Wang Min, Guo Pengyao, Zhang Yu, Lv Chunmei, Liu Tingyu, Chai Tianyu, Xie Yuanhua, Wang Youzhao, Zhu Tong
School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110011, China.
School of Resources and Civil Engineering, Northeastern University, Shenyang, 110011, China.
J Hazard Mater. 2018 May 5;349:224-233. doi: 10.1016/j.jhazmat.2018.01.058. Epub 2018 Feb 3.
A series of hollow structure lantern-like Eu(III)-doped g-CN (xEu-CN, x = 1, 2, 3) was firstly synthesized by heating a mixture of melamine, HNO and EuO at 500 °C for 2 h. The phase, morphology and optical properties of the serial xEu-CN samples were characterized by different techniques, including TEM, XRD, FT-IR, SEM, XPS, BET, UV-vis, PL, photocurrent, and EIS. The results indicated that Eu doping extraordinarily enhanced the photocatalytic activity of pure g-CN, and the 2Eu-CN exhibited the highest photocatalytic performance with a 98% (82%) degradation rate for RhB (TC), 6.03 (1.71)-fold of pure g-CN(CN). The higher photocatalytic efficiency is ascribed to the synergy effect of Eu(III) and the hollow structures, which led to a larger surface specific area, bandgap narrowing, enhanced light harvesting ability and efficient charge separation.
首先通过在500℃下加热三聚氰胺、HNO和EuO的混合物2小时，合成了一系列空心结构灯笼状的Eu(III)掺杂g-CN（xEu-CN，x = 1、2、3）。通过不同技术对系列xEu-CN样品的相、形态和光学性质进行了表征，包括透射电子显微镜（TEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、比表面积分析仪（BET）、紫外可见光谱（UV-vis）、光致发光光谱（PL）、光电流和电化学阻抗谱（EIS）。结果表明，Eu掺杂极大地提高了纯g-CN的光催化活性，2Eu-CN表现出最高的光催化性能，对罗丹明B（RhB）（四环素（TC））的降解率为98%（82%），是纯g-CN（CN）的6.03（1.71）倍。较高的光催化效率归因于Eu(III)与空心结构的协同效应，这导致了更大的比表面积、带隙变窄、光捕获能力增强和电荷有效分离。
