Efficiently and selectively photocatalytic cleavage of C C bond by C3N4 nanosheets: Defect-enhanced engineering and rational reaction route

Liang, Dong; Wu, Jingchen; Xie, Chao; Wen, Jie; Lyu, Yanhong; Sofer, Zdeněk; Zheng, Jianyun; Wang, Shuangyin

doi:10.1016/j.apcatb.2022.121690

Cited by 60 publications

(19 citation statements)

References 42 publications

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“…[ 29 ] Compared with the BCN sample (12 m 2 g −1 ), the SCN‐2 sample exhibits an increased BET surface area of 39 m 2 g −1 , which is beneficial to expose abundant active sites and increase photocatalytic activity. [ 30 ]…”

Section: Resultsmentioning

confidence: 99%

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

Luo

Chen

et al. 2023

Adv Funct Materials

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Multifunctional separation membrane is usually realized by multi‐component collaborative construction, which makes the membrane preparation method complicated and uncontrollable. Herein, a novel multifunctional photocatalytic separation membrane is prepared by vacuum self‐assembly of single seaweed‐like g‐C3N4 photocatalyst. The seaweed‐like g‐C3N4 gives membrane certain roughness, large specific surface area, excellent hydrophilicity and abundant transport channels. Through a systematic study, the membrane exhibits excellent separation of five oil‐in‐water emulsions with a maximum flux of 3114.0 ± 113.0 L m−2 h−1 bar−1 for 1, 2‐dichloroethane‐in‐water (Dc/W) emulsion and a maximum efficiency of 97.4 ± 0.1% for chloroform‐in‐water (C/W) emulsion. In addition, the seaweed‐like g‐C3N4 with large specific surface area and narrow bandgap render excellent visible light absorption characteristics and accelerate e−‐h+ pairs transport rate, giving the membrane excellent photocatalytic degradation and antibacterial properties. The membrane shows good degradation for eight different pollutants, among which the degradation effect for rhodamine B (RhB), methylene blue (MB), and crystal violet (CV) were ≈100%. The antibacterial efficiency against E. coli and S. aureus is also close to 100%. After 35 consecutive separations of C/W emulsion and 10 consecutive degradations of RhB, the membrane still maintains excellent separation performance. This long‐lasting multifunctional separation membrane exhibits broad application prospects in complex wastewater purification.

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Section: Resultsmentioning

confidence: 99%

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

Luo

Chen

et al. 2023

Adv Funct Materials

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“…35 The wide and strong absorption peaks at 3000 to 3500 cm −1 are due to the N−H stretching vibration. 36 The intensity of these peaks gradually increases with the K-CN content in the sample. Intriguingly, the signal from the cyano group disappears in the K-CNx/ZIS; while for the mixture of K-CN and ZIS prepared by ultrasonication of the two components with weight ratio the same as that in K-CN2/ ZIS, the signal from cyano group is detectable (Figure S3).…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…The peak at 2180 cm –1 speaks for the presence of cyano group in the K-CN framework . The wide and strong absorption peaks at 3000 to 3500 cm –1 are due to the N–H stretching vibration . The intensity of these peaks gradually increases with the K-CN content in the sample.…”

Section: Resultsmentioning

confidence: 98%

Artificial Photosynthesis of H₂O₂ by Synergistically Interplayed ZnIn₂S₄ and K⁺-Incorporated Polymeric Carbon Nitride

Zeng

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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On-site production of H 2 O 2 from O 2 and H 2 O by way of artificial photosynthesis is highly desirable for facilitating the application of H 2 O 2 -based advanced oxidation processes. Achieving descent H 2 O 2 production efficiency is challenging, due to the severe recombination of the photoinduced charges and the sluggish kinetics of the water oxidation reaction. In this work, a heterojunction of exfoliated K + -doped polymeric carbon nitride (K-CN) and zinc indium sulfide (ZnIn 2 S 4 , ZIS) is constructed; an interfacial electric field is induced, and partial charge transfer from ZIS to K-CN is verified via a spectroscopic technique. The spatial separation of the photoinduced charges is significantly enhanced, and a remarkable photocatalytic H 2 O 2 production from O 2 and H 2 O is thus achieved, e.g., 1729.9 μmol h −1 g −1 and apparent quantum yield of 2.43% under irradiation of 420 nm. Mechanistic investigations reveal the essential role of superoxide radical (O 2 • − ) in O 2 to H 2 O 2 conversion.

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“…As to the lignin photoreforming, reasonable mechanisms that have been admitted and proved by most of the lignin model compound studies could be comprised of two parts: (1) Direct reaction between photogenerated carriers with lignin. Photoinduced Holes will attack the C α −H of the β‐O‐4 bond of lignin to form C α radical first, following, electrons combine generated C α radicals to facilitate the C−O bonds cleavage, [49] which is similar to the breaking of C−C bonds [50] . (2) Indirect reaction between photogenerated carriers with lignin.…”

Section: Photocatalytic Performance and Propertiesmentioning

confidence: 99%

“…Photoinduced Holes will attack the C α À H of the β-O-4 bond of lignin to form C α radical first, following, electrons combine generated C α radicals to facilitate the CÀ O bonds cleavage, [49] which is similar to the breaking of CÀ C bonds. [50] (2) Indirect reaction between photogenerated carriers with lignin. Generated electrons and holes could combine dissolved O 2 and H 2 O 2 molecules to form oxygen-containing free radicals, respectively.…”

Section: Photocatalytic Performance and Propertiesmentioning

confidence: 99%

Photoreforming for Lignin Upgrading: A Critical Review

et al. 2023

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Photoreforming of lignocellulosic biomass to simultaneously produce gas fuels and value‐added chemicals has gradually emerged as a promising strategy to alleviate the fossil fuels crisis. Compared to cellulose and hemicellulose, the exploitation and utilization of lignin via photoreforming are still at the early and more exciting stages. This review systematically summarizes the latest progress on the photoreforming of lignin‐derived model components and “real” lignin, aiming to provide insights for lignin photocatalytic valorization from fundamental to industrial applications. Considering the complexity of lignin physicochemical properties, related analytic methods are also introduced to characterize lignin photocatalytic conversion and product distribution. We finally put forward the challenges and perspective of lignin photoreforming, hoping to provide some guidance to valorize biomass into value‐added chemicals and fuels via a mild photoreforming process in the future.

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Efficiently and selectively photocatalytic cleavage of C C bond by C3N4 nanosheets: Defect-enhanced engineering and rational reaction route

Cited by 60 publications

References 42 publications

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

Artificial Photosynthesis of H₂O₂ by Synergistically Interplayed ZnIn₂S₄ and K⁺-Incorporated Polymeric Carbon Nitride

Photoreforming for Lignin Upgrading: A Critical Review

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Efficiently and selectively photocatalytic cleavage of C C bond by C3N4 nanosheets: Defect-enhanced engineering and rational reaction route

Cited by 60 publications

References 42 publications

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C3N4

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C3N4

Artificial Photosynthesis of H2O2 by Synergistically Interplayed ZnIn2S4 and K+-Incorporated Polymeric Carbon Nitride

Photoreforming for Lignin Upgrading: A Critical Review

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Product

Resources

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A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single‐Component Seaweed‐Like g‐C₃N₄

Artificial Photosynthesis of H₂O₂ by Synergistically Interplayed ZnIn₂S₄ and K⁺-Incorporated Polymeric Carbon Nitride