Gang Deng, Zishao Wang, Jiahui Liu, Xinyi Chai, Tianyuan Yu, Xi Zhang, Jin-Zhou Liu, Yanxiong Liu, Xinrong Jiang, Siyuan Yang, Ziyan Zhuang, Jian Ling, Rong Sheng Li
A reductive nanospiked covalent organic framework (ETTA-TDA-COF) was developed for efficient gold recovery (828.08 mg g-1) and tri-modal sensing. Rapid in situ reduction of Au3+ to Au0 triggers changes in color, surface-enhanced Raman scattering (SERS), and Rayleigh scattering, showing excellent linearity with gold concentrations.