Cl/S co-doped carbon nitride nanotube clusters effectively drive the metal-free photo-Fenton reaction under visible light: A new ROS conversion mechanism

Jiang, Guofei; Wang, Xueyao; Zhu, Benjie; Gong, Jieyi; Liu, Fang; Wang, Yongqiang; Zhao, Chaocheng

doi:10.1016/j.carbon.2021.12.102

Cited by 26 publications

(9 citation statements)

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“…As the catalyst addition increased from 0.1 g/L to 0.5 g/L, the degradation rate of tetracycline also increased from 61.2 % to 99.9 %. When catalyst concentration is too high, the turbidity of the solution will increase, resulting in poor light transmission, and therefore the ability to generate free radicals by photoexcitation is reduced, and the photocatalytic performance cannot be improved [39] . Hence, the degradability of the tetracycline wastewater by SCN/NT‐2@PTFE membrane with a concentration of 0.7 g/L was only slightly improved.…”

Section: Resultsmentioning

confidence: 99%

“…When catalyst concentration is too high, the turbidity of the solution will increase, resulting in poor light transmission, and therefore the ability to generate free radicals by photoexcitation is reduced, and the photocatalytic performance cannot be improved. [39] Hence, the degradability of the tetracycline wastewater by SCN/NT-2@PTFE membrane with a concentration of 0.7 g/L was only slightly improved. By drawing plots of -ln (C t /C 0 ) versus t (Figure 7b), the decompose process of tetracycline still conformed to the first-order kinetic reaction model.…”

Section: Chemistryselectmentioning

confidence: 96%

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S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

et al. 2022

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Herein we synthesized S‐g‐C3N4 and N−TiO2 catalysts by hydrothermal and calcination technologies and SCN/NT@PTFE membrane by a vacuum filtration method. The morphology and composition of the synthesized materials were analyzed by different characterization methods (SEM/HRTEM/XRD/XPS/UV‐vis et.). The effects of different catalysts, pollutant concentrations, mass of catalyst and pH on the photo‐degradation of tetracycline were investigated. The degradation rate of tetracycline by SCN/NT‐2@PTFE membrane was as high as 99.9 % after 2 h of illumination. This was mainly because heterogeneous structure between S‐g‐C3N4 and N−TiO2 broadened the light absorption range and suppressed the carrier complex. Superoxide radicals (⋅O2−) were proved to play a dominant role in the degradation reaction. After 20 days of stirring in water, the photocatalytic performance of membrane decreased slightly, demonstrating its good stability. The study of SCN/NT‐2@PTFE membrane provides a new direction for the development of photocatalysis and membrane.

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Section: Resultsmentioning

confidence: 99%

Section: Chemistryselectmentioning

confidence: 96%

S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

et al. 2022

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“…Moreover, many curved nanotube clusters are arranged uniformly and orderly among the nanosheets. The preparation process of g-C 3 N 4 obviously underwent multi-step structural changes, in which the transverse stripping of the intermediates was the fundamental reason for reducing the diameter of g-C 3 N 4 tubes [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Phosphoprotein Detection in Sweat Realized by Intercalation Structure 2D@3D g-C3N4@Fe3O4 Wearable Sensitive Motif

Qiao

Zhao

et al. 2022

Biosensors

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Abnormal protein phosphorylation in sweat metabolites is closely related to cancer, cardiovascular disease, and other diseases. The real-time monitoring of phosphoproteins in sweat is significant for early monitoring of disease biomarkers. Here, a high-efficiency electrochemical sensor for phosphoprotein in sweat was realized by 2D@3D g-C3N4@Fe3O4 with intercalation structure. Common phosphoprotein β-Casein was selected to demonstrate the platform’s functionalities. The detection limit of g-C3N4@Fe3O4 could be as low as 9.7 μM, and the detection range was from 0.01 mg/mL to 1 mg/mL. In addition, the sensing platform showed good selectivity, reproducibility, and stability. We also investigated the effects of interface structure on adsorption properties and electronic properties of the g-C3N4 and Fe3O4 heterostructure using DFT. More electrons from Fe3O4 were transferred to g-C3N4, which increased the electrons in the energy band of N atoms and promoted the formation of stable N–H bonds with H atoms in phosphoproteins. We demonstrated phosphoprotein sensor functionality by measuring the phosphoprotein in human sweat during exercising. This work realizes a sensing platform for noninvasive and continuous detection of sweat phosphoproteins in wearable devices.

