NiO/C₃N₄: hybrid photocatalyst for the enhanced photodegradation of organic pollutant under visible light

The synergistic degradation of pollutants in water by photocatalysis and PMS activation

“…Since the emergence of photocatalytic technology, scholars have made significant advancements in the development of various semiconductor photocatalytic materials including zinc oxide (ZnO) (Kaur et al, 2020; Wang, Feng, & Wei, 2023), titanium dioxide (TiO 2 ) (Sun et al, 2011; Yadav et al, 2022; Zhang et al, 2004), bismuth oxyhalide (BiOX) (Ye et al, 2014; Zhang et al, 2020; Zhao et al, 2022), bismuth‐rich halogen oxides (Bi x O y X z ) (Jin et al, 2017; Liu et al, 2015; Sun et al, 2022; Ul Hassan et al, 2022), graphitic carbon nitride (g‐C 3 N 4 ) (Aliabadi et al, 2021; Thiyagarajan et al, 2018; Yadav et al, 2022), and selenium dioxide (SeO 2 ) (Nenavathu et al, 2013; Rajamanickam et al, 2015). However, these semiconductor photocatalysts commonly exhibit characteristics such as a narrow light absorption range, wide band gap, and high electron–hole recombination efficiency.…”

Local Surface Plasmonic Resonance, Surface-Enhanced Raman Scattering, Photoluminescence, and Photocatalytic Activity of Hydrothermal Titanate Nanotubes Coated with Ag Nanoparticles

“…Hence, by the DRS measurement, TNT/Ag showed that Ag NPs induced an LSPR effect in which the visible light absorption capacity of the sample significantly increased, which could be assigned to the enhanced photocatalytic activity. Both enhanced light harvesting and bandgap reduction in the composite sample were beneficial to photocatalytic improvement [40][41][42][43]. Another important factor for enhanced photocatalytic activity was the radiative combination rate that brought about information of the photoinduced carriers' lifetimes, which were usually characterized by the photoluminescence (PL) emission intensity.…”

“…Another important factor for enhanced photocatalytic activity was the radiative combination rate that brought about information of the photoinduced carriers' lifetimes, which were usually characterized by the photoluminescence (PL) emission intensity. Figure 6(a) shows normalized PL emission intensities of synthesized samples, which indicated that the radiative recombination rate of photoinduced electron-hole pairs was possibly reduced in the TNT/Ag composite [40,44,45]. Typically, PL signals that appeared at 427 nm (2.90 eV), 585 nm (2.12 eV), and 647 nm (1.92 eV) were assigned to radiative recombinations of bandband excitons, conduction band electron-singly ionized oxygen vacancy (V + O ), and electron trap-valence band hole, respectively [44,46].…”

Titanate Tubular Loaded Diatom Fabricated by a Facial Hydrothermal Method for Photocatalytic Enhancement under Visible Light Irradiation

“…4a shows the UV-vis diffuse absorption spectra of TNT and D/TNT composite. There are several techniques to derive bandstructure of the semiconductor through this measurement [21][22][23]. One of the simple and useful methods is Tau's plot with Kubelka-Munk (KM) function.…”