Maneuvering the ordered mesoporosity of electrospun silica nanofibers for water harvesting

Kim, Soyoung; Park, Hosik; Choi, Heechul

doi:10.1016/j.micromeso.2019.02.037

Cited by 18 publications

(9 citation statements)

References 47 publications

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“…For this purpose, dye solution was added with the adsorbent at 298 K. The dye concentration was measured at various time intervals (15-480 min). The adsorption capacity was calculated using Equation (1) and the percentage removal efficiency was calculated using Equation (2). Equation variables were defined where Q e is the maximum capacity (mg g −1 ), C 0 and C f are initial and final dye concentrations, respectively, V is the volume of the dye solution (L) and m is the amount of the adsorbent (mg).…”

Section: Adsorption Evaluationmentioning

confidence: 99%

“…In recent years, silica nanofibers with a mesoporous structure have attracted considerable attention due to their high surface area, high pore volume and large pore size [1][2][3]. These physical properties are essential for many applications.…”

Section: Introductionmentioning

confidence: 99%

“…There are several techniques for the production of silica nanofibers, such as electrospinning (ES) [1,2] centrifugal jet spinning (CJS) [10], and solution blow spinning (SBS) [11,12]. In general, most spinning techniques used to synthesize silica nanofibers involve a sol-gel procedure that is intimately dependent on the precursor solution/sol properties and the polymeric aids used.…”

Section: Introductionmentioning

confidence: 99%

“…Typically, the mesoporous structure of the fibers can be obtained by using a template or surfactant as structure directing agent. The most common surfactants include pluronic P123 [1,7,16] and cetyltrimethylammonium bromide (CTAB) [2,17,18]. They are efficient in producing mesopore structures in several oxide nanofibers.…”

Section: Introductionmentioning

confidence: 99%

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Solution Blow Spun Silica Nanofibers: Influence of Polymeric Additives on the Physical Properties and Dye Adsorption Capacity

et al. 2021

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The physical properties of porous silica nanofibers are an important factor that impacts their performance in various applications. In this study, porous silica nanofibers were produced via solution blow spinning (SBS) from a silica precursor/polymer solution. Two polyvinylpyrrolidone (PVP, Mw = 360,000 and 1,300,000) were chosen as spinning aids in order to create different pore properties. The effect of their physical properties on the adsorption of methylene blue (MB) in an aqueous solution was explored. After forming, the nanofibers were calcined to remove the organic phase and create pores. The calcined nanofibers had a large amount of micro and mesopores without the use of additional surfactants. The molecular weight of the PVP impacted the growth of silica particles and consequently the pore size. High Mw PVP inhibited the growth of silica particles, resulting in a large volume of micropores. On the other hand, silica nanofibers with a high fraction of mesopores were obtained using the lower Mw PVP. These results demonstrate a simple method of producing blow spun silica nanofibers with defined variations of pore sizes by varying only the molecular weight of the PVP. In the adsorption process, the accessible mesopores improved the adsorption performance of large MB molecules.

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Section: Adsorption Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solution Blow Spun Silica Nanofibers: Influence of Polymeric Additives on the Physical Properties and Dye Adsorption Capacity

et al. 2021

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“…Mesoporous fibers of other oxides like silica were also obtained with the EISA adapted approach [43,44]. Besides, it has been noticed that ordered mesostructures are difficult to achieve with this approach [45], and that only a careful tuning of the electrospinning and evaporation conditions allows to increase the degree of ordering [46].…”

Section: Introductionmentioning

confidence: 99%