Anna M Eremenko - Academia.edu (original) (raw)

Papers by Anna M Eremenko

Research paper thumbnail of Spectroscopic kinetic characteristics of the fluorescence of anthracene sorbed on silica gel

Theoretical and Experimental Chemistry, 1985

ABSTRACT

Research paper thumbnail of Spectral characteristics of the trypaflavine dye in a silica matrix

Theoretical and Experimental Chemistry, 1986

Calculating structural characteristics during investigation of the submicroscopic structure of co... more Calculating structural characteristics during investigation of the submicroscopic structure of concrete by small angle X-ray diffraction analysis," Zh.

Research paper thumbnail of Spectral parameters and photoprotolytic interactions for acridine adsorbed on silica

Journal of Applied Spectroscopy, 1990

Research paper thumbnail of Features of diffusion-controlled bimolecular reaction of fluorescence quenching in sol-gel-xerogel transitions

Theoretical and Experimental Chemistry, 1998

ABSTRACT

Research paper thumbnail of Donor-acceptor complexes of excited states on silica surface and in hexane solution at liquid nitrogen temperature

Research on Chemical Intermediates, 1998

It is shown that an exeiplex between pyrene (Py) and N,N-dimethylaniline (DMA) forms at low tempe... more It is shown that an exeiplex between pyrene (Py) and N,N-dimethylaniline (DMA) forms at low temperature (77 K) on the nonporous silica surface and in a solid hexane solution. The fluorescence lifetime of pyrene in the adsorption state increases when the quencher concentration grows at 77 K. The exciplex fluorescence spectra in the adsorption state shifts to a blue wavelength range when the temperature decreases as a result of the dipole-dipole interaction of the exciplex with the hydroxy groups of the silica surface. On the basis of the model suggested the hydroxyl group concentration on the dehydrated at 770 K silica surface has been estimated.

Research paper thumbnail of Photophysical properties of TICT molecule adsorbed on semiconductor titania–silica colloids

Journal of Photochemistry and Photobiology A: Chemistry, 2006

The effect of semiconductor titania–silica colloids on the fluorescent properties of adsorbed 4-(... more The effect of semiconductor titania–silica colloids on the fluorescent properties of adsorbed 4-(4′-N, N-diethylaminophenyl-3, 5-dimethyl-1, 7-diphenyl-bis-pyrazolo-[3, 4-b, 3′-e]-pyridine (DEA-DMPP) has been studied by steady-state and time-resolved fluorescence ...

Research paper thumbnail of Surface photochemistry: the organic charge-transfer complexes on silica

Journal of Molecular Structure, 1992

ABSTRACT

Research paper thumbnail of Conformational Control in Previtamin D Photosynthesis by Heterogeneous Media

Research on Chemical Intermediates

ABSTRACT

Research paper thumbnail of Photogeneration of nanosized gold on the surface of mesoporous silica modified by benzophenone

Theoretical and Experimental Chemistry, 2005

We have studied the photocatalytic activity of porous silicas (silica gel, mesoporous sol-gel fil... more We have studied the photocatalytic activity of porous silicas (silica gel, mesoporous sol-gel films) modified by benzophenone molecules, in the reaction of reduction of gold from tetrachloroaurate ions. Stable colloids of nanosized gold were obtained as a result of irradiating aqueous alcoholic solutions of HAuCl 4 •3H 2 O in the presence of the photocatalyst SiO 2-BP using as the stabilizers: a colloidal solution of silica (Ludox) or the surfactant sodium dodecyl sulfate (SDS). We have studied the effect of the stabilizer on the kinetics of the photoreduction reaction, and also on the shape and size of the nanoparticles formed.

Research paper thumbnail of Nature of the luminescence centers in amorphous silica

Theoretical and Experimental Chemistry, 1982

Research paper thumbnail of Spectroscopic and Mass-Spectrometric Study of Acridine Orange Photodegradation on the Surface of Mesoporous TiO2, SiO2 /TiO2 and SiO2 Films

