As an important precious metal, the recovery of gold can not only relieve the shortage of resources, but also has a high economic value. In this work, a novel silsesquioxane-based fluorescent porous hybrid polymer (PTSC) was prepared successfully by Heck coupling reaction of octavinylsilsesquioxane with a dibromated distyry-bithiophenes containing cyano groups. The structure of PTSC was fully investigated, which featured a high surface area of 455 m g, wide light adsorption band, narrow optical band gap (1.73 eV) and excellent semiconductor performance. As Au(III) adsorbent, the adsorption capacity of PTSC reached 3080 mg g under light irradiation for 4 h at pH = 5, and the purity of the recovered gold in e-waste could reach 23.92 K. The adsorption mechanism showed that photoelectrons produced by PTSC could reduce all Au(III) adsorbed to Au(I) and Au(0). Moreover, a hybrid aerogel device based on PTSC and chitosan was fabricated to realize the enrichment and recovery of gold ions in wastewater. Besides, PTSC could also act as a probe to detect Au(III) with high selectivity and specificity. This study provided a new strategy for efficient recovery and detection of Au(III).

中文翻译：

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荧光多孔杂化倍半硅氧烷基半导体聚合物，用于阳光驱动的高效率和选择性金回收


黄金作为重要的贵金属，回收不仅可以缓解资源短缺，而且具有很高的经济价值。在这项工作中，通过八乙烯基倍半硅氧烷与含氰基的二溴化二苯乙烯基联噻吩的Heck偶联反应，成功制备了一种新型的基于倍半硅氧烷的荧光多孔杂化聚合物（PTSC）。 PTSC的结构得到了充分研究，具有455m g-1的高比表面积、宽光吸收带、窄光学带隙（1.73eV）和优异的半导体性能。作为Au(III)吸附剂，在pH=5条件下光照4h，PTSC的吸附容量达到3080mgg，回收的电子垃圾中金的纯度可达23.92K。吸附机理表明产生了光电子。 PTSC 可以减少所有吸附到 Au(I) 和 Au(0) 上的 Au(III)。此外，还制备了基于PTSC和壳聚糖的混合气凝胶装置，实现了废水中金离子的富集和回收。此外，PTSC还可以作为检测Au(III)的探针，具有高选择性和特异性。该研究为Au(III)的高效回收和检测提供了新策略。