Facile synthesis of black N-TiO2 / N-RGO nanocomposite for hydrogen generation and electrochemical applications: New insights into the structure-performance relationship

Ida, Shintaro; Justin, S.J. Samuel; Wilson, P.; Neppolian, Bernaurdshaw

doi:10.1016/j.apsadv.2022.100249

Cited by 12 publications

(2 citation statements)

References 68 publications

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“…The splitting energy of 5.66 eV confirms the presence of the Ti 4+ oxidation state between the two peaks [ 25 ]. The BE of 529.70 eV corresponding to O (1S) from the deconvoluted O (1s) XPS spectrum ( Figure 3 d) confirms the Ti–O–Ti chemical bonding in the synthesized material [ 26 ]. The decomposed XPS spectrum of Au (4f) ( Figure 3 c) was also studied to establish the presence of Au colloids in the synthesized nanosheets.…”

Section: Resultsmentioning

confidence: 71%

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Usman

Cursaru

Branoiu

et al. 2022

Gels

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A sol–gel synthesis technique was employed for the preparation of anatase phase {001}-TiO2/Au hybrid nanocomposites (NCs). The scalable, schematic, and cost-efficient method was successfully modified using HF and NH4OH capping agents. The photocatalytic activity of the as-synthesized {001}-TiO2/Au NCs were tested over 2-cycle degradation of methylene blue (MB) dye and pharmaceutical active compounds (PhACs) of ibuprofen and naproxen under direct sunlight illumination at 35 °C and 44,000 lx. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), fast Fourier transform (FFT), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) were employed for the characterization of the as-prepared sample. The characterization results from the TEM, XPS, and XRD studies established both the distribution of Au colloids on the surface of TiO2 material, and the presence of the highly crystalline structure of anatase {001}-TiO2/Au NCs. Photodegradation results from the visible light irradiation of MB indicate an enhanced photocatalytic performance of Au/TiO2 NCs over TiO2. The results from the photocatalytic activity test performed under direct sunlight exposure exhibited promising photodegradation efficiencies. In the first cycle, the sol–gel synthesized material exhibited relatively better efficiencies (91%) with the MB dye and ibuprofen, while the highest degradation efficiency for the second cycle was 79% for the MB dye. Pseudo first-order photodegradation rates from the first cycle were determined to be comparatively slower than those from the second degradation cycle.

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Section: Resultsmentioning

confidence: 71%

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

Usman

Cursaru

Branoiu

et al. 2022

Gels

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“…Higher photoelectrochemical activity was also obtained for GO/In 2 S 3 /TiO 2 nanorods used as photocatalysts for photoelectrochemical water splitting [227]. The improved performance was attributed to the larger surface area, visible light absorption and improved carrier transport because of additional defect states [92,[228][229][230].…”

Section: Water Splittingmentioning

confidence: 89%

A Review on the Progress and Future of TiO2/Graphene Photocatalysts

et al. 2022

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TiO2 is seen as a low cost, well-known photocatalyst; nevertheless, its sluggish charge kinetics does limit its applications. To overcome this aspect, one of the recent approaches is the use of its composites with graphene to enhance its photoactivity. Graphene-based materials (nanosheets, quantum dots, etc.) allow for attachment with TiO2 nanostructures, resulting in synergistic properties and thus increasing the functionality of the resulting composite. The current review aims to present the marked progress recently achieved in the use of TiO2/graphene composites in the field of photocatalysis. In this respect, we highlight the progress and insights in TiO2 and graphene composites in photocatalysis, including the basic mechanism of photocatalysis, the possible design strategies of the composites and an overview of how to characterize the graphene in the mixed composites. The use of composites in photocatalysis has also been reviewed, in which the recent literature has opened up more questions related to the reliability, potential, repeatability and connection of photocatalytic mechanisms with the resulting composites. TiO2/graphene-based composites can be a green light in the future of photocatalysis, targeting pollution remediation, energy generation, etc.

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Photochemical hydrogen production using advanced semiconducting metal oxide nanostructures

Atabaev,

Rustembekkyzy

2024

Nanotechnology for Hydrogen Production and Storage

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Facile synthesis of black N-TiO2 / N-RGO nanocomposite for hydrogen generation and electrochemical applications: New insights into the structure-performance relationship

Cited by 12 publications

References 68 publications

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

A Modified Sol–Gel Synthesis of Anatase {001}-TiO2/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

A Review on the Progress and Future of TiO2/Graphene Photocatalysts

Photochemical hydrogen production using advanced semiconducting metal oxide nanostructures

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