CO2 utilization for fast preparation of nanocrystalline hydrozincite

Turianicová, Erika; Kaňuchová, Mária; Zorkovská, A.; Holub, Marián; Bujňáková, Zdenka; Dutková, Erika; Baláž, Matěj; Findoráková, Lenka; Bálintová, Magdaléna; Obut, Abdullah

doi:10.1016/j.jcou.2016.08.007

Cited by 23 publications

(12 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is supported also by the EDS results. The FTIR spectrum fits well with hydrozincite, a type of zinc hydroxycarbonate, according to earlier studies [ 33 , 39 ]. However, Jambor et al has stated that the FTIR spectrum is near identical for different zinc hydroxycarbonates exhibiting slightly different stoichiometric compositions [ 35 ].…”

Section: Resultssupporting

confidence: 83%

“…Finally, a small absorption peak at 465 cm −1 can be seen as well, which is an indication of some presence of zinc oxide [ 37 , 38 ]. Moreover, in a study where hydrozincite was synthesized from ZnO, water and CO 2 , a similar peak can be found which was attributed to zinc oxide [ 39 ]. Since the nanowire structure does not cover the whole surface according to Figure 1 b, it is likely that the presence of ZnO is measured from the sample surface rather than the nanowire structure.…”

Section: Resultsmentioning

confidence: 79%

“…It is commonly known that ZnO acts as an intermediate reaction product for the formation of zinc hydroxycarbonates in atmospheric corrosion [ 1 , 33 ]. Moreover, ZnO has also been used as a starting material in hydrozincite powder synthesis together with H 2 O and pressurized CO 2 [ 39 ]. H 2 O can react directly with zinc [ 1 ] or with ZnO [ 42 ] to produce Zn(OH) 2 .…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Kaleva

Saarimaa²,

Heinonen

et al. 2017

Nanomaterials

View full text Add to dashboard Cite

In this study, we demonstrate a rapid treatment method for producing a needle-like nanowire structure on a hot-dip galvanized sheet at a temperature of 50 °C. The processing method involved only supercritical carbon dioxide and water to induce a reaction on the zinc surface, which resulted in growth of zinc hydroxycarbonate nanowires into flower-like shapes. This artificial patina nanostructure predicts high surface area and offers interesting opportunities for its use in industrial high-end applications. The nanowires can significantly improve paint adhesion and promote electrochemical stability for organic coatings, or be converted to ZnO nanostructures by calcining to be used in various semiconductor applications.

show abstract

Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Kaleva

Saarimaa²,

Heinonen

et al. 2017

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The HDZCT Tauc plot, ( αhν ) 2 versus hν , has been drawn before for Bitenc et al . and Turianicová et al . who reported HDZCT band‐gap values of 4.1 and 4.9 eV, respectively.…”

Section: Resultsmentioning

confidence: 92%

Synthesis and characterization of ZnZr composites for the photocatalytic degradation of phenolic molecules: addition effect of ZrO₂over hydrozincite Zn₅(OH)₆(CO₃)₂

Tzompantzi-Flores

Castillo-Rodríguez

Gómez

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: The composite materials ZrO 2 /Zn 5 (OH) 6 (CO 3 ) 2 were prepared in only one step by chemical co-precipitation and thermal hydrolysis of urea. ZrO 2 was added at 5, 8 and 10 mol%. The samples were dried at 80 ∘ C and characterized by adsorption-desorption of N 2 isotherms, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques, and diffuse reflectance (DRS), UV-visible, Fourier-transform infrared (FTIR) and X-ray photoelectron (XPS) spectroscopies. The materials were assessed in the photodegradation of phenol and polychlorinated phenolic molecules under UV-light irradiation. The possible mechanism was discussed from studies that corroborated or discarded the formation of the species •OH, •O 2 − and h + .RESULTS: The addition of ZrO 2 to Zn 5 (OH) 6 (CO 3 ) 2 resulted in a composite material with high photoactivity. The material containing 8 mol% of ZrO 2 (ZnZr-8.0%) was the sample with the best percentages of photodegradation and mineralization. The photodegradation enhancement was achieved partly by an increment in the specific surface area and principally due to localized states originating in the composite interphase which improved charge transfer. XPS study revealed that the ZrO 2 addition increases the oxygen vacancies which enhanced the organic molecule photodegradation via direct hole attack. CONCLUSION: The ZnZr composite system constitutes an excellent alternative for the photodegradation of persistent organic pollutants due to the low cost, high stability and null toxicity of the support Zn 5 (OH) 6 (CO 3 ) 2 .

show abstract

“…The decomposition is a single‐stage process for the both components . The decomposition process for basic zinc carbonate starts at approximately 220°C and is typically terminated by 300°C, and the heating rate has some effect on the reaction temperatures . The decomposition of zinc hydroxy carbonate proceeds at a higher rate and at a lower temperature than the decomposition of zinc carbonate .…”

Section: Resultsmentioning

confidence: 99%

Convenient extraction method for quantification of thin zinc patina layers

Saarimaa¹,

Kaleva

Paunikallio³

et al. 2018

Surface & Interface Analysis

View full text Add to dashboard Cite

Synthetic zinc patina was grown on galvanized steel sheets in supercritical carbon dioxide atmosphere. Different patina compounds were dissolved and quantified using a stepwise immersion and dissolution procedure. The distinct patina components, namely anhydrous zinc carbonate (a dense layer adjacent to metallic zinc) and zinc hydroxy carbonate (nanowires on the surface), were dissolved in glycine solutions, followed by quantification of Zn 2+ in the solutes by X-ray fluorescence. The zinc hydroxy carbonate nanowires were readily glycine soluble, and the anhydrous zinc carbonate showed scarce glycine solubility, which enabled their selective quantification. The amount of the remaining (anhydrous) zinc carbonate after glycine extraction was determined from the glycine-soluble zinc oxide after calcination (heat treatment for 10 minutes at 350°C). The results were verified by scanning electron microscopy imaging and Fourier transform infrared spectroscopy measurements.

show abstract

CO2 utilization for fast preparation of nanocrystalline hydrozincite

Cited by 23 publications

References 45 publications

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Synthesis and characterization of ZnZr composites for the photocatalytic degradation of phenolic molecules: addition effect of ZrO₂over hydrozincite Zn₅(OH)₆(CO₃)₂

Convenient extraction method for quantification of thin zinc patina layers

Contact Info

Product

Resources

About

CO2 utilization for fast preparation of nanocrystalline hydrozincite

Cited by 23 publications

References 45 publications

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Dissolution-Induced Nanowire Synthesis on Hot-Dip Galvanized Surface in Supercritical Carbon Dioxide

Synthesis and characterization of ZnZr composites for the photocatalytic degradation of phenolic molecules: addition effect of ZrO2over hydrozincite Zn5(OH)6(CO3)2

Convenient extraction method for quantification of thin zinc patina layers

Contact Info

Product

Resources

About

Synthesis and characterization of ZnZr composites for the photocatalytic degradation of phenolic molecules: addition effect of ZrO₂over hydrozincite Zn₅(OH)₆(CO₃)₂