A series of ternary sulfide hollow structures have been successfully prepared by a facile glutathione (GSH)-assisted one-step hydrothermal route, where GSH acts as the source of sulfur and bubble template. We demonstrate the feasibility and versatility of this in situ gas-bubble template strategy by the fabrication of novel hollow structures of MInS (M = Cd, Zn, Ca, Mg, and Mn). Interestingly, with the reaction time varying, the hierarchical CdInS microspheres with controlled internal structures can be regulated from yolk-shell, smaller yolk-shell (yolk-shell with shrunk yolk), hollow, to solid. Under visible-light irradiation, all of our prepared CdInS samples with different morphologies were photoactivated. In virtue of the appealing hierarchical hollow structure, the yolk-shell-structured CdInS microspheres exhibited the optimal photocatalytic activity and excellent durability for both the XB degradation and H evolution, which can be ascribed to the synergy-promoting effect of the small crystallite size together with the unique structural advantages of the yolk-shell structure. Thus, we hypothesize that this proof-of-concept strategy paves an example of rational design of hollow structured ternary or multinary sulfides with superior photochemical performance, holding great potential for future multifunctional applications.
Bismuth oxide silicate (Bi2O2SiO3) single-crystalline nanosheets with exposed {001} facets were synthesized for the first time via a facile one-step CTAB-assisted hydrothermal method in the presence of NaOH.
Solar-driven
CO hydrogenation to light olefins holds great potential
as a petroleum-independent process. Herein, a series of Fe5C2 loading on tunable N-doped carbon as photothermal catalysts
are developed to achieve an efficient Fischer–Tropsch synthesis
to olefin (FTO) reaction. Under light irradiation, the optimized catalyst
delivers a selectivity of 55.3% for light olefins (CO2 free)
at a CO conversion of 22.3%, showing 3.5 times the activity of pristine
Fe5C2 catalyst. Experimental characterizations
reveal electron transfer from the N atoms in support to the active
phase of Fe5C2 to construct electron-rich active
sites and therefore to boost the catalytic performance. N-concentration-dependent
activity evaluation and density functional theory calculations ascertain
that pyrrolic N plays a dominant role in promoting CO adsorption and
activation. This study provides an alternative strategy of rational
modulation of support to enhance solar-to-chemical conversion.
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