High-entropy oxide (CeGdHfPrZr)O2 nanoparticles as reusable photocatalyst for wastewater remediation

Surfaces and Interfaces, Год журнала: 2024, Номер 51, С. 104815 - 104815

Опубликована: Июль 17, 2024

Язык: Английский

---

Application of modified pumice particles with a metal-organic composite prepared by m-phenylenediamine an Iron (II) for photoreduction of Cr(VI) under visible light

Environmental Technology & Innovation, Год журнала: 2024, Номер 36, С. 103752 - 103752

Опубликована: Июль 16, 2024

Discharging heavy metals into water bodies results in global environmental risks. Hexavalent chromium (Cr(VI)) is known as a harmful substance that poses substantial health hazards to humans. This study aimed modify the pumice beads using metal-organic composite synthesized by m-Phenylenediamine (mPD) and Iron (II) (FeCl2·4H2O) via solvent-free method for photoreduction of Cr(VI) Cr(III) wastewater. In proposed method, iron ions serve both an electron generator linker polymerization mPD on surface high-temperature pyrolysis process. The optimum molar ratio FeCl2·4H2O/mPD temperature were determined be 1 700 °C. Moreover, operative parameters such pH, hole scavenger (formic acid) dosage, photocatalyst mass, initial concentration, reaction time studied condition was obtained pH 2.0, dosage 20 mL L−1, mass 2 g, concentration 100 mg L−1 13 min irradiation time. ability reduce at 50 under natural sunlight also examined reduction efficacy % achieved conditions within 40 60 min; respectively. Finally, reusability test conducted up 10 cycles, proved durability practicality prepared photocatalyst. easy separation, short time, functioning exhibited promising application reduction.

Язык: Английский

---

Research progress on high entropy oxide ceramics: principles, preparation, and properties

Journal of Materials Research and Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

---

Band-Gap Engineering of High-Entropy Fluorite Metal Oxide Nanoparticles Facilitated by Pr3+ Incorporation by Gel Combustion Synthesis

Gels, Год журнала: 2025, Номер 11(2), С. 117 - 117

Опубликована: Фев. 6, 2025

Tailoring the bandgap of a material is necessary for improving its optical properties. Here, high-entropy oxide Ce0.2Gd0.2Sm0.2Y0.2Zr0.2O2-δ (HEO) nanoparticles was modified using Pr3+. Various concentrations Pr3+ (x = 0, 0.01, 0.02, 0.05, 0.075, 0.1, 0.15) were incorporated into host gel combustion synthesis. After step, powders heat-treated at various temperatures (650 °C, 800 950 °C) 2 h. The obtained Pr3+-incorporated HEO characterized X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV–visible spectroscopy. results indicate that, when samples are calcined single-phase cubic fluorite structure without any phase separation or impurity. absorbance red-shifts to higher wavelengths concentration increased. This reduces from 3.15 eV 1.87 x 0 (HEO-0) 0.15 (HEO-6), respectively. HEOs can be suitable candidates photocatalytic applications due their in visible region.

Язык: Английский

---

Recent Advances in High-Entropy Oxides for Photocatalytic Applications

ACS Materials Letters, Год журнала: 2025, Номер unknown, С. 1042 - 1056

Опубликована: Фев. 17, 2025

Язык: Английский

---

Enhanced synthesis of plasmonic mesoporous Ag-doped ZnAl2O4 nanophotocatalyst via synergistic ultrasound and microwave irradiation for efficient organic dye degradation

Advanced Powder Technology, Год журнала: 2025, Номер 36(5), С. 104855 - 104855

Опубликована: Март 22, 2025

Язык: Английский

---

Surface Modifying ZnWO4 with Zn QDs and Oxygen Vacancies for Enhanced Photocatalytic Cr(VI) Reduction

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2025, Номер unknown, С. 137420 - 137420

Опубликована: Июнь 1, 2025

Язык: Английский

---

Electrochemical investigation of synthesized (Mg0.21Cr0.21Mn0.21Fe0.21Cu0.16)3O4 high entropy oxide for supercapacitor electrode material

Ceramics International, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

---

Synthesis and functional properties of (Al0.2Co0.2Fe0.2Ni0.2Ti0.2)3O4 high entropy spinel oxide

Journal of Physics and Chemistry of Solids, Год журнала: 2024, Номер 194, С. 112249 - 112249

Опубликована: Авг. 6, 2024

Язык: Английский

---

Effect of precursor concentration on the growth of magnesium oxide nanomaterials by direct heating method

Discover Catalysis., Год журнала: 2024, Номер 1(1)

Опубликована: Авг. 16, 2024

Various methods have been developed for the preparation of MgO nanomaterials. However, they often suffer from limitations such as high cost, lengthy synthesis times, and excessive power consumption. In response, a direct heating (DH) method has to address these challenges, enabling rapid (< 10 min) cost-effective production this study, DH process was optimized by investigating influence precursor solution concentrations (0.01 M 0.10 M) on growth nanomaterials wire surfaces. Analyses utilizing Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray (EDX), Photoelectron (XPS) confirmed formation MgO. Field Emission Scanning Electron Microscopy (FESEM) revealed that predominantly nano-walls particles. The conditions requires Mg(NO3)2·6H2O at 50 W.h. min. Under specific condition, favourable surface coverage 81.54% achieved where nanowalls produced demonstrated promising capability remove Methylene Blue (MB) dye under UV irradiation. conclusion, technique is alternative route synthesize nanomaterial in simple, cost-and -time efficient environmentally friendly way.

Язык: Английский

---