Mechanism of contact nucleation

Denk, Edward G.; Botsaris, Gregory D.

doi:10.1016/0022-0248(72)90320-x

Cited by 40 publications

(27 citation statements)

References 4 publications

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“…At these conditions it was determined that nucleation rates were about 1 x 108 nuclei/s/m3 of solution. The calculated nucleation rate using Equation (6) was about a factor of 100 higher than what Ottens had measured. The principal factors causing this difference are believed to be the same as those given in discussing Genck and Larson's data.…”

mentioning

confidence: 53%

Influence of crystal size on the rate of contact nucleation in stirred‐tank crystallizers

1974

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mentioning

confidence: 53%

Influence of crystal size on the rate of contact nucleation in stirred‐tank crystallizers

1974

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“…The mechanism of particle formation during seeding has been researched extensively [27][28][29]. Qian and Botsaris [29] presented the so-called "embryo coagulation secondary nucleation (ECSN)" model, which combines classical nucleation theory with colloid science.…”

Section: Resultsmentioning

confidence: 99%

The Synthesis of Anatase Nanoparticles and the Preparation of Photocatalytically Active Coatings Based on Wet Chemical Methods for Self-Cleaning Applications

Verhovšek

Veronovski

Štangar

et al. 2012

International Journal of Photoenergy

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We report on an improved sol-gel method for the production of highly photocatalytic titanium dioxide (TiO 2 ) anatase nanoparticles which can provide appropriate control over the final characteristics of the nanoparticles, such as particle size, crystallinity, crystal structure, morphology, and also the degree of agglomeration. The synthesized anatase nanoparticles were characterized using various techniques, such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and were tested in coatings for self-cleaning glass and ceramic surfaces. The coatings were prepared using a soft chemistry route and are completely transparent to visible light and exhibit a high photocatalytic effect, which was determined by contact-angle measurements. Finally, it is worth mentioning that both the sol-gel synthesis method and the coating-preparation method are based on a wet chemical process, thus presenting no risk of handling the TiO 2 anatase nanoparticles in their potentially hazardous powder form at any stage of our development. Low-price, easy-to-handle, and nontoxic materials were used. Therefore, our work represents an important contribution to the development of TiO 2 anatase nanoparticle coatings that provide a high photocatalytic effect and can thus be used for numerous applications.

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“…supersaturation for sodium chlorate (Denk and Botsaris, 1972), critical crystal size for potassium alum (Rousseau et al, 1976;Toyokura et al, 1979), and nucleation rate increasing at higher supersaturation and magma density for several substances (Garside and Shah, 1980). The critical size for inducing contact nucleation has been found in the size range 150 to 225 pm for potassium alum, magnesium sulfate, calcium sulfate and calcite.…”

Section: Contact Nucleationmentioning

confidence: 95%

Size‐Dependent growth and contact nucleation of calcite crystals

1993

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The growth kinetics and contact nucleation of calcite crystals were studied in a pH-stat crystallizer. Large seed crystals up to 230 pm were successfully prepared by the gel growth technique. The crystal growth data over a wide range of crystal sizes were evaluated from titration curves by an initial slope method and then analyzed by the two-step model. The mass-transfer and surface integration rates were found to be functions of crystal size with the exception of mass-transfer rates of small crystals less than 10 pm. The controlling step of crystal growth process was tested using the effectiveness factor concept. Large seed crystals of calcite induced contact nucleation when a stainless-steel impeller was used for agitation. The important features of contact nucleation for calcite crystals were explored and compared with those of soluble substances.

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Mechanism of contact nucleation

Cited by 40 publications

References 4 publications

Influence of crystal size on the rate of contact nucleation in stirred‐tank crystallizers

Influence of crystal size on the rate of contact nucleation in stirred‐tank crystallizers

The Synthesis of Anatase Nanoparticles and the Preparation of Photocatalytically Active Coatings Based on Wet Chemical Methods for Self-Cleaning Applications

Size‐Dependent growth and contact nucleation of calcite crystals

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