Two-dimensional porous sheet-like carbon-doped ZnO/g-C3N4 nanocomposite with high visible-light photocatalytic performance

Qin, Jiaqian; Yang, Chengwu; Cao, Meng; Zhang, Xinyu; Rajendran, Saravanan; Limpanart, Sarintorn; Ma, Mingzhen; Liu, Riping

doi:10.1016/j.matlet.2016.12.007

Cited by 109 publications

(28 citation statements)

References 17 publications

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“…The C1s core level spectrum of pure g‐C 3 N 4 contained three peaks. The main chemical state of C 1s was at a binding energy of 288.3 eV, which belonged to the sp 2 bonded C (N−C=N) in the s ‐triazine rings . The peak at 284.8 eV was associated with the adventitious carbon, whereas the peak centered at 286 eV was assigned to the C−NH 2 species on the g‐C 3 N 4 .…”

Section: Resultsmentioning

confidence: 99%

Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

et al. 2018

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The construction of a 2D–2D heterostructured composite is an efficient method to improve the photocatalytic hydrogen generation capability under visible light. In this work, simple heat treatment of a mixture of g‐C3N4 and delaminated Ti3C2 was used to prepare a series of d‐Ti3C2/TiO2/g‐C3N4 nanocomposites. The d‐Ti3C2 not only acted as the support layer and resource to glue the anatase TiO2 particles and g‐C3N4 layers together but also served as the fast electron transfer channel to improve the photogenerated charge carriers’ separation efficiency. By tuning the g‐C3N4/d‐Ti3C2 mass ratio, heating temperature and soaking time, the d‐Ti3C2/TiO2/g‐C3N4 nanocomposite 4‐1‐350‐1 achieved an excellent H2 evolution rate of 1.62 mmol h−1 g−1 driven by a 300 W Xe lamp with a 420 nm cutoff filter. The heterostructured composite photocatalyst was stable even after 3 cycles, representing excellent potential for the practical application in solar energy conversion.

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Section: Resultsmentioning

confidence: 99%

Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

et al. 2018

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“…[15] prepared MnO@MnOx microspheres through the solvothermal process and reported the degradation of levofloxacin under simulated sunlight irradiation. Nanocomposite photocatalytic technology can be considered a green technology and provides the advantages of abundance, including postpone electron-hole recombination, higher photocatalytic activity, and the ability to convert solar energy to chemical energy, which eventually realizes the solution of energy and environmental issues [16][17][18][19][20][21].ZnO is an n-type semiconductor, having a conductivity of about 10 −7 -10 −3 S/cm. It has a relatively large binding energy of 60 meV.…”

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Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

et al. 2019

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CuO/ZnO composites are synthesized using a simple mechanochemical combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared (FTIR) are used to characterize the prepared oxides. X-ray diffraction reveals that the prepared CuO/ZnO exhibit a wurtzite ZnO crystal structure and the composites are composed of CuO and ZnO. The strong peaks of the Cu, Zn, and O elements are exhibited in the EDX spectrum. The FTIR spectra appear at around 3385 cm −1 and 1637 cm −1 , caused by O-H stretching, and 400 cm −1 to 590 cm −1 , ascribable to Zn-O stretching. The photocatalytic performances of CuO/ZnO nanocomposites are investigated for the degradation of methylene blue (MB) aqueous solution in direct solar irradiation. The degradation value of MB with 5 wt % CuO/ZnO is measured to be 98%, after 2 h of solar irradiation. The reactive • O 2 − and • OH radicals play important roles in the photodegradation of MB. Mineralization of MB is around 91% under sunlight irradiation within 7 h. The photodegradation treatment for the textile wastewater using sunlight is an easy technique-simply handled, and economical. Therefore, the solar photodegradation technique may be a very effective method for the treatment of wastewater instead of photodegradation with the artificial and expensive Hg-Xe lamp.methyl orange. Kuriakose et al. [14] prepared CuO/ZnO nanocomposites using the carbothermal evaporation method and evaluated the photocatalytic degradation of methylene blue and methyl orange dyes under sunlight irradiation. Wang el al. [15] prepared MnO@MnOx microspheres through the solvothermal process and reported the degradation of levofloxacin under simulated sunlight irradiation. Nanocomposite photocatalytic technology can be considered a green technology and provides the advantages of abundance, including postpone electron-hole recombination, higher photocatalytic activity, and the ability to convert solar energy to chemical energy, which eventually realizes the solution of energy and environmental issues [16][17][18][19][20][21].ZnO is an n-type semiconductor, having a conductivity of about 10 −7 -10 −3 S/cm. It has a relatively large binding energy of 60 meV. However, the main disadvantages of ZnO are its fast electron-hole recombination rate and inefficient utilization of sunlight that lead to a reduction in photodegradation efficiency. The photodegradation performance of ZnO can be increased by modifying ZnO with transition metals [22]. Among the various transition metals, Cu-doped ZnO nanomaterials are of special interest due to the photocatalytic efficiency enhancement that creates defects in the lattice and reduces the recombination of photogenerated charge carriers [23]. Cu also provides plenty of advantages, such as low cost, more electronegativity than zinc, and a similar atomic size to that of zinc, and leads to better doping efficiency [24]. CuO is a natural p-type semiconductor with a narrow band gap, having a conductivity of 10 −4 ...

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“…Therefore, researchers are interested to achieve aforesaid parameters and synthesized ZnO nanomaterials by diverse methods such as metal-nonmetal doping, surface modification via organic materials, combining semiconductor oxide nanoparticles with conducting polymers, irradiation source, pH, addition of carboxylic compounds, distinct composites with ZnO/TiO 2 /GO, using various surfactant for different morphology (template method), etc. to degrade highly toxic dyes [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Development of oxygen vacancies and surface defects in Mn-doped ZnO nanoflowers for enhancing visible light photocatalytic activity

et al. 2020

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Pure and Mn-doped ZnO nanoflowers were successfully synthesized by the hydrothermal technique. Doping of Mn into ZnO lattice exhibits formation of oxygen vacancies and surface modifications into ZnO lattice was investigated by XPS spectra and AFM analysis. During the photocatalytic performance, vacancies create the trap centers for photogenerated electrons hence the electron-hole recombination is effectively inhibited. These formed oxygen vacancies along with enhanced surface area are due to Mn doping, resulted in effective photodegradation of methylene blue solution under solar light irradiation. The degradation efficiency for methylene blue dye exceeds 82% after 120 min under solar light irradiation, also the catalytic performance of Mn-doped ZnO nanoflowers retains even after 4 cycles.

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Two-dimensional porous sheet-like carbon-doped ZnO/g-C3N4 nanocomposite with high visible-light photocatalytic performance

Cited by 109 publications

References 17 publications

Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

Development of oxygen vacancies and surface defects in Mn-doped ZnO nanoflowers for enhancing visible light photocatalytic activity

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Two-dimensional porous sheet-like carbon-doped ZnO/g-C3N4 nanocomposite with high visible-light photocatalytic performance

Cited by 109 publications

References 17 publications

Heterostructured d‐Ti3C2/TiO2/g‐C3N4 Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

Heterostructured d‐Ti3C2/TiO2/g‐C3N4 Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

Development of oxygen vacancies and surface defects in Mn-doped ZnO nanoflowers for enhancing visible light photocatalytic activity

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Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity

Heterostructured d‐Ti₃C₂/TiO_2/g‐C₃N₄ Nanocomposites with Enhanced Visible‐Light Photocatalytic Hydrogen Production Activity