Orange Peel Derived‐Nitrogen and Sulfur Co‐doped Carbon Dots: a Nano‐booster for Enhancing ORR Electrocatalytic Performance of 3D Graphene Networks

Abstract

Herein, nitrogen, sulfur co‐doped carbon dots (N,S−CDs) have been synthesized by a cost‐natural fabrication method using waste orange‐peel as a natural‐carbon‐precursor. N,S−CDs have been hydrothermally anchored to the three‐dimensional‐graphene‐networks (3D−GNs) to boost the electrocatalytic activity by a defective surface effect. Due to the synergistic utilization of heteroatoms, and effective mass‐transfer and improved transport kinetics resulting from interconnected 3D‐architecture, N,S−CDs anchored 3D−GNs (N,S−CDs@3D−GNs) grant superior oxygen‐reduction‐reaction (ORR) activity. N,S−CDs@3D−GNs exhibit a dominant four‐electron pathway (n=3.89) for ORR in alkaline media besides superior methanol tolerance and robust stability. This work opens a door for converting low‐value agricultural wastes into value‐added materials for utilizing in energy application.

Doxorubicin Anticancer Drug Monitoring by ds-DNA-Based Electrochemical Biosensor in Clinical Samples

“…Nanotechnology is now considered to be an important part of engineering processes in the world [ 37 , 38 , 39 , 40 , 41 , 42 ]. The unique properties of nanomaterials have led to their widespread application in industry and the design of engineering systems and have led to significant changes in various scientific fields [ 43 , 44 , 45 , 46 , 47 , 48 , 49 ].…”

Evaluation of Peroxidase in Herbal Medicines Based on an Electrochemical Sensor

“…The use of peroxidase to assist in species identification is a relatively simple and effective. Studies have shown that peroxidases are involved in the physiological responses of plants to disease, insect, salt, and drought resistance as well as resistance to biotic stresses ( Jamali et al, 2014 ; Baghizadeh et al, 2015 ; Karaman, 2021 ; Karaman et al, 2021 ).…”

Label-free Electrochemical Impedance Spectroscopy Aptasensor for Ultrasensitive Detection of Lung Cancer Biomarker Carcinoembryonic Antigen

“…This led to the use of tumor markers Li et al (2020a), Duan et al (2021), Li et al (2021), Wang et al (2021), which are chemical-based substances that reflect the presence of tumors. They are not found in normal adult tissues but only in embryonic tissues Karimi-Maleh et al (2021c), Karaman (2021), Karaman et al (2021), or are present in tumor tissues at levels that greatly exceed those found in normal tissues (Li et al, 2020b;Vajhadin et al, 2020). Their presence or quantitative changes can reveal the nature of tumors, lend to the understanding of tumor histogenesis, cell differentiation and cell function, which can provide assistance in tumor diagnosis, classification and treatment guidance.…”