Ionothermal synthesis of Zn 1−x Cd x S solid solutions with efficient photocatalytic H 2 production via elemental-direct-reactions

Band-Gap Modulation for Enhancing NO Photocatalytic Oxidation over Hollow ZnCdS: A Combined Experimental and Theoretical Investigation

“…While the peak of S 2p in Zn 0.5 Cd 0.5 S shifted 0.2 eV toward the higher binding energy, it indicated that more electrons were transferred from S to Zn and Cd . The XPS results confirmed the electronic coupling between the introduction of Cd and ZnS, further indicating the successful preparation of Zn 1– x Cd x S …”

“…The high Cd content may tend to produce individual CdS nanoparticles, which were deposited and embedded on the surface or in the pores of the Zn 1– x Cd x S shell layer and were not conducive to the adsorption and desorption of the reactant. The introduction of Cd facilitates the reduction of the Zn 1– x Cd x S band gap and thus improves the absorption of visible light . However, the high content leads to an upward shift of the valence band (VB) and the oxidation capacity’s reduction.…”

“…17 Because Zn and Cd have similar electronegativity, many researchers tend to combine the advantages of ZnS and CdS to prepare Zn 1−x Cd x S solid solutions. Huang 18 et al synthesized ZnCdS solid solutions using the ionothermal technique, which had good photocatalytic activity at large-scale synthesis. Pan 19 et al used a coprecipitation process to prepare inexpensive ZnCdS, which exhibited good visible light hydrogen production stability.…”

Discrete Supertetrahedral T5 Selenide Clusters and Their Se/S Solid Solutions: Ionic‐Liquid‐Assisted Precursor Route Syntheses and Photocatalytic Properties

“…As shown in Figure S10 in the Supporting Information, upon irradiation with visible light, electrons in the T5 clusters are excited from the VB to the CB, and then are transferred and trapped by metal platinum generated from photoreduction of [PtCl 4 ] 2À .T he excited electrons then reduce H + from the water to H 2 on the platinum surface. [24] Thus,t he hydrogene volution activities of the clusterc ompounds T5-3-T5-6 increaseg radually. [23] Similarly to the T5-1 and T5-2 clusters in the photodegradation experiments, with increasing content of doped sulfur in the T5-3-T5-6 clusters,t he CB becomes more negative (Figure 6b), thereby affording as tronger drivingf orce for the photogeneration of electrons for H + reduction,w hich is the main factor determining the photocatalytic activity.…”

“…In fact, the synthesis of new crystalline chalcogenides by using soluble chalcogenides as precursors has been found to be quite successful. [6a, 7b,c,e,h, 12] Recently,D ehnenand co-workers extendeds uch precursor routes to the synthesis of discrete polyanions in ILs, for example, "Zeoball" [Sn 36 Ge 24 Se 132 ] 24À and [Sn 32.5 Ge 27.5 Se 132 ] 24À . [11f] Therefore, the step-by-step precursor methodw as considered worthy of furthere xploration for the synthesis of new crystalline chalcogenides in ILs.…”