Liu Shanshan, Cheng Shaoli, Zheng Jiale, Liu Junhui, Huang Mingju
Henan Joint International Research Laboratory of New Energy Materials and Devices, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
J Chem Phys. 2024 Oct 21;161(15). doi: 10.1063/5.0226195.
ZnO/g-C3N4 heterojunction modified with Ag nanoparticles (ZnO/CN/Ag) was synthesized by depositing ZnO nanorods/Ag nanoparticles onto g-C3N4 nanosheets. Under xenon lamp irradiation, 99% of Rhodamine B (RhB) was degraded by ZnO/CN/Ag-5% composite within 30 min, which was much higher than the degradation efficiency of ZnO and ZnO/CN. The synergistic effect of g-C3N4 and ZnO, along with the localized surface plasmon resonance effect of Ag NPs, contributes to the improvement of photocatalytic performance. Ag nanoparticle provides another charge transfer path from g-C3N4 to ZnO, which speeds up the separation of electron-hole pairs. Meanwhile, the catalyst had good stability and recyclability. Finite-difference time-domain method and the density functional theory were used to obtain the charge transfer process. The photodegradation process has been studied in depth.
通过将ZnO纳米棒/Ag纳米颗粒沉积到g-C3N4纳米片上，合成了用Ag纳米颗粒修饰的ZnO/g-C3N4异质结（ZnO/CN/Ag）。在氙灯照射下，ZnO/CN/Ag-5%复合材料在30分钟内降解了99%的罗丹明B（RhB），这远高于ZnO和ZnO/CN的降解效率。g-C3N4和ZnO的协同效应以及Ag NPs的局域表面等离子体共振效应有助于提高光催化性能。Ag纳米颗粒提供了另一条从g-C3N4到ZnO的电荷转移路径，加速了电子-空穴对的分离。同时，该催化剂具有良好的稳定性和可回收性。采用时域有限差分法和密度泛函理论来获得电荷转移过程。对光降解过程进行了深入研究。
