期刊
ADVANCED COMPOSITES AND HYBRID MATERIALS
卷 5, 期 2, 页码 1180-1195出版社
SPRINGERNATURE
DOI: 10.1007/s42114-022-00446-x
关键词
Janus nano-absorbent; Periodic mesoporous organic silica; Phenol-formaldehyde resin; Double adsorption; Polluted water
资金
- National Natural Science Foundation of China [21071115]
- Shaanxi Province Natural Science Foundation [2020JZ-44]
- Key Laboratory of Se-enriched Products Development and Quality Control, Ministry of Agriculture and Rural Affairs/National-Local Joint Engineering Laboratory of Se-enriched Food Development [Se-2020A01]
- Shaanxi Key Science and Technology Innovation Team Project [2019TD-007]
In this study, Janus PF&PMO nano-adsorbent with an asymmetric structure was prepared and found to efficiently adsorb heavy metal ions and organic dyes in water. The nano-adsorbent showed potential for effective use in sewage treatment systems.
Heavy metal ions and organic dyes are the main harmful substances in natural water bodies. At the same time, single-component treatment can be challenging to cope with the increasingly severe water pollution circumstances. In this work, Janus phenol-formaldehyde resin (PF) and periodic mesoporous organic silica (PMO) nanoparticles with an asymmetric structure are prepared, using PF microspheres as seeds and PMO for branch growth. The hydroxyl groups on the PF surface and the large specific surface area of PMO facilitate the efficient adsorption of heavy metal ions and organic dyes by utilizing chemical and physical properties, respectively. The maximum adsorption of Janus PF&PMO for -Cd2+ in water reaches 17.07 mg/g. The adsorption behavior fits well with the pseudo-second-order kinetic model and Langmuir adsorption isotherm, suggesting monolayer and chemical adsorption as main mechanisms. Moreover, the adsorption of Janus PF&PMO for the organic dye methyl orange (MO) fits the pseudo-second-order kinetic model and Freundlich adsorption isotherm model with a maximum adsorption of 98.21 mg/g, suggesting monolayer and physical adsorption as main mechanisms. Therefore, Janus PF&PMO nano-adsorbent is expected to be used effectively in sewage treatment systems.
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