Study of cyano and hydroxyl groups modification on the properties of porous carbon nitride synthesized by using a salt assistant method

Ma, Haoxuan; Jia, Yuefa; Zhu, Gangqiang; Zhang, Fuchun; Rhee, S. J.; Lee, Bowha; Liu, Chunli

doi:10.1016/j.apsusc.2019.144885

Cited by 40 publications

(32 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, an additional peak appears at 2180 cm −1 for LCN and M‐LCN, corresponding to the asymmetric stretching vibration of cyano stretch (−C≡N) 31 . Such cyano‐terminated groups were also observed in the CN materials synthesized by microwave‐assisted synthesis 32 or conventional thermal condensation in melt salts, 33,34 which are believed to modulate the electronic and band structure of CN and improve its photon‐to‐electron conversion efficiency 35 …”

Section: Resultsmentioning

confidence: 94%

Laser direct writing derived robust carbon nitride films with efficient photon‐to‐electron conversion for multifunctional photoelectrical applications

Tan

Peng

et al. 2022

Carbon Energy

View full text Add to dashboard Cite

Carbon nitride, an emerging polymeric semiconductor, has attracted attention in research ranging from photocatalysis to photodetection due to its favorable visible light response and high physicochemical stability. For its practical device application, the fabrication of high-quality carbon nitride films on substrates is essential. However, conventional methodologies to achieve high polymerization of carbon nitride are often accompanied by its decomposition, significantly compromising the film quality. Herein, we report an ultrafast fabrication of carbon nitride film by laser direct writing (LDW). The instantaneous high temperature and pressure during LDW can efficiently boost the polymerization of carbon nitride and suppress its decomposition, resulting in high-quality carbon nitride film with excellent mechanical stability with the substrate. Due to the efficient photon-to-electron conversion, it exhibits an outstanding photoelectrochemical water splitting and optoelectronic detection capability, even under strong acid/alkaline conditions. This study thus offers a facile and efficient LDW strategy for the rapid fabrication of carbon nitride film photoelectrodes, demonstrating its great feasibility in multifunctional photoelectrical applications, including but not limited to photoelectrochemical water splitting and optoelectronic detection.

show abstract

Section: Resultsmentioning

confidence: 94%

Laser direct writing derived robust carbon nitride films with efficient photon‐to‐electron conversion for multifunctional photoelectrical applications

Tan

Peng

et al. 2022

Carbon Energy

View full text Add to dashboard Cite

show abstract

“…This can be explained by the introduction of cyano groups, whose binding energy was lower than that of the sp 3 tertiary nitrogen but higher than that of the sp 2 -hybridized nitrogen. 42 Another noticeable change was the reduced amounts of amino groups as evident by the decreased peak intensity at 401.0 eV. In the pristine CN O 1s spectra (Figure 3c), the peak at 532.7 eV represents the adsorbed water on the g-CN surfaces.…”

Section: Resultsmentioning

confidence: 95%

“…For Na (0.3) -CN, the N C3 peak shifted toward a lower binding energy. This can be explained by the introduction of cyano groups, whose binding energy was lower than that of the sp 3 tertiary nitrogen but higher than that of the sp 2 -hybridized nitrogen . Another noticeable change was the reduced amounts of amino groups as evident by the decreased peak intensity at 401.0 eV.…”

Section: Resultsmentioning

confidence: 99%

Na-Doped Graphitic Carbon Nitride for Removal of Aqueous Contaminants via Adsorption and Photodegradation

Yan

Gao

Chen

2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Graphitic carbon nitride (g-CN) has gained significant popularity as a visible-light-activated photocatalyst in energy and environmental applications. Most papers are dedicated to improving its photocatalytic performance; however, an investigation of its adsorption performance not only expands its application scope but also provides insight into its surface interactions. Herein, sodium-doped g-CN (Na(x)-CN) is synthesized via one-step pyrolysis of the mixture of melamine and sodium carbonate (Na2CO3). The prepared Na(x)-CN not only demonstrates superior adsorption capacities (maximum adsorption capacity of methylene blue up to 1319 mg/g, which is ∼650 times higher than that of the pristine g-CN) but also overcomes the lack of selectivity and slow adsorption kinetics of commonly used adsorbents. The extraordinary adsorption capacities are mainly attributed to π–π interactions and electrostatic interactions. Moreover, the Na2CO3-assisted synthesis route improved the optical properties and photocarrier separation efficiency, which are beneficial for further removal of contaminants via photodegradation. This work introduces a facile route for mass production of Na-doped g-CN with excellent adsorption capacities and selectivity as well as enhanced photocatalytic performance.

show abstract

“…7(d) shows two peaks with the binding energies of 532.2 eV and 533.5 eV, where refers to the H-O bond and N-C-O bond of the mesoporous g-C 3 N 4 , respectively. [21,41,42] In addition, the characteristic peaks of GM-1.4 moved to a larger band, and the peak intensity at 534.0 eV was weaker than GB, indicating that there were less N-C-O species in the GM-1.4. ).…”

Section: Characterization Analysismentioning

confidence: 95%

Enhanced the Synergistic Effect of Tetracycline Adsorption and Photocatalytic Degradation on a Mesoporous Carbon Nitride

Liu

Ding

et al. 2022

J Inorg Organomet Polym

View full text Add to dashboard Cite

A novel mesoporous g-C 3 N 4 with guanidine hydrochloride as precursor was prepared by molten salt assisted hard template of silica (SiO 2 ) aerogel for photocatalytic degradation of tetracycline (TC). The textural structure, chemical composition, morphology and optical properties of mesoporous g-C 3 N 4 were characterized by a series of means, and the synergistic effect of adsorption and photocatalytic degradation of TC was elucidated. The results show that the successfully synthesized mesoporous g-C 3 N 4 presented a coral-like rod shaped and heptazine ring structure. When the amount of SiO 2 aerogel template was 1.4 g, the richer nitrogen defects of the sample (GM-1.4) with the lower band gap (2.42 eV) was displayed.The photocatalytic degradation rate of GM-1.4 for TC was reached to 83.4% under visible illumination for 120 min. Furthermore, the •O 2 and h + were proved to be the main active species, and the reasons of TC photodegradation were associated with the destruction of TC molecular structure.

show abstract

Study of cyano and hydroxyl groups modification on the properties of porous carbon nitride synthesized by using a salt assistant method

Cited by 40 publications

References 56 publications

Laser direct writing derived robust carbon nitride films with efficient photon‐to‐electron conversion for multifunctional photoelectrical applications

Laser direct writing derived robust carbon nitride films with efficient photon‐to‐electron conversion for multifunctional photoelectrical applications

Na-Doped Graphitic Carbon Nitride for Removal of Aqueous Contaminants via Adsorption and Photodegradation

Enhanced the Synergistic Effect of Tetracycline Adsorption and Photocatalytic Degradation on a Mesoporous Carbon Nitride

Contact Info

Product

Resources

About