Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C<sub>3</sub>N<sub>4</sub> photocatalyst for coloured pollutant degradation

Yuan

et al. 2022

ACS Appl. Nano Mater.

In this research work, the ZIF-67-coupled plasmonic-gold-incorporated porous g-C3N4 (ZIF/Au-PCN) nanocomposites have been successfully synthesized and utilized for the conversion of CO2 into useful products and Bisphenol A (BPA) decontamination. Compared to pristine PCN, the photocatalytic activities of the most active 3ZIF/1.5Au-PCN nanocomposite are enhanced by 8.0-fold for the conversion of CO2 and by 2.5-fold for BPA degradation. On the basis of our experimental results, it is verified that the porous nature increases the surface area of g-C3N4. Remarkably, the incorporation of Au exceptionally adjusts the band gap of g-C3N4 from 2.7 to 2.48 eV via the surface plasmon resonance (SPR) effect, while the coupling of a metal–organic framework (MOF; ZIF-67) not only enhances the surface area but also prominently enhances the charge separation of g-C3N4 via a photoelectron modulation mechanism. In addition, transmission electron microscopy, scanning electron microscopy, photocurrent action spectroscopy, electrochemical impedance spectroscopy, time-resolved photoluminescence, fluorescence spectroscopy linked with •OH amount, Fourier transform infrared, Brunauer–Emmett–Teller, etc., confirmed that the insertion of a noble-metal Au atom and the fabrication of a MOF offered a suitable energy platform and improved the photocatalytic activities for BPA decontamination and CO2 conversion into valuable products. Moreover, on the basis of thermogravimetric analysis and stability tests, it is proven that the as-synthesized samples are highly stable and no morphological and physiochemical changes are observed before and after various analyses and photocatalytic reactions. Hence, our present research work will manifestly open an innovative gateway and feasible strategy to prepare MOF-supported and plasmonic-assisted g-C3N4-based porous and highly efficient photocatalysts for CO2 conversion and environmental protection.

Section: Resultsmentioning

confidence: 92%

Section: Exploring the Importance Of A Mof (Zif-67)mentioning

confidence: 89%

Graphitic Carbon Nitride Composites with Gold and ZIF-67 Nanoparticles as Visible-Light-Promoted Catalysts for CO₂ Conversion and Bisphenol A Degradation

Yuan

et al. 2022

ACS Appl. Nano Mater.

“…12,13 Furthermore, some new nanomaterials that have not yet been considered also may be developed with the improvements in nanotechnology. 14,15 Consequently, to construct efficient visible-light-driven H 2 -evolution systems that meet the demands of practical applications, it is crucial to design photocatalysts with rich active sites, low cost, large surface area, and good stability. 16 The introduction of cocatalysts has been proved to be an efficient way to construct high-efficiency photocatalysts because they can not only promote the rapid migration of electrons but also effectively capture and activate H + ions (or H 2 O molecules) on the photocatalyst surface.…”

Section: Introductionmentioning

confidence: 99%

Hollow ZnCdS and NiCoP Nanostructures for Photocatalytic Hydrogen Generation

Jin

Tsubaki

2022

ACS Appl. Nano Mater.

To promote photocatalytic reactions and sustain structural stabilities, nanostructured photocatalysts, particularly in hollow and/or framelike forms, have attracted great attention. The photocatalysts with hollow or framelike structures possess advantageous features for photocatalytic reactions with an enlarged accessible surface area, promoted light-response capability, and shortened charge-transfer distance. Here, two fresh hollow-structured nanomaterials, cubiclike ZnCdS (H-ZCS) and NiCoP (H-NCP) frameworks, were designed and synthesized for the first time based on Prussian blue analogues (PBAs) with an open framework structure, tunable compositions, and uniform metal active sites. They were coupled as advanced functional H-NCP/H-ZCS architectures with double-hollow nanostructures and close contact interfaces for an improved visible-light-driven H2 evolution. Interestingly, the two hollow-structured frameworks have the same start in preparation, that is, H-NCP and H-ZCS are two homologous hollow nanomaterials, which is undoubtedly beneficial for the design and construction of more advanced functional architectures based on the PBA-induction strategy. In addition, the newly developed cubiclike H-ZCS frameworks exhibit an enlarged surface area and narrower band gap in comparison with the reported ZCS nanoparticles. The resultant double-hollow H-NCP/H-ZCS architectures exhibit an enhanced photocatalytic H2 evolution rate, being up to about 73 μmol mg–1 h–1.

“…10–12 Organic dye molecules are challenging to spontaneously decay due to their bulky and complicated chemical structure. 13–15…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Organic dye molecules are challenging to spontaneously decay due to their bulky and complicated chemical structure. [13][14][15] Organic pollutant elimination is a well-established potential of photon-initiated oxidation processes, notably photocatalysis. [16][17][18][19][20] This method's notable benets include the utilization of inexpensive photons, mild working temperatures, nontoxic photocatalysts, and full mineralization.…”

Section: Introductionmentioning

confidence: 99%

Construction of a binary S-scheme S-g-C₃N₄/Co-ZF heterojunction with enhanced spatial charge separation for sunlight-driven photocatalytic performance

et al. 2022

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