High Sensitivity Electrochemical Multisensors based on Graphene-PANI Nanocomposite for Simultaneous Detection of Glucose and Urea

We present a study of the effect of graphene–PANI nanocomposites on the sensitivity of the urea and glucose multisensory. We used an electroctrochemical multisensor based on two electrodes located in a reservoir with two separate channels. The urease and glu-cose oxidase (GOD) were employed for detecting the urea and glucose, respectively. We characterized the graphene and graphene-PANI samples with X-ray Diffraction (XRD) analysis and scanning electron microscopy (SEM) observations. We further performed the Cyclic voltammetry and Amperometry tests. The collected experimental results revealed that the intensity of the peak significantly increases with the concentration of the urea and glucose.

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Interaction between Yttria Fully Stabilized Zirconia or Yttria-Zirconia Blended Face-Coat with Ti6Al4V during Investment Casting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1019.302 ◽

2014 ◽

Vol 1019 ◽

pp. 302-310 ◽

Cited By ~ 1

Author(s):

Kalenda Mutombo ◽

Christina Kgomo ◽

P. Rossouw

Keyword(s):

Electron Microscopy ◽

Xrd Analysis ◽

Experimental Results ◽

X Ray Diffraction ◽

Stabilized Zirconia ◽

X Ray ◽

Hardness Tester ◽

Alpha Case ◽

Face Coat ◽

Scanning Electron

The interaction between the Ti6Al4V alloy and the mould materials was investigated. The alpha-case was characterized by Vickers hardness tester, optical and scanning electron microscopy equipped with electron dispersive X-ray spectrometry (EDX). X-ray diffraction (XRD) analysis was performed on as cast and on YFSZ or YZ-Blended face-coats. From the experimental results, a distinct alpha-case formation was revealed. The YFSZ led to a thicker and harder alpha-case than the YZ-Blended face-coat. The EDX revealed the presence of Zr and Si elements in both alpha-cases. Therefore, from experimental results and thermodynamic calculations, pure ZrO2and SiO2may react with Ti.

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Influence of Silica Fume/Nanosilica on the Strength and Microstructure of Phosphoaluminate Cement

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.1447 ◽

2011 ◽

Vol 291-294 ◽

pp. 1447-1449

Author(s):

Chen Jing Lv ◽

Shu Xia Ren ◽

Xiu Shu Tian

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Silica Fume ◽

Experimental Results ◽

X Ray Diffraction ◽

Hydration Time ◽

X Ray ◽

Hydration Rate ◽

Splitting Strength ◽

Scanning Electron

The influence of Silica fume/Nanosilica on the Performance of phosphoaluminate cement was studied in the paper. The microstructure and morphology was determined by X-ray diffraction and scanning electron microscopy. The experimental results show that the phosphoaluminate cement with 4% of added Silica fume/Nanosilica(1:1) by weight of cement has an optimum splitting strength, in which the increase of splitting strength are about 15.1%,11.8% and 24.6% at 3days,7days and 28 days. The reason for causing the above results are the hydration rate and the amount of the hydrates of PALC with 4% Silica fume/Nanosilica have been increased significantly at different hydration time because of the role played by Silica fume and Nanosilica together.

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Growth Mechanism and Characterization of Porous CuS Microspheres

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.568.348 ◽

2012 ◽

Vol 568 ◽

pp. 348-351

Author(s):

Shuang Xu ◽

Nuan Song ◽

Chang Li Qiu ◽

Yao Ping Zhang ◽

Jian Feng Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Transmission Electron Microscopy ◽

Growth Mechanism ◽

Experimental Results ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

In this paper, a facile method was presented to fabricate CuS porous microspheres, which were formed by the intergrowth of CuS polycrystalline nanoslices. The obtained sample has been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electronic diffraction (SAED), and scanning electron microscopy (SEM). On the basis of the experimental results, we proposed a self-assemble mechanism to elucidate the formation of CuS nanoslice structure.

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Electrochemistry, Electrodeposition, and Photoluminescence of Eu (III)/Lanthanides (III) on Terpyridine-Functionalized Ti Nanospikes

Metals ◽

10.3390/met11060977 ◽

2021 ◽

Vol 11 (6) ◽

pp. 977

Author(s):

Min Hee Joo ◽

So Jeong Park ◽

Hye Ji Jang ◽

Sung-Min Hong ◽

Choong Kyun Rhee ◽

...

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Cyclic Voltammetry ◽

Photoelectron Spectroscopy ◽

Oxidation States ◽

Complex Structures ◽

X Ray Diffraction ◽

Decay Kinetics ◽

X Ray ◽

Scanning Electron

Terpyridine-functionalized Ti nanospike electrodes (TiNS-SiTpy) were developed and applied to cyclic voltammetry and amperometry of Ln (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) ions and mixed Eu (III) + Ln (III) ions in a 0.1 M NaClO4 electrolyte. Electrodeposition was successfully performed over TiNS-SiTpy electrodes, which were fully examined by scanning electron microscopy, X-ray diffraction crystallography, Fourier-transform infrared spectroscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, photoluminescence (PL), and PL decay kinetics. The Gd and Tb ions were found to increase PL intensities with 10× longer lifetimes of 1.32 μs and 1.03 μs, respectively, compared with that of the electrodeposited Eu sample. The crystal phase and the oxidation states were fully examined for the mixed Ln (Eu + Gd and Eu + Tb) complex structures.

