Dy MnFe2-O4 nanoparticles decorated over mesoporous silica for environmental remediation applications

Baig, Mirza Mahmood; Zulfiqar, Sonia; Yousuf, Muhammad; Shakir, Imran; Aboud, Mohamed F. Aly; Warsi, Muhammad Farooq

doi:10.1016/j.jhazmat.2020.123526

Cited by 57 publications

(23 citation statements)

References 64 publications

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“…Figure 3 represents the XRD spectra of MSNs (black line) and AS-g-PAni@MS (blue line) in the 2θ range of 5-80°. As can be seen from Figure 3 (black line), the XRD spectra of MSNs show the characteristics peaks at 2θ value of 5.80° and 22.12° [14], while the XRD of the spectra represents the characteristics peaks of both MSNs and PAni at 6.31° (MSNs) and 20.09°, 25.69° for periodicity parallel and perpendicular to PANI chains. Moreover, a broad peak at 2θ = 25.69 indicates the characteristic distance between the ring planes of the benzene ring to the adjacent chains [56].…”

Section: Analytical Techniques For Materials Characterizationmentioning

confidence: 91%

“…With a consideration of high porosity and aspect ratio, MSNs have been widely applied with prominent interest in adsorption technology for scavenging various types of inorganic and organic hazards from aquatic system [10,11]. In the literature various type of sol-gel process utilized surface functionalized mesoporous silica nanoparticles like CEL-PGA-MSN [12], RGD peptide-MSN [13], Dy x MnFe 2−x O 4 -MSN [14], Fe@Al-MSN [15], MMSNPs [16], TA-MSN-NH 2 [17], etc., have been used for adsorption of various dyes, inorganic ions and biomolecules. Based on the testimonials augmented in various publications and patens, it was observed that MSNs can be of the standard to fulfil the insatiable society's demand for the novel and applicable advanced materials [18,19].…”

Section: Introductionmentioning

confidence: 99%

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L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

et al. 2020

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In the present study, mesoporous silica nanoparticles (MSNs) synthesized through sol–gel process and calcined at 600 °C were further surface functionalized by a copolymer chain of L-ascorbic acid (AS) and polyaniline (PAni) by in situ free radical oxidative polymerization reaction. The surface modification of MSNs by AS-g-PAni was confirmed by using various analytical techniques, namely FTIR, XRD, SEM–EDX, TEM and AFM. The composition of AS-g-PAni@MS was found to be composed of C (52.53%), N (20.30%), O (25.69%) and Si (1.49%), with 26.42 nm as the particle size. Further, it was applied for the adsorption of crystal violet (CV) dye under batch, as well as fixed bed method. RSM–BBD was taken into consideration, to optimize the various operational parameters effecting the adsorption through batch method. To explore maximum efficiency of the material, it was further subjected to adsorption of CV under fixed bed method, using the variable bed heights of 3.7, 5.4 and 8.1 cm. Based on high value of regression coefficient (R2) and low value of RMSE given as (0.99, 0.02) for 3.7 cm, (0.99, 0.03), the breakthrough data were very well defined by the Thomas model, with optimum concurrence of stoichiometric adsorption capacity values. The external mass transfer equilibrium data were well fitted by the Langmuir model, with maximum monolayer adsorption capacity of 88.42 mg g−1 at 303 K, 92.51 mg g−1 at 313 K, 107.41 mg g−1 at 313 K and 113.25 mg g−1 at 333 K. The uptake of CV by AS-g-PAni@MS was well defined by pseudo second order model with rate constant K2 = 0.003 L mg–1 min–1 for 50 and 0.003 L mg–1 min–1 for 60 mg L–1 CV. The adsorption reaction was endothermic with enthalpy (ΔH) value of 3.62 KJ mol−1 and highly efficient for treatment of CV-contaminated water for more the five consecutive cycles.

