The effect of Fe₃O₄concentration to photocatalytic activity of Fe₃O₄@TiO₂-PVP core-shell nanocomposite

Abstract

A study on the preparation of Congo red textile dyes using nanocatalysts, Fe3O4@TiO2 material, and Polyvinyl Pyrrolidone (PVP) has been successfully carried out. The preparation of these dyes is intended as a controller of the shape and size of particles and as a superior adhesive in solution. Fe3O4@TiO2 core-shell (FTP) nanocomposite was carried out by coprecipitation method. The Fe3O4 nanoparticles were designed as cores that were synthesized from Cilacap iron sand, while TiO2 nanoparticles were selected as a shell through the synthesis of Titanium (III) chloride. Fe3O4@TiO2 core-shell nanocomposite is characterized using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), and UV-Visible Spectroscopic (UV-Vis). Through XRD data analysis, the crystalline nano-phase composite of Fe3O4@TiO2 core-shell did not experience significant changes with the addition of Fe3O4 concentration. The contribution of the addition of Fe3O4 concentration can be observed in changes in sample grain size. The higher the concentration of Fe3O4 is, the smaller the grain size of the samples produced, ranging between 6-9 nm and can increase the percentage of degradation of Congo red dyes. In addition, optimum degradation in UV-Vis characterization occurred in FTP 0.5 samples that reached 78.20% at minute 100. The photodegradation effect that occurs in Congo red dyes is caused by photocatalytic mechanisms.

[Retracted] Preparation of Iron Oxide and Titania‐Based Composite, Core‐Shell Populated, Nanoparticulates Material by Two‐Step LASER Ablation in Aqueous Media as Antimicrobial and Anticancer Agents

“…The magnetic properties of these nanoparticles and their modifications have also led these materials to selectively accumulate at the tumor site through externally directed magnetic force. Thus, the delivery is considered “targeted” [ 24 ]. However, the easy agglomeration of the IONPs has curtailed their utility, and several frontline applications and biomedical approaches of the IONPs have been hindered.…”

“…The making of the core-shell iron oxide-titania NPs by TiO 2 insertion as the core of the core-shell through following an independent synthetic approach has provided an option in finding metal-based site-specificity to the tumor location, especially the biosystems deep-located and embedded cancers. The core-shell nanocomposite structures are known to increase the composite NPs stability and provide enhanced dispensability, together with magnetically driven delivery and heat generation at the site [ 24 , 25 ]. The characteristics and requirements have placed the core-shell materials as a potential target for further investigations.…”

Preparation, Characterization, and Application of Novel Ternary PPS/PVA/Fe3O4 Nanocomposite for Enhanced Visible Light Photocatalytic Degradation of Methylene Blue

“…13a. Based on the experimental results and analytical studies described above, a possible electron-hole transfer mechanism can be explained as follows: The defective crystal structure of the PPS/PVA/Fe 3 O 4 nanocomposite increases the light sensitivity and offers an e cient visible light harvesting capability [19,41]. The magnetic nanocomposite absorbs light photons whose wavelengths are equal to or greater than its bandgap (Eg).…”

“…It has good chemical stability, exibility, inherent ame resistance, and superb mechanical and environmental properties [16]. Despite its electrical insulation characteristics, high-performance PPS is used as a host matrix of composites, and many studies have revealed its successful employment in photocatalysis to boost photocatalytic activity [8,11,[17][18][19]. The PPS backbone has plenty of benzene rings, forming π-π stacking adsorption and acting as electron sources for electrophilic substitution reactions.…”

“…In both Fe 3 O 4 and PPS/Fe 3 O 4 spectra, the absorption band at 530 cm -1 is well seen and assigned to the stretching vibrations of the Fe-O bond. The lower intensity of this peak in the spectra of PVA/Fe 3 O 4 and PPS/PVA/Fe 3 O 4 indicates the strong interaction between Fe 3 O 4 nanoparticles and PVA[19,20]. The FT-IR spectra of all magnetic samples have the distinctive O-H vibration from adsorbed water at 3485 cm -1 , enabling their surfaces to be coated by polymers.…”