School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an, 710061, China.
School of Civil Engineering, Key Laboratory of Water Supply & Sewage Engineering of Ministry of Housing and Urban-rural Development, Chang'an University, Xi'an, 710061, China.
Chemosphere. 2021 Jan;263:128120. doi: 10.1016/j.chemosphere.2020.128120. Epub 2020 Aug 28.
An easily separation composite, magnetic chitosan@bismuth tungstate coated by silver (MCTS-Ag/BiWO), was successfully synthesized by the simple hydrothermal method. Moreover, the MCTS-Ag/BiWO demonstrated excellent adsorption/photocatalytic removal of Cu(II) in aqueous solution. Adsorption played a leading role in the synergistic reaction. The catalysts were characterized by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The effects on adsorption of Cu(II) were investigated, which included illumination, pH, and initial concentration. The experimental results showed that the theoretical maximum adsorption capacity of Cu(II) (181.8 mg/g) was achieved under simulated solar light irradiation with the optimal pH value of 6.0, indicating that illumination could enhance the adsorption of Cu(II) by MCTS-Ag/BiWO. Meanwhile, the composite exhibited desirable adsorption ability of Cu(II) after 5 cycles. The copper ion adsorption fitted well with pseudo-second-order kinetic model and its isotherm followed Freundlich model.
一种易于分离的复合材料，磁壳聚糖@钨酸铋负载银（MCTS-Ag/BiWO），通过简单的水热法成功合成。此外，MCTS-Ag/BiWO 表现出优异的吸附/光催化去除水溶液中的 Cu(II)性能。吸附在协同反应中起主导作用。通过傅里叶变换红外光谱（FT-IR）、X 射线衍射（XRD）和扫描电子显微镜（SEM）对催化剂进行了表征。考察了吸附 Cu(II)的影响因素，包括光照、pH 值和初始浓度。实验结果表明，在最佳 pH 值为 6.0、模拟太阳光照射下，Cu(II)的理论最大吸附容量（181.8mg/g）得以实现，表明光照可以增强 MCTS-Ag/BiWO 对 Cu(II)的吸附。同时，该复合材料在 5 次循环后仍表现出良好的 Cu(II)吸附能力。铜离子吸附符合准二级动力学模型，其等温线遵循 Freundlich 模型。
