0000000000923968
AUTHOR
L. Palmisano
showing 48 related works from this author
EPR study of polymeric carbon nitride photocatalysts
2018
EPR spectrometry servea as a unique tool by characterization of polymeric carbon nitride photocatalysts and evaluation of its photocatalytic performance in suspension.
Comparison of the performances of an annular photocatalytic reactor with fluorescent lamp and a plane reactor with LEDs
2018
Comparison of the performances of an annular photocatalytic reactor with fluorescent lamp and a plane reactor with LEDs
Nanosponge-C3N4 composites with improved photocatalytic activity for selective partial alcohol oxidation in aqueous suspension
2022
Composites of C3N4 with nanosponges based on β-cyclodextrins containing a 5% w/w of C3N4 were synthesised, physicochemicaly characterised and tested as heterogeneous photocatalysts for the degradation of 4-nitrophenol and for the partial oxidation of 5-hydroxymethyl-2-furfural and veratryl alcohol. The results outline a synergistic effect in terms of conversion and selectivity. The association of the nanosponges with the C3N4 enhances the photocatalytic activity of the semiconductor, possibly due to the local concentration effect occurring on the photocatalyst surface that would involve a concentration into the nanosponge matrix ca. 500 times larger than in the solution bulk. Composites of …
Effects of weathering on the performance of self-cleaning photocatalytic paints
2019
Abstract The use of photocatalytic products for the surface coating of buildings is spreading more and more, because of the reduction of atmospheric pollutants and the colour maintenance of the paints over time with reduction of the maintenance costs and the improvement of the aesthetic appearance. The study reports the evaluation of the effects of the atmospheric conditions on three commercial photocatalytic paints containing TiO2. In particular tests were carried out by using samples subjected to accelerated aging inside a climate chamber and naturally aged by exposure for two years to the external environment of the city of Palermo (representative of a coastal environment of the Mediterr…
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…
Photocatalytic solar light H2 production by aqueous glucose reforming
2018
A series of tungsten and nitrogen doped Pt-TiO2 samples were prepared with the aim to extend the TiO2 absorption to the visible light region and to enhance the separation efficiency of the photogenerated electron/hole pairs. The physicochemical features of the powders were characterized by Xray diffraction (XRD), UV/Vis reflectance spectra, specific surface area (SSA) determinations, and transmission electron microscopy (TEM) analyses. The influence of the presence of different doping agents was evaluated, under anaerobic conditions, in the aqueous photo-reforming of glucose to form H2 at ambient pressure and temperature under a halogen lamp or natural solar light irradiation. Arabinose, er…
Carbon nitride nanosheets for the selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural to 2,5-furandicarboxyaldehyde in water suspension
2017
Carbon nitride nanosheets for the selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural to 2,5-furandicarboxyaldehyde in water suspension
Greeen Synthesis of Bromine through photocatalysis and ozonation
2017
Greeen Synthesis of Bromine through photocatalysis and ozonation
Selective Photocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxaldehyde by Polymeric C3N4-H2O2 Adduct
2018
Selective Photocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxaldehyde by Polymeric C3N4-H2O2 Adduct
Study of the photocatalytic activity of Keggin and Wells Dawson heteropolyacids: role of the acidity and of the pseudo-liquid phase regime
2017
Study of the photocatalytic activity of Keggin and Wells Dawson heteropolyacids: role of the acidity and of the pseudo-liquid phase regime
Photocatalytic Processes in Membrane Reactors
2010
Conversion and degradation processes of various substrates in various types of matrices using both artificial and solar light are today very attractive by considering the scarcity and the expensiveness of the conventional energy sources. Coupling of membrane with light has shown to be very powerful and promising hybrid process, especially because a synergistic effect has been often observed. Some examples of reactions carried out to produce useful chemicals or to degrade noxious species in the framework of the green chemistry approach are reported. Fundamentals of heterogeneous photocatalysis, in general, and photocatalytic reactions in membrane reactors, in particular, are treated with a f…
