Catalytic activity of porous manganese oxides for benzene oxidation improved via citric acid solution combustion synthesis

Guo, Hongchen; Zhang, Zhixiang; Zhi, Jiang; Chen, Mingxia; Einaga, Hisahiro; Shangguan, Wenfeng

doi:10.1016/j.jes.2020.06.008

Cited by 22 publications

(25 citation statements)

References 69 publications

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“…The O 1 s XPS spectra indicate that both NiO and NiO-CNPs-CA have all oxygen species occurring at 529.3 eV, 532 eV and 533 eV assigned for O α , O β, and O γ respectively. However, CNPs present only O β and O γ (see Figure 6 b–d), the O α represents the lattice oxygen species, O β is designated for surface adsorbed oxygen species, and O γ represents the availability of adsorbed OH on the materials [ 25 ]. Figure 6 e,f present Ni 2p XPS spectra, revealing the existence of peaks at binding energies 855.5 eV and 873.4 eV representing Ni 2p 3/2 and Ni 2p 1/2 , respectively, and the separating energy is 17.5 eV.…”

Section: Resultsmentioning

confidence: 99%

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Nickel Oxide-Carbon Soot-Cellulose Acetate Nanocomposite for the Detection of Mesitylene Vapour: Investigating the Sensing Mechanism Using an LCR Meter Coupled to an FTIR Spectrometer

et al. 2022

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Nanocomposite sensors were prepared using carbon soot (CNPs), nickel oxide nanoparticles (NiO-NPs), and cellulose acetate (CA), which was used to detect and study the sensing mechanism of mesitylene vapour at room temperature. Synthesised materials were characterised using high-resolution transmission electron microscopy (HR-TEM), powder x-ray diffraction (PXRD), Raman spectroscopy, and nitrogen sorption at 77 K. Various sensors were prepared using individual nanomaterials (NiO-NPs, CNPs, and CA), binary combinations of the nanomaterials (CNPs-NiO, CNPs-CA, and NiO-CA), and ternary composites (NiO-CNPs-CA). Among all of the prepared and tested sensors, the ternary nanocomposites (NiO-CNPs-CA) were found to be the most sensitive for the detection of mesitylene, with acceptable response recovery times. Fourier-transform infrared (FTIR) spectroscopy coupled with an LCR meter revealed that the mesitylene decomposes into carbon dioxide.

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Section: Resultsmentioning

confidence: 99%

“…Furthermore, both the Ni 2P spectra have satellite peaks occurring at approximately 861 eV (Ni 2p 3/2 ) and 878.8 eV (Ni 2p 1/2 ). The positioning of the main and satellite peaks indicates the presence of Ni 2+ in both NiO and NiO-CNPs-CA composite [ 24 , 25 , 26 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

Nickel Oxide-Carbon Soot-Cellulose Acetate Nanocomposite for the Detection of Mesitylene Vapour: Investigating the Sensing Mechanism Using an LCR Meter Coupled to an FTIR Spectrometer

et al. 2022

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“…The peaks below 200 °C of H 2 O and CO 2 were due to the reaction of the adsorbed oxygen species with benzene via the Langmuir−Hinshelwood (L-H) mechanism. 34 The peaks above 300 °C were due to the reaction of the lattice oxygen species with benzene, which was associated with the Mars−van Krevelen (MvK) mechanism. 34 3.4.…”

Section: Resultsmentioning

confidence: 99%

Nanotubular OMS-2 Supported Single-Atom Platinum Catalysts Highly Active for Benzene Oxidation

