Biomass‐derived Nitrogen and Phosphorus Co‐doped Hierarchical Micro/mesoporous Carbon Materials for High‐performance Non‐enzymatic H₂O₂ Sensing

Abstract

Nitrogen and phosphorus co‐doped hierarchical micro/mesoporous carbon (N,P‐MMC) was prepared by simple thermal treatment of freeze‐dried okra in the absence of any other additives. The 0.96 wt % of N and 1.47 wt % of P were simultaneously introduced into the graphitic framework of N,P‐MMC, which also possesses hierarchical porous structure with mesopores centered at 3.6 nm and micropores centered at 0.79 nm. Most importantly, N,P‐MMC carbon exhibits excellent catalytic activity for electrocatalytic reduction of H2O2, resulting in a new strategy to construct non‐enzymatic H2O2 sensor. The N,P‐MMC‐based H2O2 sensor displays two linear detection range about 0.1 mM–10 mM (R2=0.9993) and 20 mM–200 mM (R2=0.9989), respectively. The detection limit is estimated to be 6.8 μM at a signal‐to‐noise ratio of 3. These findings provide insights into synthesizing functional heteroatoms doped porous carbon materials for biosensing applications.

An Electrochemical Sensor for Sunset Yellow Detection Based on Cu@Cu2O-BNPC Formed by Modified Porous Carbon

“…Liu et al introduced nitrogen and phosphorus into the carbon lattice of porous carbon materials. The synergistic effect between the N atom and the P atom in the carbon matrix can significantly promote the sensor performances in conductivity and activity . The above examples exhibited that heteroatoms can enhance the sensing properties of carbon by modifying carbon materials directly.…”

“…The synergistic effect between the N atom and the P atom in the carbon matrix can significantly promote the sensor performances in conductivity and activity. 26 The above examples exhibited that heteroatoms can enhance the sensing properties of carbon by modifying carbon materials directly. Among various kinds of heteroatom-doped composites, electron-deficient B and electron-rich N-doped porous carbons have a tremendous future in electrical sensors.…”

Review—Biomass Derived Carbon Materials for Electrochemical Sensors

“…Mesopores centred at 3.6nm and micropores at 0.79 nm. 88 This porous surface area provides platform for electrochemical sensing. N,P-MMC modified GCE (N,P-MMC/GCE) was used for detection of H 2 O 2 in PBS at pH 7.…”