SiO2 caped Fe3O4 nanostructures as an active heterogeneous catalyst for 4-nitrophenol reduction

Shah, Muhammad Tariq; Balouch, Aamna; Sirajuddin, Sirajuddin; Pathan, Ashfaque Ahmed; Abdullah, .; Mahar, Ali Muhammad; Sabir, Saman; Khattak, Rozina; Umar, Akrajas Ali

doi:10.1007/s00542-017-3431-8

Cited by 48 publications

(9 citation statements)

References 52 publications

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“…According to the published data in literature, the mixed Fe–Si phase was formed at the interface of silica and Fe 3 O 4 during the synthesis of Fe 3 O 4 @SiO 2 nanoparticles. However, the phase changes were not observed due to the modification of magnetic nanoparticles with silica [28].…”

Section: Resultsmentioning

confidence: 99%

“…The strong absorption bands at 1081 and 970 cm À1 in Figure 1b are related to Si-O-Si antisymmetric and Si-OH stretching vibrations that confirm the successful coating of silica layers on Fe 3 O 4 . Also, the absorption peaks at 800 and 459 cm À1 are corresponded to the Si-O-Si symmetric stretching and Si-O-Si, O-Si-O bending mode or Si-O-Fe stretching vibrations, respectively [27][28][29]. The absorption bands of the chloropropyl-modified Fe 3 O 4 @SiO 2 nanoparticles are appeared at 2950-2960 (stretching vibration of C-H bond), 1424 and 1369 (symmetrical and asymmetrical C-H bending vibration), and 793 cm À1 (stretching vibration of C-Cl bond) [30].…”

Section: Resultsmentioning

confidence: 99%

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The synthesis and characterization of a magnetic histidine Schiff base palladium complex and its efficiency investigation in the nitroarene pollutants reduction and dyes degradation

Rafiee

Shirzadi

2022

Applied Organom Chemis

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At first, we prepared the chloropropyl‐modified Fe3O4@SiO2 nanoparticles and functionalized it with imidazole‐2carbaldehyde to provide an aldehyde functional group for the Schiff base formation with histidine amino acid. The nitrogen atoms of imidazole cycles, –C=N bonds, and –COOH groups of histidine could act as proper coordination positions for palladium complex formation. The obtained magnetic histidine Schiff base palladium complex (Fe3O4@SiO2@Im‐His@Pd) was characterized by fourier transform infrared (FT‐IR), field‐emission scanning electron microscopy (FE‐SEM), energy dispersive X‐ray (EDX), X‐ray diffraction (XRD), vibrating sample magnetometer (VSM) and inductively coupled plasma‐optical emission spectrometry (ICP‐OES) analysis. The prepared nanocomposite has shown good efficiency in the reduction of nitroarenes and dyes degradation under mild conditions at room temperature in short reaction times.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The synthesis and characterization of a magnetic histidine Schiff base palladium complex and its efficiency investigation in the nitroarene pollutants reduction and dyes degradation

Rafiee

Shirzadi

2022

Applied Organom Chemis

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“…In fact, the reduction of 4‐NP to 4‐AP is unfortunately very slow by NaBH 4 alone. [ 113 ] Thus, the catalyst use is required to allow electron transfer from the donor BH 4 − to the acceptor 4‐NP. [ 114 ] Scheme 2 shows the proposed catalytic activity of [FA‐c‐(C‐DTX)@Fe 3 O 4 ].…”

Section: Resultsmentioning

confidence: 99%

“…Similar absorption trends were reported previously. [ 111–116 ] The addition of Fe 3 O 4 nanocomposites had a marginal influence on 4‐NP reduction. Indeed, Figure 10 exhibited gradual 4‐NP reduction and 4‐AP generation.…”

Section: Resultsmentioning

confidence: 99%

New sonochemical magnetite nanoparticles functionalization approach of dithiooxamide–formaldehyde developed cellulose: From easy synthesis to recyclable 4‐nitrophenol reduction

