Constructing a built-in electric field by anchoring highly dispersed Zn single atoms on UiO-66-NH₂ for efficient CO₂ photoreduction

Abstract

Solar-driven carbon dioxide (CO2) reduction into valuable chemicals or feedstock is of great significance for the sustainable development of the environment and energy. Herein, we presented a photo-induced reduction method...

An Unprecedented Strategy to Fabricate Inside/Surface Homojunction in Bismuth Oxychloride for Efficient Photocatalysis

“…Single crystalline phase photomaterials with unique surface structures, such as different geometric and electronic structures from bulk structures, are promising to lead special photocatalytic properties . The discrepancy between the surface and bulk has a chance to induce interfacial electric field formation between the surface layer and bulk structure (also can be called the inside), thereby forming inside/surface homojunction with stability and low cost, which is more attractive for efficient charge separation. − Oxygen vacancies (O V ), which feature an oxygen atom departure, always induce unsaturated coordinated edges, steps, and kinks that serve as highly active catalytic sites. , Especially, the change of atomic arrangement and coordination, electronic structure, and chemical properties arising from oxygen defects will efficiently regulate the energy level of photomaterials. − By now, the creation of oxygen vacancies has been proved to exhibit a high potency for photocatalytic activity. Based on the above, extensive methods for oxygen vacancy creation, such as NaOH etching, NaBH 4 reduction, and ethylene glycol auxiliary, have been employed. − However, due to the difference of atomic distribution in various exposed facets, the chemical properties and concentration of oxygen vacancies that are constructed by different means are usually different.…”

Progress in photocatalytic CO2reduction based on single-atom catalysts

“…Compared with the original UiO-66-NH 2 in the lack of the photosensitizer or hole sacrificial agent, its performance under ultraviolet-visible light is improved by about 5 times. 201 The outcomes of this study open up new possibilities for the production of highly effective photocatalysts with single-atom sites for photocatalytic CO 2 conversion.…”

Titanium Carbide MXenes Cocatalyst with Graphitic Carbon Nitride for Photocatalytic H2 Production, CO2 Reduction, and Reforming Applications: A Review on Fundamentals and Recent Advances

“…The Ti 3 C 2 is the most widely used MXenes with g-C 3 N 4 to construct a 2D/2D heterojunction to enhance charge separation efficiency with higher visible light absorption for photocatalytic CO 2 reduction with H 2 O to produce CO, CH 4 , and other products. 179 The performance of Ti 3 C 2 for CO 2 reduction is entirely dependent on the type of sacrificial reagent, etching time, and other parameters. Recently, Ti 3 C 2 was synthesized using a Ti 3 AlC precursor with HF etching agent at different etching times, as shown in Figure 21a.…”