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

Abstract

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.

Fe3O4@SiO2@TiO2@PDA Nanocomposite for the Degradation of Organic Materials

“…A strong peak following the Fe-O stretching vibration at about 588 cm -1 and a peak related to OH detected at 3422 cm -1 can be found in Fig. 5A, which are completely consistent with those presented in the previous literature [37]. In Fig.…”

Convenient synthesis of dipeptide structures in solution phase assisted by a thioaza functionalized magnetic nanocatalyst

“…2 . The presence of Fe–O, Si–O, Si–OH, and Si–O–Si bonds, has been confirmed in all samples by the appeared peaks at 580, 784, 954, and 1096 cm −1 , respectively 51 , 52 . For Fe 3 O 4 @SiO 2 @vinyl sample, the peak appeared at 1622 cm −1 is related to C=C stretching 53 .…”

Synthesis of Fe3O4/CdWO4/carbon dots heterostructure with excellent visible light photocatalytic stability and activity for degradation of 4-nitrophenol and organic pollutant

“…Based on the Eqs. (3)(4)(5)(6), one can simply find that the formation of the ÁOH in visible spectrum can lead to the reaction positive holes, H 2 O as well as hydroxide ions on the surface of photocatalyst.…”

“…Physical health of both humans could be negatively affected through wastewaters, because they are contaminated by many kinds of dyes which could be cause of some diseases including hemolysis, hypertension, respiratory disorders, and organ damage. Also, it has been proved that those contaminations could have same effects on the animals living in water [1][2][3][4]. More importantly, different contaminants such as heavy metals, natural organic matters, and microorganisms can exacerbate such problems.…”