Electrochemical reduction and capacitance of hybrid titanium dioxides—nanotube arrays and “nanograss”

Du, Kang; Li, Guohua; Li, Mengwei; Wu, Chenggen; Chen, Xuyuan

doi:10.1016/j.electacta.2016.05.027

Cited by 28 publications

(12 citation statements)

References 43 publications

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“…Figure a–d show the morphology of the ATNAs soaked for 0, 20, 40, and 60 min, respectively. It can be seen that the surfaces of all samples still exhibit nanopores rather than nanograss , owing to the larger nanotube diameter (Figure c). The specific capacitance of nanotubes is attributed to the appearance of nanograss in refs and .…”

Section: Resultsmentioning

confidence: 98%

Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte

Zhang

Zhu

et al. 2019

Langmuir

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TiO 2 is an attractive electrode material in fast charging/ discharging supercapacitors because of its high specific surface area. However, the low capacitance of TiO 2 nanotubes as-anodized in the classical electrolyte restricts their further application in supercapacitors. Here, we study the performances of larger-diameter nanotubes with a double-layer structure fabricated in an NH 4 F/phosphoric acid (H 3 PO 4 ) mixed electrolyte. Results show that the double-layer structure increased the specific surface area of nanotubes owing to the cavities between the double layers and the porous structure on walls. After soaking in H 3 PO 4 aqueous solution for 40 min, the nanotubes anodized in the mixed electrolyte containing 6 wt % H 3 PO 4 show a specific capacitance of 13.89 mF cm −2 , ∼3.11 times that of the pristine nanotubes in the classical electrolyte. The specific surface area of the soaked nanotubes is up to 113.2 m 2 g −1 , which is ∼2.94 times that of the pristine nanotubes. The values of specific surface area of the anodized nanotubes and the soaked nanotubes fabricated in the mixed electrolyte containing 6 wt % H 3 PO 4 are roughly equal. It demonstrated that the specific surface area increased mainly due to the double-layer structure. The double-layer structure reveals a new strategy to enhance the specific capacitance of TiO 2 nanotubes.

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Section: Resultsmentioning

confidence: 98%

Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte

Zhang

Zhu

et al. 2019

Langmuir

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“…Further, it has also been suggested that ECM-mimicking surfaces can augment metabolic and osteogenic functions . Our ZrO 2 NG surfaces are an interconnected nanowire-like architecture that can influence the activity of key cells such as osteoblasts and fibroblasts. , Compared with other nanostructures, NG is more randomly organized but has larger surface area. − Interestingly, various studies have explored the use of NG for electronic applications but not toward biomedical uses (enhanced cell bioactivity). − Indeed, the potential of NG is yet to be explored in the field of dentistry/orthopedics for the enhancement of implant integration.…”

Section: Resultsmentioning

confidence: 99%

“…44 Our ZrO 2 NG surfaces are an interconnected nanowire-like architecture that can influence the activity of key cells such as osteoblasts and fibroblasts. 45,46 Compared with other nanostructures, NG is more randomly organized but has larger surface area. 47−49 Interestingly, various studies have explored the use of NG for electronic applications but not toward biomedical uses (enhanced cell bioactivity).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Micro + Nano: Conserving the Gold Standard Microroughness to Nanoengineer Zirconium Dental Implants

Chopra

Gulati

Ivanovski

2021

ACS Biomater. Sci. Eng.

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Zirconium has achieved popularity as a biomaterial for dental and orthopedic implants; however, its bioinertness can compromise implant-tissue integration, especially in compromised patient conditions. More recently, various nanoengineering strategies have been explored to enhance the bioactivity of Ti-based implants; however, nanoengineering of Zr-based implants has not been adequately explored. In this pioneering attempt, we report on the optimized fabrication of various nanostructures on microrough Zr surfaces and explore the influence of the underlying surface topography. In-depth optimization of electrochemical anodization (EA) is performed by tuning various parameters, including substrate topography, voltage/current and time, onto microrough (micromachined) and extremely rough Zr substrates, which represent clinically relevant implant surfaces. Variations of EA factors yielded various nanotopographies, including nanotubes, nanograss and nanotemplates, offering different topographical and chemical combinations. EA optimization and precise current–voltage recording was performed to arrive at clinically translatable and reproducible nanostructures on Zr surfaces. This study will pave the way toward the fabrication of the next generation of nanoengineered Zr-based orthopedic and dental implants.

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“…For example, for one-dimensional materials such as TiO 2 nanotubes or nanowires it has been found that the interconnection between them modify the electron transport mechanisms and, consequently, inhibits the charge transfer [44,45]. While this feature has been exploited 6 for some capacitor-related applications where the large surface area increases the capacitance obtained [46,47], the nanograss formation represents an important limitation for using NT-TiO 2 films in photovoltaic [4,41,45,48] and photocatalysis applications [49,50] due to reduced light absorption, low ionic transport and blockage of the tube mouths access to chemical species. Despite of the effort in this research area, the lack of in situ experimental measurements does not allow obtaining a single accepted mechanism for understanding the NT-TiO 2 films formation and structural defects on their surface.…”

Section: Introductionmentioning

confidence: 99%

The keys to avoid undesired structural defects in nanotubular TiO2 films prepared by electrochemical anodization

Broens

Cervantes

Jerez

et al. 2020

Ceramics International

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Electrochemical reduction and capacitance of hybrid titanium dioxides—nanotube arrays and “nanograss”

Cited by 28 publications

References 43 publications

Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte

Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte

Micro + Nano: Conserving the Gold Standard Microroughness to Nanoengineer Zirconium Dental Implants

The keys to avoid undesired structural defects in nanotubular TiO2 films prepared by electrochemical anodization

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Electrochemical reduction and capacitance of hybrid titanium dioxides—nanotube arrays and “nanograss”

Cited by 28 publications

References 43 publications

Enhanced Capacitance of TiO2 Nanotubes with a Double-Layer Structure Fabricated in NH4F/H3PO4 Mixed Electrolyte

Enhanced Capacitance of TiO2 Nanotubes with a Double-Layer Structure Fabricated in NH4F/H3PO4 Mixed Electrolyte

Micro + Nano: Conserving the Gold Standard Microroughness to Nanoengineer Zirconium Dental Implants

The keys to avoid undesired structural defects in nanotubular TiO2 films prepared by electrochemical anodization

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Product

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Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte

Enhanced Capacitance of TiO₂ Nanotubes with a Double-Layer Structure Fabricated in NH₄F/H₃PO₄ Mixed Electrolyte