Facile Synthesis of Nanoporous Hydroquinone/Catechol Formaldehyde Resins and their Highly Selective, Efficient and Regenerate Reactive Adsorption for Gold Ions

摘要

We present a new type of nanoporous hydroquinone/catechol formaldehyde resin synthesized by a one-pot route, with a surface area of up to 1 112 m2 · g−1. The resins show highly efficient reactive adsorption for silver/gold (silver adsorbance up to 2.43 g · g−1) and excellent selectivity for gold (K_d is as high as 1 914 090 mL · g−1). The first-used resins can be regenerated with NaHSO₃, and the gold capacities of the recycled PCFR and PHFR reach 44 and 78% of their first loading capacities, respectively.