Engineering carbon-defects on ultrathin g-C3N4 allows one-pot output and dramatically boosts photoredox catalytic activity

Gao, Shuying; Wang, Xuyu; Song, Changjian; Zhou, Shijian; Yang, Fu; Kong, Yan

doi:10.1016/j.apcatb.2021.120272

Cited by 144 publications

(70 citation statements)

References 56 publications

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“…Figure 4b and d show high-resolution XPS spectra of C element in RC and MdC-Op. The peaks located at 284.7 eV, 286.7 and 287.8 eV are relative to C-C/C-H, C-O and O-C-O, respectively (Gao et al 2021).…”

Section: Structural Characterization Of Mdc-opmentioning

confidence: 99%

Cationic cotton modified by 3-chloro-2-hydroxypropyl trimethyl ammonium chloride for salt-free dyeing with high levelling performance

Zhai

Dong

et al. 2021

Cellulose

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Traditional dyeing process of cotton has caused a large amount of wastewater with high salt content, which seriously damages the ecological environment. In this work, cotton fabric was modified with 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in order to decrease the electrostatic repulsion with the anionic dyes. A systematic optimization of the process has been performed. The acid dyes were applied instead of the common reactive dyes to dye the modified fabrics. The advantage of the high dye-uptake of acid dyes is studied. The levelness of the fabric dyed by reactive dyes and acid dyes were compared. The adsorption process and the bindings between the modified fabric and anionic acid dyes were further explored. The dyeing process were optimized. Finally, the dye-uptake of the modified fabric dyed by optimized conditions achieves to about 92%, which is comparable to traditional cotton dyeing process.

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Section: Structural Characterization Of Mdc-opmentioning

confidence: 99%

Cationic cotton modified by 3-chloro-2-hydroxypropyl trimethyl ammonium chloride for salt-free dyeing with high levelling performance

Zhai

Dong

et al. 2021

Cellulose

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“…Compared with ZIS-Z, the composite has the characteristic peak around 810 cm −1 , which is due to the superposition of the characteristic peak of pCN-N (810 cm −1 ) and spectra of ZIS-Z. Figure 4c,d shows that all catalyst show a type-IV isotherm with a H3 hysteresis loop, indicating the existence of a mesoporous structure [49]. The enlarged N 2 adsorption-desorption isotherms of CN and pCN-N are shown in Figure S2.…”

Section: Photocatalyst Characterizationmentioning

confidence: 98%

Flower-Like Dual-Defective Z-Scheme Heterojunction g-C3N4/ZnIn2S4 High-Efficiency Photocatalytic Hydrogen Evolution and Degradation of Mixed Pollutants

Hou

Jin

et al. 2021

Nanomaterials

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Graphitic carbon nitride (g-C3N4) with a porous nano-structure, nitrogen vacancies, and oxygen-doping was prepared by the calcination method. Then, it was combined with ZnIn2S4 nanosheets containing zinc vacancies to construct a three-dimensional (3D) flower-like Z-scheme heterojunction (pCN-N/ZIS-Z), which was used for photocatalytic hydrogen evolution and the degradation of mixed pollutants. The constructed Z-scheme heterojunction improved the efficiency of photogenerated charges separation and migration, and the large surface area and porous characteristics provided more active sites. Doping and defect engineering can change the bandgap structure to improve the utilization of visible light, and can also capture photogenerated electrons to inhibit recombination, so as to promote the use of photogenerated electron-hole pairs in the photocatalytic redox process. Heterojunction and defect engineering synergized to form a continuous and efficient conductive operation framework, which achieves the hydrogen production of pCN-N/ZIS-Z (9189.8 µmol·h−1·g−1) at 58.9 times that of g-C3N4 (155.9 µmol·h−1·g−1), and the degradation rates of methyl orange and metronidazole in the mixed solution were 98.7% and 92.5%, respectively. Our research provides potential ideas for constructing a green and environmentally friendly Z-scheme heterojunction catalyst based on defect engineering to address the energy crisis and environmental restoration.

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“…Gao et al developed a thermal-triggering gas-shocking exfoliation method for preparation of ultrathin porous g-C 3 N 4 nanosheets (Figure 2d). 62 This method utilizes aqueous solution as the precursor containing urea and water, and reaction is completed by direct pyrolysis of the aqueous precursor. The solvent water molecules function as the gaseous template assistant producing endogenous gases including NH 3 and CO 2 and exfoliate g-C 3 N 4 materials in an one-pot reaction without further exfoliation treatment.…”

Section: Nanostructure Engineering Strategies Of Graphitic Carbon Nit...mentioning

confidence: 99%

Section: Nanostructure Engineering Strategies Of Graphitic Carbon Nit...mentioning

confidence: 99%

“…Gao et al . developed a thermal-triggering gas-shocking exfoliation method for preparation of ultrathin porous g-C 3 N 4 nanosheets (Figure d) . This method utilizes aqueous solution as the precursor containing urea and water, and reaction is completed by direct pyrolysis of the aqueous precursor.…”

Section: Nanostructure Engineering Strategies Of Graphitic Carbon Nit...mentioning

confidence: 99%

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Nanostructure Engineering of Graphitic Carbon Nitride for Electrochemical Applications

Lü

Chen

2021

ACS Nano

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Graphitic carbon nitride with ordered two-dimensional structure displays multiple properties, including tunable structure, suitable bandgap, high stability, and facile synthesis. Many achievements on this material have been made in photocatalysis, but the advantages have not yet been fully explored in electrochemical fields. The bulk structure with low conductivity impedes charge-transfer kinetics during electrochemical processes. Excessive nitrogen content leads to insufficient charge transfer, while bulk structures produce tortuous channels for mass transport. Some attempts have been made to address these issues by nanostructure engineering, such as ultrathin structure design, heterogeneous composition, defect engineering, and morphology control. These structureengineered nanomaterials have been successfully applied in electrochemical fields, including ionic actuators, flexible supercapacitors, lithium-ion batteries, and electrochemical sensors. Herein, a timely review on the latest advances in graphitic carbon nitride through various engineering strategies for electrochemical applications has been summarized. A perspective on critical challenges and future research directions is highlighted for graphitic carbon nitride in electrochemistry on the basis of existing research works and our experimental experience.

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Engineering carbon-defects on ultrathin g-C3N4 allows one-pot output and dramatically boosts photoredox catalytic activity

Cited by 144 publications

References 56 publications

Cationic cotton modified by 3-chloro-2-hydroxypropyl trimethyl ammonium chloride for salt-free dyeing with high levelling performance

Cationic cotton modified by 3-chloro-2-hydroxypropyl trimethyl ammonium chloride for salt-free dyeing with high levelling performance

Flower-Like Dual-Defective Z-Scheme Heterojunction g-C3N4/ZnIn2S4 High-Efficiency Photocatalytic Hydrogen Evolution and Degradation of Mixed Pollutants

Nanostructure Engineering of Graphitic Carbon Nitride for Electrochemical Applications

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