Effect of low-temperature solvothermal route on controlled growth mechanism of Se rich-ZnSe(en)0.5 templates for ZnO NR-Zn1-xCdxSe photoelectrodes

Porous Zn1–xCdxSe/ZnO Nanorod Photoanode Fabricated from ZnO Building Blocks Grown on Zn Foil for Photoelectrochemical Solar Hydrogen Production

“…35 In Se 3d XPS graph, a binding energy peak appeared at 53.8 and 54.65 eV for Se 3d 5/2 and Se 3d 3/2 , respectively, signifying the chemical state Se 2− . 24,36 The enhanced XPS peak intensity might be due to the presence of elemental Se on the surface of the Zn 1−x Cd x Se/ZnO NR-160 photoanode. The N 1s peak was detected at 400.02 eV, belonging to the N−H bond of the ZnSe(en) 0.5 /ZnO NR electrode.…”

“…Furthermore, ultraviolet–visible (UV–Vis) absorption spectroscopy was used to examine the optical characteristics of the ZnO NR and ZnSe­(en) 0.5 /ZnO NR electrodes. The absorption edges of these electrodes were 700–750 nm, suggesting the adsorption of excessive Se particles on the surface of the ZnO NR, and the corresponding bandgap value is shown in Figure S2. In addition, transmission electron microscopy (TEM) analysis was used to examine the microstructure of the specific organic–inorganic hybrid ZnSe­(en) 0.5 sheet for the ZnSe­(en) 0.5 /ZnO NR photoanode. Figure a,b shows the TEM and high-resolution transmission electron microscopy (HRTEM) image of the selected organic–inorganic ZnSe­(en) 0.5 , representing a sheet-like morphology.…”

“…Bae et al constructed inorganic–organic CdSe­(en) 0.5 /CIS/TiO 2 heterostructure photoanode with changing amounts of cadmium/selenium precursors for PEC hydrogen production. Patil et al , developed inorganic–organic hybrid ZnSe­(en) 0.5 using low- and high-temperature synthesis methods and further converted it into a dual nanoarchitecture photoelectrode (Zn 1– x Cd x Se and ZnO NR) via the cation exchange method for PEC hydrogen production. On the other hand, porous Zn 1– x Cd x Se nanostructures synthesized on the TiO 2 NR photoanode achieved a photocurrent density of 6.6 mA cm –2 .…”

Fast one-pot synthesis of a Se-rich MnCdSe solid solution for highly efficient cocatalyst-free photocatalytic H2 evolution

“…Notably, an apparent peak at about 55.32 eV assigned to Se(0) is observed for Mn 0.68 Cd 0.32 Se 1+ x when compared with CdSe, indicating the presence of elemental Se on the surface of Se-rich MnCdSe solid solutions as determined by ICP-AES. 26 Moreover, the peaks of Cd 3d and Se 3d shift to lower binding energies after forming Se-rich MnCdSe, further suggesting the introduction of excess Se atoms with different electronegativities. As illustrated in the electron paramagnetic resonance (EPR) spectra (Fig.…”