Hierarchical nanocomposites of chitosan crosslinked with glutaraldehyde for the photodegradation of Rhodamine B and sensor activity against Diclofenac

• Published in: Journal of materials science. Materials in electronics 2023, Vol.34 (1), p.18, Article 18
• Main Authors: Rai, Mansi, Nema, Ankita, Dangi, Sambhavna Singh, Shrivastava, Kavya, Khan, Farid
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Chitosan; Dextrans; Diclofenac; Electrodes; Electron microscopy; Fourier transforms; Glutaraldehyde; Infrared spectroscopy; Materials Science; Nanocomposites; Nanoparticles; Nonsteroidal anti-inflammatory drugs; Optical and Electronic Materials; Photocatalysis; Photodegradation; Radiation; Rhodamine; Scanning electron microscopy; Sensors; Sodium; Titanium dioxide; X ray powder diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-09434-9

Nanocomposites of Chitosan/Glutaraldehyde (Chit./Glut.) were fabricated using dissipative convective process followed by freeze drying method adding dextran as structural directing agents and reinforcing agents such as TiO 2 and Si Nanoparticles. The as-synthesized composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, Powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Mechanical strength. Composites bear significant load with the increase of stress except in the case of Chit./TiO 2 /Glut. which is fragile and showed cracks. Composites were also used as catalysts for the degradation of toxic dye Rhodamine B in 1.5-min claiming rate constant 0.93 min −1 . Chit./Dex/SiO 2 NPs/Glut. composite worked successfully as sensor against Diclofenac in the presence phosphate buffer at pH 4 with limit of detection (LOD) 0.354 ng mL −1 and limit of quantization (LOQ) 0.654 ng mL −1 , respectively.