Graphene oxide (GO)/Copper doped Hematite (<i>α</i>-Fe2O3) nanoparticles for organic pollutants degradation applications at room temperature and neutral pH

Twinkle, .; Singh, Karamjit; Bansal, Shikha; Kumar, Surinder

doi:10.1088/2053-1591/ab4459

Cited by 29 publications

(10 citation statements)

References 45 publications

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“…Bandgap reduction occurred in TiNPS-Fe2O3 and AgNPs-Fe2O3 which increased photocatalytic activity in the degradation of Congo Red [44]. Degradation efficiency reaches 70% when using Cu-Fe2O3 for the degradation of organic pollutants [45]. The result of the modification with sucrose on Fe2O3/SBA-15 has the lowest efficiency, which probably occurs due to the presence of pore-blocking and the formation of micropores on the external pore.…”

Section: Resultsmentioning

confidence: 99%

Understanding Pore Surface Modification of Sucrose-Modified Iron Oxide/Silica Mesoporous Composite for Degradation of Methylene Blue

Pertiwi

Ulfa

Saraswati

et al. 2021

Bull. Chem. React. Eng. Catal.

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Santa Barbara Amorphous (SBA-15) containing iron oxide with a sucrose-modified in a heterogeneous reaction for degradation methylene blue (MB) successful synthesized used hydrothermal, ultrasonication, and wet impregnation method. SBA-15 is mesoporous silica that can easily serve as external and internal surfaces making it suitable for a wide range of applications. The structure and morphology of materials were characterized using Surface Area Analyzer (SAA), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Transmission Electron Microscopy (TEM). Iron oxide impregnated as a maghemite phase has an average size of 12 nm and well distributed on the SBA-15. After modified with sucrose the materials remaining stable, which has a two-dimensional hexagonal (p6mm) structure, high specific surface area, and large pore volume (up to 1.82 cm3.g−1). The degradation of MB was evaluated under visible light irradiation using UV-Vis spectroscopy. Catalytic activity showed efficiencies of 52.9; 70.2; and 21.1% for SBA-15, Fe2O3/SBA-15, and sucrose-modified Fe2O3/SBA-15 respectively. Sucrose-modified Fe2O3/SBA-15 has the lowest efficiency, which probably occurs due to the presence of pore-blocking and the formation of micropores on the external pore. The modification with sucrose has the advantage of producing a high surface area even though there is a catalytic center due to partial decomposition which causes a decrease in the efficiency of degradation of MB. All materials provide a high micro surface area so that they can be further adapted and can be widely applied to many potential applications as both catalyst support and an adsorbent. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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Section: Resultsmentioning

confidence: 99%

Understanding Pore Surface Modification of Sucrose-Modified Iron Oxide/Silica Mesoporous Composite for Degradation of Methylene Blue

Pertiwi

Ulfa

Saraswati

et al. 2021

Bull. Chem. React. Eng. Catal.

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“…GO has been synthesized by the Tour method [25][26]. Firstly, an acid solution having 9:1 (volume/volume ratio) of concentrated H2SO4 and H3PO4 has been prepared.…”

Section: Preparation Of Gomentioning

confidence: 99%

Synthesis and characterization of Graphene Oxide and its reduction with different reducing agents

Bansal

Singh

Dhaliwal

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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-The present work reports the simplistic formation of graphene oxide (GO) and reduced graphene oxide (rGO) by oxidizing graphite powder with the 9:1 volume combination of concentrated sulfuric acid/and ortho-phosphoric acid (H2SO4/H3PO4) in the company of KMnO4 as an oxidant. The acid combination solution of H2SO4/H3PO4 produces the improved oxidized hydrophilic GO without any evolution of hazardous gases instead of only H2SO4, which differentiates this procedure from the Hummers’ method. Then, the synthesized GO is diminished to rGO by employing various reducers namely hydrazine hydrate, sodium borohydride and, ascorbic acid through the chemical route. The properties of synthesized materials have been investigated by diverse investigative systems that are X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), Raman spectroscopy and, Energy Dispersive X-ray spectroscopy (EDS) which approved its high crystallinity and reduction of GO into rGO. EDS analysis confirms that the carbon to oxygen ratio is higher in rGO prepared by using hydrazine hydrate in comparison to rGO made by using sodium borohydride and ascorbic acid which reveals the good reducing capability of hydrazine hydrate. Hence, it may be concluded that the rGO synthesized by the reduction of GO in the presence of hydrazine hydrate is better as compared to others and it is expected that the synthesized material may be used for various applications.

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“…The study of the detrimental effects of manmade nanoparticles on living beings and ecosystems is known as nanotoxicology. [129] Toxicity (poison) is described as a material's ability to tolerate typical environmental conditions to a certain extent. Nanoparticles have a unique feature in comparison to their larger counterparts that affect their toxicity, which is also known as nanotoxicity in nanomaterials, due to quantum size effects and also because of significant surface area to volume ratio (A/V).…”

Section: Nanotoxicity: An Environmental Challengementioning

confidence: 99%

Effect of nanofillers and nanotoxicity on the performance of composites: Influencing factors, future scope, challenges and applications

et al. 2022

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Nanocomposites are the innovative form of materials used at the nanoscale (1–100 nm in size). Parent materials are insufficient to satisfy the desired requirement to fulfill all the needs, hence to enhance various performances of composites, a suitable nanofiller (nanoparticle) can be used. The present study focuses on nanocomposite properties, types, and characteristic features. Nanocomposites that take advantage of fibers and nanofillers synergistically contribute to improved properties and environmental conditions by making them suitable for a wide range of applications (aerospace, automobile industries, electronics, biomedical, etc.). Nanocomposites are now being used in almost every field and find a wide spectrum of applications, including waste water treatment, corrosion protection, and so forth. In the present study, the effect of excessive use of nanoparticles (nanotoxicity) has also been addressed.

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Graphene oxide (GO)/Copper doped Hematite (α-Fe2O3) nanoparticles for organic pollutants degradation applications at room temperature and neutral pH

Cited by 29 publications

References 45 publications

Understanding Pore Surface Modification of Sucrose-Modified Iron Oxide/Silica Mesoporous Composite for Degradation of Methylene Blue

Understanding Pore Surface Modification of Sucrose-Modified Iron Oxide/Silica Mesoporous Composite for Degradation of Methylene Blue

Synthesis and characterization of Graphene Oxide and its reduction with different reducing agents

Effect of nanofillers and nanotoxicity on the performance of composites: Influencing factors, future scope, challenges and applications

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