AbstractFluorescent boron nitride quantum dots (BNQDs) were synthesized from boric acid and ammonium hydroxide by a hydrothermal method. Under 305 nm excitation, the BNQDs emit blue fluorescence with a peak at 400 nm and a quantum yield of 32%. The BNQDs are highly photostable and resistant to ionic strength. A rapid fluorometric method for the determination of Ni2+ was developed using the heavy-metal free BNQDs via photo-induced electron transfer. Under optimal conditions, fluorescence varies linearly with the logarithm of the Ni2+ concentration in the range from 0.1 to 100 μmol·L−1. The detection limit is 0.1 μmol·L−1. Graphical abstractFluorescent boron nitride quantum dots (BNQDs) were synthesized from boric acid and ammonium hydroxide by a hydrothermal method. Their fluorescence is quenched by Ni(II) via photo-induced electron transfer, and this effect is exploited in a fluorometric assay for Ni(II).

中文翻译：

---

通过淬灭氮化硼量子点的荧光测定镍 (II)

摘要 以硼酸和氢氧化铵为原料，采用水热法合成了荧光氮化硼量子点（BNQDs）。在 305 nm 激发下，BNQD 发出蓝色荧光，峰值在 400 nm，量子产率为 32%。BNQD 具有高度的光稳定性和抗离子强度。通过光诱导电子转移，使用不含重金属的 BNQD 开发了一种用于测定 Ni2+ 的快速荧光法。在最佳条件下，荧光在 0.1 到 100 μmol·L-1 范围内随 Ni2+ 浓度的对数线性变化。检测限为0.1 μmol·L-1。图形摘要以硼酸和氢氧化铵为原料，采用水热法合成了荧光氮化硼量子点（BNQDs）。它们的荧光被 Ni(II) 通过光诱导电子转移淬灭，