Gianguido Ramis
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View article: Improving CO<sub>2</sub> Photoconversion by Layered Materials: Boosted Optoelectronic Performance and Catalytic Activity of g‐C<sub>3</sub>N<sub>4</sub> by Ultrasound Exfoliation
Improving CO<sub>2</sub> Photoconversion by Layered Materials: Boosted Optoelectronic Performance and Catalytic Activity of g‐C<sub>3</sub>N<sub>4</sub> by Ultrasound Exfoliation Open
Exfoliation of graphitic carbon nitride g‐C3N4 by means of ultrasound (US) treatment at varying input power is investigated. Exfoliation of g‐C3N4 displays a strong dependence of US input power, with a slightly enhanced bandgap (2.8 eV), b…
View article: Oxidative Steam Reforming of Methanol over Cu-Based Catalysts
Oxidative Steam Reforming of Methanol over Cu-Based Catalysts Open
Several Cu and Ni-based catalysts were synthetized over Ce-based supports, either pure or mixed with different amounts of alumina (1:2 and 1:3 mol/mol). Different metal loadings (10–40 wt%) and preparation methods (wet impregnation, co-pre…
View article: Reactor and Plant Designs for the Solar Photosynthesis of Fuels
Reactor and Plant Designs for the Solar Photosynthesis of Fuels Open
Solar-boosted photo-technology stands out as a powerful strategy for photosynthesis and photocatalytic processes due to its minimal energy requirements, cost-effectiveness and operation under milder, environmentally friendly conditions com…
View article: Comparison of Different Advanced Oxidation Processes (AOPs) and Photocatalysts for the Degradation of Diclofenac
Comparison of Different Advanced Oxidation Processes (AOPs) and Photocatalysts for the Degradation of Diclofenac Open
Diclofenac sodium salt was photodegraded by means of advanced oxidation processes (AOPs), such as Fenton, photo‐Fenton and heterogeneous photocatalysis. For the latter different photocatalysts were compared, namely commercial titania P25 a…
View article: Highly Efficient and Effective Process Design for High-Pressure CO2 Photoreduction over Supported Catalysts
Highly Efficient and Effective Process Design for High-Pressure CO2 Photoreduction over Supported Catalysts Open
The photocatalytic reduction of CO2 into solar fuel is considered a promising approach to solving the energy crisis and mitigating the environmental pollution caused by anthropogenic CO2 emission. Some powder photocatalysts have been demon…
View article: Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction
Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction Open
In the current research, the productivity of CO2 photoreduction has been boosted by performing the reaction in an innovative photocatalytic reactor, which allows for operation up to 20 bar. A set of photocatalysts were used, including thre…
View article: Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction
Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction Open
In this work we focus on carbon nitride materials to improve the conversion and productivity of the photoreduction of CO2, developing a coupled strategy to optimize materials and operating conditions. The metal-free polymeric catalyst, gra…
View article: Low Metal Loading (Au, Ag, Pt, Pd) Photo-Catalysts Supported on TiO2 for Renewable Processes
Low Metal Loading (Au, Ag, Pt, Pd) Photo-Catalysts Supported on TiO2 for Renewable Processes Open
Photo-catalysts based on titanium dioxide, and modified with highly dispersed metallic nanoparticles of Au, Ag, Pd and Pt, either mono- or bi-metallic, have been analyzed by multiple characterization techniques, including XRD, XPS, SEM, ED…
View article: Photocatalytic Reduction of Nitrates and Combined Photodegradation with Ammonium
Photocatalytic Reduction of Nitrates and Combined Photodegradation with Ammonium Open
Bare titania and metal-promoted TiO2 catalysts were employed in the treatment of nitrates, which are ubiquitous pollutants of wastewater. The results show that the process can be carried out under visible light (from a white light LED lamp…
View article: Effect of Metal Cocatalysts and Operating Conditions on the Product Distribution and the Productivity of the CO<sub>2</sub> Photoreduction
Effect of Metal Cocatalysts and Operating Conditions on the Product Distribution and the Productivity of the CO<sub>2</sub> Photoreduction Open
The CO2 photoreduction is a promising way to convert one of the most abundant greenhouse gases to valuable chemicals. The photoreduction in the liquid phase is limited by the low solubility of CO2 in water, but this point is overcome here …
View article: Photocatalytic Reduction of Nitrates and Combined Photodegradation with Ammonium
Photocatalytic Reduction of Nitrates and Combined Photodegradation with Ammonium Open
Bare titania and metal promoted TiO2 catalysts were employed in the treatment of nitrates, which are ubiquitous pollutants of wastewater. The results show that the process can be carried out under visible light (from white light LED lamp) …
