College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China.
College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China.
Int J Mol Sci. 2022 Aug 19;23(16):9343. doi: 10.3390/ijms23169343.
To disclose the effect of crystal plane on the adsorption-photocatalytic activity of MnS, octahedral MnS was prepared via the hydrothermal route to enhance the adsorption and photocatalytic efficiencies of tetracycline hydrochloride (TCH) in visible light region. The optimal MnS treated at 433 K for 16 h could remove 94.83% TCH solution of 260 mg L within 180 min, and its adsorption-photocatalytic efficiency declined to 89.68% after five cycles. Its excellent adsorption-photocatalytic activity and durability were ascribed to the sufficient vacant sites of octahedral structure for TCH adsorption and the feasible band-gap structure for visible-light response. In addition, the band gap structure (1.37 eV) of MnS with a conduction band value of -0.58 eV and a valence band value of 0.79 eV was favorable for the generation of O, while unsuitable for the formation of OH. Hence, octahedral MnS was a potential material for the removal of antibiotics from wastewater.
为了揭示晶面对 MnS 吸附-光催化活性的影响，采用水热法制备了八面体 MnS，以提高盐酸四环素（TCH）在可见光区的吸附和光催化效率。在 433 K 下处理 16 h 的最佳 MnS 可在 180 min 内去除 260 mg/L 的 TCH 溶液 94.83%，五次循环后其吸附-光催化效率下降至 89.68%。其优异的吸附-光催化活性和耐久性归因于八面体结构中 TCH 吸附的充足空位和可见光响应的可行能带结构。此外，具有导带值为-0.58 eV 和价带值为 0.79 eV 的能带隙结构（1.37 eV）的 MnS 有利于 O 的生成，而不利于 OH 的形成。因此，八面体 MnS 是一种从废水中去除抗生素的潜在材料。
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