Ag/TiNPS nanocatalyst: biosynthesis, characterization and photocatalytic activity

Muraro, Pâmela Cristine Ladwig; Wouters, Robson Dias; Pavoski, Giovani; Espinosa, Denise Crocce Romano; Ruiz, Yolice Patricia Moreno; Galembeck, André; Rech, Virgínia Cielo; Silva, W.L. da

doi:10.1016/j.jphotochem.2023.114598

Cited by 25 publications

(4 citation statements)

References 47 publications

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“…Nanotechnology continues to gain momentum as a powerful tool in addressing environmental challenges, establishing itself as one of the most significant applications in different fields, such as water depuration [44], gas cleaning [45], green synthesis [46], catalysis [43], etc. This can be attributed to the profound understanding of nanoparticle properties, enabling the development of novel synthesis methods, and enhancing environmental applications [47].…”

Section: Nanoparticles In Environmental Applicationsmentioning

confidence: 99%

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Rodríguez-Rasero,

Montes-Jimenez,

Alexandre-Franco

et al. 2024

Water

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This review article addresses the increasing environmental concerns posed by synthetic dyes in water, exploring innovative approaches for their removal with a focus on zero-valent iron nanoparticles (nZVIs) synthesized through environmentally friendly methods. The article begins by highlighting the persistent nature of synthetic dyes and the limitations of conventional degradation processes. The role of nanoparticles in environmental applications is then discussed, covering diverse methods for metallic nanoparticle production aligned with green chemistry principles. Various methods, including the incorporation of secondary metals, surface coating, emulsification, fixed support, encapsulation, and electrostatic stabilization, are detailed in relation to the stabilization of nZVIs. A novel aspect is introduced in the use of plant extract or biomimetic approaches for chemical reduction during nZVI synthesis. The review investigates the specific challenges posed by dye pollution in wastewater from industrial sources, particularly in the context of garment coloring. Current approaches for dye removal in aqueous environments are discussed, with an emphasis on the effectiveness of green-synthesized nZVIs. The article concludes by offering insights into future perspectives and challenges in the field. The intricate landscape of environmentally friendly nZVI synthesis has been presented, showcasing its potential as a sustainable solution for addressing dye pollution in water.

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Section: Nanoparticles In Environmental Applicationsmentioning

confidence: 99%

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Rodríguez-Rasero,

Montes-Jimenez,

Alexandre-Franco

et al. 2024

Water

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“…These negatively charged nanoparticles could enhance the absorption of cationic dyes (RhB and MB). [48] Nitrogen Adsorption/Desorption Figure 9 exhibits the adsorption-desorption isotherms of pure ZnO nanoparticles and Au-ZnO. The adsorption isotherm of the ZnO sample is classified as type IV with H1 hysteresis according to IUPAC library.…”

Section: Zeta Potentialmentioning

confidence: 99%

Control Synthesis of Metallic Gold Decorated ZnO Nanoparticles for Photocatalytic Degradation of Rhodamine B, Methylene Blue and Eriochrome Black T Dyes

Soli,

Jraba,

Elaloui

2023

ChemistrySelect

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Pure ZnO and metallic gold (Au) decorated ZnO (Au‐ZnO) nanoparticles were prepared by a modified sol‐gel method employing (CTAB, C19H42BrN) as a cationic surfactant. XRD analysis shows the wurtzite hexagonal structure of pure ZnO and confirms the modification in the structure with the decoration of Au metal in ZnO. TEM characterization illustrates the dispersion of metallic gold on the hexagonal surface of ZnO which confirms the result obtained by XRD. The ZnO and Au‐ZnO nanoparticles had negative charge surface values (−16.7 eV) and (−36.6 eV) which enhance an excellent degradation for cationic dyes. Optical studies show that gap energy decreases from 3.19 eV to 3.11 eV upon the decoration of Au on ZnO surface. The decrease in photoluminescence intensity reflects the positive effects of the role of metallic Au on the photodegradation capacity of Au‐ZnO. Photocatalytic results show that Au‐ZnO exhibits a higher efficiencies degradation of 93 % (k=0.016 min−1) in the case of Rhodamine B and 73 % (k=0.001 min−1) of Methylene blue compared to pure ZnO. In the case of Eriochrome Black T, Au‐ZnO presents low degradation efficiency.

