Synthesis and characterization of Fe3O4/TiO2 magnetic and photocatalyst bifunctional core-shell with superparamagnetic performance

Behrad, F.; Farimani, Mitra Helmi Rashid; Shahtahmasebi, N.; Roknabadi, Mahmood Rezaee; Karimipour, Masoud

doi:10.1140/epjp/i2015-15144-y

Cited by 22 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. According to these images, a layer is formed on the iron oxide particles which has resulted in the non-uniformity of nanoparticle surfaces [25]. Increasing time can be effective in particles coating and increasing photo-catalytic properties.…”

Section: Resultsmentioning

confidence: 99%

“…As a result of the titanium oxide coating, saturation magnetization of F20/TU and F20/TS samples has obtained as 23 emu/g and 9 emu/g, respectively, in which the decrease in magnetic properties is due to titanium oxide coating on Fe 3 O 4 nanoparticles. Behrad et al [25] have produced a magnetic composite by titanium oxide coating and have reported that saturation magnetization of the prepared photo-catalytic composite is 3.7 emu/g. They have stated that the core/shell nanostructure of Fe 3 O 4 /TiO 2 has a good magnetic recovery capability.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the frequency of Fe III -O band (Fe III O 6 ) shows a shift in comparison with Fe-O absorption band in Fe 3 O 4 bulk (570 cm -1 ) which is due to the increase in the surface band force constant originated from the refinement of grains to nano scale [47,48]. The bands centered at 2923 cm -1 and 1624 cm -1 are related to bending vibrations of H-O-H of water molecules [49,50], whilst the band at 3390 cm -1 is attributed to the tensile vibration of O-H group [25,50,51]. According to the FTIR spectrum of F20/TS nanocomposite sample, absorption at low frequencies of 500-900 cm -1 is associated with the tensile vibration of Ti-O-Ti bonds [10].…”

Section: Resultsmentioning

confidence: 99%

“…In order to create a titanium oxide coating on Fe 3 O 4 particles, the method of Behrad et al [25] was utilized. Firstly, 2 wt.% of the prepared Fe 3 O 4 powder (F20 optimum sample) was added to 70 ml ethanol and 2.5 ml ammonia, and the mixture was maintained under magnetic stirring.…”

Section: Synthesis Of Fe 3 O 4 /Tio 2 Nanocomposites By Stöber Methodsmentioning

confidence: 99%

“…[21][22][23][24]; among which sol-gel method offers a number of unique features and is very common. Uniform nanostructures of titanium oxide can be obtained by a method known as Stöber, which is originated from the sol-gel process [25]. However, the time needed for production by this method is long and the developed precipitates are naturally amorphous.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

et al. 2020

View full text Add to dashboard Cite

In the present research, Fe3O4/TiO2 magnetic photo-catalytic nanocomposites with a core/shell structure were successfully synthesized using two techniques of ultrasonic and St?ber. In this way, iron oxide (II, III) nanoparticles as soft magnetic cores of this composite were prepared by utilizing a chemical method assisted by ultrasound with a Fe+3/Fe+2 molar ratio of 1.5 under the nitrogen atmosphere. Thereafter, titanium oxide coating was performed on Fe3O4 nanoparticles by using tetrabutyl orthotitanate (TBOT) and titanium isopropoxide (TTIP) precursors. The resultant nanostructures were characterized by means of X-ray powder diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, energy dispersive X-ray (EDX) analysis, vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Through findings obtained from TEM examinations, the formation of core/shell nanostructure was confirmed in the prepared Fe3O4/TiO2 composites. Analysis of magnetic properties revealed that titanium oxide coating on iron oxide nanoparticles reduces saturation magnetization (Ms). The values of saturation magnetization for Fe3O4 powder and Fe3O4/TiO2 nanocomposite powders achieved via ultrasonic and St?ber methods were 60, 23 and 9 emu/g, respectively. Photo-catalytic properties of Fe3O4/TiO2 nanostructures were evaluated by the use of methylene blue dye under UV light. Results indicated that Fe3O4/TiO2 composite obtained by the St?ber method has a better photo-catalytic property as well as a decreased but acceptable magnetic separation. Degradation of methylene blue dye in the presence of photo-catalytic powder prepared by ultrasonic and St?ber procedures was 61 and 69 %, respectively, within 90 minutes of UV light exposure.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Fe 3 O 4 /Tio 2 Nanocomposites By Stöber Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

et al. 2020

View full text Add to dashboard Cite

show abstract

Preparation and characterization of a novel DABCO‐based ionic liquid supported on Fe₃O₄@TiO₂ nanoparticles and investigation of its catalytic activity in the synthesis of quinazolinones

