Synthesis of TiO2/Polymer Composite Microspheres Using Functional Porous Polymer Particle as Substrate

2010 ◽  
Vol 97-101 ◽  
pp. 1573-1577
Author(s):  
Sen Li ◽  
Kuan Wang ◽  
Chun Lian Song ◽  
Jiang Cheng ◽  
Zhuo Ru Yang
Keyword(s):  
Functional Groups ◽  
Polymer Composite ◽  
Pore Diameter ◽  
Polymer Particle ◽  
Porous Polymer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Composite Microspheres ◽  
Divinyl Benzene ◽  
Porous Poly

This study described a different nano-titania(TiO2)/polymer composite where TiO2 were uniformly deposited on the porous poly(styrene-divinyl benzene-co-maletic anhydride)　[poly(st-DVB-co-MAH)] microspheres. The morphology of the composite microspheres was analyzed by scanning electron microscope and X-ray diffraction. Both the diameter of the pore and the MAH functional groups played a crucial role in controlling the structure of TiO2 shell. The rutile nanoparticles were incorporated evenly onto the surface of the porous microspheres when microspheres with pore diameter of about 146.8 nm and with surface 30 wt% functional groups (MAH) were used as substrate.

scholarly journals Solidified Fillings of Nanopores

2005 ◽  
Vol 876 ◽  
Author(s):  
Patrick Huber ◽  
Klaus Knorr
Keyword(s):  
Pore Diameter ◽  
Stacking Faults ◽  
Pore Geometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Medium Length ◽  
Close Packed Structure ◽  
Packed Structure ◽  
Diffraction Patterns ◽  
Selection Of

AbstractWe present a selection of x-ray diffraction patterns of spherical (He, Ar), dumbbell- (N2, CO), and chain-like molecules (n-C9H20, n-C19H40) solidified in nanopores of silica glass (mean pore diameter 7nm). These patterns allow us to demonstrate how key principles governing crystallization have to be adapted in order to accomplish solidification in restricted geometries. 4He, Ar, and the spherical close packed phases of CO and N2 adjust to the pore geometry by introducing a sizeable amount of stacking faults. For the pore solidified, medium-length chainlike n-C19H40 we observe a close packed structure without lamellar ordering, whereas for the short-chain C9H20 the layering principle survives, albeit in a modified fashion compared to the bulk phase.

scholarly journals Incorporation of Brazilian Diatomite in the Synthesis of An MFI Zeolite

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1980 ◽  
Author(s):  
Paloma Vinaches ◽  
Anderson Joel Schwanke ◽  
Christian Wittee Lopes ◽  
Iane M. S. Souza ◽  
Jhonny Villarroel-Rocha ◽  
...  
Keyword(s):  
Natural Resource ◽  
Industrial Production ◽  
Pore Diameter ◽  
Environmental Agreements ◽  
Gas Sorption ◽  
X Ray Diffraction ◽  
Mfi Zeolite ◽  
X Ray ◽  
Diffraction Microscopy

The need for greener procedures is a fact to reduce residues, to decrease industrial costs, and to accomplish the environmental agreements. In an attempt to address this question, we propose the addition of a natural resource, Brazilian diatomite, to an MFI zeolite traditional synthesis. We have characterized the resulting product with different techniques, such as X-ray diffraction, microscopy, and gas sorption, and, afterwards, we evaluate the greenness of the process by the Green Star method. The results were promising: We obtained the desired topology in the form of small crystallites aggregated and a pore diameter of 0.8 nm. In conclusion, the product has the necessary characteristics for an adsorption or catalytic future tests and escalation to industrial production.

scholarly journals Corrosion Inhibition of Mild Steel by Poly(butylene succinate)-L-histidine Extended with 1,6-diisocynatohexane Polymer Composite in 1 M HCl

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
M. G. Tsoeunyane ◽  
M. E. Makhatha ◽  
O. A. Arotiba
Keyword(s):  
Mild Steel ◽  
Corrosion Inhibition ◽  
Polymer Composite ◽  
Electrochemical Impedance ◽  
Condensation Polymerization ◽  
X Ray Diffraction ◽  
Butylene Succinate ◽  
X Ray ◽  
Atomic Force ◽  
Corrosion Inhibition Efficiency

