Enhanced photocatalytic hydrogen evolution by carbon-doped carbon nitride synthesized via the assistance of cellulose

Deng, Puhui; Li, Haiyan; Wang, Zidong; Hou, Yu

doi:10.1016/j.apsusc.2019.144454

Cited by 20 publications

(8 citation statements)

References 35 publications

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“…With increasingly serious environmental and energy issues, it has become urgent to explore environmentally friendly, economical, and renewable alternative energy sources to promote future sustainable development. Hydrogen, as a nonpolluting, high-energy-density energy source, is expected to replace fossil energy as a clean energy source in the future. − Light-driven photocatalytic water splitting is one of the most attractive methods for the sustainable production of hydrogen. Among the widely studied photocatalysts, graphitic carbon nitride (g-C 3 N 4 ) has attracted considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Wang

et al. 2020

ACS Omega

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Photocatalytic decomposition of water is the most attractive method for the sustainable production of hydrogen, but the development of a highly active and low-cost catalyst remains a major challenge. Here, we report the preparation of LaCoO 3 /g-C 3 N 4 nanosheets and the utilization of LaCoO 3 instead of noble metals to improve the photocatalytic activity for the production of hydrogen. First, LaCoO 3 was successfully prepared by the sol−gel method, and then a series of highly efficient Z-scheme LaCoO 3 /g-C 3 N 4 heterojunction photocatalysts were synthesized by the solvothermal method. Various characterization techniques (X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), ultraviolet−visible (UV−vis) diffuse reflectance spectroscopy (DRS), photoluminescence (PL), transient photocurrent response test, electron paramagnetic resonance (EPR)) confirm that the heterostructure and interfacial interaction had been formed between LaCoO 3 nanoparticles and g-C 3 N 4 nanosheets. In the photocatalytic water splitting test, LaCoO 3 /g-C 3 N 4 -20 wt % exhibited the highest photocatalytic activity of 1046.15 μmol h −1 g −1 , which is 3.5 and 1.4 times higher than those of LaCoO 3 and g-C 3 N 4 , respectively. This work leads to an inexpensive and efficient LaCoO 3 /g-C 3 N 4 photocatalysis system for water splitting or other photocatalytic applications.

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Section: Introductionmentioning

confidence: 99%

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Wang

et al. 2020

ACS Omega

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“…However, another peak at 288.52 eV appeared for CN-25, which was attributed to the C–O, resulting from oxygen doping into the C 3 N 4 heterocycles . The N 1s spectra (Figure f) could be deconvoluted into three peaks centered at 398.03, 399.48, and 400.52 eV, which could be indexed to s -triazine rings (CNC, N–C 3 ) and amino groups (C–N–H), respectively . After steam activation, the O-element concentration of CN-25 was increased from 1.83 to 3.61%.…”

Section: Resultsmentioning

confidence: 98%

“…The surface area corresponding to the active site is one of the key factors to improving photocatalytic activity. 41 The increased BET surface area, pore volumes, and average pore size could produce more reaction sites for reactants, which was conducive to photocatalytic performance. 42 From the C1s spectra (Figure 2e), it could be deconvoluted into two peaks near 284.6 and 288.22 eV, corresponding to the C−C and sp 2 -hybridized N�C�N of CN, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…From the pore size distribution curves (Figure d), it could be found that CN- X had a much more abundant pore size distribution in the range of 2–20 nm than CN. The surface area corresponding to the active site is one of the key factors to improving photocatalytic activity . The increased BET surface area, pore volumes, and average pore size could produce more reaction sites for reactants, which was conducive to photocatalytic performance …”

Section: Resultsmentioning

confidence: 99%

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Vacancy-Modified Porous g-C₃N₄ Nanosheets Controlled by Physical Activation for Highly Efficient Visible-Light-Driven Hydrogen Evolution and Organics Degradation

et al. 2023

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As a promising photocatalyst material, g-C 3 N 4 has great application potential in energy production and environmental improvement. In this work, surface-modified g-C 3 N 4 nanosheets with excellent stability and high photocatalytic activity were successfully synthesized by physical steam activation. The charge transfer rate of carbon nitride was improved due to the synergistic effect of nitrogen defect and oxygen doping caused by steam activation. Meanwhile, the specific surface area and pore volume of the optimized sample reached 124.3 m 2 g −1 and 0.42 cm 3 g −1 , respectively, which increased the exposed reaction sites of reactants, enhancing the photocatalytic activity of g-C 3 N 4 . In addition, this novel g-C 3 N 4 displayed a great H 2 evolution rate of 5889.39 μmol h −1 g −1 with a methylene blue degradation rate up to 6.52 × 10 −3 min −1 , which was 3.7 and 2.1 times of original g-C 3 N 4 , respectively. This study provided a simple and economical method to develop a highly efficient g-C 3 N 4 photocatalyst for solar energy conversion.

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“…Graphitic carbon nitrides which were doped with non-metal elements like oxygen [19] , [20] , nitrogen [21] , [22] , [23] , carbon [24] , [25] and phosphorus [26] , [27] , were reported to substitute the original atoms in the 2D carbon nitride framework and altered g-C 3 N 4 ′s electronic structure. Sulfur-doped g-C 3 N 4 prepared by treating the g-C 3 N 4 powder in a gaseous H 2 S atmosphere or by thermolysis of thiourea was demonstrated by Liu et al [28] and Wang et al [29] .…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic-assisted synthesis of porous S-doped carbon nitride ribbons for photocatalytic reduction of CO2

Wang

Zhi-qiang

2023

Ultrasonics Sonochemistry

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Enhanced photocatalytic hydrogen evolution by carbon-doped carbon nitride synthesized via the assistance of cellulose

Cited by 20 publications

References 35 publications

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Vacancy-Modified Porous g-C₃N₄ Nanosheets Controlled by Physical Activation for Highly Efficient Visible-Light-Driven Hydrogen Evolution and Organics Degradation

Ultrasonic-assisted synthesis of porous S-doped carbon nitride ribbons for photocatalytic reduction of CO2

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Enhanced photocatalytic hydrogen evolution by carbon-doped carbon nitride synthesized via the assistance of cellulose

Cited by 20 publications

References 35 publications

Z-Scheme LaCoO3/g-C3N4 for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Z-Scheme LaCoO3/g-C3N4 for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Vacancy-Modified Porous g-C3N4 Nanosheets Controlled by Physical Activation for Highly Efficient Visible-Light-Driven Hydrogen Evolution and Organics Degradation

Ultrasonic-assisted synthesis of porous S-doped carbon nitride ribbons for photocatalytic reduction of CO2

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Product

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About

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Z-Scheme LaCoO₃/g-C₃N₄ for Efficient Full-Spectrum Light-Simulated Solar Photocatalytic Hydrogen Generation

Vacancy-Modified Porous g-C₃N₄ Nanosheets Controlled by Physical Activation for Highly Efficient Visible-Light-Driven Hydrogen Evolution and Organics Degradation