Mechanical properties of mesoporous silica thin films: Effect of the surfactant removal processes

Chemin, Nicolas; Klotz, Michaela; Rouessac, V.; Ayral, A.; Barthel, Étienne

doi:10.1016/j.tsf.2005.08.260

Cited by 30 publications

(39 citation statements)

References 12 publications

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“…The films obtained with a Copo/Si ratio of 0.01 have been fully characterized. [21,22] The total pore volume fraction within the film is ca. 38 %, distributed both as micropores (i.e., pores with a diameter of a few Angstroms) and mesopores (size of 5 to 6 nm).…”

Section: Resultsmentioning

confidence: 99%

Transparent Mesoporous Nanocomposite Films for Self‐Cleaning Applications

Allain

Besson

Durand

et al. 2007

Adv Funct Materials

113

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A versatile approach is studied for the elaboration of TiO2 based photocatalytic coatings for self‐cleaning applications on transparent substrates. The basic principle of the synthesis relies on the use of preformed TiO2 colloidal particles that are further dispersed within a transparent silica binder with a mesoporous structure. Film porosity in the nanometer range is controlled by achieving the sol–gel silica condensation around self‐organized micellar assemblies of a templating copolymer surfactant. The latter also acts as a stabilizer for the TiO2 particles, thus preserving their high dispersion within the film so that excellent optical properties are maintained even for high TiO2 loading (up to 50 %). Studies of photodegradation kinetics show that such mesoporous films are at least 15 times more active than films synthesized with a usual microporous silica binder. Moreover, the measured quantum‐yield efficiency (1.1 %) is found to be among the highest reported up to now. Improved photoactivity of the films is discussed as resulting from the closer proximity between the organic molecules and the surface of the TiO2 crystallites as well as the improved diffusion rate of water and oxygen through the interconnected pore network.

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Section: Resultsmentioning

confidence: 99%

Transparent Mesoporous Nanocomposite Films for Self‐Cleaning Applications

Allain

Besson

Durand

et al. 2007

Adv Funct Materials

113

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“…Anodic porous alumina (AAO) [50,[126][127][128][129]135], nanoporous silica [136][137][138][139][140][141], and mesoporous honeycomb-shaped activated carbon [142] were well-known nano-scale honeycombs. To maintain microstructural integrity in practical applications, characterizing their mechanical properties was of great importance.…”

Section: Mechanics Of Micro-and Nano-honeycombsmentioning

confidence: 99%

Bioinspired engineering of honeycomb structure – Using nature to inspire human innovation

Zhang

Yang

et al. 2015

Progress in Materials Science

579

328

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“…Successful surfactant removal is crucial in upholding the mechanical properties of the film. Chemin et al [25] applied different template removal processing to mesoporous silica thin films and concluded that the silica structure evolved differently, and that these differences affected film hardness and elastic modulus. Additionally, Wahab and He [26] suggested that trapped surfactant molecules inside the pore channels of periodic mesoporous organosilica films reduces their hardness.…”

Section: Introductionmentioning

confidence: 99%