10.1021/acs.est.5b04278.s001 Haitao Zhao Haitao Zhao Gang Yang Gang Yang Xiang Gao Xiang Gao Cheng Heng Pang Cheng Heng Pang Samuel W. Kingman Samuel W. Kingman Tao Wu Tao Wu Hg<sup>0</sup> Capture over CoMoS/γ-Al<sub>2</sub>O<sub>3</sub> with MoS<sub>2</sub> Nanosheets at Low Temperatures American Chemical Society 2016 MoS 2 nanosheets IWI 2O MoS 2 Nanosheets Hg 0 unsulfided cobalt atoms TMDC CUS Hg 0 Capture 2016-01-19 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Hg_sup_0_sup_Capture_over_CoMoS_Al_sub_2_sub_O_sub_3_sub_with_MoS_sub_2_sub_Nanosheets_at_Low_Temperatures/2086279 CoMoS/γ-Al<sub>2</sub>O<sub>3</sub> sorbent was prepared via incipient wetness impregnation (IWI) and sulfur-chemical vapor reaction (S-CVR) methods and tested in terms of its potential for Hg<sup>0</sup> capture. It was observed that the CoMoO/γ-Al<sub>2</sub>O<sub>3</sub> showed a Hg<sup>0</sup> capture efficiency around 75% at a temperature between 175 and 325 °C while CoMoS/γ-Al<sub>2</sub>O<sub>3</sub> achieved almost 100% Hg<sup>0</sup> removal efficiency at 50 °C. The high removal efficiency for CoMoS/γ-Al<sub>2</sub>O<sub>3</sub> remained unchanged for 2000 min in the test. Its theoretical capacity for Hg<sup>0</sup> capture was found to be 18.95 mg/g based on the Elovich model. The ability of this material for Hg<sup>0</sup> capture is atributed to the MoS<sub>2</sub> nanosheets coated on surface of the maro- and meso-pores of γ-Al<sub>2</sub>O<sub>3</sub>. These MoS<sub>2</sub> are two-dimensional transition-metal dichalcogenide (2D TMDC) assembled with unsulfided cobalt atoms at the edges. It is believed that these MoS<sub>2</sub> nanosheets provided dense active sites for Hg<sup>0</sup> capture. The removal of Hg<sup>0</sup> at low temperatures was achieved via the combination of Hg<sup>0</sup> with the chalcogen (S) atoms on the entire basal plane of the MoS<sub>2</sub> nanosheets with coordinative unsaturated sites (CUS) to form a stable compound, HgS.