本研究探索了磺化还原氧化石墨烯的制备及其对碱性染料的吸附性能。通过接枝含有芳香自由基的磺酸根到还原氧化石墨烯(rGO)来制备磺化还原氧化石墨烯(S-rGO)纳米片材。通过红外光谱、X射线光电子能谱和扫描电镜对合成的吸附剂磺化还原氧化石墨烯(S-rGO)进行了表征，结果表明磺酸根被成功地接枝到氧化石墨烯上。本研究系统地研究了pH、时间和吸附剂量等对吸附行为的影响。吸附实验结果表明，吸附过程遵从准二级动力学模型和Langmuir模型，表明该吸附由表面反应过程所控制，属于单分子层吸附。吸附解吸实验中碱性橙21、硫黄素T和罗丹明B的吸附率均大于99%，解析率分别达到98.81%、86.63%和94.44%，表明吸附剂S-rGO对碱性染料有很好的吸附解吸性能且可重复使用。使用该材料处理工业废水可防止有害染料污染农产品后在食物链中地不断富集，从而危害人类健康。

The preparation of sulfonated reduced graphene oxide and its adsorption capacity towards basic dyes were investigated in this study. Sulfonated reduced graphene oxide nanosheets (S-rGO) were prepared through grafting aromatic radical-containing sulfonic acid onto chemically reduced graphene oxide (rGO). The synthesized adsorbent sulfonated reduced graphene oxide (S-rGO) was characterized by fourier-transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results showed that the sulfonate was successfully grafted onto graphene oxide (GO). The effects of pH, time and adsorbent dose on adsorption behavior were systematically studied. The results of the adsorption experiments showed that the adsorption process followed the quasi-second-order kinetic model and the Langmuir model, indicating that the adsorption was controlled by the surface reaction process and belonged to monolayer adsorption. In the adsorption and desorption experiments, the adsorption rates of basic orange 21, thioflavine T and rhodamine B were all greater than 99%, with the desorption rates as 98.81%, 86.63% and 94.44%, respectively, indicating that the sorbent S-rGO had good adsorption, desorption and reuse capacities. The use of this material to treat industrial wastewater could prevent the contamination of agricultural products from harmful dyes and their accumulation in the food chain, thereby threatening human health.

国家自然科学青年科学基金项目（21605028）；广州市科技计划项目（201704020024）