Although the demand of ^(10)B separation has arisen in the 1930s,^(10)B/^(11)B are among the most difficult isotopes to separate due to the extremely similar relative atomic mass.Herein,we report an efficient separati...Although the demand of ^(10)B separation has arisen in the 1930s,^(10)B/^(11)B are among the most difficult isotopes to separate due to the extremely similar relative atomic mass.Herein,we report an efficient separation of ^(10)B isotopologue by engineering amino-galloyl synergistic materials via a selective adsorption and isotope exchange reaction,achieving a record-high single-stage separation factor of 1.048 with ^(10)B abundance up to 21.42%.^(11)B MAS NMR results and DFT calculations reveal that the galloyl groups exhibit inherent high affinity for B(OH)4-,forming tetrahedral sp^(3) B-galloyl complexes.The relatively higher ^(10)B–O bond energy of ^(10)B-galloyl complexes facilitates the isotope exchange between11B in B-galloyl complexes and ^(10)B in B(OH)_(3).Flowthrough dynamic separation in fixed-bed demonstrates the feasibility and potential of large-scale deployment of this method in real-world,suggesting a promising avenue for the exploitation of more efficient enrichment of ^(10)B for the sustainable nuclear energy and biomedical research.展开更多
采用循环伏安法分析了硼氢化钠(Na BH_4)在金(Au)电极上的电化学氧化还原行为,在-0.473 V电位处发现了比较明晰且稳定的BH_4^-特征氧化峰,可作为BH_4^-存在的定性判据。通过线性伏安扫描,对浓度为1.0×10^(-4)~9.0×10^(-3)mol/...采用循环伏安法分析了硼氢化钠(Na BH_4)在金(Au)电极上的电化学氧化还原行为,在-0.473 V电位处发现了比较明晰且稳定的BH_4^-特征氧化峰,可作为BH_4^-存在的定性判据。通过线性伏安扫描,对浓度为1.0×10^(-4)~9.0×10^(-3)mol/L的Na BH_4碱性溶液进行了测定,发现Na BH_4特征氧化峰的峰值电流与其浓度呈良好的线性关系,相关系数为0.998 4。利用线性伏安法分别对5.0×10^(-4)mol/L Na BH_4+0.10 mol/L Na OH溶液和5.0×10^(-3)mol/L Na BH_4+0.10 mol/L Na OH溶液平行测定5次,所得结果的平均相对误差分别为3.18%和1.63%,相对标准偏差分别为2.38%和1.88%。展开更多
基金supported by the National Natural Science Foundation of China(Nos.22108181,22178233)the Fund of Science and Technology on Reactor Fuel and Materials Laboratory(No.6142A06190601)+6 种基金the National Excellent Young Scientists Fund(No.00308054A1045)the National Key R&D Program of China(No.2022YFA0912800)the Talents Program of Sichuan ProvinceDouble First Class University Plan of Sichuan Universitythe State Key Laboratory of Polymer Materials Engineering(No.sklpme 2020–03–01)the Tianfu Emei Program of Sichuan Province(No.2022EC02–00073-CG)Ministry of Education Key Laboratory of Leather Chemistry and Engineering(Sichuan University)。
文摘Although the demand of ^(10)B separation has arisen in the 1930s,^(10)B/^(11)B are among the most difficult isotopes to separate due to the extremely similar relative atomic mass.Herein,we report an efficient separation of ^(10)B isotopologue by engineering amino-galloyl synergistic materials via a selective adsorption and isotope exchange reaction,achieving a record-high single-stage separation factor of 1.048 with ^(10)B abundance up to 21.42%.^(11)B MAS NMR results and DFT calculations reveal that the galloyl groups exhibit inherent high affinity for B(OH)4-,forming tetrahedral sp^(3) B-galloyl complexes.The relatively higher ^(10)B–O bond energy of ^(10)B-galloyl complexes facilitates the isotope exchange between11B in B-galloyl complexes and ^(10)B in B(OH)_(3).Flowthrough dynamic separation in fixed-bed demonstrates the feasibility and potential of large-scale deployment of this method in real-world,suggesting a promising avenue for the exploitation of more efficient enrichment of ^(10)B for the sustainable nuclear energy and biomedical research.
文摘采用循环伏安法分析了硼氢化钠(Na BH_4)在金(Au)电极上的电化学氧化还原行为,在-0.473 V电位处发现了比较明晰且稳定的BH_4^-特征氧化峰,可作为BH_4^-存在的定性判据。通过线性伏安扫描,对浓度为1.0×10^(-4)~9.0×10^(-3)mol/L的Na BH_4碱性溶液进行了测定,发现Na BH_4特征氧化峰的峰值电流与其浓度呈良好的线性关系,相关系数为0.998 4。利用线性伏安法分别对5.0×10^(-4)mol/L Na BH_4+0.10 mol/L Na OH溶液和5.0×10^(-3)mol/L Na BH_4+0.10 mol/L Na OH溶液平行测定5次,所得结果的平均相对误差分别为3.18%和1.63%,相对标准偏差分别为2.38%和1.88%。
