Hanh Nguyen Hong, Thi Minh Nguyet Quan, Van Chinh Tran, Duong La Duc, Xuan Tien Tran, Van Duy Lai, Hoa Nguyen Duc
Institute of Engineering Physics, Academy of Military Science and Technology 17 Hoang Sam Street, Cau Giay District Hanoi City Vietnam
School of Engineering Physics, Hanoi University of Science and Technology (HUST) No. 1 Dai Co Viet Street Hanoi City Vietnam.
RSC Adv. 2024 May 3;14(21):14672-14679. doi: 10.1039/d4ra01345j. eCollection 2024 May 2.
ZnO nanomaterials have been extensively used as photocatalysts for the removal of pollutants in aqueous environments. This study explores the enhanced photocatalytic performance of porous ZnO coral-like nanoplates synthesized a one-pot wet-chemical method and subsequent annealing treatment. Characterization through scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, photoluminescence (PL) spectroscopy, and Brunauer-Emmett-Teller (BET) measurements confirmed the nanoplates' porous structure, single-crystal structure, 100 nm thickness, and 80 nm pore size. These unique structural characteristics of the ZnO coral-like nanoplates enabled effective photodegradation of the organic dye rhodamine B (RhB) under visible light irradiation. Under simulated sunlight, the ZnO photocatalyst exhibited exceptional performance, achieving a 97.3% removal rate of RhB after 210 minutes of irradiation. The prepared ZnO photocatalyst also showed remarkable photostability and regeneration capability for RhB photodegradation with a decreased efficiency of less than 15% after eight testing cycles. The potential mechanism of the ZnO photocatalyst toward RhB degradation was also studied and is discussed in detail.
氧化锌纳米材料已被广泛用作光催化剂,用于去除水环境中的污染物。本研究探索了通过一锅湿化学法合成及后续退火处理制备的多孔氧化锌珊瑚状纳米片增强的光催化性能。通过扫描电子显微镜(SEM)、高分辨率透射电子显微镜(HRTEM)、粉末X射线衍射(XRD)、能量色散X射线光谱(EDX)、拉曼光谱、光致发光(PL)光谱和布鲁诺尔-埃米特-泰勒(BET)测量进行表征,证实了纳米片的多孔结构、单晶结构、100nm的厚度和80nm的孔径。氧化锌珊瑚状纳米片的这些独特结构特征使得其在可见光照射下能够有效地光降解有机染料罗丹明B(RhB)。在模拟太阳光下,氧化锌光催化剂表现出优异的性能,在照射210分钟后,罗丹明B的去除率达到97.3%。所制备的氧化锌光催化剂还表现出显著的光稳定性和罗丹明B光降解的再生能力,在八个测试循环后效率降低不到15%。还研究了氧化锌光催化剂对罗丹明B降解的潜在机制,并进行了详细讨论。