College of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University , Nanjing 210009, P. R. China.
State Key Laboratory Breeding Base of Nuclear Resources and Environment, East China University of Technology , Nanchang 330013, P.R. China.
ACS Appl Mater Interfaces. 2017 Jul 12;9(27):22088-22092. doi: 10.1021/acsami.7b07573. Epub 2017 Jun 29.
A POMs-based sorbent functionalized by phosphate groups: HNaMoMo(PO)O has been successfully isolated under hydrothermal conditions. The cooperative assembly of the ring-shaped polyoxometalate structural building unit {PMo} and MoO tetrahedra linkers gives rise to an unprecedented supersodalite cage containing approximately spherical cavities with a 8.76 Å diameter. As POMs-based inorganic material, compound 1 was first applied as sorbent to adsorb U(VI) from aqueous solution, exhibiting good stability, high efficiency, and selectivity. The maximum sorption capacity reaches 325.9 mg g, which may capture radionuclides through cooperative binding of the phosphate groups. The adsorbed U(VI) could be nearly drastically eluted when using 0.1 M NaCO and the sorption capacity for U(VI) slightly decreased 10.16% through five successive sorption/desorption cycles. This work represents first application of POMs-based inorganic materials as sorbent to adsorb uranium from aqueous solution and provides a feasible approach for the entrapment and recovery of radionuclides.
HNaMoMo(PO)O 在水热条件下成功分离。环状多金属氧酸盐结构单元 {PMo} 和 MoO 四面体连接体的协同组装导致了一个前所未有的超沸石笼，其中包含大约具有 8.76 Å 直径的球形空腔。作为基于多酸的无机材料，化合物 1 首先被用作吸附剂从水溶液中吸附 U(VI)，表现出良好的稳定性、高效率和选择性。最大吸附容量达到 325.9 mg g，这可能是通过磷酸基团的协同结合来捕获放射性核素。当使用 0.1 M NaCO 时，吸附的 U(VI)几乎可以被急剧洗脱，并且通过五次连续的吸附/解吸循环，U(VI)的吸附容量仅略有下降 10.16%。这项工作代表了首次将基于多酸的无机材料作为吸附剂用于从水溶液中吸附铀，并为放射性核素的捕获和回收提供了一种可行的方法。
