Construction of CoS/CeO₂ heterostructure nanocages with enhanced photocatalytic performance under visible light

Abstract

Exploring non‐noble metal photocatalysts with high activity and stability is always fascinating. Herein, the hollow CoS nanocages deriven from ZIF‐67 have been reported for the first time to combine with CeO2 NPs grown in situ for photocatalytic degradation of stubborn pollutants. The unique CoS nanocages not only provide rich active sites but also enhance light capture. CeO2 NPs loaded on the surface accelerate the separation of photocharges and extend the lifetime of photogenerated carriers. The optimized photocatalysts show outstanding activity and stability for the photodegradation of tetracycline and phenol under visible light, and the corresponding photodegradation efficiency is 96.5% and 90.5% at 60 minutes. The novel multi‐stage nanocage structure simultaneously realizes extended light absorption and improved photocharges transfer efficiency. This work provides an exclusive perspective to design high‐efficiency photocatalysts with hollow structures for environmental restoration.

Construction of NiPx/MoS2/NiS/CdS composite to promote photocatalytic H2 production from glucose solution

“…To overcome the deficiency of CdS, many methods are applied to improve the utilization of photogenerated charge carriers 14–17 . Structure designing and composition modification as the main strategies have been widely studied, including morphological control, heterostructure construction, and cocatalyst deposition 18–21 . 1D CdS‐nanostructures are usually selected as the research prototype because of the fast and long‐distance electron transfer, which facilitate the electron‐directed conduction 22 .…”

“…[14][15][16][17] Structure designing and composition modification as the main strategies have been widely studied, including morphological control, heterostructure construction, and cocatalyst deposition. [18][19][20][21] 1D CdS-nanostructures are usually selected as the research prototype because of the fast and long-distance electron transfer, which facilitate the electron-directed conduction. 22 Meanwhile, heterostructure construction has been demonstrated to increase the photocatalytic activity by rapidly separating the electron-hole pairs.…”

Decorating Zn0.5Cd0.5S with C,N Co-Doped CoP: An Efficient Dual-Functional Photocatalyst for H2 Evolution and 2,5-Diformylfuran Oxidation

“…Moreover, the photocatalytic performance of Zn x Cd 1– x S was also restricted by the fast recombination of photogenerated charge carriers (PCCs, including e – and h + ). Decorating chalcogenides with a noble-metal-free cocatalyst is an effective strategy to improve this situation, like transition metal compounds. , Many noble-metal-free, low-cost, and content-rich Co-based materials is considered due to their high efficiencies and good stabilities, such as CoS, , CoP, − and Co­(OH) 2 . , Due to the position of the band gap, they have been widely used as cocatalysts for photocatalytic H 2 production. As partial Co-based materials have similar properties to zerovalent metals, they can efficiently transfer photogenerated e – while preventing the recombination of photoinduced e – and h + .…”

“…Decorating chalcogenides with a noble-metal-free cocatalyst is an effective strategy to improve this situation, like transition metal compounds. 19,20 Many noble-metal-free, low-cost, and content-rich Co-based materials is considered due to their high efficiencies and good stabilities, such as CoS, 21,22 CoP, 23−26 and Co(OH) 2 . 27,28 Due to the position of the band gap, they have been widely used as cocatalysts for photocatalytic H 2 production.…”

Crystal facet and surface defect engineered low dimensional CeO2(0D, 1D, 2D) based photocatalytic materials towards energy generation and pollution abatement

“…In the context to the environment cleanup process, various nanostructure CeO 2 and CeO 2 based materials have been reported for air purification and wastewater treatment by efficient photocatalytic degradation/ mineralization of different dyes (RhB, MB, acid orange, eosin yellow etc.) , antibiotics [275][276][277][278][279][280][281][282][283][284] and organic pollutants (phenol-based materials) [285][286][287][288][289], as summarized in table 3. Morphology alteration enhances the surface defects such as Ce 3+ state and oxygen vacancies, which increases the light absorption parameter with redshifted absorption edge and also retards the photogenerated electron-hole recombination rate.…”