In Situ Coupling Carbon Defective C3N5 Nanosheet with Ag2CO3 for Effective Degradation of Methylene Blue and Tetracycline Hydrochloride

Abstract

The development of novel catalysts for degrading organic contaminants in water is a current hot topic in photocatalysis research for environmental protection. In this study, C3N5 nanosheet/Ag2CO3 nanocomposites (CNAC-X) were used as efficient photocatalysts for the visible-light-driven degradation of methylene blue (MB), and tetracycline hydrochloride (TC-HCl) was synthesized for the first time using a simple thermal oxidative exfoliation and in situ deposition method. Due to the synergistic effect of nanosheet structures, carbon defects, and Z-scheme heterojunctions, CNAC-10 exhibited the highest photocatalytic activity, with photodegradation efficiencies of 96.5% and 97.6% for MB (60 mg/L) and TC-HCl (50 mg/L) within 90 and 100 min, respectively. The radical trapping experiments showed that ·O2− and h+ played major roles in the photocatalytic effect of the CNAC-10 system. Furthermore, intermediates in the photodegradation of MB and TC-HCl were investigated to determine possible mineralization pathways. The results indicated that C3N5 nanosheet/Ag2CO3 photocatalysts prepared in this work could provide an effective reference for the treatment of organic wastewater.

Impact of nitrogen doping on triazole-based graphitic carbon Nitride-TiO2 (P25) S-scheme heterojunction for improved photocatalytic hydrogen production

“…XPS survey data conrmed that NCNT 5 , NCN, and TiO 4k. 3,46 X-ray photoelectron spectroscopy and g-CN and NCN results all supported the idea that the g-C 3 N 5 structure was successfully formed and well preserved in these samples before N-doping. In general, surface electron density is negatively related to binding energy.…”

“…Lattice spacings of 0.351 and 0.246 nm correspond to the (110, 004) planes of the rutile and anatase phases of TiO 2 . 46,47 3.3. Sample pore size analysis N 2 adsorption analysis was also used to limit the textural assets of as-arranged samples.…”

Nitrogen‐rich graphitic carbon nitride (g‐C3N5): Emerging low‐bandgap materials for photocatalysis

“…Reproduced with permission: Copyright 2023, Wiley-VCH. [89] T A B L E 3 Summaries of removal studies of heavy metals and NO on g-C 3 N 5 -based materials from the literature.…”

“…Take Jiao's work as a demonstration. [ 89 ] This group fabricated g‐C 3 N 5 coupled with BiOCl to form Z‐scheme heterojunction photocatalysts for the removal of RhB and CIP with promising results. From the results, as shown in Figure 27, reactive species such as superoxide could significantly contribute to degradation pollutants in paralleling with oxidative holes.…”

Engineered g-C3N5-Based Nanomaterials for Photocatalytic Energy Conversion and Environmental Remediation

“…The photocatalytic activity of g-C 3 N 5 materials can be boosted by constructing heterojunctions with another semiconductor. Until now, many g-C 3 N 5 -based heterostructures have been synthesized for energy conversions and environmental governance, such as g-C 3 N 5 /BiOBr [ 41 ], Bi 4 O 5 Br 2 /g-C 3 N 5 [ 42 ], Bi 4 O 5 I 2 /g-C 3 N 5 [ 43 ], Bi 2 WO 6 /g-C 3 N 5 [ 44 ], Bi 2 MoO 6 /g-C 3 N 5 [ 45 ], CeTi 2 O 6 /g-C 3 N 5 [ 46 ], Ag 3 PO 4 /g-C 3 N 5 [ 47 ], Ag 2 CO 3 /g-C 3 N 5 [ 48 ], AgCl/g-C 3 N 5 [ 49 ], FeOCl/g-C 3 N 5 [ 50 ], LaCoO 3 /g-C 3 N 5 [ 51 ], and MOFs/g-C 3 N 5 [ 52 ]. This section will give a brief overview of heterojunctions based on g-C 3 N 5 , including type-I heterojunction, type-II heterojunction, Z-scheme heterojunction or S-scheme heterojunction, and Schottky junction.…”