Adsorption of C2H2, CH4 and CO on Mn-doped graphene: Atomic, electronic, and gas-sensing properties

Gui, Yingang; Xiao, Pan; Li, Kai; Ding, Zhuyu

doi:10.1016/j.physe.2020.113959

Cited by 107 publications

(35 citation statements)

References 30 publications

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“…Gui et al found that Co-doped TiO 2 further enhanced gas adsorption capacity and exhibited a superior adsorption ability and conductivity change toward C 2 H 4 molecules [40]. Consistent with this study, Mndoped graphene also exhibited enhanced conductivity and superior capability of C 2 H 2 and CO detection than pristine graphene [41]. The above research indicates that the TiO 2 nanotubes prepared in our experiment have a potential application in the field of monitoring the operative state of a transformer.…”

Section: Discussionsupporting

confidence: 88%

“…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 – 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%

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

et al. 2020

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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.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

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

et al. 2020

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“…Generally, E ads \ 0, the adsorption process corresponds to an exothermic process, indicating that the adsorption reaction can be spontaneous. The larger the absolute value of E ads symbolizes that the stronger effect between gases and the crystal surface in the adsorption reaction, and the adsorption structure is more stable [39]. In order to explore the effect of adsorption of different gases on the conductivity of MoS 2 crystal surface, the change value of the charge amount of gas molecules before and after the adsorption reaction needs to be calculated.…”

Section: Adsorption Properties and Geometric Structure Of Au-mos 2 /Gases Adsorption Systemmentioning

confidence: 99%

First-principles calculations of adsorption sensitivity of Au-doped MoS2 gas sensor to main characteristic gases in oil

Jiang

et al. 2021

J Mater Sci

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Detecting oil-dissolved gases in transformer is crucial for internal discharge fault diagnosis. Methane (CH 4 ), acetylene (C 2 H 2 ), ethylene (C 2 H 4 ), ethane (C 2 H 6 ) are some of the important fault characteristic gases in oil-immersed transformer discharge faults. The concentration and production rate can effectively reflect the insulation performance of oil-paper power transformer. In order to realize the effective detection of gases in the oil, the Au atom-doped MoS 2 (Au-MoS 2 ) monolayer was proposed. To study adsorption properties of different gases, the density functional theory (DFT) was used to study applicability of Au-MoS 2 two-dimensional (2D) nanomaterials for gas sensor. Meanwhile, the adsorption properties, sensitivity and electronic behavior were calculated. The results show that the doped systems have a better sensing performance for C 2 H 2 , C 2 H 4 and C 2 H 6 . And Au-MoS 2 monolayer has a unique response to C 2 H 2 with appropriate adsorption energy (-1.056 eV) and charge transfer (0.252 e), which are far more than CH 4 (-0.065 eV, 0.037 e). Based on the above data, Au-MoS 2 monolayer has selectivity for different oil-dissolved gases.

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“…Thus, 555-777 graphene has a more stable electronic structure compared with other defective structures. Previous studies showed that doping transition metal elements on graphene surface can improve its electrical conductivity and enhance its capacity to adsorb gas molecules [26][27][28][29][30]. Liu et al calculated the adsorption of SF 6 decompositions on Pd (111) surface and found that Pd (111) would have great adsorption capacity on absorbing those products.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Properties of Pd3-Modified Double-Vacancy Defect Graphene toward SF6 Decomposition Products

Pang

Cai

et al. 2020

Sensors

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In this study, we investigate Pd3-cluster-modified 555–777 graphene (Pd3-graphene) as a novel resistor-type gas sensor to detect SF6 decomposition products based on density functional theory calculations. We obtained and minutely analyzed the relevant parameters of each most stable adsorption configuration to explore the microscopic mechanism during gas adsorption. Theoretical results reveal that Pd3-graphene shows great adsorption capacity and sensitivity toward those decompositions. High adsorption energies and abundant charge transfer amounts could guarantee a stable adsorption structure of decomposition gases on Pd3-graphene surface. The complex change of density of states verifies a strong chemical reaction between the gases and the surface. Moreover, the conductivity of Pd3-graphene would improve due to the decrease of energy gap, and the sensitivity was calculated as SOF2 > H2S > SO2 > SO2 F2. This work provides an effective method to evaluate the operation status of SF6 gas-insulated equipment.

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Adsorption of C2H2, CH4 and CO on Mn-doped graphene: Atomic, electronic, and gas-sensing properties

Cited by 107 publications

References 30 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 calculations of adsorption sensitivity of Au-doped MoS2 gas sensor to main characteristic gases in oil

Adsorption Properties of Pd3-Modified Double-Vacancy Defect Graphene toward SF6 Decomposition Products

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