Bare and oxygen doped graphitic carbon nitride were synthetized by the thermal polymerization of melamine (CN-M) and the mechanical mixtures of melamine and cyanuric acid, respectively, at 550°C for 4 h. The ratios of melamine and cyanuric acid were 1:0.5, 1:1 and 1:2 (CN-MCA1, CN-MCA2 and CN-MCA3). The content of oxygen increased from 1.88 wt.% (CN-M) to 3.93 wt.% (CN-MCA3) and the specific surface area increased from 14 to 41 m² g^-1. The prepared CN materials were characterized by the elemental analysis, UV-Vis diffuse reflectance, X-ray diffraction, Fourier transform infrared spectrometry, the physisorption of nitrogen, scanning electron and high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, the determination of zeta potentials, the Mott-Schottky method

The addition of cyanuric acid led to partial changes in the CN morphology, as documented by occurrence of CN tubes, increase in the specific surface area and was a source of additional -O- and -OH moieties which modified the CN surface in addition to the spontaneous oxygenation observed in CN-M. The above effects positively influenced photocatalytic activity of the CN materials as demonstrated using Rhodamine B (RhB) and the Ofloxacin antibiotics. The photocatalytic decomposition of Ofloxacin was more efficient than that of RhB and differed in kinetics (first-order vs. zero-order reaction). The reusability and stability of the CN materials was verified by repeating batch photocatalytic decompositions of Ofloxacin experiments for five times.

分别通过三聚氰胺（CN-M）的热聚合以及三聚氰胺和氰尿酸的机械混合物在550°C下合成4 小时，来合成裸露的和掺杂氧的石墨氮化碳。三聚氰胺和氰尿酸的比例为1：0.5、1：1和1：2（CN-MCA1，CN-MCA2和CN-MCA3）。氧含量从1.88  wt。％（CN-M）增加到3.93  wt。％（CN-MCA3），比表面积从14增加到41 m ² g ^-1。通过元素分析，UV-Vis漫反射，X射线衍射，傅立叶变换红外光谱，氮的物理吸附，扫描电子和高分辨率透射电子显微镜，X射线光电子能谱，测定来表征所制备的CN材料。电位，莫特-肖特基方法

氰尿酸的添加导致CN形态的部分变化，如CN管的出现所证明的，比表面积的增加，并且是除-O-和-OH部分外还修饰CN表面的来源。在CN-M中观察到自发氧合。如使用罗丹明B（RhB）和氧氟沙星抗生素所证明的，上述效果对CN材料的光催化活性产生了积极影响。氧氟沙星的光催化分解比RhB更为有效，并且动力学（一级反应与零级反应）不同。通过重复分批进行氧氟沙星实验的光催化分解五次，验证了CN材料的可重用性和稳定性。