Pt and Ni Nanoparticles Anchored into Metal–Organic Frameworks MIL-101 (Cr) as Swift Catalysts for Ethanol Dehydration

Gobara, Heba M.; Mohamed, Rasha S.; Hassan, Salah A.; Khalil, F. H.; El-Sall, Mohamed S.

doi:10.1007/s10562-016-1826-2

Cited by 22 publications

(9 citation statements)

References 49 publications

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“…The XRD pattern of MIL-101(Cr) shown in Fig. 1a reveals the characteristic peaks below 25º of 2θ [31,58]. Above this value, intense peaks not assigned to the MIL-101(Cr) compound are also detected and ascribed to the α-CrOOH phase, thus suggesting the presence in the pristine MOF of a Cr oxy-hydroxide impurity [58].…”

Section: Resultsmentioning

confidence: 97%

“…1a reveals the characteristic peaks below 25º of 2θ [31,58]. Above this value, intense peaks not assigned to the MIL-101(Cr) compound are also detected and ascribed to the α-CrOOH phase, thus suggesting the presence in the pristine MOF of a Cr oxy-hydroxide impurity [58]. After heating at 600 °C under N 2 only peaks belonging to the α-Cr 2 O 3 phase are detected, while the typical peak of C assigned to (002) planes is not detected at 26.5º of 2θ, thus indicating its amorphous nature ascribed to a mild calcination temperature [59].…”

Section: Resultsmentioning

confidence: 99%

“…The SEM image of the MOF precursor reported for comparison in Fig. 3a reveals particles having the typical pseudooctahedral morphology of MIL-101(Cr) with size ranging between 100 nm and 200 nm, in addition to other particles characterized by a more irregular morphology most likely ascribed to the α-CrOOH [58]. In spite, the SEM of the Cr 2 O 3 @C composite (Fig.…”

Section: Figurementioning

confidence: 94%

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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“…2 and Table 1. All isotherms are similar to CNTs (the mother sample) and classified to kind II according to IUPAC types [35][36][37][38][39]. The N2 was taken at minimal relative pressure P/Po, indicating the micropore filling from adsorbentadsorbate interaction and is distinct from the adsorption in micropore multilayer, which ascribed to the multilayer adsorption.…”

Section: Surface Area Measurementmentioning

confidence: 99%

Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

2020

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The photocatalytic degradation of congo red dye (CR) using nanocomposites materials of multi-walled carbon nanotubes combined with some transition metal oxide under visible light irradiation was studied. Multi-walled carbon nanotubes were prepared via chemical vapour synthesis (CVS) and loaded with some transition elements as Cu, Zn, and Cu0.1Zn0.9O nanoparticles, where the ratio of metal was kept constant in all catalysts (20% M). Various Characteristic techniques were adopted such as X-Ray Diffraction (XRD), Nitrogen adsorption-desorption, Transmission Electron Microscope (TEM), Fourier Transform Infra-Red (FT-IR), Ultra Violet reflectance analysis (UV), Scanning Electron Microscope (SEM), Energy dispersive X-ray Spectroscopy (EDX), Photoluminescence (PL) spectroscopy and Raman spectroscopy. The results proved that the mother carbon nanotubes have a high surface area and total pore volume and are found to be 247m 2 /g and 0.569 cm 3 /g, respectively, and its surface area decreased upon loading the metal nanoparticles. Pore size distribution curve (PSD) exhibited a wide mesopore centered at 30 nm. TEM results revealed that Cu and Zn metals are randomly distributed and located at the nanotube's surface and the tips of the tube via the tip-growth mechanism. It is seen that the Zn/CNTs have a homogenously uniform diameter as compared to the neat CNTs. The nanocomposites' photodegradation% rank was Zn/CNT > Cu/CNT > Cu-Zn/CNT, which related mainly to the chemical composition of Zn/CNT composite. Zn/CNT composite showed the highest degradation efficiency among the prepared composites, which achieved 97.7% after 70 minutes under visible light irradiation. The mechanism of the photocatalytic degradation of congo red dye under visible light irradiation was discussed.

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“…Gobara et al reported significant activity of MIL-101(Cr) catalyst in dehydration of ethanol to ethene with 26% yield at 300 °C and improved yields in the case of M@MIL-101(Cr) composites (where M = Ni, Pt). [70].…”

Section: *-R Denotes Sample After Reaction Testmentioning

confidence: 99%

Efficient oxidative dehydrogenation of ethanol by VOx@MIL-101: On par with VOx/ZrO2 and much better than MIL-47(V)

et al. 2019

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The possibility to apply metal organic framework (MOF) based catalysts for oxidation reaction in gas phase was explored. Catalytic activity of the vanadium oxide catalyst incorporated in MIL-101(Cr) as support was investigated in gas phase ethanol oxidative dehydrogenation (EtOH-ODH) and compared to that of MIL-47(V) metal organic framework material containing vanadium as central metal in the framework structure and to a classical VOx/ZrO2 supported vanadium oxide catalyst. It was found that vanadium species, incorporated in MIL-101(Cr) support by a variant of vapor deposition method, are stabilized in the form of well dispersed VOx species (no vanadium pentoxide clusters was detected in the catalyst). The obtained VOx@MIL-101(Cr) catalyst exhibited high selectivity towards acetaldehyde (up to 99%) at reaction temperatures not exceeding 200°C. The catalytic activity of VOx@MIL-101(Cr) catalyst reached an activity level comparable to that of the classical VOx/ZrO2 catalyst, but the specific productivity of acetaldehyde (3 kgAA kgcat-1 h-1) was higher by 75% compared with productivity on VOx/ZrO2 due to much higher content of vanadium species, which could be hosted by the MOF. On the other hand, MIL-47(V) catalyst exhibited negligible activity seemingly due to coordinatively saturated character of the vanadium centers and/or too high stability of the V IV oxidation state. This proof-of-concept study proved that application of MOF materials as host matrices for heterogeneous catalysts aiming oxidation reaction in gas phase could be efficient as demonstrated on the example of oxidative dehydrogenation of ethanol.

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Pt and Ni Nanoparticles Anchored into Metal–Organic Frameworks MIL-101 (Cr) as Swift Catalysts for Ethanol Dehydration

Cited by 22 publications

References 49 publications

Porous Cr2O3@C composite derived from metal organic framework in efficient semi-liquid lithium-sulfur battery

Porous Cr2O3@C composite derived from metal organic framework in efficient semi-liquid lithium-sulfur battery

Photocatalytic Degradation of Congo Red Dye via Multi-Walled Carbon Nanotubes Modified CuO and ZnO Nanoparticles under Visible Light Irradiation

Efficient oxidative dehydrogenation of ethanol by VOx@MIL-101: On par with VOx/ZrO2 and much better than MIL-47(V)

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