钴掺杂纳米二氧化钛用于水中阿替洛尔的光降解。
Cobalt doping of titanium oxide nanoparticles for atenolol photodegradation in water.
机构信息
Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451, Saudi Arabia.
Department of Biology, Faculty of Sciences, Taibah University, Al-Medina Al-Munawara, 41477, Saudi Arabia.
出版信息
Environ Sci Pollut Res Int. 2021 Feb;28(6):7423-7430. doi: 10.1007/s11356-020-11071-w. Epub 2020 Oct 8.
Cobalt-doped TiO nanoparticles were prepared and characterized by FT-IR, TEM, SEM, and XRD. The surface morphology was sphere-shaped with ~ 26.46 nm of the size of the nanoparticles. Ninety percent atenolol photodegradation was obtained with 15 mg/L concentration, 40 min stirring time, 2 pH, 2.0 g/L dosage of nanoparticles, 200.0 nm irradiation UV wavelength, and hydrogen peroxide amount 2.0 mL/L at 30 °C temp. Atenolol photodegradation conformed the first-order kinetics with a mechanism comprising atenolol sorption on the doped TiO nanoparticles and its degradation in UV irradiation. Hole (h) and electron (e) pairs are produced by doped TiO nanoparticles, creating hydroxyl free radicals and superoxide oxygen anions. These species break down atenolol.
钴掺杂 TiO2 纳米粒子通过傅里叶变换红外光谱（FT-IR）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和 X 射线衍射（XRD）进行了制备和表征。纳米粒子的表面形态呈球形，粒径约为 26.46nm。在 15mg/L 浓度、40min 搅拌时间、2pH 值、2.0g/L 纳米粒子用量、200.0nm 辐照 UV 波长和 30°C 温度下，添加 2.0mL/L 过氧化氢时，可获得 90%的阿替洛尔光降解率。阿替洛尔的光降解符合一级动力学，其机制包括阿替洛尔在掺杂 TiO2 纳米粒子上的吸附及其在 UV 照射下的降解。掺杂 TiO2 纳米粒子产生空穴（h）和电子（e）对，生成羟基自由基和超氧阴离子。这些物质会破坏阿替洛尔。
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