Tuning the photocatalytic/electrocatalytic properties of MoS₂/MoSe₂ heterostructures by varying the weight ratios for enhanced wastewater treatment and hydrogen production

Abstract

The 2D/2D-MoS2/MoSe2 catalysts with good photocatalytic/electrocatalytic properties can be potential materials for wastewater treatment and hydrogen production.

In Situ Grown Vertically Oriented Wrinkled MoSe2 Nanosheets over Different Substrates as Bifunctional Electrocatalysts for Water Splitting

“…The Mo 3d spectrum (Figure e) for MoSe 2 -Ni typically exhibits two doublet peaks at 231.66 eV for Mo 3d 3/2 and 228.33 eV for Mo 3d 5/2 , corresponding to the metallic (1T) phase of MoSe 2 , and another doublet peak at energies (232.68 eV for Mo 3d 3/2 and 229.1 eV for Mo 3d 5/2 ) corresponding to the semiconducting (2H) phase of MoSe 2 , while the peaks at 235.74 eV (3d 3/2 ) belong to Mo 6+ . This observation reveals the formation of hybrid 1T (34%) and 2H (66%) contributions of MoSe 2 in the MoSe 2 -Ni electrode. ,− The Se 3d spectrum for MoSe 2 -Ni (Figure f) typically exhibits peaks, corresponding to the Se 3d 5/2 (∼54.24 eV) and Se 3d 3/2 (∼55.0 eV) along with SeO x (∼58.7 and ∼59.5 eV), possibly due to the partial oxidation of Se edges. ,, During the hydrothermal synthesis of MoSe 2 on different substrates, such as Ni foam and CCP, the underlying mechanism may vary. One possible reason for the formation of SeO x species during the synthesis on Ni foam but not on CCP could be attributed to the difference in the chemical interactions at the precursors/substrate interface.…”

Revolutionizing the Role of Solar Light Responsive BiVO4/BiOBr Heterojunction Photocatalyst for the Photocatalytic Deterioration of Tetracycline and Photoelectrocatalytic Water Splitting

“…Evaluation of the degree of mineralization of the organic matter along with the degradation of the organic pollutants is important. To determine the amount of mineralization of TC, TOC, and COD was carried out [ 49 ]. Elevated COD and TOC readings suggested that the antibiotic, TC contained a significant amount of organic matter.…”

Interface engineering of heterogeneous transition metal chalcogenides for electrocatalytic hydrogen evolution

“… 34 The planar heterostructures are also reported between MoS 2 and MoSe 2 , which are synthesized by the chemical vapor deposition (CVD) growth method, 35 and exhibit distinguished properties with the high surface area, the improved synergistic effect and a narrow bandgap. 36 Therefore, in our work, we have systematically investigated the active sites and the underlying catalytic mechanism for the HER in the TMD heterostructures from the first-principles calculations, and we found that the phase interface could activate the active sites in the basal plane and efficiently improve the HER performance of the TMD heterostructures.…”