Herein, we explore ag eneral Cu 2Àx Sn anocube template-assisted and reverse cation exchange-mediated growth strategy for fabricating hollowmultinary metal sulfide. Unlike the traditional cation exchange method controlled by the metal sulfide constant, the introduction of tri-n-butylphosphine (TBP) can reverse cation exchange to give as eries of hollowm etal sulfides.Avariety of hollowm ultinary metal sulfide cubic nanostructures has been demonstrated while preserving anisotropic shapes to the as-synthesized templates, including binary compounds (CdS,Z nS,A g 2 S, PbS,S nS), ternary compound (CuInS 2 ,Z n x Cd 1Àx S), and quaternary compound (single-atom platinum anchored Zn x Cd 1Àx S; Zn x Cd 1Àx S-Pt 1 ). Experimental and density functional theory (DFT) calculations showt hat the hollowm etal sulfide semiconductors obtained could significantly improve the separation and migration of photogenerated electron-hole pairs.Owing to the efficient charge transfer,t he Zn x Cd 1Àx S-Pt 1 exhibited outstanding photocatalytic performance of CO 2 to CO,w ith the highest CO generation rate of 75.31 mmol h À1 .

Hierarchical Co3O4@CdIn2S4 p–n heterojunction photocatalysts have been constructed by an in situ surface growth method for CO2 reduction with visible light.

Delicate modulations of CO2 activation and charge carrier separation/migration are challenging, yet imperative to augment CO2 photoreduction efficiency. Herein, by supporting diethylenetriamine (DETA)‐functionalized Cd0.8Zn0.2S nanowires on the exterior surface of hollow Co9S8 polyhedrons, hierarchical Co9S8@Cd0.8Zn0.2S‐DETA nanocages are fabricated as an S‐scheme photocatalyst for reducing CO2 and protons to produce syngas (CO and H2). The amine groups strengthen adsorption and activation of CO2, while the “nanowire‐on‐nanocage” hierarchical hollow heterostructure with an S‐scheme interface boosts separation and transfer of photoinduced charges. Employing Co(bpy)32+ as a cocatalyst, the optimal photocatalyst effectively produces CO and H2 in rates of 70.6 and 18.6 µmol h−1 (i.e., 4673 and 1240 µmol g−1 h−1), respectively, affording an apparent quantum efficiency of 9.45% at 420 nm, which is the highest value under comparable conditions. Ultraviolet photoelectron spectroscopy, Kelvin probe, and electron spin resonance confirm the S‐schematic charge‐transfer process in the photocatalyst. The key COOH* species responsible for CO2‐to‐CO reduction is detected by in‐situ diffuse reflectance infrared Fourier transform spectroscopy and endorsed by density functional theory calculations, and thus a possible CO2 reduction mechanism is proposed.

The construction of NiTiO3/Cd0.5Zn0.5S heterostructures is presented as all-solid-state direct Z-scheme photocatalysts for efficient and stable hydrogen production with visible light. The NiTiO3/Cd0.5Zn0.5S hybrids are assembled by growing Cd0.5Zn0.5S nanoparticles...

Branch-like ZnS–DETA/CdS hierarchical heterostructures are synthesized as an efficient photocatalyst for visible light CO2 reduction in a tandem system.