High temperature synthesis of interfacial functionalized carboxylate mesoporous TiO2 for effective adsorption of cationic dyes

Nguyen-Le, Minh-Tri; Lee, Byeong–Kyu

doi:10.1016/j.cej.2015.06.075

Cited by 57 publications

(20 citation statements)

References 53 publications

(48 reference statements)

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“…The physical origin of the cation-π interaction was primarily electrostatic, involving an attraction of the cation to a locus of negative electrostatic potential associated with the face of the π system. Similar cation-π interactions were obtained in sorption of RB5 on walnut activated carbon [44], adsorption of chlorophenol on single-walled carbon nanotubes (SWCNTs) [74] and adsorption of methylene blue on mesoporous TiO 2 [75]. Thus, the proposed adsorption mechanisms included hydrogen bonding, electrostatic bonding, and cation-π interactions, as shown in Figure 7.…”

Section: Removal Mechanismsupporting

confidence: 66%

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Deng

Zhang

Cao

et al. 2018

Env Prog and Sustain Energy

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In this study, mesoporous Al2O3@TiO2 nanocomposites were synthesized via two successive precipitation methods. Due to the coated TiO2 layer, the Al2O3@TiO2 exhibited a significantly enhanced efficiency for the removal of reactive black 5 dye (RB5). The morphology and compositional characteristics of Al2O3@TiO2 were investigated by TEM, HRTEM, XRD, EDS, FTIR, BET, and zeta‐potential analysis. TEM photos illustrated that TiO2 film covered Al2O3, XRD suggested compositional phases of γ‐Al2O3 and anatase TiO2, and BET measurement confirmed its characteristic of the mesoporous material. Al2O3@TiO2 was applied as an adsorbent to remove RB5 from aqueous solution, and the adsorption isotherms fitted well to the Langmuir isotherm model. The photocatalysis experiments confirmed that Al2O3@TiO2 had the good photocatalytic performance for degrading RB5 and the hydroxyl radical was the major active group. The UV–Vis adsorbance spectra demonstrated that this Al2O3@TiO2 could incompletely degrade RB5 dye under natural indoor light simultaneously when adsorption occurred. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S230–S242, 2019

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Section: Removal Mechanismsupporting

confidence: 66%

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Deng

Zhang

Cao

et al. 2018

Env Prog and Sustain Energy

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“…And adsorption is one of the most commonly used methods because of its simplicity, effectiveness, ease of operation, and reusability. 8,9 A large number of adsorbents, such as clays, 10 metal oxides, 11 activated carbon, 7 and fly ash 12 have been applied to remove dyes from wastewater. However, owing to the high cost and the difficulties related to disposal and regeneration, most of these adsorbents cannot be widely used.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Over the years, various methods for the removal of dyes from the wastewater have been developed, such as membrane separation, oxidation, chemical precipitation, biological process, adsorption, etc. And adsorption is one of the most commonly used methods because of its simplicity, effectiveness, ease of operation, and reusability. , …”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Highly Porous Fe(OH)₃@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water

Zhao

et al. 2017

ACS Sustainable Chem. Eng.

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Research on water purification has recently revolved around nanomaterials because of their large specific surface area. However, there are still some problems associated with the preparation, application, and recovery of nanomaterials. Herein, we report for the first time a novel approach for one-step synthesis of porous hybrid fibers (PHFs), which can be used as an effective adsorbent for dye removal from polluted water. A lowcost biopolymer cellulose was chosen as the matrix of the fibers, whereas a NaOH solution was applied as the coagulation bath for the cellulose spinning dope that contained a certain amount of FeCl 3 . The obtained Fe(OH) 3 @Cellulose PHFs exhibited a multiscaled pore structure, with the in situ generated Fe(OH) 3 nanoparticles uniformly distributed on the regenerated cellulose nanofibrous network of the fibers. These structural attributes are quite advantageous for an efficient adsorbent. The maximum Congo red removal capacity of the Fe(OH) 3 @Cellulose PHFs reached 689.65 mg/g, which was much higher than many early reported values. Importantly, the Fe(OH) 3 @Cellulose PHFs could favorably remove the dye at natural pH through filtration adsorption with excellent reusability. This approach, with the desired characteristics of simplicity, high efficiency, low cost, and being environmentally friendly, demonstrated a great potential for industrial applications.

