Enhanced sulfamethoxazole ozonation by noble metal-free catalysis based on magnetic Fe3O4 nanoparticles: catalytic performance and degradation mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 19265-19270 ◽  
Author(s):  
Renli Yin ◽  
Wanqian Guo ◽  
Xianjiao Zhou ◽  
Heshan Zheng ◽  
Juanshan Du ◽  
...  
Keyword(s):  
Noble Metal ◽  
Fe3o4 Nanoparticles ◽  
Degradation Mechanism ◽  
Low Cost ◽  
Catalytic Performance ◽  
Metal Free ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4

In this research, Fe3O4 nanoparticles were prepared by a low-cost route free of other agents, and applied in the catalysis of sulfamethoxazole (SMX) ozonation.

Synthesis and Aqueous Dispersion of Monodisperse Magnetic Fe3O4 Nanoparticles

2013 ◽  
Vol 668 ◽  
pp. 335-337
Author(s):  
Wan Ju Zhang ◽  
Fang Wang
Keyword(s):  
Thermal Decomposition ◽  
Iron Oxide ◽  
Low Temperature ◽  
Fe3o4 Nanoparticles ◽  
Large Scale ◽  
Low Cost ◽  
Aqueous Dispersion ◽  
Amphiphilic Copolymer ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4

Iron oxide (Fe3O4) nanoparticles as one of the most important nanomaterials are suitable for many applications. Monodisperse magnetic Fe3O4 nanoparticles were synthesized by the thermal decomposition of the iron oleate precursor in octadecene (ODE). The iron oleate complex was prepared by reaction between sodium oleic and FeCl3·6H2O at low temperature. The Fe3O4 nanoparticles were transferred from organic solvent into water by amphiphilic copolymer. The aqueous dispersion of Fe3O4 nanoparticles was stable in water and physiological buffers. This method with low cost can be used to prepare large scale of aqueous dispersion of Fe3O4 nanoparticles.

scholarly journals Noble Metal-Free Hierarchical ZrY Zeolite Efficient for Hydrogenation of Biomass-Derived Levulinic Acid

2021 ◽  
Vol 9 ◽  
Author(s):  
Di Hu ◽  
Hong Xu ◽  
Zuotong Wu ◽  
Man Zhang ◽  
Zhiyue Zhao ◽  
...  
Keyword(s):  
Noble Metal ◽  
Levulinic Acid ◽  
Low Cost ◽  
Direct Synthesis ◽  
Catalytic Performance ◽  
Metal Free ◽  
Platform Chemicals ◽  
Synthetic Strategy ◽  
Metal Support Interaction ◽  
The Difference

Developing a low-cost and robust catalyst for efficient transformation of biomass-derived platform chemicals plays a crucial role in the synthesis of future transportation fuels. Herein, a post-synthetic strategy was employed to develop a noble metal-free and robust ZrY zeolite catalyst, which is efficient for the hydrogenation of biomass-derived levulinic acid (LA) into biofuel γ-valerolactone (GVL), whereas over 95% yield of GVL was achieved in 10 h at 220°C. The effects of acidic properties from ZrY catalysts and various reaction parameters on the catalytic performance were then discussed in detail. Subsequently, different characterization tools were used to compare the difference and relationship of structure activity between the fresh and spent ZrY catalysts. It was found that acidity and the metal–support interaction were important for the direct synthesis of GVL. This work provides a guideline to design a noble metal-free catalyst for high-value utilization of biomass-derived sources.

scholarly journals Converting copper sulfide to copper with surface sulfur for electrocatalytic alkyne semi-hydrogenation with water

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yongmeng Wu ◽  
Cuibo Liu ◽  
Changhong Wang ◽  
Yifu Yu ◽  
Yanmei Shi ◽  
...  
Keyword(s):  
Binding Energy ◽  
Noble Metal ◽  
Atomic Hydrogen ◽  
Copper Sulfide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Metal Free ◽  
Copper Nanowire

