scholarly journals Photoetching of Immobilized --PVC Composite for Improved Photocatalytic Activity

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
M. A. Nawi ◽  
Y. S. Ngoh ◽  
S. M. Zain
Keyword(s):  
Oxygen Demand ◽  
Dip Coating ◽  
Bet Surface Area ◽  
Photocatalytic Efficiency ◽  
Solution Ph ◽  
X Ray ◽  
Coating Method ◽  
Compact Fluorescent Lamp ◽  
Dip Coating Method ◽  
Repeated Runs

Commercially acquired TiO2photocatalyst (99% anatase) powder was mixed with epoxidized natural rubber-50 (ENR50)/polyvinyl chloride (PVC) blend by ultrasonication and immobilized onto glass plates as TiO2-ENR50-PVC composite via a dip-coating method. Photoetching of the immobilized TiO2-ENR50-PVC composite was investigated under the irradiation of a 45 W compact fluorescent lamp and characterized by chemical oxygen demand (COD) analysis, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) spectrometry, thermogravimetry analysis (TGA), and fourier transform infrared (FTIR) spectroscopy. The BET surface area of the photoetched TiO2composite was observed to be larger than the original TiO2powder due to the systematic removal of ENR50while PVC was retained within the composite. It also exhibited better photocatalytic efficiency than the TiO2powder in a slurry mode and was highly reproducible and reusable. More than 98% of MB removal was consistently achieved for 10 repeated runs of the photo-etched photocatalyst system. About 93% of the 20 mg L−1MB was mineralized over a period of 480 min. The presence of , , and Cl−anions was detected in the mineralized solution where the solution pH was reduced from 7 to 4.

scholarly journals Sol-Gel Synthesis of TiO2/SiO2 and ZnO/SiO2 Composite Films and Evaluation of Their Photocatalytic Activity towards Methyl Green

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
V. L. Chandraboss ◽  
B. Karthikeyan ◽  
J. Kamalakkannan ◽  
S. Prabha ◽  
S. Senthilvelan
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
Methyl Green ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Coating Method ◽  
Dip Coating Method

The TiO2/SiO2 and ZnO/SiO2 composite films were prepared by sol-gel dip coating method. The surface morphology and crystal structure of thin films were characterized by means of scanning electron microscopy (SEM) with elementary dispersive X-ray analysis (EDX) and X-ray diffractometer (XRD). Optical properties of films have been investigated using ultraviolet and visible spectroscopy (UV-visible spectroscopy). The photocatalytic activity was established by testing the degradation and decolorization of methyl green (MG) from aqueous solution with artificial UV-light.

Fabrication of Uniformly Growing Graphene Films via the Dip-Coating Method

2013 ◽  
Vol 320 ◽  
pp. 185-189
Author(s):  
Juan Yang ◽  
Hong Bo Sun ◽  
Dan Li
Keyword(s):  
Sheet Resistance ◽  
Photoelectron Spectroscopy ◽  
Dip Coating ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Graphene Films ◽  
Coating Method ◽  
Dip Coating Method ◽  
Dip Coating Technique

The graphene (GE) films were fabricated in this paper through the deposition of graphene oxide (GO) sheets onto the quartz slide by means of dip-coating technique, followed by thermal annealing. The growth process and transmittance of the film were monitored by ultraviolet and visible spectrophotometer (UV-Vis), the surface morphology and structure were investigated by Atomic force microscopy (AFM), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Raman. The sheet resistance of the film was also tested and results showed that the sheet resistance is about 60 kΩ-1and the transmittance is as high as 81 % (at 550 nm).

scholarly journals Surface Modification of LiMn2O4for Lithium Batteries by Nanostructured LiFePO4Phosphate

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
B. Sadeghi ◽  
R. Sarraf-Mamoory ◽  
H. R. Shahverdi
Keyword(s):  
Electron Microscopy ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electrochemical Tests ◽  
Transmission Electron ◽  
Coating Method ◽  
Dip Coating Method ◽  
Spinel Cathode

LiMn2O4spinel cathode materials have been successfully synthesized by solid-state reaction. Surface of these particles was modified by nanostructured LiFePO4via sol gel dip coating method. Synthesized products were characterized by thermally analyzed thermogravimetric and differential thermal analysis (TG/DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX). The results of electrochemical tests showed that the charge/discharge capacities improved and charge retention of battery enhanced. This improved electrochemical performance is caused by LiFePO4phosphate layer on surfaces of LiMn2O4cathode particles.

