Synthesis of silica nanoparticles from sodium silicate under alkaline conditions

Zulfiqar, Usama; Subhani, Tayyab; Husain, Syed Wilayat

doi:10.1007/s10971-015-3950-7

Cited by 91 publications

(40 citation statements)

References 15 publications

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“…However, although the particle size distribution became broader due to the effect of alcohol chain, the monodisperse and uniform-sized particles were obtained in the ethanol (Figure 2b). This result also aligns with the previous reports, indicating that ethanol plays a major role in the impact of silica nanoparticles on monodispersity and narrow size distribution [26,28]. Interestingly, the particle size distribution of the silica nanoparticles synthesized in the methanol (Figure 2a) revealed poor uniformity.…”

Section: Resultssupporting

confidence: 92%

“…As mentioned above, sol-gel is a synthesis method that is suitable for industrial manufacturing due to its simplicity, homogeneity, and refined result. The importance of the sol-gel process in the formation of the silica particle structure has been studied by Zulfiqar et al [26], who synthesized silica nanoparticles from a sodium silicate solution using sol-gel under alkaline conditions to prevent agglomeration. The results showed that the sizes of the silica nanoparticles could be decreased by increasing the pH in the reaction system.…”

Section: Introductionmentioning

confidence: 99%

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A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Ismail

Saputri

Dwiatmoko

et al. 2021

Journal of Asian Ceramic Societies

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We present a facile method to produce silica nanoparticles as a superhydrophobic material which has been successfully synthesized by mechanical milling and the sol-gel method. The powder obtained was characterized using scanning electronic microscopy, X-Ray Diffraction, particle size distribution, and zeta potential. The effects of alcohol solvents on synthesis, such as on particle size, particle size distribution, and zeta potential, were examined thoroughly. To evaluate the surface modification of silica nanoparticles from hydrophilic to hydrophobic properties, IR spectra was applied. Surface modification was conducted prior to the evaluation of the superhydrophobic properties of silica nanoparticles on the glass substrate. In this study, silica nanoparticles in the ethanol solvent achieved optimum results with a particle size of 170.3 ± 14.3 nm and the highest zeta potential of −50.4 ± 0.3 mV, which is the best superhydrophobic effect on the glass substrate. In addition, the superhydrophobic effect of the silica nanoparticles was also applied to the bitumen, as both coating and mixing with the water contact angle was increased to 149.2° and 148.1° compared to the bitumen without silica nanoparticles. Due to their simplicity and low-cost, modified silica nanoparticles show great potential for industrial applications as superhydrophobic material on the bitumen.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Ismail

Saputri

Dwiatmoko

et al. 2021

Journal of Asian Ceramic Societies

View full text Add to dashboard Cite

show abstract

“…In order to obtain the silica-coated Fe

nanoparticles, 10 mg of mesoporous silica nanoparticles was dissolved in 150

L of 1 M sodium hydroxide [ 54 ], and the resulting solution was sonicated for 15 min at a temperature of 60

C. The previously obtained suspension of nanoparticles in an aqueous solution of sodium hydroxide was shaken and 20 mL was collected (approximately 120 mg of iron oxide). Then, 30

L of dissolved silica was added dropwise (2 mg per 20 mL of suspension) and mixed for 40 min at a speed of 1000 rpm.…”

Section: Methodsmentioning

confidence: 99%

Filtration of Nanoparticle Agglomerates in Aqueous Colloidal Suspensions Exposed to an External Radio-Frequency Magnetic Field

et al. 2021

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The study investigated the phenomenon of the fast aggregation of single-domain magnetic iron oxide nanoparticles in stable aqueous colloidal suspensions due to the presence of a radio-frequency (RF) magnetic field. Single-domain nanoparticles have specific magnetic properties, especially the unique property of absorbing the energy of such a field and releasing it in the form of heat. The localized heating causes the colloid to become unstable, leading to faster agglomeration of nanoparticles and, consequently, to rapid sedimentation. It has been shown that the destabilization of a stable magnetic nanoparticle colloid by the RF magnetic field can be used for the controlled filtration of larger agglomerates of the colloid solution. Two particular cases of stable colloidal suspensions were considered: a suspension of the bare nanoparticles in an alkaline solution and the silica-stabilized nanoparticles in a neutral solution. The obtained results are important primarily for biomedical applications and wastewater treatment.

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“…This synthesis protocol has now been fine-tuned to suit user-specific requirements (Rao et al, 2005 ). In addition to TEOS, other low-cost precursors such as sodium silicate solution (SSS) have been used (Zulfiqar et al, 2016a , b ). The surface of these nanoparticles is rich in silanol groups which can be used as an anchor for surface modifications with organosilane coupling agents such as (3-aminopropyl) triethoxysilane (APTES) and (3-mercaptopropyl) trimethoxysilane (MPTMS) (Sterman and Marsden, 1966 ), to enable loading and adsorption of biomolecules.…”

Section: Silica Nanoparticles: Synthesis and Propertiesmentioning

confidence: 99%

Silica Nanoparticles—A Versatile Tool for the Treatment of Bacterial Infections

2020

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The rapid emergence of drug resistance continues to outpace the development of new antibiotics in the treatment of infectious diseases. Conventional therapy is currently limited by drug access issues such as low intracellular drug accumulations, drug efflux by efflux pumps and/or enzymatic degradation. To improve access, targeted delivery using nanocarriers could provide the quantum leap in intracellular drug transport and retention. Silica nanoparticles (SiNPs) with crucial advantages such as large surface area, ease-of-functionalization, and biocompatibility, are one of the most commonly used nanoparticles in drug delivery applications. A porous variant, called the mesoporous silica nanoparticles (MSN), also confers additional amenities such as tunable pore size and volume, leading to high drug loading capacity. In the context of bacterial infections, SiNPs and its variants can act as a powerful tool for the targeted delivery of antimicrobials, potentially reducing the impact of high drug dosage and its side effects. In this review, we will provide an overview of SiNPs synthesis, its structural proficiency which is critical in loading and conjugation of antimicrobials and its role in different antimicrobial applications with emphasis on intracellular drug targeting in anti-tuberculosis therapy, nitric oxide delivery, and metal nanocomposites. The role of SiNPs in antibiofilm coatings will also be covered in the context of nosocomial infections and surgical implants.

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Synthesis of silica nanoparticles from sodium silicate under alkaline conditions

Cited by 91 publications

References 15 publications

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Filtration of Nanoparticle Agglomerates in Aqueous Colloidal Suspensions Exposed to an External Radio-Frequency Magnetic Field

Silica Nanoparticles—A Versatile Tool for the Treatment of Bacterial Infections

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