AbstractElectrocatalytic alkyne semi-hydrogenation to alkenes with water as the hydrogen source using a low-cost noble-metal-free catalyst is highly desirable but challenging because of their over-hydrogenation to undesired alkanes. Here, we propose that an ideal catalyst should have the appropriate binding energy with active atomic hydrogen (H*) from water electrolysis and a weaker adsorption with an alkene, thus promoting alkyne semi-hydrogenation and avoiding over-hydrogenation. So, surface sulfur-doped and -adsorbed low-coordinated copper nanowire sponges are designedly synthesized via in situ electroreduction of copper sulfide and enable electrocatalytic alkyne semi-hydrogenation with over 99% selectivity using water as the hydrogen source, outperforming a copper counterpart without surface sulfur. Sulfur anion-hydrated cation (S2−-K+(H2O)n) networks between the surface adsorbed S2− and K+ in the KOH electrolyte boost the production of active H* from water electrolysis. And the trace doping of sulfur weakens the alkene adsorption, avoiding over-hydrogenation. Our catalyst also shows wide substrate scopes, up to 99% alkenes selectivity, good reducible groups compatibility, and easily synthesized deuterated alkenes, highlighting the promising potential of this method.

Design of SiO2/aminopropylsilane-modified magnetic Fe3O4 nanoparticles for doxorubicin immobilization

2021 ◽  
Vol 70 (5) ◽  
pp. 987-994
Author(s):  
A. M. Demin ◽  
A. V. Vakhrushev ◽  
M. S. Valova ◽  
A. S. Minin ◽  
D. K. Kuznetsov ◽  
...  
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4

Preparation and Properties of Fe3O4/PMMA Nanocomposite Films

2009 ◽  
Vol 79-82 ◽  
pp. 505-508
Author(s):  
Li Li ◽  
H. Zhao ◽  
Wei Wang ◽  
F.F. Nie
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Chemical Structure ◽  
Silane Coupling Agent ◽  
Blood Compatibility ◽  
Nanocomposite Films ◽  
Precipitation Process ◽  
Silane Coupling ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Co Precipitation ◽  
Magnetic Fe3o4

The magnetic Fe3O4 nanoparticles had been synthesized by co-precipitation process and surface treatment by silane coupling agent (KH570). The magnetic Fe3O4/PMMA nanocomposite films were prepared by blend method, and the chemical structure, mechanical properties, surface morphology and the biocompatibility of the nanocomposite films were studied in this work. The magnetic Fe3O4 nanoparticles were well dispersed in the Fe3O4/PMMA nanocomposite films. The strength of the nanocomposite films, as well as the strain, decreased first and then increased with the increasing of the nanoparticles. The hemolytic ratio indicated that the nanocomposite films had a better blood compatibility.

Use of Magnetic Fe3O4 Nanoparticles Coated with Bovine Serum Albumin for the Separation OF Lysozyme from Chicken Egg white

2021 ◽  
pp. 129442
Author(s):  
Mariane Gonçalves Santos ◽  
Diailison Teixeira de Carvalho ◽  
Lucas Belga Caminitti ◽  
Bruna Bueno Alves de Lima ◽  
Marcello Henrique da Silva Cavalcanti ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Fe3o4 Nanoparticles ◽  
Bovine Serum ◽  
Egg White ◽  
Chicken Egg ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4

Magnetic Fe3O4 nanoparticles coated by natural rubber latex as MRI contrast agent

2019 ◽  
Vol 475 ◽  
pp. 458-464 ◽  
Author(s):  
Soudabeh Arsalani ◽  
Eder J. Guidelli ◽  
Matheus A. Silveira ◽  
Carlos E.G. Salmon ◽  
Jefferson F.D.F. Araujo ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Natural Rubber ◽  
Fe3o4 Nanoparticles ◽  
Natural Rubber Latex ◽  
Mri Contrast Agent ◽  
Rubber Latex ◽  
Mri Contrast ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4
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