Development of Characterization and Analysis Methods for Graphene Modified Coatings for Tubing

2019 ◽  
Vol 944 ◽  
pp. 923-929 ◽  
Author(s):  
Ya Qiong Cao ◽  
Chun Feng ◽  
Li Juan Zhu ◽  
Rui Zhe Li
Keyword(s):  
Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Structure Characterization ◽  
Corrosion Mechanism ◽  
Corrosion Condition ◽  
Anticorrosive Coating ◽  
X Ray ◽  
Graphene Coating ◽  
And Performance

With the further deterioration of the oil and gas exploitation environment, the corrosion of tubing becomes an intractable problem. Therefore, choosing suitable anticorrosive coating is of great significance to the safe operation life of tubing and reduce economic cost. Effect addition of appropriate graphene in coatings can significantly improve its corrosion resistance of the coating. However, most of the applied research are focus on marine heavy corrosion condition; the relationship between the corrosion mechanism and performance of graphene coating for tubing is not clear, probably due to difficulty in the characterization of the organizational structure characterization of the graphene modified coating. In the present work, Typical methods of the graphene coating characterization: Scanning Electron Microscope (SEM) with EDS, Transmission Electron Microscope (TEM), Atomic Force Microscope (AFM), X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) will be introduced, and the application prospect of the coating will be discussed. It indicated that the single characteristic method cannot analysis the structure and morphology information of graphene anticorrosion coating comprehensively. Flexibly use of a variety of characterization methods to study the anticorrosion mechanism and performance of the graphene modified coating for tubing is a better choice. The graphene modified anticorrosive coating for tubing is with the potential of wide applications.

Preparation of Carbon Nanofibers from Polyacrylonitrile Nanofibers by Electrospinning

2011 ◽  
Vol 415-417 ◽  
pp. 642-647
Author(s):  
En Zhong Li ◽  
Da Xiang Yang ◽  
Wei Ling Guo ◽  
Hai Dou Wang ◽  
Bin Shi Xu
Keyword(s):  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Photoelectron Spectroscopy ◽  
Solution Concentration ◽  
Dimethyl Formamide ◽  
Ultrafine Fibers ◽  
X Ray ◽  
Scanning Electron ◽  
Pan Fibers

Ultrafine fibers were electrospun from polyacrylonitrile (PAN)/N,N-dimethyl formamide (DMF) solution as a precursor of carbon nanofibers. The effects of solution concentration, applied voltage and flow rate on preparation and morphologies of electrospun PAN fibers were investigated. Morphologies of the green fibers, stabilized fibers and carbonized fibers were compared by scanning electron microscope (SEM). The diameter of PAN nanofibers is about 450nm and the distribution of diameter is well-proportioned. Characterization of the elements changes of fibers were performed by X-ray photoelectron spectroscopy (XPS).

Preparation and Performance Characterization of “Turnjujube-Like” CdSe Nanofibers

2014 ◽  
Vol 971-973 ◽  
pp. 123-126
Author(s):  
Yong Ping Luo ◽  
Zong Hu Xiao ◽  
Shun Jian Xu ◽  
Wei Zhong ◽  
Huan Wen Wu ◽  
...  
Keyword(s):  
Structure Characterization ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
Cubic Crystal ◽  
X Ray ◽  
Zinc Blende ◽  
And Performance ◽  
First Time

It was reported for the first time that “Turnjujube-like” CdSe nanofibers have been assembled onto TiO2surface by electrochemical method of cyclic voltammetry, using CdSO4•8H2O and SeO2as raw material, can be used as a sensitizer of quantum dot-sensitized solar cell. CdSe morphology, structure characterization and optical properties are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and ultraviolt-visible spectroscopy (UV–Vis), respectively. The experimental results show that the prepared “Turnjujube–like” CdSe nanofibers are zinc blende CdSe with cubic crystal system, and it have excellent light absorption within the wavelength range of 300–800 nm. It has a potential for the construction of QD-sensitized solar energy cell.

CHARACTERIZATION OF TALC/TiO2 COMPOSITE PARTICLE MATERIAL PREPARED BY MECHANO-CHEMICAL METHOD

2020 ◽  
pp. 2050047
Author(s):  
YU LIANG ◽  
WEIHUA AO ◽  
HAO DING ◽  
KAI SHEN
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Chemical Method ◽  
Composite Particle ◽  
Composite Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Talc/TiO2 composite particle was prepared with TiO2 coating on the surfaces of the talc particles by mechano-chemical method. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to investigate the microstructures and morphologies of the composite particles. The mechanism of the mechano-chemical reaction was researched by infrared spectra (IR) and X-ray photoelectron spectroscopy (XPS). The prepared talc/TiO2 composite particle has similar pigment properties compared with TiO2, with its hiding power 10.45[Formula: see text]g/cm3 and whiteness 97.49%. The results show that TiO2 coated evenly on the surfaces of the talc particles by Si–O–Ti and Mg–O–Ti bonds through surface dehydroxylation reaction.

