SrF_(2):Tb^(3+)的水热合成及其对Fe^(3+)离子检测研究

Hydrothermal Synthesis of SrF_(2):Tb^(3+)for Selective Detection of Fe 3+Ions

采用水热法一步合成了一系列SrF_(2):Tb^(3+)荧光粉,对其物相结构以及发光性质进行了表征。发现在Fe^(3+)的存在下Tb^(3+)的荧光会明显猝灭,因此SrF_(2):Tb^(3+)可作为荧光探针检测Fe^(3+)离子。通过检测1×10-5~6×10-5mol/L浓度范围的Fe^(3+)溶液,确定了荧光探针荧光强度与Fe^(3+)浓度之间的线性关系,计算得到了检出限为1.73×10-7mol/L。此外,SrF_(2):Tb^(3+)荧光探针在检测Fe^(3+)时具有较好的选择性与抗干扰性,最后对实际水样进行了检测,测得湖水与自来水中Fe^(3+)的浓度分别为9.15μmol/L和11.80μmol/L。

A series of SrF_(2):Tb^(3+)phosphors were synthesized in one step by hydrothermal method,and their physical structure and luminescence properties were characterized.The fluorescence of Tb^(3+)in the presence of Fe 3+was found to be significantly burst,and thus SrF_(2):Tb^(3+)could be used as a fluorescent probe for the detection of Fe 3+.The linear relationship between the fluorescence intensity of the fluorescent probe and Fe 3+concentration was determined in the concentration range of 1×10-5~6×10-5 mol/L,and the detection limit was calculated to be 1.73×10-7 mol/L.In addition,the fluorescent probe was found to have good selectivity and interference resistance in the detection of Fe 3+.Finally,the detection was carried out on actual water samples,and the concentrations of Fe 3+in the lake water and tap water were measured to be 9.15μmol/L and 11.80μmol/L,respectively.