A multifunctional material based on tin dioxide (SnO2) doped with molybdenum and niobium was synthesized using underwater plasma as a doping method. The obtained materials were characterized using X-ray diffraction, scanning electron microscopy, UV spectroscopy, and thermogravimetric analysis. The photocatalytic, gas-sensing, and dielectric properties of the samples were investigated. Plasma treatment leads not only to doping of tin oxide but also to modification of its surface, which significantly enhances the photocatalytic and gas-sensing properties of SnO2 and facilitates the development of materials for k-capacitors.
