Facet Engineered Interface Design of Plasmonic Metal and Cocatalyst on BiOCl Nanoplates for Enhanced Visible Photocatalytic Oxygen Evolution

Abstract

Integration of plasmonic metal and cocatalyst with semiconductor is a promising approach to simultaneously optimize the generation, transfer, and consumption of photoinduced charge carriers for high-performance photocatalysis. The photocatalytic activities of the designed hybrid structures are greatly determined by the efficiencies of charge transfer across the interfaces between different components. In this paper, interface design of Ag-BiOCl-PdO hybrid photocatalysts is demonstrated based on the choice of suitable BiOCl facets in depositing plasmonic Ag and PdO cocatalyst, respectively. It is found that the selective deposition of Ag and PdO on BiOCl(110) planes realizes the superior photocatalytic activity in O evolution compared with the samples with other Ag and PdO deposition locations. The reason was the superior hole transfer abilities of Ag-(110)BiOCl and BiOCl(110)-PdO interfaces in comparison with those of Ag-(001)BiOCl and BiOCl(001)-PdO interfaces. Two effects are proposed to contribute to this enhancement: (1) stronger electronic coupling at the BiOCl(110)-based interfaces resulted from the thinner contact barrier layer and (2) the shortest average hole diffuse distance realized by Ag and PdO on BiOCl(110) planes. This work represents a step toward the interface design of high-performance photocatalyst through facet engineering.

The synthesis of a BiOClxBr1−x nanostructure photocatalyst with high surface area for the enhanced visible-light photocatalytic reduction of Cr(vi)

“…Therefore, the results of the photocurrent responses and PL studies demonstrate that the heterostructure between BiOCl and BiOBr can effectively suppress the recombination of the photogenerated electrons and holes, and thus enhance the corresponding photocatalytic reduction of aqueous Cr(VI). 19,36,37 The recombination and separation of the photogenerated electrons and holes could be further investigated by timeresolved transient PL (TRPL), as shown in Fig. 4b.…”

Bi2WO6–BiOCl heterostructure with enhanced photocatalytic activity for efficient degradation of oxytetracycline

“…However, there are still some bottlenecks hindering its practical application, such as wide band gap and fast recombination of electron–hole pairs of single BiOCl 7 . Some efforts have been devoted to deal with those drawbacks, such as controlling exposed crystal facets 8 , varying morphology and size 9 , 10 , noble metal doping 11 , 12 , and constructing heterostructures 13 – 15 , etc. Among these methods, the fabrication of heterostructure is one of the most effective ways.…”

Bi5+, Bi(3−x)+, and Oxygen Vacancy Induced BiOClxI1−x Solid Solution toward Promoting Visible‐Light Driven Photocatalytic Activity

“…c) Deposition of noble metals; [21][22][23] Noble metal nanoparticlesl oaded onto the surface of the photocatalyst can cause as urface plasmon resonance (SPR) property and stronga bsorption of visible light, improving the interface charget ransfer to effectively enhance the photocatalytic activity. [23,24] d) Facet-controlled fabrication; [25][26][27] It has been demonstrated that exposed {0 01}f acets could enhance the thermodynamic stabilitya nd photogenerated electron-hole pairs separation efficiency of BiOCl. [26] f) Solid solution of BiOCl x Br 1Àx , [28][29][30][31] BiOBr x I 1Àx , [32,33] andB iOCl x I 1Àx .…”

“…b) Ion doping; Ion doping is considered to be a promising strategy to improve the photocatalytic performance, which increases the transport of charge carriers by narrowing the band gap or forming an intermediate impurity level between the conduction band and the valence band. c) Deposition of noble metals; Noble metal nanoparticles loaded onto the surface of the photocatalyst can cause a surface plasmon resonance (SPR) property and strong absorption of visible light, improving the interface charge transfer to effectively enhance the photocatalytic activity . d) Facet‐controlled fabrication; It has been demonstrated that exposed {0 0 1} facets could enhance the thermodynamic stability and photogenerated electron‐hole pairs separation efficiency of BiOCl .…”