A green synthesis of spirooxindole derivatives catalyzed by SiO2@g-C3N4 nanocomposite

Allahresani, Ali; Taheri, Bahare; Nasseri, Mohammad Ali

doi:10.1007/s11164-017-3160-8

Cited by 28 publications

(5 citation statements)

References 39 publications

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“…It confirms that Fe (III) ions chemically coordinate with the g-C 3 N 4 host, resulting in the reduction of the diffraction intensity and crystallinity of the nanocomposite. [30] The FT-IR spectra of the g-C 3 N 4 and Fe 2 O 3 /g-C 3 N 4 (1.0%) nanocomposites are shown in Figure 2. No apparent difference between two spectra reveals the same chemical functional groups.…”

Section: Photocatalysis Experimentsmentioning

confidence: 99%

Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Karimi

Iliyat

Atashkadi

et al. 2020

J Chinese Chemical Soc

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The preparation and photocatalytic performance of the Fe 2 O 3 /g-C 3 N 4 nanocomposites with different weight percentage of iron was investigated in this study. Samples were successfully synthesized using melamine and ferric nitrate as the precursors via the green and facile microwave-assisted method. The physicochemical and structural properties of the Fe 2 O 3-doped g-C 3 N 4 were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), the Brunauer-Emmett-Teller (BET) method, transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and ultraviolet-visible spectroscopy (UV-Vis). The photocatalytic activity of the Fe 2 O 3 /g-C 3 N 4 catalysts was evaluated by the degradation of methylene blue (MB) at room temperature under visible light irradiation. As expected, the assynthesized samples exhibited considerable improvement in the photodegradation of MB. The Fe 2 O 3 /g-C 3 N 4 (1.0 wt%) nanocomposite had superior photocatalytic activity, with almost 70% degradation efficiency within 90 min of irradiation. The enhanced performance was ascribed to the separation and migration of the photoinduced electron-hole pairs and taking part of the charge carriers in the chemical redox reactions at the surface of the photocatalyst. In this work, the effect of Fe weight percentage on the degradation potential was also studied, and the photocatalytic mechanism was proposed with the main reactive species •OH.

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Section: Photocatalysis Experimentsmentioning

confidence: 99%

Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Karimi

Iliyat

Atashkadi

et al. 2020

J Chinese Chemical Soc

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“…6c). 41,42 This synergistically demonstrated the increased oxygen content promoted photoelectric conversion for H 2 O reduction. The periodic photocurrent tests were performed with a light on/off interval of 20 s under open circuit voltage.…”

Section: Resultsmentioning

confidence: 84%

Porous graphitic carbon nitride with high concentration of oxygen promotes photocatalytic H₂ evolution

Yang

Wang

et al. 2022

RSC Adv.

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“…Refluxing aqueous ethanol was the best condition found for these reactions (Scheme 41C). No significant decrease in activity was verified after nine cycles [78] …”

Section: Spirooxindole Derivativesmentioning

confidence: 88%

“…HPA−F‐SBA‐LDH [80] SiO 2 @g‐C 3 N 4 [78] starch [88] isinglass [89] eggshell [90] Fe 3 O 4 /GO‐Mo [100] APTPOSS [101] Cs x H 3 ‐xPW 12 O 40 ‐ZZP [102] NiCo 2 O 4 @Ni(BDC) [152] activated alumina balls [180] …”

Section: Spirooxindole Derivativesmentioning

confidence: 99%

Engaging Isatins in Multicomponent Reactions (MCRs) – Easy Access to Structural Diversity

Brandão

Marques

Carreiro

et al. 2021

The Chemical Record

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Multicomponent reactions (MCRs) are a valuable tool in diversity‐oriented synthesis. Its application to privileged structures is gaining relevance in the fields of organic and medicinal chemistry. Isatin, due to its unique reactivity, can undergo different MCRs, affording multiple interesting scaffolds, namely oxindole‐derivatives (including spirooxindoles, bis‐oxindoles and 3,3‐disubstituted oxindoles) and even, under certain conditions, ring‐opening reactions occur that leads to other heterocyclic compounds. Over the past few years, new methodologies have been described for the application of this important and easily available starting material in MCRs. In this review, we explore these novelties, displaying them according to the structure of the final products obtained.

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A green synthesis of spirooxindole derivatives catalyzed by SiO2@g-C3N4 nanocomposite

Cited by 28 publications

References 39 publications

Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Porous graphitic carbon nitride with high concentration of oxygen promotes photocatalytic H₂ evolution

Engaging Isatins in Multicomponent Reactions (MCRs) – Easy Access to Structural Diversity

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A green synthesis of spirooxindole derivatives catalyzed by SiO2@g-C3N4 nanocomposite

Cited by 28 publications

References 39 publications

Microwave‐assisted synthesis of the Fe2O3/g‐C3N4 nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Microwave‐assisted synthesis of the Fe2O3/g‐C3N4 nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Porous graphitic carbon nitride with high concentration of oxygen promotes photocatalytic H2 evolution

Engaging Isatins in Multicomponent Reactions (MCRs) – Easy Access to Structural Diversity

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Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Microwave‐assisted synthesis of the Fe₂O₃/g‐C₃N₄ nanocomposites with enhanced photocatalytic activity for degradation of methylene blue

Porous graphitic carbon nitride with high concentration of oxygen promotes photocatalytic H₂ evolution