16 Result(s)
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Article
Highly selective oxidation of methane to methanol at ambient conditions by titanium dioxide-supported iron species
Methane activation under moderate conditions and with good selectivity for value-added chemicals still remains a huge challenge. Here, we present a highly selective catalyst for the transformation of methane t...
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Chapter
Metal-Substituted Microporous Aluminophosphates
This chapter aims to present the zeotypes aluminophosphates (AlPOs) as a complementary alternative to zeolites in the isomorphic incorporation of metal ions within all-inorganic microporous frameworks as well ...
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Article
Effects of the synthetic condition on the stability, particle size and redox chemistry of nanoporous CoAlPO-34
This study focuses on the effect of the synthetic conditions on the stability, particle size, redox chemistry of cobalt into the framework of CoAlPO-34. It seems that the most sufficient pH for the substitutio...
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Article
Reactivities study of titanium sites in titanosilicate frameworks by in situ XANES
This study focused on the study of titanium sites, their local structure and reactivities in nanoporous titanosilicates frameworks by using in situ X-ray absorption spectroscopy. XANES provides the information...
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Article
Adsorptive characteristics of the polyurethane-immobilized Corynebacterium glutamicum biosorbent for removal of Reactive Yellow 2 from aqueous solution
Polyurethane (PU) was evaluated for its possibility as an immobilization matrix for the raw biomass of Corynebacterium glutamicum. Initially, different blending ratios of the raw biomass to PU weight were tested,...
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Article
On the Nature and Location of Organic Template Molecules and Their Effect on the Stability and Redox Properties of Microporous CoAlPO-34 Catalyst
Small-pore CoAlPO-34 materials were synthesized with a variety of organic template molecules and were characterized in detail, employing microcrystal diffraction, powder diffraction and in situ combined XRD/XAS t...
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Article
The Extremely High Specificity of N-Methyldicyclohexylamine for the Production of the Large-Pore Microporous AFI Material
We describe a highly efficient synthesis of microporous aluminophosphate AlPO4-5 and its heteroatom-substituted variants, using N-methyldicyclohexylamine as a structure-directing agent that, in addition, does not...
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Article
Direct Hydrothermal Conversion of High-Silica Faujausite and Zeolite β to ZSM-5 and Its Catalytic Performance
In the absence of a structure-directing organic molecule, aluminosilicate ZSM-5 is produced directly from high-silica zeolite Y or zeolite β by a simple hydrothermal treatment of the alkali metal hydroxide-tre...
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Chapter
On the Structure of Cobalt-Substituted Aluminophosphate Catalysts and Their Catalytic Performance
Microporous, transition metal ion-substituted aluminophosphate molecular sieves have attracted considerable attention over the last decade owing to their shape-selective catalytic properties for both acid-cata...
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Article
Towards an Environmentally Acceptable Heterogeneous Catalytic Method of Producing Adipic Acid by the Oxidation of Hydrocarbons in Air
A survey is given of the catalytic methods potentially available for the production of adipic acid by the oxidation of readily available hydrocarbon precursors under environmentally benign conditions. Encourag...
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Article
Towards molecular sieve inorganic catalysts that are akin to enzymes: studies of a selective cyclo-dimerization over ferrierite at ambient temperature
The solid-acid (Brønsted)-catalyzed cyclo-dimerization of 3-hydroxy-3-methylbutan-2-one (HMB) over a synthetic ferrierite molecular sieve is reported. HMB is a stable liquid at ambient temperatures but in acid...
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Article
Facile heterogenisation of molecular Ti(OSiPh3)4 to form a highly active epoxidation catalyst
The simple grafting procedure of Ti(OSiPh3)4 onto the internal surface of MCM-41 to produce an epoxidation catalyst of high activity and selectivity is described. The presence of the phenyl groups on each titaniu...
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Article
Combining X‐ray absorption with X‐ray diffraction for the structural elucidation of catalysts
We describe how the combined XAS/XRD technique can provide powerful information on the structures of catalytically active centres. We consider some of the most industrially important catalysts, including Fe‐ZS...
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Article
In situ combined X‐ray absorption spectroscopic and X‐ray diffractometric studies of solid catalysts
The merits of employing combined in situ X‐ray absorption spectroscopy (XAS) and X‐ray diffractometry (XRD) are described by reference to a number of examples, which encompass: (i) crystallisation of molecular...
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Article
Redox solid catalysts for the selective oxidation of cyclohexane in air
The selective oxidation of cyclohexane to cyclohexanol, cyclohexanone and adipic acid using molecular oxygen as the oxidant and at moderate temperatures (403 K) has been investigated over four different cobalt...
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Article
Synthesis and characterisation by X-ray absorption spectroscopy of a suite of seven mesoporous catalysts containing metal ions in framework sites
MCM-41 type mesoporous silicas have been prepared in which one or more of the following elements are accommodated in framework sites: titanium, iron, chromium, vanadium, manganese, boron and aluminium. XRD and...
