Hollow ZnO microspheres functionalized with electrochemical graphene oxide for the photodegradation of salicylic acid

Hernández, Marcos Rodríguez; León, Arxel de; Ortiz, Edgar de Casas; Fernández, Salvador; Moggio, Ivana; Arias, Eduardo; Gallardo-Vega, Carlos; Silva, Jesús Alfonso Mercado; Barriga-Castro, Enrique Díaz

doi:10.1039/c8ra10113b

Cited by 12 publications

(3 citation statements)

References 35 publications

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“…As a metal oxide, ZnO is an attractive material that used in the opto-electronic devices [1], gas-and bio-sensors [2,3], photocatalysis devices [4] and magnetic devices [5] with unique properties such as high chemical and physical stabilization, wide optical band gap (~3.7 eV) and abundant in nature. Microstructures and nanostructures have been preferred more than their bulk counterparts because of their finite size effect and high surface to volume ratio.…”

Section: Introductionmentioning

confidence: 99%

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Sarf

Asikuzun

Yakar

2021

International Journal of Advances in Engineering and Pure Sciences

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In this study, a series of 3d transition metal (TM) (Co, Ni and Fe) doped ZnO particles synthesized by simple co-precipitation method. Structural, morphological and magnetic properties were investigated to determine correlation between growth process and ferromagnetism of metal doped ZnO samples. All samples had ZnO hexzagonal würtzite structure and slightly shift of ZnO indexed peaks was observed by TM incorporation in ZnO. Although ZnO samples had granular forms, agglomerative forms had emerged in TM:ZnO samples due to the fast growth process. The pure ZnO sample transformed paramagnetic to ferromagnetic by TM incorporation due to carrier mediated exchange interaction between TM ions. The results demonstated that doping with Fe 3+ ions in ZnO structure had enhanced ferromagnetism although fast growth and high particle agglomeration.

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Section: Introductionmentioning

confidence: 99%

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Sarf

Asikuzun

Yakar

2021

International Journal of Advances in Engineering and Pure Sciences

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“…This makes removal and destruction very expensive with conventional methods. Photocatalysis, on the other hand, is one of very few pollution-removal methods that can be viable for low-concentration pollutants [4,5].…”

Section: Introductionmentioning

confidence: 99%

Sustainable and Low-Cost Electrodes for Photocatalytic Fuel Cells

Alvi,

Sandberg

2024

Nanomaterials

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Water pollutants harm ecosystems and degrade water quality. At the same time, many pollutants carry potentially valuable chemical energy, measured by chemical oxygen demand (COD). This study highlights the potential for energy harvesting during remediation using photocatalytic fuel cells (PCFCs), stressing the importance of economically viable and sustainable materials. To achieve this, this research explores alternatives to platinum cathodes in photocathodes and aims to develop durable, cost-effective photoanode materials. Here, zinc oxide nanorods of high density are fabricated on carbon fiber surfaces using a low-temperature aqueous chemical growth method that is simple, cost-efficient, and readily scalable. Alternatives to the Pt cathodes frequently used in PCFC research are explored in comparison with screen-printed PEDOT:PSS cathodes. The fabricated ZnO/carbon anode (1.5 × 2 cm2) is used to remove the model pollutant used here and salicylic acid from water (30 mL, 70 μM) is placed under simulated sunlight (0.225 Sun). It was observed that salicylic acid was degraded by 23 ±0.46% at open voltage (OV) and 43.2 ± 0.86% at 1 V with Pt as the counter electrode, degradation was 18.5 ± 0.37% at open voltage (OV) and 44.1 ± 0.88% at 1 V, while PEDOT:PSS was used as the counter electrode over 120 min. This shows that the PEDOT:PSS exhibits an excellent performance with the full potential to provide low-environmental-impact electrodes for PCFCs.

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“…ZnO material is well known with biocompatible, antimicrobial, and low‐cytotoxic properties as well as with diverse nanomorphologies and wide applications could serve as a promising target for the search of nanoporous crystalline polymorph forms toward theoretical prediction and design of novel materials structures. [ 5-8 ] It should be noted that though the ZnO material is physically stable in terms of the Young's modulus and high‐temperature stability, its disadvantage is easily dissolved in acidic solvents and reactive gases. [ 9,10 ] Furthermore, the versatile synthesis of ZnO 3D porous materials, built from nanoscale building blocks, e.g., tetrapods, remains a challenging task.…”

Section: Introductionmentioning

confidence: 99%

Novel Chain and Ribbon ZnO Nanoporous Crystalline Phases in Cubic Lattice

Tuoc

Thảo

Lien

et al. 2021

Physica Status Solidi (b)

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The chain‐ and ribbon‐like structural hierarchies are used to design two nanoporous polymorphs composed of only four‐member and six‐member rings of ZnO as primary building blocks in cubic lattice frameworks. Specifically, the bottom‐up polymeric assembly of these small simple clusters into high cubic symmetric phases is considered, with energetic, dynamic, and mechanical stabilities proven by density‐functional‐based calculations. Both phases are rivaling with those of known cage‐like nanoporous polymorphs in many porous characteristics while preserving an intrinsic wide bandgap from ZnO tetragonal bonding. Furthermore, the design scheme is feasible to apply with different morphology motifs or extend to more cluster prototypes and materials.

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Hollow ZnO microspheres functionalized with electrochemical graphene oxide for the photodegradation of salicylic acid

Abstract: Hollow ZnO microspheres were successfully synthesized by a hydrothermal method and then functionalized with graphene oxide (GO) flakes, previously obtained through electrochemical oxidation.

Cited by 12 publications

References 35 publications

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Geçiş Metali Katkılı ZnO’in Ferromanyetizma ve Büyüme Korelasyonunun İncelenmesi

Sustainable and Low-Cost Electrodes for Photocatalytic Fuel Cells

Novel Chain and Ribbon ZnO Nanoporous Crystalline Phases in Cubic Lattice

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