Journal of Advanced Oxidation Technologies, 2008

The efficiency of nanosized mesoporous TiO 2 , SiO 2 /TiO 2 and SiO 2 films as photocatalytic cov... more The efficiency of nanosized mesoporous TiO 2 , SiO 2 /TiO 2 and SiO 2 films as photocatalytic coverings has been demonstrated by the example of adsorbed acridine orange (AO) dye photodegradation in air. SiO 2-and TiO 2-based functional coatings were prepared via template assisted sol-gel method. The films were characterized by electron microscopy (SEM, TEM), FTIR and UV-Vis spectroscopy. Hydrophylic properties of prepared films were estimated from the water contact angle measurements. Electronic spectra and LDI mass-spectra changes accompanying AO photodegradation under the UV-exposure were investigated and main photodestruction products have been determined. We suggest the photobleach of adsorbed AO on the surface of researched films is a result of the oxidation reaction of dye molecule with the oxygen species such as singlet oxygen and OH • radical produced in the gas phase in presence of titania as well as in presence of sensitizer AO on silica surface. The observed photobleach of AO on the SiO 2 and SiO 2 /TiO 2 films proceeds through the photooxidative Ndemethylation of dimethylaminogroup in dye. Electronic and laser desorption/ionisation mass spectra give evidence that efficient photobleach of AO localized at the surface of anatase films proceeds through the following steps: 1-N-demethylation; 2-photodimerization; 3-photodegradation. Pure commercial TiO 2 P25 (S sp = 50 m 2 /g) does not adsorb some dyes (i.e. Rhodamine 6G (R6G), and process of a mineralization occurs on interface of TiO 2-solution R6G (3). However binary titania-silica catalyst with 10 % TiO 2 and S sp =100 m 2 /g adsorbs R6G from the solution, and process of its mineralization passes much more effectively compared with those on pure TiO 2 powders and coatings (7-10, 13-15). Mesoporous TiO 2 and TiO 2 /ZrO 2 films with developed surface area (400-800m 2 /g) show much higher activity in photoredox destruction of organic pollutants in comparison with their non-porous analogues (15-18). Aminoacridines, the representative acridine dyes, have ubiquitous use as colorant for synthetic fibers, tissue, leather etc (19-24), fluorophores with high fluorescente intensity on hydrophilic surfaces (20, 22, 23). At the same time this dyes represent some of the

Research paper thumbnail of Laser-Induced Electron-Transfer Processes in a Pyrene–β-Cyclodextrin Complex in Titanosilicate Systems

Theoretical and Experimental Chemistry

We have used fluorescent spectroscopy and laser flash photolysis to investigate the photonics of ... more We have used fluorescent spectroscopy and laser flash photolysis to investigate the photonics of pyrene molecules in a pyrene–-cyclodextrin inclusion complex in various media. We have observed a protective effect of -cyclodextrin relative to solubilized pyrene molecules during quenching of fluorescence by Ti ions (or titanium dioxide particles) in mixed colloids. In the presence of a precursor of silica (a TEOS solution), the pyrene molecules react with the colloidal silica particles formed, and the reaction is accompanied by decomposition of the pyrene–-cyclodextrin inclusion complex and efficient photoionization of pyrene.

Research paper thumbnail of Photodegradation and aggregation of acridine dyes adsorbed on the surface of mesoporous TiO2 films

Journal of Applied Spectroscopy, 2010

Electronic spectroscopy and laser desorption/ionization (LDI) mass spectrometry have been used to... more Electronic spectroscopy and laser desorption/ionization (LDI) mass spectrometry have been used to study the effects of UV exposure on acridine dyes such as acridine orange (AO) and acridine yellow (AY) adsorbed on the surface of mesoporous TiO 2 films. The main stages of the photodegradation process have been identified. The first one is photooxidative N-demethylation of the dimethylamino group in AO and deamination in AY. The following stages are photodimerization and photoaggregation on the superhydrophilic TiO 2 surface and further photocatalytic decomposition to the completely mineralized dyes.

Research paper thumbnail of Electron spectra of acridine yellow dye in the silicon dioxide matrix

Journal of Applied Spectroscopy, 1984

Research paper thumbnail of CdS nanoparticles in porous silicate glasses: energy characteristics, photocatalytic activity, and the effect of silver ion doping

Theoretical and Experimental Chemistry, 1998

Energy diagrams were constructed for CdS nanoparticles doped with silver ions and incorporated in... more Energy diagrams were constructed for CdS nanoparticles doped with silver ions and incorporated into silicate matrices, which are new nanostructural matericds. The effect of the amount of silver introduced on the efficiency of the photocatalytic evolution of hydrogen from aqueous sulfide-sulfite solutions was demonstrated, and the interrelationship between the photocatalytic activity of these materials and their energy characteristics was established.

