TiO 2 /SnO 2 nanotubes for hydrogen generation by photoelectrochemical water splitting

Fast preparation of Cu(In,Ga)Se2 and CuIn(S,Se)2 bulk materials by combustion synthesis

“…In the application of solar energy, materials, by which solar energy is converted into heat, electricity, and chemical energy, play a key role to promote the efficiency and reduce the cost of solar energy devices. For example, several photoactive heterostructures have been developed to improve the performance of photoelectrochemical cells …”

Nanostructured TiO2-based gas sensors with enhanced sensitivity to reducing gases

“…According to the side-view image (Fig. 3) and the previous analysis [27–28 39–40], the cross-section of flower-like TiO 2 nanostructures reveals a compact layer, sponge-like form, and nanoflowers on top of the structure. The flower-like objects are also well visible on the top-views (Fig.…”

“…Secondly, the well thought out, design engineering of the TiO 2 microstructure allows for switching from the H 2 highly sensitive layered sensor to the CO(CH 3 ) 2 extremely sensitive flower-like sensor. According to our previous experience in the field of photo-electrochemical properties, the creation of a SnO 2 –TiO 2 heterojunction, whether in the form of SnO 2 nanoparticles deposited on the flower-like TiO 2 nanostructures, nanotubes composed of a SnO 2 –TiO 2 solid solution, or TiO 2 accompanied by phases from the Sn–O, significantly improves their properties [27]. A similar effect is observed when the same nanostructures are applied as gas sensors.…”

“…The air flow was controlled by a gas flow system equipped with MKS flow meters and kept at level of 80 sccm. (B) NS0 – flower-like 3D nanostructures were prepared according to the previous reports [27–28] by chemical oxidation at moderate temperature. Typically, after degreasing, the Ti foils were etched in concentrated HCl for 2 min, washed in distilled water and dried in Ar atmosphere at 100 °C.…”

“…For the past few decades, the TiO 2 /SnO 2 coupled system has been a subject of intensive research [18,27,33]. This synergetic system modifies the electronic structure by improving electron migration from titanium dioxide to tin dioxide and promotes oxygen molecule adsorption at the surface [34].…”