Low-cost Ni-complex/graphitic carbon nitride photocatalyst for hydrogen evolution

Kalousek, Vít; Kikuta, Kazuhiro; Vagvala, Tarun Chand; Ikeue, Keita

doi:10.1016/j.matlet.2017.04.043

Cited by 16 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure a, pristine g-C 3 N 4 and UNG-25.0 composite exhibited the same UV–vis absorption peak near 450 nm, matching to the intrinsic band gap of g-C 3 N 4 ascribed to π–π* transitions in the heterocyclic ring. , Also, the UNiMOF only absorbed the UV–vis light before 350 nm. The band gap of samples is also shown in Figure a.…”

Section: Resultsmentioning

confidence: 60%

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

Cao

Zhang

Wang

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

On the basis of ultrathin two-dimensional (2D) nickel metal organic framework (UNiMOF) nanoflakes and 2D g-C3N4 nanoflakes, fresh visible-light-driven 2D/2D heterostructure catalysts were designed, which were assembled with a simplistic electrostatic self-assembly process. The photocatalytic performance of UNiMOF/g-C3N4 for H2 production was evaluated in visible light. The hydrogen evolution of 25.0% UNiMOF/g-C3N4 (UNG-25.0) heterojunction was 20.03 μmol h–1, which was greater than that of pure g-C3N4. In addition, the UNG composites also presented more excellent photocatalytic activity than that of bulk NiMOF/g-C3N4 (BNG) hybrid. This enhanced performance may depend on cooperative potentiation between UNiMOF and g-C3N4 efficiently lowering recombination of carriers. This work showed that constructing 2D–2D heterojunctions provides a feasible approach to obtain highly capable catalysts for photocatalytic decomposition of water.

show abstract

Section: Resultsmentioning

confidence: 60%

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

Cao

Zhang

Wang

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…It is obvious that NiO 10.0 /CN450 composite exhibited the best H 2 evolution activities, which is higher than some of the other photocatalysts (Table ). Moreover, all photocatalysts show quite a low photocatalytic activities at the first hour because of an induction period in the initial step of the photocatalytic test …”

Section: Resultsmentioning

confidence: 91%

Nickel Ammine Complex‐derived NiO Modified g‐C₃N₄ Composites with Enhanced Visible‐light Photocatalytic H₂ Evolution Performance

Shi

Bai

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

In this paper, NiO/g‐C3N4 (NiO/CN) composites were successfully prepared by the wetness impregnation method using nickel ammine complex solution as NiO source. As photocatalysts, NiO/CN composites showed enhanced visible‐light photocatalytic hydrogen evolution activities in the presence of triethanolamine as sacrificial agent. The effects of NiO content and annealing temperature for NiO/CN composites on the photocatalytic H2 evolution activities were investigated. Furthermore, NiO/CN composite with 10.0% NiO content after annealing at 450 °C exhibited optimal photocatalytic H2 evolution rate of 90.05 μmol⋅h−1⋅g−1 which is about 17 times higher than that of pristine CN (5.22 μmol⋅h−1⋅g−1). Moreover, the experimental results demonstrated that amorphous NiO as co‐catalyst not only offered active sites for H2 evolution but also benefited the efficient separation of the photogenerated charge carries. In addition, NiO/CN composite displayed the superior photocatalytic stability during the photocatalytic process.

show abstract

“…A nickel complex containing a GC catalyst was prepared by Zhang and co-workers and showed the highest H 2 evolution of 524.1 μmol g –1 h –1 . A nickel–mercaptoethanol complex was grafted onto GC by Kalousek et al showing higher H 2 evolution than GC . Similarly Ni(dmgH) 2 was immobilized onto GC and showed higher H 2 evolution .…”

Section: Introductionmentioning

confidence: 99%

“…33 A nickel−mercaptoethanol complex was grafted onto GC by Kalousek et al showing higher H 2 evolution than GC. 34 Similarly Ni(dmgH) 2 was immobilized onto GC and showed higher H 2 evolution. 35 A comparison of metal complex−GC based catalysts was performed by Dong and co-workers which proved that nickel-based complexes showed higher H 2 evolution than similar Co-and Fe-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Metal Complex and Dual Doped Graphitic Carbon Nitride for Superior Photocatalytic Hydrogen Evolution

et al. 2021

View full text Add to dashboard Cite

The feeble photoinduced charge separation ability of pristine graphitic carbon nitride largely reduces its photocatalytic hydrogen evolution and thereby limits its practical application. Herein to increase effective charge separation in the graphitic carbon nitride system, consecutive modifications have been made with dual doping of sodium and sulfur followed by grafting of a VO(acac)2 complex. The efficient doping and subsequent grafting in the novel photocatalyst VNS-GC was verified by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy, high resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. A higher absorbance intensity and lower band gap, photoluminescence intensity, and EIS spectrum ensure a more elevated photocatalytic efficiency in VNS-GC than pristine graphitic carbon nitride (GC). The greater efficiency of the as-synthesized catalyst over bulk GC was experimentally employed through photocatalytic hydrogen production. It was found that the H2 production using VNS-GC was at 310.63 μmol g–1 h–1 which was 4.3 times higher than that with GC. A higher photocatalytic H2 evolution efficiency was predominantly attributed to the lower recombination rate of the charge carriers as is also evident from TR-PL and Nquist plots, thus overcoming the structural limitations in GC. Moreover, the VNS-GC catalyst was also found to have good stability through repeated cycles of experiments.

show abstract

Low-cost Ni-complex/graphitic carbon nitride photocatalyst for hydrogen evolution

Cited by 16 publications

References 13 publications

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

Nickel Ammine Complex‐derived NiO Modified g‐C₃N₄ Composites with Enhanced Visible‐light Photocatalytic H₂ Evolution Performance

Synergistic Effect of Metal Complex and Dual Doped Graphitic Carbon Nitride for Superior Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

Low-cost Ni-complex/graphitic carbon nitride photocatalyst for hydrogen evolution

Cited by 16 publications

References 13 publications

2D–2D Heterostructured UNiMOF/g-C3N4 for Enhanced Photocatalytic H2 Production under Visible-Light Irradiation

2D–2D Heterostructured UNiMOF/g-C3N4 for Enhanced Photocatalytic H2 Production under Visible-Light Irradiation

Nickel Ammine Complex‐derived NiO Modified g‐C3N4 Composites with Enhanced Visible‐light Photocatalytic H2 Evolution Performance

Synergistic Effect of Metal Complex and Dual Doped Graphitic Carbon Nitride for Superior Photocatalytic Hydrogen Evolution

Contact Info

Product

Resources

About

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

Nickel Ammine Complex‐derived NiO Modified g‐C₃N₄ Composites with Enhanced Visible‐light Photocatalytic H₂ Evolution Performance