Application of a hybrid system comprising carbon-doped TiO2 film and a ceramic media-packed biofilter for enhanced removal of gaseous styrene

Kim, Moon-Sun; Liu, Gang; Cho, Hongkwan; Kim, Byung-Woo

doi:10.1016/j.jhazmat.2011.03.075

Cited by 20 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, during the application and post-application stages of these synthetic materials [1,2], styrene will inevitably emit into atmosphere and cause serious neurotoxic, hematological, cytogenetic and carcinogenic effects on humans after long-term continuous exposure [3]. Therefore, the removal of VOCs such as styrene is urgent for environment and human health protection.…”

Section: Introductionmentioning

confidence: 99%

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Chen

Zhao

et al. 2017

Applied Catalysis B: Environmental

114

View full text Add to dashboard Cite

ABO 3-type perovskites (A=La, Ce, Sm; B=Cr, Mn, Fe, Co, Ni) were systematically fabricated via a facile soft-templated sol-gel with post-calcination method through a complexation-carbonation-oxidation process, which were successfully applied in the visible-light-driven photothermocatalytic degradation of volatile organic compounds (VOCs) for the first time. Preliminary characterization results revealed the lower impact to the oxidative performance and visible-light-absorption properties of ANiO 3 than LaBO 3 , while the latter ones should present more attractive promotion of catalytic performance toward VOC degradation. Subsequently catalytic degradation of VOCs using gaseous styrene as model compound confirmed that all LaBO 3-type perovskites possessed both high visible-light-driven photocatalytic and temperature-induced thermocatalytic activities. Meanwhile, synergetic effect between photocatalysis and thermocatalysis activities of different position B substituted LaBO 3 resulted in different enhancement of their photothermocatalytic activities, where the highest synergistic factor (3.53) was obtained for LaMnO 3 at 140 o C. Besides, the synergetic effect could also effectively preserve the activity of the perovskite catalysts (eg. LaMnO 3) that almost the same removal efficiency (ca. 96.6% within 40 min) was obtained to styrene (initial concentration of 40 ppmv) after five continuous cycling tests. The highly and stably photothermocatalytic activity of these perovskites were attributed to the coefficient effect of the small crystal size and narrower bandgap as well as high visible light absorption and reducibility. This work could provide an efficient and practical way to utilize the total energy of sun for the remediation of atmospheric environment pollutions.

show abstract

Section: Introductionmentioning

confidence: 99%

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Chen

Zhao

et al. 2017

Applied Catalysis B: Environmental

114

View full text Add to dashboard Cite

show abstract

“…For instance, the degradation efficiencies of gaseous ethylbenzene [20] and styrene [21] were enhanced in the PCbiofiltration hybrid system. The enhancement of PC pre-treatment is maybe due to the reduction of pollutant concentrations and the production of more oxidized compounds, which are in most cases more easily biodegradable than the former ones and then relieve the inhibitory effect of microorganisms for degradation of toxic compounds.…”

Section: Introductionmentioning

confidence: 99%

Pollution profiles, health risk of VOCs and biohazards emitted from municipal solid waste transfer station and elimination by an integrated biological-photocatalytic flow system: A pilot-scale investigation

Zhang

Sun

et al. 2013

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Anthropogenic VOCs dominate in urban areas, with a global flux of ~110 TgC per year 1 2 . Benzene series pollutants are important atmospheric anthropogenic VOCs, and most of them are toxic, mutagenic and carcinogenic to humans 3 4 5 . A variety of technologies have been investigated to determine how to effectively remove benzene pollutants from the atmospheric phase 6 7 8 9 .…”

mentioning

confidence: 99%

Theoretical investigation on the adsorption configuration and •OH-initiated photocatalytic degradation mechanism of typical atmospheric VOCs styrene onto (TiO2)n clusters

Wang

Chen

et al. 2015

Sci Rep

View full text Add to dashboard Cite

In this study, the adsorption mechanism and hydroxyl radical (•OH)-initiated photocatalytic degradation mechanism of styrene onto different (TiO2)n clusters were investigated using density functional theory. Styrene, a typical model atmospheric volatile organic compound (VOC), was found to be readily adsorbed onto (TiO2)n clusters through its vinyl group with strong chemisorption. This suggests that (TiO2)n clusters (sub 1 nm) are able to effectively adsorb and trap styrene. Adsorbed styrene is then easily attacked by •OH to form a series of vinyl-OH-adducts. Conversely, phenyl-OH-adducts and H-abstraction products are very difficult to form in this system. Kinetics calculations using canonical variational transition state theory show that temperature has little effect on the rate constants during photocatalytic degradation process. The presence of TiO2 does not change the degradation mechanism of styrene, but can accelerate its photocatalyic degradation rate, and the rate will increase as TiO2 cluster size increases; as such, the TiO2 nano-clusters catalyst should have the photocatalytic ability to effectively degrade styrene. This theory-based study offers insights into the catalytic effect of TiO2 catalyst and the photocatalytic degradation mechanism of benzene series air pollutants at the molecular level.

show abstract

Application of a hybrid system comprising carbon-doped TiO2 film and a ceramic media-packed biofilter for enhanced removal of gaseous styrene

Cited by 20 publications

References 23 publications

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Visible-light-enhanced photothermocatalytic activity of ABO3-type perovskites for the decontamination of gaseous styrene

Pollution profiles, health risk of VOCs and biohazards emitted from municipal solid waste transfer station and elimination by an integrated biological-photocatalytic flow system: A pilot-scale investigation

Theoretical investigation on the adsorption configuration and •OH-initiated photocatalytic degradation mechanism of typical atmospheric VOCs styrene onto (TiO2)n clusters

Contact Info

Product

Resources

About