Photocatalytic degradation of methylene blue dye over novel spherical mesoporous Cr 2 O 3 /TiO 2  nanoparticles prepared by sol-gel using octadecylamine template

Ahmed, M.A.; Abou-Gamra, Z. M.; Salem, A.

doi:10.1016/j.jece.2017.08.014

Cited by 66 publications

(32 citation statements)

References 34 publications

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“…79 In the same way, decolorization of MG by Ag-AuNPs synthesized by cell-free extract of B. safensis after 48 hr was reported within the range of 86.1-92.6%. 5 There are reports of outstanding potentials of biosynthesized nanoparticles in dye biodegradation, 13,[80][81][82][83] and the system is viewed to be advantageous to other treatment techniques that are primarily involved in the concentration of dyes or transferring them from one phase to another. 5 3.6 | Antioxidant activities of Ag-AuNPs…”

Section: Antifungal Activities Of Ag-aunpsmentioning

confidence: 99%

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Elegbede

Lateef

Azeez

et al. 2019

Biotechnology Progress

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The search for biocompatible nanoparticles with vast applicability has impacted on exploration of various biomaterials for the synthesis of mono and bimetallic nanoparticles. Xylanase is widely regarded as an industrially important enzyme but its potentials in nanotechnological applications are yet to be fully explored. The current study investigates the exploit of xylanases of Aspergillus niger L3 (NE) and Trichoderma longibrachiatum L2 (TE) produced through valorization of corn‐cob, to synthesize silver‐gold alloy nanoparticles (Ag‐AuNPs). Characterization of the Ag‐AuNPs involved UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy and transmission electron microscopy, while their prospective use as antimicrobial, antioxidant, catalytic, anticoagulant, and thrombolytic agents were studied. The biosynthesized Ag‐AuNPs were ruby red and light purple with surface plasmon resonance at 520 and 534 nm for NEAg‐AuNPs and TEAg‐AuNPs, respectively; while FTIR showed that protein molecules capped and stabilized the nanoparticles. The Ag‐AuNPs were anisotropic with spherical, oval, and irregular shapes having sizes ranging from 6.98 to 52.51 nm. The nanoparticles appreciably inhibited the growth of tested clinical bacteria (23.40–90.70%) and fungi (70.10–89.05%), and also scavenged 2,2‐diphenyl‐1‐picrylhydrazyl (48.51–53.79%) and hydrogen peroxide (80.5–95.50%). Furthermore, the Ag‐AuNPs degraded malachite green (91.39%) and methylene blue (47.10%). Moreover, the Ag‐AuNPs displayed outstanding anticoagulant and thrombolytic activities using human blood. This study further emphasizes the significance of xylanases in nanobiotechnology as it has established the potential of xylanases to synthesize Ag‐AuNPs, which is being reported for the first time.

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Section: Antifungal Activities Of Ag-aunpsmentioning

confidence: 99%

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Elegbede

Lateef

Azeez

et al. 2019

Biotechnology Progress

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“…The presence of the plateau indicates that the catalyst has amphoteric properties and acts as a buffer in this range of pH (4)(5)(6)(7)(8). In this range, the pH final is almost the same for all values of pH initial and corresponds to pHpzc.…”

Section: Textural Characterization Pbcro 4 /P-25 Of Nanoparticlesmentioning

confidence: 99%

“…Moreover, the mineralization processes through various redox reactions are encountered by the rapid recombination of the charge carriers. To overcome these problems, several approaches such as dye sensitization [3,4] and composite [5,6] are used. Recently, numerous efforts is paid to development of the visible light-driven (400-800 nm) photocatalysts (color catalysts) as visible light is abundant in solar spectrum [7,8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of commercial PbCrO4/TiO2 for photodegradation of rhodamine B in aqueous solution by visible light

Abou-Gamra

Ahmed

Hamza

2017

Nanotechnol. Environ. Eng.

