Zhu Sipin, Chen Zhiyong, Wang Chunying, Pan Jiahao, Luo Xianping
Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Ganzhou 341000, China.
Materials (Basel). 2022 May 18;15(10):3613. doi: 10.3390/ma15103613.
Different TiO/g-CN (TCN) composites were synthesized by a simple pyrolysis method with TiO xerogel and urea. The structure and physicochemical properties of TCN were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, ultraviolet-visible diffuse reflectance spectrum, X-ray photoelectron spectroscopy, N-adsorption isotherms and electrochemical impedance spectroscopy. Aniline Aerofloat was chosen as a typical degradation-resistant contaminant to investigate the photodegradation activity of TCN under UV irradiation. The results indicated that TCN had higher light absorption intensity, larger specific surface area and smaller particle size compared to pure TiO. Furthermore, TCN had great recycling photocatalytic stability for the photodegradation of Aniline Aerofloat. The photocatalytic activity depends on the synergistic reaction between holes (h) and hydroxyl radicals (·OH). Meanwhile, the direct Z-scheme heterojunction structure of TiO and g-CN postpones the recombination of h and electrons to enhance UV-light photocatalytic activity.
采用简单的热解方法，以二氧化钛干凝胶和尿素合成了不同的TiO/g-CN（TCN）复合材料。通过X射线衍射、扫描电子显微镜、透射电子显微镜、紫外-可见漫反射光谱、X射线光电子能谱、N吸附等温线和电化学阻抗谱对TCN的结构和理化性质进行了表征。选择苯胺浮油作为典型的抗降解污染物，研究了TCN在紫外光照射下的光降解活性。结果表明，与纯TiO相比，TCN具有更高的光吸收强度、更大的比表面积和更小的粒径。此外，TCN对苯胺浮油的光降解具有良好的循环光催化稳定性。光催化活性取决于空穴（h）和羟基自由基（·OH）之间的协同反应。同时，TiO和g-CN的直接Z型异质结结构延缓了h和电子的复合，从而增强了紫外光催化活性。
