Facile fabrication of a CoO/g-C₃N₄p–n heterojunction with enhanced photocatalytic activity and stability for tetracycline degradation under visible light

Abstract

The CoO/g-C3N4 p–n heterojunction photocatalysts exhibit enhanced photocatalytic activity and stability under visible light.

Laser Induced Anchoring of Nickel Oxide Nanoparticles on Polymeric Graphitic Carbon Nitride Sheets Using Pulsed Laser Ablation for Efficient Water Splitting under Visible Light

“…In spite of the visible-light activity of g-CN close to the blue spectral region, the use of pure g-CN is restricted by rapid photo-generated charge recombination, small surface area, due to the characteristics two-dimensional layered structure [ 22 , 23 ]. In order to minimize the rapid charge recombination and harness the positive features of g-CN, modifications like doping with metal and non-metals and compositing with other co-catalyst have been tried, and these kinds of material engineering have improved the photocatalytic activity of the material to a certain extent, in different applications [ 24 , 25 , 26 ]. Particularly, compositing n-type g-CN with different p-type semiconducting materials like BiOCl, CuS, and SnS 2 has been tried, and it was reported that the resultant p-n heterojunction facilitated the spatial charge separation and consequently resulted in the reduction of charge recombination, which was eventually manifested as the enhancement of photocatalytic efficiency.…”

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

“…Other g-C 3 N 4 nanocomposites were investigated with a range of materials and morphologies [39,82,91,, to access different charge transfer mechanisms between g-C 3 N 4 and the other components. These include a g-C 3 N 4 -based type II heterojunction [103], g-C 3 N 4 -based p-n heterojunction [91,129], g-C 3 N 4 -based Z-scheme heterojunction [113,130], g-C 3 N 4 /metal heterojunction [100,102], and a g-C 3 N 4 /carbon heterojunction [131]. The design of g-C 3 N 4 heterojunction photocatalysts is an attractive strategy to tune the electronic structure and redox potentials for visible-light absorption photocatalytic H 2 generation.…”

Stable CuCrO2 nanoparticles - ZnO fibres p-n heterostructure system for effective photocatalytic activity

“…As a result, the p-n heterojunction leads to the formation of positively and negatively charged regions in n-ZnO and p-CuCrO 2 , respectively. This internal electric field improves the separation of photo-generated charge carriers [66]. Under the light irradiation, photo-excited holes in valance band of ZnO can now migrate to valence band of CuCrO 2 .…”