Photocatalytic hydrogen evolution and simultaneously converting high-concentration of thiols into disulfides with excellent yield under visible-light

Abstract

Simultaneously efficient utilization of photon-generated carriers to realize the selectively photocatalytic oxidation of organics coupled with hydrogen-evolution has become a hotspot in the energy sector. A battery of CdS/P25/Ni2P (SxOyP)...

Visible Light Photocatalytic Hydrogen Evolution Paired with Excellent Intramolecular Coupling of Dithiols into Sulfurous Heterocyclic Compounds over CdS/P25/Ni2P

“…On the basis of the reported method, , electron paramagnetic resonance (EPR) spin trapping technology was adopted to detect the intermediate for investigating the reaction intermediate in the photocatalytic process . The detected EPR signals from this dual photocatalytic system containing DMPO (20 mM), DTT (30 mM), and S 1 O 1 P (1 mg/mL) at pH = 6.0 are displayed in Figure b.…”

“…However, a new peak at 280 nm appears after photocatalytic reactions when CdS and composite photocatalysts are selected as the photocatalysts. This phenomenon can be interpreted for the emergence of new molecules, which has been tested by the 1 H NMR technique according to the reported literature to figure out its specific structure and concentration, 41 resulting in Figure S8. As for DTT, there are five characteristic peaks existing theoretically; however, a peak of DTT is obscured by the solvent peak located at 2.50 ppm.…”

“…As schematically illustrated in Figure S1a, CdS/P25/Ni 2 P (S x O y P) composite photocatalysts were prepared through the method reported previously and the detailed process is provided in Supplementary Note 1 …”

“…S1a, CdS/P25/Ni 2 P (S x O y P) composite photocatalysts were prepared through the method reported previously and the detailed process is provided in Supplementary Note 1. 41 The crystallinity and phase details of the prepared photocatalysts were measured by X-ray diffraction (XRD), which was carried out using a Bruker D8 Advance diffractometer with a Cu Kα radiation source at 25 °C. The XRD patterns of S 1 O 1 P and precursors were collected between 2θ = 10 and 90°with a scan rate of 1.5°/min.…”

Strongly coupled interface facilitating charge separation to the improved visible light-driven hydrogen production on CdS@polydopamine/NiS photocatalyst

“…With regard to pure CdS, the main characteristic peaks at approximately 24.8, 26.5, 28.1, 36.6, 43.6, 47.8, and 51.8 belong to the (100), (002), ( 101), ( 102), (110), (103), and (112) crystalline planes of hexagonal CdS (JCPDS 41-1049), respectively. 17 The strong intensity of diffraction peaks and the absence of impurity peaks indicate CdS with a good crystal structure. Obviously, the XRD patterns of CdS@pDA are similar to that of pristine CdS, implying that CdS maintains a crystalline structure, while the pDA shell presents an amorphous structure feature and has little effect on the peak intensity of CdS, which is in line with a previous report.…”