Preparation and Properties of Fe3O4/SiO2/TiO2 Core-Shell Nanocomposite as Recoverable Photocatalyst

Kunarti, Eko Sri; Syoufian, Akhmad; Budi, Iis Setyo; Pradipta, Adya Rizky

doi:10.14233/ajchem.2016.19697

Cited by 16 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A strong peak at ∼588 cm −1 of Fe 3 O 4 was obtained which was assigned to the Fe-O stretching vibration. There was a new strong band around 1,087 cm −1 in Figure 7B that came from the Si-O bond in SiO 2 (Kunarti et al, 2016) and the vibration band for the fingerprint of Ti-O-Ti bond in Figure 6C, which is located around 700 cm -1 (Kunarti et al, 2016;Doosti et al, 2018). The presence of a strong peak at 827 cm -1 is due to the V-O stretching vibration of VO 4 which has been displayed in Figure 7D (Marsooli et al, 2019).…”

Section: Characterizationmentioning

confidence: 82%

“…Figure 7 shows the FTIR spectrum of Fe 3 O 4 (a), Fe 3 O 4 /SiO 2 (b), Fe 3 O 4 /SiO 2/ TiO 2 (N 1 ) (c), Fe 3 O 4 /SiO 2/ TiO 2 /CeVO 4 (N 5 )(d), as well as N 5 sample after a complete photocatalytic reaction period with 20 ppm of MB dye. At all spectrums, the presence of water is shown by the appearance of the bending mode at around ∼1,600 cm -1 and the stretching mode at around ∼3,300 cm -1 (Kunarti et al, 2016;Doosti et al, 2018). A strong peak at ∼588 cm −1 of Fe 3 O 4 was obtained which was assigned to the Fe-O stretching vibration.…”

Section: Characterizationmentioning

confidence: 86%

See 1 more Smart Citation

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

et al. 2020

View full text Add to dashboard Cite

The new nanocomposite with various molar ratios along with magnetic properties was fabricated via precipitation (assisted by ultrasonic) procedure. The photocatalytic effects of methylene blue (∼90% degradation for optimized sample in 100 min) for finding the optimized sample performed under visible light irradiation. Moreover, the photo-antibacterial impacts of bacteria culture environments were found with an optimized sample that had effective destruction of bacteria in comparison to control group. The cytotoxicity properties of panc1 cells and magnetic behaviors of the obtained nanomaterials were evaluated and its IC50 was about 500 mg/L. As an initial step, the structural, morphological and magnetic characteristics of the fabricated nanocomposites were evaluated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) and MAP, UV-visible diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometry (VSM) approaches. Based on SEM results, the size of nanoparticles in fabricated nanocomposite was nearly 50-70 nm for Fe 3 O 4 /SiO 2 /TiO 2 and 80-100 nm for Fe 3 O 4 /SiO 2 /TiO 2 /CeVO 4 . XRD results showed that desired nanocomposites were truly synthesized without any impurities.

show abstract

Section: Characterizationmentioning

confidence: 82%

Section: Characterizationmentioning

confidence: 86%

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

et al. 2020

View full text Add to dashboard Cite

show abstract

“…There is more TiO 2 material bonded and the surface area becomes larger, which will lead to the improvement of the photoreduction activity of Ag(I) ions. In addition, the nanosized TiO 2 particles have a larger band-gap with a higher photoreduction capability, hence the strong reducing potential of the photogenerated electrons has made by the core-shell nanoparticles for reduction reactions 14 .…”

Section: Resultsmentioning

confidence: 99%

“…Xue et al found that the presence of silica layer between Fe 3 O 4 and TiO 2 nanoparticles could increase the lifetime of hole (h + ) product and yield a better photoreactivity 10 . The magnetic photocatalyst material has been applied for degradation of organic pollutants [11][12][13][14] . In this contribution, we report on the magnetic photocatalyst of Fe 3 O 4 /SiO 2 /TiO 2 core-shell for silver ion photoreduction.…”

Section: Introductionmentioning

confidence: 99%

Fe3O4/SiO2/TiO2 Core-Shell Nanoparticles as Catalyst for Ag(I) Ions

Kunarti¹,

Roto²,

Pradipta³

et al. 2017

Orient. J. Chem

View full text Add to dashboard Cite

Nanosized-photocatalysts with additional magnetic functionality have been studied extensively for many potential applications. Fe 3 O 4 /SiO 2 /TiO 2 core-shell nanoparticles have been evaluated as catalyst for photoreduction of aqueous solution of Ag(I) ions. The nanoparticles was prepared by coating Fe 3 O 4 with SiO 2 and TiO 2 consecutively through sol-gel process followed by microwaveassisted treatment. The prepared nanoparticles were confirmed by XRD and TEM. A photocatalytic reaction was carried out in a batch system with a UV-irradiation wavelength of 340-390 nm. The effects of catalyst loading, irradiation time and solution pH were studied. The Ag(I) photoreduction progress was monitored by AAS. The obtained Fe 3 O 4 /SiO 2 /TiO 2 core-shell nanoparticles can reduce 97% of Ag(I) in the solution whereas unmodified TiO 2 solids can only reduce 37% of the ion. The photocatalytic reaction could be best performed at pH 6, irradiation time of 2 h, and initial Ag(I) concentration of 25 mg/L. The prepared materials could be of interests in the treatment of waste containing toxic heavy metal ions.