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This study throws light on utilization of visible light in removal dyes from wastewater using commercial PbCrO 4 /TiO 2 (P-25) composite which was prepared by grinding TiO 2 (P-25) with PbCrO 4 to decrease the adhesion properties of PbCrO 4 . As-prepared catalyst was characterized by DRS, XRD and N 2 adsorption-desorption. The morphology was examined by SEM. The photodegradation of rhodamine B (Rh B) product in the presence of PbCrO 4 / TiO 2 (P-25) composite was dependent on the pH of the medium. In 2 \ pH \ 10, Rh B was involved in photodegradation via N-deethylation terminated at rhodamine 110 while at pH = 2 rhodamine 110 underwent chromophore destruction. Obtained data showed that HO 2• /O 2•-species were involved in degradation of dye. Commercial PbCrO 4 /TiO 2 (P-25) composite is considered as good visible light-sensitive photocatalyst for removing Rh B.

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“…However, these treatments are expensive, take long time, and may lead to the main pollutant transfer into a second one that requires further removal. A successful method for dye removal is concerned with utilizing nano semiconductors as photocatalyst, for instance, TiO 2 , ZnO, Fe 2 O 3 , and CdS that exhibit high photocatalytic performance in removal of several organic compositions without transfer a primary pollutant into series of toxic materials [3][4][5][6][7][8][9][10]. There are majority studies about using TiO 2 degradation and removal of various toxic organic dyes due to the stability of its wide bandgap, strong oxidizing power, non-toxicity, and lower cost.…”

Section: Introductionmentioning

confidence: 99%

“…They only exhibit excellent photocatalytic activity under ultraviolet light irradiation, which significantly limit their practical applications [11][12][13]. Fe 3+ ion with narrow bandgap energy (1.9 eV) is one of the promising candidates that can effectively enhance the photocatalytic features of titanic due to its half-filled electronic configuration and the similarity of the ionic radius of Fe 3+ (0.64 Å) with that of coordinated Ti 4+ (0.68 Å) [3]. However, Fe 2 O 3 /H 2 O 2 was used as a effective, nontoxic semiconductor for the degradation of a wide range of organic chemicals and synthetic dyes [14,15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions

Wang

et al. 2019

Env Prog and Sustain Energy

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The removal of organic dye from aqueous solution is crucial to human health and environmental pollution. Herein, α‐Fe2O3 nanospheres were synthesized through sol–gel method and applied as adsorbents to remove methylene blue (MB) from aqueous solutions. The precursor samples annealed at different temperature were characterized by means of X‐ray diffraction and Raman spectroscopy. The results showed the as‐prepared sample was α‐Fe2O3 phase with well‐crystallized rhombohedra structure. Scanning electron microscopy and transmission electron microscope showed that the synthesized α‐Fe2O3 product was consisted of nanospheres. The Brunauer–Emmett–Teller showed the synthesized samples exhibited possessing high specific surface area with mesoporous structures. The as‐prepared synthesized α‐Fe2O3 nanospheres had excellent degraded properties; the maximum degradation rate for MB was around 94% within 10 min when the α‐Fe2O3 nanospheres content was 0.15 g L−1. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Photocatalytic degradation of methylene blue dye over novel spherical mesoporous Cr 2 O 3 /TiO 2 nanoparticles prepared by sol-gel using octadecylamine template

Cited by 66 publications

References 34 publications

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Investigation of commercial PbCrO4/TiO2 for photodegradation of rhodamine B in aqueous solution by visible light

Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions

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Photocatalytic degradation of methylene blue dye over novel spherical mesoporous Cr 2 O 3 /TiO 2 nanoparticles prepared by sol-gel using octadecylamine template

Cited by 66 publications

References 34 publications

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Investigation of commercial PbCrO4/TiO2 for photodegradation of rhodamine B in aqueous solution by visible light

Synthesis of Alpha‐Fe2O3 nanospheres and its dark‐degradation for organic dye pollutions

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Synthesis of Alpha‐Fe₂O₃ nanospheres and its dark‐degradation for organic dye pollutions