Preparation and Characterization of BCN–TiO2 Nanoparticles

2011 ◽  
Vol 306-307 ◽  
pp. 1375-1378 ◽  
Author(s):  
Ling Zhang ◽  
Ling Li ◽  
Zong Gang Mou ◽  
Xi Feng Li
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Crystal Lattice ◽  
Photoelectron Spectroscopy ◽  
Crystal Size ◽  
Annealing Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

BCN–TiO2 was prepared by doping Ti(OH)4 with graphite-like structure BCN in an annealing process at 400[°C] for 2[h]. The catalyst samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). Graphite-like structure BCN was detected by XRD. The results showed that with graphite-like structure BCN doped in, the crystal size became smaller than pure TiO2. Also B, C, N were detected in crystal lattice of TiO2, in which Boron was in the form of Bx+, Carbon substituted some of the lattice oxygen atoms as Ti-C, and Nitrogen was in the form of Ti-N and Ti-O-N.

The Growth and Characterization of Germanium-Carbon Alloy Thin Films

1992 ◽  
Vol 270 ◽  
Author(s):  
Haojie Yuan ◽  
R. Stanley Williams
Keyword(s):  
Thin Films ◽  
Photoelectron Spectroscopy ◽  
Vacuum Chamber ◽  
Optical Band Gap ◽  
High Vacuum ◽  
Optical Absorption Spectroscopy ◽  
Alloy Thin Film ◽  
New Materials ◽  
X Ray

ABSTRACTThin films of pure germanium-carbon alloys (GexC1−x with x ≈ 0.0, 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) have been grown on Si(100) and A12O3 (0001) substrates by pulsed laser ablation in a high vacuum chamber. The films were analyzed by x-ray θ-2θ diffraction (XRD), x-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), conductivity measurements and optical absorption spectroscopy. The analyses of these new materials showed that films of all compositions were amorphous, free of contamination and uniform in composition. By changing the film composition, the optical band gap of these semiconducting films was varied from 0.00eV to 0.85eV for x = 0.0 to 1.0 respectively. According to the AES results, the carbon atoms in the Ge-C alloy thin film samples has a bonding configuration that is a mixture of sp2 and sp3 hybridizations.

Monitoring and characterization of creation of geopolymers prepared from fly ash and metakaolin by X-ray photoelectron spectroscopy method

2014 ◽  
Vol 34 (3) ◽  
pp. 841-849 ◽  
Author(s):  
M. Kanuchova ◽  
L. Kozakova ◽  
M. Drabova ◽  
M. Sisol ◽  
A. Estokova ◽  
...  
Keyword(s):  
Fly Ash ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Method ◽  
X Ray

Characterization of columns grown during KrF laser micromachining of Al2O3–TiC ceramics

2003 ◽  
Vol 18 (5) ◽  
pp. 1123-1130 ◽  
Author(s):  
V. Oliveira ◽  
R. Vilar
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Laser Pulses ◽  
Formation Mechanisms ◽  
X Ray ◽  
Reducing Conditions ◽  
Transmission Electron ◽  
Column Formation ◽  
Krf Laser

This paper aims to contribute to the understanding of column formation mechanisms in Al2O3–TiC ceramics micromachined using excimer lasers. Chemical and structural characterization of columns grown in Al2O3–TiC composite processed with 200 KrF laser pulses at 10 J/cm2 was carried out by scanning electron microscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, and x-ray diffraction analysis. Fully developed columns consist of a core of unprocessed material surrounded by an outer layer of Al2TiO5, formed in oxidizing conditions, and an inner layer, formed in reducing conditions, composed of TiC and Al3Ti or an AlTi solid solution. Possible mechanisms of column formation are discussed.

scholarly journals Preparation and Characterization of Visible-Light-Activated Fe-N Co-Doped TiO2and Its Photocatalytic Inactivation Effect on Leukemia Tumors

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Kangqiang Huang ◽  
Li Chen ◽  
Jianwen Xiong ◽  
Meixiang Liao
Keyword(s):  
Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Light Therapy ◽  
Cell Counting ◽  
Visible Absorption ◽  
X Ray ◽  
Photocatalytic Inactivation ◽  
Inactivation Efficiency ◽  
Co Doped

The Fe-N co-doped TiO2nanocomposites were synthesized by a sol-gel method and characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), ultraviolet-visible absorption spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS). Then the photocatalytic inactivation of Fe-N-doped TiO2on leukemia tumors was investigated by using Cell Counting Kit-8 (CCK-8) assay. Additionally, the ultrastructural morphology and apoptotic percentage of treated cells were also studied. The experimental results showed that the growth of leukemic HL60 cells was significantly inhibited in groups treated with TiO2nanoparticles and the photocatalytic activity of Fe-N-TiO2was significantly higher than that of Fe-TiO2and N-TiO2, indicating that the photocatalytic efficiency could be effectively enhanced by the modification of Fe-N. Furthermore, when 2 wt% Fe-N-TiO2nanocomposites at a final concentration of 200 μg/mL were used, the inactivation efficiency of 78.5% was achieved after 30-minute light therapy.

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