Qiao Yu, Han Qian, Li Dong, Li Hongji, Wei Bing, Che Guangbo, Jiang Wei, Guan Weisheng
Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 P. R. China
School of Environmental Science and Engineering, Chang'an University Xi'an 710054 P. R. China
RSC Adv. 2019 Dec 16;9(71):41591-41602. doi: 10.1039/c9ra08489d. eCollection 2019 Dec 13.
A novel Ag/metal-organic framework/graphitic carbon nitride (Ag/HKUST-1/g-CN, AHC) photocatalyst was prepared an growth strategy and photo-deposition technique for environmental remediation. The as-obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), N adsorption-desorption isotherm measurement, UV-vis diffuse reflection spectroscopy (UV-vis DRS), and photoluminescence (PL) spectroscopy. The results indicated that the hybrids have large surface area, mesoporous structure and enhanced visible-light absorption. The as-prepared hybrid samples exhibited considerable improvement in photocatalytic activity and stability for rhodamine B (RhB) degradation under visible light irradiation ( > 420 nm). In addition, they also have good adsorption properties. Compared to the pure g-CN and Ag/g-CN, the 5% AHC photocatalyst showed superior photocatalytic activity. Moreover, 5% AHC exhibits good photocatalytic activity even after four cycles. Additionally, the active species trapping and electron spin resonance (ESR) experiments indicated that h and ·OH were the main active species.
通过一种生长策略和光沉积技术制备了一种新型的银/金属有机框架/石墨相氮化碳（Ag/HKUST-1/g-CN，AHC）光催化剂用于环境修复。采用X射线衍射（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、N吸附-脱附等温线测量、紫外-可见漫反射光谱（UV-vis DRS）和光致发光（PL）光谱对所得样品进行了表征。结果表明，该杂化物具有大表面积、介孔结构和增强的可见光吸收。所制备的杂化样品在可见光照射（>420 nm）下对罗丹明B（RhB）降解的光催化活性和稳定性有显著提高。此外，它们还具有良好的吸附性能。与纯g-CN和Ag/g-CN相比，5%的AHC光催化剂表现出优异的光催化活性。此外，5%的AHC即使在四个循环后仍表现出良好的光催化活性。此外，活性物种捕获和电子自旋共振（ESR）实验表明，h⁺和·OH是主要的活性物种。