View article: Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems
Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems Open
The salting out of acetonitrile from water in the presence of ammonium bicarbonate was studied at atmospheric pressure from 4 to 35 °C. The coexisting phases were analyzed independently with H1 nuclear magnetic resonance, ion chromatograph…
View article: Photo-Oxidation of Ammonia to Molecular Nitrogen in Water under UV, Vis and Sunlight Irradiation
Photo-Oxidation of Ammonia to Molecular Nitrogen in Water under UV, Vis and Sunlight Irradiation Open
Titanium dioxide-based photocatalysts have been used to perform the photo-oxidation of ammonium/ammonia to molecular nitrogen. Different light sources were employed, i.e., UV, LED visible light and natural sunlight, and their performance w…
View article: Feasibility Study of the Solar-Promoted Photoreduction of CO2 to Liquid Fuels with Direct or Indirect Use of Renewable Energy Sources
Feasibility Study of the Solar-Promoted Photoreduction of CO2 to Liquid Fuels with Direct or Indirect Use of Renewable Energy Sources Open
Solar irradiation data collected at the latitude of Milan city, near the 45th parallel North, and original activity data of some high-performing photocatalysts (i.e., commercial TiO2 P25, TiO2 prepared by flame spray pyrolysis, 0.2% wt/wt …
View article: Kinetic Modelling of Biodegradability Data of Commercial Polymers Obtained under Aerobic Composting Conditions
Kinetic Modelling of Biodegradability Data of Commercial Polymers Obtained under Aerobic Composting Conditions Open
Methods to treat kinetic data for the biodegradation of different plastic materials are comparatively discussed. Different samples of commercial formulates were tested for aerobic biodegradation in compost, following the standard ISO14855.…
View article: Photocatalytic Selective Oxidation of Ammonia in a Semi-Batch Reactor: Unravelling the Effect of Reaction Conditions and Metal Co-Catalysts
Photocatalytic Selective Oxidation of Ammonia in a Semi-Batch Reactor: Unravelling the Effect of Reaction Conditions and Metal Co-Catalysts Open
Photocatalysis has been used for the oxidation of ammonia/ammonium in water. A semibatch photoreactor was developed for this purpose, and nanostructured TiO2-based materials, either commercial P25 or prepared by flame spray pyrolysis (FSP)…
View article: Capture Mechanism of La and Cu Ions in Mixed Solutions by Clay and Organoclay
Capture Mechanism of La and Cu Ions in Mixed Solutions by Clay and Organoclay Open
In this work, Ca-montmorillonite (STx), natural and modified (STx-L6) with a linear penta-ethylene-hexamine (L6), were tested as sorbents in a liquid/solid process for La and Cu capture in bionic model solutions. Twelve La/Cu ratios in sol…
View article: Flame Pyrolysis Synthesis of Mixed Oxides for Glycerol Steam Reforming
Flame Pyrolysis Synthesis of Mixed Oxides for Glycerol Steam Reforming Open
Flame spray pyrolysis was used to produce nanosized Ni-based catalysts starting from different mixed oxides. LaNiO3 and CeNiO3 were used as base materials and the formulation was varied by mixing them or incorporating variable amounts of Z…
View article: Design of a process for the one-pot bio-ethylene oxide production
Design of a process for the one-pot bio-ethylene oxide production Open
The possibility to exploit renewable sources for the production of bulk chemicals is attractive and bio-ethanol has been recently proposed as platform to produce hydrogen via steam reforming and bio-ethylene by dehydration. Another compoun…
View article: Development and comparison of advanced oxidation processes (aops) for the mineralization of azo-dyes from wastewaters
Development and comparison of advanced oxidation processes (aops) for the mineralization of azo-dyes from wastewaters Open
The Dystar s Levafix Brilliant Red E-6BA dye was tested as model molecule and treated through three different Advanced Oxidation Processes (APOs): H2O2/UV, Fenton and Photo-Fenton reactions. Amount of oxidant, quantity of Fe catalyst, type…
View article: Rare Earths (La, Y, and Nd) Adsorption Behaviour towards Mineral Clays and Organoclays: Monoionic and Trionic Solutions
Rare Earths (La, Y, and Nd) Adsorption Behaviour towards Mineral Clays and Organoclays: Monoionic and Trionic Solutions Open
Metals from electric and electronic waste equipment (WEEE) can be recovered by dissolution with acids followed by liquid–liquid extraction. A possible alternative to liquid–liquid extraction is liquid–solid adsorption, where sorbents effic…
View article: Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment
Reduced Graphene Oxide Membranes as Potential Self-Assembling Filter for Wastewater Treatment Open
This work focuses on the investigation of the capability of reduced graphene oxide (rGO) filters to remove metals from various wastewater. The process to produce rGO membranes is reported and discussed, as well as their ability to capture …