Pure and Nanocomposite Thin Films Based on TiO2 Prepared by Sol-Gel Process: Characterization and Applications

Mohallem, Nelcy Della Santina; Viana, Marcelo Machado; Jesus, MagnumAugusto Moraes Lopes de; Gomes, Gustavo H.M.; Lima, Luiz Fernando de; Alves, E.

doi:10.5772/intechopen.74335

Cited by 9 publications

(5 citation statements)

References 14 publications

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“…Therefore, the resultant film has a dense structure. These results are in good agreement with several works reported in the literature [20,31,[42][43][44].…”

Section: Development Of Tio2 Coatingssupporting

confidence: 93%

“…They obtained only a slight increase with the increase in WS, but transmittance at =550 nm is measured as ~68% for these thick (80-123 nm) titania films. Mohallem et al [44] investigated the optical transmittance of TiO2 films for low withdrawal speeds of 12-90 mm/min. The thickness of their films were changed from 40 to 800 nm, depending on the WS, but none of their film achieved to reach over the transmittance of glass (~78% at =550 nm for 40 nm thick TiO2 films).…”

Section: Development Of Tio2 Coatingsmentioning

confidence: 99%

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Preparation of single- and double-layer antireflective coatings by sol-gel method

İkizler¹

2019

Res. Eng. Struct. Mater.

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“…Therefore, the resultant film has a dense structure. These results are in good agreement with several works reported in the literature [20,31,[42][43][44].…”

Section: Development Of Tio2 Coatingssupporting

confidence: 93%

Section: Development Of Tio2 Coatingsmentioning

confidence: 99%

Preparation of single- and double-layer antireflective coatings by sol-gel method

İkizler¹

2019

Res. Eng. Struct. Mater.

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“…The sol-gel process allows obtaining nanostructured thin films following the steps shown in Figure 2 and using the dip-coating technique (which involves immersing a substrate in the sol and retiring it at a constant speed) [30]. Chen et al developed a urea biosensor based on the immobilization of urease onto a TiO 2 nanoporous film.…”

Section: Sol-gelmentioning

confidence: 99%

Nanostructured Titanium Dioxide Surfaces for Electrochemical Biosensing

Bertel

Miranda

García-Martín

2021

Sensors

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TiO2 electrochemical biosensors represent an option for biomolecules recognition associated with diseases, food or environmental contaminants, drug interactions and related topics. The relevance of TiO2 biosensors is due to the high selectivity and sensitivity that can be achieved. The development of electrochemical biosensors based on nanostructured TiO2 surfaces requires knowing the signal extracted from them and its relationship with the properties of the transducer, such as the crystalline phase, the roughness and the morphology of the TiO2 nanostructures. Using relevant literature published in the last decade, an overview of TiO2 based biosensors is here provided. First, the principal fabrication methods of nanostructured TiO2 surfaces are presented and their properties are briefly described. Secondly, the different detection techniques and representative examples of their applications are provided. Finally, the functionalization strategies with biomolecules are discussed. This work could contribute as a reference for the design of electrochemical biosensors based on nanostructured TiO2 surfaces, considering the detection technique and the experimental electrochemical conditions needed for a specific analyte.

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“…The good uniformity of the thin films obtained by dip-coating technique can be reached due to the layer-by-layer growth during each dip process of the substrate in the precursor solution [ 43 ]. The sol-gel dip-coating technique is essentially based on mechanisms of hydrolysis and polycondensation of titanium alkoxides mixed with alcohol and catalytic agents [ 35 , 44 ].…”

Section: Introductionmentioning

confidence: 99%

Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation

HAMDI¹,

MANSOURI²,

SRIVASTAVA³

et al. 2022

Turkish Journal of Chemistry

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Cerium (Ce) and europium (Eu)-doped TiO 2 thin films were obtained by sol-gel dip-coating technique. SEM micrographs showed that the surfaces are covered by agglomerated particles due to the repeating coating process. XRD patterns showed the presence of TiO 2 anatase phase. Raman spectra revealed that the peaks recorded at 146 cm −1 (E g ) and 397 cm −1 (B 1g ) were related to the anatase phase. EIS measurements proved that Ce-TiO 2 (1wt%) and Eu-TiO 2 (0.1wt%) photocatalysts possessed a lower electron transfer resistance than pure TiO 2 , which can lead to effective separation of electron/ hole pairs during the photoreactions. The photoactivity of Ce and Eu-doped TiO 2 was investigated by the degradation of amido black10B dye (AB) under UV excitation and varying the initial pH and concentrations. It was found that Eu-TiO 2 (0.1wt%) exhibited higher photocatalytic activity, reaching a first-order reaction rate of k app (0.036min −1 ), t 1/2 was around 12 min and AB removal was 98.94%, under optimal pH of 3.5 and AB concentration of 10ppm compared to (t 1/2 = 45 min, t 1/2 =30 min), ( k app = 0.022 min −1 , k app =0.026min −1 ) and AB removal (94.78%, 96.44%), respectively for pure TiO 2 and Ce-TiO 2 (1wt%). Further increase in Eu/Ce amount up to optimal concentration (1wt% Ce and 0.1wt% Eu) led to a decrease in the AB removal. The mineralization of AB using Eu-TiO 2 photocatalyst was confirmed by HPLC analysis.

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Pure and Nanocomposite Thin Films Based on TiO2 Prepared by Sol-Gel Process: Characterization and Applications

Cited by 9 publications

References 14 publications

Preparation of single- and double-layer antireflective coatings by sol-gel method

Preparation of single- and double-layer antireflective coatings by sol-gel method

Nanostructured Titanium Dioxide Surfaces for Electrochemical Biosensing

Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation

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