Overview on photoreforming of biomass aqueous solutions to generate H2 in the presence of g-C3N4 based materials
2023
Photoreforming (PR) of biomass can be considered a viable technology under mild experimental conditions to produce hydrogen with a high reaction rate using compounds from renewable resources and waste materials. The application of biomass PR gives rise to both hydrogen generation and biomass waste valorization. The process could be scaled up to obtain hydrogen under natural sunlight irradiation, and research on polymeric carbon nitride (g-C3N4)-based photocatalysts has been widely carried out in recent years. The non-metallic-based carbon nitride materials are economical and (photo)stable polymer semiconductors, and their physicochemical surface and electronic properties are optimal for obt…
Br2 production from photocatalysis and/or ozonation of bromide containing aqueous solutions: kinetics and mechanisms
2018
Br2 production from photocatalysis and/or ozonation of bromide containing aqueous solutions: kinetics and mechanisms
Ossidazione fotocatalitica selettiva di 5-idrossimetil-2-furfurale a 2,5-furandicarbossilaldeide in sospensioni acquose di nitruro di carbonio
2017
Ossidazione fotocatalitica selettiva di 5-idrossimetil-2-furfurale a 2,5-furandicarbossilaldeide in sospensioni acquose di nitruro di carbonio
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 membrane reactor for CO2 conversion
2017
Photocatalytic membrane reactor for CO2 conversion
Polymeric C3N4 and O-doped C3N4: Photoelectrochemical and EPR Features for Selective Photocatalytic Oxidation of Alcohols to Aldehydes
2018
Polymeric C3N4 and O-doped C3N4: Photoelectrochemical and EPR Features for Selective Photocatalytic Oxidation of Alcohols to Aldehydes
Electron transfer and energy transfer in heterogeneous photocatalysis
2018
Electron transfer and energy transfer in heterogeneous photocatalysis
ZrO2 based materials: preparation, characterization and photocatalytic activity for 2-propanol oxidation and CO2 reduction
2017
ZrO2 based materials: preparation, characterization and photocatalytic activity for 2-propanol oxidation and CO2 reduction
C3N4/reduced graphene oxide photocatalysts loaded with Ag or Ag/Pt for H2 evolution from aqueous solution of triethanolamine
2023
Composites of C3N4/reduced graphene oxide have been used as photocatalysts for triethanolamine photo- reforming with H2 generation in aqueous solution. The rate of H2 production over the Ag loaded best per- forming photocatalyst reached 525 μmol⋅h
Doped TiO2 Nanomaterials and Applications
2008
This special issue brieflyreviews some trends and factors that have impacted heterogeneous photocatalysis with next generation TiO2 nanophotocatalysts that could absorband make use of both UV (290–400 nm) and visible (400–700 nm) sunlight to enhance process efficiencies, along with some issues of current debate in the fundamental understanding of the science that underpins the field. Preparative methods and some characteristics features of doped TiO2 as well as its environmental applications are presented and described. The next generation of doped TiO2 photocatalysts should enhance overall process photoefficiencies in many cases, since doped TiO2s absorb a greater quantity of solar radiati…
Inverse opal TiO2 photocatalytsts for environmental applications
2017
This work aims to study the influence that different doping agents can have on the chemico-physical properties of TiO2 synthesized with the task to obtain an ordered porous material with an inverse opal structure and to evaluate the photocatalytic performance of these systems in the degradation of a model dye molecule (Rhodamine B, RhB) in water under Visible light irradiation.
Heterogeneous photocatalysis: a promising advanced oxidation process
2018
This chapter reports the fundamentals of heterogeneous PC. In particular, different kinetic models and the influence of some parameters (such as pH, temperature, light intensity) on the rate of PC are described, and the effects of some photocatalyst modifications are discussed. Methods for photoreactor modeling are analyzed and the coupling of PC with other AOPs using H2O2, O3, and peroxydisulfate are discussed.
