Self-assembly of a g-C<sub>3</sub>N<sub>4</sub>-based 3D aerogel induced by N-modified carbon dots for enhanced photocatalytic hydrogen production

Pu, Xiao-Long; Yang, Xuechun; Liang, Shan-Shan; Wang, Wenzhong; Zhao, Jing‐Tai; Zhang, Zhijun

doi:10.1039/d1ta06437a

Cited by 26 publications

(12 citation statements)

References 42 publications

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“…As shown in Figure a, NADH regeneration was completely quenched with the addition of AgNO 3 , which strongly confirmed the involvement of free radicals. In the EPR experiment, TEMPO was used as a trapping agent, which can convert into other substances after capturing electrons to reduce its triplet paramagnetic signal. , Clearly, more signal reduction can be observed in HRF-Au-10 than in RF in Figure b, which suggests that electron generation have greater effect on HRF-Au-10.…”

Section: Resultsmentioning

confidence: 99%

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

Zhou

Cai

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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For industrial enzymatic catalysis, efficient regeneration of nicotinamide adenine dinucleotide (NADH) is necessary. Herein, hollow resorcinol-formaldehyde resin nanospheres loaded with Au nanoparticles (HRF-Au) with shape-controllable nanostructures for photocatalysis were successfully prepared via the hard template method and photodeposition. As a novel photocatalyst, HRF-Au efficiently achieved a high NADH yield of 80.39% with a total reaction rate of 0.6 mmol•g catalyst −1•h −1 under visible light illumination, which was four times higher than pure resorcinol−formaldehyde resin nanospheres (RF). Also, the photocatalytic system achieved high operational stability and faster rates of NADH production to the partial traditional enzymatic regeneration systems. This exceedingly good activity is partly due to the improvement of photoelectric properties of HRF-Au, which was confirmed by a series of characterization. More importantly, by finite element simulations and energy band structure determination, the hollow sphere structure and localized surface plasmon resonance effect induces the bending of the RF energy band to form a Schottky junction. These were conducive to the generation, separation, and migration of carriers, so as to improve the performance of photocatalytic regeneration of NADH. Our study will contribute to the development of materials with efficient photocatalytic NADH regeneration performance. Meanwhile, the photocatalytic NADH regeneration system could operate continuously and stably, and the significant reduction in byproducts and costs make this sustainable green technology have great potential in the future under both ecological and economical concerns.

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Section: Resultsmentioning

confidence: 99%

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

Zhou

Cai

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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“…Conversion of CO 2 into useful chemicals such as CO, CH 4 , and CH 3 OH through solar energy can be considered as an attractive approach to resolve energy and environmental challenges. − In recent years, semiconductor materials including metal oxides (TiO 2 and Co 3 O 4 ), metal sulfides (CdS and In 2 S 3 ), carbon-based materials (carbon nitride and carbon quantum dots), metal organic frameworks (UIO-66-NH 2 and MIL-125-NH 2 ), and so on, have been reported for CO 2 photoconversion . Among them, TiO 2 has been known as one of the most promising semiconductors attributed to its high stability, low cost, and reasonable redox ability for CO 2 reduction .…”

Section: Introductionmentioning

confidence: 99%

In Situ Self-Assembled ZIF-67/MIL-125-Derived Co₃O₄/TiO₂ p–n Heterojunctions for Enhanced Photocatalytic CO₂ Reduction

Liang

Zhao

et al. 2022

Inorg. Chem.

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Photocatalytic CO2 reduction to carbon fuels is regarded as an ideal and sustainable way to provide clean energy and solve environmental crisis. Herein, a p–n Co3O4/TiO2 heterojunction photocatalyst was synthesized by one-step pyrolysis of self-assembly ZIF-67/MIL-125, which was used in photocatalytic CO2 reduction for the first time. Co3O4 nanocages were highly dispersed on the surface of TiO2 nanoplates with an intimate contact. The optimal Co3O4/TiO2 exhibited a significantly enhanced CO evolution rate of 1256 μmol g–1 h–1 under simulated solar light, which was 2.4 times higher than that of pure Co3O4. The high photocatalytic performance of Co3O4/TiO2 was attributed to its enriched active sites and formed p–n heterojunctions. According to the electrocatalytic measurements, the possible mechanism and photoinduced charge transfer process were discussed in detail. We believe that this research provides a facile and efficient approach to fabricate MOF-derived heterojunction photocatalysts for CO2 reduction.

