College of Resource and Environmental Science, Wuhan University, Wuhan, 430072, People's Republic of China.
Hubei Provincial Collaborative Innovation Center for Water Resources Security, Wuhan University, Wuhan, 430072, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Mar;24(9):8658-8670. doi: 10.1007/s11356-017-8448-0. Epub 2017 Feb 15.
In this study, g-CN was synthesized by thermal polycondensation of melamine and was characterized by X-ray powder diffraction, X-ray photoelectron spectroscopy, UV-visible diffuse reflection spectroscopy, and scanning electron microscopy. Results showed that g-CN degraded sulfadimidine (SMD) under visible light, in which the adsorption and photocatalytic degradation was influenced by pH. The maximum adsorption capacity was achieved at approximately pH 5. The highest degradation rate constant was obtained at strong acid and alkali. In addition, the degradation mechanism of g-CN was evaluated with the help of quencher agents. The intermediates, degradation pathways, and mineralization of SMD were also determined to evaluate the degradation and oxidation ability of g-CN.
在这项研究中，通过三聚氰胺的热缩聚合成了 g-CN，并通过 X 射线粉末衍射、X 射线光电子能谱、紫外-可见漫反射光谱和扫描电子显微镜对其进行了表征。结果表明，g-CN 在可见光下降解磺胺二甲嘧啶（SMD），其中吸附和光催化降解受 pH 值的影响。在大约 pH 5 时达到最大吸附容量。在强酸和强碱条件下，获得了最高的降解速率常数。此外，还借助猝灭剂评估了 g-CN 的降解机制。还确定了 SMD 的中间产物、降解途径和矿化作用，以评估 g-CN 的降解和氧化能力。
