A Novel Metal-Free Polymer-Based POPD/g-C₃ N₄ Photocatalyst with Enhanced Charge Carrier Separation for the Degradation of Tetracycline Hydrochloride

Abstract

Development of low‐cost, highly‐efficient and metal‐free photocatalyst has been attracted great attentions recently owing to its unique advantages and wide application. Here, the novel metal‐free Poly‐o‐phenylenediamine (POPD)/g‐C3N4 photocatalyst is firstly synthetized via suspension polymerization in the existence of g‐C3N4. Such POPD/g‐C3N4 photocatalyst is constructed through growth of highly dispersed conductive polymer nanoparticles on the g‐C3N4 surfaces. The photoluminescent spectra and photoelectrochemical measurement confirm that the introduction of POPD nanoparticles in g‐C3N4 system can effectively separate charge carrier and suppress their recombination. As expected, the as‐prepared POPD/g‐C3N4 photocatalyst exhibits obviously enhanced photocatalytic degradation performance of tetracycline hydrochloride than that of pure g‐C3N4 under visible light irradiation, which is due to the synergistic effect of POPD and g‐C3N4. At last, the possible photocatalytic reaction mechanism and the transfer and separation process of photo‐generated charge carriers in the POPD/g‐C3N4 system are proposed. This work provides a new insight into the construction of other metal‐free polymer‐based photocatalyst for water purification.

Enhance Solar‐Light‐Driven Photocatalytic Degradation of Norfloxacin Aqueous Solution by RGO‐Based CdxZn1‐xS Alloy Composite with Band‐Gap Tuneability

“…Hence the development of an efficient, quick to remove fluoroquinolone from wastewater is very important. Different chemical, physical and biological techniques have been adopted for the effective removal of antibiotics from aqueous medium . Among these techniques, the photocatalytic degradation process is one of the low cost and most effectual environmental friendly approaches for the efficient removal of aqueous antibiotics.…”

Graphitic Carbon Nitride-Wrapped Metal-free PoPD-Based Biosensor for Xanthine Detection

“…The result shows that the addition of PoPD has a favorable impact on the separation and transfer of photogenerated charge carriers, which is compatible with the PoPD@g-C 3 N 4 system. 8 Electrochemical electrode reactions have been studied using electron transfer kinetics based on obtained R ct values. Equations 1 and 2 have been used to compute the apparent electron transfer rate constant (K app ) and exchange current per geometric unit area (i o ) for g-C 3 N 4 /ITO electrodes and PoPD@g-C 3 N 4 /ITO electrodes.…”

“…PoPD as an interference-rejecting layer offers good selectivity and specificity to the various biomolecules present in biological fluids, which might affect the selectivity of the biosensor . Thus, integrating P o PD with g-C 3 N 4 has been considered as an ideal method for increasing electrochemical performance of g-C 3 N 4 nanosheets …”

“…7 In this context, pairing g-C 3 N 4 nanosheets with conducting polymers such as poly-o-phenylenediamine (PoPD) is a great way to increase the electrochemical activity of g-C 3 N 4 . 8 PoPD is a derivative of polyaniline, having a quinoxaline or 2,3-diaminophenazine repeating unit, which has the advantages of variable conductivity, robust electroactivity, and good optical activity. 9 Its low cost, high stability, and environmental friendliness are crucial for potential applications.…”

Recent Advances in g‐C3N4‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

“…Chen et al. [ 183 ] chose poly‐ o ‐phenylenediamine (POPD), a derivative of polyaniline, as the ligand, which contains 2,3‐diaminophenazine repeat units and has excellent photoelectric properties and high stability. A metal‐free POPD/g‐C 3 N 4 heterojunction was prepared by growing highly dispersed POPD nanoparticles on the g‐C 3 N 4 .…”