Review on augmentation in photocatalytic activity of CoFe2O4 via heterojunction formation for photocatalysis of organic pollutants in water

A novel CoFe2O4@Cr-MIL-101/Y zeolite ternary nanocomposite as a magnetically separable sonocatalyst for efficient sonodegradation of organic dye contaminants from water

“…27) and in contrast, the potentials for CoFe 2 O 4 were calculated to be +1.9 eV and +0.14 eV (ref. 38), respectively. It is notable that the mentioned exited electrons situated at the conductions band (CB) of Cr-MIL-101 (À1.57 eV) 27 are capable to transfer straightly to the Fig.…”

“…Meeting the relevant wavelength of the emerged light with the Cr-MIL-101 and CoFe 2 O 4 makes them exited and also causes the sonogenerated electrons and the excited holes to be appeared. To calculate the absorption band energy (E g ) of the as-prepared catalysts according to the available literatures, 27,38 the following equation can be used (5): 50…”

“…CB of CoFe 2 O 4 (+0.14 eV). 38 In contrast, the above underlined sonogenerated holes which are existent at the valence band (VB) of CoFe 2 O 4 (+1.9 eV) 38 easily transfer to the VB of Cr-MIL-101 (+0.49 eV). 27 As a matter of fact, these perpetual migrations of the sonogenerated holes and electrons alleviate the probable aggregation and moreover enhance the charge segregation rate leading to substantially higher sonocatalytic efficiency.…”

“…[34][35][36] Elsewhere, in recent years, the inorganic spinel cobalt ferrite nanoparticles (CoFe 2 O 4 NPs) with band gap energy 1.76 eV have grabbed much attention referred to their different properties such as coercivity, anisotropy, saturation, magnetization, etc. 37,38 Thereupon, these salient and applicable features make magnetic CoFe 2 O 4 NPs suitable for several elds for instance drug delivery, 39 magnetic uid hyperthermia, 40 microwave devices, 41 permanent magnets, 42 catalysis, 43 etc. The incorporation of various sorts of magnetic NPs over the surface of solid catalysts provides a high surface area to enhance the efficiency of the catalytic processes.…”

Systematic review on applicability of magnetic iron oxides–integrated photocatalysts for degradation of organic pollutants in water

“…Photocatalysis process utilizes UV-visible light or solar energy for oxidative or reductive degradation of organic pollutants into inorganic ions, CO2 and H2O with no further harmful byproducts [15][16][17][18][19][20][21]. The first report by Fujishima and Honda embarked the generation of photocatalysis by experimentation on photo-electrochemical water splitting via aid of titanium dioxide (TiO2) driven by ultraviolet light.…”