Anionic/nonionic surfactants for controlled synthesis of highly concentrated sub-50 nm polystyrene spheres

Najjar, Taher Al; Allam, Nageh K.; Sawy, Ehab N. El

doi:10.1039/d1na00438g

Cited by 13 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum recorded Li + adsorption capacity with the q e values as mentioned in Figure 5b was 0.72 mg/g, 1.34 mg/g, 2.15 mg/g, and 1.97 mg/g for the CaO-NPs, Ag-CaO-NPs, PVP@Ag-CaO, and SDS@Ag-CaO nanocomposites, respectively. The highest Li + adsorption potential was recorded at pH 10 for the SDS@Ag-CaO nanocomposites compared to PVP@Ag-CaO, which may be due to several reasons: (i) the anionic nature of SDS (anionic surfactant), whereas PVP is a non-ionic surfactant, and (ii) the presence of a very strong negatively charged sulfonate group in SDS, which is not present in the PVP surfactant [66]. Zheng et al [67] reported a similar type of pH effect trend by using the designed lanthanide-doped ion sieves.…”

Section: Effect Of Ph On LI + Adsorption Performancementioning

confidence: 96%

Surfactant-Capped Silver-Doped Calcium Oxide Nanocomposite: Efficient Sorbents for Rapid Lithium Uptake and Recovery from Aqueous Media

Kamran,

Jamal,

Siddiqui

et al. 2023

Water

View full text Add to dashboard Cite

The demand for lithium is constantly increasing due to its wide range of uses in an excessive number of industrial applications. Typically, expensive lithium-based chemicals (LiOH, LiCl, LiNO3, etc.) have been used to fabricate adsorbents (i.e., lithium manganese oxide) for lithium ion (Li+) adsorption from aqueous sources. This type of lithium-based adsorbent does not seem to be very effective in recovering Li+ from water from an economic point of view. In this study, an innovative nanocomposite for Li+ adsorption was investigated for the first time, which eliminates the use of lithium-based chemicals for preparation. Here, calcium oxide nanoparticles (CaO-NPs), silver-doped CaO nanoparticles (Ag-CaO-NPs), and surfactant (polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS))-modified Ag-CaO (PVP@Ag-CaO and SDS@Ag-CaO) nanocomposites were designed by the chemical co-precipitation method. The PVP and SDS surfactants acted as stabilizing and capping agents to enhance the Li+ adsorption and recovery performance. The physicochemical properties of the designed samples (morphology, size, surface functionality, and crystallinity) were also investigated. Under optimized pH (10), contact time (8 h), and initial Li+ concentration (2 mg L−1), the highest Li+ adsorption efficiencies recorded by SDS@Ag-CaO and PVP@Ag-CaO were 3.28 mg/g and 2.99 mg/g, respectively. The nature of the Li+ adsorption process was examined by non-linear kinetic and isothermal studies, which revealed that the experimental data were best fit by the pseudo-first-order and Langmuir models. Furthermore, it was observed that the SDS@Ag-CaO nanocomposite exhibited the highest Li+ recovery potential (91%) compared to PVP@Ag-CaO (85%), Ag-CaO NPs (61%), and CaO NPs (43%), which demonstrates their regeneration potential. Therefore, this type of innovative adsorbents can provide new insights for the development of surfactant-capped nanocomposites for enhanced Li+ metal recovery from wastewater.

show abstract

Section: Effect Of Ph On LI + Adsorption Performancementioning

confidence: 96%

Surfactant-Capped Silver-Doped Calcium Oxide Nanocomposite: Efficient Sorbents for Rapid Lithium Uptake and Recovery from Aqueous Media

Kamran,

Jamal,

Siddiqui

et al. 2023

Water

View full text Add to dashboard Cite

show abstract

“…Liu et al extended the classical Stöber method that is most commonly used in preparing inorganic nanospheres to synthesize the resorcinol formaldehyde (RF) resin monodisperse spheres [49]. Al Najjar et al refined the reaction parameters of emulsion polymerization and obtained a high concentration of PS monodisperse spheres without any filtration or centrifuging [50]. Wang and coworkers reported a solvent/antisolvent self-assembly method that narrowed down the dispersion of lignin spheres [51].…”

Section: Polymer Spheresmentioning

confidence: 99%

From Self-Assembly of Colloidal Crystals toward Ordered Porous Layer Interferometry

Wan

Qian

2023

Biosensors

View full text Add to dashboard Cite

Interferometry-based, reflectometric, label-free biosensors have made significant progress in the analysis of molecular interactions after years of development. The design of interference substrates is a key research topic for these biosensors, and many studies have focused on porous films prepared by top-down methods such as porous silicon and anodic aluminum oxide. Lately, more research has been conducted on ordered porous layer interferometry (OPLI), which uses ordered porous colloidal crystal films as interference substrates. These films are made using self-assembly techniques, which is the bottom-up approach. They also offer several advantages for biosensing applications, such as budget cost, adjustable porosity, and high structural consistency. This review will briefly explain the fundamental components of self-assembled materials and thoroughly discuss various self-assembly techniques in depth. We will also summarize the latest studies that used the OPLI technique for label-free biosensing applications and divide them into several aspects for further discussion. Then, we will comprehensively evaluate the strengths and weaknesses of self-assembly techniques and discuss possible future research directions. Finally, we will outlook the upcoming challenges and opportunities for label-free biosensing using the OPLI technique.

show abstract

Free‐radical emulsion copolymerization of styrene/1‐hexene in an autoclave: Synthesis and property evaluation

Remanan,

Al‐Harthi

2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

A copolymer based on styrene and 1‐hexene was synthesized using free‐radical emulsion polymerization. Reaction pressure has a significant influence on copolymer formation. There was a phase separation when styrene was copolymerized with 1‐hexene at lower pressure (1 bar) and a stable emulsion was observed under a pressurized reaction (4.5 bar). Additionally, a phase separation was also observed at a lower reaction pH (7.2) and was evidenced by the reduced pH value at the end of the copolymerization. H1 nuclear magnetic resonance (NMR) spectroscopy analysis showed the disappearance of methylene proton peak intensities in both styrene and 1‐hexene after the copolymerization reaction indicating the increased conversion of monomers in emulsion. Synthesized copolymer was also studied using the C13 NMR analysis. It was further analyzed by Fourier transform infrared spectroscopy (FT‐IR) and X‐ray photoelectron spectroscopy (XPS). The emulsion was destabilized by the synergistic action of acid and temperature to recover solid polymer. The applicability of the copolymer as a polymer modifier was studied by blending with commercial PS. Copolymer thermal properties were analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Other properties such as emulsion particle size, droplet morphology, and the effect of pH were also investigated in this study.

show abstract

Anionic/nonionic surfactants for controlled synthesis of highly concentrated sub-50 nm polystyrene spheres

Abstract: Polystyrene nanospheres are of great importance in 3D hard templating along with many other fields like pharmaceuticals and coatings. Therefore, it is important to be able to prepare polystyrene beads...

Cited by 13 publications

References 38 publications

Surfactant-Capped Silver-Doped Calcium Oxide Nanocomposite: Efficient Sorbents for Rapid Lithium Uptake and Recovery from Aqueous Media

Surfactant-Capped Silver-Doped Calcium Oxide Nanocomposite: Efficient Sorbents for Rapid Lithium Uptake and Recovery from Aqueous Media

From Self-Assembly of Colloidal Crystals toward Ordered Porous Layer Interferometry

Free‐radical emulsion copolymerization of styrene/1‐hexene in an autoclave: Synthesis and property evaluation

Contact Info

Product

Resources

About