Enhanced photocatalytic hydrogen production of noble-metal free Ni-doped Zn(O,S) in ethanol solution

Convenient synthesis of Mn-doped Zn (O,S) nanoparticle photocatalyst for 4-nitrophenol reduction

“…As confirmed by analyses of energy dispersive spectra (EDS), the actual amounts of Mn were 0.53, 0.89, 1.98, and 2.45 for the Mn-doped Zn(O,S) with the Mn precursors at 2.5, 5, 10, and 20%, respectively. The similar behavior was also found in the previous studies [14]. However, the XRD intensity of the catalyst after being doped was lower than undoped, indicating that Mn was successfully doped to the Zn site in the Zn(O,S) host lattice to disturb the lattice flatness.…”

“…After introducing 10% Mn-doped Zn(O,S) catalyst without ethanol, the absorbance did not decrease furthermore, as shown in figure 4c and the reduction did not obviously happen. This can be explained as that more hydrogen ions for the significant 4-NP reduction are needed, while the reduction reaction to produce hydrogen ion was very low without using ethanol as sacrificial reagent, as shown in our previous reports [8,12,14]. The figure 5d shows the 4-NP reduction in the presence of 10% Mn-doped Zn(O,S) with 10% ethanol.…”

Metal Oxysulfides: From Bulk Compounds to Nanomaterials

“…Abdullah et al (2017) synthesized ZnO 1−x S x nanoparticles using zinc(II) acetate and thioacetamide for the photocatalysis of the hydrogen evolution reaction. Gultom et al (2017) in the same group also showed that nickel-doped ZnO 1−x S x nanoparticles were suitable for hydrogen production.…”

Environmentally Benign Photoreactions for Hydrogen Production and Cleavage of N═N bond in Azobenzene over Co-Doped Zn(O,S) Nanocatalyst: The Role of In Situ Generated H+

“…The corresponding peaks of Zn 2p 1/2 and Zn 2p 3/2 spin orbitals were discovered at binding energies of 1045.8 and 1022.9 eV, respectively. 21,27 As a result of introducing a small amount of Co dopant (2.5%) to the Zn(O,S) matrix, a relatively weak intensity of the Co 2p XPS spectrum was obtained, as can be seen in Figure 5b. Such lowintensity peaks were located at 796.1 and 780.9 eV attributed to Co 2p 1/2 and Co 2p 3/2 with their satellite peaks were located at 802.7 and 790.4 eV, respectively.…”

“…For instance, Lian and co-workers reported hydrogen production over Ta 3 N 5 photocatalyst . Further, the interembedded Au–Cu 2 O heterostructure photocatalyst was fabricated by Ma et al Furthermore, our group had developed zinc oxysulfide (Zn­(O,S)) solid solution-based materials with several modifications. − The Zn­(O,S) photocatalyst exhibits a direct and wide band gap which is ∼3.6 eV. The optical properties of Zn­(O,S) could be tuned by introducing defects, and one of the most reported is using an appropriate dopant.…”