Dual molecules engineered carbon nitride for achieving outstanding photocatalytic H2O2 production

Wei, Wei; Zou, Leilei; Li, Jin; Hou, Fengming; Sheng, Zekai; Guo, Zhipeng; Wei, Ang

doi:10.1016/j.jcis.2023.01.046

Cited by 9 publications

(11 citation statements)

References 46 publications

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“…The ORR process of photocatalytic H 2 O 2 on the new carbon nitride is meaningfully boosted due to the increased H + migration and O 2 adsorption by the double-engineered pyrimidine moiety and cyano. [229] The above results show that a large number of cyano groups serve as the aggregation center and oxygen adsorption center of photogenerated electrons, providing a path for the two-electron reaction to generate hydrogen peroxide; at the same time, a large number of photogenerated holes will also decompose these alcohols to form a large number of protons to participate in the formation of hydrogen peroxide process. Li et al constructed cyano-modified carbon nitride for the photoreduction of CO 2 (Figure 14c), and the generation rates of CO (13.7 μmol h −1 g −1 ) and CH 4 (0.6 μmol h −1 g −1 ) were 2.5 and 2 times superior to those of g-C 3 N 4 , respectively, which was mainly owing to the good electron-absorbing ability of cyano (often used as electron acceptor).…”

Section: Photocatalytic Applications With Direct Participation Of Ele...mentioning

confidence: 79%

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Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Jing,

Xu,

Xie

et al. 2023

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Cyano‐rich g‐C3N4 materials are widely used in various fields of photochemistry due to the very powerful electron‐absorbing ability and electron storage function of cyano, as well as its advantages in improving light absorption, adjusting the energy band structure, increasing the polarization rate and electron density in the structure, active site concentration, and promoting oxygen activation ability. Notwithstanding, there is yet a huge knowledge break in the design, preparation, detection, application, and prospect of cyano‐rich g‐C3N4. Accordingly, an overall review is arranged to substantially comprehend the research progress and position of cyano‐rich g‐C3N4 materials. An overall overview of the current research position in the synthesis, characterization (determination of their location and quantity), application, and reaction mechanism analysis of cyano‐rich g‐C3N4 materials to provide a quantity of novel suggestions for cyano‐modified carbon nitride materials' construction is provided. In view of the prevailing challenges and outlooks of cyano‐rich g‐C3N4 materials, this paper will purify the growth direction of cyano‐rich g‐C3N4, to achieve a more in‐depth exploration and broaden the applications of cyano‐rich g‐C3N4.

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Section: Photocatalytic Applications With Direct Participation Of Ele...mentioning

confidence: 79%

“…This type of reactions currently includes: H 2 production, H 2 O 2 production, CO 2 reduction, N 2 fixation, and partial Cr (VI) reduction. [27,55,124,125,198,205,229] Figure 14. a) Mechanism diagram of photocatalytic H 2 production.…”

Section: Photocatalytic Applications With Direct Participation Of Ele...mentioning

confidence: 99%

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Jing,

Xu,

Xie

et al. 2023

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“…1a, see the ESI † for details). The successful synthesis of TFA-TaPt-COF-E was confirmed by FT-IR and 13 C solid-state NMR (Fig. S1 †).…”

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confidence: 85%

“…The formation of acetals between TFA and ethanol was confirmed by MALDI-TOF, 13 C liquid-state NMR, and FT-IR spectroscopy. The mass-to-charge ratio of 355.2 was consistent with the theoretical value of 1,4-bis(diethoxymethyl)-2,3,5,6-tetrafluorobenzene (Fig.…”

mentioning

confidence: 95%

“…In recent years, organic semiconductors, such as g-C 3 N 4 and covalent organic frameworks (COFs), have drawn great attention because their conjugated building blocks can endow them with electronic delocalization, so that they have an excellent visible-light response and the ability to migrate excitons. [10][11][12][13][14][15][16] COFs are new organic polymeric porous materials with a high surface area assembled by π-conjugated monomers via irreversible or reversible bonds, and have been applied in sensors, 17 storage, 18,19 purification, 20,21 and catalysis. [22][23][24][25][26][27][28][29][30][31] We showed previously that fluorinated imine-linked COF, TFA-TaPt-COF, has a higher structural stability than the unfluorinated one.…”

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confidence: 99%

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Improving the crystallinity of imine-linked covalent organic frameworks by acetal for enhanced photocatalytic H₂O₂evolution

Yang

et al. 2023

CrystEngComm

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Hydrogen peroxide electrosynthesis with nickel foam electrodes: influence mechanism of surface oxidation

Zhao,

Ding,

Zhu

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDNickel foam (NF) is widely used as battery electrode matrix and electrochemical process cathode. However, the surface of NF is prone to oxidation, which may affect its ability to reduce oxygen and produce H2O2, but the influence mechanism is still unclear. In this paper, surface oxidation of the NF was regulated by pickling and drying pretreatment, and the surface oxides were characterized by X‐ray photoelectron spectroscopy (XPS) and energy dispersive X‐ray spectrometry (EDS). The NF was used as the substrate, graphite powder as the catalyst, and PTFE as the binder to prepare graphite‐coated NF composite electrodes. The effect of NF surface oxidation on their ability to generate H2O2 was investigated.RESULTSThe results demonstrated that after pickling and drying, the NF surface generated a large amount of NiO, which increased the charge transfer resistance of the NF by 20.3%, and accelerated further reduction decomposition of H2O2. The rotating ring‐disk electrode (RRDE) tests further confirmed that NiO can reduce the two‐electron oxygen reaction selectivity, which was detrimental to H2O2 electrosynthesis. The graphite‐coated NF composite electrode with pristine NF as the substrate can produce 869.1 mg L−1 of H2O2 and maintain relatively good reusability.CONCLUSIONOverall, the surface oxidation of NF is not conducive to H2O2 electrosynthesis, and it is necessary to prevent oxidation during electrode preparation. This study provides a valuable reference for the preparation of NF electrodes and can promote the further study of in situ H2O2 electrosynthesis. © 2023 Society of Chemical Industry (SCI).

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Dual molecules engineered carbon nitride for achieving outstanding photocatalytic H2O2 production

Cited by 9 publications

References 46 publications

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Improving the crystallinity of imine-linked covalent organic frameworks by acetal for enhanced photocatalytic H₂O₂evolution

Hydrogen peroxide electrosynthesis with nickel foam electrodes: influence mechanism of surface oxidation

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Dual molecules engineered carbon nitride for achieving outstanding photocatalytic H2O2 production

Cited by 9 publications

References 46 publications

Cyano‐Rich g‐C3N4 in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C3N4 in Photochemistry: Design, Applications, and Prospects

Improving the crystallinity of imine-linked covalent organic frameworks by acetal for enhanced photocatalytic H2O2evolution

Hydrogen peroxide electrosynthesis with nickel foam electrodes: influence mechanism of surface oxidation

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Product

Resources

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Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Improving the crystallinity of imine-linked covalent organic frameworks by acetal for enhanced photocatalytic H₂O₂evolution