Affiliation:
1. Hebei Key Laboratory of Functional Polymer School of Chemical Engineering and Technology Hebei University of Technology 300401 Tianjin China
2. College of Chemical and Textile Engineering Xinjiang University of Science and Technology, Korla China
3. State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences 350002 Fuzhou China
Abstract
AbstractCovalent organic frameworks (COFs) are one type of promising polymer semiconductors in solar‐driven hydrogen production, but majority of COFs‐based photocatalytic systems show low photocatalytic efficiency owing to lack of metal active sites. Herein, we reported II‐Scheme heterojunction frameworks based on COF (TpPa‐1) and metal‐organic framework (HKUST‐1) for highly efficient hydrogen production. The coordination bonding directed self‐assembly of HKUST‐1 on the surface of TpPa‐1 endows the heterojunction frameworks (HKUST‐1/TpPa‐1) with strong interface interaction, optimized electronic structures and abundant redox active sites, thus remarkably boosting photocatalytic hydrogen evolution. The hydrogen evolution rate for optimal HKUST‐1/TpPa‐1 is as high as 10.50 mmol g−1 h−1, which is significantly enhanced when compared with that of their physical mixture (4.13 mmol g−1 h−1), TpPa‐1 (0.013 mmol g−1 h−1) and Pt‐based counterpart (6.70 mmol g−1 h−1). This work offers a facile approach to the construction of noble‐metal‐free II‐Scheme heterojunctions based on framework materials for efficient solar energy conversion.
Funder
Natural Science Foundation of Hebei Province
National Natural Science Foundation of China
National Key Research and Development Program of China