A Bioinspired Photocatalysis and Electrochemiluminescence Scaffold for Simultaneous Degradation and In Situ Evaluation

摘要

pageabstract2tpageNanostructured scaffolds that optimize self-responsive ability, visiblelight harvesting, redox center distribution, and species shuttling porosityhave been mimicked much less often, especially using organic crystallinesubstances. Inspired by a natural photosynthetic thylakoid membrane, asynthetic strategy with general applicability to construct a hollow organiccrystalline nanosphere by orderly hybridizing imine-linked covalent organicframeworks (COFs) with polymeric hollow g-C_3N_4 nanosphere is proposed.As a proof-of-concept application, in a homemade microreaction cell, thesehollow organic nanospheres are shown to function as robust scaffolds,heterojunction shells, and light-harvesting antennas, enabling excellentvisible-light-driven photocatalysis for the almost complete degradation oftetracycline, a gravely residual antibiotic worldwide. Significantly, a new electrochemiluminescence(ECL) technology derived from biomimetic self-responsivenessis developed for in situ evaluation of the photodegradation process,accessing kinetics and other relevant parameters at an extremely lowabundancetarget, which remains challenging to date, albeit highly desirable.This work provides a general synthetic strategy for obtaining COFs-derivedhollow crystalline organic nanospheres for promising photocatalysis applicationsand offers a new perspective on the development of ECL technology forsimultaneous analysis and treatment of actual sewage.