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Section: Analytical Techniques For Materials Characterizationmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

et al. 2020

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“…When substitution of rare-earth ions is done in ferrites, then spin-orbit coupling commonly called L-S coupling supposed to occur between 3d and 4f electrons. This coupling brings modi cations in the structure which ultimately enhances the electrical and magnetic properties of the sample [14,15]. This is the reason why researchers prefer rare-earth atoms as their best candidates to employ them in ferrites to tune their physical and chemical properties according to their demand and need.…”

Section: Main Textmentioning

confidence: 99%

The Impact of Highly Paramagnetic Dy3+ Cations On Magnetic and Electrical Behaviour of Nanocrystalline Mnfe2o4

Baig

Zulfiqar

Yousuf

et al. 2021

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In this paper, the detailed study of magnetic properties of Dy3+ substituted soft manganese ferrite (MnFe2O4) nanoparticles with varied contents of Dy3+ ions (0.00 ≤ x ≤ 0.16) was carried out by vibrating sample magnetometery (VSM) at room temperature. The synthesis of reported magnetic materials was carried out via facile wet chemical route. Structural characterization was investigated via X-ray diffraction and infra-red spectroscopy. Exploration of magnetic measurements revealed an irregular behavior in the values of saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) depending upon the concentration of rare-earth ions (Dy3+). The fluctuations in the values of Ms, Mr, and Hc may be associated with the modifications in the spin-exchange interactions caused by structural changes due to the substitution of rare-earth ions (Dy3+). DC electrical resistivity values were recorded and were found to be increased with increased Dy3+ contents. The soft magnetic nature of Dy3+ substituted MnFe2O4 spinel ferrites nanoparticles suggested their possible utilization in switching mode power supplies, recording media, spintronics, and many other advanced technological devices.

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“…[17] The surface of the semiconductor material can be improved by nanotechnology or by introducing a porous matrix such as silica. [18] Among various matrices (supporting materials), silica possesses an admirable surface area, biocompatibility, numerous Si-OH groups on the surface, and excellent loading capacity for the target species. These features allow it to be a promising support material (matrix) for assembling the nanostructure photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

“…Mehmood and colleagues investigated the role of porous silica in the photodegradation of crystal violet. [18] Ahmadreza et al prepared nanostructured silica nanoballs with an adsorption capacity of 164 mg/g. [19] Afshari et al reported producing an effective adsorbent with an adsorption capacity above 8500 mg/g.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Silica‐Supported Al‐Doped ZnO and Its Use in the Elimination of the Toxic Organic Ingredients from Industrial Effluents

et al. 2021

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Herein, an easy co-precipitation method was adopted to fabricate Al-doped ZnO nanoflakes as a photocatalyst to remove noxious organic dye from industrial waste. The silica (SiO 2 ) additive, owing to its network structure and excessive hydroxyl groups (Si-OH), has a great potential to capture dye molecules in its porous network. Application studies have shown that the Al-doped ZnO/SiO 2 nanohybrid is more suitable for practical application because it eliminates almost 95 % of methylene blue (MB) dye after 120 minutes of exposure to solar light irradiation. The exceptional photodegradation efficiency of the Al-doped ZnO/SiO 2 nanohybrid can be accredited to its narrower optical band gap, distinctive texture, hybrid composition, and good dye holding ability. The Al-doped ZnO nanoflakes exhibited a superior photocurrent response that was 4.60 times more than the bare ZnO response. Furthermore, EIS and Mott-Schottky studies reveal that the Al-doped ZnO catalyst facilitates the effective charge separation/transfer process and impedes electron-hole pair recombination, resulting in enhanced photocatalytic activity .

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Dy MnFe2-O4 nanoparticles decorated over mesoporous silica for environmental remediation applications

Cited by 57 publications

References 64 publications

L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

L-Ascorbic Acid-g-Polyaniline Mesoporous Silica Nanocomposite for Efficient Removal of Crystal Violet: A Batch and Fixed Bed Breakthrough Studies

The Impact of Highly Paramagnetic Dy3+ Cations On Magnetic and Electrical Behaviour of Nanocrystalline Mnfe2o4

Fabrication of Silica‐Supported Al‐Doped ZnO and Its Use in the Elimination of the Toxic Organic Ingredients from Industrial Effluents

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