Characterization and performance evaluation of synthesized ZnO nanoflowers, nanorods, and their hybrid nanocomposites with graphene oxide for degradation of Orange G

Garg, Renuka; Gupta, Renuka; Singh, Nirmal; Bansal, Ajay

doi:10.1007/s11356-021-14511-3

Cited by 24 publications

(6 citation statements)

References 53 publications

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“…The electrical energy consumption is the important contributor in the operating cost of the process. Therefore, the electrical energy per order

EE / O = \frac{P * t * 1000}{V * 60 * \log \frac{C_{o}}{bold-italicC}}

was calculated [ 50 ] and is presented in Table 4, where P is the input power (kW), V is the volume of the solution (L) in the reactor, t is the irradiation time (min), C o is the initial concentration, and C is the final concentration of the pollutant.…”

Section: Resultsmentioning

confidence: 99%

“…The electrical energy consumption is the important contributor in the operating cost of the process. Therefore, the electrical energy per order EE=O ¼ PÃtÃ1000 V Ã60Ãlog Co C was calculated [50] and is presented in Table 4, where P is the input power (kW), V is the volume of the solution (L) in the reactor, t is the irradiation time (min), C o is the For bare LF and g-CN, EE/O was calculated as 2054 and 1704 kW Á h Á m À3 , respectively, which was higher than the LF/g-CN nanocomposites. The EE/O for 1% LFCN was calculated as 916 kW Á h Á m À3 , which was lowest among all the synthesized nanocomposites of LF/g-CN.…”

Section: Electrical Energy Consumptionmentioning

confidence: 99%

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Synthesis, characterization, and performance assessment of a perovskite‐type nano photocatalyst for degradation of thiamethoxam

Pandey,

Bansal,

Toor

2023

Can J Chem Eng

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It is essential to remove thiamethoxam (THMX) from surface water as it negatively impacts the ecology and neurological systems of insects. Hence, a study was conducted to degrade THMX with different compositions of LaFeO3/g‐C3N4 (LFCN) composites. Several methods, including X‐ray powder diffraction (XRD), ultraviolet–visible spectroscopy (UV–Vis), X‐ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), and field emission scanning electron microscopy (FESEM), were applied to characterize the synthesized photocatalyst. The influence of many parameters on degradation, for example, THMX concentration, dosage of catalyst, and pH were studied experimentally. The degradation was highest under both UV‐C and sunlight for the synthesized catalyst, 1% LaFeO3/g‐C3N4 (LFCN1), in comparison to graphitic carbon nitride (g‐CN), and bare lanthanum ferrite (LF). The degradation was around 95% for LFCN1 under UV‐C light having an intensity of 15 W/m2 whereas degradation was 71.8% with LFCN1 photocatalyst under sunlight at neutral pH in 120 min of reaction time. The increased activity of LFCN1 was attributable to an improved surface area and a lower band gap. The study of reaction kinetics indicated second‐order behaviour. Additionally, a probable mechanism for degradation was put forth.

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“…The electrical energy consumption is the important contributor in the operating cost of the process. Therefore, the electrical energy per order

EE / O = \frac{P * t * 1000}{V * 60 * \log \frac{C_{o}}{bold-italicC}}

Section: Resultsmentioning

confidence: 99%

Section: Electrical Energy Consumptionmentioning

confidence: 99%

Synthesis, characterization, and performance assessment of a perovskite‐type nano photocatalyst for degradation of thiamethoxam

Pandey,

Bansal,

Toor

2023

Can J Chem Eng

Self Cite

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“…However, when the catalyst dosag further elevated to 2 g/L, the degradation efficiency exhibited a decrease to 67.4% (Figu This observed enhancement in degradation with the initial increase in catalyst dosage 0.25 to 1 g/L, can be attributed to the greater available catalyst surface area. This incr surface area facilitated the enhanced absorption of photons, thus promoting the photoca process through the greater number of (e − , h + ) pairs, resulting in the generation of more radicals [42]. The reduction in the degradation rate beyond a catalyst dosage of 1 g/L c attributed to the increasing solution turbidity and the adverse effects associated surpassing the optimal photocatalyst dose.…”

Section: Effect Of Catalyst Dosagementioning

confidence: 99%

Green Fabrication of ZnO Nanoparticles and ZnO/rGO Nanocomposites from Algerian Date Syrup Extract: Synthesis, Characterization, and Augmented Photocatalytic Efficiency in Methylene Blue Degradation

