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.