Hybrid magnetic core–shell TiO2@CoFe3O4 composite towards visible light-driven photodegradation of Methylene blue dye and the heavy metal adsorption: isotherm and kinetic study

The mechanism of water pollutant photodegradation by mixed and core–shell WO3/TiO2nanocomposites

“…The adsorption performances of the pure oxides and composite materials were evaluated by the Langmuir isotherm adsorption models. 63–65 The Langmuir adsorption isotherms of the dyes are depicted in eqn (6) below:where q e is the equilibrium adsorption capacity (mg g −1 ) at a specific dye concentration, q m is the adsorption maximum capacity of adsorbents (mg g −1 ) when the concentration of dye is sufficiently high, K L is the Langmuir adsorption constant (L mol −1 ), and C e is the equilibrium free dye concentration (mg L −1 ). The experimental values of q m and K L were fitted with the nonlinear fitted Langmuir isotherm adsorption curves.…”

“…The reaction rates were analyzed as pseudo first-order reactions using eqn (4) and the Langmuir–Hinshelwood model. 65 The rate constant for each nanocomposite and dye is summarized in Table 3 .…”

“…The adsorption performances of the pure oxides and composite materials were evaluated by the Langmuir isotherm adsorption models. [63][64][65] The Langmuir adsorption isotherms of the dyes are depicted in eqn ( 6) below:…”

Visible-light photocatalytic degradation of dyes by TiO2–Au inverse opal films synthesized by Atomic Layer Deposition

“…Most of them are poorly biodegradable or resistant to environmental conditions [2]. This is why important research efforts are currently being made on photocatalysis and adsorption methods to degrade or eliminate these products [3][4][5][6][7][8].…”

“…Different methods have been proposed to improve the photo-electronic properties of TiO 2 in order to overcome these drawbacks and enhance the activity of TiO 2 -based photocatalysts. Nanostructured titanium dioxide and nanocomposites coupling TiO 2 with different types of materials (graphene, carbon nanotubes, quantum dots, ...) have been widely developed and tested as photocatalysts for wastewater treatment [8,[16][17][18][19][20].…”