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Comparison of Mechanical Properties and Microstructure of Annealed and Quenched Ti-Nb Alloys

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.769.29 ◽

2018 ◽

Vol 769 ◽

pp. 29-34 ◽

Cited By ~ 3

Author(s):

Alexander Thoemmes ◽

Ivan V. Ivanov ◽

Adelya A. Kashimbetova

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Scanning Electron Microscopy ◽

Xrd Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Β Phase ◽

Α Phase ◽

Nb Content ◽

Scanning Electron

The effect of Nb content on microstructure, mechanical properties and phase formation in annealed and quenched binary Ti-Nb alloys were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis. The content of Nb varied in the range 0-37 mass % leading to significant changes in the microstructure. The annealed and furnace-cooled binary Ti-Nb samples exhibited HCP martensitic α` phase at a Nb content below 14 mass % and stable BCC β phase at higher contents of Nb. The structure of the quenched samples changed with increase of Nb content in the following order: coarse primary martensite → fine acicular (α`+α``) martensite → single β phase structure. The mechanical properties of alloys strongly depended on the Nb content and type of the dominating phase.

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PENGARUH KONSENTRASI KOH TERHADAP SIFAT FISIS DAN ELEKTROKIMIA ELEKTRODA KARBON DARI LIMBAH KULIT DURIAN SEBAGAI SEL SUPERKAPASITOR

Komunikasi Fisika Indonesia ◽

10.31258/jkfi.15.1.62-66 ◽

2018 ◽

Vol 15 (1) ◽

pp. 62

Author(s):

Pandi Kurniawan ◽

Erman Taer ◽

Usman Malik ◽

Rika Taslim

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Cyclic Voltammetry ◽

Chemical Activation ◽

Activation Process ◽

X Ray Diffraction ◽

X Ray ◽

Carbonization Process ◽

Cell Capacitance ◽

Scanning Electron

Activated carbon electrode have been prepare from durian shell focused in KOH concentration variations at chemical activation process. The preparation of carbon electrodes begins with pre-carbonization process, grinding using Hard Grinder and ball milling, after that followed by sieving process with particle size at range of 39 - 52 μm. Chemical activation was performed by using KOH activator agent with concentration variation of 0.5 M, 0.6 M, 0.7 M. Carbon powder are formed to pellet form using Hydraulic Press at a 8 ton compression pressure. The carbonization process is carried out a temperature of 600°C in the N2 gas atmosphere at a temperature of 900°C for 2 hours. The electrodes characterization are performed to determine the physical and electrochemical properties.The physical properties such as density, degree of cristanility, surface morfology was analyzed by calculate the electrode dimension such as, mass, thickness and diameter, X-ray diffraction analysis and Scanning Electron Microscopy Analysis. the electrochemical properties was studied the cell capacitance and the electrode capacitance specific using Cyclic Voltammetry method. the electrode density were decrease with the increasing the KOH concentration. The smallest density has been found at electrode using a KOH concentration of 0.7 M. The XRD test showed a carbon was amorfphuse structure identified by existing two broadening peaks at an angle of 2θ, ie 24.967°, 44.315° and 81.332° which describes the (002), (100) and (112) planes. Furthermore, samples were analyzed by Scanning Electron Microscopy and X-ray diffraction. The cyclic voltammetry result, obtained the highest specific capacitance of 89.05 F/g and cell capacitance 24,04 F was found at electrode with a KOH concentration of 0.7 M. From this research it can be concluded that the KOH optimum concentration was 0.7 M.

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Fabrication of Highly Ordered Arrays of TiO2 Nanotubes on Ti Wires

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.624.63 ◽

2012 ◽

Vol 624 ◽

pp. 63-66

Author(s):

Ming Ya Li ◽

Jian Min Wang ◽

Jing Guo ◽

Yue Liu Li ◽

Xiao Qiang Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Xrd Analysis ◽

Internal Diameter ◽

Outer Diameter ◽

X Ray Diffraction ◽

X Ray ◽

Ordered Arrays ◽

Glycol Solution ◽

Scanning Electron

Highly Ordered arrays of TiO2 nanotubes on Ti wire were prepared by anodic oxidation with ethylene glycol solution of NH4F electrolyte. The phase compositions of the samples were characterized using X-ray diffraction (XRD) analysis using Cu-Kα radiation. The microstructure was observed using scanning electron microscopy (SEM). Experimental results show that at the anode condition of 95V, 50°C, and then themal treatment at 550°C, the highly ordered anatase TiO2 nanotubes arrays arranged on the surface of Ti wire. The length of the nanotube achieved was about 31μm, the internal diameter and outer diameter of the nanotube was 127nm and 170nm, respectively.