Bakhshali‐Dehkordi

Ghasemzadeh

Safaei‐Ghomi

2020

Applied Organom Chemis

View full text Add to dashboard Cite

In this study, quinazolinone derivatives have been synthesized via a suitable and efficient procedure by one‐potmulti‐component reactions of 3‐amino‐1,2,4‐triazole or 2‐aminobenzimidazole, dimedone and aromatic aldehydes in the presence of Fe3O4@TiO2‐IL as nanocatalyst under solvent‐free condition. The products were prepared in good to excellent yields using Fe3O4@TiO2‐IL magnetic nanocatalyst. The Fe3O4@TiO2 magnetic nanoparticles (MNPs) were prepared using beet juice extract and functionalized with IL based on DABCO. Moreover, the core‐shell structured magnetic Fe3O4@TiO2‐IL has been characterized by different techniques such as 1H‐NMR, FT‐IR, VSM, XRD, SEM, TGA, TEM and EDX. To the best of our knowledge, the prepared ionic liquid displayed a good protective and activator agent for magnetic nanocatalyst.

show abstract

Novel and Green Preparation of Fe₃O₄@TiO₂‐Immobilized‐ILs Based on DABCO for Highly Efficient Synthesis of Primido[4,5‐d]pyrimidines

Ghasemzadeh

Bakhshali‐Dehkordi

2020

ChemistrySelect

View full text Add to dashboard Cite

Recently, ionic liquids immobilized on magnetic nanoparticles (MNPs) have drawn increasing attentions in organic synthesis and separation technologies and gained substantial progresses. In this study, the Fe3O4@TiO2@ILs nanocatalyst was first synthesized and characterized by using techniques such as Fourier transform infrared spectroscopy (FT‐IR), energy‐dispersive X‐ray (EDX), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE‐SEM), powder X‐ray diffraction (XRD), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The efficiency of the nanocatalyst was investigated in the preparation of pyrimido[4,5‐d]pyrimidine derivatives under solvent‐free conditions. The nanocatalyst demonstrated excellent catalytic activity and the products were synthesized in good to excellent yields. Moreover, the recoverability and reusability of the catalyst were investigated to show the effect of ionic liquid moieties on the stabilization of Fe3O4@TiO2@ILs species during the reactions. Our study showed that the nanocatalyst could be recovered and reused at least seven times without any appreciable decrease in activity which confirmed its high efficiency and high stability under the reaction conditions.

show abstract

Synthesis and characterization of Fe3O4/TiO2 magnetic and photocatalyst bifunctional core-shell with superparamagnetic performance

Cited by 22 publications

References 21 publications

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

Preparation and characterization of a novel DABCO‐based ionic liquid supported on Fe₃O₄@TiO₂ nanoparticles and investigation of its catalytic activity in the synthesis of quinazolinones

Novel and Green Preparation of Fe₃O₄@TiO₂‐Immobilized‐ILs Based on DABCO for Highly Efficient Synthesis of Primido[4,5‐d]pyrimidines

Contact Info

Product

Resources

About

Synthesis and characterization of Fe3O4/TiO2 magnetic and photocatalyst bifunctional core-shell with superparamagnetic performance

Cited by 22 publications

References 21 publications

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

Comparison of the structural and photo-catalytic properties of nanostructured Fe3O4/TiO2 core-shell composites synthesized by ultrasonic and Stöber methods

Preparation and characterization of a novel DABCO‐based ionic liquid supported on Fe3O4@TiO2 nanoparticles and investigation of its catalytic activity in the synthesis of quinazolinones

Novel and Green Preparation of Fe3O4@TiO2‐Immobilized‐ILs Based on DABCO for Highly Efficient Synthesis of Primido[4,5‐d]pyrimidines

Contact Info

Product

Resources

About

Preparation and characterization of a novel DABCO‐based ionic liquid supported on Fe₃O₄@TiO₂ nanoparticles and investigation of its catalytic activity in the synthesis of quinazolinones

Novel and Green Preparation of Fe₃O₄@TiO₂‐Immobilized‐ILs Based on DABCO for Highly Efficient Synthesis of Primido[4,5‐d]pyrimidines