Research paper thumbnail of Photocatalytic properties of mesoporous TiO2/ZrO2 films in gas-phase oxidation of alcohols

Theoretical and Experimental Chemistry, 2005

The photocatalytic activity of mesoporous TiO 2 modified by the addition of carbon nanotubes (CNT... more The photocatalytic activity of mesoporous TiO 2 modified by the addition of carbon nanotubes (CNTs) and Cu is reported. Nanocomposites of carbon nanotubes (CNTs) containing varying amounts of Cu were formed by treatment with Cu 2 þ then reduced to Cu 0 using NaBH 4 as the reducing agent. The mesoporous TiO 2 , synthesized by a sol-gel method from titanium isopropoxide, was combined with the CNT/Cu nanocomposites to form the photocatalysts which were characterized by XRD, SEM, TEM, FTIR, XPS and BET surface area analysis. The photocatalytic properties of the mesoporous TiO 2 composites were studied by measuring the degradation of methyl orange (MO) which was optimal in the sample containing 20 wt% of the Cu-CNT nanocomposite. The degradation efficiency for MO was a synergistic effect of photo-degradation of TiO 2 and may be due to improvement of the electrical conductivity of the system by the presence of the CNT/Cu networks, since the photodegradation of MO and the photocatalytic activity of the photoactive systems increased with increasing copper content.

Research paper thumbnail of Physical and Chemical Properties and Photocatalytic Activity of Nanostructured TiO2/CdS Films

Journal of Applied Spectroscopy, 2014

ABSTRACT Mesoporous titanium dioxide films obtained by the sol/gel template method are used as su... more ABSTRACT Mesoporous titanium dioxide films obtained by the sol/gel template method are used as supports for making TiO2/CdS nanoheterostructures. We show that the photocatalytic method results in formation of smaller CdS nanoparticles than chemical deposition. Photoelectrochemical measurements show more efficient spatial separation of photogenerated charges between components of the photocatalytically produced TiO2/CdS films, and consequently their participation in redox transformation of the xanthene dye Rose Bengal when exposed to UV light leads to higher quantum yields.

Research paper thumbnail of Optical Spectra and Morphology of Photochemically Produced Ag/Au Bimetallic Clusters

NATO Science for Peace and Security Series C: Environmental Security, 2008

The Ag-Au alloy and core-shell bimetallic nanoparticles (BMNP) in colloids can be successfully pr... more The Ag-Au alloy and core-shell bimetallic nanoparticles (BMNP) in colloids can be successfully prepared by photoinduced reduction of correspond-2 a d s (silica film with adsorbed Benzophenone) photocatalyst in water-IPA solution as a source of ketyl radicals and BP anionradicals as the reductive agents, and CTAB as a stabilizer. Generation of BMNP during the photochemical process happens right away of UV-irradiation. The alloy-to-core-shell structure occurs with time (from hours to days) and depends on the order of metal ions photoreduction, viz simultaneous or successive UV irradiation of silver and gold ions in solution, and varying of Ag/Au mole ratio. Ageing of photoproduced colloid nanocomposites accompanied by the change of structure from alloy to core-shell what is proved with UV-vis absorption spectra. Optical spectra demonstrate formation of core-shell structures, where the shell is enriched with the core atoms. For now, first conclusion should be that BMNP Ag:Au 1:1 in colloids are formed mainly with Au NP's in the shell. Photochemically produced and stabilized within pores of silica film Ag/Au BMNPs are formed as separate Ag and Au NP's, together with the big aggregates.

Research paper thumbnail of Mesoporous TiO2 and TiO2/ZnO/Ag films: Sol-Gel Synthesis, Photoelectrochemical and Photocatalytic Properties

NATO Science for Peace and Security Series C: Environmental Security, 2008

TiO 2 and TiO 2/ZnO films with silver nanoparticles (Ag NP's) distributed in the matrix ... more TiO 2 and TiO 2/ZnO films with silver nanoparticles (Ag NP's) distributed in the matrix and on the surface were characterized by TEM, AFM and UV-Vis spectroscopy. Direct photoelectrochemical investigations of the TiO 2/Ag and TiO 2/ZnO/Ag heterojunctions ...

Research paper thumbnail of Sol-Gel Synthesis of Mesoporous TiO2 Films for Visible Light Sensitive TiO2/CdS Heterostructures

NATO Science for Peace and Security Series C: Environmental Security, 2008

Mesoporous TiO 2 films were prepared by template assisted sol-gel method and used as support for ... more Mesoporous TiO 2 films were prepared by template assisted sol-gel method and used as support for deposition of CdS particles on its surface to produce visible light sensitive nanocomposites. The influence of the surface morphology of mesoporous titania matrix ...

