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Rapid synthesis of ZnO nanowires and nanoplates with highly enhanced photocatalytic performance
Applied Surface Science ( IF 6.7 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.apsusc.2020.148484
Shipra Choudhary , Kavita Sahu , Aditi Bisht , Biswarup Satpati , Satyabrata Mohapatra

Abstract ZnO nanowires and nanoplates with extremely enhanced photocatalytic performance were prepared via one-step facile thermal decomposition of zinc acetate dihydrate and well characterized by FESEM, TEM, STEM-HAADF, EDX, XRD, PL, XPS, UV-Vis and Raman spectroscopy. FESEM and TEM studies revealed ZnO nanowires, nanoplates and few nanorods in the sample prepared at 300°C, while increase in the thermal decomposition temperature to 500°C led to the formation of ZnO nanoparticles and nanorods. XRD results revealed hexagonal wurtzite ZnO nanostructures with crystallite size variation from 47 to 34 nm with increase in thermal decomposition temperature, while PL studies showed decrease in band gap from 3.31 to 3.26 eV along with significant quenching of defect emissions as the thermal decomposition temperature was increased from 300 to 500°C. ZnO nanowires and nanoplates prepared at 300⁰C exhibited extremely enhanced photocatalytic performance and led to almost complete decomposition of methylene blue (MB) and methyl orange (MO) in only 6 and 32 minutes, respectively. The extremely strong photocatalytic performance of ZnO nanowires and nanoplates makes them exciting candidates for solar-driven water purification. The possible mechanisms of growth of ZnO nanowires and nanoplates and their enhanced photocatalytic performance were proposed.

中文翻译:

快速合成具有高度增强的光催化性能的 ZnO 纳米线和纳米片

摘要 通过对二水醋酸锌进行一步简便的热分解制备了具有极强光催化性能的 ZnO 纳米线和纳米片,并通过 FESEM、TEM、STEM-HAADF、EDX、XRD、PL、XPS、UV-Vis 和拉曼光谱对其进行了表征。FESEM 和 TEM 研究表明,在 300°C 下制备的样品中存在 ZnO 纳米线、纳米片和少量纳米棒,而热分解温度升高至 500°C 导致形成 ZnO 纳米颗粒和纳米棒。XRD 结果显示六方纤锌矿 ZnO 纳米结构随着热分解温度的增加微晶尺寸从 47 nm 变化到 34 nm,而 PL 研究显示带隙从 3.31 eV 减小到 3.26 eV,同时随着热分解温度的增加缺陷发射显着淬灭从 300 到 500°C。在 300⁰C 下制备的 ZnO 纳米线和纳米片表现出极大的光催化性能,并分别在 6 分钟和 32 分钟内使亚甲蓝 (MB) 和甲基橙 (MO) 几乎完全分解。ZnO 纳米线和纳米片极强的光催化性能使它们成为太阳能驱动水净化的令人兴奋的候选者。提出了ZnO纳米线和纳米片的可能生长机制及其增强的光催化性能。ZnO 纳米线和纳米片极强的光催化性能使它们成为太阳能驱动水净化的令人兴奋的候选者。提出了ZnO纳米线和纳米片的可能生长机制及其增强的光催化性能。ZnO 纳米线和纳米片极强的光催化性能使它们成为太阳能驱动水净化的令人兴奋的候选者。提出了ZnO纳米线和纳米片的可能生长机制及其增强的光催化性能。
更新日期:2021-03-01
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