We describe a facile one-pot synthesis of porous covalent sulfide-bridged polytriazine nanospheres (NOP-28), which can be employed as highly efficient sorbents and at the same time act as selective sensitive sensors towards trace Hg²⁺. The as-made nanospheres were integrated with abundant thioether moieties, which are stable even under strong acid and base conditions, and they exhibit extremely high adsorption capacities (up to 658 mg g⁻¹) from environmental sources such as water. Over 99.9% of the mercury was removed even at an initial concentration as low as 1.0 ppm despite their moderate BET surface areas. On the other hand, the π-conjugated NOP-28 features a strong photoluminescence that is distinctly quenched after trace Hg uptake. An excellent sensing performance is achieved in terms of high sensitivity (detection limit 12.0 ppb), excellent selectivity and real-time response for Hg²⁺. This study provides a new pathway for both removing and sensing toxic metals for the remediation of contaminated spaces, and suggests the great versatility of nanoporous organic polymers targeting various environmental challenges.

中文翻译：

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富硫共价三嗪聚合物纳米球，用于环境汞的去除和检测†

我们描述了多孔共价硫化物桥联的聚三嗪纳米球（NOP-28）的一种简便的一锅合成方法，该方法可以用作高效吸附剂，同时对痕量Hg ²⁺起到选择性敏感传感器的作用。制成的纳米球集成了丰富的硫醚部分，即使在强酸和强碱条件下也很稳定，并且具有极高的吸附能力（高达658 mg g ^-1），例如水。尽管BET表面积适中，但即使最初浓度低至1.0 ppm，也能去除超过99.9％的汞。另一方面，π-共轭NOP-28具有很强的光致发光特性，在吸收痕量的Hg后会明显淬灭。在高灵敏度（检测限12.0 ppb），出色的选择性和对Hg ²⁺的实时响应方面，可实现出色的感测性能。这项研究为去除和感测有毒金属以修复污染空间提供了一条新途径，并提出了纳米多孔有机聚合物的强大多功能性，可应对各种环境挑战。