et al. 2021

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The cryptomelane-type octahedral molecular sieve (OMS-2) exhibits excellent catalytic activity for the oxidation of volatile organic compounds (VOCs) due to its unique structure, and single-atom catalysts (SACs) have recently attracted much attention in heterogeneous catalysis. Herein, we adopted the hydrothermal redox reaction of KMnO4 and HCl aqueous solution at 120 °C for 12 h to first synthesize the nanotubular OMS-2 support and used the vitamin C and NaBH4 reduction methods to prepare the OMS-2-supported single-atom Pt and PtNP catalysts for benzene oxidation, respectively. It was found that the OMS-2-supported single-atom Pt catalyst with a Pt loading of 0.0383 wt % (0.0383Pt1/OMS-2) exhibited the best catalytic performance for benzene oxidation (a 90% benzene conversion was achieved at 189 °C and 20 000 mL g–1 h–1 (space velocity)), which was associated with its high surface oxygen vacancy density, good low-temperature reducibility, and strong benzene adsorption ability. It was also shown that benzene could be dissociated more readily over the supported single-atom Pt1 catalyst than over the supported PtNP catalyst, and the phenolates or benzoquinone as well as methyl groups, lipid, and vinyl species were the main intermediates in the oxidation of benzene over 0.0383Pt1/OMS-2. The results of this study are useful in developing the high-performance single-atom catalysts that can be applied for the oxidative removal of VOCs.

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“…2 show the relationship between conversion ratio and catalytic temperature for benzene over CuMn 2 /Y-Zeolite, CuMn 2 /SiO 2 , CuMn 2 /γ-Al 2 O 3 , and CuMn 2 /TiO 2 catalysts, the conversion T 10 , T 90 as well as oxidation temperature range of benzene. 40,41 The conversion ratio of low concentration benzene over CuMn 2 /SiO 2 , CuMn 2 /Y-Zeolite, CuMn 2 /γ-Al 2 O 3 , and CuMn 2 /TiO 2 decreases in turn, which is illustrated in Figure 3 and Table 2. The catalytic activity of CuMn 2 / Y-Zeolite for benzene is better than that of CuMn 2 /SiO 2 catalyst in high temperature region and benzene conversion over both of them can reach about 90% before 300 C, while CuMn 2 /TiO 2 catalyst needs more than 350 C to achieve the same conversion.…”

Section: Catalyst Characterizationmentioning

confidence: 94%

“…Figure3and Table2show the relationship between conversion ratio and catalytic temperature for benzene over CuMn 2 /Y-Zeolite, CuMn 2 /SiO 2 , CuMn 2 /γ-Al 2 O 3 , and CuMn 2 /TiO 2 catalysts, the conversion T 10 , T 90 as well as oxidation temperature range of benzene 40,41. …”

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confidence: 99%

Experimental study of volatile organic compounds catalytic combustion on Cu‐Mn catalysts with different carriers

et al. 2021

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Catalytic combustion is an effective way for volatile organic compounds harmless treatment. In this paper, the synergism between non-noble metal active phase Cu-Mn and Y-zeolite, SiO 2 , γ-Al 2 O 3 , and TiO 2 was studied by catalytic combustion experiments and corresponding characterizations; the conclusions as following: Cu-Mn/SiO 2 has the best activity and stability, T 10 and T 90 are 210 C and 298 C, respectively. Benzene can be completely oxidized below 300 C, which is due to the formation of substantial Cu-Mn solid solutions and a large number of Cu 2+ /Mn 3+ ions on the surface of SiO 2 . The activation energy of C 6 H 6 in CuMn 2 /TiO 2 is 95.50 kJ/mol, while that of the other three catalysts is close, probably 60 kJ/mol. Moreover, the stability of SiO 2 is the highest and can be maintained for more than 60 hours. The fundamental reason of catalyst deactivation is the higher diffusion resistance on the surface of the catalyst with small pore size distribution and the lack of surface oxygen, which leads to the lower degree of complete oxidation of C 6 H 6 .

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Catalytic activity of porous manganese oxides for benzene oxidation improved via citric acid solution combustion synthesis

Cited by 22 publications

References 69 publications

Nickel Oxide-Carbon Soot-Cellulose Acetate Nanocomposite for the Detection of Mesitylene Vapour: Investigating the Sensing Mechanism Using an LCR Meter Coupled to an FTIR Spectrometer

Nickel Oxide-Carbon Soot-Cellulose Acetate Nanocomposite for the Detection of Mesitylene Vapour: Investigating the Sensing Mechanism Using an LCR Meter Coupled to an FTIR Spectrometer

Nanotubular OMS-2 Supported Single-Atom Platinum Catalysts Highly Active for Benzene Oxidation

Experimental study of volatile organic compounds catalytic combustion on Cu‐Mn catalysts with different carriers

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