A mechanochemically prepared graphdiyne (CnH2n−2) based Cu3P@GDY p–n heterojunction for efficient photocatalytic hydrogen evolution

Jin, Zhiliang; Yang, Mengxue; Fan, Zhaobo; Li, Youji

doi:10.1039/d2se00739h

Cited by 6 publications

(4 citation statements)

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“…In Figure e, the FTIR spectrum of Pyr-GDY shows a broad peak at 1400–1500 cm –1 , which corresponds to the vibration of the carbon–carbon double bond in the benzene ring of Pyr-GDY . In addition, the peak at 2077 cm –1 corresponds to the stretching vibration peak of the acetylene bond . The zeta potential test spectra of Pyr-GDY, CdS, CeO 2 , CdS/Pyr-GDY-10%, and CPGC-15% are presented in Figure f, and the ζ potential values are 34.9, 4.6, −33.1, 8.6, and 5.3 mV, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…41 In addition, the peak at 2077 cm −1 corresponds to the stretching vibration peak of the acetylene bond. 42 The zeta potential test spectra of Pyr-GDY, CdS, CeO 2 , CdS/Pyr-GDY-10%, and CPGC-15% are presented in Figure 1f, and the ζ potential values are 34.9, 4.6, −33.1, 8.6, and 5.3 mV, respectively. The positive and negative potential relationship between CeO 2 and CdS/Pyr-GDY indicates that they are electrostatically self-assembled together, which benefits the stability of the material.…”

Section: Xrd Ftir Raman and ζmentioning

confidence: 99%

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Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Liu,

Fan,

Sun

et al. 2023

ACS Appl. Energy Mater.

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Graphdiyne, a member of the carbon family, has unique physical and chemical properties due to its structural advantages and has been applied in many fields. Recently, it has shown high research value in the direction of photocatalysis hydrogen separation. Herein, we report a type of two-dimensional pyrenyl graphdiyne (Pyr-GDY) using 1,3,6,8-tetrabromopyrene and CaC 2 as reaction substrates for the first time by means of mechanical ball-milling and constructed an S-scheme heterojunction with CdS to achieve spatial separation of an electron− hole, and coupled CeO 2 as a cocatalyst to effectively retard the photocorrosion of CdS. The hydrogen evolution rate of the ternary composite catalyst CdS/Pyr-GDY-CeO 2 -15% (CPGC-15%) in a lactic acid solution is 21.16 mmol g −1 h −1 , which is 7.6 times that of pure CdS and 998.1 times that of pure Pyr-GDY. The successful construction of an S-scheme heterojunction between CdS and Pyr-GDY is verified by in situ XPS analysis. The introduction of Pyr-GDY enhances the absorbance of materials in the near-infrared spectrum, which is beneficial for CPGC-15% to absorb photons. Furthermore, CPGC-15% has low resistance and strong photoelectric response ability, which is beneficial for preventing the recombination of electron−hole pairs. This work provides a method for the preparation of Pyr-GDY and shows a bright prospect in the field of photocatalysis hydrogen separation.

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Section: Resultsmentioning

confidence: 97%

Section: Xrd Ftir Raman and ζmentioning

confidence: 99%

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Liu,

Fan,

Sun

et al. 2023

ACS Appl. Energy Mater.

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“…The two strong peaks are attributed to the respiration vibration of the sp 2 carbon domain of the aromatic ring (D band) structure (1363.83 cm −1 ). The stretching vibration of the sp 2 carbon domain of the aromatic ring (G band) (1566.94 cm −1 ), which belong to the first‐order scattering of the E2 g model [36] . In addition, two weak peaks (1999 cm −1 and 2178 cm −1 ) are specific to the vibration of the conjugated double acetylene chain (−C≡C−C≡C−) [37] …”

Section: Resultsmentioning

confidence: 99%

“…The stretching vibration of the sp 2 carbon domain of the aromatic ring (G band) (1566.94 cm À 1 ), which belong to the first-order scattering of the E2 g model. [36] In addition, two weak peaks (1999 cm À 1 and 2178 cm À 1 ) are specific to the vibration of the conjugated double acetylene chain (À C�CÀ C�CÀ ). [37]…”

