MoS2 supported on P25 titania: A model system for the activation of a HDS catalyst

Signorile, Matteo; Damin, Alessandro; Budnyk, Andriy P.; Lamberti, Carlo; Puig-Molina, A.; Beato, Pablo; Bordiga, Silvia

doi:10.1016/j.jcat.2015.01.012

Cited by 35 publications

(20 citation statements)

References 75 publications

(96 reference statements)

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“…4b), the anatase TiO 2 active Raman modes concluding the 3E g Raman modes were located at 155.7 cm −1 , 215.0 cm −1 , and 640.1 cm −1 , 2B 1g located at 395.3 cm −1 and 514.7 cm −1 , as well as the A 1g located at 514.7 cm −1 . the position of 375.3 cm −1 and 411.8 cm −1 was speculated for the A 1g and E 1 2g vibrational modes of MoS 2 , respectively, which are consistent with previous results [35,36]. Besides, the modest peak located at 204.5 cm −1 was observed, which was attributed to the Raman mode of MoO 3 .…”

Section: Raman and Xps Analysis Of The Photocatalystsupporting

confidence: 90%

Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Zhang

Xiao

Zheng

et al. 2015

Applied Surface Science

136

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Section: Raman and Xps Analysis Of The Photocatalystsupporting

confidence: 90%

Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Zhang

Xiao

Zheng

et al. 2015

Applied Surface Science

136

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“…As can be seen from Figure 4a, the intense main peak observed at 2179 cm −1 can be explained by the building up of lateral interactions among an array of parallel CO oscillators, adsorbed on Ti 4+ sites on flat (101) surfaces [41], while that at 2155 cm −1 is due to CO molecules interacting by hydrogen bonds with residual OH groups. The main band, in the 2178 cm −1 -2192 cm −1 range (Figure 4a), undergoes a frequency shift upon decreasing CO pressure, due to the changing of the lateral interactions between CO oscillators on the TiO 2 surface [43,44]. Notice that a higher frequency shift is indicative of a highly regular and extended face.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Sulfur-Doped TiO2: Structure and Surface Properties

et al. 2017

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A comprehensive study on the sulfur doping of TiO 2 , by means of H 2 S treatment at 673 K, has been performed in order to highlight the role of sulfur in affecting the properties of the system, as compared to the native TiO 2 . The focus of this study is to find a relationship among the surface, structure, and morphology properties, by means of a detailed chemical and physical characterization of the samples. In particular, transmission electron microscopy images provide a simple tool to have a direct and immediate evidence of the effects of H 2 S action on the TiO 2 particles structure and surface defects. Furthermore, from spectroscopy analyses, the peculiar surface, optical properties, and methylene blue photodegradation test of S-doped TiO 2 samples, as compared to pure TiO 2 , have been investigated and explained by the effects caused by the exchange of S species with O species and by the surface defects induced by the strong H 2 S treatment.

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“…It has been demonstrated that the HDS performance of the catalysts can be improved by designing novel carriers with high hydrogenation capacity and suitable MSI [23][24][25][26][27]. Recently, a new class of mesoporous materials, dendritic mesoporous silica nanoparticles (DMSNs), were synthesized, which showed a high potential on the applications in gene/protein/drug delivery or storage, medical, disease diagnosis and heterogeneous catalysis because of their center-radial pore structures, short…”

Section: Introductionmentioning

confidence: 99%

Dendritic micro–mesoporous composites with center-radial pores assembled by TS-1 nanocrystals to enhance hydrodesulfurization activity of dibenzothiophene and 4,6-dimethyldibenzothiophene

Wang

Xiao

Zheng

et al. 2020

Journal of Catalysis

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A novel dendritic composite (TD) with an open center-radial pore structure using TS-1 nanocrystals as microporous precursors were synthesized successfully by a facile method. TS-1 nanocrystals were embedded into the framework of dendritic mesoporous silica nanospheres (DMSNs) to form Si-O-Ti bonds, which was beneficial to generate more S vacancies of MoS2 active phases. NiMo/TD-2 catalyst had a larger surface area and higher metal-support-interaction (MSI), resulting in a higher sulfidation and dispersion degrees of MoS2 active phases over the sulfided NiMo/TD-2 catalyst, which was consequently favored to improve the HDS activity of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). Furthermore, the NiMo/TD-2 catalyst with SiO2/TiO2 molar ratio of 150 exhibited higher hydrodesulfurization (HDS) performances of DBT and 4,6-DMDBT than other NiMo/TD catalysts and the commercial NiMo/Al2O3 catalyst. Moreover, the NiMo/TD-2 catalyst possessed higher Brønsted (B) and lewis (L) acid sites, thus promoted the hydrogenation (HYD) of DBT and the isomerization (ISO) of 4,6-DMDBT.

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MoS2 supported on P25 titania: A model system for the activation of a HDS catalyst

Cited by 35 publications

References 75 publications

Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Fabrication of TiO2/MoS2@zeolite photocatalyst and its photocatalytic activity for degradation of methyl orange under visible light

Sulfur-Doped TiO2: Structure and Surface Properties

Dendritic micro–mesoporous composites with center-radial pores assembled by TS-1 nanocrystals to enhance hydrodesulfurization activity of dibenzothiophene and 4,6-dimethyldibenzothiophene

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