Photoconductive and photocatalytic properties of CdO–NiO nanocomposite synthesized by a cost effective chemical method

CdO:Ag thin films with enhanced visible light photocatalytic activity against metanil yellow

“…The electronic transition of ionized oxygen vacancies from the deep level donor to the valence band is responsible for the emission peak at 525 nm [22]. The yellow emission peak related to defect levels associated with O vacancies or Cd interstitials is observed at 569 nm [23]. The donor-acceptor pair (DAP) peaks at 591 and 600 nm may be due to radiative transitions from the surface defect states [24].…”

Surface modification of Ag–CdO with polyaniline for the treatment of 3′,3″,5′,5″-tetrabromophenolsulfonphthalein (BPB) under UV-visible light irradiation

“…Aquatic ecosystems receive multiple types of organic and inorganic contaminants due to the aforementioned human activities. Organic dyes are among the common water pollutants which could be discharged from the textile, leather, paper, cosmetics, and printing industries [ 1 , 2 ]. Some of these contaminants are pharmaceuticals, personal care products, pesticides, disinfection by-products, and synthetic chemicals such as dyes [ 3 ].…”

“…It is highly attractive due to its great optical transparency in visible region, low electrical resistance, high charge carrier mobility, moderate optical bandgap, and refractive index. This semiconductor is convenient for a widespread range of applications, for instance, in solar cells, photodiodes, photoresistors, sensor technology, and photocatalyst [ 17 ], however, CdO NPs and similar oxides suffer from decreasing recombination times between the electron-hole pairs [ 2 ]. Such challenges could be avoided through a combination of various nanostructured semiconductors in order to produce a nanocomposite so that the mutual transfer of electrons-holes pairs from one to other semiconductor [ 2 ].…”

“…According to the study, CdO having a small bandgap was mixed with a wide bandgap NiO semiconductor and results in new bandgap formation due to the interaction of their conduction or valence band. In the combination of CdO with NiO, an electric field can be created at the interface that enhanced the migration of photoinduced charge carriers and photoinduced electron-hole pairs are efficiently separated to slowdown the recombination phenomena [ 2 ].…”

One‐step synthesis of a WO3‐CuS nanosheet heterojunction with enhanced photocatalytic performance for methylene blue degradation and Cr(VI) reduction

“…Solar power‐driven semiconductor photocatalysis has been regarded as a potential green strategy for environment purification and energy conversions. Since 1972, when the photoelectrochemical water‐splitting activity of titanium dioxide (TiO 2 ) was first reported, various types of semiconductor nanomaterials, including metal oxides such as ZnO and NiO, metal sulfides such as MoS 2 and PbS, and nitrides such as C 3 N 4 , have been broadly explored for applications in photocatalysis . Among them, nanostructural tungsten trioxide (WO 3 ) has attracted significant scientific interest due to its unique physical properties, strong photocorrosion stability in aqueous solution, harmlessness and low cost.…”