CO2 conversion in continuous photocatalytic membrane reactor
2017
CO2 conversion in continuous photocatalytic membrane reactor
Addressing the photocatalytic mechanism through TiO2 surface engineering
2018
Addressing the photocatalytic mechanism through TiO2 surface engineering
Green organic reactions through TiO2 heterogeneous photocatalysis
2016
Green organic reactions through TiO2 heterogeneous photocatalysis  
HMF Selective Photo-oxidation in Aqueous Suspension of Both Bare and H2O2 Treated Carbon Nitride Carried out in a Solar Pilot Plant
2018
HMF Selective Photo-oxidation in Aqueous Suspension of Both Bare and H2O2 Treated Carbon Nitride Carried out in a Solar Pilot Plant
Heterogeneous photocatalysis for selective partial oxidation reactions in aqueous suspension
2018
Heterogeneous photocatalysis for selective partial oxidation reactions in aqueous suspension
Emerging photocatalytic applications of graphitic carbon nitride
2016
Graphitic carbon nitride assisted partial photocatalytic oxidation of the biomass platform molecule 5-hydroxymethyl-2-furfural (HMF) in aqueous medium was investigated. Different carbon nitride precursors were considered, being melamine the one yielding the most efficient photocatalyst The thermal exfoliation procedure of g-C3N4 gave rise to exfoliated samples with higher specific surface areas that also showed both an enhanced photocatalytic activity in conversion of HMF, and selectivity (ca. 42-45 %) towards FDC. The utilization of radical scavengers revealed that superoxide radicals were the main reactive species responsible for HMF oxidation to FDC. The use of natural solar light result…
Application of thermally exfoliated g-C3N4 for a green selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural
2016
Graphitic carbon nitride assisted partial photocatalytic oxidation of 5-hydroxymethyl-2-furfural (HMF) in aqueous medium was investigated. Different carbon nitride precursors were considered, being melamine the one yielding the most efficient photocatalyst. The obtained 30% selectivity of HMF oxidation towards 2,5-furandicarboxaldehyde (FDC) is higher than those reported up to now. A further thermal exfoliation of the g-C3N4 samples showed under artificial light irradiation both an enhanced photocatalytic activity in conversion of HMF, and selectivity (ca. 42-45 %) towards FDC. The performance of the catalysts increased when the experiments were carried out under real outdoor illumination, …
CO2 Reduction in Photocatalytic Membrane Reactor: Products Selectivity Study
2018
CO2 Reduction in Photocatalytic Membrane Reactor: Products Selectivity Study
Removal of Intermediate Compounds in a Photocatalytic Process
2010
6th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications (SPEA6) -- JUN 13-16, 2010 -- Prague, CZECH REPUBLIC
Prevalence of acquired resistance mutations in a large cohort of perinatally infected HIV-1 patients
2019
Glycerol Partial Oxidation in Aqueous Solution by Home Prepared TiO2 Photocatalyst
2010
6th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications (SPEA6) -- JUN 13-16, 2010 -- Prague, CZECH REPUBLIC
Photocatalytic water splitting over inverse opal TiO2 catalysts
2017
Photocatalytic water splitting over inverse opal TiO2 catalysts
TiO2 Photocatalytic glucose conversion to H2 and high value chemicals
2015
In this work it is reported the conversion of glucose in aqueous dispersion of various TiO2 based photocatalysts. Aerobic and anaerobic conditions were used to study the distribution of the products both in the liquid (arabinose, gluconic acid, fructose and formic acid) and gas (H2 and CO2) phases. Commercial and home prepared bare and Pt-supported TiO2 samples were used as the photocatalysts.