Research paper thumbnail of Spectroscopic kinetic characteristics of the fluorescence of anthracene sorbed on silica gel

Theoretical and Experimental Chemistry, 1985

ABSTRACT

Research paper thumbnail of Spectral characteristics of the trypaflavine dye in a silica matrix

Theoretical and Experimental Chemistry, 1986

Calculating structural characteristics during investigation of the submicroscopic structure of co... more Calculating structural characteristics during investigation of the submicroscopic structure of concrete by small angle X-ray diffraction analysis," Zh.

Research paper thumbnail of Spectral parameters and photoprotolytic interactions for acridine adsorbed on silica

Journal of Applied Spectroscopy, 1990

Research paper thumbnail of Features of diffusion-controlled bimolecular reaction of fluorescence quenching in sol-gel-xerogel transitions

Theoretical and Experimental Chemistry, 1998

ABSTRACT

Research paper thumbnail of Donor-acceptor complexes of excited states on silica surface and in hexane solution at liquid nitrogen temperature

Research on Chemical Intermediates, 1998

It is shown that an exeiplex between pyrene (Py) and N,N-dimethylaniline (DMA) forms at low tempe... more It is shown that an exeiplex between pyrene (Py) and N,N-dimethylaniline (DMA) forms at low temperature (77 K) on the nonporous silica surface and in a solid hexane solution. The fluorescence lifetime of pyrene in the adsorption state increases when the quencher concentration grows at 77 K. The exciplex fluorescence spectra in the adsorption state shifts to a blue wavelength range when the temperature decreases as a result of the dipole-dipole interaction of the exciplex with the hydroxy groups of the silica surface. On the basis of the model suggested the hydroxyl group concentration on the dehydrated at 770 K silica surface has been estimated.

Research paper thumbnail of Photophysical properties of TICT molecule adsorbed on semiconductor titania–silica colloids

Journal of Photochemistry and Photobiology A: Chemistry, 2006

The effect of semiconductor titania–silica colloids on the fluorescent properties of adsorbed 4-(... more The effect of semiconductor titania–silica colloids on the fluorescent properties of adsorbed 4-(4′-N, N-diethylaminophenyl-3, 5-dimethyl-1, 7-diphenyl-bis-pyrazolo-[3, 4-b, 3′-e]-pyridine (DEA-DMPP) has been studied by steady-state and time-resolved fluorescence ...

Research paper thumbnail of Surface photochemistry: the organic charge-transfer complexes on silica

Journal of Molecular Structure, 1992

ABSTRACT

Research paper thumbnail of Conformational Control in Previtamin D Photosynthesis by Heterogeneous Media

Research on Chemical Intermediates

ABSTRACT

Research paper thumbnail of Photogeneration of nanosized gold on the surface of mesoporous silica modified by benzophenone

Theoretical and Experimental Chemistry, 2005

We have studied the photocatalytic activity of porous silicas (silica gel, mesoporous sol-gel fil... more We have studied the photocatalytic activity of porous silicas (silica gel, mesoporous sol-gel films) modified by benzophenone molecules, in the reaction of reduction of gold from tetrachloroaurate ions. Stable colloids of nanosized gold were obtained as a result of irradiating aqueous alcoholic solutions of HAuCl 4 •3H 2 O in the presence of the photocatalyst SiO 2-BP using as the stabilizers: a colloidal solution of silica (Ludox) or the surfactant sodium dodecyl sulfate (SDS). We have studied the effect of the stabilizer on the kinetics of the photoreduction reaction, and also on the shape and size of the nanoparticles formed.

Research paper thumbnail of Nature of the luminescence centers in amorphous silica

Theoretical and Experimental Chemistry, 1982

Research paper thumbnail of Spectroscopic and Mass-Spectrometric Study of Acridine Orange Photodegradation on the Surface of Mesoporous TiO2, SiO2 /TiO2 and SiO2 Films

