Search results for " (photo)catalysis"
showing 10 items of 166 documents
Fundamentals of Heterogeneous Photocatalysis and its Application for Environmental and Synthetic Purposes
2010
Keggin and Wells-Dawson supported heteropolyacids as heterogeneous (photo)catalysts for gas-solid 2-propanol dehydration
2016
Catalytic and photocatalytic tests for 2-propanol dehydration to propene were successfully carried out by using binary materials obtained by supporting a Keggin or Wells-Dawson heteropolyacids via impregnation method to commercial SiO2 or TiO2. (Photo)catalytic 2-propanol dehydration was studied in gas-solid regime by using a continuous (photo)reactor working at atmospheric pressure and 80 °C. Propene and diisopropyl ether were the main reaction products. For the continuous photo-assisted runs the reactor was also illuminated with UV light. The heteropolyacid species played a key role both for the catalytic and the photo-assisted catalytic reactions; indicating that the acidity of the clust…
Photocatalytic processes in membrane reactors
2017
Photocatalytic membrane reactors (PMRs) represent an interesting alternative technology useful both in the field of water and air purification and in organic syntheses. The necessity to develop chemical products and industrial processes that reduce or eliminate the use and the generation of toxic substances along with the risk for human health and for environment constitutes the aim of the research efforts based on the principles of green chemistry. Heterogeneous photocatalysis is a technology extensively studied for about three decades, since Fujishima and Honda1 discovered the photocatalytic splitting of water on TiO2 electrodes in 1972, which includes a large range of reactions. When a s…
Photo-assisted Degradation of 2-Propanol in Gas-Solid Regime by Using TiO2 Impregnated with Heteropolyacids H3PW12O40
2009
Commercial and home prepared TiO2 samples impregnated with tungstophosphoric acid (H3PW12O40) were used for the photo-assisted degradation of 2-propanol in gas–solid regime. The characterization results evidenced a good coverage of the polyoxometalate (POM) onto the surface of TiO2 along with a marginal effect of the presence of the POM on the specific surface area, morphology and cristallinity of the samples. Propene was the main intermediate product revealed in 2-propanol photocatalytic degradation by using as photocatalysts the samples containing the POM, whereas propanone wasmainly obtained when the photocatalysts was bare TiO2, both commercial or home prepared. Acetaldehyde was also fo…
Selective Gree-Syntheses of Flavour-Molecules through TiO2 Photocatalysis in Aqueous Suspension
2013
Photoactivity of Shape-Controlled TiO2 in Gas-Solid Regime Under Solar Irradiation
2018
Shape-controlled TiO2 materials have been tested as photocatalysts under both simulated and natural solar irradiation.
SrTiO3 Based Perovskites: Preparation, Characterization and Photocatalytic Activity in Gas-Solid Regime
2014
A comparison among different strategies to boost the performance of TiO2 photocatalysts
2018
Since its application in water cleavage usinga TiO2 photoanode in 1972, photocatalysis attracted great interest as green technology
Photocatalytic water splitting over inverse opal TiO2 catalysts
2017
Photocatalytic water splitting over inverse opal TiO2 catalysts