Marine Chemistry Department, Faculty of Marine Sciences, King Abdulaziz University, P.O. Box 80207, Jeddah, 21589, Saudi Arabia.
National Institute of Oceanography & Fisheries, Qayet Bay, Alexandria, Egypt.
Environ Sci Pollut Res Int. 2022 Jul;29(31):47818-47831. doi: 10.1007/s11356-022-19214-x. Epub 2022 Feb 21.
In an effort for efficient solar energy harvesting, carbon-doped zinc oxide (C-ZnO) nanoparticles with intriguing properties were synthesized by sonicated sol-gel technique with the aid of activated charcoal. Compared to pure ZnO, the incorporation of carbon has drastically promoted the photocatalytic activity of C-ZnO towards the degradation of phenanthrene under illumination of both UV and sunlight. The characterization of the as-synthesized nanoparticles by scanning electron microscope (SEM), UV-vis spectra, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and energy-dispersive X-ray spectroscopy (EDS) confirmed the carbon doping of C-ZnO. The highest degradation rate of phenanthrene was obtained at pH 7 and C-ZnO loading of 0.5 g L. Finally, the kinetic studies of the photocatalytic degradation of phenanthrene by using C-ZnO were well-fitted with the Langmuir-Hinshelwood model and followed the pseudo-first-order rate expression.
为了实现高效的太阳能收集，我们采用超声溶胶-凝胶技术并辅助活性炭合成了具有有趣性质的掺碳氧化锌（C-ZnO）纳米粒子。与纯 ZnO 相比，碳的掺入极大地促进了 C-ZnO 在光照下（包括紫外光和太阳光）对菲的光催化降解活性。通过扫描电子显微镜（SEM）、紫外-可见光谱、傅里叶变换红外（FTIR）光谱、X 射线光电子能谱（XPS）和能谱（EDS）对合成的纳米粒子进行了表征，证实了 C-ZnO 的碳掺杂。在 pH 为 7 和 C-ZnO 负载量为 0.5 g L 时，菲的降解率最高。最后，通过 C-ZnO 光催化降解菲的动力学研究表明，该过程很好地符合 Langmuir-Hinshelwood 模型，并遵循拟一级动力学表达式。
