Ion exchange synthesis of PAN/Ag₃PO₄core–shell nanofibers with enhanced photocatalytic properties

Abstract

PAN/Ag 3 PO 4 core-shell hetero-nanofibers have been fabricated for the first time by combining electrospinning technology with ion exchange reaction, which exhibit much higher visible light driven photocatalytic activities for the degradation of organic contaminants than pure Ag 3 PO 4 nanoparticles.One-dimensional (1D) nanostructures have received extensive attention owing to their potential applications in photoconductors, electron eld emitters, and solar cells in the past decade. 1-4 Recently, the rational design and synthesis of polymer-inorganic 1D nanohybrids have become of particular interest because of their novel multifunctional physical and chemical properties as well as their potential advantages in photonics, electronics, catalysis and magnetism. Compared with other fabrication methods, electrospinning offers a relatively simple and versatile method to generate such 1D nanostructures with controlled morphology and composition. Up to now, many inorganic nanoparticles such as pure metal, metal oxides and metal suldes have been incorporated to various polymer matrices by combining the electrospinning technique with other strategies, such as direct-dispersion, 5 in situ photoreduction, 6 gas-solid reaction, 7 and sol-gel method. 8 However, note that some limitations still remain in the present two-step approaches, including the uncontrollable arrangement between polymer and inorganic phases, the incomplete coating, and limitations of the hetero-product species. Thus, the exploration of a general and efficient method for the generation of the polymer-inorganic composite nanobers with well dispersed inorganic nanoparticles on the polymer matrix is still a great challenge.Compared with other materials, Ag 3 PO 4 has recently attracted particular attention owing to its excellent photooxidative capabilities for O 2 evolution from water as well as organic dye decomposition under visible light irradiation. 9 However, the present efforts mostly focus on the fabrication of inorganic/ Ag 3 PO 4 hetero-structures, including etc. Moreover, the as-prepared hetero-structures were generally obtained by randomly combining inorganics with Ag 3 PO 4 , which mostly possessed of uncontrollable combinations and irregular structures. Thereby, the rational design and fabrication of well-dened polymer-Ag 3 PO 4 composite nanobers may greatly improve their current photochemical reactivity and open up new applications.Herein, we demonstrated an interesting and simple strategy by combining electrospinning technology with ion exchange reaction for preparing uniform polyacrylonitrile (PAN)/Ag 3 PO 4 core-shell hetero-nanobers. Furthermore, the compositions, structures, and morphologies of the hybrid nanobers could be rationally tailored by simply adjusting the synthetic parameters. Moreover, the studies of photocatalytic performance have clearly revealed that the as-prepared PAN/Ag 3 PO 4 core-shell nanobers exhibited superior photocatalytic properties for the degradation of organic contaminants than pure Ag 3 PO 4 nanoparti...

Synthesis and characterization of Ag3PO4 immobilized with graphene oxide (GO) for enhanced photocatalytic activity and stability over 2,4-dichlorophenol under visible light irradiation

“…9(a).The 15 resultsshow that the degradation efficiency of Ag 3 PO 4 -GO (5%) relative to 16 2,4-DCPafter four times recyclingwas rather stable andremained about91.77%, which 17 is much higher than that of the pure Ag 3 PO 4 (approximately 34.78%) in this study. 18 Meanwhile,this value is also much higher thanthe degradation efficiency of orange On the basis of the results described above, the photocatalytic mechanism of the 6 composite photocatalyst Ag 3 PO 4 -GOwas proposed, as shown in Fig. 10(c).…”

“…In 16 each experiment, 25 mg of photocatalyst was added to a 50 mL 2,4-DCP solution 17 ataninitial concentration of 20 mg/L. Prior to illumination,the solution was18 magnetically stirred in the dark for 30 min to reachthe adsorption-desorption 19 equilibrium of2,4-DCPon the surface of thephotocatalyst. Then, the solution was 20 exposed to Xe lamp irradiation.…”

Synthesis and characterization of photocatalytic and antibacterial PAN/Ag2CO3 composite nanofibers by ion exchange method

“…PAN nanofiber shows the characteristic absorption peaks of the nitrile group at around 2241 cm -1 , besides, a series of characteristic bands in the regions 2930 cm -1 , 1451 cm -1 , 1380-1360 cm -1 , and 1290-1260 cm -1 are ascribed to the vibrations of different modes in methylene group of PAN. The characteristic absorption band of CO 3 2− could be observed at 705 cm -1 , indicating the formation of the Ag 2 CO 3 on the PAN/Ag 2 CO 3 nanofiber [19,30].…”

“…Furthermore, PAN-based electrospun nanofiber has been used as reusable catalyst due to its hydrophobicity, low density, and high environmental stability properties [19]. In the PAN/Ag 2 CO 3 composite nanofiber, PAN act as a polymer template and Ag 2 CO 3 nanoparticles have been exposed completely and densely on the fiber surface without agglomeration, thus they could share the photo-excited electrons and achieve novel collective photocatalytic and antibacterial properties.…”

Photocatalytic degradation and antibacterial investigation of nano synthesized Ag3VO4particles @PAN nanofibers

“…For this scenario, electrospinning, a simple and versatile technique, has been investigated for the fabrication of organic-inorganic nanofibers having prominent features such as high specific surface area and large aspect ratio. Numerous polymer nanofibers have been fabricated by the electrospinning technique, but polyacrylonitrile (PAN) has been frequently used as reusable catalyst due to its hydrophobicity, low density, and high environmental stability properties [36,37].…”