Sol?Gel Processed Functional Nanosized TiO2 and SiO2-Based Films for Photocatalysts and Other Applications

Bio-mimicking TiO2 architectures for enhanced photocatalytic activity under UV and visible light

“…Although a mixture of anatase and rutile phases has been commonly reported for the room-temperature sol-gel synthesis of TiO 2 followed by a heat treatment, the phase formation strongly depends on several factors, including the nature and volume of the solution, the reaction atmosphere and time, the presences of impurities, the morphology of the sample, and also the rate and thermal homogeneity of the post-synthesis heat treatment. [54][55][56] The XRD patterns in Fig. 3 show that the MNAL and MAL consist predominantly of the anatase crystalline phase, whereas the AChl is a combination of anatase and rutile TiO 2 phases.…”

Silver and gold nanoparticles in silica matrices: synthesis, properties, and application

“…The methods for the production of the nanoparticles of the individual metals and of the bimetallic nanoparticles are similar: photoreduction, chemical reduction in aqueous media in the presence of stabilizers (polymers, inverse micelles), thermal reduction [30,[74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90]. There is no doubt that the photochemical method for the reduction of nanoparticles and bimetallic nanoparticles from their ions is the most economical and energy-and time-saving in comparison with other methods [29][30][31]77].…”

“…The sol-gel procedure for the production of silica films was described in [81]. Briefly the synthesis consisted of the following.…”

Design and Photocatalytic Activity of Mesoporous TiO2/ZrO2 Thin Films

“…Hexane adsorption/desorption isotherms onto the TiO 2 /ZrO 2 mixed oxide films calcined for 2 h at 400°C (Smirnova et al 2004) are characteristic of type IV behaviour, which indicates the Energy, E (eV) Figure 1. UV-vis absorption spectra for TiO 2 , ZrO 2 and TiO 2 /ZrO 2 films.…”

“…Titanium dioxide is one of the most studied semiconductors due to its applicability for various photocatalytic reactions. Many organic substrates have been shown to be degraded oxidatively (and, in some cases, reductively) and ultimately mineralized completely at both the liquid-surface interface and the gas-surface interface under UV irradiation (Kornman et al 1991;Ma and Yao 1998;Zorn et al 1999;Smirnova et al 2004;Sopyan et al 1996).…”