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“…Thermal stability of Fe 3 O 4 NPs, TSC@Fe 3 O 4 NPs and SiO 2 @Fe 3 O 4 NPs was explored by TGA ( Figure 4). Accordingly, all samples exhibited a weight loss of 5 % -8 % below 200 o C due to desorption of adsorbed water [11,12]…”

Section: Thermal Stabilitymentioning

confidence: 99%

Synthesis and Characterization of Silica Coated Magnetic Iron Oxide Nanoparticles

Nguyen-Le

Nguyen

Rich

et al. 2019

JST

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Advances in nanotechnology in recent years has led to a number of diverse applications of nanomaterials. Magnetic iron oxide nanoparticles (Fe3O4 NPs), a representative of magnetic nanomaterials, has gained much attention of many researchers all over the world due to their unique properties such as superparamagnetism, biocompatibility and high magnetic saturation. With such properties, Fe3O4 NPs can be exploited in many fields, particularly biomedicine related fields such as cellular therapy, tissue repair, drug delivery, magnetic resonance imaging, hyperthermia and magnetofection. However, owing to their self-aggregation of Fe3O4 NPs, it is necessary to coat Fe3O4 NPs with a stable and biocompatible silica layer. Therefore, in this report, Fe3O4 NPs were synthesized via a co-precipitation method using iron (II)/ iron (III) chloride, ammonia and trisodium citrate. Then, the silica layer was coated onto Fe3O4 NPs through the hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in ethanol. The as-synthesized samples were charaterized with the infrared (IR) spectroscopy, X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results proved that silica was successfully coated on Fe3O4 NPs. The particle sizes measured by TEM were found to be about 12 nm in diameter for Fe3O4 NPs and 45 nm in diameter for silica coated Fe3O4 (SiO2@Fe3O4) NPs, while the dynamic diameters measured by DLS for Fe3O4 NPs and SiO2@Fe3O4 NPs were 15.7 and 65.8 nm, respectively. Both Fe3O4 NPs and SiO2@Fe3O4 NPs were superparamagnetic materials in which Fe3O4 NPs have higher magnetic saturation (45.8 emu/g) than the other (13.4 emu/g).This study examines the: ……...Advances in nanotechnology in recent years has led to a number of diverse applications of nanomaterials. Magnetic iron oxide nanoparticles (Fe3O4 NPs), a representative of magnetic nanomaterials, has gained much attention of many researchers all over the world due to their unique properties such as superparamagnetism, biocompatibility and high magnetic saturation. With such properties, Fe3O4 NPs can be exploited in many fields, particularly biomedicine related fields such as cellular therapy, tissue repair, drug delivery, magnetic resonance imaging, hyperthermia and magnetofection. However, owing to their self-aggregation of Fe3O4 NPs, it is necessary to coat Fe3O4 NPs with a stable and biocompatible silica layer. Therefore, in this report, Fe3O4 NPs were synthesized via a co-precipitation method using iron (II)/ iron (III) chloride, ammonia and trisodium citrate. Then, the silica layer was coated onto Fe3O4 NPs through the hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in ethanol. The as-synthesized samples were charaterized with the infrared (IR) spectroscopy, X-ray diffraction (XRD) spectroscopy, thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results proved that silica was successfully coated on Fe3O4 NPs. The particle sizes measured by TEM were found to be about 12 nm in diameter for Fe3O4 NPs and 45 nm in diameter for silica coated Fe3O4 (SiO2@Fe3O4) NPs, while the dynamic diameters measured by DLS for Fe3O4 NPs and SiO2@Fe3O4 NPs were 15.7 and 65.8 nm, respectively. Both Fe3O4 NPs and SiO2@Fe3O4 NPs were superparamagnetic materials in which Fe3O4 NPs have higher magnetic saturation (45.8 emu/g) than the other (13.4 emu/g).

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High temperature synthesis of interfacial functionalized carboxylate mesoporous TiO2 for effective adsorption of cationic dyes

Cited by 57 publications

References 53 publications

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Fabrication and Characterization of Highly Porous Fe(OH)₃@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water

Synthesis and Characterization of Silica Coated Magnetic Iron Oxide Nanoparticles

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High temperature synthesis of interfacial functionalized carboxylate mesoporous TiO2 for effective adsorption of cationic dyes

Cited by 57 publications

References 53 publications

Decolorization of Reactive Black 5 by Mesoporous Al2O3@TiO2 Nanocomposites

Decolorization of Reactive Black 5 by Mesoporous Al2O3@TiO2 Nanocomposites

Fabrication and Characterization of Highly Porous Fe(OH)3@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water

Synthesis and Characterization of Silica Coated Magnetic Iron Oxide Nanoparticles

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Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Decolorization of Reactive Black 5 by Mesoporous Al₂O₃@TiO₂ Nanocomposites

Fabrication and Characterization of Highly Porous Fe(OH)₃@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water