Evaluation of bactericidal potential and catalytic dye degradation of multiple morphology based chitosan/polyvinylpyrrolidone-doped bismuth oxide nanostructures

Abstract

In this study, 0.02 and 0.04 wt % of chitosan (CS) was successfully incorporated in a fixed amount of polyvinylpyrrolidone (PVP)-doped Bi2O3 nanostructures (NSs) via co-precipitation approach. The purpose of...

Bactericidal Action and Industrial Dye Degradation of Graphene Oxide and Polyacrylic Acid-Doped SnO2Quantum Dots:In SilicoMolecular Docking Study

“…The nanocatalyst surface in the basic medium tends to acquire a negative charge, while the absorption of cationic adsorbate species in acidic media is hindered by the positively charged surfaces of catalysts. 65 The charge on the catalyst surface developed gradually became negative as pH was raised, boosting the adsorption ability of cationic dyes on SnO 2 and GO/PAA-SnO 2 nanocatalysts. The bactericidal potential of pure and doped SnO 2 was evaluated through an agar well diffusion approach.…”

Comparative Study of Sonophotocatalytic, Photocatalytic, and Catalytic Activities of Magnesium and Chitosan-Doped Tin Oxide Quantum Dots

“… 37 Moreover, the CA of SnO 2 is enhanced by adding CS, which is attributed to possessing a large number of active sites. 36 The result indicated that 4% Mg/CS-doped SnO 2 shows optimum (99%) sonophotocatalytic degradation of MB in basic medium compared to photocatalytic and catalytic degradation. From these outcomes, we deduce that SnO 2 QDs proved to be an excellent material for the degradation of the MB dye by the sonophotocatalysis process.…”

“…Simultaneously, more dye molecules are absorbed on the surfaces of Mg/CS-doped SnO 2 that enhance dye reduction . Moreover, the CA of SnO 2 is enhanced by adding CS, which is attributed to possessing a large number of active sites . The result indicated that 4% Mg/CS-doped SnO 2 shows optimum (99%) sonophotocatalytic degradation of MB in basic medium compared to photocatalytic and catalytic degradation.…”

“…For semiconductor nanostructures, particle size reduction causes the absorption band to move toward the larger energy, attributed to the quantum confinement effect. Consequently, the absorption band of SnO 2 observed at 263 nm corresponds to the n−σ* electronic transition. , Tauc′s relation has been used to calculate the Eg as 3.63, 3.56, 3.47, and 3.38 eV for SnO 2 and (2%, 4%) Mg/CS-doped QDs, as elaborated in Figure b . Upon doping of Mg and CS, absorption enhanced toward a higher wavelength (red shift), representing a reduction in Eg because of a larger concentration of oxygen vacancies in SnO 2 .…”

Preparation and application of (Cu2O‐Ag)@TA composite nanomaterials with enhanced stability and photocatalytic antibacterial activity

“…[1][2][3] In recent years, inorganic nanomaterials with unique shapes and sizes have received a lot of attention in several fields such as catalysis, dye degradation, and antibacterial properties due to their unique properties. [4][5][6] Among them, the development of various metal oxides including ZnO, [7] Ag 2 O, [8] CuO, [9] TiO 2 , [10] MgO, [11] NiO, [12] and other nanoparticles and their composites has provided more possibilities to explore the antibacterial properties. Additionally, it has been shown that the addition of inorganic nanoparticles can retard the growth of pathogenic bacteria, being of great significance as the active ingredient in food packaging.…”