A comparative study of the effects of CuO, NiO, ZrO2 and CeO2 coupling on the photocatalytic activity and characteristics of ZnO

Effects of post‐deposition annealing of cerium oxide passivation layer in nitrogen‐oxygen‐nitrogen ambient

“…Besides these beneficial effects of nitrogen ambient, the inbound of nitrogen species during annealing might contribute to the displacement of oxygen from the CeO 2 lattice, and hence encouraging the formation of oxygen vacancies unfavorable for passivation layer. 39,40 Despite the fact that both oxygen and nitrogen ambient have assisted in improving the passivating properties of CeO 2 layer, this research work intends to innovate by taking advantage on both ambient for post-deposition annealing of the CeO 2 passivation layer deposited on Si substrate via spin-on coating technique at different temperatures of 400 C, 600 C, 800 C, and 1000 C. The present study reported on the structural, morphological, optical, as well as MOS characteristics of the investigated CeO 2 passivation layer annealed in nitrogen-oxygennitrogen ambient.…”

“…Similar findings have been revealed for HfO 2 37 as well as stacking CeO 2 /La 2 O 3 38 passivation layer subjected to nitridation, wherein an enhancement in carrier mobility as well as stable threshold voltage were established for the fabricated devices. Besides these beneficial effects of nitrogen ambient, the inbound of nitrogen species during annealing might contribute to the displacement of oxygen from the CeO 2 lattice, and hence encouraging the formation of oxygen vacancies unfavorable for passivation layer 39,40 …”

Phthalhydrazide nanoparticles as new highly reusable organic photocatalyst in the photodegradation of organic and inorganic contaminants

“…With increasing catalyst dose from 0.025 to 0.12 g l −1 , the dye degradation was enhanced and the highest degradation of 96% was obtained at a catalyst dose of 0.05 g l −1 (Figure ). However, further increase in the catalyst dose showed no prominent increase in the degradation percentage, which could be attributed to the saturation of binding sites …”

“…However, further increase in the catalyst dose showed no prominent increase in the degradation percentage, which could be attributed to the saturation of binding sites. [25]…”

Synthesis and comparative study of the structural and optical properties of binary ZnO-based composites for environmental applications

“…A. E. Ramírez et al 32 are synthesized mixed photocatalysts from transition metal oxides (TMOs), such as Cr 2 O 3 , MnO 2 , FeO, CoO, NiO, Cu 2 O, CuO, and ZnO by the sol–gel method. E. D. Sherly et al 33 are successfully synthesized some coupled oxides, ZnO–MO (MO = CuO, NiO, ZrO 2 and CeO 2 ) using a microwave assisted one pot solution combustion synthesis, which favored the separation of photogenerated carriers. Unlike physical or chemical vaporization methods, hydrothermal synthesis is a simple, cost-effective, and environmentally friendly synthesis route, which is also suitable for mass preparation in industrial production, including synthesis by low-temperature hydrothermal reactions.…”