Abstract
The development of high-efficient adsorbents for Hg0 capture in a broad temperature window remains a big challenge. Transition-metal dichalcogenides (TMDs) present great prospects owing to their two-dimensional layered structures and abundant active sulfur species. Here, tungsten disulfide (WS2) and molybdenum disulfide (MoS2) nanosheets are easily synthesized via a molten salt route and employed for Hg0 sequestration. With the elevation of the annealing temperature, the Hg0 capture ability of WS2 nanosheet gradually enhances, while MoS2 nanosheet first increases and then decreases. They both display good mercury removal performances in an enlarged temperature range of 60–260 °C. Acidic flue gas components (i.e., SO2 and NO) subtly interfere the mercury removal process, indicating the prospective application potentials of WS2 and MoS2 nanosheets in thermal plants.
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