Fabrication of ZnO-Zn2TiO4 nanocomposite from zinc hydroxide nitrate and its photocatalytic efficiency

Pinto, Rodrigo B.; Peralta‐Zamora, Patricio

doi:10.1016/j.jphotochem.2017.11.008

Cited by 18 publications

(4 citation statements)

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“…Metal–oxygen clusters, named first by Pope and Müller, as a category of compounds with uniqueness in their structural and electronic versatility, are momentous in a number of domains, such as magnetism, catalysis, electrochemistry, etc. − They stand out principally because of their superb versatility in structure and composition. , Therefore, different chemical compositions can have diverse physicochemical properties. Given the aforementioned advantages and the report from Pinto et al and Mantovani et al, certain metal–oxygen clusters could directly act as photocatalysts or as the carriers of composites for photocatalytic reactions. In addition, previous work has proved that cobalt as an active site plays an important role in improving the photocatalytic reduction of carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

“…39,40 Therefore, different chemical compositions can have diverse physicochemical properties. Given the aforementioned advantages and the report from Pinto et al 41 and Mantovani et al, 42 certain metal−oxygen clusters could directly act as photocatalysts or as the carriers of composites for photocatalytic reactions. In addition, previous work has proved that cobalt as an active site plays an important role in improving the photocatalytic reduction of carbon dioxide.…”

Section: ■ Introductionmentioning

confidence: 99%

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Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction

et al. 2023

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In the field of recycling CO 2 , the photocatalytic CO 2 reduction reaction (CO 2 RR) is a typical example, and researchers have designed a variety of photocatalysts to improve the conversion rate of CO 2 over the years. In this paper, two metal−oxygen clusters are designed and formulated as [Co 3 Zn(OH) 6 (SO 4 )]• 4H 2 O (1) and [Ni 3 Zn(OH) 6 (SO 4 )]•4H 2 O (2). As for compound 1, the main structure is composed of {CoO 6 } octahedra connected by edge-sharing to form a twodimensional layer, on which {ZnO 4 } and {SO 4 } tetrahedra are supported. More interestingly, compound 1 has outstanding photocatalytic activity, which is mainly attributed to the open-framework structure and the cobalt ions as active sites. Upon catalysis for eight hours, its maximum CO generation rate is 9982.13 μmol g −1 h −1 , with a selectivity of 81.8%. Additionally, compound 1 takes on weak antiferromagnetic coupling due to Co(II) ions.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction

et al. 2023

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“…The results show a maximum degradation efficiency of 95% (Wan et al 2010 ). In situ synthesis of ZnO/Zn 2 TiO 4 nanocomposite from zinc hydroxide nitrate and evaluation of its photocatalytic performances by reactive black 5 dye was investigated by Pinto et al ( 2018 ). Complete photodegradation of the pollutant achieved after 60 min under visible light irradiation.…”

Section: Introductionmentioning

confidence: 99%

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Janani

Khiar

Taoufik

et al. 2022

Environ Sci Pollut Res

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In this study, ZnO-Zn 2 TiO 4 (ZTM) material was prepared through a novel synthesis method based on a ultrasound-assisted polyol-mediated process followed by calcination at a different temperature. Physical features of the samples were studied by using various analysis techniques including XRD, FT-IR, SEM/EDX, pH PZC , and UV–Vis DRS. Subsequently, the materials were employed as catalysts for the photocatalytic degradation of clofibric acid as a model pharmaceutical contaminant. The photocatalytic performance was evaluated under different conditions of calcination temperature, catalyst dosage, starting concentration, and initial pH of clofibric acid solution. The finding results revealed that hexagonal-tetragonal phases of ZnO-Zn 2 TiO 4 calcined at 600 °C (ZTM-600) with an average crystallite size of 97.8 Å exhibited the best degradation efficiency (99%). The primary bands characteristic of ZnO and Zn 2 TiO 4 were displayed by FT-IR analysis and the UV–visible DRS confirms the larger absorption capacity in UV–visible regions. The photogenerated electrons are the powerful reactive species involved in clofibric acid photodegradation process. This study shows a promising photocatalyst and provides new sight to rational design the facets of photocatalysis process for enhanced photocatalytic performances and effective wastewater treatment.

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“…The great versatility of Titanium and zinc-based oxide applications, many related to photocatalysis, has been reported in the literature [ 1 ]. However, recently these compounds have attracted special attention for electrical applications, for example, as dielectric materials for capacitors and microwaves.…”

Section: Introductionmentioning

confidence: 99%

Properties of zinc titanates synthesized by microwave assisted hydrothermal method

Gonzales

Hartwig

Fassbender

et al. 2021

Heliyon

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Zinc titanates are compounds that have shown great application versatility, including in the field of semiconductors. Solid state reactions, the polymeric precursor method and the hydrothermal method are the most mentioned synthesis of these compounds in the literature. In the present work, we use microwave assisted hydrothermal method (MAH) to synthesize zinc titanate and evaluate its potential for solar cell applications through structural and optical characterization techniques. The synthesized samples were also subjected to a variable temperature heat treatment in the range of 500 °C–800 °C. The analysis showed that the crystallization of the material starts at 500 °C and that samples submitted to temperatures of 600 °C–800 °C showed the formation of two phases of zinc titanates, being a cubic phase of ZnTiO 3 , considered rare in the literature, predominant up to a temperature of 800 °C. The optical characterization, based on the techniques of photoluminescence spectroscopy and UV-Visible spectroscopy, showed that the photoluminescent activity and the energy of the band gap increased with the increase of the temperature of the heat treatment, having the highest response in 700 °C, facts that can be linked to the predominant formation of the cubic phase of ZnTiO 3 and simultaneous of the cubic and rhombohedral phases of ZnTiO 3 at 700 and 800 °C. Finally, we highlight as the most important results, the fact that it was possible to obtain these titanates at a temperature lower than that reported in the literature, and that the heat-treated sample at 500 °C is the one with the lowest energy expenditure to be synthesized and the one with the greatest potential for application in dye-sensitized solar cells (DSSC's).

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Fabrication of ZnO-Zn2TiO4 nanocomposite from zinc hydroxide nitrate and its photocatalytic efficiency

Cited by 18 publications

References 46 publications

Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction

Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Properties of zinc titanates synthesized by microwave assisted hydrothermal method

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Fabrication of ZnO-Zn2TiO4 nanocomposite from zinc hydroxide nitrate and its photocatalytic efficiency

Cited by 18 publications

References 46 publications

Layered Co–O Cluster Applied to Photocatalytic CO2 Reduction

Layered Co–O Cluster Applied to Photocatalytic CO2 Reduction

ZnO-Zn2TiO4 heterostructure for highly efficient photocatalytic degradation of pharmaceuticals

Properties of zinc titanates synthesized by microwave assisted hydrothermal method

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Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction

Layered Co–O Cluster Applied to Photocatalytic CO₂ Reduction