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“…With the development of industry and technology, human health and the earth’s ecosystem are seriously threatened by water contamination caused by the massive release of organic dyes, heavy metals, and antibiotics. − Hence, there is an urgent need to tackle the issue of wastewater pollution in effective ways. Currently, commonly available methods include physical adsorption, biodegradation, photocatalysis, and membrane filtration. − Among them, photocatalysis has been utilized to treat dyes in wastewater because of its simple operation, high efficiency, and recyclability. , Traditional inorganic semiconductors, such as TiO 2 , ZnO, SnO 2 , PbS, and BiVO 4 , are used as photocatalytic materials. − However, photocatalytic performance of the semiconductors is less satisfactory due to their poor adsorption property, low utilization of irradiation light, low separation efficiency of photogenerated charges (e – –h + pairs), and secondary pollution. Frequently, numerous substrates such as graphene, biomass-derived carbon, carbon nanotubes, and metal–organic frameworks have been employed to combine with the semiconductors for improving their adsorption capacity and the separation efficiency of photogenerated e – –h + pairs, thus improving the photocatalytic performance. − For instance, Yang et al adopted the cation-exchange strategy to fabricate the Cu 2+ -doped ZnS-rGO composite with excellent photocatalytic activity .…”

Section: Introductionmentioning

confidence: 99%

Exploitation of a Poly Acrylic Acid-Fe³⁺ Hydrogel Photocatalyst with Homogeneous and Heterogeneous Features for the Efficient Removal of Organic Pollutants

Gao,

Zhong,

Tong

et al. 2024

ACS Appl. Polym. Mater.

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Photocatalysis provides a possibility of fully degrading organic pollutants from wastewater; however, traditional semiconductor photocatalysts are restricted by poor adsorption properties, limited utilization of light energy, loss of the catalyst, and secondary pollution. In this work, a transparent poly acrylic acid-Fe 3+ (PAA-Fe 3+ ) hydrogel with homogeneous and heterogeneous catalytic features and excellent photocatalytic performance was herein smartly constructed through a facile one-step synthesis approach. Experimental and theoretical calculation results verify that the introduced Fe 3+ ions coordinate with −COOH (L) functional groups on the chain of PAA to form complex [FeL 6 ] 3+ ions, which not only improve the mechanical property of the PAA hydrogel but also act as photocatalytic active sites with homogeneous features to efficiently degrade photoinduced-enriched pollutant molecules (MB: 96% in 40 min). The photocatalytic behavior of PAA-Fe 3+ is suggested according to the molecular orbital theory of the complex, and active species are captured and • OH/h + are demonstrated to be the main active substances in the photocatalytic process.

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Ag/TiNPS nanocatalyst: biosynthesis, characterization and photocatalytic activity

Cited by 25 publications

References 47 publications

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Control Synthesis of Metallic Gold Decorated ZnO Nanoparticles for Photocatalytic Degradation of Rhodamine B, Methylene Blue and Eriochrome Black T Dyes

Exploitation of a Poly Acrylic Acid-Fe³⁺ Hydrogel Photocatalyst with Homogeneous and Heterogeneous Features for the Efficient Removal of Organic Pollutants

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Ag/TiNPS nanocatalyst: biosynthesis, characterization and photocatalytic activity

Cited by 25 publications

References 47 publications

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Use of Zero-Valent Iron Nanoparticles (nZVIs) from Environmentally Friendly Synthesis for the Removal of Dyes from Water—A Review

Control Synthesis of Metallic Gold Decorated ZnO Nanoparticles for Photocatalytic Degradation of Rhodamine B, Methylene Blue and Eriochrome Black T Dyes

Exploitation of a Poly Acrylic Acid-Fe3+ Hydrogel Photocatalyst with Homogeneous and Heterogeneous Features for the Efficient Removal of Organic Pollutants

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Product

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Exploitation of a Poly Acrylic Acid-Fe³⁺ Hydrogel Photocatalyst with Homogeneous and Heterogeneous Features for the Efficient Removal of Organic Pollutants