摘要
In this work, a Ni–Co bimetallic ZIF (BMZIF) dodecahedron material has been synthesized by the precipitation approach and then used for simultaneously photoelectrocatalytic degradation of sulfamethoxazole (SMX) and hydrogen production. The combination of Ni/Co loading in ZIF structure increased the specific surface area 1484 (m 2 g −1 ) and photocurrent density (0.4 mA cm −2 ), which can facilitate the good charge transfer efficiency. In presence of peroxymonosulfate (PMS, 0.1 mM), the complete degradation of SMX (10 mg L −1 ) was achieved at initial pH of 7 within 24 min, with the pseudo-first-order rate constants of 0.18 min −1 and TOC removal efficiency of 85 %. Radical scavenger experiments affirm that • OH radicals were the primary oxygen reactive species to drive the SMX degradation. Along with SMX degradation at the anode, the H 2 production was observed at the cathode (140 μmol cm −2 h −1 ), which was 1.5 and 3 times higher than that of Co-ZIF and Ni-ZIF, respectively. The superior catalytic performance of BMZIF was assigned to the distinctive internal structure and synergistic effect between ZIF and Ni/Co bimetals, which improves light absorption and charge conduction efficiency. This study may provide insight into the new way to treat polluted water and simultaneously produce green energy using bimetallic ZIF in a PEC system.