Activity enhanced TiO2 nanomaterials for photodegradation of dyes- A Review

Sn-doped TiO2 nanomaterials were synthesized by sol–gel method. It was shown the phase compositions and phase transitions change with the introduction of different tin amounts (0.5–20[Formula: see text]mol.%). X-ray powder diffraction was used to study the effect of different tin amounts on the anatase–rutile phase transition. It was found that the introduction of ions increases the thermal stability of anatase modifications. The material’s photocatalytic activity was studied in reaction with a model pollutant (methylene blue) photodegradation under UV and visible light activation. The best photocatalytic properties were shown for material, which contains 5[Formula: see text]mol.% of Sn.

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How Can the Introduction of Zr4+ Ions into TiO2 Nanomaterial Impact the DSSC Photoconversion Efficiency? A Comprehensive Theoretical and Experimental Consideration

Materials ◽

10.3390/ma14112955 ◽

2021 ◽

Vol 14 (11) ◽

pp. 2955

Author(s):

Aleksandra Bartkowiak ◽

Oleksandr Korolevych ◽

Gian Luca Chiarello ◽

Malgorzata Makowska-Janusik ◽

Maciej Zalas

Keyword(s):

Density Functional ◽

Sol Gel ◽

Dye Sensitized Solar Cells ◽

Positive Influence ◽

Photoconversion Efficiency ◽

Doped Tio2 ◽

Computational Calculations ◽

Tio2 Nanomaterials ◽

First Time ◽

Sensitized Solar Cells

A series of pure and doped TiO2 nanomaterials with different Zr4+ ions content have been synthesized by the simple sol-gel method. Both types of materials (nanopowders and nanofilms scratched off of the working electrode’s surface) have been characterized in detail by XRD, TEM, and Raman techniques. Inserting dopant ions into the TiO2 structure has resulted in inhibition of crystal growth and prevention of phase transformation. The role of Zr4+ ions in this process was explained by performing computer simulations. The three structures such as pure anatase, Zr-doped TiO2, and tetragonal ZrO2 have been investigated using density functional theory extended by Hubbard correction. The computational calculations correlate well with experimental results. Formation of defects and broadening of energy bandgap in defected Zr-doped materials have been confirmed. It turned out that the oxygen vacancies with substituting Zr4+ ions in TiO2 structure have a positive influence on the performance of dye-sensitized solar cells. The overall photoconversion efficiency enhancement up to 8.63% by introducing 3.7% Zr4+ ions into the TiO2 has been confirmed by I-V curves, EIS, and IPCE measurements. Such efficiency of DSSC utilizing the working electrode made by Zr4+ ions substituted into TiO2 material lattice has been for the first time reported.

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Grain-size-dependent gas-sensing properties of TiO2 nanomaterials

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2015.01.050 ◽

2015 ◽

Vol 211 ◽

pp. 67-76 ◽

Cited By ~ 28

Author(s):

B. Lyson-Sypien ◽

M. Radecka ◽

M. Rekas ◽

K. Swierczek ◽

K. Michalow-Mauke ◽

...

Keyword(s):

Grain Size ◽

Gas Sensing ◽

Sensing Properties ◽

Size Dependent ◽

Gas Sensing Properties ◽

Tio2 Nanomaterials

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Low Temperature Synthesis of Photocatalytic Mesoporous TiO2 Nanomaterials

Catalysts ◽

10.3390/catal10080893 ◽

2020 ◽

Vol 10 (8) ◽

pp. 893 ◽

Cited By ~ 3

Author(s):

Massimo Dell’Edera ◽

Francesca Petronella ◽

Alessandra Truppi ◽

Leonarda Francesca Liotta ◽

Nunzio Gallì ◽

...

Keyword(s):

Thermal Treatment ◽

Room Temperature ◽

Mesoporous Tio2 ◽

Aqueous Alkaline Solution ◽

Tio2 Nanocrystals ◽

Low Temperature Synthesis ◽

Temperature Synthesis ◽

Tio2 Nanomaterials ◽

The Relationship ◽

Tio2 Nanostructures

We report the synthesis of mesoporous TiO2 nanostructures based on the decomposition of TiOSO4 in aqueous alkaline solution at room temperature, followed by mild thermal treatment (110 °C) in an oven and suitable to yield up to 40 g of product per batch. The duration of the thermal treatment was found to be crucial to control crystalline phase composition, specific surface area, surface chemistry and, accordingly, the photocatalytic properties of the obtained TiO2 nanocrystals. The thorough investigation of the prepared samples allowed us to explain the relationship between the structure of the obtained nanoparticles and their photocatalytic behavior, that was tested in a model reaction. In addition, the advantage of the mild treatment against a harsher calcination at 450 °C was illustrated. The proposed approach represents a facile and sustainable route to promptly access an effective photocatalyst, thus holding a significant promise for the development of solutions suitable to real technological application in environmental depollution.

