Preparation and Characterization of Light-Color Conductive Composite Based on Talc

2011 ◽  
Vol 399-401 ◽  
pp. 1030-1033
Author(s):  
Zi Xian Xu ◽  
Feng Zhu Lv ◽  
Xue Feng ◽  
Yi He Zhang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Matrix Effects ◽  
Ph Value ◽  
Chemical Deposition ◽  
X Ray Diffraction ◽  
Conductive Composite ◽  
X Ray ◽  
Hydrolysis Temperature ◽  
Chemical Deposition Method ◽  
Light Color

As additive, economic and low resistivity material was useful in the fields of electrostatic prevention and electromagnetism screening. Antimony-doped tin oxide(Sb:SnO2)/talc composite was prepared for this purpose via a modified chemical deposition method using economic and natural talc as matrix. Effects of hydrolysis temperature, pH value, doping concentration of antimony, proportion of Sb:SnO2 to talc, calcination temperature and time on the resistivity of the composite powder were investigated. The construction of Sb:SnO2/talc conductive composite was characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The resistivity of Sb:SnO2/talc composite prepared at the optimum conditions decreased to 3.0×103 Ω•cm, at the same time its whiteness was greatly improved.

scholarly journals A Polypyrrole-Modified Pd-Ag Bimetallic Electrode for the Electrocatalytic Reduction of 4-Chlorophenol

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 931
Author(s):  
Xuefeng Wei ◽  
Laiyuan Zeng ◽  
Weiwei Lu ◽  
Juan Miao ◽  
Ruichang Zhang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ph Value ◽  
Chemical Deposition ◽  
Electrocatalytic Reduction ◽  
Optimum Conditions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Initial Ph ◽  
Chemical Deposition Method ◽  
Promising Application

A polypyrrole-modified bimetallic electrode composed of Pd-Ag on a Ti substrate (Pd-Ag/PPY/Ti) was successfully prepared via a chemical deposition method, and was applied to the electrocatalytic hydrodechlorination of 4-chlorophenol (4-CP) in aqueous solution. The electrode was characterized by cyclic voltammetry (CV), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Various influences on the dechlorination efficiency of 4-chlorophenol, including applied current, initial pH value, and temperature, were studied. The dechlorination efficiency of 4-CP reached 94% within 120 min under the optimum conditions, i.e., a dechlorination current of 6 mA, an initial pH of 2.30, and a temperature of 303 K. The apparent activation energy of the dechlorination of 4-CP by the Pd-Ag/PPY/Ti electrode was calculated to be 49.6 kJ/mol. The equivalent conversion rate constant kPd was 0.63 L.gPd−1·min−1, which was higher than the findings presented in comparable literature. Thus, a highly effective bimetallic electrode with promising application prospects and low Pd loading was fabricated.

Influence of pH on the Morphology and Luminescence Properties of Europium-Doped Hydroxyapatite Nanoparticles

2011 ◽  
Vol 391-392 ◽  
pp. 1132-1137
Author(s):  
Su Ping Huang ◽  
Jun Zhu ◽  
Ke Chao Zhou
Keyword(s):  
Photoelectron Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Doping Concentration ◽  
Ph Value ◽  
Luminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Ph Values ◽  
Influence Of Ph

Luminescence behaviors and morphology of Eu3+doped hydroxyapatite synthesized under different pH values were well investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Inductively Coupled Plasma (ICP) (ICP–PLASMA 1000), and photoluminescence (PL) spectroscopy. Results revealed that With pH values increased from 6.5 to 10.0, the morphology of nano-Eu:HA particles changes from rod particles to equiaxed particles. The actual doping concentration and aspect ratio of Eu3+-doped HA decreased with the increasing of pH value. At the same time, the fluorescence intensity also tends to weakly lower with the increasing of pH value, which indicated that the luminescence properties mainly depended on the actual Eu3+doping concentration, the influences of morphology on the luminescence properties were slight.

Photoelectrocatalytic Degradation of HCB by N-Doped TiO2 Nanotube Arrays

2013 ◽  
Vol 652-654 ◽  
pp. 1580-1584
Author(s):  
Yu Jiang Guan ◽  
Zi Bo Wang ◽  
Shu Li Bai ◽  
Qin Xue
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ph Value ◽  
Nanotube Arrays ◽  
Simulated Sunlight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photoelectrocatalytic Degradation ◽  
Doping Behavior ◽  
Doped Titanium Dioxide ◽  
Scanning Electron

N-doped Titanium dioxide (TiO2) nanotube arrays were characterized by scanning electron microscope (SEM)，X-ray Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to analyse its surface morphology, crystal types and the doping behavior of nitrogen. The material was used as electrode for photoelectrocatalytic degradation of hexachlorobenzen under irradiation of simulated sunlight. The effects of photocatalysis, electrocatalysis, photoelectrocatalysis, the concentration of Na2SO4 and pH value on degradation of HCB were investigated.

