Zinc ions modified InP quantum dots for enhanced photocatalytic hydrogen evolution from hydrogen sulfide

Inorganic ligands-mediated hole attraction and surface structural reorganization in InP/ZnS QD photocatalysts studied via ultrafast visible and midinfrared spectroscopies

“…Recent studies suggest that the surface chemistry engineering of various photocatalysts plays a role in controlling the photoinduced dynamics of electrons and holes. For example, surface ligands engineering can significantly modulate the charge carrier transfer in semiconductor colloidal quantum dots (QDs) [13][14][15][16][17][18][19]. Surface ligands of QDs usually anchor to the surface uncoordinated atoms and passivate the surface trap states, avoiding the random recombination of charge carriers and ensuring the sufficiently long excited-state lifetime to drive proton reduction [20][21][22].…”

Assembling an Affinal 0D CsPbBr3/2D CsPb2Br5 Architecture by Synchronously In Situ Growing CsPbBr3 QDs and CsPb2Br5 Nanosheets: Enhanced Activity and Reusability for Photocatalytic CO2 Reduction

“…Furthermore, perovskite quantum dots (PQDs) have been found to exhibit excellent efficiency for photocatalytic CO 2 reduction . Compared with conventional II–VI or III–V colloidal QDs (such as CdS, PbSe, and InP), PQDs present more intriguing and remarkable merits, such as more atom exposure, various defects, and a short carrier transport path from the inside to the surface of the material . Thus, the PQDs should be a competitive candidate for enhanced selective conversion of CO 2 .…”

“…29 Compared with conventional II−VI or III−V colloidal QDs (such as CdS, 30 PbSe, 31 and InP 32 ), PQDs present more intriguing and remarkable merits, such as more atom exposure, various defects, and a short carrier transport path from the inside to the surface of the material. 32 Thus, the PQDs should be a competitive candidate for enhanced selective conversion of CO 2 . However, many challenges should be overcome during the practical application of QDs, such as the decrease of the activity caused by the agglomeration of QDs.…”

Interface engineering of InP/ZnS core/shell quantum dots by the buffer monolayer for exceptional photocatalytic H2 evolution

“…[20][21][22] Similar to Cd-based QDs, CdS and/or CdSe QDs for example, the photocatalytic activity of InP QDs would be moderately enhanced by coating the passivation shell (such as ZnS) to eliminate the surface defects of InP QDs and improve their stability. [23][24][25][26][27] However, the lattice mismatch between ZnS and InP reaches 7.8%, which would cause the introduction of interfacial stress between them and result in the non-radiative recombination of excitons at the interface. 28,29 Besides, our previous work has also demonstrated that the excessive surface coverage of ZnS would block the interfacial charge transfer in the type-I core/shell QDs, 30 thus leading to declined photocatalytic performance.…”