Journal of Advanced Oxidation Technologies, 2008

The efficiency of nanosized mesoporous TiO 2 , SiO 2 /TiO 2 and SiO 2 films as photocatalytic cov... more The efficiency of nanosized mesoporous TiO 2 , SiO 2 /TiO 2 and SiO 2 films as photocatalytic coverings has been demonstrated by the example of adsorbed acridine orange (AO) dye photodegradation in air. SiO 2-and TiO 2-based functional coatings were prepared via template assisted sol-gel method. The films were characterized by electron microscopy (SEM, TEM), FTIR and UV-Vis spectroscopy. Hydrophylic properties of prepared films were estimated from the water contact angle measurements. Electronic spectra and LDI mass-spectra changes accompanying AO photodegradation under the UV-exposure were investigated and main photodestruction products have been determined. We suggest the photobleach of adsorbed AO on the surface of researched films is a result of the oxidation reaction of dye molecule with the oxygen species such as singlet oxygen and OH • radical produced in the gas phase in presence of titania as well as in presence of sensitizer AO on silica surface. The observed photobleach of AO on the SiO 2 and SiO 2 /TiO 2 films proceeds through the photooxidative Ndemethylation of dimethylaminogroup in dye. Electronic and laser desorption/ionisation mass spectra give evidence that efficient photobleach of AO localized at the surface of anatase films proceeds through the following steps: 1-N-demethylation; 2-photodimerization; 3-photodegradation. Pure commercial TiO 2 P25 (S sp = 50 m 2 /g) does not adsorb some dyes (i.e. Rhodamine 6G (R6G), and process of a mineralization occurs on interface of TiO 2-solution R6G (3). However binary titania-silica catalyst with 10 % TiO 2 and S sp =100 m 2 /g adsorbs R6G from the solution, and process of its mineralization passes much more effectively compared with those on pure TiO 2 powders and coatings (7-10, 13-15). Mesoporous TiO 2 and TiO 2 /ZrO 2 films with developed surface area (400-800m 2 /g) show much higher activity in photoredox destruction of organic pollutants in comparison with their non-porous analogues (15-18). Aminoacridines, the representative acridine dyes, have ubiquitous use as colorant for synthetic fibers, tissue, leather etc (19-24), fluorophores with high fluorescente intensity on hydrophilic surfaces (20, 22, 23). At the same time this dyes represent some of the

Research paper thumbnail of Laser-Induced Electron-Transfer Processes in a Pyrene–β-Cyclodextrin Complex in Titanosilicate Systems

Theoretical and Experimental Chemistry

We have used fluorescent spectroscopy and laser flash photolysis to investigate the photonics of ... more We have used fluorescent spectroscopy and laser flash photolysis to investigate the photonics of pyrene molecules in a pyrene–-cyclodextrin inclusion complex in various media. We have observed a protective effect of -cyclodextrin relative to solubilized pyrene molecules during quenching of fluorescence by Ti ions (or titanium dioxide particles) in mixed colloids. In the presence of a precursor of silica (a TEOS solution), the pyrene molecules react with the colloidal silica particles formed, and the reaction is accompanied by decomposition of the pyrene–-cyclodextrin inclusion complex and efficient photoionization of pyrene.

Research paper thumbnail of Photodegradation and aggregation of acridine dyes adsorbed on the surface of mesoporous TiO2 films

Journal of Applied Spectroscopy, 2010

Electronic spectroscopy and laser desorption/ionization (LDI) mass spectrometry have been used to... more Electronic spectroscopy and laser desorption/ionization (LDI) mass spectrometry have been used to study the effects of UV exposure on acridine dyes such as acridine orange (AO) and acridine yellow (AY) adsorbed on the surface of mesoporous TiO 2 films. The main stages of the photodegradation process have been identified. The first one is photooxidative N-demethylation of the dimethylamino group in AO and deamination in AY. The following stages are photodimerization and photoaggregation on the superhydrophilic TiO 2 surface and further photocatalytic decomposition to the completely mineralized dyes.

Research paper thumbnail of Electron spectra of acridine yellow dye in the silicon dioxide matrix

Journal of Applied Spectroscopy, 1984

Research paper thumbnail of CdS nanoparticles in porous silicate glasses: energy characteristics, photocatalytic activity, and the effect of silver ion doping

Theoretical and Experimental Chemistry, 1998

Energy diagrams were constructed for CdS nanoparticles doped with silver ions and incorporated in... more Energy diagrams were constructed for CdS nanoparticles doped with silver ions and incorporated into silicate matrices, which are new nanostructural matericds. The effect of the amount of silver introduced on the efficiency of the photocatalytic evolution of hydrogen from aqueous sulfide-sulfite solutions was demonstrated, and the interrelationship between the photocatalytic activity of these materials and their energy characteristics was established.