Section: Xrd Ft-ir and Raman Spectra Analysismentioning

confidence: 99%

Graphdiyne(C_nH_2n‐2)‐Based NiCo LDH – Graphdiyne – CuI Double S‐Scheme Heterojunction For Efficient Photocatalytic Hydrogen Production**

et al. 2022

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Graphdiyne (GDY), a new two‐dimensional carbon isomer material, has received much attention due to its excellent properties, but has been less applied in the field of photocatalytic hydrogen production. Different from the conventional method, in this paper, GDY−CuI binary heterojunctions are prepared by the one‐pot method, and then GDY−CuI is combined with different morphologies of NiCoLDH (NiCoLDH‐F and NiCoLDH‐R; LDH=layered double hydroxide) through morphology modulation to form NiCoLDH−CuI−GDY double S‐scheme heterojunction catalysts. On the one hand, NiCoLDH could provide sufficient anchor sites for GDY−CuI, which is conducive to the separation and transport of electrons at the contact interface and provides abundant reaction sites for the hydrogen precipitation reaction. NiCoLDH in the form of nanorods is more stable and provides more active sites for hydrogen precipitation than NiCoLDH in the form of nanoflowers. On the other hand, the construction of double S‐scheme heterojunctions can promote electron transfer and exhibit strong redox ability in photocatalytic reactions, so the hydrogen precipitation activity is enhanced. Most importantly, both NiCoLDH‐F−CuI−GDY (12.09 μmol ⋅ h−1) and NiCoLDH‐R−CuI−GDY (13.47 μmol ⋅ h−1) exhibited excellent hydrogen precipitation activity. This experiment provides a new strategy for the construction of an efficient and environmentally friendly multicatalytic system.

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Calcium Carbide (CaC₂) as a C₂‐Synthon by Mechanochemistry

Cortés‐Lobo,

Hernández

2024

ChemPlusChem

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Mechanochemical reactions by ball milling have opened new avenues in chemical synthesis. Particularly, mechanochemistry has facilitated the reaction of insoluble materials to simplify stablished synthetic protocols and develop new ones. One notable application involves the use of calcium carbide (CaC2) as a C2‐synthon through mechanochemistry, which has offered a more practical alternative to incorporate C2‐units compared to the conventional use of highly flammable gaseous acetylene. For example, by ball milling the acetylenic anions [C2]2– found in CaC2 have been harnessed for the synthesis of diverse functional carbon materials as well as discrete organic molecules. This Concept aims to contribute to the conceptualization of this innovative approach, while highlighting both its advantages and the challenges inherent in the use of CaC2.

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A mechanochemically prepared graphdiyne (C_nH_2n−2) based Cu₃P@GDY p–n heterojunction for efficient photocatalytic hydrogen evolution

Abstract: As an allotrope of carbon, Graphdiyne (CnH2n-2, GDY) is a two-dimensional carbon net structure composed of sp and sp2 hybrids. GDY has received a lot of attention for its excellent...

Cited by 6 publications

References 82 publications

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Graphdiyne(C_nH_2n‐2)‐Based NiCo LDH – Graphdiyne – CuI Double S‐Scheme Heterojunction For Efficient Photocatalytic Hydrogen Production**

Calcium Carbide (CaC₂) as a C₂‐Synthon by Mechanochemistry

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A mechanochemically prepared graphdiyne (CnH2n−2) based Cu3P@GDY p–n heterojunction for efficient photocatalytic hydrogen evolution

Abstract: As an allotrope of carbon, Graphdiyne (CnH2n-2, GDY) is a two-dimensional carbon net structure composed of sp and sp2 hybrids. GDY has received a lot of attention for its excellent...

Cited by 6 publications

References 82 publications

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO2, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO2, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Graphdiyne(CnH2n‐2)‐Based NiCo LDH – Graphdiyne – CuI Double S‐Scheme Heterojunction For Efficient Photocatalytic Hydrogen Production**

Calcium Carbide (CaC2) as a C2‐Synthon by Mechanochemistry

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A mechanochemically prepared graphdiyne (C_nH_2n−2) based Cu₃P@GDY p–n heterojunction for efficient photocatalytic hydrogen evolution

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Mechanochemical Synthesis of Pyrenyl Graphdiyne Coupling CdS/CeO₂, Constructing a Ternary Photocatalyst toward Efficient Hydrogen Evolution

Graphdiyne(C_nH_2n‐2)‐Based NiCo LDH – Graphdiyne – CuI Double S‐Scheme Heterojunction For Efficient Photocatalytic Hydrogen Production**

Calcium Carbide (CaC₂) as a C₂‐Synthon by Mechanochemistry