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A novel U(vi)-imprinted graphitic carbon nitride composite for the selective and efficient removal of U(vi) from simulated seawater†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-07-13 00:00:00 , DOI: 10.1039/c8qi00522b Xuan Hao 1, 2, 3, 4 , Rongrong Chen 3, 5, 6, 7 , Qi Liu 1, 2, 3, 4, 5 , Jingyuan Liu 1, 2, 3, 4, 5 , Hongsen Zhang 1, 2, 3, 4 , Jing Yu 1, 2, 3, 4 , Zhanshuang Li 1, 2, 3, 4 , Jun Wang 1, 2, 3, 4, 5
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-07-13 00:00:00 , DOI: 10.1039/c8qi00522b Xuan Hao 1, 2, 3, 4 , Rongrong Chen 3, 5, 6, 7 , Qi Liu 1, 2, 3, 4, 5 , Jingyuan Liu 1, 2, 3, 4, 5 , Hongsen Zhang 1, 2, 3, 4 , Jing Yu 1, 2, 3, 4 , Zhanshuang Li 1, 2, 3, 4 , Jun Wang 1, 2, 3, 4, 5
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Extracting uranium(VI) from seawater for future long-term development of nuclear energy in the world is an urgent issue. However, there are still enormous challenges to selectively extract U(VI) from seawater. In this paper, a high selectivity surface U(VI)-imprinted graphitic carbon nitride/β-cyclodextrin composite sorbent was synthesized through a cross-linking method with U(VI) ions, β-cyclodextrin and epichlorohydrin as the template ion, the functional ligand and the cross-linking agent, respectively. The prepared ion-imprinted β-cyclodextrin modified graphitic carbon nitride polymer (IIP-g-C3N4/β-CD) was used for selective extraction of U(VI) from aqueous solution. Effects of different conditions were examined such as solution pH, oscillation time, temperature, etc. The results suggested that the IIP-g-C3N4/β-CD exhibits wonderful adsorption capacity and outstanding selectivity for U(VI) extraction at the ppm level compared to the nonimprinted material. The adsorption process closely correlates with the Langmuir adsorption isotherm model. In addition, the calculated maximum adsorption capacity was 859.66 mg g−1 at 25 °C, which confirmed that the adsorption process is a monolayer chemisorption process. Accordingly, the IIP-g-C3N4/β-CD showed excellent selective adsorption of U(VI) and cycling stability after five adsorption–desorption cycles with little adsorption capacity loss. Moreover, IIP-g-C3N4/β-CD exhibited outstanding U(VI) adsorption efficiency for simulated seawater indicating that IIP-g-C3N4/β-CD can be used as a potential sorbent for the efficient selective adsorption of U(VI) from simulated seawater.
中文翻译：
一种新型的U（vi）印迹石墨氮化碳复合材料，用于从模拟海水中选择性和有效地去除U（vi）†
从海水中提取铀（VI）以用于未来世界上核能的长期发展是一个紧迫的问题。然而，从海水中选择性地提取U（VI）仍然面临巨大挑战。以U（VI）离子，β-环糊精和环氧氯丙烷为模板离子，通过交联法合成了具有高选择性表面U（VI）印迹的石墨氮化碳/β-环糊精复合吸附剂。配体和交联剂。制备的离子印迹β-环糊精改性石墨氮化碳聚合物（IIP-gC 3 N 4 /β-CD）用于选择性萃取U（VI）。检查了不同条件的影响，例如溶液的pH，振荡时间，温度等。结果表明，与非压印材料相比，IIP-gC 3 N 4 /β-CD在ppm级上对U（VI）的萃取具有出色的吸附能力和出色的选择性。吸附过程与Langmuir吸附等温线模型密切相关。另外，在25℃下计算出的最大吸附容量为859.66mg g -1，这证实了吸附过程是单层化学吸附过程。因此，IIP-gC 3 N 4 /β-CD对U（VI）和五个吸附-解吸循环后的循环稳定性，几乎没有吸附容量损失。此外，IIP-gC 3 N 4 /β-CD对模拟海水表现出优异的U（VI）吸附效率，表明IIP-gC 3 N 4 /β-CD可以用作有效选择性吸附U（）的潜在吸附剂。VI）来自模拟海水。
更新日期：2018-07-13
中文翻译：
一种新型的U（vi）印迹石墨氮化碳复合材料，用于从模拟海水中选择性和有效地去除U（vi）†
从海水中提取铀（VI）以用于未来世界上核能的长期发展是一个紧迫的问题。然而，从海水中选择性地提取U（VI）仍然面临巨大挑战。以U（VI）离子，β-环糊精和环氧氯丙烷为模板离子，通过交联法合成了具有高选择性表面U（VI）印迹的石墨氮化碳/β-环糊精复合吸附剂。配体和交联剂。制备的离子印迹β-环糊精改性石墨氮化碳聚合物（IIP-gC 3 N 4 /β-CD）用于选择性萃取U（VI）。检查了不同条件的影响，例如溶液的pH，振荡时间，温度等。结果表明，与非压印材料相比，IIP-gC 3 N 4 /β-CD在ppm级上对U（VI）的萃取具有出色的吸附能力和出色的选择性。吸附过程与Langmuir吸附等温线模型密切相关。另外，在25℃下计算出的最大吸附容量为859.66mg g -1，这证实了吸附过程是单层化学吸附过程。因此，IIP-gC 3 N 4 /β-CD对U（VI）和五个吸附-解吸循环后的循环稳定性，几乎没有吸附容量损失。此外，IIP-gC 3 N 4 /β-CD对模拟海水表现出优异的U（VI）吸附效率，表明IIP-gC 3 N 4 /β-CD可以用作有效选择性吸附U（）的潜在吸附剂。VI）来自模拟海水。
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