Synthesis and Characterization of Green Polyurethane/Nanosilica Composite: Study of Thermomechanical, Surface Topography and Physicochemical Properties

Cobalt and iron are common catalysts used in the Fischer-Tropsch (FT) reaction. This paper presents the synthesis and characterization of monometallic and bimetallic cobalt and iron nanoparticles supported on carbon nanotubes (CNTs). The CNTs-supported nanocatalysts were synthesized by a wet impregnation method at various ratios of Fe:Co. The physicochemical properties of the samples were analyzed by H2-temperature programmed reduction (TPR), CO and H2-chemisorption analyses, transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The effects of incorporation of Fe into Co on the physicochemical properties of Co/CNTs in terms of degree of reduction, CO and H2 chemisorptions and morphologies were investigated. TEM showed that metal nanoparticles were well dispersed on the external surface and inside the CNTs. For monometallic Co/CNTs and Fe/CNTs, the average metal particle size was 5±1 nm and 6±1 nm, respectively. For the bimetallic 70Co30Fe/CNTs nanocatalysts, the average particle size was found to be 4±1 nm. Metal particles attached to the outer walls were bigger than the ones inside the CNTs. H2-TPR analysis of Co/CNTs indicated two temperature regions at 330°C (low temperature) and 491°C (high temperature). The incorporation of iron into cobalt nanocatalysts of up to 30 % of the total metal loading enhanced the catalyst’s H2 and CO chemisorptions capacities and reducibility.

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Synthesis and characterization of biobased poly(butylene succinate- ran -butylene adipate). Analysis of the composition-dependent physicochemical properties

European Polymer Journal ◽

10.1016/j.eurpolymj.2016.12.012 ◽

2017 ◽

Vol 87 ◽

pp. 84-98 ◽

Cited By ~ 18

Author(s):

Thibaud Debuissy ◽

Eric Pollet ◽

Luc Avérous

Keyword(s):

Physicochemical Properties ◽

Synthesis And Characterization ◽

Butylene Succinate

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Synthesis and Characterization of Novel Fe-Mn-Ce Ternary Oxide–Biochar Composites as Highly Efficient Adsorbents for As(III) Removal from Aqueous Solutions

Materials ◽

10.3390/ma11122445 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2445 ◽

Cited By ~ 6

Author(s):

Xuewei Liu ◽

Guogang Zhang ◽

Lina Lin ◽

Zulqarnain Khan ◽

Weiwen Qiu ◽

...

Keyword(s):

Ionic Strength ◽

Physicochemical Properties ◽

Adsorption Capacity ◽

Synthesis And Characterization ◽

Ternary Oxide ◽

Contaminated Water ◽

Surface Functional Groups ◽

Pseudo Second Order ◽

Ce Content

The widespread pollution of water bodies with arsenic (As) necessitates the development of efficient decontamination techniques. To address this issue, we herein prepare Fe-Mn-Ce ternary oxide-biochar composites (FMCBCs) using impregnation/sintering methods and examined their physicochemical properties, morphologies, and As(III) removal performances. The specific surface area of FMCBCs increased with increasing Ce content and enhanced the quantity of surface functional groups (–OH, –COOH). The adsorption of As(III) on FMCBCs was well represented by pseudo-second-order kinetics, and the As(III) adsorption capacity of the best-performing FMCBCs (8.47 mg g−1 for FMCBC3) exceeded that of BC by a factor of 2.9. At pH = 3, the amount of adsorption of As(III) by FMCBCs reached a maximum, and the increased ionic strength could enhance adsorption capacity of FMCBCs. Moreover, an As(III) removal efficiency of ~99% was observed for FMCBC3 at a dosage of 8 g L−1, which highlighted its great potential as an absorbent for As(III) removal from contaminated water.

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