Cyanided Covalent Triazine Frameworks with Enhanced Adsorption Capability Toward Chloranil

Porous polymer (pyrrolopyrrole) was successfully prepared via domino-ring-formation reaction. The chemical-physical properties of cyanided covalent triazine frameworks (CTF-CN) were characteriazed by fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), specific surface area analyzer (BET) and thermogravimetric analysis (TGA), respectively. The experimental results of adsorption of chloranil (TCBQ) in aqueous solution indicated that CTF-CN exhibited distinctive adsorption capacity toward TCBQ owing to its large specific surface area. Specifically, the adsorption equilibrium of as-prepared polymer was executed within 5 h and the calculated adsorption capacity was 499.76 mg/g. Furthermore, the adsorption kinetics could be well defined with the linear pseudo-second-order model, which implies that the chemical interaction are relative important in the course of TCBQ removal. Finally, the current studies verify that CTF-CN has unique rigid and nano-porous framework structure, which can be employed for the treatment of a series of harmful aromatic substances.