The utilization of dye wastewater in enhancing catalytic activity of CeO2-TiO2 mixed oxide catalyst for NO reduction and dichloromethane oxidation

Zeng, Yiqing; Wang, Song; Wang, Yanan; Meng, Yahan; Song, Fujiao; Zhang, Shule; Zhong, Qin

doi:10.1016/j.chemosphere.2019.07.031

Cited by 17 publications

(7 citation statements)

References 61 publications

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“…found that similar enhancement can be obtained by treating Ce−Ti sample with desired aqueous hydrochloric acid solution [97] . Since CeO 2 −TiO 2 sample is also a good photocatalyst, thus we have adopted a photo‐treatment to enhance its NH 3 −SCR activity [21b,98] . For CeO 2 /TiO 2 catalyst, photo‐treatment can induce a stronger interaction between CeO 2 and TiO 2 and the formation of new oxygen vacancies and Ce 3+ ions [21b] .…”

Section: Methods In Improving the Catalytic Activity Of Ceo2−tio2 Catmentioning

confidence: 64%

“…These improvements enhance the redox properties and surface acidity of CeO 2 /TiO 2 catalyst, which leads to superior NH 3 −SCR activity of photo‐treated CeO 2 /TiO 2 catalyst. As to the effect of photo‐treatment on Ce−Ti mixed oxides, it increases the amount of surface Ce 3+ ions, which induces a large number of Ce−O v −Ti (oxygen vacancy (O v ) in Ce−O−Ti short range structure) defects that can improve the redox properties and surface acidity, eventually enhances the NH 3 −SCR activity of Ce−Ti samples [98] …”

Section: Methods In Improving the Catalytic Activity Of Ceo2−tio2 Catalystmentioning

confidence: 99%

“…As to the effect of phototreatment on CeÀ Ti mixed oxides, it increases the amount of surface Ce 3 + ions, which induces a large number of CeÀ O v À Ti (oxygen vacancy (O v ) in CeÀ OÀ Ti short range structure) defects that can improve the redox properties and surface acidity, eventually enhances the NH 3 À SCR activity of CeÀ Ti samples. [98]…”

Section: Pretreatmentmentioning

confidence: 99%

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Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

et al. 2020

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Selective catalytic reduction of NOx with NH3 (NH3−SCR) is one of the widely used process to abate NOx emission from both stationary and mobile sources. Recently, CeO2−TiO2 based NH3−SCR catalysts due to their excellent medium and high temperature activities, high N2 selectivity and environmentally friendly, have attracted much attention as great candidate to replace the commercial VOx−TiO2 based NH3−SCR catalysts. During the past years, extensive works have been done to achieve the industrial commercialization of CeO2−TiO2 based NH3−SCR catalyst. In this review, we summarize the recent studies on the mechanism, deactivation, preparation and modification of CeO2−TiO2 catalyst. The focus of this review is the modification strategies on improving the catalytic performance of CeO2−TiO2 catalyst. By comparing the effect of different modification strategies on the catalytic performance of CeO2−TiO2 catalyst, the perspectives and challenges of CeO2−TiO2 based catalyst for NH3−SCR of NOx are discussed.

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Section: Methods In Improving the Catalytic Activity Of Ceo2−tio2 Catmentioning

confidence: 64%

Section: Methods In Improving the Catalytic Activity Of Ceo2−tio2 Catalystmentioning

confidence: 99%

Section: Pretreatmentmentioning

confidence: 99%

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Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

et al. 2020

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“…[10] The peak located at 148 cm À 1 is gradually blue shifted with the increasing of CeO 2 , this indicates the presence of lattice disorder resulting from oxygen vacancies in CeO 2 -TiO 2 hybid-nanotubes. [11] The relative peaks intensity of the 196 cm À 1 for Pt-in-(CeO 2 ) x (TiO 2 ) 1-x NT are higher than that of Pt-in-TiO 2 NT. This suggest that TiO 2 microstructure is slightly changed after Ce addition.…”

Section: Resultsmentioning

confidence: 91%

CeO₂‐TiO₂ Hybid‐Nanotubes with Tunable Oxygen Vacancies as the Support to Confine Pt Nanoparticles for the Low‐Temperature Water‐Gas Shift Reaction

