Adsorption properties of pristine and Co-doped TiO2(1 0 1) toward dissolved gas analysis in transformer oil

Tao, Jiagui; Li, Wenjun; He, Xin; Ding, Zhuyu; Xu, Lingna

doi:10.1016/j.apsusc.2019.145163

Cited by 87 publications

(38 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the insulation of a transformer fails due to overheating and partial discharge, a serious discharge accident will occur. Therefore, finding an effective method that accurately detects the concentration and types of dissolved gases or insulating gas decomposition components in a transformer is necessary to monitor the operating state of the transformer [8,[39][40][41]. The traditional approach is to look for materials with good gas adsorption in transition elements, which are rich in d electrons, such as Pd(1 1 1) [39].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

et al. 2020

View full text Add to dashboard Cite

Titanium and titanium alloys are widely used in orthopedic implants. Modifying the nanotopography provides a new strategy to improve osseointegration of titanium substrates. Filamentous actin (F-actin) polymerization, as a mechanical loading structure, is generally considered to be involved in cell migration, endocytosis, cell division, and cell shape maintenance. Whether F-actin is involved and how it functions in nanotube-induced osteogenic differentiation of mesenchymal stem cells (MSCs) remain to be elucidated. In this study, we fabricated TiO2 nanotubes on the surface of a titanium substrate by anodic oxidation and characterized their features by scanning electron microscopy (SEM), X-ray energy dispersive analysis (EDS), and atomic force microscopy (AFM). Alkaline phosphatase (ALP) staining, Western blotting, qRT-PCR, and immunofluorescence staining were performed to explore the osteogenic potential, the level of F-actin, and the expression of MKL1 and YAP/TAZ. Our results showed that the inner diameter and roughness of TiO2 nanotubes increased with the increase of the anodic oxidation voltage from 30 to 70 V, while their height was 2 μm consistently. Further, the larger the tube diameter, the stronger the ability of TiO2 nanotubes to promote osteogenic differentiation of MSCs. Inhibiting F-actin polymerization by Cyto D inhibited osteogenic differentiation of MSCs as well as the expression of proteins contained in focal adhesion complexes such as vinculin (VCL) and focal adhesion kinase (FAK). In contrast, after Jasp treatment, polymerization of F-actin enhanced the expression of RhoA and transcription factors YAP/TAZ. Based on these data, we concluded that TiO2 nanotubes facilitated the osteogenic differentiation of MSCs, and this ability was enhanced with the increasing diameter of the nanotubes within a certain range (30–70 V). F-actin mediated this process through MKL1 and YAP/TAZ.

show abstract

Section: Discussionmentioning

confidence: 99%

“…To fabricate the nanotopography, TiO 2 nanotubes were formed on a pure titanium substrate by using anodic oxidation equipment at different constant voltages (30,40,50,60, and 70 V) for 1 h (Fig. 1).…”

Section: Surface Characterizationmentioning

confidence: 99%

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

et al. 2020

View full text Add to dashboard Cite

show abstract

“… 13 − 15 As a result, the insulation performance of the oil would deteriorate causing serious power accidents such as oil spills, massive blackout, and even explosion of the transformers. 16 , 17 Therefore, dissolved gas analysis (DGA) 18 is proposed through sensing the dissolved gases in the transformer oil to evaluate the operation status of such devices. 19 Undoubtedly, the gas sensing method with advantages of a rapid response, high sensitivity, and low cost is considered to detect these characteristic gases and has been deemed as one of the most workable approaches for the DGA end.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Insight into Pd-Doped ZnO Monolayers as a Promising Scavenger for Dissolved Gas Analysis in Transformer Oil

Zhou

Zhang

2020

ACS Omega

View full text Add to dashboard Cite

ZnO monolayers with desirable n-type semiconducting properties are full of potential for sensing applications. In this work, we investigate using first-principles theory the adsorption and sensing behaviors of Pd-doped ZnO (Pd-ZnO) monolayers with two typical dissolved gases, namely, H 2 and C 2 H 2 , to explore their sensing use for dissolved gas analysis in transformer oil. For Pd doping on the pristine ZnO monolayer, the T O site is identified as the most stable configuration with an E b of −1.44 eV. For the adsorption of H 2 and C 2 H 2 , chemisorption is determined given the large adsorption energy ( E ad ) and formation of new bonds. Analyses of the charge density difference and density of state provide evidence of the strong binding force of Pd–H and Pd–C bonds, while band structure analysis provides the sensing mechanism of the Pd-ZnO monolayer as a resistance-type sensor for H 2 and C 2 H 2 detection with high electrical responses. Also, analysis of the work function (WF) provides the possibility of selective detection of H 2 and C 2 H 2 using a Pd-ZnO monolayer-based field-effect transistor sensor given the opposite changing trend of the WF after their adsorption. Our work may broaden the application of ZnO-based gas sensors for application in the field of electrical engineering.

show abstract

“…Moisture content is measured by the amount of hydrogen in the interaction of transformer oil with calcium hydride for a specified time [2]. The gas content is calculated using an absorbiometer [3], Fourier transform infrared spectroscopy [4] or chromatograph [5].…”

Section: Introductionmentioning

confidence: 99%

Using Field-Effect Gas Sensors for Monitoring H₂ in Transformer Oil

et al. 2020

View full text Add to dashboard Cite

Hydrogen can be released during the thermal decomposition of organic materials, therefore, monitoring its level in the working industrial high-voltage transformer oil allows you to identify the development of degenerative processes in advance, because these processes can lead to an accident in the future. In experiments has shown that highly sensitive and small-sized field effect gas sensor based on the metal-insulator-semiconductor structure can be used for measuring of Hydrogen in oil with direct contact of its structure with transformer oil. Given the harsh environmental conditions of hydrogen measurement the field effect capacity type gas sensor were fabricated by using laser micromilling technique for fabrication compact ceramic surface mounting device package and microheater for sustentation working temperature of metal-insulator-semiconductor structure.

show abstract

Adsorption properties of pristine and Co-doped TiO2(1 0 1) toward dissolved gas analysis in transformer oil

Cited by 87 publications

References 40 publications

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

First-Principles Insight into Pd-Doped ZnO Monolayers as a Promising Scavenger for Dissolved Gas Analysis in Transformer Oil

Using Field-Effect Gas Sensors for Monitoring H₂ in Transformer Oil

Contact Info

Product

Resources

About

Adsorption properties of pristine and Co-doped TiO2(1 0 1) toward dissolved gas analysis in transformer oil

Cited by 87 publications

References 40 publications

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

F-actin Regulates Osteoblastic Differentiation of Mesenchymal Stem Cells on TiO2 Nanotubes Through MKL1 and YAP/TAZ

First-Principles Insight into Pd-Doped ZnO Monolayers as a Promising Scavenger for Dissolved Gas Analysis in Transformer Oil

Using Field-Effect Gas Sensors for Monitoring H2 in Transformer Oil

Contact Info

Product

Resources

About

Using Field-Effect Gas Sensors for Monitoring H₂ in Transformer Oil