Our previous work applied a novel supported iron oxyhydroxide (FeOOH) catalyst to effectively treat benzoic acid by hydrogen peroxide. The FeOOH catalyst was prepared via the oxidation of Fe2+ by H2O2 in the acidic condition using a fluidized-bed crystallization reactor. The major components coated on the surface were identified as amorphous FeOOH and gamma-FeOOH. In terms of the crystallization conditions of FeOOH, some parameters including the operational pH, superficial velocity, specific iron loading, and influent H2O2 concentration were investigated to quantify their effects on the crystallization efficiency. All these parameters were found to significantly influence the crystallization efficiency. Two types of FeOOH catalysts were synthesized: FeOOH I was prepared at pH 3.5, and FeOOH II was formed by aging FeOOH I at pH 13. The percentages of surface amorphous FeOOH reduced from 70% to 30% after aging. The FeOOH II catalyst presented a higher reactivity toward H2O2 but lower stoichiometric efficiency in oxidizing benzoic acid than FeOOH I, similar to the result of the commercial goethite. Therefore, it is concluded that the crystalline property significantly affects the performance of catalytic oxidation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2003.09.034 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Water Oxidation in the Presence of Iron-Doped Copper (Hydr)Oxide.
Inorg Chem
December 2024
Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran.
This study explores the influence of Fe ion incorporation on the oxygen-evolution reaction (OER) in alkaline media, utilizing CuO-based materials. Instead of developing an efficient and stable OER catalyst, this research investigates two distinct CuO variants: one with Fe ions adhered to the surface and another with Fe ions integrated into the CuO lattice. By employing a variety of analytical techniques, the study demonstrates that the CuO variant with surface-bound Fe ions (referred to as compound 1) exhibits significantly enhanced OER performance compared to the variant with internally embedded Fe ions (referred to as compound 2).
View Article and Find Full Text PDFSemi-coherent Interface and Vacancy Engineering for Constructing NiTe/FeTe/FeO/FF to Boost Electrochemical Overall Water Splitting.
Small
December 2024
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830017, China.
Transition metal-based tellurides (TMTs) with excellent electrical conductivity are expected to be ideal electrocatalysts for overall water splitting. However, compared to transition metal sulfides and selenides, the reported applications of TMTs in overall water splitting are fewer. Herein, the NiTe/FeTe/FeO/FF carnation flower-like with a semi-coherent interface is successfully constructed to enhance the electrochemical overall water splitting performance.
View Article and Find Full Text PDFIntroducing different long-chain flexible ligands to regulate the transformation behavior of NiFe-MOF and as bifunctional catalysts for the HER/OER.
J Colloid Interface Sci
November 2024
Department of Chemical Engineering and Technology, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China. Electronic address:
The investigation of highly efficient metal-organic framework (MOF) electrocatalysts represents a pivotal challenge in enhancing the overall efficiency of water electrolysis. In this study, we present a co-liganding method based on molecular regulation, in which succinic (s.a), adipic (a.
View Article and Find Full Text PDFEnhanced peroxymonosulfate activation for organic decontamination by Ni-doped δ-FeOOH under visible-light assistance.
Environ Res
January 2025
Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, PR China. Electronic address:
There is an urgent need for efficient and cost-effective methods without secondary pollution to decompose pollutants from contaminated water in the face of severe water pollution caused by the extensive use of synthetic dye in industry. In this work, Ni-doped δ-FeOOH was synthesized using co-precipitation method at room temperature and was applied as the catalyst in a visible-light-assisted peroxymonosulfate system for assessing its catalytic performance in RhB removal. An optimum RhB degradation of 99.
View Article and Find Full Text PDFConstructing self-standing FeO-Pt/NF nanoflowers with synergistic active sites for efficient electrocatalytic overall (sea) water splitting.
Nanoscale
December 2024
College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing 210037, China.
Designing cost-effective and highly stable heterostructures with synergistic active sites could simultaneously catalyze the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) for (sea) water splitting. However, there are still challenges in maintaining the catalytic performance of individual materials and in constructing intimate interfaces. Herein, a novel corrosion engineering method is provided to prepare self-standing FeO-Pt/NF nanoflowers where ultra-small amounts of Pt combined with FeO are grown on nickel foam (NF) in the corrosion system of "HPtCl-NaCl-FeCl".
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!