A strawsheave-like metal organic framework Ce-BTC derivative containing high specific surface area for improving the catalytic activity of CO oxidation reaction

Zhang, Xiaodong; Hou, Fulin; Li, Hongxin; Yang, Yang; Wang, Yuxin; Liu, Ning; Yang, Yiqiong

doi:10.1016/j.micromeso.2017.10.019

Cited by 181 publications

(69 citation statements)

References 39 publications

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“…have been extensively studied as catalysts for the removal of VOCs because they are inexpensive and plentiful. [16][17][18][19][20][21][22][23] Tricobalt tetraoxide (Co 3 O 4 ), one of the most promising materials, has been used in catalytic oxidation, lithium-ion batteries as energy storage materials, sensor devices and other important fields. [24][25][26][27][28] A number of studies have focused on Co 3 O 4 for the catalytic oxidation of VOCs due to its high catalytic activity, low cost and environmental benignity.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Yang

et al. 2019

ChemCatChem

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A double‐sided nanobrush Co3O4 (Co3O4−B) catalyst was successfully prepared by a hydrothermal method for the first time, and Co3O4 rods (Co3O4−R), Co3O4 hexagonal plates (Co3O4−H) and Co3O4 double‐sided helianthus discs (Co3O4−D) were also synthesized through tuning the water/ethanol ratio. Among all of the as‐prepared catalysts, the Co3O4−B catalyst exhibited the best catalytic activity for benzene oxidation. The excellent catalytic performance could be attributed to the surface abundance Co3+ species, good low‐temperature reducibility and high number of lattice defects with substantial active oxygen species, which resulted from the unique structure of the double‐sided nanobrush. The stability and water tolerance tests demonstrated that the Co3O4−B catalyst displays excellent stability for benzene combustion, and the deactivation caused by water vapor is also reversible. It is concluded that the unique structure of the catalysts plays a crucial role in determining its catalytic oxidation performance.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Yang

et al. 2019

ChemCatChem

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“…The calculation also showed that the value of the constant k 6 in Equation (21) in all catalysts is zero, or the term k 6 P xyl P H2O 0.5 = 0, meaning that no by-products inhibited the reaction. Indeed, by-products formed during PCO of pxylene were analyzed directly from the reaction gas mixture and showed that they are presented as traces.…”

Section: A Reaction Rate Is Proportional To Light Intensitymentioning

confidence: 88%

“…Owing to high specific surface area and pore volume, uniform pores, and chemical tenability, metal-organic frameworks (MOFs) have attracted attention in various fields, 14 especially in adsorption and separation of gas, [15][16][17] catalysis for VOCs removal, 18 and CO oxidation. [19][20][21][22][23] MOFs have been known as semiconductors due to its optical transition, electrochemical, and photochemical activity. 24,25 There are several researches using the MOF as a photocatalyst for the decomposition of organic compounds in the aqueous phase.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Thuy¹,

