CTAB-assisted synthesis of 3D Sn doped ZnO nanostructures with enhanced acetone sensing performance

Modulation of Sn concentration in ZnO nanorod array: intensification on the conductivity and humidity sensing properties

“…As a consequence of this electron trapping, the concentration of free carriers in the film reduced. Zhang et al [73] mentioned that the introduction of Sn 4+ ions into ZnO, which produces two free electrons in the process, increasing the density of adsorbed oxygen molecules on the ZnO surface. At the regions in which the water molecules are adsorbed the reaction happened is as followed:…”

Fabrication of Surfactant-Enhanced Metal Oxides Catalyst for Catalytic Ozonation Ammonia in Water

“…Recently, introduction of surfactants in the preparation of metal oxides has attracted much attention as a feasible and valuable method to control the surface properties of material, such as morphological structure, specific surface area, and particle size to improve the chemical reactivity. Leonardo et al [ 17 ] reported that a flower-like CeO 2 catalyst prepared with ethylene glycol using the co-precipitation method, exhibiting the best synergistic preferential oxidation activity, while Wu et al [ 18 ] prepared CeO 2 micron flowers using polyethylene glycol instead of ethylene glycol, which has a larger specific surface area and shows a kind of good activity to catalytic oxidation of CO. Additionally, the material obtained by this method can also be used as a gas sensor material [ 19 ] and applied to purify wastewater by decomposing organic compounds in water [ 20 , 21 ]. However, there are no similar and corresponding reports on the catalysts prepared by the combination of metal oxides and surfactant to enhance the interaction between catalyst and ozone for the catalytic ozonation of NH 4 + in water.…”