Chemically modified polyurethane-SiO2/TiO2 hybrid composite film and its reusability for photocatalytic degradation of Acid Black 1 (AB 1) under UV light

Facile synthesis of heterostructured Ag-deposited SiO 2 @TiO 2 composite spheres with enhanced catalytic activity towards the photodegradation of AB 1 dye

“…They had rough surfaces compared to the SiO 2 spheres because of the amount of TiO 2 nanoparticles deposited on the SiO 2 spheres which was only four atomic percent as confirmed by EDS [31]. The TiO 2 nanoparticles coating the SiO 2 spheres produced the advantage of increasing the active surface area, which helped to improve the photocatalytic activity.…”

“…The SiO 2 spheres and SiO 2 @TiO 2 composite spheres were synthesized using the same procedure as our previous study [31]. The synthesis process is as follows: 2 mL TEOS, 0.6 mL dodecane, 10 mL anhydrous ethanol, 2 mL water, 0.4 mL ammonia solution, and 6 mL anhydrous ethanol were added in sequence to form a mixture that was stirred for 2 h at room temperature.…”

“…3 shows FE-SEM images of (a) 1 wt% Ag-SiO 2 @TiO 2 , (b) 2 wt% Ag-SiO 2 @TiO 2 , and (c) 3 wt% Ag-SiO 2 @TiO 2 composite spheres and the (d) EDX spectrum of the 3 wt% Ag-SiO 2 @TiO 2 spheres. The sizes of the SiO 2 spheres and SiO 2 @TiO 2 composite spheres are 310 and 320 nm, respectively [31]. A very thin layer of TiO 2 nanoparticles was deposited on the surface of the SiO 2 spheres.…”

The advanced removal of benzene from aerosols by photocatalytic oxidation and adsorption of Cu–TiO 2 /PU under visible light irradiation

“…6F). Table 1 shows that the BET surface area of the synthesized TiO 2 /PU (110.4 m 2 /g) was not only greatly higher than that of the PU (30.46 m 2 /g) but also much higher than the surface area of commercial TiO 2 powder (60 m 2 /g) [23,47]. This result indicates that the immobilization of TiO 2 onto surface of honeycomb-structure PU greatly increased the surface area of TiO 2 .…”

Porous membrane based on chitosan–SiO2 for coin cell proton battery

“…However, during casting of the membranes, the crystalline peaks of the chitosan powder changed to an amorphous structure for the CA membrane. The broad SiO 2 peak was also observed at 2θ ¼ 221, which is commonly observed for SiO 2 [25][26][27].…”