SnIn4S8/FeNi2P Z-scheme heterojunction hollow nanorods for photocatalytic hydrogen production

Climate change and natural disasters have stimulated the exploration of renewable energy, photocatalytic hydrogen production utilizing solar energy is considered an effective way. In this study, hollow FeNi 2 -MIL-88 nanorods were synthesized by the hydrothermal method, and then FeNi 2 P was obtained by gas phase phosphorization. Finally, SnIn 4 S 8 was utilized to coat the surface of FeNi 2 P through an in-situ growth method to obtain rod-like SnIn 4 S 8 /FeNi 2 P. The results showed that the hydrogen production of SnIn 4 S 8 /FeNi 2 P reached 18083.93 μmol/g within 3 h. And SnIn 4 S 8 /FeNi 2 P showed good stability. The photocurrent response spectra and electrochemical impedance spectra confirmed that SnIn 4 S 8 /FeNi 2 P had good carrier conductivity and effectively inhibited the reorganization of photogenerated carriers. The modification of SnIn 4 S 8 enabled the construction of a Z-scheme heterojunction between SnIn 4 S 8 and FeNi 2 P. It provided more active sites and promoted the separation of photogenerated carriers, ultimately improving the hydrogen production performance of the SnIn 4 S 8 /FeNi 2 P photocatalyst. It would offer essential insights into the design and development of efficient MOFs-derived photocatalysts.