Synthesis, characterization and catalytic activity of binary metallic titanium and iron containing mesoporous silica

Wu, Yong; Zhang, Yinjie; Cheng, Jun; Zheng, Li; Wang, Haiqing; Sun, Qinglin; Han, Bing; Kong, Yan

doi:10.1016/j.micromeso.2012.04.046

Cited by 32 publications

(11 citation statements)

References 47 publications

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“…The precise experimental conditions are therefore demanding for the synthesis of bimetallic MCM-48 with regular morphology. In our previous studies, mesoporous sieves doped with vanadium exhibited high catalytic activity in the oxidation of aromatics, including benzene, styrene and phenol [ 4 , 32 , 33 , 34 , 35 , 36 , 37 ]. It was also reported that the incorporation of Fe(III) can enhance the hydrothermal stability of mesoporous sieves [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability

Wang

Chen

et al. 2015

Materials

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Spherical MCM-48 mesoporous sieve co-doped with vanadium and iron was successfully synthesized via one-step hydrothermal method. The material was characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, inductively coupled plasma (ICP), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance UV-vis spectra, and X-ray photoelectron spectra (XPS) techniques. Results indicated that the V-Fe-MCM-48 showed an ordered 3D cubic mesostructure with spherical morphology, narrow pore size distribution and high specific surface area. Most of vanadium and iron atoms existing as tetrahedral V4+ and Fe3+ species were co-doped into the silicate framework. The particle sizes of V-Fe-MCM-48 were smaller and the specific area was much higher than those of of V-MCM-48. Additionally, the synthesized V-Fe-MCM-48 exhibited improved hydrothermal stability compared with the pure MCM-48.

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Section: Introductionmentioning

confidence: 99%

Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability

Wang

Chen

et al. 2015

Materials

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“…However, the DHT method is restricted by the rigorous synthetic conditions, especially by pH value [83]. In this case, the interactions of metal species are complicate under different conditions and the simultaneous hydrolysis of multi-type metal precursors and silica resource is hardly to control, thus the synthesis of multi-heteroatoms incorporated silicate composites by this method is more difficult [84].…”

Section: In the Framework Of Omssmentioning

confidence: 99%

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

et al. 2018

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Ordered mesoporous silicas (OMSs) attract considerable attention due to their advanced structural properties. However, for the pristine silica materials, the inert property greatly inhibits their catalytic applications. Thus, to contribute to the versatile surface of OMSs, different metal active sites, including acidic/basic sites and redox sites, have been introduced into specific locations (mesoporous channels and framework) of OMSs and the metal-functionalized ordered mesoporous silicas (MOMSs) show great potential in the catalytic applications. In this review, we first present the categories of metal active sites. Then, the synthesized processes of MOMSs are thoroughly discussed, in which the metal active sites would be introduced with the assistance of organic groups into the specific locations of OMSs. In addition, the structural morphologies of OMSs are elaborated and the catalytic applications of MOMSs in the oxidation of aromatic compounds are illustrated in detail. Finally, the prospects for the future development in this field are proposed.

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“…When the micelles are organized, an inorganic component enters the hydrophilic gaps between the micelles, whereby an organic-inorganic nanohybrid structure is formed. When the organic component is thermally decomposed by heat treatment, a material having a regular mesoporous structure is synthesized [12].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Titania Thin Films and Their Photocatalytic Activity

Away

Fujii

Ban

et al. 2018

Trans. Mat. Res. Soc. Japan

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The mesoporous titania was prepared by sol gel method using titania sol and silica sol as precursor. Mesoporous titania thin film was made by removing of silica in TiO2-SiO2 composite film using HF leaching. The photocatalytic performance was studied by photodegradation methylene blue in water under UV irradiation. The volume ratio of silica and the calcination temperature influenced the photoactivity. SEM images revealed as the proportion of silica increases, the proportion of the aggregated parts increase and the crystal phase was changed. The BET surface area, pore volume and pore diameter of the TiO2-SiO2 7:3 at 700 o C were found to be 169.4 m 2 /g, 0.29 cm 3 /g and 3.8 nm, respectively. The best photocatalytic activity of mesoporous TiO2 thin films is obtained when the volume ratio of oxide TiO2-SiO2 is 7:3 and heated at 900 o C, due to the increased crystallinity of anatase and also the existance of anatase and rutile phase.

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Synthesis, characterization and catalytic activity of binary metallic titanium and iron containing mesoporous silica

Cited by 32 publications

References 47 publications

Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability

Spherical V-Fe-MCM-48: The Synthesis, Characterization and Hydrothermal Stability

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

Preparation of Mesoporous Titania Thin Films and Their Photocatalytic Activity

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