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

Abstract

In order to enhance the effectiveness of pollutant removal by photocatalysis under visible light, a multifunctional photocatalyst was prepared by grafting polydopamine (PDA) with the core-shell nanocomposite Fe 3 O 4 @SiO 2 @TiO 2 (FST). The structural, morphological, and magnetic responses of FST@PDA were characterized by X-ray diffraction pattern, Fourier transform infrared spectroscopy, transmission electron microscopy, etc. FST@PDA showed a high degradation rate of rhodamine B, reaching 98.7 % and 95.7 % after 150 min of ultraviolet and visible light radiation, respectively. In addition, the prepared FST@PDA had good safety and high recyclability due to the strong covalent bonds between FST and PDA.

Fabrication and characterization of new Fe3O4@SiO2@TiO2-CPTS-HBAP (FST-CH) nanoparticles for photocatalytic degradation and adsorption removal of rhodamine B dye in the aquatic environment

“…The detectioned peaks in 2θ of 30.3°(220), 35.9°(311), 43.1°(400), 57.4°(511), and 62.7°(440) for Fe 3 O 4 complatelly compatible with the standard XRD spectral data ( Fig. 4 a) [ 34 , 49 , 62 ]. The XRD model ( Fig.…”

“…The XRD model ( Fig. 4 b) of Fe 3 O4@SiO 2 nanoparticles formed after SiO2 coating on the surface of Fe 3 O 4 magnetic nanoparticles appears to have the same diffraction peak as Fe 3 O 4 , which means that the crystal structure of Fe 3 O 4 is preserved after SiO 2 coating [ 62 ]. The XRD spectrum of the Fe 3 O 4 @SiO 2 @TiO 2 (FST) in Fig.…”

Highly Efficient Electrochemical Sensing of Acetaminophen by Cobalt Oxide-Embedded Nitrogen-Doped Hollow Carbon Spheres

“…Here, all the Co 3 O 4 @NHCS materials exhibit a highly uniform sphere-like morphology with a sphere size of around 300 nm. Such an observation proved that various amounts of Co source effectively covered the PDA-SiO 2 material and controlled the hollow sphere morphology . In addition, the hollow carbon structure is further confirmed by HRTEM analysis and is presented in Figure .…”

“…Such an observation proved that various amounts of Co source effectively covered the PDA-SiO 2 material and controlled the hollow sphere morphology. 52 In addition, the hollow carbon structure is further confirmed by HRTEM analysis and is presented in Figure 3. HRTEM results revealed a highly stable uniform cobalt oxide-decorated hollow carbon sphere.…”

Individual Dye Removal Efficiencies in a Ternary Dye Mixture by Electrocoagulation

“…Various techniques have been developed and applied in the industries before discharging the wastewater into main water bodies and the atmosphere [1][2][3]. For wastewater treatment, electrocoagulation, adsorption, catalytic degradation, and other techniques have been established in the industry [4][5][6].…”