Selective performance of sol-gel synthesised titanium dioxide photocatalysts in aqueous oxidation of various-type organic pollutants

Klauson, Deniss; Budarnaja, Olga; Степанова, К. В.; Krichevskaya, Marina; Dedova, Tatjana; Käkinen, Aleksandr; Preis, Sergei

doi:10.1134/s0023158414010030

Cited by 8 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to many authors, carbon doping enhances photocatalytic activity under visible light [25,54,55,56,57,58,59]. Therefore, some of the films were tested for the ability to degrade the stearic acid layer under VIS light (Figure 7b).…”

Section: Resultsmentioning

confidence: 99%

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

et al. 2019

Self Cite

View full text Add to dashboard Cite

TiO2 thin films with different titanium isopropoxide (TTIP):acetylacetone (AcacH) molar ratios in solution were prepared by the chemical spray pyrolysis method. The TTIP:AcacH molar ratio in spray solution varied from 1:3 to 1:20. TiO2 films were deposited onto the glass substrates at 350 °C and heat-treated at 500 °C. The morphology, structure, surface chemical composition, and photocatalytic activity of the obtained TiO2 films were investigated. TiO2 films showed a transparency of ca 80% in the visible spectral region and a band gap of ca 3.4 eV irrespective of the TTIP:AcacH molar ratio in the spray solution. TiO2 films consist of the anatase crystalline phase with a mean crystallite size in the range of 30–40 nm. Self-cleaning properties of the films were estimated using the stearic acid (SA) test. A thin layer of 8.8-mM SA solution was spin-coated onto the TiO2 film. The degradation rate of SA as a function of irradiation time was monitored by Fourier-transform infrared spectroscopy (FTIR). An increase in the TTIP:AcacH molar ratio from 1:4 to 1:8 resulted in a ten-fold increase in the photodegradation reaction rate constant (from 0.02 to the 0.2 min−1) under ultraviolet light and in a four-fold increase under visible light.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The objects of the present investigation are metallic copper and TiO 2 anatase nanoparticles. Copper nanoparticles are important component of many photocatalytic and catalytic systems. − Titanium dioxide in anatase phase is very active, stable photocatalyst, ,− active component and support for catalysts of partial and complete oxidation and reduction, component of dye sensitized solar cells, lithium batteries, sensors, and electronic devices. , Most interesting physical-chemical and functional properties of copper and anatase nanoparticles are observed at a size of few nanometers.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu⁰ and TiO₂ Anatase

Vorontsov

Tsybulya

2018

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The effect of nanoparticle size and structure on XRD and SAXS patterns was investigated using modeling with the Debye scattering equation for a series of nanoparticles (NP) with the positions of atoms kept according to the bulk lattice and after structure relaxation. The purpose of research was to determine if the changes in XRD peak positions for NP are entirely due to the well-known effects of lattice parameter change or if additional effects can arise from the size itself. It was found that for very small NPs with sizes below 5 nm, the size itself influences the XRD patterns. This effect can be caused by interference fringes and is not taken into account when considering XRD patterns in standard software. The research demonstrates that new methods for XRD pattern treatment of very small nanoparticles should be developed.

show abstract

Benchmarking semiempirical and DFT methods for the interaction of thiophene and diethyl sulfide molecules with a Ti(OH)4(H2O) cluster

Vorontsov

Smirniotis

2017

J Mol Model

View full text Add to dashboard Cite

Semiempirical methods pm6 and pm7 as well as density functional theory functionals exchange LSDA, exchange-correlation PW91 and PBE, hybrid B3LYP1 and PBE0 were compared for energy and geometry of thiophene, diethyl sulfide (DES) molecules and their binding to a frozen Ti(OH)(HO) complex having one coordinatively unsaturated Ti site representing small fragment of TiO anatase (001) surface. PBE0/6-31G(d) with DFT-D3 dispersion correction was the best method for description of thiophene and DES molecules geometries as comparison with experimental data demonstrated. Semiempirical methods pm6 and pm7 resulted in only three of four possible binding configurations of thiophene with the Ti(OH)(HO) complex while pm7 described correctly the enthalpy and all configurations of DES binding with the Ti(OH)(HO) complex. SBKJC pseudopotential and LSDA with and without dispersion correction produced flawed results for many configurations. PBE0 and PBE with and without dispersion correction and PW91 with 6-31G(d) basis set systematically produced dependable results for thiophene and DES binding to the Ti(OH)(HO) complex. PBE0-D3/6-31G(d), B3LYP1-D3/6-31G(d), and PBE-D3/6-31G(d) gave best match of binding energy for thiophene while PBE0/6-31G(d) gave best match of DES binding energy as comparison with CCSD(T) energy demonstrated. On the basis of the superior results obtained with PBE0/6-31G(d), it is the recommended method for modeling of adsorption over TiO surfaces. Such a conclusion is in agreement with recent literature.

show abstract

Selective performance of sol-gel synthesised titanium dioxide photocatalysts in aqueous oxidation of various-type organic pollutants

Cited by 8 publications

References 35 publications

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu⁰ and TiO₂ Anatase

Benchmarking semiempirical and DFT methods for the interaction of thiophene and diethyl sulfide molecules with a Ti(OH)4(H2O) cluster

Contact Info

Product

Resources

About

Selective performance of sol-gel synthesised titanium dioxide photocatalysts in aqueous oxidation of various-type organic pollutants

Cited by 8 publications

References 35 publications

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

Effect of the Titanium Isopropoxide:Acetylacetone Molar Ratio on the Photocatalytic Activity of TiO2 Thin Films

Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu0 and TiO2 Anatase

Benchmarking semiempirical and DFT methods for the interaction of thiophene and diethyl sulfide molecules with a Ti(OH)4(H2O) cluster

Contact Info

Product

Resources

About

Influence of Nanoparticles Size on XRD Patterns for Small Monodisperse Nanoparticles of Cu⁰ and TiO₂ Anatase