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Lanthanum hexaboride (LaB6) nanowires have attracted much attention due to their outstanding physical properties. In order to enhance the developments of LaB6 nanowires, it is essential to study the field emission (FE) properties of LaB6 nanowires in different environments. Here, we investigate the effect of oxygen (O2) on the FE behaviors of LaB6 nanowires. And it is found that the oxygen content...
The current study highlights the preparation of iron modified natural sericite composite beads and its application for arsenic and lead treatment from petroleum industry wastewater effluent. The natural sericite material was altered by iron-oxide and then the modified sericite with the whole iron-oxide particles was encapsulated for the preparation of spherical shaped beads using natural biopolymer...
In the automotive industry, the control of friction and wear by the lubricant in thermal engines and gear box is one of the most important issues for fuel economy. Therefore, it is needed to better understand the nature of tribochemical reactions with specific materials and competition of additives in the formulated lubricant in order to design and develop better lubricants that also address environmental...
Removal process for corrosive, noxious and offensive odorous hydrogen sulfide (H2S) is often needed in waste to energy conversion system based on biogas. A hydrated iron oxide based reactive adsorbent that called iron oxide impregnated coco coir (IOCC) has been prepared for supporting H2S removal from biogas. For establishing its optimized separation performance, a series of laboratory scale experiments...
A permeation theoretical model is proposed based on competitive adsorption for estimating the permeation effect on the stored vacuum electronic devices (VED) surrounded by mixture gases, in which the parameters are determined by experimental results. The life expectation that the pressure inside a stored VED rises to the critical value, induced by permeation, is also set up based on the model. As...
The objective of this work is to study the effect of interlayer cations on the mechanism of adsorption-desorption of water in the case of a montmorillonite exchanged by alkali metals. This is done through thermodynamic measurements, i.e. isotherms of adsorption and desorption of water. The raw material is subjected to purification treatment by using the sedimentation followed by cationic exchange...
This paper is concerned with the adsorption of Cr(III) by natural zeolite and polymeric Al/Fe (PAFC) modified one. The effects of the kind of zeolite, surging time, initial concentration of Cr(III), pH and ionic strength on the adsorption performance were investigated. Meanwhile, the adsorption capacities of zeolite were discussed. The results showed that the amount of saturated adsorption of PAFC...
This paper is study on the adsorption performance of chitosan for copper ions in conditions of different amounts of chitosan, different times, different temperatures and different pH. The results show that the best adsorption conditions is chitosan concentration of 6.4 ∼ 8.0g/L; adsorption time of 10min; adsorption temperature of 38°C; pH=6. The kinetic equation of chitosan adsorption for copper ion...
Fe-doped titania nanotubes were prepared by impregnation method to improve the adsorption properties of titania nanotubes. XRD and BET were used to characterize the crystalline phase and special surface area of titania nanotubes. The analysis results revealed that the crystalline phase of titania nanotubes was unchanged after doping the iron, and the characteristic peak of iron appeared when the concentration...
A novel mesoporous binary oxide with iron and cerium (MBOIC) was prepared and used as the adsorbent for the removal of arsenite from water solution. Effects of solution pH, adsorbent dosage and arsenite concentration on the adsorption efficiency have been investigated. The results showed that the adsorbent MBOIC had a high removal rate of arsenite in water solution at the pH range of 5∼9. The adsorption...
A kind of Fe - Al - La composite oxide microspheres coated with a delay water-soluble layer of CaO was prepared. It was used to treat wastewater containing high concentration of fluorine. When chemical precipitation, flocculation precipitation ended, the fluorine content in water was <;20 mg/L, the CaO layer of Fe - Al - La composite oxide microspheres is dissolved and Fe - Al - La oxide microspheres...
Based on the strong affinities of Fe(III) and Al(III) to fluoride, four iron- aluminum hydroxide complexes were synthesized as adsorbents for the fluoride removal. Moreover, the adsorption experiments showed that all iron-aluminum complexes could adsorb aqueous fluoride effectively and with a high capacity. When an fluoride solution of 10 mg/L−1 was added with anyone of these complexes at pH 5.0–9...
The influence of Fe in catalyst for low-temperature selective catalytic reduction of NO with NH3 was investigated via altering the loading of Fe. A series of catalysts were prepared by impregnation method. The results show that the loading of Fe could improve the catalytic performance of the catalyst at low temperature. The removal efficiency of NOx could exceed 95% at the range of 150~230°C with...
A series of CuO-CeO2 catalysts doped with transition metal oxides were prepared by co-precipitation method for selective CO oxidation and the effects of the additives on the catalytic performance were examined by H2-TPR, in-situ DRIFTS techniques. The results showed that the main CO adsorption site on CuO-CeO2 series catalysts was Cu+ species. The catalytic activity at lower temperatures was related...
Adsorption properties of Fe(II) and Mn(II) by palygorskite were investigated using a batch adsorption, and the effects of contact time, roasting temperature and acid concentration for activation on adsorption removal of Fe(II) and Mn(II) were studied. Results showed that the adsorption sites of palygorskite were well exposed to both kinds of metal ions, and the equilibrium adsorption was reached within...
A new method for Nitrate-N removal in water has been presented in this paper, and related experiments have been carried out to study its technical characteristics. Results showed that in designed electrolysis system, Fe modified Ti substrate cathode can catalytic reduce NO3--N to NH4+-N under suitable conditions. Furthermore NH4+-N can be oxidized to N2-N in same system by supporting of Cl-. Under...
Sensing applications in the petroleum industry pose unique challenges due to high viscosity and high refractive index of hydrocarbon fluids, which render many fluid-based techniques impractical. Real-time observation of adsorption, desorption, and competitive adsorption processes of long chain functionalized hydrocarbons onto activated cantilevers in static mode are shown. In addition, microcantilevers...
The electrochemical deposition behaviors of Pd-Ni bimetal on different matrix materials were studied by means of the preparation of Pd-Ni/GC, Pd-Ni/foam-Ni and Pd-Ni/Ti electrodes. The effect of the matrix materials to the electrocatalytic activity of electrodes was investigated. CV results reveal that hydrogen absorbability of Pd-Ni/Ti electrode was obviously higher than the Pd-Ni/GC and Pd-Ni/foam-Ni...
Studying on the eluting and adsorpting the saturated ANJ.SiC by different regenerants, NaOH is the most suitable one. The influence of the factors containing NaOH concentration, elution time and regeneration times on ANJ.SiC regeneration rate was studied. The results show that the best NaOH concentration is 0.5mol/L, with the regeneration rate of 115.83%; the best elution time is 60min, with the regeneration...
In this paper, the complex of Fe4 cluster and single walled carbon nanotubes (SWCNTs) as a model system of metal cluster-SWCNT complexes is presented. Structural and mechanical properties of the Fe4 cluster adsorbing inside and outside SWCNTs with various chiralities are investigated by first-principles calculations.
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