Maouche Chanez, Zhou Yazhou, Peng Jinjun, Wang Shuang, Sun Xiujuan, Rahman Nasir, Yongphet Piyaphong, Liu Qinqin, Yang Juan
School of Materials Science and Engineering, Jiangsu University Zhenjiang Jiangsu 212013 P. R. China
School of Energy and Power Engineering, Jiangsu University Zhenjiang Jiangsu 212013 P. R. China.
RSC Adv. 2020 Mar 26;10(21):12423-12431. doi: 10.1039/d0ra01630f. eCollection 2020 Mar 24.
Three-dimensional (3D) graphene-based aerogels have attracted widespread interest as promising photocatalysts for dye degradation and hydrogen production. Herein, we have developed a 3D nitrogen-doped graphene aerogel (3DNG) from graphitic carbon nitride combined with graphene oxide (GO). The nitrogen dopant in the 3D aerogel was achieved a thermal treatment at 1000 °C, and the 3D aerogel catalyst could retain its 3D porous structure after the thermal treatment. The 3DNG was characterized FTIR, Raman, TEM, UV-vis, XPS spectroscopies and BET analysis, and the results indicated that this 3DNG with a large surface area of 536 m g and a band gap of 2.42 eV demonstrated a high adsorption capacity and enhanced methylene blue degradation and hydrogen production under visible light irradiation. Characterization also identified that the porous 3D structure with hydrogen bonding and π-π interactions and better charge transfer resulting from the nitrogen doping are the major reasons for the enhanced photocatalytic performance over this 3DNG catalyst.
三维（3D）石墨烯基气凝胶作为用于染料降解和制氢的有前景的光催化剂引起了广泛关注。在此，我们通过将石墨相氮化碳与氧化石墨烯（GO）结合，开发了一种三维氮掺杂石墨烯气凝胶（3DNG）。通过在1000℃下进行热处理实现了3D气凝胶中的氮掺杂，并且3D气凝胶催化剂在热处理后可以保留其3D多孔结构。通过傅里叶变换红外光谱（FTIR）、拉曼光谱、透射电子显微镜（TEM）、紫外可见光谱、X射线光电子能谱（XPS）和比表面积分析仪（BET）对3DNG进行了表征，结果表明，这种具有536 m²/g大表面积和2.42 eV带隙的3DNG在可见光照射下表现出高吸附容量以及增强的亚甲基蓝降解和产氢能力。表征还确定，具有氢键和π-π相互作用的多孔3D结构以及氮掺杂导致的更好的电荷转移是这种3DNG催化剂光催化性能增强的主要原因。
