The catalytic performance of nitrogen and phosphorus or boron dual-coordinated iron or cobalt atoms on carbon material was discussed. Total activation energy required for these catalysts was decreased relative to Pt/C. Based on the results of charge density and projected density-of-states, we found that strong Fe/Co 3d electron composition and electron transfer from N 2p/P 3p to Fe/Co 3d were highly dispersed on carbon material, activity sites formed at the surface of materials could efficiently migrate and storage CH 4 and enhance the catalytic capability and stability. The work presented herein highlights the importance of density functional theory method quantified synergetic effects on material properties and more importantly demonstrated the potential of active sites toward enhancing the storage capability and stability of materials for practical applications.

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Removing volatile organic compounds in cooking fume by nano-sized TiO2 photocatalytic reaction combined with ozone oxidation technique

Cited by 34 publications

References 39 publications

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Filtration Efficiency of Electret Air Filters Reinforced by Titanium Dioxide

Synergetic effect of N/P/B coordinated Fe/Co on carbon support catalysts for removing odor-chemicals of cooking source

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Removing volatile organic compounds in cooking fume by nano-sized TiO2 photocatalytic reaction combined with ozone oxidation technique

Cited by 34 publications

References 39 publications

Photocatalytic degradation of VOCs from air stream using Mo:TiO2/GAC nanocomposites

Photocatalytic degradation of VOCs from air stream using Mo:TiO2/GAC nanocomposites

Filtration Efficiency of Electret Air Filters Reinforced by Titanium Dioxide

Synergetic effect of N/P/B coordinated Fe/Co on carbon support catalysts for removing odor-chemicals of cooking source

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Product

Resources

About

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites

Photocatalytic degradation of VOCs from air stream using Mo:TiO₂/GAC nanocomposites