Mehdaoui

Agren

Dhahri

et al. 2021

Applied Organom Chemis

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Magnetic [FA‐c‐(C‐DTX)@Fe3O4] nanocomposites have been prepared with a four‐step technique involving three mechanical stirring conventional steps to obtain [(FA‐c‐(DTX‐g‐DAC)] and an ultrasound‐assisted Fe3O4 coating approach to fabricate [FA‐c‐(C‐DTX)@Fe3O4]. Magnetic nanoparticles (NPs) (Fe3O4 NPs) synthesis and integration has been easily and rapidly approached under novel environmentally friendly optimized reaction conditions: an ethanol–water solution, one iron precursor use, short reaction time, low temperature, and an ultrasonic irradiation process. This new condition's unique combination is attributed to our new synthesis procedure. Sonochemically synthetisized [FA‐c‐(C‐DTX)@Fe3O4] were easily separated from the reaction mixture simply via external magnetic field application, and therefore, neither filtration nor centrifigation was required. The synthetisized samples have been investigated by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, X‐ray photoelectron spectroscopy (XPS), X‐ray diffraction (XRD), thermogravimetry analysis (TGA), scanning electron microscopy (SEM), and vibrating‐sample magnetometry (VSM). Obtained outcomes including successful magnetite coating process, good crystallinity, homogenous morphology, enhanced thermal stability, and obvious magnetic properties suggested the potential of sonochemical procedure to fabricate and integrate magnetic NPs. This sonochemically synthesized catalyst was evaluated toward the reduction of the organic pollutant 4‐nitrophenol and showed excellent catalytic activity. This ultrasound‐assisted nanocomposites preparation is simply scalable to meet industrial application.

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“…They are highly toxic for animals and humans and cause disorderness of liver, kidney and central nervous system. Reductions of nitrophenols generate the safer and non-toxic aminophenols which has several other applications [46][47].…”

Section: Introductionmentioning

confidence: 99%

Efficient biogenesis of Au nanoparticles using extract of Mentha pulegium flower: Evaluation of catalytic reduction of nitroarenes and anti-human colon cancer properties in the in vitro condition

Bovandi

Shahriari

Zangeneh

2020

Preprint

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Background With regards to applicative, facile, green chemical research, a bio-inspired approach is being reported for the synthesis of Au nanoparticles by using Mentha pulegium flower extract. Methods The phytochemical immobilized Au NPs were characterized by advanced physicochemical techniques like Fourier Transformed Infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray spectroscopy (EDX), and X-ray Diffraction (XRD) study. Thereafter, catalytic performance of those biomolecule functionalized Au NPs was investigated in the efficient reduction of nitroarenes over a range of substrates. To survey the anti-human colon cancer effects of gold nanoparticles, MTT assay was used on the common colon cancer cell lines i.e., colorectal adenocarcinoma (HT-29), colorectal carcinoma (HCT 116), ileocecal colorectal adenocarcinoma (HCT-8 [HRT-18]), and Burkitt's lymphoma (Ramos.2G6.4C10). Results The conversion was achieved in short reaction time with good to excellent yields in association with outstanding turnover frequency (TOF). In addition, the nanocomposite catalyst was easily recovered and recycled for 12 successive times without noticeable decrease in catalytic activity. Gold nanoparticles had high anti-colon cancer activities dose-dependently against HT-29, HCT 116, HCT-8 [HRT-18], and Ramos.2G6.4C10 cell lines. The best result of anti-colon cancer effects was seen in the case of the HCT 116 cell line. Conclusions It looks gold nanoparticles can be used for the treatment of several types of colon cancers in human.

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SiO2 caped Fe3O4 nanostructures as an active heterogeneous catalyst for 4-nitrophenol reduction

Cited by 48 publications

References 52 publications

The synthesis and characterization of a magnetic histidine Schiff base palladium complex and its efficiency investigation in the nitroarene pollutants reduction and dyes degradation

The synthesis and characterization of a magnetic histidine Schiff base palladium complex and its efficiency investigation in the nitroarene pollutants reduction and dyes degradation

New sonochemical magnetite nanoparticles functionalization approach of dithiooxamide–formaldehyde developed cellulose: From easy synthesis to recyclable 4‐nitrophenol reduction

Efficient biogenesis of Au nanoparticles using extract of Mentha pulegium flower: Evaluation of catalytic reduction of nitroarenes and anti-human colon cancer properties in the in vitro condition

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