Fabrication of Mn/P co-doped hollow tubular carbon nitride by a one-step hydrothermal–calcination method for the photocatalytic degradation of organic pollutants

Wang, Dongbo; Dong, Xiyuan; Ye, Lei; Lin, Changqing; Huang, Dan; Yu, Xin; Zhang, Xuan

doi:10.1039/d2cy01107g

Cited by 10 publications

(1 citation statement)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polymer organic semiconductor carbon nitride (g-C 3 N 4 ) has attracted much attention as an ideal and sustainable photocatalyst for hydrogen production due to its fantastic advantages such as high chemical and thermal stability, moderate band gap, easy synthesis, and nontoxicity to the environment. − Moreover, some drawbacks of bulk g-C 3 N 4 , such as insufficient visible light absorption, fast recombination of photogenerated e – /h + pairs, and low specific surface area could be overcome by fine-tuning its texture and photoelectronic properties using simple inorganic or organic processing tools. , Among the various modification strategies, thermal and liquid exfoliation, , pore texture adjustment, , heterojunction fabrication, , and noble metal nanoparticles (NPs) deposition , can extend the visible light response range and boost the charge separation and transport of pristine g-C 3 N 4 at the nanoscale, while direct atomic engineering of heptazine repeat units by metal/nonmetal doping to create carbon- or nitrogen-vacancy defects as well as structural defects also shows great potential to improve the photocatalytic performance of g-C 3 N 4 . − …”

Section: Introductionmentioning

confidence: 99%

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production

Lu,

Yuan,

Chen

et al. 2024

Langmuir

View full text Add to dashboard Cite

In recent years, graphitic carbon nitride (g-C3N4) has attracted considerable attention because it includes earth-abundant carbon and nitrogen elements and exhibits good chemical and thermal stability owing to the strong covalent interaction in its conjugated layer structure. However, bulk g-C3N4 has some disadvantages of low specific surface area, poor light absorption, rapid recombination of photogenerated charge carriers, and insufficient active sites, which hinder its practical applications. In this study, we design and synthesize potassium single-atom (K SAs)-doped g-C3N4 porous nanosheets (CM-KX, where X represents the mass of KHP added) via supramolecular self-assembling and chemical cross-linking copolymerization strategies. The results show that the utilization of supramolecules as precursors can produce g-C3N4 nanosheets with reduced thickness, increased surface area, and abundant mesopores. In addition, the intercalation of K atoms within the g-C3N4 nitrogen pots through the formation of K–N bonds results in the reduction of the band gap and expansion of the visible-light absorption range. The optimized K-doped CM-K12 nanosheets achieve a specific surface area of 127 m2 g–1, which is 11.4 times larger than that of the pristine g-C3N4 nanosheets. Furthermore, the optimal CM-K12 sample exhibits the maximum H2 production rate of 127.78 μmol h–1 under visible light (λ ≥ 420 nm), which is nearly 23 times higher than that of bare g-C3N4. This significant improvement of photocatalytic activity is attributed to the synergistic effects of the mesoporous structure and K SAs doping, which effectively increase the specific surface area, improve the visible-light absorption capacity, and facilitate the separation and transfer of photogenerated electron–hole pairs. Besides, the optimal sample shows good chemical stability for 20 h in the recycling experiments. Density functional theory calculations confirm that the introduction of K SAs significantly boosts the adsorption energy for water and decreases the activation energy barrier for the reduction of water to hydrogen.

show abstract

Section: Introductionmentioning

confidence: 99%

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production

Lu,

Yuan,

Chen

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

Phase transformation and heterojunction nanostructures of bismuth iron oxide

Xu,

Wang,

Wang

et al. 2023

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

The construction of an efficient bismuth iron oxide shows great potential in excellent crystal structure properties and visible light photocatalysis. However, it is challenging to synthesize nanostructures with the desired morphologies. For the first time, the bismuth iron oxide is fabricated using sol–gel synthesis method, exhibiting the desired crystallite size and tuning the types of heterojunction nanostructures by regulating the concentration of Fe3+ and calcination temperature. As a result, the feeding ratios of bismuth ferrite materials Bi2Fe4O9, BiFeO3/Bi2Fe4O9, BiFeO3, BiFeO3/Bi25FeO40, and Bi25FeO40 are 2:1, 1.5:1, 1:1, 0.75:1, 0.5:1, and 0.04:1, respectively. Besides, the calcination temperature not only influences the granularity of bismuth iron oxide but also promotes the phase transformation from BiFeO3 to Bi2Fe4O9. Moreover, BiFeO3/Bi2Fe4O9 and BiFeO3/Bi25FeO40 heterojunction nanostructures display strong interactions between BiFeO3–Bi2Fe4O9 and Bi25FeO40. Besides, BiFeO3/Bi25FeO40 heterojunction nanostructures exhibit obvious grain boundary with the smallest bandgap. This study presents far-reaching implications and provides pathways to prepare BiFeO3/Bi2Fe4O9 and BiFeO3/Bi25FeO40 heterojunction nanostructures.

show abstract

Preparation and characterization of a novel cobalt-substitution cadmium aluminate spinel for the photodegradation of azo dye pollutants

Rajesh¹,

Kumar²,

Akilandeswari³

et al. 2023

Chemosphere

View full text Add to dashboard Cite

Fabrication of Mn/P co-doped hollow tubular carbon nitride by a one-step hydrothermal–calcination method for the photocatalytic degradation of organic pollutants

Abstract: Efficient photocatalytic degradation of trace organic pollutants in aqueous environment by a hollow tubular carbon nitride co-doped with manganese and phosphorus under visible light.

Cited by 10 publications

References 71 publications

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production

Phase transformation and heterojunction nanostructures of bismuth iron oxide

Preparation and characterization of a novel cobalt-substitution cadmium aluminate spinel for the photodegradation of azo dye pollutants

Contact Info

Product

Resources

About

Fabrication of Mn/P co-doped hollow tubular carbon nitride by a one-step hydrothermal–calcination method for the photocatalytic degradation of organic pollutants

Abstract: Efficient photocatalytic degradation of trace organic pollutants in aqueous environment by a hollow tubular carbon nitride co-doped with manganese and phosphorus under visible light.

Cited by 10 publications

References 71 publications

Interlayer Potassium Single-Atom-Coordinated g-C3N4 for Significantly Boosted Visible Light Photocatalytic H2 Production

Interlayer Potassium Single-Atom-Coordinated g-C3N4 for Significantly Boosted Visible Light Photocatalytic H2 Production

Phase transformation and heterojunction nanostructures of bismuth iron oxide

Preparation and characterization of a novel cobalt-substitution cadmium aluminate spinel for the photodegradation of azo dye pollutants

Contact Info

Product

Resources

About

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production

Interlayer Potassium Single-Atom-Coordinated g-C₃N₄ for Significantly Boosted Visible Light Photocatalytic H₂ Production