Development of a Novel Mixed Titanium, Silver Oxide Polyacrylonitrile Nanofiber as a Superior Adsorbent and its Application for MB Removal in Wastewater Treatment

Abstract

In this study, a novel electrospun nanofibrous composite was synthesized from polyacrylonitrile (PAN) and well-dispersed oxide nanoparticles containing Ti and Ag (PAN-TA). The nanoparticles incorporated into the nanofibers can endow the composite with photocatalytic and antimicrobial ability. The morphologies and structure of the nanofibers were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). Controlled experiments were carried out with the effects of chemical modification, solution pH, temperature, dosage, contact time, and initial concentration of the dye. The methylene blue (MB) dye was completely removed within 20 min at room temperature 25 o C with high maximum retention capacity of 155.4 mg g -1 . Moreover, equilibrium data and kinetics data indicated that the dye adsorption agreed well with the Langmuir isotherm model and pseudo-second order model, respectively. In addition, the nanofibers could be easily separated from dye solution and showed high reusability for numerous repeat cycles, thus indicating good application prospects for the wastewater treatment.

In-Situ Preparation of Three Types of Noble Metal Nanoparticles-Polyacrylonitrile Nanofibers (NM NPs-PAN NFs, M = Pt, Au, and Ag) Using Electrospinning Technique Assisted with Ultrasound Irradiation

“…The XRD patterns of the samples (PAN NFs, and NM NPs-PAN NFs; M = Pt, Au and Ag) were depicted in Figure 1. The PAN NFs a single unique and a broad peak diffraction with hexagonal lattice is observed at 2θ = 17.84°, which are in good agreement with the results reported by Xu et al [15]. Another two peaks at 17.22 and 27.06° can be related to the amorphous structure of these polymer nanofibers.…”

“…According to Table 1 and Figure 1, XRD data well indicate evidence for the successful rapid in-situ synthesis of PAN nanofibers loaded with noble metal nanoparticles. The intensity diffraction peaks of a polymer is larger than those diffraction peaks of a metal because the corresponding peaks of metals were covered by the polymer peaks [15]. 1 This hexagonal structure can be indexed to its crystalline data (JCPDS card no.…”

Cyclodextrin/Graphene-Based Porous Carbon Nanofibers with Embedded MnO2 Nanoparticles for Supercapacitor Applications

“…Furthermore, the intensity of the crystalline peak at 17° decreases in the order of PMnG­(α)-NF > PMnG­(β)-NF > PMnG­(γ)-NF, which means that the PMnG­(γ)-NF enhances the amorphous phase of PAN. These results suggest that the inclusion complex in PMnG­(γ)-NF interferes with the crystallization behavior of PAN, resulting in the decreased crystallinity of PMnG­(γ)-NF than those of other NFs . DSC is another useful tool to confirm the size match of γ-CD and MnCl 2 .…”

Electroosmotic flow driven microfluidic device for bacteria isolation using magnetic microbeads

“…In this case 1/n represents the strength of the attraction to the magnet and is similar when comparing the constant and switching flow cases. Meanwhile, k f represents the extent of the attraction, with the switching flow case showing a much greater value due to the returning of uncaptured beads, resulting in an increased pixel count 25–27 . The use of the Freundlich model accounts for the asymptotic trend shown in the calibration curve due to the rough surface, non-ideal interactions, and potential overlapping of mMBs and mMB- E. coli * complexes in the system.…”