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Influence of TiO2 Nanocrystals on Alkyd Resin Paint Films to Protect Metals

Asian Journal of Chemical Sciences ◽

10.9734/ajocs/2020/v8i419058 ◽

2020 ◽

pp. 87-94

Author(s):

Le Huy Hai ◽

Le Mai Xuan Truc ◽

Nguyen Quoc Trung

Keyword(s):

Alkyd Resin ◽

Paint Film ◽

Powder Coating ◽

Nano Tio2 ◽

Actual Equipment ◽

Study Results ◽

Tio2 Nanomaterials ◽

Paint Films ◽

The Impact ◽

Over Time

Aim and Objectives: Nowadays, nanomaterials technology is developing very quickly and bringing high economic efficiency for many industries including paint. The purpose of this study is to assess the effect of paint properties when replacing TiO2 powder coating with nano TiO2 at different ratios. Materials and Methods: The research method is selecting the traditional alkyd paint formula, then replacing this coating powder TiO2 with nano TiO2 to monitor the properties of the paint film over time. Methods of analyzing the properties of the paint film are based on Vietnam standards. Results: The study results showed that TiO2 coating powder replaced by TiO2 nanomaterials has increased the properties of the paint film, improving the thickness, gloss, and durability of the paint film. Nano TiO2 increases from 0.5% to 24% by weight, the impact increased by about 11% (73 to 82 kg.cm), Glossy 60° increased by about 12%, Glossy 85° increased by about 12%, especially the durability of paint film over time increased nearly double. Nano TiO2 is a more expensive material than TiO2, so it should replace less than 4% by weight to increase the quality of the paint film, this ratio is changed according to the actual equipment requirements. Conclusions: The higher the rate of replacing TiO2 materials with TiO2 nano, the better the properties of the paint film. Therefore, nano-material TiO2 is a good coating in alkyd resin for metal paint, it improves the properties of paint film better than TiO2 material.

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Lanthanide organic frameworks@TiO2 nanomaterials: luminescence and highly efficient photodegradation of phenol

10.31708/spi3.18/parn.cns18 ◽

2018 ◽

Author(s):

Patrycja Parnicka ◽

◽

Adriana Zaleska-Medynska ◽

Keyword(s):

Highly Efficient ◽

Tio2 Nanomaterials

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Toxicity of pristine and paint-embedded TiO2 nanomaterials

Human & Experimental Toxicology ◽

10.1177/0960327118774910 ◽

2018 ◽

Vol 38 (1) ◽

pp. 11-24 ◽

Cited By ~ 7

Author(s):

AT Saber ◽

A Mortensen ◽

J Szarek ◽

NR Jacobsen ◽

M Levin ◽

...

Keyword(s):

Dna Damage ◽

Titanium Dioxide ◽

Single Dose ◽

Pulmonary Inflammation ◽

Similar Type ◽

Liver Histology ◽

Pulmonary Exposure ◽

Phase Inclusion ◽

Different Types ◽

Tio2 Nanomaterials

Little is known on the toxicity of nanomaterials in the user phase. Inclusion of nanomaterials in paints is a common nanotechnology application. This study focuses on the toxicity of dusts from sanding of paints containing nanomaterials. We compared the toxicity of titanium dioxide nanomaterials (TiO2NMs) and dusts generated by sanding boards coated with paints with different amounts of two different types of uncoated TiO2NMs (diameters:10.5 nm and 38 nm). Mice were intratracheally instilled with a single dose of 18, 54 and 162 µg of TiO2NMs or 54, 162 and 486 µg of sanding dusts. At 1, 3 and 28 days post-instillation, we evaluated pulmonary inflammation, liver histology and DNA damage in lung and liver. Pulmonary exposure to both pristine TiO2NMs and sanding dusts with different types of TiO2NMs resulted in dose-dependently increased influx of neutrophils into the lung lumen. There was no difference between the sanding dusts from the two paints. For all exposures but not in vehicle controls, mild histological lesions were observed in the liver. Pulmonary exposure to pristine TiO2NMs and paint dusts with TiO2NMs caused similar type of histological lesions in the liver.

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