Iodide and bromide ions in surface and ground waters (typically less than 0.05 mg/L for iodide and 0.5 mg/L for bromide) could react with natural organic matters under oxidative disinfection process and produce toxic disinfectant by-products. Therefore, removal of iodides and bromides in water treatment is desirable for improving drinking water quality. We have synthesized a micro-nano Bi₂O₃-Bi₂S₃ composite via a carbogenic sphere-supported synthesis strategy. A hydrothermal processing of sucrose resulted in uniform spherical carbogenic microspheres, which served as an excellent substrate for reaction between Bi(NO₃)₃ and Na₂SO₄ in emulsion, forming Bi₂O₃-Bi₂(SO₄)₃ composites, which was then converted into Bi₂O₃-Bi₂S₃ after calcination. Using 8 g/L of this material Bi₂O₃-Bi₂S₃, 87.69% of iodide at an initial concentration of 0.05 mg/L was removed after 3 h of contact, and 86.38% of bromide at an initial concentration of 0.5 mg/L was removed after 14 h. Such effective removal efficiency was retained when used in artificial groundwater treatment. Overall, this study developed a new method to produce the Bi₂O₃-Bi₂S₃ composite in high yield, and the as-synthesized Bi₂O₃-Bi₂S₃ composites exhibited high removal efficiencies toward I⁻ and Br⁻ through adsorption mechanism.

地表水和地下水中的碘化物和溴化物离子（碘化物通常小于0.05毫克/升，溴化物通常小于0.5毫克/升）在氧化消毒过程中会与天然有机物发生反应，并产生有毒的消毒副产物。因此，在水处理中去除碘化物和溴化物对于改善饮用水质量是理想的。我们已经通过碳纤维化球支持的合成策略合成了微纳米Bi ₂ O ₃ -Bi ₂ S ₃复合材料。蔗糖的水热加工产生均匀的球形碳化物微球，这是Bi（NO ₃）₃与Na ₂ SO ₄之间反应的极好的底物在乳液中形成Bi ₂ O ₃ -Bi ₂（SO ₄）₃复合材料，然后在煅烧后将其转化为Bi ₂ O ₃ -Bi ₂ S ₃。使用8 g / L的这种材料Bi ₂ O ₃ -Bi ₂ S ₃，在接触3小时后，以0.05 mg / L的初始浓度除去87.69％的碘化物，以0.5的初始浓度除去86.38％的溴化物。 14小时后去除mg / L。当用于人造地下水处理时，这种有效的去除效率得以保持。总的来说，这项研究开发了一种新的生产Bi _2的方法ø ₃ -Bi ₂小号₃以高收率合成，并且所合成的Bi ₂ ö ₃ -Bi ₂小号₃复合材料朝向我显示出高的去除效率^-和Br ^-通过吸附机构。