Positioning hydrogen reaction sites by constructing CdS/CoNiMoS₄ heterojunctions for efficient photocatalytic hydrogen evolution

Abstract

The high gravimetric energy density of hydrogen makes it an ideal chemical fuel to address the issues of fossil fuel depletion and environmental pollution. Even though, the transition metal sulfides...

Effect of Phosphorus-Doped Phase-Modulated WS2 Nanosheets on CdS Nanorods for Highly Efficient Photocatalytic Hydrogen Production

“…The figure makes it obvious that a significant peak intensity is observed at 2θ = 28.1° associated with (101) diffraction plane. The remaining peaks at diffraction angles 24.6, 26.39, 36.4, 43.6, 47.7, 51.6, 52.47, 58.0, 66.5, 68.7, and 75.4° is associated with the planes (100), (002), (102), (110), (103), (112), (201), (202), (203), (210), and (105), respectively (JCPDS card no: 41-1049) . It is interesting to note that no additional peaks were visible in CdS/WS 2 and CdS/WS 2 -P nanostructures, which is mainly attributed to the minimal concentration of WS 2 and WS 2 -P nanostructures.…”

“…Since there are areas with different crystallographic orientations, the smaller particle size may increase the grain boundary density, which, in turn, may cause the XRD peaks to become broader. Furthermore, the diffraction patterns of CdS, CdS/ WS 2 , and CdS/WS 2 -P is examined, and it was obtained that the incorporation of 2H-WS 2 and 1T-2H WS 2 -P nanostructures onto CdS nanorods makes no difference in XRD patterns 46 It is interesting to note that no additional peaks were visible in CdS/WS 2 and CdS/WS 2 -P nanostructures, which is mainly attributed to the minimal concentration of WS 2 and WS 2 -P nanostructures. Further, it is evidenced from the diffraction pattern of each nanostructure that the chemical composition of the crystalline phases has not altered the peak positions so that we can ensure the structural stability of the as-synthesized photocatalysts.…”

Controlled synthesis of 2D–2D conductive metal–organic framework/g-C3N4 heterojunctions for efficient photocatalytic hydrogen evolution

“…1–4 Hydrogen is an excellent energy carrier with a high energy density and causes zero pollution. 5,6 Inspired by the theory of artificial photosynthesis mechanism, photocatalytic water-splitting to produce clean and nontoxic hydrogen is a very promising technology for converting light energy into chemical energy. 7 It offers a straightforward, environmentally friendly, and recyclable approach to producing hydrogen energy.…”