MoS/WO 复合材料的低温下对亚甲基蓝的吸附性能。
The Combination of MoS/WO and Its Adsorption Properties of Methylene Blue at Low Temperatures.
机构信息
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310014, China.
出版信息
Molecules. 2019 Dec 18;25(1):2. doi: 10.3390/molecules25010002.
It was found previously that neither monomer MoS nor WO is an ideal material for the adsorption of organic dyes, while MoS/WO composites synthesized by a two-step hydrothermal method have outstanding adsorption effects. In this work, the chemical state of each element was found to be changed after combination by X-ray photoelectron spectroscopy analysis, which lead to their differences in adsorption performance. Moreover, the adsorption test of methylene blue on MoS/WO composites was carried out under a series of temperatures, showing that the prepared composites also had appreciable adsorption rates at lower temperatures. The adsorption process could be well described by the Freundlich isothermal model and the pseudo-second order model. In addition, the particle-internal diffusion model simulation revealed that the internal diffusion of the particles played an important role in the whole adsorption process.
先前发现，无论是单体 MoS 还是 WO，都不是有机染料吸附的理想材料，而通过两步水热法合成的 MoS/WO 复合材料则具有出色的吸附效果。在这项工作中，通过 X 射线光电子能谱分析发现，各元素的化学状态在结合后发生了变化，这导致它们在吸附性能上存在差异。此外，还在一系列温度下对 MoS/WO 复合材料对亚甲基蓝的吸附进行了测试，结果表明，所制备的复合材料在较低温度下也具有相当高的吸附速率。吸附过程可以很好地用 Freundlich 等温模型和准二级模型来描述。此外，颗粒内扩散模型的模拟表明，颗粒的内扩散在整个吸附过程中起着重要作用。
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