scholarly journals Degradation of Acid Red B by Manganese doped iron oxychloride and Permonosulfate: Performance and Inhomogeneous Activation Mechanism

2021 ◽  
Author(s):  
Rong Chen ◽  
Dan Zhao ◽  
Yanmao Dong ◽  
Chengrun Cai ◽  
Yan Yuan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Ph Value ◽  
Active Species ◽  
Ion Concentration ◽  
Activation Mechanism ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Initial Ph

Abstract manganese doped iron oxychloride (Mn-FeOCl) was synthesized by partial pyrolysis method. The Mn-FeOCl was used as heterogeneous catalyst to activate permonosulfate (PMS) for the degradation of azo dye acid red B(ARB) for the first time. The Mn-FeOCl was characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction spectroscopy (XRD). The effects of Mn-FeOCl dosage, PMS concentration, initial pH value, Cl ion concentration and humic acid (HA) dosage on the degradation of ARB by Mn-FeOCl/PMS were investigated. Results showed that the ARB was degraded effectively by Mn-FeOCl/PMS. The mineralization rate of ARB reached 42.5%. As the Mn-FeOCl dosage was 0.1g/L, PMS concentration was 1mmol/L, and ARB concentration was 0.05mmol/L, the degradation rate of ARB reached 99.4% in 30 minutes. With the increase of PMS dosage, Mn-FeOCl dosage, Cl− ion concentration and initial pH value, the decolorization effect of ARB increased. The reaction mechanism was analyzed by free radical quenching experiment and XPS. The main active species were determined as ·OH and SO4·− which generated by PMS activation. The SO4·−−was the main active species.

Chemical Deposition Method for Synthesis of Pt-TiO2 Composite Nanotubes with Photoelectrochemical Activity

2012 ◽  
Vol 465 ◽  
pp. 276-282
Author(s):  
Zhong Hui Gao ◽  
Zhen Duo Cui ◽  
Xian Jin Yang
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Chemical Deposition ◽  
Pt Nanoparticles ◽  
High Density ◽  
Deposition Method ◽  
Photoelectrochemical Activity ◽  
X Ray ◽  
Transmission Electron ◽  
Chemical Deposition Method

Pt nanoparticles were successfully assembled in self-organized TiO2 nanotubes by a chemical deposition method. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were used for characterizing the surface morphology and phase composition. Photocurrent response activity was measured. Different morphology of Pt-TiO2 NTs exhibited different photocurrent generation efficiency. High density Pt nanoparticles depositing on TiO2 NTs decreased the photocurrent of Pt-TiO2 electrodes. It was because the high density Pt nanoparticles could become the recombination centers of photoelectrons and holes.

scholarly journals Preparation of Copper Sulfide Deposition on Modified Poly(Ethylene Terephtalate) Fibres with Good Conductivity

2018 ◽  
Vol 26 (1(127)) ◽  
pp. 25-29 ◽  
Author(s):  
Iwona Frydrych ◽  
Xie Juan
Keyword(s):  
Copper Sulfide ◽  
Surface Resistance ◽  
Copper Ions ◽  
Chemical Deposition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermal Gravimetry ◽  
Chemical Deposition Method ◽  
Crosslinked Chitosan ◽  
Poly Ethylene

The immobilization of CuS on the surface of poly (ethylene terephtalate) (PET) fibres was carried out by the functionalization of PET fibres with chitosan (CS), followed by the chemical deposition method. Crosslinked chitosan with NH2 functionality was used as a chelator to absorb copper ions, which can successfully initiate CuS deposition in the following chemical deposition stage. The CuS-loaded fibres were characterised by scanning electron microscopy, X-ray diffraction, infrared spectroscopy and thermal gravimetry, respectively. The properties of tensile and conductivity were also investigated. The lowest surface resistance 42 Ω/cm of the treated PET fibres was obtained when the CS concentration was 1.0%.

Synthesis of the rod-like NiS2@C for hydrogen evolution reaction in acidic solution

2020 ◽  
Vol 13 (02) ◽  
pp. 2050009
Author(s):  
Xiujuan Wu ◽  
Jie Wang ◽  
Fan Zhang ◽  
Junyan Gong ◽  
Pinghao Xu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Evolution ◽  
Photoelectron Spectroscopy ◽  
Acidic Solution ◽  
Carbon Film ◽  
Chemical Deposition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Onset Potential ◽  
Transmission Electron

The carbon-based NiS2 nanorods (NiS2@C) were prepared by chemical deposition and sulfidation with nickel dimethylglyoximate (Ni(DMG)2) as the starting agent. The nanorods were analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy for chemical analysis. Structural characterization revealed that NiS2 existed on the surface of the rod and in the internal channels of the rod. In 0.5[Formula: see text]m H2SO4 solution, NiS2@C has lower onset potential and higher current density than NiS2. The results suggest that C improves the electrical conductivity of the NiS2 electrocatalyst, and the carbon film-based rod-like NiS2 is a more effective nanocomposite of hydrogen evolution.

