In-situ nanoarchitectonics of noble-metal-free g-C3N4@C-Ni/Ni2P cocatalyst with core-shell structure for efficient photocatalytic H2 evolution

He, Youzhou; Jiang, Guangmei; Jiang, Yao; Tang, Lei; Zhang, Chenghua; Guo, Weiwei; Li, Fukun; You, Linfeng; Li, Siqi; Liu, Xingyan

doi:10.1016/j.jallcom.2021.162583

Cited by 24 publications

(7 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three primary peaks were observed meticulously centred at approximately 44.5°, 51.85°, and 76.39°. These peaks unambiguously align with the (111), (200), and (220) diffraction planes of hexagonal Ni, in perfect harmony with the JCPDS reference PDF #04-0850[59, 63, 64]. This revelation unveils the crystalline facets of the Ni-metal-g-C 3 N 4 composite.…”

supporting

confidence: 72%

“…These Ag particles, akin to the Ni counterparts, exhibit a consistent size pro le, typically falling within the range of 5 to 10 nm[58]. The amalgamation of both Ni and Ag particles signi es a signi cant advancement in the evolution of the original heterostructure, potentially fostering synergistic interactions that can enhance catalytic capabilities and offer promising outcomes in a remarkable impact on photocatalytic hydrogen generation [58,59]. Furthermore, we investigated photocatalytic hydrogen generation and meticulously examined various parameters.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

Rao,

hukwon,

Nagaveni

et al. 2024

Preprint

View full text Add to dashboard Cite

The advancement of photocatalysis relies on the development of novel hetero-structured materials with unique architectures. In this study, we successfully synthesized a hetero-structured g-C3N4 (GCN) material with a distinctive surface modification. To further enhance its photocatalytic performance, we optimized the Ag-Ni concentration to maximize the active sites for hydrogen evolution reactions. By using systematic physicochemical characterizations and density functional theory (DFT) calculations, we elucidated the pivotal role of graphitic carbon nitride (g-C3N4) in facilitating the formation of an efficient charge transfer channel and promoting the effective generation and separation of photo-generated carriers. From the DFT calculations, we also demonstrated that the Ag-Ni nanoparticles provide more efficient active sites than Ni nanoparticles for water splitting and hydrogen evolution and In-situ TEM exploration. Furthermore, the hetero microstructure consisting of thin g-C3N4 nano scrolls has a crucial role in shortening the migration distance of the carriers, effectively suppressing carrier recombination. Consequently, these extraordinary characteristics resulted in a superior solar light-driven photocatalytic H2 evolution rate of 2507 µmol h− 1 g− 1, surpassing the rate achieved by bulk g-C3N4 by a remarkable 18.6-folds. Moreover, the apparent quantum efficiency of this hetero-structured material reached an exceptional value of 1.6% under a 1.5 G air mass filter.

show abstract

supporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

Rao,

hukwon,

Nagaveni

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…As a noble metal-free material, g-C3N4 is gaining popularity among scientists. It offers several advantages, including chemical and thermal stability, affordability, the potential for negative reduction, and the capacity to run on solar energy [4,5]. However, it has significant drawbacks, such as a small, exposed surface area, a compact layered structure, and a greater rate of photoinduced charge carrier recombination [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

Tahir,

Hamouda,

Hassanr

2023

International Conference of Recent Trends in Environmental Science and Engineering

