The CdS/g-C3N4 nano-photocatalyst: Brief characterization and kinetic study of photodegradation and mineralization of methyl orange

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

“…The photocatalytic ability of semiconductors is related to the excitation of electrons from the valence band to the conduction band caused by the absorption of a photon with an appropriate wavelength. The photoexcited electrons and holes are good reductant and powerful oxidant species, respectively [6][7][8]. In this scenario, the application of semiconductor materials for environmental remediation in large scale will depend, among other factors, on its activation in an effective way by solar radiation.…”

Modulation of the Structure of the Conjugated Polymer TMP and the Effect of Its Structure on the Catalytic Performance of TMP–TiO2 under Visible Light: Catalyst Preparation, Performance and Mechanism

“…The photocatalytic activity of the synthesized catalysts was evaluated by degrading RhB, which is a typical organic pollutant presented in water, under visible light irradiation. The widely accepted Langmuir–Hinshelwood (L–H) kinetic model was used to describe the photocatalytic kinetics during the photodegradation of RhB in solution, which can be expressed by the following equation [ 52 , 53 ]: r = −dC/dt = kKC/(1 + KC) where r represents the reaction rate (mg/L min), k is the reaction rate constant, K is the Langmuir equilibrium adsorption constant of the reactant (L/mg), and C represents the concentration of pollutants in the solution (mg/L). Generally, when the concentration of pollutants in the solution is > 5 mM, the values of K >> 1.…”

In situ bridging nanotwinned all-solid-state Z-scheme g-C3N4/CdCO3/CdS heterojunction photocatalyst by metal oxide for H2 evolution

“…[22][23][24] Broad bands at 3000-3600 cm −1 correspond to OH/NH stretching vibrations. 25,26 Three bands in the CN/CC/CS spectrum at approximately 701, 1100, and 2350 cm −1 are attributed to the vibration modes of Cd-O in CC, 27 Cd-S in CS, 28 and CO 3 2− ions, respectively, as well as CO 2 on the surfaces of samples. 21,27 Notably, the undetected band at 810 cm −1 of the CN/CC/CS spectrum indicates a severe change in tri-s-triazine units in CN.…”