Synthesis of mesoporous core-shell CdS@TiO2 (0D and 1D) photocatalysts for solar-driven hydrogen fuel production

El-Maghrabi, Heba H.; Barhoum, Ahmed; Nada, Amr A.; Moustafa, Y. M.; Seliman, Sara Mikhail; Youssef, Ahmed M.

doi:10.1016/j.jphotochem.2017.10.048

Cited by 94 publications

(44 citation statements)

References 41 publications

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“…The formation of pure wurtzite structure of CdS is confirmed by the appearance of characteristic diffraction peaks at 2θ = 24.97 attributed to the (100), (002), (101), (102), (110), (103), (200), (112), (201), (004), (202), (203) and (210) planes, well matched with JCPDS card no. 80-0006 [32,33]. The formation of a nanocomposite in the form of CdS@xG@TiO 2 is confirmed by the presence of the wurtzite structure of CdS and the anatase phase of TiO 2 in all the samples.…”

Section: Materials Analysismentioning

confidence: 71%

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

et al. 2020

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Aiming to achieve enhanced photocatalytic activity and stability toward the generation of H2 from water, we have synthesized noble metal-free core-shell nanoparticles of graphene (G)-wrapped CdS and TiO2 (CdS@G@TiO2) by a facile hydrothermal method. The interlayer thickness of G between the CdS core and TiO2 shell is optimized by varying the amount of graphene quantum dots (GQD) during the synthesis procedure. The most optimized sample, i.e., CdS@50G@TiO2 generated 1510 µmole g−1 h−1 of H2 (apparent quantum efficiency (AQE) = 5.78%) from water under simulated solar light with air mass 1.5 global (AM 1.5G) condition which is ~2.7 times and ~2.2 time superior to pure TiO2 and pure CdS respectively, along with a stable generation of H2 during 40 h of continuous operation. The increased photocatalytic activity and stability of the CdS@50G@TiO2 sample are attributed to the enhanced visible light absorption and efficient charge separation and transfer between the CdS and TiO2 due to incorporation of graphene between the CdS core and TiO2 shell, which was also confirmed by UV-vis, photoelectrochemical and valence band XPS measurements.

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Section: Materials Analysismentioning

confidence: 71%

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

et al. 2020

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“…Based on their unique features, nanoparticles (NPs) are characterized by small with a large surface area and application in diverse fields, the fabrication of matter at the nanoscale (1-100 nm) has been improving rapidly in the last decade [1][2][3]. Besides chemical or physical methods or nano-synthesis of NPs by microorganisms and higher plants, fungi (myconanotechnology) came recently to attract the scientist's attention for the production of NPs [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mycogenic Silver Nanoparticles from Endophytic Trichoderma atroviride with Antimicrobial Activity

Abdel-Azeem

Nada

O’Donovan

et al. 2020

Journal of Renewable Materials

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There is an increasing interest in developing nanoparticles with diverse biologic activities. To this end, we prepared 10 to 15 nm silver nanoparticles (AgNP) from native isolates of Trichoderma atroviride. Within this study, endophytic fungi hosted four medicinal plants in Saint Katherine Protectorate, South Sinai, Egypt have been isolated by surface sterilization technique on four isolation media. Ten species, based on their frequency of occurrence, out of twenty recovered taxa were tested for their capability to synthesize extracellular AgNPs. Trichoderma atroviride hosted Chiliadenus montanus was found to be the best candidate for the production of mycogenic AgNPs among all examined species. The mycosynthesized AgNPs were compared with chemically synthesized and characterized using Ultraviolet-visible (UV-vis) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) techniques. The HRTEM result showed the distribution of spherical AgNPs ranging from 10 to 15 nm. Trichoderma atroviride isolate was subjected to sequencing for confirmation of phenotypic identification. The internal transcribed spacer (ITS) 1-5.8 s-ITS2 rDNA sequences obtained were compared with those deposited in the GenBank Database and registered with accession number MH283876 in the NCBI Database. Antibacterial, anticandidal and antifungal effects of chemically and mycosynthesized AgNPs were examined at various concentrations in vitro against six pathogenic bacteria and 4 pathogenic fungi by agar well diffusion technique. Standard antibiotics; Gentamicin, Amoxicillin, Clotrimazole, and Nystatin at 5 μg/disk were taken as positive controls, while 5% DMSO was used as the negative control. Our data revealed that the application of mycogenic AgNPs at a concentration of 100 ppm resulted in maximum inhibition of pathogenic bacteria and fungi. These data suggest that AgNPs from native isolates of Trichoderma atroviride (MH283876) offer a source of rapid synthesis of eco-friendly, economical biomaterials that show antimicrobial activities.

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“…[7][8][9] Photocatalysis in advanced oxidation technologies can utilize the photogenerated charge carriers to produce reactive radicals with strong oxidation capacity. [10][11][12][13][14][15][16] Different from adsorption, photo-oxidation can mineralize the organic pollutants into harmless inorganic salts, carbon dioxide and water. [17][18][19][20][21] This technology also bears a host of merits, such as environmental friendliness, low cost, long life and extensive universality, inspiring an increasing number of studies on wastewater treatment by photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

Hao

Liu

Chen³

et al. 2019

ACS Appl. Nano Mater.

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Chlorophenols are corrosive and toxic in water environment, which have arisen increasing concerns and urge solar-driven technique with highly efficient photocatalysts for green remediation. Coupling photocatalysis with surface plasmon resonance (SPR) effect is a practical solution to boosting the utilization of solar light in the infrared region, meanwhile improving the overall performance of the photocatalysts. However, it is still lack of a facile and green strategy to synthesize metallic non-noble bismuth (Bi 0)-based photocatalysts. Herein, we report smart Bi/Bi2O3/C composites with high performance for photocatalytic degradation of 2,4-dichlorophenol. Advanced characterizations such as X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) are applied to analyze the morphology and structure of the prepared materials. The photodegradation rate of the hybrid is significantly enhanced compared with the sole counterparts, which is 1.60-fold of Bi2O3 and 2.47-fold of g-C3N4. The synthesized Bi/C-2 exhibits excellent stability without decline in activity after four cycles. The SPR effect of Bi is identified to account for the strengthen photo-reactivity. Moreover, the relatively high utilization efficiency of solar energy and rapid separating rate of photogenerated electron and hole pairs helped to enhance the photocatalytic performance synergistically.

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Synthesis of mesoporous core-shell CdS@TiO2 (0D and 1D) photocatalysts for solar-driven hydrogen fuel production

Cited by 94 publications

References 41 publications

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

Mycogenic Silver Nanoparticles from Endophytic Trichoderma atroviride with Antimicrobial Activity

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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Synthesis of mesoporous core-shell CdS@TiO2 (0D and 1D) photocatalysts for solar-driven hydrogen fuel production

Cited by 94 publications

References 41 publications

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

Core-Shell Nanostructures of Graphene-Wrapped CdS Nanoparticles and TiO2 (CdS@G@TiO2): The Role of Graphene in Enhanced Photocatalytic H2 Generation

Mycogenic Silver Nanoparticles from Endophytic Trichoderma atroviride with Antimicrobial Activity

Bi2O3@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols