Design of Graphene Nanoplatelet/Graphitic Carbon Nitride Heterojunctions by Vacuum Tube with Enhanced Photocatalytic and Electrochemical Response

Abstract

The vacuum tube method has been used for the construction of nondestructive and physically stable graphitic carbon nitride/graphene nanoplatelet composites and their photocatalytic behavior studied by measuring different photoactivities, such as photocurrent, photoluminescence, and the photodegradation of tetracycline hydrochloride under visible‐light irradiation. The formation of a heterojunction was confirmed by XRD, TEM, SEM, FTIR, XPS, and Raman spectroscopy. The results of this research indicate that the vacuum tube method is a facile, economic, and environmentally friendly approach to the preparation of composites. An ion‐trapping experiment indicated that, under visible light, the most effective photocatalyst generated the superoxide radical (O2·–) and holes (h+) to achieve the complete degradation of tetracycline hydrochloride.

Pt2CeO2 Heterojunction Supported on Multiwalled Carbon Nanotubes for Robust Electrocatalytic Oxidation of Methanol

“…The red phosphorus/graphitic carbon nitride possess type-I heterojunction with enhanced catalytic behavior [ 26 ]. Tahir Muhmood et al used the vacuum tube method to construct nondestructive and physically stable graphitic carbon nitride/graphene nanoplatelet composites, which achieved the complete degradation of tetracycline hydrochloride [ 27 ]. It can be seen that the construction of heterojunction catalyst has the potential to improve the catalytic performance.…”

An novel catalyst based on Ni@C3N4 heterojunction for efficient reduction of Cr(VI)

“…To improve these deficiencies, researchers have regulated g-C 3 N 4 to enhance the photocatalytic properties [12,13]. For instance, Xia group reported graphitic carbon nitride/graphene nanoplatelets composites was prepared via a novel vacuum tube method to achieve a complete degradation of tetracycline hydrochloride under visible light irradiation due to the larger surface area and higher charge separation ability [14]. The spherical graphite carbon nitride was successfully prepared using a solvent thermal method by Muhmood et al which showed a wider visible light absorption and lower photoinduced charge carrier recombination than bulk g-C 3 N 4 , Tetracycline hydrochloride can be completely degraded within 110 min under the catalysis of the improved spherical C 3 N 4 [15].…”

High-Throughput Preparation of Uncontaminated Graphene-Oxide Aqueous Dispersions with Antioxidant Properties by Semi-Automated Diffusion Dialysis

“…E.g., graphene nanoplatelets bridge between two semiconductors (AgBr and graphitic carbon nitride) boost photoelectrochemical performance [ 18 ]. Effective photocatalysts generated the superoxide radical (O 2 − ) and holes (h + ) were used to achieve the complete degradation of tetracycline hydrochloride [ 19 ]. Graphene oxide-TiO 2 composite was used for the degradation and mineralization of two hazardous pollutants—diphenhydramine pharmaceutical and methyl orange azo dye—under both near-UV/Vis and visible light irradiation [ 20 ].…”