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 concentration of 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 to massive positive active sites generation on Cu3SnS4@C available for synergistic adsorption anion dye.

中文翻译：

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用于高效去除阴离子染料的 Cu3SnS4@C 纳米结构的新设计和制造

摘要 首先通过两步水热合成设计并制备了一种新型强吸附纳米结构Cu3SnS4@C。对于阴离子染料甲基橙 (MO) 的去除，与裸碳纳米球的弱吸附 (0.7 mg/g) 形成鲜明对比的是，Cu3SnS4@C 纳米结构表现出非常强的 pH 敏感性吸附性能，最大吸附量为 65.99 mg在 pH 5.0 时为 /g，在 pH 11.0 时最小值为 8.11 mg/g，初始浓度为 70 mg/L MO。样品的吸附机制可以用拟二级动力学模型很好地解释。Cu3SnS4@C的这种显着增强的吸附能力可归因于Cu3SnS4纳米颗粒在C纳米球上的协同吸附作用，