期刊
NANOMATERIALS
卷 12, 期 18, 页码 -出版社
MDPI
DOI: 10.3390/nano12183115
关键词
coaxial electrospinning; graphene oxide; Cr(VI) adsorption; heavy metal wastewater treatment
类别
资金
- National Natural Science Foundation of China [51805460]
- Fujian Provincial Department of Science and Technology [2020H6003, 2022H6036, 2021J011196]
- Guangdong Basic and Applied Basic Research Foundation [2022A1515010923, 2022A1515010949]
A new one-step strategy was developed to maximize the adhesion of graphene oxide (GO) particles to the surface of polyvinylidene fluoride (PVDF) nanofibers, achieving efficient adsorption of heavy metal ions. The as-prepared fiber surface had a maximized GO load, with an adsorption capacity for Cr(VI) of 271 mg/g and a 99% removal rate achieved within 2 hours. After multiple adsorption-desorption tests, the adsorption removal efficiency remained above 80%.
Mass loading of functional particles on the surface of nanofibers is the key to efficient heavy metal treatment. However, it is still difficult to prepare nanofibers with a large number of functional particle loads on the surface simply and efficiently, which hinders the further improvement of performance and increases the cost. Here, a new one-step strategy was developed to maximize the adhesion of graphene oxide (GO) particle to the surface of polyvinylidene fluoride (PVDF) nanofibers, which was combined with coaxial surface modification technology and blended electrospinning. The oxygen content on the as-prepared fiber surface increased from 0.44% to 9.32%, showing the maximized GO load. The increased adsorption sites and improved hydrophilicity greatly promoted the adsorption effect of Cr(VI). The adsorption capacity for Cr(VI) was 271 mg/g, and 99% removal rate could be achieved within 2 h for 20 mL Cr(VI) (100 mg/L), which was highly efficient. After five adsorption-desorption tests, the adsorption removal efficiency of the Cr(VI) maintained more than 80%, exhibiting excellent recycling performance. This simple method achieved maximum loading of functional particles on the fiber surface, realizing the efficient adsorption of heavy metal ions, which may promote the development of heavy-metal-polluted water treatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据