Fabricating sandwich-shelled ZnCdS/ZnO/ZnCdS dodecahedral cages with “one stone” as Z-scheme photocatalysts for highly efficient hydrogen production

Abstract

Novel sandwich-shelled ZnCdS/ZnO/ZnCdS dodecahedral cages are synthesized with “one stone”, exhibiting advanced performance towards photocatalytic hydrogen production.

NiS‐Decorated ZnO/ZnS Nanorod Heterostructures for Enhanced Photocatalytic Hydrogen Production: Insight into the Role of NiS

“…The full XPS spectrum of NiS/ZnOS–15, offered in Figure S10, Supporting Information, revealed the peaks of elements Zn, O, S, and Ni in NiS/ZnOS–15. Figure a shows the Zn 2p XPS spectra of ZnO and NiS/ZnOS–15, where two peaks at around 1022.19 and 1045.06 eV were observed, illustrating the normal oxidation state of Zn 2+ . The high‐resolution O 1s spectrum of ZnO (Figure b) presented two peaks at 530.2 and 531.7 eV that were assigned to the typical metaloxygen bond and the loosely bound oxygen (OH − ), respectively .…”

An Efficient and Stable MoS2/Zn0.5Cd0.5S Nanocatalyst for Photocatalytic Hydrogen Evolution

“…where E CB and E VB are the CB and VB edge potentials, respectively, X is the absolute electronegativity, [51] E c is the energy of free electrons on the hydrogen scale (4.5 eV), and E g the bandgap. [52] With the above equations, we determinedt he CB and VB positions of Zn x Cd 1Àx S( Ta ble S3 in the Supporting Information).A ni ncreased Zn content in Zn x Cd 1Àx Ss olid solution results in widened bandgaps and raised CB edges in comparison to pure CdS, which has low photocatalytic activity due to fast recombination of the photogenerated carriers. Zn 0.5 Cd 0.5 S showedo ptimized photocatalytic performanceb ecause it balances the light absorptionc apacity and CB edgep osition, which is beneficialt oe ffectively separate the photogenerated electrons and holes.A st he bandgapo fM oS 2 has been determined to be 1.8 eV, [47] the CB edge and VB edge of MoS 2 are À0.08 and 1.72 eV at the zero point, respectively,w hich indicates that the CB edge potential is more positivet han that of Zn 0.5 Cd 0.5 S. Under visible light, both Zn 0.5 Cd 0.5 Sa nd MoS 2 could be exciteda nd generate electrons and holes.…”

Hollow Structured Metal Sulfides for Photocatalytic Hydrogen Generation

“…MOF‐derived method shares both the properties of the hard template and the self‐template method. This method requires pre‐prepared MOF as a hard template and etching process, but MOF also plays a role as self‐template, and the Kirkendall effect is observed during the second treatment . Therefore, the products of this method have similar morphology and size of MOF.…”

“…As a result, partial reaction with additional reactants, partial and selective etching of MOF template, and series of partial reaction and selective etching are available. Through these processes, complex hollow structure metal sulfides such as multi‐shell, yolk‐shell, and sandwich shell have been widely studied …”