Removal of arsenic(III) from water by 2D zeolitic imidazolate framework-67 nanosheets

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	Removal of arsenic(III) from water by 2D zeolitic imidazolate framework-67 nanosheets
	Zhao, Pin; Jian, Meipeng; Xu, Rongming; Zhang, Qi; Xiang, Chao; Liu, Ruiping; Zhang, Xiwang; Liu, Huijuan
刊名	ENVIRONMENTAL SCIENCE-NANO
	2020-11-01
卷号	7 期号:11 页码:3616-3626
ISSN号	2051-8153
英文摘要	Ultrathin two-dimensional (2D) porous materials, which can efficiently capture harmful pollutants from aqueous solutions are highly desired yet scarcely reported. Herein, 2D zeolitic imidazolate framework-67 porous nanosheets (ZIF-67-NS) were first applied as a promising adsorbent for arsenic(iii) removal from water. An ultrathin structure was observed for the as-prepared ZIF-67-NS with an average thickness of 1.3 nm. The resulting ZIF-67-NS shows outstanding water stability in alkaline conditions. Owing to the unique dimensionality, ZIF-67-NS exhibited a significantly higher adsorption capacity (516 mg g(-1)) and faster uptake kinetics (2 h) toward As(iii) than its 3D bulk-type counterpart (ZIF-67-NB). The superior adsorption performance in the ultrathin ZIF-67-NS is attributed to the coordinatively unsaturated Co(ii) atoms, which are open sites dominating adsorption, as evidenced by X-ray photoelectron and Fourier transform infrared spectroscopy. On the other hand, the phase transformation in ZIF-67-NB was observed from the 3D bulk structure to the 2D layered structure during the As(iii) absorption. Lastly, ZIF-67-NS can be efficiently regenerated with few losses in the adsorption capacity after 3 cycles. Overall, this work represents a practical case of As(iii) removal by a 2D crystalline porous material and demonstrates its potential for the development of 2D nanomaterial adsorbents.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44986]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhao, Pin,Jian, Meipeng,Xu, Rongming,et al. Removal of arsenic(III) from water by 2D zeolitic imidazolate framework-67 nanosheets[J]. ENVIRONMENTAL SCIENCE-NANO,2020,7(11):3616-3626.
APA	Zhao, Pin.,Jian, Meipeng.,Xu, Rongming.,Zhang, Qi.,Xiang, Chao.,...&Liu, Huijuan.(2020).Removal of arsenic(III) from water by 2D zeolitic imidazolate framework-67 nanosheets.ENVIRONMENTAL SCIENCE-NANO,7(11),3616-3626.
MLA	Zhao, Pin,et al."Removal of arsenic(III) from water by 2D zeolitic imidazolate framework-67 nanosheets".ENVIRONMENTAL SCIENCE-NANO 7.11(2020):3616-3626.