Double Z-scheme system of α-SnWO4/UiO-66(NH2)/g-C3N4 ternary heterojunction with enhanced photocatalytic performance for ibuprofen degradation and H2 evolution.

• A novel α-SnWO 4 /UiO-66(NH 2)/g-C 3 N 4 ternary photocatalyst was prepared by solvothermal method. • The α-SW 75 /UNCN exhibits the superior photocatalytic performance for Ibuprofen degradation and H 2 evolution. • The •O 2 - and •OH are confirmed as the main reactive species. • The possible mechanism of photocatalytic was explored. [Display omitted] In this work, we successfully prepared regular hexagonal prism porous structure g-C 3 N 4 (CN), and designed α-SnWO 4 and UiO-66(NH 2) on porous CN for constructing novel ternary α-SnWO 4 /UiO-66(NH 2)/g-C 3 N 4 (α-SW/UNCN) hybrid photocatalyst by solvothermal approach. The α-SW 75 /UNCN composite showed better photocatalytic performance, and the removal rate of Ibuprofen (IPF) reached 95.5% within 2 h and the H 2 evolution efficiency reached 2105 μmol g−1 h−1 under simulated sunlight, which were 2.5 times and 21 times higher than those of α-SW (42.5% and 105 μmol g−1 h−1). The TOC removal efficiency of IPF can reach to 29%, showing higher mineralization ability compared with α-SW. In addition, the trapping experiment and ESR experiment proved that •O 2 - and •OH radicals played most important part in the photodegradation of IPF pollutants. The improved photocatalytic performance of α-SW/UNCN was owing to the construction of n-p-n type double Z-scheme heterojunction which enhanced carries separation. This work will provide a method for preparing novel and efficiency ternary composite catalyst for antibiotic contaminant degradation and H 2 production. [ABSTRACT FROM AUTHOR]