Electrospun Self-Standing Membrane of Hierarchical SiO₂@γ-AlOOH (Boehmite) Core/Sheath Fibers for Water Remediation

Abstract

Hierarchical SiO(2)@γ-AlOOH (Boehmite) core/sheath fibers are fabricated based on a combination of electrospinning and hydrothermal reaction. γ-AlOOH (Boehmite) nanoplatelets are uniformly anchored on the surface of SiO(2) fibers, which significantly improves the adsorption efficiency of the SiO(2) fiber membrane for organic dyes and microorganisms. Compared to conventional nanoparticle adsorbents, the self-standing membrane thus prepared is highly flexible and easy to handle and retrieve, making it a promising material for water treatment. By virtue of electrospinning and a hydrothermal reaction, it provides possibilities to fabricate other functional fiber membranes with hierarchical structures, which can find potential applications in adsorption, catalysis, filtration, and other environmental remediation fields.

BiOX (X=Cl, Br, I) nanostructures: Mannitol-mediated microwave synthesis, visible light photocatalytic performance, and Cr(VI) removal capacity

“…Contamination of water with organic dyes and heavy metal ions has become a severe environmental problem; thereby, considerable effort has been made to develop advanced methods for water purification [1,2]. As an effective approach, photocatalysis and adsorption have been extensively employed in water treatment, where a variety of advanced nanomaterials have been studied as promising photocatalysts and adsorbents.…”

Processable graphene oxide-embedded titanate nanofiber membranes with improved filtration performance

“…Despite of these advantages, the interconnected and open channels in fiber-based films are relatively large [5][6][7][8], which makes such membranes suffer a lot from poor retention efficiency and selectivity, limiting their potential applications in separation fields, especially in organic wastewater purification [9][10][11][12]. Generally, the permeation properties of fiber membranes can be improved by surface modification (for example, adsorption properties) [13,14] and the structural adjustment of the pores/channels [15][16][17]. In addition to enhancing the adsorption capacity, modification of pore/channel structures could be an alternative and effective strategy to improve the retention ability of these films [18,19].…”

Adsorbents Based on Electrospun Nanofibers

“…Moreover, the adsorptions of dyes were fitted better with Redlich-Peterson model compared with the Langmuir and Freundlich isotherm, while the adsorption kinetics were fitted with pseudo-second-order and pseudo-first-order model, relatively. By combination of electrospinning and hydrothermal reaction, the hierarchical SiO 2 /"-AlOOH (boehmite) core/sheath nanofibers are fabricated to adsorb Congo red from the water [91]. Compared to the boehmite powder, the self-standing membranes thus prepared are highly flexible, easy to handle, and retrievable ( Fig.…”