Supported Keggin heteropolyacid catalysts for glycerol acetylation
2017
Heteropolyacids (HPAs) are a class of molecular metal oxides called polyoxometalates, with a heteroatom in the cluster structure forming an oxo-metallic cluster with the addenda metal atoms. Due to the tunable acid-base and redox properties, HPAs have been used as catalysts both for homogeneous and heterogeneous reactions. Many efforts have been devoted to HPAs heterogeneization because, being soluble in polar solvents, their separation and recovery in liquid-solid regime reactors is a relevant practical application problem. Moreover, due to the low specific surface areas (1÷10 m2 g-1) their dispersion on supports with high surface area can increase the accessibility of the reacting species…
Efficient H2 production by photocatalytic water splitting under visible light over modified TiO2-based catalysts
2018
Efficient H2 production by photocatalytic water splitting under visible light over modified TiO2-based catalysts
Green Synthesis of Vanillin: Pervaporation and Dialysis for Process Intensification in a Membrane Reactor.
2019
In the present work, two different membrane processes (pervaporation and dialysis) are compared in view of their utilization in a membrane reactor, where vanillin, which is probably the most important aroma of the food industry, is synthesized in a green and sustainable way. The utilized precursor (ferulic acid, which is possibly a natural product from agricultural wastes) is partially oxidized (photocatalytically or biologically) and the product is continuously recovered from the reacting solution by the membrane process to avoid its degradation. It is observed that pervaporation is much more selective towards vanillin than dialysis, but the permeate flux of dialysis is much higher. Furthe…
Effect of the TiO2 crystalline structure on the photocatalytic production of hydrogen
2010
Photocatalytic and Catalytic Oxidation of 2-Propanol over Au/TiO2-CeO2 Catalysts
2016
Photocatalytic and catalytic oxidation of 2-propanol (representative VOC’s compound) were compared over mixed (Au)TiO2-CeO2-based catalysts. The role of support in Au catalyzed oxidation reaction under photo and dark conditions was studied. In the photocatalytic oxidation CeO2 had a negative effect on the performance towards the alcohol conversion of both TiO2-CeO2 and Au/TiO2-CeO2 catalysts, being Au/TiO2 the most active system. On the contrary mixed TiO2-CeO2 and Au/TiO2- CeO2 samples showed a higher catalytic oxidation efficiency for 2-propanol conversion compared to the single oxides.
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.
Photocatalytic glucose conversion to produce hydrogen in the presence of TiO2 based materials.
2015
In the present research commercial anatase (BDH) and anatase/rutile (P25) and home prepared anatase (HPA), rutile (HPR) and brookite (HPB) TiO2 polymorphs and have been used as supports for the deposition of metallic Pt. The Pt-TiO2 samples have been tested in the glucose conversion under anaerobic conditions. The presence of Pt resulted essential for the production of H2 and the home prepared samples resulted more active than the commercial ones.
Photocatalytic Solar Light H2 Production by Aqueous Glucose Reforming
2018
Photocatalytic Solar Light H2 Production by Aqueous Glucose Reforming
Different preparation methods of bare and doped carbon nitride (C3N4) employed for selective photocatalytic oxidations
2018
Different preparation methods of bare and doped carbon nitride (C3N4) employed for selective photocatalytic oxidations
Photocatalytic Gas-Solid Propene Hydration and Liquid-Solid Glycerol Dehydration by using Keggin Heteropolyacids Supported on TiO2
2015
Photo)catalytic propylene hydration to 2-propanol and glycerol dehydration to acrolein reactions were carried out by using Keggin heteropolyacids (HPAs) supported on TiO2. Binary materials have been prepared by impregnation of H3PW12O40, H3PMo12O40 and H4SiW12O40, on TiO2 Evonik P25. Moreover, a binary material consisting of H4SiW12O40 and TiO2 was prepared via a hydrothermal treatment and tested for the same reactions. All the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy observations (SEM) coupled with energy dispersive X-rayand (EDX) measurements, diffuse reflectance spectroscopy (DRS), Raman spectroscopy and Fourier transform infrared spectroscopy…