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“…Since 2009, Wang and co-researchers found that g-C 3 N 4 photocatalyst could split water to produce hydrogen under visible light [8]. Research about g-C 3 N 4 -based catalysts for photocatalytic hydrogen production is emerging and will continue to be attractive [3,4,9,10] in the coming years. Nevertheless, the bulk g-C 3 N 4 still has the following defects [9,10]: (1) small specific surface area; (2) scarce reaction active site; (3) insufficient visible light absorption (λ < 460 nm) ability and low quantum efficiency; and (4) high recombination rate of photo-generated electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

“…Research about g-C 3 N 4 -based catalysts for photocatalytic hydrogen production is emerging and will continue to be attractive [3,4,9,10] in the coming years. Nevertheless, the bulk g-C 3 N 4 still has the following defects [9,10]: (1) small specific surface area; (2) scarce reaction active site; (3) insufficient visible light absorption (λ < 460 nm) ability and low quantum efficiency; and (4) high recombination rate of photo-generated electrons and holes. It is therefore highly desirable to develop novel synthetic strategies and methods to modify the g-C 3 N 4 structure and texture to enhance its photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Design and Architecture of P-O Co-Doped Porous g-C3N4 by Supramolecular Self-Assembly for Enhanced Hydrogen Evolution

et al. 2022

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A novel phosphorus and oxygen co-doped graphitic carbon nitride (sheetP-O-CNSSA) photocatalyst was successfully synthesized and applied for H2 evolution under visible light. In the synthesis process of sheetP-O-CNSSA, the supramolecular complex was developed by the self-assembly and copolymerization reaction among melamine, cyanuric acid (CA) and trithiocyanuric acid (TCA) to act as g-C3N4 precursors, while (NH4)2HPO4 was applied as P and O precursors for element doping. The chemical structures, morphologies, and optical properties of the sheetP-O-CNSSA were characterized by a series of measurements, i.e., XRD, FT-IR, SEM, TEM, UV-vis DRS, and PL. The results suggested that the introduction of P and O elements could enhance the separation and migration efficiency of photogenerated electrons and holes in the energy band of g-C3N4. The photocatalytic tests over Erythrosin B (EB) sensitized sheetP-O-CNSSA indicated that the hydrogen evolution was greatly enhanced compared with other catalysts and non-sensitized sheetP-O-CNSSA under visible light irradiation. Finally, a possible dye-sensitized photocatalysis mechanism was also proposed on the basis of the as-obtained results.

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Self-assembly of a g-C₃N₄-based 3D aerogel induced by N-modified carbon dots for enhanced photocatalytic hydrogen production

Abstract: The N-modified carbon dots/graphitic carbon nitride (NCDs/g-C3N4) aerogel was successfully prepared by simple electrostatic self-assembly of NCDs and g-C3N4 nanosheets without any harmful solvents or cross-linking agents. The prepared aerogel...

Cited by 26 publications

References 42 publications

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

In Situ Self-Assembled ZIF-67/MIL-125-Derived Co₃O₄/TiO₂ p–n Heterojunctions for Enhanced Photocatalytic CO₂ Reduction

Design and Architecture of P-O Co-Doped Porous g-C3N4 by Supramolecular Self-Assembly for Enhanced Hydrogen Evolution

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Self-assembly of a g-C3N4-based 3D aerogel induced by N-modified carbon dots for enhanced photocatalytic hydrogen production

Abstract: The N-modified carbon dots/graphitic carbon nitride (NCDs/g-C3N4) aerogel was successfully prepared by simple electrostatic self-assembly of NCDs and g-C3N4 nanosheets without any harmful solvents or cross-linking agents. The prepared aerogel...

Cited by 26 publications

References 42 publications

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

Au-Loaded Resorcinol–Formaldehyde Resin Photocatalysts: Hollow Sphere Structure Design and Localized Surface Plasmon Resonance Effect Synergistically Promote Efficient Nicotinamide Adenine Dinucleotide (NADH) Regeneration

In Situ Self-Assembled ZIF-67/MIL-125-Derived Co3O4/TiO2 p–n Heterojunctions for Enhanced Photocatalytic CO2 Reduction

Design and Architecture of P-O Co-Doped Porous g-C3N4 by Supramolecular Self-Assembly for Enhanced Hydrogen Evolution

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Product

Resources

About

Self-assembly of a g-C₃N₄-based 3D aerogel induced by N-modified carbon dots for enhanced photocatalytic hydrogen production

In Situ Self-Assembled ZIF-67/MIL-125-Derived Co₃O₄/TiO₂ p–n Heterojunctions for Enhanced Photocatalytic CO₂ Reduction