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“…Among numerous existing materials, graphitic carbon nitride stands out owing to its excellent physical and chemical stability, narrow band gap, and facile fabrication. − The above features enable carbon nitride to be applied in water splitting. Nevertheless, the disadvantages of carbon nitride cause limited photocatalytic ability, including a small surface area and insufficient visible-light-harvesting ability. − Much effort has been devoted to overcoming the above defects to boost its photocatalytic performance, such as metal and nonmetal atom doping, morphology control, creating heterojunction with other materials, and introducing vacancies. − Among these strategies, the introduction of metal and nonmetal atoms (B, F, S, O, Fe, Mo) is prospective for promoting the catalytic ability of carbon nitride. − Long et al prepared O-doped carbon nitride by a one-step annealing way . The O-doped carbon nitride with a modified texture exhibited improved photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Controlling Electronic Properties of Carbon Nitride Nanotubes by Carbon Doping for Photocatalytic H₂ Production

Zhao,

An,

Wang

et al. 2023

ACS Appl. Nano Mater.

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Carbon nitride is a promising photocatalyst, but its catalytic performance is inhibited by a low charge-transfer rate and a limited surface area. Herein, a carbon (C)-doped carbon nitride nanotube with abundant π-electrons was developed by using nicotinamide and melamine as precursors through a supramolecular self-assembly method. The experiments and density functional theory (DFT) analysis prove the important function of doped C in catalytic performance. Carbon doping endows carbon nitride with plentiful π-electrons, which effectively promote charge migration and separation. Besides, the nanotubular structure provides unique porous channels for water splitting and an improved light-harvesting ability. Benefiting from the synergic effects of carbon doping and tubular texture, carbon-doped carbon nitride exhibits an excellent H2 evolution rate of 10 089 μmol h–1 g–1 with Pt and triethanolamine (TEOA) as a cocatalyst and a sacrificial agent, respectively, under λ ≥ 400 nm, which is superior to bulk CN (920 μmol h–1 g–1). This significant method offers guidance for the adjustment of the texture and electron density within carbon nitride.

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Cl/S co-doped carbon nitride nanotube clusters effectively drive the metal-free photo-Fenton reaction under visible light: A new ROS conversion mechanism

Cited by 26 publications

References 65 publications

S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

Phosphoprotein Detection in Sweat Realized by Intercalation Structure 2D@3D g-C3N4@Fe3O4 Wearable Sensitive Motif

Controlling Electronic Properties of Carbon Nitride Nanotubes by Carbon Doping for Photocatalytic H₂ Production

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Cl/S co-doped carbon nitride nanotube clusters effectively drive the metal-free photo-Fenton reaction under visible light: A new ROS conversion mechanism

Cited by 26 publications

References 65 publications

S‐g‐C3N4/N−TiO2 @PTFE Membrane for Photocatalytic Degradation of Tetracycline

S‐g‐C3N4/N−TiO2 @PTFE Membrane for Photocatalytic Degradation of Tetracycline

Phosphoprotein Detection in Sweat Realized by Intercalation Structure 2D@3D g-C3N4@Fe3O4 Wearable Sensitive Motif

Controlling Electronic Properties of Carbon Nitride Nanotubes by Carbon Doping for Photocatalytic H2 Production

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S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

S‐g‐C₃N₄/N−TiO₂ @PTFE Membrane for Photocatalytic Degradation of Tetracycline

Controlling Electronic Properties of Carbon Nitride Nanotubes by Carbon Doping for Photocatalytic H₂ Production