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A layered double hydroxide assembled on a g-C3N4-modified hollow carbon sphere as an adsorbent for the removal of uranium(VI)
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2019-06-04 , DOI: 10.1039/c9qi00590k
Xiaoyu Yuan 1, 2, 3, 4, 5 , Xiaoyan Jing 1, 2, 3, 4 , Jing Yu 1, 2, 3, 4, 6 , Hongsen Zhang 1, 2, 3, 4, 6 , Rongrong Chen 1, 2, 3, 4, 6 , Shouzheng Su 3, 6, 7, 8, 9 , Qi Liu 1, 2, 3, 4, 6 , Milin Zhang 1, 2, 3, 4, 10 , Jun Wang 1, 2, 3, 4, 6
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2019-06-04 , DOI: 10.1039/c9qi00590k
Xiaoyu Yuan 1, 2, 3, 4, 5 , Xiaoyan Jing 1, 2, 3, 4 , Jing Yu 1, 2, 3, 4, 6 , Hongsen Zhang 1, 2, 3, 4, 6 , Rongrong Chen 1, 2, 3, 4, 6 , Shouzheng Su 3, 6, 7, 8, 9 , Qi Liu 1, 2, 3, 4, 6 , Milin Zhang 1, 2, 3, 4, 10 , Jun Wang 1, 2, 3, 4, 6
Affiliation
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In this study, a layered double hydroxide assembled on a g-C3N4-modified hollow carbon sphere with unique flower-like morphology (C3N4-HCS@LDH) was synthesized for the capture of uranium(VI) (U(VI)). The adsorption efficiency was evaluated under the effects of pH, adsorption time, temperature, U(VI) concentration and interfering ions. These results showed that the adsorption process was well fitted by the Langmuir isotherm and pseudo-second-order models. The maximum adsorption amount of C3N4-HCS@LDH was 609.7 mg g−1 at 298 K and pH = 7.0. The adsorption mechanism was mainly attributed to the coordination between O- and N-containing functional groups and U(VI) by XPS results. Moreover, the C3N4-HCS@LDH composite showed high selectivity for U(VI) in an aqueous solution (mg L−1 level) and artificial seawater (μg L−1 level). Therefore, we conclude that the C3N4-HCS@LDH composite is an encouraging material to promote U(VI) enrichment in a seawater environment.
中文翻译：
组装在gC 3 N 4改性的中空碳球上的层状双氢氧化物，作为吸附剂用于去除铀（VI）
在这项研究中，合成了在gC 3 N 4修饰的中空碳球上组装的层状双氢氧化物，具有独特的花状形态（C 3 N 4 -HCS @ LDH）以捕获铀（VI）（U（VI））。在pH，吸附时间，温度，U（VI）浓度和干扰离子的影响下评估了吸附效率。这些结果表明，Langmuir等温线和拟二阶模型很好地拟合了吸附过程。C 3 N 4 -HCS @ LDH的最大吸附量为609.7 mg g -1在298 K和pH = 7.0时。吸附机理主要归因于XPS结果表明，含O和N的官能团与U（VI）之间的配位。此外，将C 3 Ñ 4 -HCS @ LDH复合体表明高选择性U（VI在水溶液中）（毫克的L -1级）和人工海水（微克大号-1电平）。因此，我们得出结论，C 3 N 4 -HCS @ LDH复合材料是在海水环境中促进U（VI）富集的令人鼓舞的材料。
更新日期：2019-06-19
中文翻译：
组装在gC 3 N 4改性的中空碳球上的层状双氢氧化物，作为吸附剂用于去除铀（VI）
在这项研究中，合成了在gC 3 N 4修饰的中空碳球上组装的层状双氢氧化物，具有独特的花状形态（C 3 N 4 -HCS @ LDH）以捕获铀（VI）（U（VI））。在pH，吸附时间，温度，U（VI）浓度和干扰离子的影响下评估了吸附效率。这些结果表明，Langmuir等温线和拟二阶模型很好地拟合了吸附过程。C 3 N 4 -HCS @ LDH的最大吸附量为609.7 mg g -1在298 K和pH = 7.0时。吸附机理主要归因于XPS结果表明，含O和N的官能团与U（VI）之间的配位。此外，将C 3 Ñ 4 -HCS @ LDH复合体表明高选择性U（VI在水溶液中）（毫克的L -1级）和人工海水（微克大号-1电平）。因此，我们得出结论，C 3 N 4 -HCS @ LDH复合材料是在海水环境中促进U（VI）富集的令人鼓舞的材料。
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