A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phospho...A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phosphorescence(RTP)properties,was prepared by doping 2,6-naphthalic acid(P)into matrix1at a low con-centration.P@1emitted a green RTP that was visible to the naked eye and lasted for approximately 2 s.P@1exhib-ited selective phosphorescence enhancement response towards Pb^(2+),with a detection limit of 2.52μmol·L^(-1).Themain detection mechanism is the Pb—O coordination-induced phosphorescence enhancement in the system.Inter-estingly,P@1also functioned as a dual-channel probe for the rapid detection of Fe^(3+)ions through fluorescencequenching with a detection limit of 0.038μmol·L^(-1).The recognition mechanism may be attributed to the competi-tive energy absorption betweenP@1and Fe^(3+)ions.CCDC:2388502,1.展开更多
研究了青岛高岭土制备地聚物的最佳条件和地聚物的水化过程。重点考察了水灰比、碱激发剂掺量、水玻璃模数等因素对地聚物抗压强度的影响。结果表明：以高岭土煅烧得到的偏高岭土为原料制备地聚物，当水灰比为0.35、碱激发剂掺量为21％...研究了青岛高岭土制备地聚物的最佳条件和地聚物的水化过程。重点考察了水灰比、碱激发剂掺量、水玻璃模数等因素对地聚物抗压强度的影响。结果表明：以高岭土煅烧得到的偏高岭土为原料制备地聚物，当水灰比为0.35、碱激发剂掺量为21％、水玻璃模数为1.4时，地聚物具有较高的强度。由此制备的地聚物试块在50℃下用保鲜膜包裹养护9 d 再自然养护19 d，其抗压强度为71 MPa。通过XRD、SEM对地聚物的水化过程进行了研究，揭示了地聚物不同水化时间的微观结构变化，结果表明：地聚物在水化过程中，先脱水缩聚生成小颗粒地聚物前驱体，然后进一步生成相对较大的分子，最后连接成网状结构，形成致密结构；其水化产物主要是网状无定型的硅铝凝胶，对应的XRD衍射区域为20°～30°。展开更多
文摘A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phosphorescence(RTP)properties,was prepared by doping 2,6-naphthalic acid(P)into matrix1at a low con-centration.P@1emitted a green RTP that was visible to the naked eye and lasted for approximately 2 s.P@1exhib-ited selective phosphorescence enhancement response towards Pb^(2+),with a detection limit of 2.52μmol·L^(-1).Themain detection mechanism is the Pb—O coordination-induced phosphorescence enhancement in the system.Inter-estingly,P@1also functioned as a dual-channel probe for the rapid detection of Fe^(3+)ions through fluorescencequenching with a detection limit of 0.038μmol·L^(-1).The recognition mechanism may be attributed to the competi-tive energy absorption betweenP@1and Fe^(3+)ions.CCDC:2388502,1.
文摘研究了青岛高岭土制备地聚物的最佳条件和地聚物的水化过程。重点考察了水灰比、碱激发剂掺量、水玻璃模数等因素对地聚物抗压强度的影响。结果表明：以高岭土煅烧得到的偏高岭土为原料制备地聚物，当水灰比为0.35、碱激发剂掺量为21％、水玻璃模数为1.4时，地聚物具有较高的强度。由此制备的地聚物试块在50℃下用保鲜膜包裹养护9 d 再自然养护19 d，其抗压强度为71 MPa。通过XRD、SEM对地聚物的水化过程进行了研究，揭示了地聚物不同水化时间的微观结构变化，结果表明：地聚物在水化过程中，先脱水缩聚生成小颗粒地聚物前驱体，然后进一步生成相对较大的分子，最后连接成网状结构，形成致密结构；其水化产物主要是网状无定型的硅铝凝胶，对应的XRD衍射区域为20°～30°。
