Self-assembled kanamycin antibiotic-inorganic microflowers and their application as a photocatalyst for the removal of organic dyes

Abstract

Construction of hybrid three-dimensional (3D) hierarchical nanostructures via self-assembly of organic and inorganic compounds have recently attracted immense interest from scientists due to their unique properties and promise in a large range of applications. In this article, hybrid flower structures were successfully constructed by self-assembly an antibiotic, kanamycin, with Cu 2+. The flower-like morphology was observed by scanning electron microscopy, to be approximately 4 µm in diameter and about 10 nm in thickness. FTIR spectroscopy and X-ray diffraction confirmed the antibiotic-inorganic hybrid structure was uniform composition, and showed crystallinity due to ordered self-assembly. The hybrid flowers showed high photocatalytic activity towards degradation of methyl blue during 240 minutes under visible light irradiation. A possible mechanism of photocatalytic activity was also proposed, that exposes the inherent advantages in using antibiotic-inorganic hybrid flowers as photocatalysts, where self-assembly can be used to generate active, high surface area structures for photodegradation of pollutants.

Wet Synthesis of Elongated Hexagonal ZnO Microstructures for Applications as Photo-Piezoelectric Catalysts

“…As reported in Figure 8, the maximum absorption of sample A is centred at 370 nm, so that relevant part of emitted photons can be absorbed by the ZnO crystals. In Figure S3, the bleaching of the maximum absorption peak of methylene blue confirms, as known in the literature [58], the photo-induced degradation of the dye. In particular, ZnO crystals of sample A (0.2 g/L) were mixed with the dye (0.01 g/L) in Milli-Q grade water, and the suspension was kept under continuous and gentle stirring and illuminated for 2 h. The maximum absorption band of methylene blue is located at about 670 nm and, at each time point, its photo-degradation was monitored by means of UV-Vis spectroscopy.…”

Single-step antibiotic-mediated synthesis of kanamycin-conjugated gold nanoparticles for broad-spectrum antibacterial applications

“…The XRD analysis is essential for providing information about the crystalline nature of nanomaterials. Kanamycin is amorphous in nature thus no sharp peak was observed (Jadhav et al 2020). In the XRD pattern of Kan-AuNPs (red line), four distinct peaks were observed at diffraction angles 38Á2, 44Á2, 31Á4 and 27Á2 which matches with the 38Á6 and 44Á4 peaks of standard AuNPs (control) (Vechia et al 2020).…”

Flower‐Like Superstructures: Structural Features, Applications and Future Perspectives

“…Taking advantage from this, recently we have self‐assembled the antibiotic kanamycin with Cu 3 (PO 4 ) 2 to produce hybrid 3D flower‐like nanostructures, and used these flower structures for the degradation of methyl blue (MB). We have studied in detail the step‐wise growth of kanamycin‐Cu 3 (PO 4 ) 2 hybrid flowers by addition of kanamycin into the PBS‐buffered Cu 2+ solution, as illustrated in Figure 21 [50] . It could be seen that the hybrid flowers initially nucleate on a small site, and then gradually propagate into the full flower‐like nanostructures via directed growth of the petals, in which amino group of kanamycin and Cu 2+ form coordinate bonds, leading to growth of the petals then shape into full hybrid flowers (Figure 21 (A−F)).…”

“…(G) Photocatalytic performance of the hybrid flowers on the degradation of methyl blue. Reprinted from [50] permitted from Sci. Rep. NPG publisher.…”