Guanine-derived nitrogen-doped carbon nanosheets for selective oxidation of benzyl alcohol

Li, Shuchun; Ke, Yiling; Zhang, Xuefei; Wu, Shuchang; Chen, Yiquan; Xie, Zailai

doi:10.1016/j.diamond.2022.109642

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…When the temperature was gradually increased from 700 • C to 900 • C, the BET specific surface area (Table A1) was correspondingly promoted from 30.34 m 2 g −1 for CNN-1-9-700 to 199.03 m 2 g −1 for CNN-1-9-900, and the pore volume was raised from 0.045 cm 3 g −1 to 0.29 cm 3 g −1 , contributing to the gradual exfoliation of the carbon materials and leading to an increase in the number of active sites. However, continuing to raise the temperature, the surface area of CNN-1-9-1000 decreased to 148.33 m 2 g −1 with a pore volume of 0.24 cm 3 g −1 , probably because some of the pores collapsed at such a high temperature [12]. N2 adsorption-desorption tests of CNN-1-9-Y were conducted to investigate bonization temperature effects.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the states of N atoms in CNN-1-9-Y were investigated in detail by N 1s spectra (Figure 7b). All the spectra could be divided into four peaks, attributed to pyridinic N (398.3 eV), pyrrolic N (399.5 eV), graphitic N (401.0 eV), and oxidized N (404.1 eV), respectively [12,13]. The sums of the relative proportions of pyridinic N and graphitic N in the total N atoms (Table A2) were 69.8%, 72.7%, 85.0%, and 82.1%, respectively, for CNN-1-9-700, CNN-1-9-800, CNN-1-9-900, and CNN-1-9-1000.…”

Section: Resultsmentioning

confidence: 99%

“…However, the high cost, easy aggregation and the detachment of the metals still limit their large-scale utilization. Under the circumstances, metal-free carbonaceous catalysts have received extensive attention in recent years as promising catalysts for selective oxidation of alcohols as well as other organic compounds owing to their low cost, excellent stability, diverse structures, and easy functionalization [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Porous Carbon Derived from Covalent Triazine Framework for Catalytic Oxidation of Benzyl Alcohol

Pan,

Zhu,

Yang

et al. 2024

Nanomaterials

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The catalytic oxidation of alcohols is an important transformation in the chemical industry. Carbon materials with a large surface area and N doping show great promise as metal-free catalysts for the reaction. In this study, a rich N-containing covalent triazine framework polymerized by cyanuric chloride and p-phenylenediamine was used to synthesize N-doped porous carbon with the assistance of a pore-forming agent—NaCl. First, the mass ratio of the polymer/NaCl was optimized to 1:9. Then, the influence of the pyrolysis temperatures (700–1000 °C) on the materials was studied in detail. It was found that the carbon materials were gradually exfoliated by molten salt at high temperatures. XRD and Raman characterizations showed them with a certain graphitization. The optimal doped carbon CNN-1-9-900 achieved the highest surface area of 199.03 m2g−1 with the largest pore volume of 0.29 cm3g−1. Furthermore, it had a high N content of 9.9 at% with the highest relative proportion of pyridinic/graphitic N. Due to the synergistic effect between the surface area and pyridinic/graphitic N, CNN-1-9-900 showed the best performance for benzyl alcohol oxidation with TBHP at moderate conditions, and the process also worked for its derivatives.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen-Doped Porous Carbon Derived from Covalent Triazine Framework for Catalytic Oxidation of Benzyl Alcohol

Pan,

Zhu,

Yang

et al. 2024

Nanomaterials

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“…Compared to before adsorption, there was a corresponding decrease in the content of -COOH and an increase in the content of C = O. These nding indicated the hexavalent chromium adsorption on S-BC may involve the interaction between carbonyl and carboxyl groups(Li et al 2023).…”

mentioning

confidence: 79%

Synergistic effects between adsorption and chemical reduction towards the effective Cr(Ⅵ) removal in the presence of the sulfur-doped biochar material

Ma,

Xu,

Zhang

et al. 2023

Preprint

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As the major by-products of municipal sewage treatment, the waste activated sludge (WAS) gives rise to secondary pollution to the environment and threatens human health without proper disposal. On the other side, hexavalent chromium (Cr(Ⅵ)) is among the 17 chemicals that pose the most detrimental effects to human beings. Herein, the anaerobic sludge withdrawn from thickener in a sewage treatment plant served as the precursor for sludge-based bichoar fabrication, which was further modified via the sulfur (S) heteroatom doping (i.e. S-BC). The S atom doping resulted in the adjustment of the physicochemical properties towards the carbon material, endowment of abundant functional groups on biochar surface, as well as increasing the binding sites between biochar and Cr(Ⅵ). Compared to the primary biochar (i.e. biochar without heteroatomic doping, named BC), S-BC exhibiting the rough surface, had remarkable advantages in ash content, specific surface area, and pore volume. and its specific surface area was 16.7 m2/g, which was significantly larger than BC-500 (9.4 m2/g). The existence of graphene carbon crystal structure for S-BC was confirmed through S-BC by XRD and FTIR analysis. The removal of Cr(Ⅵ) efficiency by S-BC could reach 91.8% under initial Cr(Ⅵ) concentration of 30 mg/L, S-BC amount of 0.8 g and pH of 3.0. The analysis of adsorption kinetics and isotherms showed that pseudo-second-order kinetics and Langmuir model more fitted the results of of Cr(Ⅵ) removal behavior in the presence of S-BC. Therefore, the chemisorption and monolayer adsorption were the primary mechanisms involved in the Cr(Ⅵ) removal process. Additionally, XPS analysis results illustrated the aqueous Cr(Ⅵ) was efficiently eliminated through the synergistic effect of chemisorption and reduction to Cr(Ⅲ) in the presence of S-BC. Moreover, S-BC could still achieve the Cr(VI) eliminating efficiency of 85.31% after five cycles with functional group and crystal structure almost unchanged.

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Guanine-derived F, N co-doped carbon-shell encapsulated iron carbide nanoparticles for enhanced CO2 electroreduction activity

Chen,

Pei,

Peng

et al. 2024

Nano Res.

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Guanine-derived nitrogen-doped carbon nanosheets for selective oxidation of benzyl alcohol

Cited by 4 publications

References 29 publications

Nitrogen-Doped Porous Carbon Derived from Covalent Triazine Framework for Catalytic Oxidation of Benzyl Alcohol

Nitrogen-Doped Porous Carbon Derived from Covalent Triazine Framework for Catalytic Oxidation of Benzyl Alcohol

Synergistic effects between adsorption and chemical reduction towards the effective Cr(Ⅵ) removal in the presence of the sulfur-doped biochar material

Guanine-derived F, N co-doped carbon-shell encapsulated iron carbide nanoparticles for enhanced CO2 electroreduction activity

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