Facile strategy for the fabrication of noble metal/ZnS composites with enhanced photocatalytic activities

Abstract

The introduction of noble metal nanoparticles to photocatalysts can effectively improve the separation efficiency of the photogenerated electron–holes.

Electronic Interactions and Charge-Transfer Dynamics for a Series of Yolk–Shell Nanocrystals: Implications for Photocatalysis

“…Importantly, Au@ZnS also exhibited a significant binding energy shift in Au 4d (∼0.2 eV) and S 2p (∼0.2 eV) relative to the Au colloids and pure ZnS. This feature again suggested the pronounced electronic interactions between Au and ZnS for Au@ZnS . For Au@Ni 3 S 4 , the recorded XPS spectra of Au 4f, Ni 2p, and S 2p in Figure b showed doublet features consistent with the chemical states of metallic Au and Ni 3 S 4 .…”

“…This feature again suggested the pronounced electronic interactions between Au and ZnS for Au@ZnS. 43 For Au@Ni 3 S 4 , the recorded XPS spectra of Au 4f, Ni 2p, and S 2p in Figure 7b showed doublet features consistent with the chemical states of metallic Au and Ni 3 S 4 . Particular attention should be directed to the multiple, overlapping peak features observed in the Ni 2p and S 2p spectra.…”

Construction of core–shell MOF@COF hybrids with a Z-scheme heterojunction for efficient visible light photocatalysis

“…According to the equation of E VB,NHE = φ + E VB,XPS − 4.44 (φ = 4.2 eV, which represents the work function of the instrument), 47 we can calculate the VB potentials (E VB,NHE ) of NH 2 -UiO-66 and TpBD to be 2.40 and 1.58 eV, respectively. Based on the equation of E g = E VB − E CB , 48 the band gap energies of NH 2 -UiO-66 and TpBD-COF are determined to be 2.80 and 2.24 eV, respectively, which are approximate to the corresponding optical band gap obtained from Tauc plots (2.85 eV for NH 2 -UiO-66, 2.14 eV for TpBD-COF). Fig.…”

A Room Temperature High‐Performance Visible‐Light‐Assisted NO2 Gas Sensor Based on Ultrathin Zinc Oxysulfide

“…[18,19,29] It is worth noting that there are no additional peaks observed in the S 2p region, revealing that the original sulfide phase has been totally converted to an oxysulfide system. [18,29,41,[43][44][45][46][47] Figure 2c depicts the BE of O 1s spectrum, in which the dominated peak centered at ≈532.04 eV is attributed to the chemical bond between Zn atoms and O atoms, whereas the minor peak located at the higher BE of ≈533.86 eV is considered to be a trace of the absorbed oxygen species upon the material surface. [48,49] The bonding characteristics of the zinc oxysulfide are investigated using the Raman spectrum as shown in Figure 3a, in which the strong peaks found at the Raman shift of ≈330, ≈437, and ≈569 cm −1 can be ascribed to the Zn─O vibrational mode of 2E 2 , E 2 and E 1 (LO), respectively.…”