nano tio2 supported on sio2 (nano tio2@sio2) as a solid lewis acid, was described to be an effective and reusable catalyst for one-pot three-component reaction of benzil, aryl aldehydes and ammonium acetate for the synthesis 2-aryl-4,5-diphenyl-1h-imdazoles synthesis. to explore the high efficacy of the catalytic system the four-component cyclization of benzil, aryl aldehydes, ammonium acetate ...

asphalt modification/reinforcement has received considerable attention as viable solutions to enhance flexible pavement performance. this is mainly prompted by the unsatisfactory performance of traditional road materials exposed to dramatic increases and changes in traffic patterns. this paper presents the evaluation of fatigue behaviour of nano reinforced stone mastic asphalt mixtures. fatigue...

A series of photocatalysts consisting C- and N-doped titanium dioxide (TiO2) nanoparticles highly dispersed firmly embedded at the surface a silica matrix were prepared using novel synthesis method in which activated carbon has double role: it acts as support for depositing TiO2 hard template generating that embeds them. Additionally, use combination with ammonia during led to nitrogen doping d...

B2O–SiO2 borosilicate glasses in a specific composition range show spinodal-type phase separation by heat-treatment at around those glass transition temperatures, and porous or glass-ceramics can be easily obtained via an acid treatment after the separation. We have studied preparation conditions of SrTiO3-precipitated for photocatalyst hydrogen generation using solar energy. It was found that ...

We theoretically demonstrate high quality factor (Q approximately 3x10(6)) micropillar cavities with a record low mode volume [V approximately 0.1(lambda/n)3] based on the TiO2/SiO2 material system. The proposed cavities have Q/V that is 3 orders of magnitude larger than previously reported ones. We show that our cavity embedded with a diamond nanocrystal provides a feasible platform for cavity...

A unique boronate-functionalized SiO2/TiO2 hybrid monolithic column was synthesized by a facile approach. Although a conventional boronic acid, 4-vinylphenylboronic acid, was used as the affinity ligand, the prepared monolithic column exhibited specific capacity to capture glycoproteins including antibodies in aqueous solution at neutral pH. With the incorporation of titania, the monolith was h...

TiO2/SiO2 nanocomposite with molar ratio 1:1 was synthesized by a free calcination sol-gel method using titanium tetra chloride and tetraethylorthosilicate as raw materials. In the composite, TiO2 nanocrystals are highly dispersed in the amorphous SiO2 matrix and the mater showed size quantization effect arising from the presence of extremely small titanium oxide species having a low coordinati...

Nano TiO2 supported on SiO2 (Nano TiO2@SiO2) as a solid Lewis acid, was described to be an effective and reusable catalyst for one-pot three-component reaction of benzil, aryl aldehydes and ammonium acetate for the synthesis 2-aryl-4,5-diphenyl-1H-imdazoles synthesis. To explore the high efficacy of the catalytic system the four-component cyclization of benzil, aryl aldehydes, ammonium acetate ...