Development of a novel engineered stone containing a CuO/SiO2 nanocomposite matrix with biocidal properties

Zarzuela, Rafael; Gil, M.L. Almoraima; Carretero, Jesús; Carbú, María; Cantoral, Jesús M.; Mosquera, María J.

doi:10.1016/j.conbuildmat.2021.124459

Cited by 9 publications

(6 citation statements)

References 52 publications

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“…(iii) Lower propensity to undergo decay phenomenon, such as efflorescence, decay due to salt crystallization or salt fog, an alteration that occurs in the presence of polluted environments [23]; (iv) The manufacturing process enables the direct production of elements with specified dimensions (such as tiles, bricks, and panels), thereby minimizing costs linked to processing (such as cutting) or transportation [23].…”

Section: Environmental Economic and Technical Sustainability Analysis...mentioning

confidence: 99%

A Novel Approach for the Reuse of Waste from the Extractive and Processing Industry of Natural Stone Binders: Development of Stone Composites

Afonso,

Pires,

Faria

et al. 2023

Sustainability

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This paper discusses the historical use of natural stone for various purposes and highlights the substantial waste generated by quarries and stone processing plants in modern industrialized production. These waste materials are typically categorized into unused rock and sludges from processing. This accumulation of waste presents a global environmental challenge and a financial burden for the stone industry. In-depth investigation into the development of a binder incorporating carbonated sludge from marble and limestone industries, combined with polyester resin, for building stone composites was performed. This research involved chemical and microstructural characterization of the sludges, preparation of mixtures with polyester resin, stone composites manufacturing, and subsequent testing to determine and validate the optimal binder composition. Given the achieved results, and the demonstrated feasibility of using a binder composed of polyester resin and carbonated sludge for stone composite production, it was concluded that employing carbonated sludge as an economic resource is indeed viable.

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Section: Environmental Economic and Technical Sustainability Analysis...mentioning

confidence: 99%

A Novel Approach for the Reuse of Waste from the Extractive and Processing Industry of Natural Stone Binders: Development of Stone Composites

Afonso,

Pires,

Faria

et al. 2023

Sustainability

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“…[7,15] It is then highly desirable to look for novel synergistic approaches combining different properties in a single nanostructured treatment. Some studies proposing dual nanosystems have been recently reported, including SiO 2 /Ag, [17] AgÀ TiO 2 /PDMS, [18] Ag/TiO 2, [19] CuO/SiO 2 , [20] TiO 2 /SiO 2 [21] nanomaterials. Calcium hydroxyzincate [CaZn 2 (OH) 6 • 2H 2 O, CHZ] nanomaterials [22][23][24] were also proposed, in order to benefit from both consolidation properties of calcium compounds and antimicrobial activity of zinc(II) species.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Synthesis and Analytical Characterization of Hybrid Zinc/Calcium Antimicrobial Nano‐Oxides for Cultural Heritage Applications

et al. 2023

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The present study proposes the one-step synthesis of Zn/Ca hybrid nano-oxides combining an electrochemical route to ZnO nanostructures (NSs) with the wet chemical production of Ca(OH) 2 NSs. ZnO is a known antimicrobial and Ca(OH) 2 has consolidating properties, both appealing for stone artwork preservation in the field of cultural heritage. Two concentrations of the electrolytic bath (NaOH 0.1 and 0.4 M) were studied resulting in distinct final nanomaterials (ZnÀ Ca0.1 and ZnÀ Ca0.4). Fourier transform infrared, X-ray photoelectron spectroscopies, and transmission electron microscopy demonstrated that ZnÀ Ca0.1 consisted of lamellar calcium hydroxyzincate NSs, whereas ZnÀ Ca0.4 showed hexagonal Ca(OH) 2 ( 500 nm) and ZnO (~50 nm) NSs. Nanocoatings prepared with ZnÀ Ca0.1 exhibited a Zn 2 + release increasing up to 1 μmol cm À 2 in 24 h. Instead, ZnÀ Ca0.4-based nanocoatings released a constant value of about 0.35 μmol/cm 2 . Both types of nanocoatings showed good antimicrobial activity against Bacillus subtilis after 48 h and hydrophilic behavior over 28 days.

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“…ZnO and TiO 2 are widely studied in the literature because they are used as photocatalysts [20] and dye sensitized solar cell [21]. CuO, ZnO and TiO 2 are commonly used as catalysts in different reaction [22], particularly in organic synthesis [23], moreover they have biocidal properties and this makes them useful in water decontamination [24] and stone protection in the field of cultural heritage [25,26].…”

Section: Introductionmentioning

confidence: 99%

The effect of nanocrystalline TiO2 on structure and catalytic activity of CuO–ZnO in combined methanol reforming

Pinzari¹

2023

Reac Kinet Mech Cat

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CuO–ZnO (CZ) and CuO–ZnO/TiO2 (CZT) catalysts have been prepared by co-precipitation, characterized by X-ray diffraction, surface area measurements and chemical analysis and tested in the combined methanol reforming reaction. Catalytic tests have been performed in the temperature range 200–400 °C with a GHSV = 55.000 h−1, after H2 reducing pretreatment at 250 °C or 450 °C. It is shown that nanocrystalline TiO2 influences the CuO–ZnO nanosized structure, reducibility and reactivity. TiO2 slightly increases ZnO crystallite size of the fresh catalyst. Moreover, it causes the CuO chemical reduction to nanosized Cu2O on exhaust catalyst pretreated in hydrogen at 250 °C, this improves the reaction with higher methanol conversion and hydrogen production. On the contrary, TiO2 reduces CuO to submicron Cu0 and greatly increases ZnO crystallite size on the exhaust catalyst pretreated in hydrogen at 450 °C, this treatment weakens the reaction, with lower methanol conversion and hydrogen production. In both cases, nanocrystalline TiO2 presence is able to decrease the CO formation: independently of the hydrogen pretreatment temperature. This ability of the nanocrystalline TiO2 is ascribed to the presence of the oxygen vacancies, which act as electron donors that contribute to hinder CO2 and H2 surface adsorption for steric, electrostatic and probabilistic factors.

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Development of a novel engineered stone containing a CuO/SiO2 nanocomposite matrix with biocidal properties

Cited by 9 publications

References 52 publications

A Novel Approach for the Reuse of Waste from the Extractive and Processing Industry of Natural Stone Binders: Development of Stone Composites

A Novel Approach for the Reuse of Waste from the Extractive and Processing Industry of Natural Stone Binders: Development of Stone Composites

Electrochemical Synthesis and Analytical Characterization of Hybrid Zinc/Calcium Antimicrobial Nano‐Oxides for Cultural Heritage Applications

The effect of nanocrystalline TiO2 on structure and catalytic activity of CuO–ZnO in combined methanol reforming

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