Zn defect-mediated Z-scheme electron-hole separation in AgIn5S8/ZnS heterojunction for enhanced visible-light photocatalytic hydrogen evolution

Synergistic Effect of the Surface Vacancy Defects for Promoting Photocatalytic Stability and Activity of ZnS Nanoparticles

“…XRD patterns indicate that the prepared ZnS presents sphalerite phase (Figure S2), and the sample without washing contains sharp characteristic diffraction peaks of NaNO 3 , indicating they are coprecipitated during the synthesis process. The high-resolution transmission electron microscope (HRTEM) images of M 3 –ZnS are shown in Figure S3; few complete crystal lattices and most discontinuous lattices or disordered arrangements can be found, indicating abundant defects in the prepared M 3 –ZnS. , The truncated lattices (Figure S3a) and steplike lattices (Figure S3b) can be obviously observed in magnified HRTEM images of M 3 –ZnS, but almost none in HRTEM images of W–ZnS (the ZnS prepared with water as solvent, Figure S4). It further confirms that ZnS and NaNO 3 are randomly embedded in heterogeneous nucleation mode to form coprecipitation.…”

Facile synthesis of compact CdS–CuS heterostructures for optimal CO2-to-syngas photoconversion

“…It is known that n-type semiconductors with conduction band potentials ( E CB ) can be ca. 0.1 V more negative than the E FB , 57 thus the E CB of CdS and CuS was determined to be ca. −1.0 and ca.…”

Unique NiCo2S4@ZnS/CdS Yolk–Shell Heterojunction for Efficient Visible-Light-Driven Photocatalytic Water Splitting

“…The abovementioned binding energy variations signify that the electron cloud densities of Ni and Co elements in NCS were decreased after it was hybridized by ZS/CS, whereas the electron cloud densities of Zn and Cd elements in ZS/CS were increased when it was coupled with NCS to form the NCS@ 60ZS/CS composite, which evidences clearly that the electrons were transferred from ZS/CS to NCS after they were combined together, thus confirming the formation of an intimate heterojunction between NCS and ZS/CS. 46,47 In addition, the S 2p spectra of NCS and NCS@60ZS/CS are displayed in Figure S2, both of which can be fitted into two sets of doublet peaks around 161.0−162.1 and 162.4−163.2 eV, which could be attributed to the S 2− and S 2 2− ligands, respectively. 48,49 Previous studies have clarified that S 2 2− ions are the catalytically active sites for H 2 formation.…”