Department of Chemistry, Dalian University of Technology, Dalian 116024, PR China.
J Colloid Interface Sci. 2022 Feb;607(Pt 2):1908-1918. doi: 10.1016/j.jcis.2021.09.161. Epub 2021 Sep 29.
The utilization of mechanical energy to control water pollutants under dark conditions is currently a point of study focus. Herein, biochar -zinc oxide (BC-ZnO) composites with various structures were synthesized by co-pyrolysis of cotton and ZnO at different temperature and used for tribo-catalytic reaction. The introduction of BC can improve charge transmission and separation efficiency. Ultraviolet photoelectron spectra (UPS) and density functional theory (DFT) calculation prove the addition of BC can reduce work function of ZnO, and enhance its electron-donating ability. Specially, suitable adsorption amount is the key factor to improve the tribo-catalytic performance. When the pyrolysis temperature is 600 °C, BC-ZnO has the best degradation efficiency, which can degrade 90% Rhodamine B (RhB) in 75 min, while ZnO can degrade only 38%. On this basis, using bovine serum albumin (BSA) as a model, the effect of tribo-catalytic reaction on controlling proteins in water was studied by fluorescence excitation-emission matrix spectroscopy (3D EEM) and infrared microscope, and the transformation of proteins was further analyzed. This study provides a new strategy to improve the tribo-catalytic performance of ZnO, and explores its application prospects of biological wastewater control.
在黑暗条件下利用机械能控制水中污染物目前是研究的重点。本文通过棉和 ZnO 在不同温度下共热解合成了具有不同结构的生物炭-氧化锌（BC-ZnO）复合材料，并用于摩擦催化反应。BC 的引入可以提高电荷传输和分离效率。紫外光电子能谱（UPS）和密度泛函理论（DFT）计算证明，BC 的添加可以降低 ZnO 的功函数，增强其供电子能力。特别地，合适的吸附量是提高摩擦催化性能的关键因素。当热解温度为 600°C 时，BC-ZnO 具有最佳的降解效率，可在 75 分钟内降解 90%的 Rhodamine B（RhB），而 ZnO 只能降解 38%。在此基础上，以牛血清白蛋白（BSA）为模型，通过荧光激发-发射矩阵光谱（3D EEM）和红外显微镜研究了摩擦催化反应对水中蛋白质的控制效果，并进一步分析了蛋白质的转化。该研究为提高 ZnO 的摩擦催化性能提供了新策略，并探索了其在生物废水控制中的应用前景。
