Highly toxic divalent cadmium causes serious environmental issues. To quickly monitor and/or efficiently remove this potentially toxic metal ion as well as to explore its interfacial chemistry with metal oxides, a sulfur and carbon co‐doped titania (S/C‐TiO₂) composite is synthesized via a facile sol‐gel method with the assistance of sodium lignosulphonate (SLS). The prepared composite displays a well‐crystallized TiO₂ nanostructure comprising the anatase phase. Both S and C, which are derived from the SLS template, are found to enter the TiO₂ lattice. The S/C‐TiO₂ composite exhibits a porous structure with a wide pore size distribution. The newly synthesized composite shows adsorption capability for the potentially toxic metal Cd(II). The adsorption process requires <5 min to reach equilibrium. The measured equilibrium adsorption capacity is 19.42 mg g⁻¹, which is twice as high as that of bare TiO₂. The removal efficiency is as high as 97%. Moreover, the materials are suitable for contaminated solutions over a wide range of pH values and various initial cadmium concentrations. A mechanism for the enhanced adsorption behavior is also proposed.

中文翻译：

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木质素磺酸盐制备的硫碳共掺杂TiO2复合材料及其去除镉的适用性

高毒性的二价镉会导致严重的环境问题。为了快速监测和/或有效去除这种潜在有毒的金属离子，并探索其与金属氧化物的界面化学，通过便捷的溶胶-凝胶法合成了硫和碳共掺杂的二氧化钛（S / C-TiO ₂）复合材料。木质素磺酸钠（SLS）的辅助方法。制备的复合材料显示出包含锐钛矿相的良好结晶的TiO ₂纳米结构。发现来自SLS模板的S和C都进入TiO ₂晶格。S / C-TiO ₂复合材料表现出具有宽孔径分布的多孔结构。新合成的复合材料显示出对潜在有毒金属Cd（II）的吸附能力。吸附过程需要少于5分钟才能达到平衡。测得的平衡吸附容量为19.42 mg g ^-1，是裸TiO _2的两倍。去除效率高达97％。此外，该材料适用于各种pH值和各种初始镉浓度的污染溶液。还提出了增强吸附行为的机理。