Catalytic Oxidation of Chlorobenzene over MnO x /Al2O3-carbon Nanotubes Composites

Fan, Xiaoyu; Yang, Hangsheng; Tian, Wei; Nie, Anmin; Hou, Tianfeng; Qiu, Fuming; Zhang, Xiaobin

doi:10.1007/s10562-010-0450-9

Cited by 39 publications

(23 citation statements)

References 27 publications

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“…A support with a high BET surface area can effectively generate more surface active sites and promote charge transfer, which is benecial for the catalytic performance. 21,46 Based on the XRD and N 2 adsorption results, it is most likely that the decreased catalytic efficiency of the decomposed sample can be attributed to the crushed special structure and the decreased surface area of the catalyst. From the comparative experimental results, the MOF was proven to be a potential supporting material for the impregnated Mn-Ce catalysts.…”

Section: Catalytic Performances Of the Decomposed Catalystsmentioning

confidence: 99%

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

et al. 2017

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aMn and Ce were loaded on metal-organic frameworks (MOFs) via impregnation and in situ doping methods. The catalytic capacities of the obtained composite materials were evaluated in the selective catalytic reduction (SCR) of NO. The existing form of Mn-Ce in the MOF originates from different doping methods and its effect on the catalytic performance was investigated. Mn-Ce introduced by impregnation was deposited on the surface of the MOF and exhibited high catalytic efficiency of more than 98% from 200 C to 300 C. According to the results of BET, XRD, XPS, and ICP analyses, it was concluded that Mn-Ce introduced via the in situ doping method was inserted in the crystal lattice structure of the MOF, which resulted in an enlarged surface area, low Mn concentration, and poor redox property as compared to that introduced via the impregnated method. By exploring these factors, it was proven that the limited redox ability was the direct reason that resulted in the low activity of the MnCeMOF. Using thermal decomposition, the in situ doped Mn-Ce was liberated from the MnCeMOF crystal lattice and subsequently, exhibited recovered redox properties and catalytic activity. In this study, we proved that different doping methods lead to different forms of Mn-Ce in the MOF, which exhibit different redox properties and thus directly lead to different catalytic performance.

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Section: Catalytic Performances Of the Decomposed Catalystsmentioning

confidence: 99%

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

et al. 2017

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“…In addition, CNTs are also good NO X adsorbents [21] and have a positive effect on the elimination of organic pollution [22,23]. This study reports the reduction of NO X with ammonia over the V 2 O 5 -MnO X /TiO 2 -CNTs plate-like catalyst in a fixed-bed flow-reactor.…”

Section: Introductionmentioning

confidence: 92%

Catalytic Reduction of NO with NH3 over V2O5-MnOX/TiO2-Carbon Nanotube Composites

Yang

Nie

et al. 2011

Catal Lett

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A series of V 2 O 5 -MnO X /TiO 2 -CNTs, V 2 O 5 / TiO 2 -CNTs, and MnO X /TiO 2 -CNTs catalysts were synthesized via solvothermal method and their NO X removal activities were studied. A catalytic performance improvement was observed over catalysts prepared by mechanical mixing MnO X /TiO 2 -CNTs and V 2 O 5 /TiO 2 -CNTs. XRD, SEM, EDS, TPD, TPR, and BET were employed to analyze the improvement which is ascribed to the separation of Mn and V as well as the increase in reducibility and acidic strength.

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“…Nitric oxide (NO) exhausted from waste incinerators, industrial boilers, engines, and automobiles can cause photochemical smog, acid rain, greenhouse effect and haze weather, which are harmful to the ecosystem and humanity [1][2][3][4][5] . Therefore, strict control of nitric oxide emission and removal processes was urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and performance of ternary doped Cu–Ce–B/TiO₂ nanotubes on the photocatalytic removal of nitrogen oxides

Chen

2015

New J. Chem.

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A series of single doped, co-doped and tri-doped TiO2 nanotubes with Cu, Ce and B have been successfully prepared by hydrothermal method assisted by cetyl trimethyl ammonium bromide (CTAB). The photoelectrochemical properties of as-prepared samples were characterized by X-ray diffraction (XRD), transmissions electron microscopy (TEM), UV-vis absorbance spectroscopy, photoluminescence spectroscopy (PL), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The doped TiO2 nanotubes (TNTs) with different amounts of Cu, Ce and B were evaluated by the removal of nitride oxide under the irradiation of UV lamp to optimize the best doping concentration. The results show that Cu, Ce and B tri-doped TNTs exhibit the highest photocatalytic activity, which should be ascribed to the synergetic effect of narrowing the band-gap of TiO2, which greatly inhibits the recombination of electrons and holes.The possible mechanism of photocatalytic reaction was also proposed. 3 recombination of electron/holes pairs. In addition the C-N-codoping can decrease the ban-gap energy and promote the adsoption of visible light. Changlin Yu et al. [21] also reported that the Ag/TiO2-B nanosquares has the high photocatalytic performance which should be attributed to the synergistic effects of B doping that narrows the band gap and the SPR of silver nanoparticles contribute to the highest activity. Furthermore, the single F or Ce-doped TiO2 and the novel porous F, Ce-codoped TiO2 have shown good mesoporous structures and the F, Ce-codoped TiO2 exhibits much higher photocatalytic activity than pure and the single F or Ce-doped TiO2. It was attributed that F doping which could produce more hydroxyl radicals inhibited the recombination of the photoinduced electrons and holes and Ce doping cause the wavelength response range of TiO2 to the long wavelength region. [22] Compared with other nonmetals, the radius of the boron atom is very small and can site at an interstitial position, which replaces an O atom inducing some gap states close to the bottom of the conduction band, and thus leading to its visible light response activity.Furthermore, great efforts have been devoted to prohibit the recombination of the photo-generated electrons and holes pairs. Transition metals and rare earths were the most promising candidates because of the possible transition of d and f orbital electrons, which can effectively reduce the recombination rate of electron-hole pairs and improve photo quantum yield. Transition metals such as Fe [23] , W [24] , Ag [25] , Pt [26] , Cu [27] and Zn [28] etc. were doped, which can introduce new energy levels to narrow its band gap. Out of all transition metals, copper ions as dopant attracted special attention due to copper species including Cu2O and CuO can serve as the trap for charge 5 through a hydrothermal method, which was assisted by CTAB to modify the surface character of TiNTs to form mesopores on the shells [35] . The influence of Cu, Ce and B on the phy...

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Catalytic Oxidation of Chlorobenzene over MnO x /Al2O3-carbon Nanotubes Composites

Cited by 39 publications

References 27 publications

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

Catalytic Reduction of NO with NH3 over V2O5-MnOX/TiO2-Carbon Nanotube Composites

Synthesis, characterization and performance of ternary doped Cu–Ce–B/TiO₂ nanotubes on the photocatalytic removal of nitrogen oxides

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Catalytic Oxidation of Chlorobenzene over MnO x /Al2O3-carbon Nanotubes Composites

Cited by 39 publications

References 27 publications

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

A comparative study of manganese–cerium doped metal–organic frameworks prepared via impregnation and in situ methods in the selective catalytic reduction of NO

Catalytic Reduction of NO with NH3 over V2O5-MnOX/TiO2-Carbon Nanotube Composites

Synthesis, characterization and performance of ternary doped Cu–Ce–B/TiO2 nanotubes on the photocatalytic removal of nitrogen oxides

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Product

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Synthesis, characterization and performance of ternary doped Cu–Ce–B/TiO₂ nanotubes on the photocatalytic removal of nitrogen oxides