Pulsed laser deposition of CoFe2O4/CoO hierarchical-type nanostructured heterojuction forming a Z-scheme for efficient spatial separation of photoinduced electron-hole pairs and highly active surface area

Review on cobalt ferrite as photo-Fenton catalysts for degradation of organic wastewater

“…50 In addition, morphology, grain size, cation distribution, and defects are the factors affecting the band gap value of CoFe 2 O 4 . According to reports, in the hierarchical urchin-like nanostructured CoFe 2 O 4 /CoO catalyst prepared by the PLD method, the conduction band (CB) and valence band (VB) of CoFe 2 O 4 are located at +0.16 and +1.44 eV, respectively, and the band gap value is 1.28 eV; 51 in the hydrothermally prepared CoFe 2 O 4 nanoparticle-decorated MoS 2 nanosheet composite catalyst, the band gap of CoFe 2 O 4 is enlarged to 1.33 eV; 52 in the CoFe 2 O 4 /Ag 3 PO 4 composite core–shell structure material prepared by the precipitation method, the band gap of CoFe 2 O 4 is 1.17 eV, which is close to that of pure CoFe 2 O 4 . 53 It can be seen from the above that the combination of CoFe 2 O 4 and other catalytic materials through different preparation methods has little effect on its band gap value.…”

“…12a). 51 The urchin-like composite oxide has good visible light responsiveness and a large specific surface area, which makes the catalyst fully in contact with organic molecules and improves the catalytic activity. Meanwhile, the band gap structure and surface properties between the two semiconductor materials allow the formation of Z-scheme heterojunctions, as shown in Fig.…”

Towards the Development of a Z-Scheme FeOx/g-C3N4 Thin Film and Perspectives for Ciprofloxacin Visible Light-Driven Photocatalytic Degradation

“…In this paper, we investigate the production of Z-scheme composite thin films based on the combination of pulsed laser deposition (PLD)-produced urchin-like iron oxide (FeOx) nanostructured film with g-C 3 N 4 to be employed for ciprofloxacin (CIP) degradation. The urchin-like FeOx was recently developed in our lab and has been selected as a platform for the composite synthesis because it has good solar spectrum compatibility, with an energy bandgap E g = 2.2 eV; consists of hierarchical structures, which are beneficial for applications requiring high surface area [40,41]; and finally, it is photo-Fenton active [42,43]. Two different strategies were used to prepare FeOx/g-C 3 N 4 composite films.…”

Morphological and Elemental Investigations on Co–Fe–B–O Thin Films Deposited by Pulsed Laser Deposition for Alkaline Water Oxidation: Charge Exchange Efficiency as the Prevailing Factor in Comparison with the Adsorption Process

“…3D hierarchical nanostructured coatings of Co 3 O 4 and iron oxides synthesized with boron by using boric acid as a source of boron in the initial target mixture, displayed excellent photocatalytic [38,39] performance. Similarly prepared CoFe 2 O 4 /CoO hierarchical-type nanostructured coating synthesized with boron exhibited excellent photocatalytic activity towards degradation of methylene blue dye [40]. Boron was also introduced in synthesis of mixed metal oxide/boride electrocatalysts towards OER displaying enhanced electrochemical performance [41,42].…”

“…The coatings were synthesized by PLD with targets comprising of a mixture of metallic Fe, Co and boric acid (H 3 BO 3 ). The synthesis protocol is adopted from our past work [40]. A systematic morphological and compositional characterization was carried out in order to investigate the role of number of active sites and the activity of each site on the electrochemical performance of the electrocatalyst.…”