Madi,

Chebli,

Ait Youcef

et al. 2024

Catalysts

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This innovative article provides a detailed description of the successful biosynthesis of zinc nanoparticles (ZnO-NPs) using an aqueous extract of Algerian Date Syrup, also known as molasses. A meticulous process was carried out to determine the optimal calcination temperature for ZnO-NPs, a crucial step in the preparation of these nanoparticles. The study was further extended by creating ZnO/rGOx nanocomposites through a hydrothermal method, varying the concentrations of reduced graphene oxide (rGO) at 5%, 10%, and 15%. The characteristics of the nanocomposites were thoroughly explored, encompassing chemical, optical, and morphological aspects, using sophisticated analysis techniques such as scanning electron microscopy (SEM), UV-visible diffuse reflectance spectroscopy (UV DRS), Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). These analyses provided an in-depth understanding of the structure and properties of the nanocomposites. The centerpiece of this study is the evaluation of the photocatalytic degradation capacity of ZnO-NPs and ZnO/rGOx nanocomposites. These materials have demonstrated their ability to act as cost-effective and environmentally friendly photocatalysts for wastewater treatment. Experiments on methylene blue degradation under UV irradiation were conducted, yielding impressive results: a degradation efficiency of 86.6% was achieved in 140 min using 1 g/L of ZnO-NPs, and this rate reached 100% with the ZnO/rGO catalyst in the same time frame, highlighting its superiority as a photocatalyst. Furthermore, this study examined the variables affecting the photocatalysis experiment, including the solution’s pH and the amount of catalyst. The results revealed that the ZnO/rGO photocatalyst reached its optimal efficiency under neutral pH conditions and at a concentration of 1 g/L, providing crucial information for practical use of these materials. This enriched article highlights the promising potential of ZnO-NPs and ZnO/rGOx nanocomposites as efficient photocatalysts for methylene blue degradation, paving the way for significant environmental applications in wastewater treatment.

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“…The amount of adsorbed MG per unit mass of MOF (qt) at any time (t) was calculated using equation (1).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…Among industrial sectors, textiles contribute 17-20% of industrial water pollution to the aquatic system [1]. The alarming release of hazardous chemicals into the environment is a pressing concern, particularly given the growing textile industry.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Cationic Dye Removal Efficiency through Factorial Design Analysis using ZIF-8 and Fe-BTC Metal-Organic Frameworks

Garg,

Sabouni,

Alaamer

et al. 2024

Proceedings of the 9th World Congress on Recent Advances in Nanotechnology

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In the present study, we examine the adsorption of the cationic dye Malachite Green (MG) onto two metal-organic frameworks: ZIF-8 and Fe-BTC. The preparation of beads was effectively carried out through the polymer coating process utilizing sodium alginate. To study the effect of different factors on adsorption capacity and removal %age of Malachite Green in a batch process, we employed a 2 3 factorial design study analysis. The investigation involved three primary factors, each with two levels: MOF type (A: Fe-BTC and ZIF-8), MOF bead dosage (B: 50 mg to 100 mg), and initial concentration (C: 5 mg/L to 17 mg/L). The primary effects of these variables and their interactions were examined using Response Surface Methodology (RSM), main effect, interaction effect, and Pareto chart. The factorial design analysis, conducted using analysis of variance (ANOVA), revealed that the most significant factor influencing adsorption capacity was the initial concentration of MG, followed by the dosage of MOF beads and the type of MOFs.

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Characterization and performance evaluation of synthesized ZnO nanoflowers, nanorods, and their hybrid nanocomposites with graphene oxide for degradation of Orange G

Cited by 24 publications

References 53 publications

Synthesis, characterization, and performance assessment of a perovskite‐type nano photocatalyst for degradation of thiamethoxam

Synthesis, characterization, and performance assessment of a perovskite‐type nano photocatalyst for degradation of thiamethoxam

Green Fabrication of ZnO Nanoparticles and ZnO/rGO Nanocomposites from Algerian Date Syrup Extract: Synthesis, Characterization, and Augmented Photocatalytic Efficiency in Methylene Blue Degradation

Enhancing Cationic Dye Removal Efficiency through Factorial Design Analysis using ZIF-8 and Fe-BTC Metal-Organic Frameworks

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