Zinc vacancy-promoted photocatalytic activity and photostability of ZnS for efficient visible-light-driven hydrogen evolution

Surface Reorganization on Electrochemically‐Induced Zn–Ni–Co Spinel Oxides for Enhanced Oxygen Electrocatalysis

“…However,there is as hift in the Co 2p spectrum of cycled ZNCO/NCNTs compared with that of the original state,p roving an ew interaction between the Co and other species.The inclusion of new exchange mode into the system was accompanied by adecrease in the shifted Co 2p 3/2 peak maxima from 781.5 to 780.7 eV.Owing to the appearance of new Co-based reaction centers,t he electron delocalization around the Co atom can be effectively adjusted. [19] Thes tructural characterization analysis was obtained by aberration-corrected transmission electron microscopy (AC-TEM). Surface oxides of cycled ZNCO/NCNTs still maintain ad ispersed particle state.T he HRTEM images (Supporting Information, Figure S8a-d) show areas of lattice disorder and crystallization.…”

Defect‐Type‐Dependent Near‐Infrared‐Driven Photocatalytic Bacterial Inactivation by Defective Bi2S3 nanorods

“…By comparison of the XRD patterns and SEM images of BS-1, BS-3, and BS-5, it can be discerned that the different durations of solvothermal treatment did not change the morphology or the crystal phase of Bi 2 S 3 .H owever,f rom the obtainedE SR spectra (Figure 2), BS-1, BS-3, and BS-5 samples show different intensities of ESR signals (g % 1.994) regardless of the absence or presenceo fN IR irradiation. [1,4,20,21] Based on this, it would be suitable to explore Bi/S ratios obtainedf rom XPS to evaluate the effects of surface defects. As ESR tests can only prove the presence of defects caused by unpaired electrons, it cannotd etermine the type of vacancy.T hus, X-ray photoelectron spectroscopy (XPS) was appliedt oi nvestigate the atomic ratios of these three samples to find out their vacancy type.…”

“…[3] XPS can be employed as ac haracterization technique to investigate the surface( up to ad epth of 3nm) chemical components and states of the materials. [1,4,20,21] Based on this, it would be suitable to explore Bi/S ratios obtainedf rom XPS to evaluate the effects of surface defects. TheB i/S atomic ratios of the three samples differed greatly based on the XPS analysis (Table 1), suggesting BS-1 is sulfur-deficient Bi 2 S 3 and BS-3 is bismuth-deficient Bi 2 S 3 ,w hereas the Bi/S atomicr atio of BS-5 is close to the theoretical value (i.e.,B i 2 S 3 ), suggesting no or relatively little element vacancy.M oreover,t he surface valence states of both bismuth and sulfur showeds hifts in the binding energies (see the Supporting Information, Figure S2), which could be attributed to variations in the chemical environmentc aused by sulfur or bismuth vacancies.…”

Construction of 2D‐ZnS@ZnO Z‐Scheme Heterostructured Nanosheets with a Highly Ordered ZnO Core and Disordered ZnS Shell for Enhancing Photocatalytic Hydrogen Evolution

“…A blue shift of 0.4 and 0.3 eV occurs when the etching thickness was increased to 5 nm and 10 nm, respectively. This is due to the presence of defects in the nanocomposite . Furthermore, two additional peaks occur for S2p at different depths of OS6‐60‐6 photocatalyst, further indicating the presence of defects in the nanocomposite.…”

“…This is due to the presence of defects in the nanocomposite. [36] Furthermore, two additional peaks occur for S2p at different depths of OS6-60-6 photocatalyst, further indicating the presence of defects in the nanocomposite. In addition, the portion of the two additional peaks reach at the climax near the interface, indicating the largest amount of defect near the interface layer.…”