Photothermal\nCatalytic\nRemoval of 1,2-DCE with High\nHCl Selectivity over the Brønsted Acid-Enriched Sulfur-Doped\nMOFs

Chlorinated volatile organic compounds\ncome from a wide\nrange of\nsources and are highly toxic, posing a serious threat to biological\nhealth and the environment. Herein, a high-efficiency and energy-saving\nphotothermal synergistic catalytic oxidation method was developed\nfor the removal of 1,2-dichloroethane (1,2-DCE). Compared to traditional\nthermocatalysis, the 1,2-DCE conversion over Ru–U6S in photothermal\nsynergistic catalysis at 340 °C increased by approximately 44%\nnot only reducing energy consumption but also avoiding the instability\nof MOF structure caused by high reaction temperature. The excellent\nphotothermal catalytic oxidation activity was derived from the synergistic\neffect of photo- and thermocatalysis. Ru–U6S demonstrated excellent\n1,2-DCE adsorption capacity and stronger light utilization and could\nproduce more reactive oxygen species (<sup>•</sup>OH and <sup>•</sup>O<sub>2</sub><sup>–</sup>) after light illumination,\nwhich participated in the oxidation reaction, promoting the release\nof the active site of the catalyst. The results of H<sub>2</sub>O-TPD\nand NH<sub>3</sub>-DRIFTS exhibited that the use of S-containing ligands\nin the synthesis process increased the hydroxyl groups and Brønsted\nacid sites, significantly improved the selectivity of CO<sub>2</sub> and HCl in the oxidation process, and reduced the release of chlorine-containing\nbyproducts. This work provides a high-efficiency and energy-saving\nstrategy for removing chlorinated volatile organic compounds and increasing\nthe selectivity of ideal products directly with MOFs directly.