Abstract
A new type of strong adsorbent nanostructure Cu3SnS4@C has been first designed and fabricated by two-step hydrothermal synthesis. For removal of anionic dye methyl orange (MO), in striking contrast to the weak adsorption of bare C nanospheres (0.7 mg/g), the Cu3SnS4@C nanostructures exhibit a very strong pH-sensitive adsorption performance with a maximum adsorbability of 65.99 mg/g at pH 5.0 and a minimum value of 8.11 mg/g at pH 11.0, in initial concentrationof 70 mg/L MO. The samples’ adsorption mechanism could be well explained by pseudo-second-order kinetic model. Such significantly enhanced adsorbability of Cu3SnS4@C could be ascribed to the synergistic adsorption effect of Cu3SnS4 nanoparticles at C nanospheres, which can induce holes transfer and thus lead tomassive positive active sites generation on Cu3SnS4@C available for synergistic adsorption anion dye.
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