scholarly journals Synthesis of Nanostructured Nanoclay-Zirconia Multilayers: a Feasibility Study

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
Hao Chen ◽  
Guoping Zhang ◽  
Kathleen Richardson ◽  
Jian Luo
Keyword(s):  
Structural Integrity ◽  
Dip Coating ◽  
Functionally Graded ◽  
Layer By Layer ◽  
Deposition Technique ◽  
X Ray ◽  
Coating Method ◽  
Potential Applications ◽  
Ultrathin Oxide Films ◽  
Dip Coating Method

This paper reports the first effort to synthesize a new class of inorganic nanostructured materials consisting of alternating ultrathin layers of nanoclays and oxide ceramics. A novel solution-based layer-by-layer (LBL) deposition technique was developed to prepare multilayers of hydrated Zr cations and nanoclays. This LBL deposition technique is devised by integrating an electrostatic-mediated dip coating method for making nanoclay-polymer multilayers with a successive ionic layer adsorption and reaction method for making ultrathin oxide films. Nanostructured clay-zirconia multilayer composites formed through subsequent annealing. Characterization by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction confirmed that these films are uniform and crack-free, consist of no detectable impurities, and possess nanoscale-layered structure. The incorporation of nanoclays facilitates the electrostatic-mediated assembling of multilayers, enhances the structural integrity, and provides a generic framework to construct functionally graded materials. Potential applications are envisaged.

Preparation and Properties of TiO2/SiO2 Thin Films on Enamel Substrates

2016 ◽  
Vol 848 ◽  
pp. 717-721
Author(s):  
Li Yun Chen ◽  
Xiao Ping Liao ◽  
Wei Zhong Jiang ◽  
Jia Yi Ye ◽  
Hui Le Jin ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Ccd Camera ◽  
Dip Coating ◽  
Micro Structure ◽  
X Ray ◽  
Hydrophilic Property ◽  
Coating Method ◽  
Dip Coating Method ◽  
Scanning Electron

nanosize TiO2/SiO2 thin films were deposited by sol-gel dip-coating method on enamel substrates. Crystal structure, micro-structure, hydrophilic property, gloss property was investigated by X-ray diffract meter, scanning electron microscope, CCD camera, enamel gloss meter. The results show that the hydrophilic property of the enamel was greatly increased by heating the enamel with coating TiO2/SiO2 film; the gloss property of the enamel surface greatly increased after the enamel coated with TiO2/SiO2 film. The main crystals in TiO2/SiO2 film on the enamel were anatase when the baking temperature was below the 700°C.

The Influence of Formula and Process on Physical Properties and the Release Profile of PVA/BSA Nanofibers Formed by Electrospinning Technique

2015 ◽  
Vol 31 ◽  
pp. 103-116 ◽  
Author(s):  
Chandra Risdian ◽  
Muhamad Nasir ◽  
Annisa Rahma ◽  
Heni Rachmawati
Keyword(s):  
Dip Coating ◽  
Differential Scanning Calorimetric ◽  
X Ray Diffraction ◽  
Successful Development ◽  
Electrospinning Technique ◽  
X Ray ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Electrospinning Method ◽  
Coating Method ◽  
Dip Coating Method

Electrospinning is a simple versatile process to produce nanofibers. However, it requires careful approach to form appropriates fibers for different purposes. This report describes aspects influencing successful development of nanofiber containing BSA using electrospinning method. Optical and scanning electron microscopy, energy dispersive X-Ray and Fourier transformed infrared spectroscopy, differential scanning calorimetric, and X-Ray diffraction analysis of nanofiber were performed. Modification of PVA/BSA nanofiber with Eudragit L-100 was conducted by dip coating method. The presence of BSA increased the diameter of the fibers. Modification of PVA/BSA nanofiber with Eudragit L-100 delayed the release of BSA in acidic medium but promoting its release in intestinal mimicking medium.

