Fabrication of a zinc oxide/alginate (ZnO/Alg) bionanocomposite for enhanced dye degradation and its optimization study

Abstract

Here, we reported the synthesis of ZnO/Alg bionanocomposite and analyzed photocatalytic degradation efficiency for MB and MO dyes under UV light. We also performed optimization studies using the RSM-CCD method and obtained 98% degradation efficiency.

Biogenic Punica granatum Flower Extract Assisted ZnFe2O4 and ZnFe2O4-Cu Composites for Excellent Photocatalytic Degradation of RhB Dye

“…This process involves the conversion of RhB dye molecules into less harmful and biodegradable chemical species, such as superoxide ions (O 2− ), carbon dioxide (CO 2 ), or water (H 2 O) molecules [ 107 ]. Further, to comprehend the photocatalysis of RhB molecules, we adopted the Hinshelwood kinetic model [ 108 , 109 ]. Accordingly, Figure 11 b illustrates the representation of the photodegradation kinetics by plotting ln (A o /A t ) on the x -axis and time (min) on the y -axis.…”

Alginate@ZnCO2O4for efficient peroxymonosulfate activation towards effective rhodamine B degradation: optimization using response surface methodology

“…46,47 Moreover, the absorption bands at 1601 cm −1 and 1407 cm −1 correspond to asymmetric and symmetric stretching vibrations of the carboxylate groups (–COO–), respectively. 48 The broad peak observed at 3321 cm −1 is due to the hydroxyl (O–H) stretching vibration mode. 49 These same peaks are also present in the FTIR spectrum of the NaAlg/ZnCo 2 O 4 nanocomposite, indicating that the sodium alginate has bound to the surface of ZnCo 2 O 4 and confirming the formation of ZnCo 2 O 4 –NaAlg beads through surface modification.…”

Alginate-based hydrogels embedded with ZnO nanoparticles as highly responsive colorimetric oxygen indicators

“…36 Based on this property, alginate hydrogels have widely been used as controlled release materials, cell carriers in tissue engineering, and water retaining materials for various purposes. [36][37][38] Furthermore, alginate possesses the ability to immobilize inorganic metal oxide nanoparticles and photocatalysts such as ZnO and TiO 2 . These materials could effectively be embedded and distributed in the alginate matrix, thus ensuring their stability and efficiency as photocatalysts applied for hydrogel based-UV sensors 4 and photocatalytic degradation of toxic substances and dyes in wastewater.…”

“…These materials could effectively be embedded and distributed in the alginate matrix, thus ensuring their stability and efficiency as photocatalysts applied for hydrogel based-UV sensors 4 and photocatalytic degradation of toxic substances and dyes in wastewater. [39][40][41] We developed a hydrogel-based colorimetric oxygen indicator system prepared via the internal gelation of alginate hydrogels using divalent Zn 2+ cations. ZnO nanoparticles, which act as photocatalysts, and MB, a common redox indicator, are incorporated into the alginate hydrogel network.…”

“…These materials could effectively be embedded and distributed in the alginate matrix, thus ensuring their stability and efficiency as photocatalysts applied for hydrogel based-UV sensors 4 and photocatalytic degradation of toxic substances and dyes in wastewater. 39–41…”