Photocatalytic activity and photo-induced superhydrophilicity of sol–gel derived TiO2 films

Langlet, M.; Permpoon, Siriwan; Riassetto, David; Berthomé, G.; Pernot, Etienne; Joud, J.C.

doi:10.1016/j.jphotochem.2005.11.026

Cited by 72 publications

(44 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The preparation essentially relied on the autoclaving of a modified MS solution, which finally yielded a CS with a 0.24 M concentration of TiO 2 crystallites in ethanol. Both MS and CS protocols have been fully detailed in our previous papers [37,38]. TiO 2 films were then deposited at room temperature on (100) silicon wafers or soda-lime glasses (3.3 Â 3.3 cm À2 ) by spin coating.…”

Section: Methodsmentioning

confidence: 99%

“…The room temperature MS and CS deposition yielded a wet amorphous gel film and a wet crystalline film, respectively. MS-derived TiO 2 films were crystallised by heating at 500 C for 2 h. CS-derived TiO 2 films were only dried at 110 C for 2 h. Our previous studies showed that both the procedures yielded well-crystallised TiO 2 films, which in turn governed their photocatalytic activities [37,38]. The MS and CS TiO 2 film thicknesses were fixed at 250 and 300 nm, respectively, using a multilayer deposition procedure.…”

Section: Methodsmentioning

confidence: 99%

“…As illustrated in Figure 12(b) and (c), this growth mechanism does not totally proceed homogeneously, and it yields some broadening in the size distribution of silver particles distributed at the film surface. We have shown that the photocatalytic activity of CS TiO 2 films can be flexibly monitored through variations in the film thickness [37,38]. Thus, in future studies, it will be interesting to test how variations in the film photoactivity, in relation to other experimental parameters, can eventually reduce the size distribution of AIP-derived silver particles.…”

Section: Extrapolation To Gold Nanoparticles Through a 2-step Aip Promentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Riassetto¹,

Roussel²,

Rapenne³

et al. 2010

Journal of Experimental Nanoscience

View full text Add to dashboard Cite

The photochemical reduction of metal precursors under UV light has been studied to produce noble metal nanoparticles. Depending on the metal (Pt, Au or Ag) and precursor (chlorinated or nitrate) natures, different 1-step or 2-step photolytic or photocatalytic reduction mechanisms have been investigated. These mechanisms yield simple all-inorganic methods to generate metal nanoparticles in liquid medium and disperse these particles at the surface of various kinds of supports. Depending on the metal particle and support natures, different functionalities can arise from such easy and low-cost photometallisation methods.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Extrapolation To Gold Nanoparticles Through a 2-step Aip Promentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Riassetto¹,

Roussel²,

Rapenne³

et al. 2010

Journal of Experimental Nanoscience

View full text Add to dashboard Cite

show abstract

“…Metal oxide thin films for self-cleaning applications can be deposited by a wide variety of techniques such as sol-gel, spray pyrolysis, liquid phase deposition, physical vapor deposition Chemical deposition, hydrothermal methods [101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116][117][118][119]. In physical and chemical vapour deposition techniques many parameters like pressure, substrate temperature, power density, gas flow rates are available to control properties of films.…”

Section: Synthesis and Fabricationmentioning

confidence: 99%

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Krishna

Madhurima

Purkayastha

2013

Eur. Phys. J. Appl. Phys.

View full text Add to dashboard Cite

Abstract. Surfaces that exhibit reversible wettability toward water are extremely important for a variety of technological applications. In this context, the development of superhydrophobic and superhydrophilic surfaces for self-cleaning applications has been receiving a great deal of attention in the last few years. In this review, an overview of the current state-of-science and technology of self-cleaning surfaces is presented. The current understanding of physics of wetting leading to surfaces with predictive, controllable and reversible wettability is first presented. The review then focuses on materials, mainly metal oxides and their composites, employed for self-cleaning applications. It is shown that, although conventionally oxides and polymers are considered for self-cleaning applications, recent developments point toward the use of artificially engineered surfaces with hierarchical roughness. Applications of self-cleaning films in nonconventional areas such as protection of fabrics, solar cells and structures related to cultural heritage are discussed. The review ends with an outlook for the future in terms of science and technology of self-cleaning surfaces.

show abstract

“…Alternatively, a temporary superhydrophilic state (water contact angle < 10%) of titania can be obtained by exposition to ultraviolet light. [6,7,16,17].…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic and optical properties of nanostructured titania prepared by sol–gel dip coating

Ferrara¹,

Pilloni²,

Mazzarelli³

et al. 2010

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Nanostructured titania thin films were prepared under controlled atmospheric conditions by sol-gel dip-coating technique on glass, fused silica and (100)-silicon substrates. Two different sol-gel routes were employed by using different precursor solutions, a highly acid solution and a polymer-like solution. The influence of sol composition and of the substrate type on the morphology, coating porosity, surface roughness, crystalline phases and grain size of the titania films were investigated in detail. In addition, the relationship between microstructural/morphological properties and the optical properties (energy gap, refractive index and extinction coefficient) and the hydrophilic performance of the coatings were evaluated. Our experimental results clearly indicate that the sol composition and substrate type remarkably influence the films morphology and microstructure, moreover they consequently modify the optical response and hydrophilic performances of the samples, showing that superhydrophilic titania coatings can be obtained opportunely by choosing the composition of the precursors sol-gel solution. Blue shift of the band gap energy and a band structure mutation from indirect to direct were also revealed. The hydrophilic properties and the change of the band gaps transition can be attributed to oxygen vacancy on the surface of the titania nanocrystallites that gives rise to Ti 3+ sites and, consequently, to structural changes/defects of the anatase nanoarchitecture. These findings allow us to design and tailor the optical and hydrophilic properties of the titania coatings.

show abstract

Photocatalytic activity and photo-induced superhydrophilicity of sol–gel derived TiO2 films

Cited by 72 publications

References 22 publications

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Synthesis and functionalities of noble metal nanoparticles formed through simple all-inorganic photochemical procedures

Metal oxide thin films and nanostructures for self-cleaning applications: current status and future prospects

Hydrophilic and optical properties of nanostructured titania prepared by sol–gel dip coating

Contact Info

Product

Resources

About