Buscar
Mostrando ítems 1-10 de 313
Deposition of TiO2 thin films by dip-coating technique from a two-phase solution method and application to photocatalysis
(2021-01-01)
A derivation of the sol-gel-dip-coating deposition technique is proposed, where the precursor solution exhibits two separated liquid phases, reaching an equilibrium state in a heterogeneous solution. Structural, optical ...
Effect of lanthanum and lead doping on the microstructure and visible light photocatalysis of bismuth titanate prepared by the oxidant peroxide method (OPM)
(2015-11-01)
Pure (Bi<inf>12</inf>TiO<inf>20</inf>) and La- and Pb-doped (Bi<inf>12-x</inf>La<inf>x</inf>TiO<inf>20</inf> e Bi<inf>12-x</inf>Pb<inf>x</inf>TiO<inf>20</inf>, with x up to 1.50) bismuth titanates were prepared by the ...
Mechanisms of removal of heavy metals and arsenic from water by TiO2-heterogeneous photocatalysis
(De Gruyter, 2015-06)
This article is an overview of recent work performed in our laboratory on TiO2 heterogeneous photocatalysis of aqueous systems containing toxic forms of chromium, arsenic, lead, uranium and mercury. The cases of chromium ...
Microwave-assisted hydrothermal synthesis of Cu-doped titanate nanotubes: Photoluminescence and photocatalysis properties
(2014-01-01)
The synthesis of Cu-doped nanotubes was successfully realized using the hydrothermal method assisted by microwave (MWH). The structure found from XRD shows a typical profile of the layered titanate, containing no peak for ...
Effect of scandium on the structural and photocatalytic properties of titanium dioxide thin films
(2008-01-01)
Pure and scandium doped-TiO2 thin films were prepared by the sol-gel process and coated by dip coating. The effects of scandium on the phase formation, optical properties and photoactivity of the TiO2 thin films were ...
Effect of scandium on the structural and photocatalytic properties of titanium dioxide thin films
(2008-01-01)
Pure and scandium doped-TiO2 thin films were prepared by the sol-gel process and coated by dip coating. The effects of scandium on the phase formation, optical properties and photoactivity of the TiO2 thin films were ...
Structural characterization, optical properties and photocatalytic activity of MOF-5 and its hydrolysis products: implications on their excitation mechanism
(Royal Society of Chemistry, 2015-08-21)
The existing concerns on the limited stability of Zn4O-based MOFs upon exposure to humidity or aqueous environments, as well as on the excitation mechanisms, are discussed on the basis of Raman, FTIR, DR-UV and XRD ...
Photodegradation of phenol red in a compound of type ZnO2Cr core/shell
(2017-01-01)
Surface properties core/shell nanoparticles have been investigated in recent years due to their promising reactivity in catalysis surface. In this work, the ZnO2Cr core/shell nanoparticles were synthesized by Modified ...
Titanate nanotubes produced from microwave-assisted hydrothermal synthesis: Photocatalytic and structural properties
(Elsevier B.V., 2014-11-01)
Titanate nanotubes were successfully synthesized using the microwave-assisted hydrothermal method from commercial TiO2-anatase powder. Several samples were obtained at varying temperatures and time. Powder samples containing ...