One-Step Pyrolytic Synthesis of Nitrogen and Sulfur Dual-Doped Porous Carbon with High Catalytic Activity and Good Accessibility to Small Biomolecules

Abstract

As one of promising catalysts that contain high density of active sites, N doped carbons have been extensively researched, while the reports for N, S dual-doped carbon materials are far less exhaustive. Herein, devoid of activation process and template, N, S dual-doped porous carbon (N-S-PC) was prepared for the first time via one-step pyrolysis of sodium citrate and cysteine. Possessing unique porous structure and large pore volume as well as good accessibility, N-S-PC demonstrates significantly improved electrocatalytic activity toward oxidation of ascorbic acid (AA), dopamine (DA), and uric acid (UA). In the coexisting system, the peak potential separation between AA and DA is up to 251 mV, which is much larger than for most of the other carbons. On the basis of large potential separation and high current response, selective and sensitive simultaneous determination of AA, DA, and UA was successfully accomplished by differential pulse voltammetry, displaying a linear response from 50 to 2000 μM, from 0.1 to 50 μM, and from 0.1 to 50 μM with a detection limit (S/N = 3) of 0.78, 0.02, and 0.06 μM. This work highlights the importance of N, S dual doping and hierarchical porous carbons for efficient catalysis.

Facile Synthesis of Nitrogen and Sulfur Dual-doped Hierarchical Micro/mesoporous Carbon Foams as Efficient Metal-free Electrocatalysts for Oxygen Reduction Reaction

“…The high-resolution spectrum of C1s in NS-MCs (Fig. 4B) can be deconvoluted into several single peaks, corresponding to C-C (284.6 eV, C1), C-O,C-N&C-S (285.1 eV, C2) and O=C&-NH 2 (288.8 eV, C3) further confirming that N and S heteroatoms have been successfully doped into the carbon foams [36,37]. The N1s peaks in the XPS spectra of NS-MC composites and PANi were fitted into three peaks: pyridinic N (N1), pyrrolic N (N2) and graphitic N (N3) at the binding energies of around 398.0, 399.8 and 401.3 eV, respectively (Fig.…”

A high performance sulfur-doped disordered carbon anode for sodium ion batteries

“…The morphologies of as-prepared DC and DC-S were characterized by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), as shown in the thiophene-S, while the weak peak at 168.4 eV is corresponding to C-SO x -C (x=2-4) groups, [34][35][36] confirming that sulfur has been successfully incorporated into the disordered carbon. Nitrogen adsorption-desorption isotherm analysis was further characterized to evaluate the surface area and pore structure of asobtained products.…”

Heteroatom‐Containing Porous Carbons Derived from Ionic Liquid‐Doped Alkali Organic Salts for Supercapacitors

“…For nitrogen and sulfur atoms co‐doped C‐BMTh‐salt‐1.0, the surface sulfur functional groups was revealed by S2p spectra. The binding energies were around 164.0, 165.2, and 168.8 eV, respectively . The former two peaks represent the –C–S–C– covalent bond of thiophene‐S.…”

“…Recently, extensive efforts have been made to prepare the heteroatoms‐doped CMs: using post‐treatment processes (such as using ammonia gas, sulfur powder, and red phosphorus), or carbonizing the heteroatom‐rich carbon precursors (including biomass‐derived products, synthetic polymers, and alkali organic salts) . However, post‐treatment processes were relatively time consuming, and direct carbonization of heteroatom‐rich carbon precursors usually leads to low content of heteroatom, especially for the preparation of graphitic carbons at high temperatures . Furthermore, using extra strong chemical activation agents or templates was arduous and highly cost.…”