scholarly journals Adsorption characteristics of ciprofloxacin on the schorl: kinetics, thermodynamics, effect of metal ion and mechanisms

2017 ◽  
Vol 8 (3) ◽  
pp. 350-359 ◽  
Author(s):  
Danyang Yin ◽  
Zhengwen Xu ◽  
Jing Shi ◽  
Lili Shen ◽  
Zexiang He
Keyword(s):  
Photoelectron Spectroscopy ◽  
Metal Ion ◽  
Adsorption Process ◽  
Ph Value ◽  
Physical Adsorption ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Abstract In this study, schorl was used as an effective adsorbent for ciprofloxacin removal from wastewater. The adsorption performance, mechanism and effect of metal ion on sorption were investigated. Adsorption capacity reached a maximum (8.49 mg/g) when the pH value was 5.5. The pseudo-second-order kinetic model and Freundlich model could better describe the experimental data. The negative ΔH (–22.96 KJ/mol) value showed that the adsorption process was exothermic. The results also indicated physical adsorption existed on the adsorption process, which was in agreement with the analysis of X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy. The desorption rate could reach 94%, which suggested that schorl had a good desorption and regeneration performance. Coexisting ions, such as Cu2+ and Al3+, could obviously inhibit adsorption, and the inhibition from Al3+ was significantly higher than that from Cu2+. However, the additional Zn2+ could slightly promote the adsorption.

scholarly journals Activated mineral adsorbent for the efficient removal of Pb(II) and Cd(II) from aqueous solution: adsorption performance and mechanism studies

2020 ◽  
Vol 82 (9) ◽  
pp. 1896-1911
Author(s):  
Tao Zheng ◽  
Xiaohui Zhou ◽  
Jing Guo ◽  
Chubin Zhong ◽  
Yaochi Liu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Adsorption Process ◽  
Ph Value ◽  
Potassium Feldspar ◽  
X Ray Diffraction ◽  
Batch Mode ◽  
Factors Affecting ◽  
X Ray ◽  
Adsorption Performance ◽  
Adsorption Removal

Abstract Activated mineral adsorbent (AMA) was prepared via double salts (Na2SO4 and CaCO3) heat treatment activation of solid-state potassium feldspar. Adsorption performance of AMA for Cd(II) and Pb(II) was investigated by batch mode and factors affecting adsorption including pH value, initial concentration of adsorbate, contact time, adsorbent dosage and temperature on adsorption performance for Cd(II) and Pb(II) were studied. The results indicated that the adsorption process was pH dependent, endothermic and spontaneous. When the adsorption process of Cd(II) and Pb(II) on AMA reached equilibrium, the maximum saturated adsorption capacities were 263.16 and 303.03 mg/g for Cd(II) and Pb(II) ions, respectively, showing higher adsorption removal efficiency. The Langmuir adsorption isotherm and pseudo second kinetic equation could well fit the adsorption process of Cd(II) and Pb(II) by AMA. Besides, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques were also performed to further reveal the adsorption mechanism. The results indicated that ion exchange, precipitation and adsorption played an important role in adsorption process. From the investigation, it was concluded that AMA was an excellent adsorbent with the advantages of environment-friendly, inexpensive, facile preparation and higher adsorption capacity of toxic Cd(II) and Pb(II) ions.

Synthesis and Characterization of SrSiO3 by Chemical Deposition Method

2012 ◽  
Vol 204-208 ◽  
pp. 3952-3955 ◽  
Author(s):  
Zheng Quan Zhang ◽  
Yu Ling Wang ◽  
Xiao An Yue ◽  
En Ze Wang ◽  
Li Zhen Zou
Keyword(s):  
Phase Composition ◽  
Sintering Temperature ◽  
Chemical Deposition ◽  
Raw Material ◽  
Deposition Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Deposition Method ◽  
Strontium Silicate

Nitric acid strontium and potassium silicate as raw material, the strontium silicate was synthesized preparation the strontium silicate was synthesized by chemical deposition method， and the strontium silicate was sintered for three hours in 850 °C, 1000 °C and 1150 °C. The effect of sintering temperature on phase composition, microstructure and the influence of purity of strontium silicate was studied using X-ray diffraction and electron scanning electron microscope and differential thermal-hot heavy analyzer. The formation mechanism of strontium silicate by chemical deposition method was analyzed. The results show that: the sintering temperature is effect on phase composition and microstructure of the strontium silicate, Compared with traditional high temperature solid reaction process, the chemical deposition method could greatly reduce the sintering temperature, and improve the powder purity.

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