阳离子聚合
聚乙烯醇
材料科学
甲基橙
吸附
化学工程
银纳米粒子
傅里叶变换红外光谱
纤维素
催化作用
亚甲蓝
羧甲基纤维素
纳米颗粒
复合数
核化学
高分子化学
化学
复合材料
光催化
有机化学
纳米技术
冶金
工程类
钠
作者
Yuhang Li,Yunhao Luan,Wanyi Liu,Cong Wang,Hui Cao,Pengtao Liu
摘要
Metal nanoparticles play an essential role in catalyzing the degradation of dyes in industrial wastewater. In order to improve the catalytic reduction and discoloration performance of silver nanoparticles (Ag NPs) to cationic dyes and facilitate recovery, we report an improved method to prepare cellulose nanofibrils/polyvinyl alcohol (CNF/PVA) porous composite hydrogel and use it to support metal nanoparticles. Silver ions were reduced to Ag NPs by the in situ reduction method after being adsorbed on the surface of the hydrogel by electrostatic adsorption, and the maximum adsorption capacity was about 136.4 mg/g. The obtained CNF/PVA/Ag NPs (CPA) composite hydrogel was characterized by scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and energy dispersive spectroscopy. Furthermore, we demonstrate the efficient utilization of composite hydrogel as a container in the discoloration of methylene blue (cationic dye) and methyl orange (cationic dye) in the presence of NaBH4. The hydrogel was quickly recovered and reused without a decrease in activity for five cycles. It showed fantastic potential in water resources protection and catalytic application.
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