View full text Add to dashboard Cite

Recently, there has been a growing interest in relying on photocatalytic technology for producing renewable fuels such as hydrogen and other environmental applications. The success of photocatalysis, however, requires developing visible light-responsive photocatalysts for the continuous production of H2 and other value-added chemicals. Graphitic carbon nitride (g-C3N4) is a promising material but has diminished photocatalytic ability. This work aims to design and develop visible light responsive g-C3N4 using a singlestep hydrothermal approach. The g-C3N4 was prepared through the thermal decomposition of melamine (named g-C3N4-M), urea (named g-C3N4-U), and a mixture of melamine-urea (named g-C3N4-MU). The samples were characterized using X-ray diffraction (XRD), UVvisible, and photoluminescence to assess the successful conversion to g-C3N4. XRD results revealed that urea was not successfully converted to g-C3N4; however, melamine was fully converted to g-C3N4. Interestingly, when melamine and urea were mixed as a fixed bed, the mix was successfully converted to defective g-C3N4. Visible light responsiveness was confirmed by the results of UV-visible analysis for all three materials. In the case of melamine, a higher visible light response was obtained (~482 nm), whereas g-C3N4-MU had slightly lower visible light absorption (~ 471 nm) due to the interaction of defects within the surface. These findings were further confirmed through photoluminescence analysis. The highest charge carrier recombination was obtained using g-C3N4-M, whereas charge separation was improved in the g-C3N4-U sample due to the presence of g-C3N4 composites and other intermediates. The highest charge separation ability was achieved for the g-C3N4-MU. This revealed that mixing melamine and urea is a promising approach for the singlestep synthesis of defective g-C3N4 with a higher ability for visible light absorption and photoinduced charge carrier separation. The findings of this work would be beneficial in different areas, such as solar energy conversion, greenhouse gas reduction, and wastewater degradation.

show abstract

“…In addition, cocatalyst loading, such as Ni 2 P, [ 14 ] CuS, [ 15 ] CoP, [ 16 ] and Pt, [ 17 ] is an efficient strategy to promote the H 2 evolution rate as they can provide more reactive sites, accelerate the transfer and separation of carriers, and reduce hydrogen overpotential. Metal phosphides are usually used as promising alternatives to precious metals for photocatalytic H 2 production due to their low hydrogen overpotential, tunable electronic structure, excellent electrical conductivity, and low price.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of Sulfur Vacancies and Dislocations in Mn_0.3Cd_0.7S Nanorods with Modification of Co₂P toward Photocatalytic H₂ Evolution

et al. 2022

View full text Add to dashboard Cite

Defect engineering and cocatalyst loading are effective methods to modify semiconductors to improve their catalytic activity and stability. Herein, sulfur vacancies and dislocations in Mn0.3Cd0.7S nanorods are manipulated by regulating the amount of the sulfur source. After the introduction of Co2P, the maximum H2 production rate for Co2P/Mn0.3Cd0.7S can reach up to 245.3 μmol h−1, ≈2,700 times higher than that of Mn0.3Cd0.7S at the optimal contents of sulfur vacancies and dislocations. The sulfur vacancies serve as the trap sites of electrons and the dislocations might create new transfer channels for carriers, inducing the improvement of catalytic activity and stability.

show abstract

In-situ nanoarchitectonics of noble-metal-free g-C3N4@C-Ni/Ni2P cocatalyst with core-shell structure for efficient photocatalytic H2 evolution

Cited by 24 publications

References 61 publications

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

Manipulation of Sulfur Vacancies and Dislocations in Mn_0.3Cd_0.7S Nanorods with Modification of Co₂P toward Photocatalytic H₂ Evolution

Contact Info

Product

Resources

About

In-situ nanoarchitectonics of noble-metal-free g-C3N4@C-Ni/Ni2P cocatalyst with core-shell structure for efficient photocatalytic H2 evolution

Cited by 24 publications

References 61 publications

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

Tailoring Schottky Barriers and Active Sites in Bi-metallic Cluster Mesoporous Carbon Nitride Heterostructures nanocomposite for Hydrogen Evolution with In-situ insights

A Single-Step Synthesis of Defective Graphitic Carbines from Melamine and Urea for Photocatalytic Applications

Manipulation of Sulfur Vacancies and Dislocations in Mn0.3Cd0.7S Nanorods with Modification of Co2P toward Photocatalytic H2 Evolution

Contact Info

Product

Resources

About

Manipulation of Sulfur Vacancies and Dislocations in Mn_0.3Cd_0.7S Nanorods with Modification of Co₂P toward Photocatalytic H₂ Evolution