A new family of actinide sorbents with more open porous structure: Fibrous functionalized silica microspheres

doi:10.1016/j.cej.2019.123892

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	A new family of actinide sorbents with more open porous structure: Fibrous functionalized silica microspheres
	Yuan, Li-Yong; Gao, Ge; Feng, Chuan-Qi; Chai, Zhi-Fang; Shi, Wei-Qun
刊名	CHEMICAL ENGINEERING JOURNAL
	2020
卷号	385
关键词	MESOPOROUS SILICA EFFICIENT REMOVAL HIGH-PERFORMANCE AQUEOUS-SOLUTION U(VI) CAPTURE URANIUM ADSORPTION CARBON COMPOSITE HYDROXIDE
DOI	10.1016/j.cej.2019.123892
英文摘要	No one could have failed to notice the fact that the basic research on the separation of nuclear fuel associated radionuclides is currently a hot topic as a result of the universality of nuclear industry. Herein, a kind of fibrous mesoporous silica microspheres and its derivatives tailored by amine (APS-F-SiO2), carboxyl (COOH-F-SiO2), phosphate (DPTS-F-SiO2) and amidoxime (AD-F-SiO2), respectively, were successfully fabricated for high efficient U(VI) capture from aqueous solution. The synthesized sorbents were well characterized by SEM, FT-IR, N-2 sorption-desorption measurement and TGA, which confirms achievement of the functionalization. The U(VI) sorption onto these microsphere sorbents was then explored in detail. The results clearly show that these microsphere materials especially APS-F-SiO2 and COOH-F-SiO2 are indeed effective U(VI) sorbents, in terms of considerable sorption capacity of similar to 200 mg/g, the short equilibrium time of less than 30 min, the ionic strength-independent nature, and desirable selectivity towards U(VI) over a range of competing ions. Moreover, the sorbed U(VI) ions can be easily desorbed from the sorbents by controlling a lower pH, e.g. pH 1.0, and the reclaimed sorbent can be reused without obvious reduction of U(VI) uptake even after 4 sorption-desorption cycles, implying an excellent stability and reusability of the sorbents. These sorbents also keep high performance in U(VI) sorption even following 400 kGy gamma irradiation in water, which further highlights the opportunity for this kind of materials in radionuclide separation. The finding of the present work offers new platform for developing actinide sorbents applied in various practical cases.
学科主题	Engineering
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19843]
专题	2020专题
作者单位	Shi, WQ (corresponding author), Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Yuan, Li-Yong,Gao, Ge,Feng, Chuan-Qi,et al. A new family of actinide sorbents with more open porous structure: Fibrous functionalized silica microspheres[J]. CHEMICAL ENGINEERING JOURNAL,2020,385.
APA	Yuan, Li-Yong,Gao, Ge,Feng, Chuan-Qi,Chai, Zhi-Fang,&Shi, Wei-Qun.(2020).A new family of actinide sorbents with more open porous structure: Fibrous functionalized silica microspheres.CHEMICAL ENGINEERING JOURNAL,385.
MLA	Yuan, Li-Yong,et al."A new family of actinide sorbents with more open porous structure: Fibrous functionalized silica microspheres".CHEMICAL ENGINEERING JOURNAL 385(2020).