Visible spectrum

Composite number

Engineering

Carbonization

Composite material

Catalysis

Nanotechnology

Organic chemistry

Chemistry

Materials science

Hydrogen production

Scanning electron microscope

Environmental pollution

Environmental science

Chemical engineering

Optoelectronics

Hydrogen

Environmental protection

Photocatalysis

Photochemistry

Heterojunction

Crystallography

Dodecahedron

Applied Surface Science

Photocatalytic hydrogen generation is a potential strategy to solve the problem of energy shortage and environmental pollution. In this study, we adopted a novel in-situ growth scheme to construct the [email protected] LDH S-scheme heterojunction composite photocatalyst based on morphology modulation and energy band structure design. The outstanding catalytic performance of the composite photocatalyst can be ascribed to the following aspects: 1) the large specific surface area of ZIF-67 dodecahedron could provide abundant active sites; 2) the serious aggregation of CoAl LDH nanosheets were efficiently broken; 3) the light absorption of the composite catalyst were improved; 4) the recombination of photogenerated electrons and holes is effectively inhibited by the architecture of S-scheme, that abound electrons could involve in hydrogen evolution reactions. Thus, the hydrogen production of [email protected] LDH could reach 606.26 µmol h−1 g−1, which equal to 8.4 and 26.1 times that of pristine ZIF-67 and pure CoAl LDH. This work will provide a new insight in the construction of heterojunction photocatalysts.

ZIF-67 dodecahedron coupled with CoAl-layered double hydroxide as S-scheme heterojunction for efficient visible-light-driven hydrogen evolution