Chen

et al. 2021

ChemistrySelect

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Reducible oxides as supports have been demonstrated to improve the activity of Pt catalysts towards water‐gas shift (WGS) reaction. The Pt species anchored by the oxygen vacancies derived from these supports play as catalytic sites during low‐temperature WGS reaction. Herein, we introduced CeO2 to modify TiO2 nanotubes (TiO2NT) and prepared CeO2‐TiO2 hybid‐nanotubes ((CeO2)x(TiO2)1‐xNT, x=0.2, 0.4, 0.6) to confine Pt nanoparticles (NPs) as the efficient catalysts for the low‐temperature WGS reaction. Pt NPs confined in (CeO2)x(TiO2)1‐xNT catalysts exhibit higher WGS activity than that of the Pt NPs entrapped in pure TiO2NT (Pt‐in‐TiO2NT) and Pt/CeO2 catalysts throughout the entire reaction temperature range. Activity measurements coupled with the physicochemical characterization of catalysts suggest that the redox ability of PtOx species is positive correlated with WGS activity and oxygen vacancy adjacent to Pt (Pt‐Ov) serves as the active site for H2O dissociation and CO oxidation in WGS reaction.

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“…12,13 It was found that the addition of cerium to TiO 2 has attracted huge attention due to its large oxygen storage capacity and Ce 3+ ↔ Ce 4+ redox properties, resulting in improved active sites suitable for the selective oxidation of hydrocarbons. 14−16 Therefore, CeO 2 − TiO 2 has been extensively studied for the oxidation of ammonia, 17 dichloromethane, 18 and volatile organic compounds, 19,20 but it is not common for cyclohexane oxidation. The use of such a CeO 2 −TiO 2 catalyst for the liquid phase oxidation reaction can also show difficulty in the recovery of CeO 2 −TiO 2 catalyst from the liquid medium.…”

Section: Introductionmentioning

confidence: 99%

CeO₂–TiO₂ Nanoparticle-Grafted gC₃N₄ Sheets as an Efficient Catalyst for the Oxidation of Cyclohexane to KA oil

Arumugam

Singh

Tathod

et al. 2022

Ind. Eng. Chem. Res.

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Here, we report a sustainable catalytic process operating on CeO2–TiO2 nanoparticle-grafted gC3N4 sheets (gC3N4/CeO2–TiO2) in the presence of a H2O2 green oxidant for the liquid phase oxidation of cyclohexane to produce KA oil (cyclohexanone + cyclohexanol). The process achieved enhanced cyclohexane conversion (62%) toward 95% KA oil (cyclohexanone 83% + cyclohexanol 12%), which is the highest ever reported to the best of our knowledge. The excellent catalytic behavior of gC3N4/CeO2–TiO2 in the present study due to its enhanced active sites, that is, Ce3+ and Ti3+, is facilitated by the redox reaction between CeO2–TiO2 and gC3N4 sheets. The high stability of gC3N4/CeO2–TiO2 catalyst in the liquid phase reaction study indicates the robust nature of this catalyst facilitated by strong interactions between CeO2–TiO2 species and electron-rich sites (N and π) of gC3N4 sheets. The overall study suggests that the gC3N4/CeO2–TiO2 material can be a promising catalyst for the sustainable production of KA oil from cyclohexane oxidation in the presence of the H2O2 oxidant.

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The utilization of dye wastewater in enhancing catalytic activity of CeO2-TiO2 mixed oxide catalyst for NO reduction and dichloromethane oxidation

Cited by 17 publications

References 61 publications

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

CeO₂‐TiO₂ Hybid‐Nanotubes with Tunable Oxygen Vacancies as the Support to Confine Pt Nanoparticles for the Low‐Temperature Water‐Gas Shift Reaction

CeO₂–TiO₂ Nanoparticle-Grafted gC₃N₄ Sheets as an Efficient Catalyst for the Oxidation of Cyclohexane to KA oil

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The utilization of dye wastewater in enhancing catalytic activity of CeO2-TiO2 mixed oxide catalyst for NO reduction and dichloromethane oxidation

Cited by 17 publications

References 61 publications

Recent Progress of CeO2−TiO2 Based Catalysts for Selective Catalytic Reduction of NOx by NH3

Recent Progress of CeO2−TiO2 Based Catalysts for Selective Catalytic Reduction of NOx by NH3

CeO2‐TiO2 Hybid‐Nanotubes with Tunable Oxygen Vacancies as the Support to Confine Pt Nanoparticles for the Low‐Temperature Water‐Gas Shift Reaction

CeO2–TiO2 Nanoparticle-Grafted gC3N4 Sheets as an Efficient Catalyst for the Oxidation of Cyclohexane to KA oil

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Product

Resources

About

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

CeO₂‐TiO₂ Hybid‐Nanotubes with Tunable Oxygen Vacancies as the Support to Confine Pt Nanoparticles for the Low‐Temperature Water‐Gas Shift Reaction

CeO₂–TiO₂ Nanoparticle-Grafted gC₃N₄ Sheets as an Efficient Catalyst for the Oxidation of Cyclohexane to KA oil