Porous Functionalized Covalent-Triazine Frameworks for Enhanced Adsorption Toward Polysulfides in Li-S Batteries and Organic Dyes

Abstract

The incorporation of functional building blocks to construct functionalized and highly porous covalent triazine frameworks (CTFs) is essential to the emerging adsorptive-involved field. Herein, a series of amide functionalized CTFs (CTF-PO71) have been synthesized using a bottom-up strategy in which pigment PO71 with an amide group is employed as a monomer under ionothermal conditions with ZnCl2 as the solvent and catalyst. The pore structure can be controlled by the amount of ZnCl2 to monomer ratio. Benefitting from the highly porous structure and amide functionalities, CTF-PO71, as a sulfur cathode host, simultaneously demonstrates physical confinement and chemical anchoring of sulfur species, thus leading to superior capacity, cycling stability, and rate capability in comparison to unfunctionalized CTF. Meanwhile, as an adsorbent of organic dye molecules, CTF-PO71 was demonstrated to exhibit strong chemical interactions with dye molecules, facilitating adsorption kinetics and thereby promoting the adsorption rate and capacity. Furthermore, the dynamic adsorption experiments of organic dyes from solutions showed selectivity/priority of CTF-PO71s for specific dye molecules.

Donor–Acceptor Conjugated Microporous Polymer toward Enhanced Redox Kinetics in Lithium–Sulfur Batteries

“…As presented in Figure g, the high-resolution C 1s spectrum of CMP-B@CNT gives three peaks at 288.4 eV from CN, 285.7 eV from C–N and 284.8 eV from C–C/CC, respectively . The N 1s spectrum in Figure h shows two peaks with binding energies of 399.1 and 400.4 eV, which were attributed to the C–NC and C–N–H fragments . For the CMP-T@CNT, the C 1s spectrum was resolved into CN (288.3 eV), C–N (286.5 eV) and C–C/CC (284.8 eV), respectively (Figure S8a).…”

“…43 The N 1s spectrum in Figure 2h shows two peaks with binding energies of 399.1 and 400.4 eV, which were attributed to the C−N�C and C−N−H fragments. 44 For the CMP-T@CNT, the C 1s spectrum was resolved into C�N (288.3 eV), C−N (286.5 eV) and C−C/ C�C (284.8 eV), respectively (Figure S8a). Figure S8b displays two peaks in the N 1s spectrum, including 399.0 eV from C−N�C and 400.4 eV from C−N−H.…”

A Triazine Based Porous Organic Polymer as an Efficient Hydrogen‐Bond Donor and Acceptor Cooperative Heterogeneous Catalyst for the Synthesis of 2‐Substituted Benzimidazoles

“…In deconvoluted C 1s spectrum, the main contributions with binding energy at 284.6 eV can be due to C=C and 286.9 eV can be assigned to −C=N−C− from triazine rings (Figure. 3b) [26] . In N 1s, the deconvoluted spectra exhibit two substantial peaks with binding energies at 398.8 eV and 400.6 eV attributed to triazine N and the free amino groups (C−N−H), respectively (Figure 3c).…”

Boron Carbon Nitride-Assisted Electro-Functionalization of Screen-Printed Electrode for Tryptophan Sensing

“…The deconvoluted C 1s spectra of bare SPE and BCN SPE show four peaks (Figure e,f) corresponding to the carbon-based working electrode of SPEs. Specifically, the peak at 284.58 eV is attributed to the CC bond, CH–CCl at 285.98 eV, C–N bond at 283.88 eV, and Ag 2 CO 3 at 288.48 eV all arising from the graphite ink with added binders and organic solvents used for printing the SPE. ,, However, compared to the unmodified SPE, a significant increase in C–N functionalities on the BCN-SPE is evident from the considerably enhanced peak intensity at 283.88 eV. The two additional peaks at 287.78 eV and 292.48 eV in the C 1s spectra of BCN-SPE further confirm the presence of sp 2 hybridized C/C–N groups of the triazine rings which is one of the building blocks of BCN.…”