Lộc

Tri³

et al. 2019

Int J of Chemical Kinetics

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The thin film photocatalysts were prepared from solvothermal UiO‐66‐NH2 and sol‐gel perovskite LaFeO3 by a dip‐coating technique. The properties of obtained catalysts were investigated by the methods of Brunauer‐Emmett‐Teller adsorption, XRD, SEM, FT‐IR, TGA, and UV‐vis spectroscopies. The results proved that the thin film of the thickness of 4.2 and 4.7 µm was successfully prepared from micro‐mesoporous UiO‐66‐NH2 and LaFeO3 nanocrystals. Possessing small crystals (9‐35 nm) and the band gap energy of 2.83 and 1.92 eV, respectively, UiO‐66‐NH2 and LaFeO3 are shown to be a highly active visible‐light photocatalyst for photodegradation of p‐xylene‐contained gas. The kinetics of photocatalytic degradation of p‐xylene under combined illumination of ultraviolet and visible lights over obtained UiO‐66‐NH2 and LaFeO3 thin films were carried out in a gradientless flow circulating system at room temperature and atmospheric pressure. The results showed that the Langmuir‐Hinshelwood kinetic model was successfully applied to correlate the obtained data. The kinetics of the reaction on both catalysts were found to be written by the fractional equation, describing the dependence of the reaction rate on the concentration of p‐xylene, oxygen molecules, dissociative adsorbed water vapor, the photon flux, and the inhibition of CO2 product. It implies that the reaction occurred at high surface coverages, molecular p‐xylene, and oxygen participated in the reaction in the form of surface molecular; water—in the forms of •OH and H+. Although there is a general kinetic equation for reaction on various catalysts, the different affinities of the catalysts with the compounds present in the reaction create the kinetic feature of the reaction on each catalyst. Because of the high affinity of catalysts with water vapor, the given reactant increased the rate of p‐xylene photocatalytic degradation at low concentration but inhibited it in the high concentration region. The adsorption affinity of LaFeO3 to oxygen is higher compared to UiO‐66‐NH2; then, there was an optimum concentration of oxygen in the photodegradation of p‐xylene on the former, whereas in the latter monotonically increasing relationship was found.

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“…The presence of manganese oxide is likely to facilitate the reduction of copper oxide, involving coordination between CuO and MnO 2 , the manganese oxide acting as an oxygen donor and copper oxide acting as the oxygen acceptor. A previous work demonstrated that the presence of Cu 2+ and Mn 3+ is essential for the high catalytic activity of CuMnOx catalyst [33,34]. In present study, the different types of precursors have been used to change the crystalline phase of the catalysts and to find out the best CuMnOx catalyst, which will give the highest activity for CO oxidation.…”

Section: Introductionmentioning

confidence: 95%

The choice of precursors in the synthesizing of CuMnOx catalysts for maximizing CO oxidation

2018

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The hopcalite (CuMnOx) catalyst is a well-known catalyst for CO oxidation at a low temperature and it is synthesized by the co-precipitation method with different types of precursors. Activity of the CuMnOx catalysts for CO oxidation is strongly dependent upon the combination of precursors, ranking in order {Mn(Ac) 2 + Cu(NO 3 ) 2 } > {Mn(Ac) 2 + Cu(Ac) 2 } > {Mn(N O 3 ) 2 + Cu(NO 3 ) 2 } > {Mn(NO 3 ) 2 + Cu(AC) 2 }. All the precursors were precipitated by KMnO 4 solution and the precursors mostly comprised of MnO 2 , Mn 2 O 3 and CuO phases. Keeping the same precipitant while changing the precursors caused a change in the lattice oxygen mobility which influenced the CO oxidation activity. The calcination strategy of the precursors has great influence on the activity of resulting catalysts. The reactive calcination (RC) conditions produce multifarious phenomena of CO oxidation and the precursor decomposition in a single-step process. The activity order of the catalysts for CO oxidation was as follows: reactive calcination (RC) > flowing air > stagnant air. Therefore, we recommended that the RC route was the more appropriate calcination route for the production of highly active CuMnOx catalysts. All the catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectroscopy and scanning electron microscopy technique. The influence of precursors on the structural properties and the catalytic activity of co-precipitation derived binary CuMnOx catalysts for CO oxidation has been investigated.

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A strawsheave-like metal organic framework Ce-BTC derivative containing high specific surface area for improving the catalytic activity of CO oxidation reaction

Cited by 181 publications

References 39 publications

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

The choice of precursors in the synthesizing of CuMnOx catalysts for maximizing CO oxidation

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A strawsheave-like metal organic framework Ce-BTC derivative containing high specific surface area for improving the catalytic activity of CO oxidation reaction

Cited by 181 publications

References 39 publications

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH2 and LaFeO3 thin films under combined illumination of ultraviolet and visible lights

The choice of precursors in the synthesizing of CuMnOx catalysts for maximizing CO oxidation

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Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Hydrothermal Synthesis of a Novel Double‐Sided Nanobrush Co₃O₄ Catalyst and Its Catalytic Performance for Benzene Oxidation

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights