scholarly journals The design, synthesis and catalytic performance of vanadium-incorporated mesoporous silica with 3D mesoporous structure for propene epoxidation

RSC Advances ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 10144-10154
Author(s):  
Agnieszka Held ◽  
Ewa Janiszewska ◽  
Justyna Czerepińska ◽  
Jolanta Kowalska-Kuś
Keyword(s):  
Mesoporous Silica ◽  
3D Structure ◽  
Mesoporous Structure ◽  
Catalytic Performance ◽  
Design Synthesis ◽  
Vanadium Catalysts

Novel promising vanadium catalysts based on mesoporous silica of 3D structure, namely KIT-6, SBA-12, and MCF, for the direct propene epoxidation with N2O.

scholarly journals Synthesis and catalytic performance in the propene epoxidation of a vanadium catalyst supported on mesoporous silica obtained with the aid of sucrose

2017 ◽  
Vol 41 (8) ◽  
pp. 2955-2963
Author(s):  
Ewa Janiszewska ◽  
Stanislaw Kowalak
Keyword(s):  
Mesoporous Silica ◽  
Propylene Oxide ◽  
Catalytic Performance ◽  
Vanadium Catalyst ◽  
Vanadium Catalysts

Sucrose is an effective template for mesoporous silica—an efficient support of vanadium catalysts, active in propene epoxidation to propylene oxide.

Design, synthesis and catalytic performance of vanadium-incorporated mesoporous silica KIT-6 catalysts for the oxidative dehydrogenation of propane to propylene

2016 ◽  
Vol 6 (15) ◽  
pp. 5927-5941 ◽  
Author(s):  
Qinglong Liu ◽  
Jianmei Li ◽  
Zhen Zhao ◽  
Manglai Gao ◽  
Lian Kong ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Hydrothermal Method ◽  
Oxidative Dehydrogenation ◽  
Catalytic Performance ◽  
Oxidative Dehydrogenation Of Propane ◽  
Design Synthesis ◽  
Method Show

The vanadium-incorporated KIT-6 catalysts synthesized by combining a direct hydrothermal method with a pH adjusting method show superior catalytic performance in the oxidative dehydrogenation of propane to propylene.

scholarly journals Design, synthesis, and catalytic performance of modified graphene oxide based on a cobalt complex as a heterogenous catalyst for the preparation of aminonaphthoquinone derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17108-17115
Author(s):  
Mahnaz Mirheidari ◽  
Javad Safaei-Ghomi
Keyword(s):  
Graphene Oxide ◽  
Cobalt Complex ◽  
Catalytic Performance ◽  
Silica Particles ◽  
Design Synthesis ◽  
Spherical Silica ◽  
Modified Graphene Oxide ◽  
Spherical Silica Particles ◽  
Heterogenous Catalyst ◽  
Modified Graphene

GO@f-SiO2@Co is a heterogenous catalyst composed of spherical silica particles grafted on the surface of graphene oxide with ethylenediamine ligands and coordination with Co(ii). We assessed the activity of the catalyst for the synthesis of aminonaphthoquinones.

scholarly journals Mesoporous Silica Nanoparticles Based Antigens and Nucleic Acids Delivery: A Review

1970 ◽  
Vol 8 (2) ◽  
pp. 50-57
Author(s):  
Jemal Dilebo
Keyword(s):  
Mesoporous Silica ◽  
Nucleic Acids ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Mesoporous Structure ◽  
Nucleic Acid Delivery ◽  
Hollow Core ◽  
Small Molecule Drugs ◽  
Cell Accumulation ◽  
Nucleic Acids Delivery

Mesoporous silica nanoparticles (MSN) have been explored for the delivery of small molecule drugs, antigens, and nucleic acids because of their large surface area, pore volume, amenability of their surface for functionalization, stable mesoporous structure, and biocompatibility.  Biomoecules loading capacitites,  release and target cell accumulation efficiencies have been improved for both antigen and nucleic acid delivery by the synthesis of large-pore MSN, dendritic MSN, hollow-core MSN, and multifunctional MSN. This article overview the major advances in the use of MSN for delivery of antigens and therapeutic nucleic acids such as DNA, siRNA, and miRNA aimed for treatment of various diseases.       

scholarly journals CuZnAl-Oxide Nanopyramidal Mesoporous Materials for the Electrocatalytic CO2 Reduction to Syngas: Tuning of H2/CO Ratio

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3052
Author(s):  
Hilmar Guzmán ◽  
Daniela Roldán ◽  
Adriano Sacco ◽  
Micaela Castellino ◽  
Marco Fontana ◽  
...  
Keyword(s):  
Noble Metals ◽  
Co2 Reduction ◽  
Reduction Process ◽  
Mesoporous Structure ◽  
Catalytic Performance ◽  
H2 Production ◽  
Ambient Conditions ◽  
Transfer Resistance ◽  
Faradaic Efficiency ◽  
Co2 Electroreduction

Inspired by the knowledge of the thermocatalytic CO2 reduction process, novel nanocrystalline CuZnAl-oxide based catalysts with pyramidal mesoporous structures are here proposed for the CO2 electrochemical reduction under ambient conditions. The XPS analyses revealed that the co-presence of ZnO and Al2O3 into the Cu-based catalyst stabilize the CuO crystalline structure and introduce basic sites on the ternary as-synthesized catalyst. In contrast, the as-prepared CuZn- and Cu-based materials contain a higher amount of superficial Cu0 and Cu1+ species. The CuZnAl-catalyst exhibited enhanced catalytic performance for the CO and H2 production, reaching a Faradaic efficiency (FE) towards syngas of almost 95% at −0.89 V vs. RHE and a remarkable current density of up to 90 mA cm−2 for the CO2 reduction at −2.4 V vs. RHE. The physico-chemical characterizations confirmed that the pyramidal mesoporous structure of this material, which is constituted by a high pore volume and small CuO crystals, plays a fundamental role in its low diffusional mass-transfer resistance. The CO-productivity on the CuZnAl-catalyst increased at more negative applied potentials, leading to the production of syngas with a tunable H2/CO ratio (from 2 to 7), depending on the applied potential. These results pave the way to substitute state-of-the-art noble metals (e.g., Ag, Au) with this abundant and cost-effective catalyst to produce syngas. Moreover, the post-reaction analyses demonstrated the stabilization of Cu2O species, avoiding its complete reduction to Cu0 under the CO2 electroreduction conditions.

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