show abstract

“…TiO2 as a photocatalyst can also be utilized in water purification, air purifiers, cancer therapies, hospital sterilization and self-cleaning equipment [4]. In recent years, TiO2 photocatalysts are widely used in water purification as they are ideal for the degradation of organic and inorganic pollutants [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Photoactivity of Fe3O4/TiO2-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

et al. 2018

View full text Add to dashboard Cite

Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated with TiO2-Co at a various ratio of Fe3O4:TiO2 and concentration of Co(II) dopant. The Fe3O4/TiO2-Co was characterized by FTIR, XRD, TEM, SEM-EDX, VSM, and SR UV-visible methods. Photoactivity of the Fe3O4/TiO2-Co was carried out using methylene blue as a target molecule in degradation reaction within a batch system. By using optimum conditions, the degradation of methylene blue solution was performed under exposure to UV, visible light and dark condition. Results showed that the Fe3O4/TiO2-Co formation was confirmed by the presence of Fe3O4 and anatase diffraction peaks in the X-ray diffractogram. SR UV-Vis spectra indicated that the Fe3O4/TiO2-Co was responsive to visible light. Band gap energy of the Fe3O4/TiO2-Co with dopant concentration of 1; 5; 10 and 15% were 3.22; 3.12; 3.09 and 2.81 eV, respectively. The methylene blue solution can be well photodegraded at a pH of 10 for 210 min. The Fe3O4/TiO2-Co has the highest ability to methylene blue photodegradation with dopant concentration of 10% gave degradation yield of 80.51 and 95.38% under UV and visible irradiation, respectively. ABSTRAK Sintesis fotokatalis magnetic, Fe3O4/TiO2-Co, disertai karakterisasi dan pengujian fotoaktivitasnya telah dilakukan. Penelitian diawali dengan sintesis partikel Fe3O4 secara kopresipitasi. Partikel Fe3O4 hasil sintesis kemudian dilapisi dengan TiO2-Co pada rasio mol Fe3O4:TiO2 serta konsentrasi ion Co(II) yang bervariasi. Fe3O4/TiO2-Co kemudian dikarakterisasi menggunakan metode FTIR, XRD, TEM, SEM EDX, VSM dan SR UV-Visibel. Pengujian fotoaktivitas Fe3O4/TiO2-Co dilakukan pada reaksi degradasi metilen biru yang dilakukan dalam sistem batch. Pengaruh konsentrasi ion Co(II) dikaji terhadap efektivitas reaksi fotokatalisis. Selanjutnya dengan menggunakan kondisi optimum, degradasi metilen biru terkatalisis Fe3O4/TiO2-Co dilakukan pada paparan sinar UV, sinar tampak dan kondisi gelap. Hasil penelitian menunjukkan bahwa Fe3O4/TiO2-Co dikonfirmasi keberadaannya melalui munculnya puncak Fe3O4 dan anatase pada difraktogram sinar-X. Spektra SR UV-Vis menunjukkan bahwa Fe3O4/TiO2-Co responsif terhadap sinar tampak. Nilai energi celah pita Fe3O4/TiO2-Co dengan konsentrasi dopan 1,0; 5; 10 dan 15% secara berurutan sebesar 3,22; 3,12; 3,09 dan 2,81 eV. Hasil pengujian aktivitas Fe3O4/TiO2-Co menunjukkan bahwa metilen biru dapat terfotodegradasi dengan baik pada pH 10 dengan waktu reaksi selama 210 menit. Fotokatalis Fe3O4/TiO2-Co memiliki kemampuan fotodegradasi paling tinggi pada konsentrasi dopan 10 % dengan nilai fotodegradasi di bawah radiasi sinar UV dan visibel masing-masing sebesar 80,51 dan 95,38%.

show abstract

Preparation and Properties of Fe3O4/SiO2/TiO2 Core-Shell Nanocomposite as Recoverable Photocatalyst

Cited by 16 publications

References 0 publications

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

Fe3O4/SiO2/TiO2 Core-Shell Nanoparticles as Catalyst for Ag(I) Ions

Synthesis and Photoactivity of Fe<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub>-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

Contact Info

Product

Resources

About