Green synthesis of g-C<sub>3</sub>N<sub>4</sub>-Pt catalyst and application to photocatalytic hydrogen evolution from water splitting

Zhang, Xingfeng; Qiu-jie, WU; Du, Zhongyi; Zheng, Yanmei; Li, Qingbiao

doi:10.1080/1536383x.2018.1469006

Cited by 20 publications

(6 citation statements)

References 27 publications

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“…Figure 5e shows the high resolution Pt 4f XPS spectrum with two distinct peaks at binding energy values of 73.0 and 76.41 eV, related to the Pt 4f 7/2 and Pt 4f 5/2 splitting orbital's, respectively. The difference in binding energy of these two peaks is 3.35 eV, reflecting the characteristic signal of metallic platinum (Pt 0 ) [47]. From FTIR spectra of the samples (Fig.…”

Section: Structural Morphology and Chemical Compositionmentioning

confidence: 96%

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

et al. 2021

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The photocatalytic performance of g-C3N4 for CO2 conversion is still inadequate by several shortfalls including the instability, insufficient solar light absorption and rapid charge carrier’s recombination rate. To solve these problems, herein, noble metals (Pt and Au) decorated Sr-incorporated g-C3N4 photocatalysts are fabricated via the simple calcination and photo-deposition methods. The Sr-incorporation remarkably reduced the g-C3N4 band gap from 2.7 to 2.54 eV, as evidenced by the UV–visible absorption spectra and the density functional theory results. The CO2 conversion performance of the catalysts was evaluated under visible light irradiation. The Pt/0.15Sr-CN sample produced 48.55 and 74.54 µmol h−1 g−1 of CH4 and CO, respectively. These amounts are far greater than that produced by the Au/0.15Sr-CN, 0.15Sr-CN, and CN samples. A high quantum efficiency of 2.92% is predicted for the Pt/0.15Sr-CN sample. Further, the stability of the photocatalyst is confirmed via the photocatalytic recyclable test. The improved CO2 conversion performance of the catalyst is accredited to the promoted light absorption and remarkably enhanced charge separation via the Sr-incorporated mid gap states and the localized surface plasmon resonance effect induced by noble metal nanoparticles. This work will provide a new approach for promoting the catalytic efficiency of g-C3N4 for efficient solar fuel production.

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Section: Structural Morphology and Chemical Compositionmentioning

confidence: 96%

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

et al. 2021

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“…Based on the obtained results, it was found that g-C 3 N 4 can stand high temperatures, even in an O 2 atmosphere. , In addition, the combined results from TGA and mass spectrometry supported that C-NH, NH 3 , and C 2 N 2 entities were the main thermal degradation species above 600 °C, with the absence of oxidized product including CO and CO 2 . , Therefore, the high thermal stability of g-C 3 N 4 can be obviously affected by addition of metals such Pt, Fe, Co, Ru, etc . or their oxides. ,− Sharma and Sasson have reported that the incorporation of Ru in g-C 3 N 4 has led to a decrease in the stability of g-C 3 N 4 . The as-prepared urea-derived g-C 3 N 4 material showed a thermal stability up to 500 °C under an air atmosphere; however, the thermal stability of ruthenium-loaded g-C 3 N 4 /Ru decreased to 420 °C .…”

Section: Characterization and Physicochemical Properties Of G-c3n4mentioning

confidence: 99%

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

2020

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Atomically 2D thin-layered structures, such as graphene nanosheets, graphitic carbon nitride nanosheets (g-C3N4), hexagonal boron nitride, and transition metal dichalcogenides are emerging as fascinating materials for a good array of domains owing to their rare physicochemical characteristics. In particular, graphitic carbon nitride has turned into a hot subject in the scientific community due to numerous qualities such as simple preparation, electrochemical properties, high adsorption capacity, good photochemical properties, thermal stability, and acid-alkali chemical resistance, etc. Basically, g-C3N4 is considered as a polymeric material consisting of N and C atoms forming a tri-s-triazine network connected by planar amino groups. In comparison with most C-based materials, g-C3N4 possesses electron-rich characteristics, basic moieties, and hydrogen-bonding groups owing to the presence of hydrogen and nitrogen atoms; therefore, it is taken into account as an interesting nominee to further complement carbon in applications of functional materials. Nevertheless, g-C3N4 has some intrinsic limitations and drawbacks mainly related to a relatively poor specific surface area, rapid charge recombination, a limited light absorption range, and a poor dispersibility in both aqueous and organic mediums. To overcome these shortcomings, numerous chemical modification approaches have been conducted with the aim of expanding the range of application of g-C3N4 and enhancing its properties. In the current review, the comprehensive survey is conducted on g-C3N4 chemical functionalization strategies including covalent and noncovalent approaches. Covalent approaches consist of establishing covalent linkage between the g-C3N4 structure and the chemical modifier such as oxidation/carboxylation, amidation, polymer grafting, etc., whereas the noncovalent approaches mainly consist of physical bonding and intermolecular interaction such as van der Waals interactions, electrostatic interactions, π–π interactions, and so on. Furthermore, the preparation, characterization, and diverse applications of functionalized g-C3N4 in various domains are described and recapped. We believe that this work will inspire scientists and readers to conduct research with the aim of exploring other functionalization strategies for this material in numerous applications.

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“…Graphitic carbon nitride has been known as a polymeric semiconductor with high chemical stability and a narrow band gap (∼2.7 eV, corresponding to an absorption edge of ≈460 nm), low cost, and ease of preparation. 20,21 C 3 N 4 has been applied for photocatalytic reactions, including water reduction/oxidation 22 and environmental treatment. 23–25 However, g-C 3 N 4 still has common issues during a photocatalytic process such as insufficient visible-light absorption, 26 low quantum yield and fast recombination of photogenerated carriers 27,28 that restrict the photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Constructing a rhenium complex supported on g-C₃N₄ for efficient visible-light-driven photoreduction of CO₂ to CO via a novel Z-scheme heterojunction

et al. 2023

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Green synthesis of g-C₃N₄-Pt catalyst and application to photocatalytic hydrogen evolution from water splitting

Cited by 20 publications

References 27 publications

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

Constructing a rhenium complex supported on g-C₃N₄ for efficient visible-light-driven photoreduction of CO₂ to CO via a novel Z-scheme heterojunction

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Green synthesis of g-C3N4-Pt catalyst and application to photocatalytic hydrogen evolution from water splitting

Cited by 20 publications

References 27 publications

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

Plasmon Assisted Highly Efficient Visible Light Catalytic CO2 Reduction Over the Noble Metal Decorated Sr-Incorporated g-C3N4

Emerging Chemical Functionalization of g-C3N4: Covalent/Noncovalent Modifications and Applications

Constructing a rhenium complex supported on g-C3N4 for efficient visible-light-driven photoreduction of CO2 to CO via a novel Z-scheme heterojunction

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Green synthesis of g-C₃N₄-Pt catalyst and application to photocatalytic hydrogen evolution from water splitting

Emerging Chemical Functionalization of g-C₃N₄: Covalent/Noncovalent Modifications and Applications

Constructing a rhenium complex supported on g-C₃N₄ for efficient visible-light-driven photoreduction of CO₂ to CO via a novel Z-scheme heterojunction