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Higher Photocatalytic Activity of P-Incorporated TiO2 Nanotube Arrays

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1087.452 ◽

2015 ◽

Vol 1087 ◽

pp. 452-456

Author(s):

Khairul Arifah Saharudin ◽

Srimala Sreekantan

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Degradation Rate ◽

Oxygen Vacancies ◽

Xrd Analysis ◽

Nanotube Arrays ◽

Photoluminescence Spectra ◽

X Ray Diffraction ◽

X Ray ◽

Scanning Electron

TiO2 nanotubes arrays were prepared by anodization of Ti in EG containing H3PO4 and NH4F electrolyte. The samples were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDX) and photoluminescence spectra (PL). The as-anodized TiO2 nanotubes were annealed in inert (argon), reducing (nitrogen), or oxidizing (oxygen) atmosphere at 400 °C for 4 hr. XRD analysis revealed that the TiO2 nanotubes were anatase after annealing. In this study, the TiO2 nanotubes annealed in argon exhibited the highest degradation rate of methyl orange (MO) solution under ultraviolet irradiation among the samples. The degradation rate was approximately 98% after 5h, which may be ascribed to the large amount of oxygen vacancies and defects (phosphorus) within the Ar - TiO2 sample that simultaneously increased the degradation rate of MO.

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Effect of KOH Activator on the Performance of Activated Carbon from Oil Palm Kernel Shell as Supercapacitor Electrode Material

Journal of Aceh Physics Society ◽

10.24815/jacps.v9i1.15195 ◽

2020 ◽

Vol 9 (1) ◽

pp. 13-19 ◽

Cited By ~ 2

Author(s):

Yola Azli Perdana ◽

Rahma Joni ◽

Emriadi Emriadi ◽

Hemansyah Aziz

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Cyclic Voltammetry ◽

Activated Carbon ◽

Surface Area ◽

Palm Kernel ◽

X Ray Diffraction ◽

X Ray ◽

Palm Kernel Shell ◽

Scanning Electron

Karbon aktif dari cangkang kelapa sawit sebagai bahan elektroda superkapasitor telah diteliti. Superkapasitor dirangkai dengan metoda plat/sandwich yang dipisahkan oleh separator. Untuk mendapatkan nilai kapasitansi yang besar dilakukan variasi jumlah aktivator terhadap karbon menggunakan aktivator KOH. Sifat fisikokimia dari karbon aktif diteliti dengan melakukan karakterisasi menggunakan XRD (X-Ray Diffraction), SEM-EDX (Scanning Electron Microscopy-Energy Dispersive X-Ray) dan SAA (Surface Area Analyzer) dan sifat elektrokimianya diteliti dengan pengukuran CV (Cyclic Voltammetry). Karbon aktif dengan perbandingan 1:5 memiliki luas permukaan yang paling besar yaitu 793,326 m2/g dan nilai kapasitansi spesifik tertinggi yaitu 99,151 F/g. The activated carbon from oil palm kernel shell as an electrode material for supercapacitors has been investigated. The supercapasitor was assembled by plate/sandwich methods. Both electrodes were separated by using a separator. To increase the capacitancy value, variations in the number of activators on carbon were carried out using KOH activator. The physicochemical properties of activated carbon were investigated by characterizing using XRD (X-Ray Diffraction), SEM-EDX (Scanning Electron Microscopy-Energy Dispersive X-Ray) and SAA (Surface Area Analyzer) and the electrochemical properties were investigated by measuring CV (Cyclic Voltammetry). Activated carbon with a ratio of 1:5 has the largest surface area of 793,326 m2/g and the highest specific capacitance value is 99,151 F/g.Keywords: activated carbon, supercapasitor, activator, surface area, specific capacitance

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SYNTHESIS AND DIELECTRIC PROPERTIES OF FOUR-LAYERED AURIVILLIUS SrBi4Ti4O15 DOPED Nd3+ AND Mn4+

ALCHEMY Jurnal Penelitian Kimia ◽

10.20961/alchemy.11.2.714.127-134 ◽

2016 ◽

Vol 11 (2) ◽

pp. 127

Author(s):

Sestry Misfadhila ◽

Evi Adhelina ◽

Yestria Rilda ◽

Syukri Arief ◽

Zulhadjri Zulhadjri

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Dielectric Constant ◽

Xrd Analysis ◽

Orthorhombic Symmetry ◽

Molten Salt Method ◽

X Ray Diffraction ◽

Aurivillius Phase ◽

X Ray ◽

Scanning Electron

Synthesis of four-layered Aurivillius compound doped with Nd3+ and Mn4+ cations, SrBi3.5Nd0.5Ti4-xMnxO15 (x = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na2SO4/K2SO4 as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by Le Bail technique. The results of XRD analysis show that the four-layered Aurivillius compound formed, however there are additional peaks identified as perovskite and Bi7.68Ti0.32O12.16 phases for x = 0 and perovskite and Sr4Ti3O10phases for x = 0.5 and 1. The results of refinement show that four-layered Aurivillius phase formed has orthorhombic symmetry with A21am space group. Scanning Electron Microscopy (SEM) shows the plate like morphology that are characteristic of Aurivillius compound. Dielectric constant of the samples show increasing value as increasing of Mn4+ concentration.

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