Optimization of ZnO Nanoparticles’ Synthesis via Precipitation Method Applying Taguchi Robust Design

Catalysts, Год журнала: 2023, Номер 13(10), С. 1367 - 1367

Опубликована: Окт. 13, 2023

Zinc oxide (ZnO) possesses exceptional potential to be utilized in water and wastewater treatment applications, either as a photocatalyst or membrane incorporation. In the present study, ZnO nanoparticles were synthesized using precipitation method. The Taguchi approach with L32b orthogonal array was order optimize experimental conditions for synthesis of ensure that relatively smaller-sized particles obtained. design characterized by ten factors, where nine them possessed four levels, while one had two levels. This study’s factors type Zn precursor, concentration precipitating agent, agent’s concentration, solvent, pH value temperature used during synthetic procedure, calcination temperature, time stirring synthesis, well speed. influences those on selected response parameters (the average crystallite size, degree crystallinity, energy band gap (Eg), photodegradation constant (k)) then evaluated. XRD analysis calculated Eg values indicated hexagonal wurtzite structure only crystalline phase produced samples. photocatalytic efficiency all examined degradation rhodamine B under UV light irradiation. optimal achieved zinc acetate dihydrate precursor at equal 0.3 M, sodium hydroxide agent (1.5 M), methanol solvent 13), procedure 70 °C, 600 °C 90 min time, 700 rpm optimized sample based aforementioned thoroughly characterized. acquired results confirmed prediction approach, most enhanced k-value observed.

Язык: Английский

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Green Synthesis of TiO₂ Using Impatiens rothii Hook.f. Leaf Extract for Efficient Removal of Methylene Blue Dye

ACS Omega, Год журнала: 2023, Номер 8(46), С. 43999 - 44012

Опубликована: Ноя. 10, 2023

In this work, TiO2 nanoparticles (NPs) were effectively synthesized by a green method using the Impatiens rothii Hook.f. leaf (IL) extract as capping and reducing agent. The as-synthesized NPs characterized different characterization methods such Brunauer–Emmett–Teller (BET) analysis, high-resolution transmission electron microscopy (HRTEM), scanning (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR), photoelectron (XPS), diffused reflectance (DRS), diffraction (XRD) Raman spectroscopy. specific surface area from BET analysis was found to be 65 m2/g. average crystallite size XRD particle SEM ∼11 ∼25 nm, respectively. results showed that biosynthesized (IL–TiO2) purely anatase phase. XPS illustrated formation of Titania with an oxidation state +4. DRS study showcased blue-shifted intense absorption peak IL–TiO2 (3.39 eV) compared bulk material reported in literature (3.2 eV). HRTEM micrograph presence grain boundary d spacings 0.352, 0.245, 0.190, which correspond lattice planes (101), (004), (200), From EDX weight percents titanium oxygen 54.33 45.67%, photoinduced degradation methylene blue (MB) dye investigated IL-TiO2 photocatalyst. effect parameters like catalyst dosage (30 mg/L), initial concentration MB (15 ppm), pH (10.5), contact time (100 min) on removal efficiency optimized. maximum photodegradation under optimized conditions 98%.

Язык: Английский

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A novel route to fabricate ZnO nanoparticles using Xanthium indicum ethanolic leaf extract: Green nanosynthesis perspective towards photocatalytic and biological applications

Journal of Molecular Structure, Год журнала: 2023, Номер 1300, С. 137227 - 137227

Опубликована: Дек. 1, 2023

Язык: Английский

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Biosynthesis of ZnO using Senna siamea leaf extract for photodegradation of tetracycline antibiotic and azo dye in wastewater

OpenNano, Год журнала: 2024, Номер 16, С. 100202 - 100202

Опубликована: Март 1, 2024

The green fabrication of photocatalyst is an interesting research topic owing to the beneficials non-toxicity, simplicity, and environmentally friendly. In this research, we report biosynthesis ZnO by a hydrothermal/solvothermal method with addition leaf extract (using either water or ethanol as solvent) Senna siamea.. prepared was used for removal tetracycline (TC) antibiotic reactive red 141 (RR141) azo dye. complete degradation pollutant achieved under both UV light (120 min) sunlight (40 min). ZnO-SV400, solvothermally grown using then calcined at 400 °C, showed promising photoactivity assigning increment photogenerated charge carrier separation capacity high crystallinity sample after thermal treatment. reaction follows nicely first-order rate constant 0.081 min−1. result shows that hydroxyl radicals are key spices involved in detoxification contaminants. recycling ability about five cycles reported. structural stability also confirmed. strategy presented here demonstrates synthesis plant extracts main parameter governing sunlight-active toxic contaminants including organic dyes antibiotics wastewater.

Язык: Английский

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Superior antibacterial performance of surfactant-assisted ZnO nanoflakes produced via Co-precipitation method

Chemical Physics Letters, Год журнала: 2024, Номер 846, С. 141318 - 141318

Опубликована: Май 6, 2024

Язык: Английский

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