Three different methods for ZnO-RGO nanocomposite synthesis and its adsorption capacity for methylene blue dye removal in a comparative study

BMC Chemistry, Journal Year: 2025, Volume and Issue: 19(1)

Published: Jan. 18, 2025

Water is one of the vital needs life. However, due to rapid industrialization, urbanization and lack awareness, world population now facing threat water shortage. To ensure that future living conditions are preserved, it crucial reduce pollution protect ecosystem. Zinc oxide- reduced graphene oxide (ZnO-RGO) nanocomposite used in this study as an adsorbent for adsorption methylene blue (MB) dye from aqueous solution. An easy strategy was synthesis nanoparticles (RGO), (ZnO) ZnO-RGO nanocomposite. The (RGO) accomplished through exothermic reaction a modified Hummer's method. In novel approach, zinc (ZnO NPs) were synthesized using green Leidenfrost technique. This presents comparative investigation employing both chemical methods. Three distinct approaches utilized prepare nanocomposite: (1) innovative method composite A1, (2) precipitation A2, (3) physical mixing sonication A3. research marks first application technique nanocomposites, contributing growing body knowledge field. X-ray diffraction (XRD), Burnauer-Emmett-Teller (BET), Fourier transform infrared (FTIR), Zeta potential, transmittance electron microscope (TEM) scanning (SEM) analyses conducted sample characterization. Comparing XRD patterns three methods, notable intensity peaks A3 highest when ZnO method, indicating higher degree crystallinity. FTIR analysis approves combining with RGO affects functional groups surfaces. SEM shows NPs sheets incorporated together. case A1 sharp angles make flower shape observed unique synthesizing surface area A2 (7.29 m2/g) compared (2.91 A3(1.90 m2/g). A comparison made among nanocomposites MB removal. effect dose, pH, contact time initial concentration on has been studied. results show removed 85.5 87.5% at optimum dose 0.15 g/100 ml pH8 95% 0.1 pH 2. All composites exhibited adherence Langmuir isotherm model, correlation coefficients (R2) 0.9858, 0.9904, 0.9959 A3, respectively. Kinetic demonstrated pseudo-second-order model best described process all composites, yielding R2 values 0.9998, 0.9988, 1.0000 capacity (104.5 mg/g) other (87.7 97.5 mg/g respectively). Desorption experiments revealed removal percentages varied ratio ethanol-water mixture used. Absolute ethanol achieved 90% 1:1 1:2 solutions (87.5% 80%,

Language: Английский

---

Synthesis and characterization of magnetic chitosan microspheres as coking wastewater adsorbents

Desalination and Water Treatment, Journal Year: 2025, Volume and Issue: unknown, P. 101020 - 101020

Published: Jan. 1, 2025

Language: Английский

---

A N, S-Containing Graphene Oxide Composite for the Adsorptive Removal of p-Nitrophenol from Aqueous Solutions

Molecules, Journal Year: 2025, Volume and Issue: 30(9), P. 2046 - 2046

Published: May 4, 2025

A novel 3-amino-5-mercapto-1,2,4-triazole functionalized graphene oxide composite (GO-ATT) was successfully prepared via a covalent coupling method, then employed for the removal of p-nitrophenol (PNP) from wastewater. The morphology as well composition GO-ATT were investigated using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and photoelectron (XPS). surface charge evaluated by Zeta potential analyses. area pore size distribution analyzed specific analyses Brunauer–Emmett–Teller (BET) method. Batch adsorption experiments performed to investigate effects conditional factors, including contact time, solution pH, initial PNP concentration, temperature, on process. maximum capacity (0.287 mmol g−1) could be obtained at 25 °C. Freundlich isotherm (R2 > 0.92505) can better describe behavior composite. thermodynamic functions (ΔG°, ΔH°, ΔS°) indicate that is spontaneous, endothermic, entropy-increasing process features physisorption. conformed nonlinear pseudo-second-order kinetic model. Adsorption mechanism investigation indicated electrostatic, π-π stacking, hydrogen bonding interactions involved in After 10 adsorption–desorption cycles, adsorbent exhibited stable efficient rate (94%) PNP. Due its advantages high efficiency, excellent reusability, stability, covalently coupled might used an effective phenolic contaminants

Language: Английский

---

Absorbent polymer gels: A review on fundamental mechanisms, preparation strategies, and applications

European Polymer Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113795 - 113795

Published: Feb. 1, 2025

Language: Английский

---

Rapid removal of 2,4-DCP by activated carbon loaded nano-zero valence iron immobilized microorganisms

International Biodeterioration & Biodegradation, Journal Year: 2025, Volume and Issue: 201, P. 106071 - 106071

Published: March 22, 2025

Language: Английский

---

Removal of bisphenol A via adsorption on graphene/(reduced) graphene oxide-based nanomaterials

Separation and Purification Reviews, Journal Year: 2023, Volume and Issue: 53(3), P. 231 - 249

Published: Aug. 1, 2023

ABSTRACTRecently, emerging nanoadsorbents, such as graphene/(reduced) graphene oxide (GO)-based nanomaterials, have been prepared and used in different environmental applications, particularly water purification. This study is a review of the research progress on adsorption mechanisms for bisphenol A removal, which significantly influenced by physicochemical properties various GO-based nanomaterials quality conditions. In addition, this presents beneficial knowledge application these Results removal several other comparable contaminants using nanoadsorbents suggest that their can vary depending compounds or adsorbents chemistry Therefore, performance discussed: (i) to evaluate overall capacities based contaminants; (ii) summarize influences main factors, pH, temperature, background ions/alkalinity, natural organic matter organics, adsorption; (iii) discuss key affect nanomaterials; (iv) describe possible desorption reusability carbon-based nanomaterials.KEYWORDS: Adsorptionbisphenol Agraphene oxidenanomaterials AcknowledgmentsThis work was supported National Research Foundation Korea (NRF) grant funded government (MSIT) (No. RS-2023-00217228).Disclosure statementNo potential conflict interest reported author(s).

Language: Английский

---

Facile synthesis of novel Z-scheme GO-modified ternary composite as photocatalyst for enhanced degradation of bisphenol-A under sunlight

Journal of the Taiwan Institute of Chemical Engineers, Journal Year: 2023, Volume and Issue: 147, P. 104914 - 104914

Published: May 16, 2023

Language: Английский

---

Polyethylene glycol crosslinked modified chitosan/halloysite nanotube composite aerogel microspheres for efficient adsorption of melanoidin

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 266, P. 131013 - 131013

Published: March 23, 2024

Language: Английский

---

Synthesis of graphene oxide-modified porous chitosan cross-linked polyaniline composite for static and dynamic removal of Cr(VI)

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 30(9), P. 22992 - 23011

Published: Oct. 29, 2022

Language: Английский

---

Potential of waste glass to adsorb graphene oxide from aqueous solutions: Mechanisms and behavior

Ceramics International, Journal Year: 2024, Volume and Issue: 50(13), P. 24326 - 24338

Published: April 18, 2024

Language: Английский

---