Hosny Nasser Mohammed, Gomaa Islam, Elmahgary Maryam G, Ibrahim Medhat A
Chemistry Department , Faculty of Science, Port Said University, POB 42522, Port Said, Egypt.
Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, El Sherouk City, Cairo, 11837, Egypt.
Sci Rep. 2023 Aug 30;13(1):14173. doi: 10.1038/s41598-023-41106-4.
Carbon doped ZnO nanoparticles have been synthesized from the thermal decomposition of Zinc citrate precursor. The precursor was synthesized from semi-solid paste and then subjected to calcination at 700 °C to produce ZnO nanoparticles. The precursor and ZnO were characterized by Fourier Transform Infrared Spectroscopy, UV-visible (UV-Vis) spectra, Transmission Electron Microscope, Field Emission Scanning Electron Microscope, Energy Dispersive Analysis by X-ray (EDAX), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results ensured the formation of hexagonal 2D-ZnO nanoparticles with a layer thickness of 25 nm. The optical band gap of ZnO was determined and found to be 2.9 eV, which is lower than the bulk. Photocatalytic degradation of Fluorescein dye as an anionic dye and Rhodamine B as a cationic dye was evaluated via C-ZnO NPs under UV irradiation. ZnO displayed 99% degradation of Fluorescein dye after 240 min and a complete photocatalytic degradation of Rhodamine B dye after 120 min under UV irradiation.
通过柠檬酸锌前驱体的热分解合成了碳掺杂的氧化锌纳米颗粒。该前驱体由半固态糊体制备而成，然后在700℃下进行煅烧以制备氧化锌纳米颗粒。采用傅里叶变换红外光谱、紫外可见光谱、透射电子显微镜、场发射扫描电子显微镜、X射线能谱分析、X射线粉末衍射和X射线光电子能谱对前驱体和氧化锌进行了表征。结果证实形成了层厚为25nm的六方二维氧化锌纳米颗粒。测定了氧化锌的光学带隙，发现其为2.9eV，低于体相氧化锌。通过碳掺杂氧化锌纳米颗粒在紫外光照射下评估了作为阴离子染料的荧光素染料和作为阳离子染料的罗丹明B的光催化降解性能。在紫外光照射下，氧化锌在240分钟后对荧光素染料的降解率达到99%，对罗丹明B染料在120分钟后实现了完全光催化降解。