Characterization of Nickel-Antimony Doped Tin Oxide Electrodes Prepared via Sol-Gel Dip-Coating Method

2013 ◽  
Vol 734-737 ◽  
pp. 2155-2158 ◽  
Author(s):  
Yun Hai Wang ◽  
Zi Zhou Nie ◽  
Yong Rong Liang
Keyword(s):  
Tin Oxide ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Generation Efficiency ◽  
X Ray ◽  
Ozone Generation ◽  
Oxide Electrodes ◽  
Coating Method ◽  
Dip Coating Method

Nickel and antimony doped tin oxide (NATO) electrodes were prepared by sol-gel dip-coating method. The effect of doping levels was investigated via scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The electrochemical ozone generation efficiency was also tested. The results showed that sol-gel prepared electrodes had a smoother surface morphology and lower current efficiency for ozone generation than electrodes prepared by traditional pyrolysis method. The nickel and antimony doping lead to a decrease in the crystallites size, while its effects on ozone generation efficiency were complex.

Magnesium Incorporation in Sol-Gel Derived Apatite Coating on Ti6Al4V Substrate

2011 ◽  
Vol 299-300 ◽  
pp. 448-451
Author(s):  
Guo Chao Qi ◽  
Sam Zhang ◽  
Qiang Li ◽  
Feng Jun Shan ◽  
Jing Yuan Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Dip Coating ◽  
Xps Analysis ◽  
Apatite Structure ◽  
X Ray ◽  
Apatite Coating ◽  
Coating Method ◽  
Dip Coating Method

A series of the magnesium apatite coatings according to (Ca10-xMgx)(PO4)6(OH)2, where x = 0 to 2, was synthesized through a sol-gel dip-coating method. The roughness of the magnesium coatings increased as more magnesium incorporated into the coatings. The mechanical properties of the coatings were analyzed with Nanoindentor. The incorporation of magnesium decreased the hardness and the Young’s modulus of the coating. The X-ray Photoelectron Spectroscopy (XPS) analysis revealed that only part of magnesium was incorporated into the apatite structure while the rest existed in the form of MgO in the coating.

scholarly journals SYNTHESIS OF CHITOSAN/TiO2 COMPOSITE AND ITS COATING ON SURFACE OF TEXTILE SUBSTRATE

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 265
Author(s):  
Agung Nugroho Catur Saputro
Keyword(s):  
Performance Test ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ftir Spectrometry ◽  
Coating Method ◽  
Dip Coating Method

Coatings of composite Chitosan/TiO2 on a surface of textile have been successfully performed. These coatings were done by dip-coating method. The variety of coatings textile were performed in 2, 4, and 6 coatings. The textile was coated by composite of Chitosan/TiO2 then characterized by FTIR Spectrometry, X-Ray Diffraction and Scanning Elelectron Microscopy (SEM). Based on the spectra of FTIR Spectrofotometry, XRD difractogram and imaging of SEM it can be concluded that hypothesized composite of Chitosan/TiO2 was coated on surface of textile but that hypothesis were still very weak and it need to be examined by performance test.

In Vitro Behavior of Magnesium Apatite Coatings in Organic Modified Simulated Body Fluid

2011 ◽  
Vol 299-300 ◽  
pp. 508-511
Author(s):  
Guo Chao Qi ◽  
Feng Jun Shan ◽  
Qiang Li ◽  
Jing Yuan Yu ◽  
Qu Kai Zhang
Keyword(s):  
Simulated Body Fluid ◽  
Photoelectron Spectroscopy ◽  
Body Fluid ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray ◽  
Coating Method ◽  
Sbf Solution ◽  
Dip Coating Method

Magnesium apatite (MA, (Ca9Mg)(PO4)6(OH)2) and Hydroxyapatite (HA) coatings were synthesized on Ti6Al4V substrates by a sol-gel dip coating method. Glucose and bovine serum albumin (BSA) were added to the standard simulated body fluid (SBF) separately to form organic-containing simulated body fluids. MA and HA coatings were immersed in standard and organic modified SBF for time periods of 4, 7, 14, 21 and 28 days at 37±1°C. The surface dissolution and deposition behavior of the coatings after soaking were examined with Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS). The results show that glucose in SBF has no apparent effect on the deposition of new apatite from the solution. BSA in SBF shows retardation effect on the deposition of apatite by forming a protein dominant globular layer. This layer inhibits the further deposition of apatite from SBF solution.

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