Advertisement

Topics

Highly effective bromate reduction by liquid phase catalytic hydrogenation over Pd catalysts supported on core-shell structured magnetites: Impact of shell properties.

07:00 EST 31st January 2019 | BioPortfolio

Summary of "Highly effective bromate reduction by liquid phase catalytic hydrogenation over Pd catalysts supported on core-shell structured magnetites: Impact of shell properties."

Liquid phase catalytic reduction of bromate with supported noble metals as the catalysts is a promising method to remove bromate in water. Magnetic supports provide a feasible way to recover catalysts whose surface properties also strongly influence the catalytic efficiency. In this study, Pd nanoparticles supported on core-shell structured magnetites with varied shells (e.g., carbon, SiO, polypyrrole, polyaniline, polydopamine and chitosan) were prepared and catalytic reduction of bromate on the catalysts was investigated. The results showed that in comparison with other catalysts Pd/(FeO@polyaniline) exhibited a higher catalytic efficiency due to its higher point of zero charge and surface hydrophilicity. In parallel, bromate reduction on Pd/(FeO@polyaniline) followed the Langmuir-Hinshelwood model, confirming the crucial role of bromate adsorption. At pH 5.6 and a catalyst dosage of 0.05 g/L, 0.4 mM bromate could be completely reduced into bromide within 120 min. Furthermore, the magnetic catalysts could be effectively separated and recovered under an external magnetic field within 3 min. The results of catalyst reuse showed that after five consecutive catalytic reduction cycles Pd/(FeO@polyaniline) retained 87% of its fresh catalyst activity. The present findings indicate that Pd/(FeO@polyaniline) with polyaniline as the shell is a highly active, stable and recyclable catalyst for liquid phase catalytic hydrogenation of pollutants in water.

Affiliation

Journal Details

This article was published in the following journal.

Name: The Science of the total environment
ISSN: 1879-1026
Pages: 673-685

Links

DeepDyve research library

PubMed Articles [23375 Associated PubMed Articles listed on BioPortfolio]

Liquid phase catalytic hydrogenation reduction of Cr(VI) using highly stable and active Pd/CNT catalysts coated by N-doped carbon.

Liquid catalytic hydrogenation is a green and cost-effective technique for the reductive removal of pollutants in water. Supported noble metals are the most frequently used catalysts in liquid phase c...

Ultra-small MoN on SBA-15 as a highly efficient promoter of low-loading Pd for catalytic hydrogenation.

Decreasing Pd usage whilst maintaining a superior performance is promising, but remains a challenge in the catalytic field. Herein, we have demonstrated the highly efficient promotion of Mo2N with a r...

Au-Pd bimetallic nanoparticles embedded highly porous Fenugreek polysaccharide based micro networks for catalytic applications.

Currently, metallic nanoparticles possessing versatile heterogeneous catalytic functionality such as in hydrogenation, water splitting, hydrogen production and CO reduction for global pollution remedi...

Strategies to enhance the stability of nanoscale zero-valent iron (NZVI) in continuous BrO reduction.

The reduction of bromate to bromide was successfully achieved by bimetallic catalysts with NZVI support in continuous-flow reactors. The stability of NZVI-supported bimetallic catalysts was enhanced b...

Facile construction of reduced graphene oxide supported three-dimensional polyaniline/WO nanobelt-flower as a full solar spectrum light response catalyst for efficient photocatalytic conversion of bromate.

As a carcinogenic byproduct in drinking water treatment, bromate has raised global concerns on environmental and health hazard, calling for effective treatments. In the current work, a novel reduced g...

Clinical Trials [9079 Associated Clinical Trials listed on BioPortfolio]

Cryogenic Preservation of Spermatozoa

The reference technique for the conservation of gametes is storage in liquid nitrogen but new vats of nitrogen vapor (storage over liquid nitrogen) or in dry phase (storage in an insulated...

Dried Fruit and Postprandial Glycemia Trial

Dried fruits show promising potential for the management of blood glucose. Previous trials have reported beneficial effects of raisins on post-prandial glucose and insulin responses in hea...

Melatonin for Sleep in Children With Autism

The purpose of this study is to determine if liquid supplemental melatonin is an effective treatment for children with autism who have sleep problems related to insomnia (difficulty fallin...

A Trial Examining the Treatment of Common Warts With Combination Liquid Nitrogen (LN2) and Cantharidin

The purpose of the study was to see if liquid nitrogen, a commonly used treatment for warts, is more effective if it is used alone, or if it is more effective if combined with cantharidin,...

To Evaluate the Convenience, Safety and Efficacy of Follitropin Alfa Liquid Pen Compared With Follitropin Beta Liquid Pen

This was a prospective, randomised, open comparative monocentric phase IIIb study to evaluate the convenience, safety and efficacy of follitropin alfa (Gonal-f) liquid pen compared with fo...

Medical and Biotech [MESH] Definitions

Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix.

Miniaturized methods of liquid-liquid extraction.

Chromatographic techniques in which the mobile phase is a liquid.

Colloids with a solid continuous phase and liquid as the dispersed phase; gels may be unstable when, due to temperature or other cause, the solid phase liquefies; the resulting colloid is called a sol.

An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHROMATOGRAPHY and other analytical methods.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article