An ingenious one-dimensional zirconium phosphonate with efficient strontium exchange capability and moderate proton
Jiarong Zhang1, Lanhua Chen2, Daxiang Gui2
1State Key Laboratory Breeding Base of Nuclear Resources and Environmental, East China Institute of Technology, Nanchang, 330013, China. guolinhuang@sina.com and State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China. diwujuan@suda.edu.cn shuaowang@suda.edu.cn.
Abstract:
A new 1-D zirconium phosphonate [(CH3)2NH2]2[Zr(CH2(HPO3)(PO3))2] (SZ-5) was synthesized via a solvothermal reaction and its single crystal structure was elucidated. SZ-5 exhibits efficient strontium exchange capability with high uptake capacity and selectivity, as further demonstrated by the radioactive Sr-90 removal from a real contaminated seawater sample with an extremely high ionic strength. In addition, the measured proton conductivity at 90 °C and 90% relative humidity (RH) is 5.65 × 10-4 S cm-1. The efficient ion-exchange ability and the moderate proton conductivity suggest the potential applications of SZ-5 in fuel cells or in the remediation of contaminated water.
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