Synergetic effect between adsorption and photodegradation on rGO/TiO2/ACF composites for dynamic toluene gaseous removal

Li, Yuwei; Liu, Fang; Li, Meng; Wang, Xuye; Qi, Xuejin; Li, Wei; Xue, Ming; Wang, Yongqiang; Han, Fei

doi:10.1007/s11356-019-07565-x

Cited by 15 publications

(6 citation statements)

References 73 publications

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“…ACF has good electronic conductivity and can transfer photogenerated eand h + to the electron acceptor through the interface charge transfer, and the large pores between ACF bers can reduce the mass transfer limitation and accelerate the ow of toluene among them. TiO 2 produces photogenerated eand h + under the excitation of ultraviolet light, and reacts with O 2 , -OH and H 2 O on the surface to generate hydroxyl radicals and superoxide radicals (Li et al 2020b). The toluene molecules which were adsorbed will react with hydroxyl radicals and superoxide radicals and be transformed to CO 2 , H 2 O and other intermediates (Reddy et al 2015).…”

Section: Mechanism Analysis Of Toluene Removal By Tio 2 /Acf-ac Compositesmentioning

confidence: 99%

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Sun

Zhang

et al. 2021

Preprint

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Activated carbon fiber (ACF) was modified by Zn(NO3)2, ZnCl2 and Zn(CH3COO)2), respectively, and then TiO2 was loaded on the modified ACFs. The adsorption and photocatalysis performance were explored through the removal of toluene, and TiO2/ACF-Ac modified by Zn(CH3COO)2) with the best toluene performance was selected. The characterization results indicated that TiO2 was mainly loaded on the surface with large amount of oxygen-containing functional groups in anatase phase. The photoelectric chemical experiment results demonstrated that the modified ACFs remarkably improved the charge transmission and the separation efficiency of electrons and holes, and enhanced the utilization rate of sunlight. The adsorption saturation time reached 40 hours and photodegradation rate was 70%. The direct desorption of generated small molecule substances such as H2O and CO2 from the surface of the composites can achieve the in-situ regeneration of the adsorbent. Overall, the bifunctional catalysts provide a prospective way for the treatment of VOCs.

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Section: Mechanism Analysis Of Toluene Removal By Tio 2 /Acf-ac Compositesmentioning

confidence: 99%

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Sun

Zhang

et al. 2021

Preprint

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“…Electrons and holes can react with O 2 and H 2 O to produce potent oxidizing radicals, such as hydroxyl radicals ( • OH) with standard reduction potentials of approximately 2.8 V and superoxide radical anions ( • O 2 − ). When contacting with the radicals, the contaminant molecules are broken down into smaller molecules and are eventually converted to CO 2 , H 2 O, and other byproducts 10–12, the so‐called indirect reactivity. The main photocatalytic oxidation reactions are listed below in Eqs.…”

Section: Introductionmentioning

confidence: 99%

“…The main photocatalytic oxidation reactions are listed below in Eqs. 1 to 6 10, 11:

true {normale}^{-} + {normalO}_{2} \to^{•} {normalO}_{2}^{-}

true {normale}^{-} + {normalO}_{2} + 2 {normalH}^{+} \to {normalH}_{2} {normalO}_{2}

true {normale}^{-} + {normalH}_{2} {normalO}_{2} \to^{•} normalOH + normalO {normalH}^{-}

true h^{+} + {normalH}_{2} normalO \to^{•} normalOH + {normalH}^{+}

true h^{+} + normalO {normalH}^{-} \to^{•} normalOH

true \begin{matrix} left normalPollutants +^{•} normalOH +^{•} {normalO}_{2}^{-} \to normalIntermediates + normalC {normalO}_{2} + {normalH}_{2} normalO \end{matrix}

…”

Section: Introductionmentioning

confidence: 99%

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Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment

Pham

Bui

Le³

et al. 2023

Chem Eng & Technol

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N–F‐codoped TiO2 materials were successfully fabricated by a hydrothermal method without any capping agent and further heat treatment. The results indicate interstitial N3− ion doping and the surface‐adsorbed F− ion on the TiO2 surface. By introducing N and F into the TiO2 lattice, the band gap of the obtained material is significantly reduced compared to the undoped TiO2. Moreover, the light absorption ability of the material was demonstrated to extend to visible light regions, contributing to the better photocatalytic activity. Furthermore, the sample with the NH4F/TiCl4 precursor molar ratio of 2:1 displayed the greatest photocatalytic activity with visible radiation. This study provides a new pathway to synthesize a novel photocatalyst having great potential for future applications.

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“…TiO 2 catalyst has been proven to be the widely used material in several applications [ 1 , 2 ]. Due to its multi-faceted functional properties, TiO 2 is known as a promising photocatalyst material generally used in photocatalytic reactions for water treatment process [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation

HAMDI¹,

MANSOURI²,

SRIVASTAVA³

et al. 2022

Turkish Journal of Chemistry

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Cerium (Ce) and europium (Eu)-doped TiO 2 thin films were obtained by sol-gel dip-coating technique. SEM micrographs showed that the surfaces are covered by agglomerated particles due to the repeating coating process. XRD patterns showed the presence of TiO 2 anatase phase. Raman spectra revealed that the peaks recorded at 146 cm −1 (E g ) and 397 cm −1 (B 1g ) were related to the anatase phase. EIS measurements proved that Ce-TiO 2 (1wt%) and Eu-TiO 2 (0.1wt%) photocatalysts possessed a lower electron transfer resistance than pure TiO 2 , which can lead to effective separation of electron/ hole pairs during the photoreactions. The photoactivity of Ce and Eu-doped TiO 2 was investigated by the degradation of amido black10B dye (AB) under UV excitation and varying the initial pH and concentrations. It was found that Eu-TiO 2 (0.1wt%) exhibited higher photocatalytic activity, reaching a first-order reaction rate of k app (0.036min −1 ), t 1/2 was around 12 min and AB removal was 98.94%, under optimal pH of 3.5 and AB concentration of 10ppm compared to (t 1/2 = 45 min, t 1/2 =30 min), ( k app = 0.022 min −1 , k app =0.026min −1 ) and AB removal (94.78%, 96.44%), respectively for pure TiO 2 and Ce-TiO 2 (1wt%). Further increase in Eu/Ce amount up to optimal concentration (1wt% Ce and 0.1wt% Eu) led to a decrease in the AB removal. The mineralization of AB using Eu-TiO 2 photocatalyst was confirmed by HPLC analysis.

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Synergetic effect between adsorption and photodegradation on rGO/TiO2/ACF composites for dynamic toluene gaseous removal

Cited by 15 publications

References 73 publications

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment

Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation

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Synergetic effect between adsorption and photodegradation on rGO/TiO2/ACF composites for dynamic toluene gaseous removal

Cited by 15 publications

References 73 publications

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Synergistic effect of adsorption and photocatalysis for the degradation of toluene by TiO2 loaded on ACF modified by Zn(CH3COO)2

Visible Light‐Driven N–F‐Codoped TiO2 for Photocatalysts as Potential Application to Wastewater Treatment

Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation

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Product

Resources

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Visible Light‐Driven N–F‐Codoped TiO₂ for Photocatalysts as Potential Application to Wastewater Treatment