Research paper thumbnail of Photocatalytic properties of mesoporous TiO2/ZrO2 films in gas-phase oxidation of alcohols

Theoretical and Experimental Chemistry, 2005

The photocatalytic activity of mesoporous TiO 2 modified by the addition of carbon nanotubes (CNT... more The photocatalytic activity of mesoporous TiO 2 modified by the addition of carbon nanotubes (CNTs) and Cu is reported. Nanocomposites of carbon nanotubes (CNTs) containing varying amounts of Cu were formed by treatment with Cu 2 þ then reduced to Cu 0 using NaBH 4 as the reducing agent. The mesoporous TiO 2 , synthesized by a sol-gel method from titanium isopropoxide, was combined with the CNT/Cu nanocomposites to form the photocatalysts which were characterized by XRD, SEM, TEM, FTIR, XPS and BET surface area analysis. The photocatalytic properties of the mesoporous TiO 2 composites were studied by measuring the degradation of methyl orange (MO) which was optimal in the sample containing 20 wt% of the Cu-CNT nanocomposite. The degradation efficiency for MO was a synergistic effect of photo-degradation of TiO 2 and may be due to improvement of the electrical conductivity of the system by the presence of the CNT/Cu networks, since the photodegradation of MO and the photocatalytic activity of the photoactive systems increased with increasing copper content.

Research paper thumbnail of Physical and Chemical Properties and Photocatalytic Activity of Nanostructured TiO2/CdS Films

Journal of Applied Spectroscopy, 2014

ABSTRACT Mesoporous titanium dioxide films obtained by the sol/gel template method are used as su... more ABSTRACT Mesoporous titanium dioxide films obtained by the sol/gel template method are used as supports for making TiO2/CdS nanoheterostructures. We show that the photocatalytic method results in formation of smaller CdS nanoparticles than chemical deposition. Photoelectrochemical measurements show more efficient spatial separation of photogenerated charges between components of the photocatalytically produced TiO2/CdS films, and consequently their participation in redox transformation of the xanthene dye Rose Bengal when exposed to UV light leads to higher quantum yields.

Research paper thumbnail of Optical Spectra and Morphology of Photochemically Produced Ag/Au Bimetallic Clusters

NATO Science for Peace and Security Series C: Environmental Security, 2008

The Ag-Au alloy and core-shell bimetallic nanoparticles (BMNP) in colloids can be successfully pr... more The Ag-Au alloy and core-shell bimetallic nanoparticles (BMNP) in colloids can be successfully prepared by photoinduced reduction of correspond-2 a d s (silica film with adsorbed Benzophenone) photocatalyst in water-IPA solution as a source of ketyl radicals and BP anionradicals as the reductive agents, and CTAB as a stabilizer. Generation of BMNP during the photochemical process happens right away of UV-irradiation. The alloy-to-core-shell structure occurs with time (from hours to days) and depends on the order of metal ions photoreduction, viz simultaneous or successive UV irradiation of silver and gold ions in solution, and varying of Ag/Au mole ratio. Ageing of photoproduced colloid nanocomposites accompanied by the change of structure from alloy to core-shell what is proved with UV-vis absorption spectra. Optical spectra demonstrate formation of core-shell structures, where the shell is enriched with the core atoms. For now, first conclusion should be that BMNP Ag:Au 1:1 in colloids are formed mainly with Au NP's in the shell. Photochemically produced and stabilized within pores of silica film Ag/Au BMNPs are formed as separate Ag and Au NP's, together with the big aggregates.

Research paper thumbnail of Mesoporous TiO2 and TiO2/ZnO/Ag films: Sol-Gel Synthesis, Photoelectrochemical and Photocatalytic Properties

NATO Science for Peace and Security Series C: Environmental Security, 2008

TiO 2 and TiO 2/ZnO films with silver nanoparticles (Ag NP's) distributed in the matrix ... more TiO 2 and TiO 2/ZnO films with silver nanoparticles (Ag NP's) distributed in the matrix and on the surface were characterized by TEM, AFM and UV-Vis spectroscopy. Direct photoelectrochemical investigations of the TiO 2/Ag and TiO 2/ZnO/Ag heterojunctions ...

Research paper thumbnail of Sol-Gel Synthesis of Mesoporous TiO2 Films for Visible Light Sensitive TiO2/CdS Heterostructures

NATO Science for Peace and Security Series C: Environmental Security, 2008

Mesoporous TiO 2 films were prepared by template assisted sol-gel method and used as support for ... more Mesoporous TiO 2 films were prepared by template assisted sol-gel method and used as support for deposition of CdS particles on its surface to produce visible light sensitive nanocomposites. The influence of the surface morphology of mesoporous titania matrix ...