Synthesis of BN/g‐C₃N₄ as Visible‐light‐driven Photocatalysts for Degradation of Different Organic Pollutants

Abstract

In this work, BN/g‐C3N4 composites were prepared by hydrothermal reaction. The BN/g‐C3N4 composites were successfully characterized by FTIR spectra, XRD, SEM, HRTEM, UV/Vis DRS, N2 adsorption–desorption isotherms and BET. The photocatalytic activities of the as‐prepared catalysts were evaluated by the degradation of different organic pollutants, such as Acid Red (AR), Rhodamine B (RhB), Congo Red (CR), Methyl Orange (MO), Methyl Red (MR), and Phenol. The best result showed that the 40 wt% BN was added to g‐C3N4 (BN/g‐C3N4‐4) achieved up to 99% decomposition of AR within 90 min under visible‐light irradiation. The kinetics of BN/g‐C3N4 ‐4 for degradation of AR was almost six times than that of pure g‐C3N4. Finally, the degradation processes of different pollutants and the photocatalytic mechanism had been explained concretely.

Synthesis, Characterization and Application of V2O5/S‐Doped Graphitic Carbon Nitride Nanocomposite for Removing of Organic Pollutants

“…The • O 2− radicals can oxidize species, and are enable to cleavage organic pollutants into the small molecules, e. g., CO 2 and H 2 O . Accordingly, the oxidation of organic pollutants especially methylene blue can be resulted from the photogenerated holes in the VB of V 2 O 5 (Scheme –) …”

g-C3N4-Mediated Synthesis of Cu2O To Obtain Porous Composites with Improved Visible Light Photocatalytic Degradation of Organic Dyes

“…Nitrogen sorption measurements and pore size distribution curves recorded at 77 K were used to estimate the surface area and porosity of the synthesized catalysts. The absorbance plot as a function of the wavelength for g-C 3 N 4 , which is known to be an indirect band gap material, 46 and Cu 2 O, a direct band gap material, 47 shows an absorption edge at around 430 and 630 nm corresponding to the band gap values of about 2.88 and 1.96 eV, respectively, as shown in Figure 4c. This was followed by the UV-DRS studies on the various composites.…”

In Situ Liquid‐Phase Growth Strategies of g‐C3N4Solar‐Driven Heterogeneous Catalysts for Environmental Applications

“…Other BN/g‐C 3 N 4 composites were also prepared by the hydrothermal reaction by Tu et al [ 63 ] Several organic pollutants, including acid red (AR), RhB, Congo red (CR), MO, methyl red, and phenol, were utilized to evaluate the photocatalytic activities of the as‐prepared catalysts. As shown in Figure 5d,e, BN/g‐C 3 N 4 ‐4 exhibited the highest degradation ability of AR, which achieved a degradation percentage rate of up to 99%.…”

“…d) Photodegradation percentage (%) of different percentage of BN/g-C 3 N 4 of AR, e) photodegradation percentage (%) of different pollutants of BN/g-C 3 N 4 -4 (0.05 g), f ) possible transformation pathways for photocatalytic degradation of pollutants of BN/g-C 3 N 4 -4. Reproduced with permission [63]. Copyright 2018, Wiley-VCH.…”