Catalysts, Volume 3, Issue 1

Photocatalytically active titanium dioxide (TiO₂) is widely used as a self-cleaning and self-disinfecting material in many applications to keep environments biologically clean. Several studies on the inactivation of bacteria and viruses by photoca...

The effect of nanostructured supports on the activity of Rh catalysts was studied by comparing the catalytic performance of nano- and bulk-oxide supported Rh/ZnO, Rh/SiO₂ and Rh/TiO₂ systems in 1-hexene hydroformylation. The highest activity with 100...

Practical photocatalysis for degradation of organic pollutants must take into account the influence of other chemicals. Significant Al deposition on titania can occur at naturally occurring concentrations of dissolved Al. This paper reviews the autho...

Gold nanostars of ~70 nm tip to tip distances were synthesized by a seed mediated method and covalently self-assembled on 1,5-pentanedithiol modified electrodes. Electron transfer kinetics at the AuNS/dithiol modified electrodes were studied as a fun...

A partially reduced TiO2 surface exhibits increasingly complex nature when forming various defects, whose stoichiometry, structure and properties are markedly different from those of bulk TiO2. Using scanning tunneling microscopy and density function...

A series of novel half-titanocene complexes CpTiCl₂[S-2-R-6-(PPh₂)C₆H₃] (Cp = C₅H₅, 2a, R = H; 2b, R = Ph; 2c, R = SiMe₃) have been synthesized by treating CpTiCl₃ with the sodium of the ligands, 2-R-6-(PPh₂)C₆H₃SNa, which were prepared by the corres...

Gas-solid heterogeneous photooxidation of toluene over TiO₂ catalyst was studied to investigate the factors controlling the catalytic activities. The toluene photooxidation behavior on TiO₂ was strongly affected by the formation and oxidation behavio...

Kraft pulp has to be bleached to eliminate the chromophoric structures, which cause a darkening of the pulp. In Nature, an equivalent role is assumed by ligninolytic enzymes such as lignin peroxidases, manganese peroxidases and laccases. The developm...

TiO₂ nanostructured films were synthesized by an aerosol chemical vapor deposition (ACVD) method with different controlled morphologies: columnar, granular, and branched structures for the photocatalytic inactivation of Escherichia coli (E. coli) in...

Semiconductor heterogeneous photocatalysis, the subject of this review, is a versatile, low-cost and environmentally benign treatment technology for a host of pollutants. These may be of biological, organic and inorganic in origin within water and ai...

We synthesized polyethylene (PE), poly(ethylene-co-1-decene), poly(ethylene-co-p-methylstyrene) and poly(ethylene-ter-1-decene-ter-p-methystyrene) using a rac-Et(Ind)₂ZrCl₂ metallocene catalyst and a methylaluminoxane cocatalyst system. The materials...

This review summarizes recent results for ethylene/styrene copolymerization using half-titanocenes containing anionic donor ligands, Cp’TiX₂(Y) (X = halogen, alkyl; Y = aryloxo, ketimide etc.)–cocatalyst systems. The product composition, the styrene...

In heterogeneous Ziegler-Natta catalysts for olefin polymerization, isolation of a single type of active sites is a kind of ambition, which would solve long-standing questions on the relationship between active site and polymer structures. In this pa...

The effect of ligand and Al cocatalysts in ethylene polymerization, using V(N-1-adamantyl)Cl₂(L) [L = 2-(2,6-Me₂C₆H₃)NCH₂(C₉H₆N), 8-(2,6-Me₂C₆H₃)NCH₂(C₉H₆N)] and V(N-2-MeC₆H₃)Cl₂[2-(2,6-R'₂C₆H₃)NCH₂(C₅H₄N)] (R' = Me, ⁱPr), has been explored. The rea...

In this work, we studied how TiO₂ and ZrO₂ coatings enhance the CO oxidation performance of SiO₂-supported Pt catalysts under conditions relevant to automotive emissions control. SiO₂ was coated with metal oxides TiO₂ or ZrO₂ by sol-gel method and th...

A synthetic scheme was developed for the large-scale preparation of a dimethylthiophene-fused and tetrahydroquinaldine-linked dimethylcyclopentadienyl titanium complex (2), which is a high-performance homogeneous Ziegler catalyst. 2,3,4,5-Tetramethyl...

Heterogeneous catalysts for production of linear α-olefins from ethylene were prepared by the direct reaction of the α-diimine ligand [L: R-N=C(R')-C(R')=N-R; R' = Me and R = 2,6-Me₂Ph (L5), 2,5-Me₂Ph (L1), 2-MePh (L2), or Ph (L3); R' = 1,8-naphth-di...

Analysis methods that require small volumes of aqueous samples can be of large benefit for applications when expensive chemicals are involved or available volumes are substantially small and concentrations are low. A new method is presented to allow...

We report the first evidence of an enzyme-catalyzed transetherification of model alkoxysilanes. During an extensive enzymatic screening in the search for new biocatalysts for silicon-oxygen bond formation, we found that certain enzymes promoted the t...

Brookite is the least studied TiO₂ photocatalyst due to the difficulties usually encountered in order to obtain it as a pure phase. In this review, a comprehensive survey of the different methods available for preparing brookite powders and films is ...

Sr_2−xBa_xTa₃O_10−yN_z (x = 0.0, 0.5, 1.0) nanosheets were prepared by exfoliating layered perovskite compounds (CsSr_2−xBa_xTa₃O_10−yN_z). The Sr_1.5Ba_0.5Ta₃O_9.7N_0.2 nanosheet showed the highest photocatalytic activity for H₂ production from the water/methan...

Vanadium phosphorous oxide (VPO) is traditionally manufactured from solid vanadium oxides by synthesizing VOHPO₄∙0.5H₂O (the precursor) followed by in situ activation to produce (VO)₂P₂O₇ (the active phase). This paper discusses an alternative synthe...