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A simple thermodynamic model for the doping and alloying of nanoparticles

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تومان
Impurity incorporation into nanoparticles is modeled using thermodynamics. For small particles, entropically driven impurity incorporation is reduced, rendering doping difficult. We show that the free energy of surface impurities in small nanoparticles is lower than core impurities, surface doping therefore...

Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions – A review

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Heavy metal remediation of aqueous streams is of special concern due to recalcitrant and persistency of heavy metals in environment. Conventional treatment technologies for the removal of these toxic heavy metals are not economical and further generate huge quantity of...

Antimicrobial Properties of Socks Protected with Silver Nanoparticles

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Antimicrobial properties of socks containing silver nanoparticles were investigated. Two types of socks were used for testing. The first were linen (100%) socks impregnated with a specimen containing silver nanoparticles. The second type were commercially available cotton (55%) socks containing...

Application of magnetic iron oxide nanoparticles in catalysts as catalyst base

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When synthesizing magnetic nanoparticles, some key conditions such as inherent magnetic properties, size and shape of nanoparticles, surface coatings and surface charge of nanoparticles, stability in aqueous  medium and their non-toxicity should be considered. By choosing a suitable synthesis method,...

Assessment of Nucleation Kinetic Mechanisms in Gas Hydrate Crystallization Processes

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Nucleation is one of the most important steps in the process of crystallization of gas hydrates. In the present work the nucleation mechanism  of gas hydrate formation process using the propane as a sII gas hydrate former is investigated at...

Batch Emulsion Polymerization of Vinyl Chloride: Application of Experimental Design to Investigate the Effects of Operating Variables on Particle Size and Particle Size Distribution

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In this article, the influences of operating variables on the particle size (PS) and particle size distribution (PSD) of emulsion poly(vinyl chloride) in batch reactor were investigated using Taguchi experimental design approach. The variables were temperature (T), water to monomer...

Biopolishing of cotton fabric with fungal cellulase and its effect on the morphology of cotton fibres

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Attempt has been made to analyse structural changes in cotton fibres occurred during biopolishing using cellulases obtained from Trichoderma reesei. Cellulase hydrolysis results in weight loss of the samples, which, in turn, results in the splitting of fibres and removal...

Characterization and Functionalization of Carbon Nanotubes(CNTs) Intended for Bioapplications

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A carbon nanotube is a tube-shaped material, made of carbon ,having a diameter measuring on the  nanometer scale. A nanometer is one-billionth of a meter, or about one ten-thousandth of the thickness of a human hair. Carbon nanotubes have many...

Characterization and Identification of Gas Hydrate Bearing Sediments of Oman Sea Using Seismic Methods

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تومان
Gas hydrates attracted worldwide attention due to their potential as huge energy resource in the recent decades. Therefore identifying and prospecting them is essential for strategic hydrocarbon reservoir management. Seismic methods are known as a powerful gas hydrate exploration methodology....
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