Optimization and an insightful properties—Activity study of electrospun TiO2/CuO composite nanofibers for efficient photocatalytic H2 generation

Sol–gel synthesis of visible-light-driven Ni(1−x)Cu(x)Fe2O4 photocatalysts for degradation of tetracycline

“…5(b)-(d) Fig. 4(d), the obvious characteristic shakeup satellite peaks around 942.0 eV and 962.0 eV, which confirmed the existence of Cu 2 þ in the sample [31]. In additional, no other O 1s level shows that there is no impurity [32].…”

Fabrication of wheat grain textured TiO2/CuO composite nanofibers for enhanced solar H2 generation and degradation performance

“…Titanium dioxide (TiO 2 ) is a most common photocatalyst candidate applied in H 2 production and degradation of organic pollutants in water because of its stability against photocorrosion, low-cost, and suitable bandgap with appropriate conduction band and valence band alignments [7,8]. However, the wide band gap which leads to its poor light absorption and rapid recombination of electron-hole pairs resulting in low photocatalytic activity has greatly restrict the efficiency of TiO 2 for practical applications [9,10]. Thus, considerable efforts have been made to improve TiO 2 light harvesting and facilitate the electron-hole pair separation [11][12], which involve, for instance, doping with noble metals [13][14], combining with semiconductor quantum dots (QDs) [15,16] and carbon dots (CDs) [9,17], or sensitizing with organic dyes [18].…”

Heterojunctions in Composite Photocatalysts

“…Sol-gel solutions of precursor mixtures can also be used to prepare nanostructured multicomponent heterojunctions, as was shown for TiO 2 -CuO composite nanofibers via electrospinning [27]. The Cu content had a strong influence on the fiber surface area, and fibers containing 6 mol% Cu and calcined at 450 C exhibited the highest surface area with 156 m 2 /g and thus the highest activity for photocatalytic hydrogen generation (400-W high pressure Hg lamp, 10 vol.% methanol/water mixture, amounts not given).…”