The ecofriendly poly(butylene succinate) extended with 1,6-diisocynatohexane composted with L-histidine (PBSLH) polymer composite was synthesized by condensation polymerization. The polymer composite was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscope (SEM-EDX). The inhibition action of the polymer composite was investigated by conventional weight loss, potentiodynamic polarization, variable amplitude micro (VASP), and electrochemical impedance spectroscopy (EIS). The maximum corrosion inhibition efficiency of 78 % was obtained at concentration level of 600 ppm. The results revealed PBSLH as a mixed type corrosion inhibitor. The thermodynamic and kinetic parameters also revealed adsorption of PBSLH on to mild surface as exothermic and the adsorption was conformed to Langmuir model. The morphology of mild steel coupons was investigated by SEM and atomic force microscope (AFM) and the results showed PBSLH to have inhibited corrosion on mild steel in 1 M HCL.

scholarly journals Structural Characterization of Graphene Oxide: Surface Functional Groups and Fractionated Oxidative Debris

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1180 ◽  
Author(s):  
Elvin Aliyev ◽  
Volkan Filiz ◽  
Muntazim M. Khan ◽  
Young Joo Lee ◽  
Clarissa Abetz ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Functional Groups ◽  
Structural Model ◽  
Oxide Surface ◽  
Resonance Spectroscopy ◽  
X Ray Diffraction ◽  
Surface Functional Groups ◽  
X Ray ◽  
Transmission Electron

The purpose of this work is the structural analysis of graphene oxide (GO) and by means of a new structural model to answer the questions arising from the Lerf–Klinowski and the Lee structural models. Surface functional groups of GO layers and the oxidative debris (OD) stacked on them were investigated after OD was extracted. Analysis was performed successfully using Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis), X-ray photoemission spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, solid-state nuclear magnetic resonance spectroscopy (SSNMR), standardized Boehm potentiometric titration analysis, elemental analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The analysis showed that graphene oxide layers, as well as oxidative debris contain different functional groups such as phenolic –OH, ketone, lactone, carboxyl, quinone and epoxy. Based on these results, a new structural model for GO layers is proposed, which covers all spectroscopic data and explains the presence of the other oxygen functionalities besides carboxyl, phenolic –OH and epoxy groups.

Magnetic Composite Microspheres of Cassava Starch: Preparation and Characterization

2014 ◽  
Vol 926-930 ◽  
pp. 145-149
Author(s):  
Ping Lan ◽  
Yu Xian Feng ◽  
Ri Mei He ◽  
Lei Lei Qiao ◽  
Li Hong Lan ◽  
...  
Keyword(s):  
Cassava Starch ◽  
Magnetic Composite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Preparation Conditions ◽  
Composite Microspheres ◽  
Condition Effect ◽  
Initial Ph ◽  
One Step ◽  
Solution Volume

The magnetic composite microspheres of cassava starch have been prepared by magnetization of one-step oxidation, using cassava starch as natural macromolecule material. The condition effect on magnetic content was evaluated by single factor experiments, such as the mass concentration of starch, reaction temperature, reaction time, stirring speed, initial pH and ferrous solution volume. Preparation conditions were optimized by these evaluation experiments. The prepared magnetic composite microspheres were characterized by infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), and other means.

Fabrication of Anodic Alumina Templates on Ti/Si Substrate and Preparation of Cu Nanorods by Electrochemical Process

2014 ◽  
Vol 1024 ◽  
pp. 27-30
Author(s):  
Khaled M. Chahrour ◽  
Naser M. Ahmed ◽  
M. Roslan Hashim ◽  
Nezar Gassem Elfadill
Keyword(s):  
Pore Diameter ◽  
Electrochemical Process ◽  
Anodic Alumina ◽  
Wet Etching ◽  
Etching Time ◽  
X Ray Diffraction ◽  
Aao Template ◽  
Si Substrate ◽  
X Ray ◽  
Anodic Alumina Templates

Abstract: Thin anodic alumina (AAO) templates with uniform nanoscale pore diameters and interpore distances were fabricated by a two-step anodization technique on a Si-based (AAO/Ti/Si structure) under controllable anodizing conditions. The obtained thin AAO templates were approximately 60 nm in pore diameter and 1.2 µm in length with 110 nm interpore distances in area of 1 cm2. A bottom barrier layer of the anodic alumina (AAO) templates was removed by a wet etching using phosphoric acid (5 wt%) under control of etching time. As an application, Cu nanorods arrays embedded in anodic alumina (AAO) template were fabricated by electrodeposition. The morphologies and structure of the templates and the Cu nanorods produced were analyzed using Field-emission scanning electron microscope (FESEM), Energy dispersive x-ray spectroscopy (EDX) and X-ray diffraction (XRD).

Fabrication of Sandwich-Like Hydroxyapatite-Al2O3-Si(100) Biocomposite

2011 ◽  
Vol 287-290 ◽  
pp. 2015-2022
Author(s):  
Zhen Jun Wu ◽  
Jian Min Yuan ◽  
Wen Sheng Li
Keyword(s):  
Physical Vapor Deposition ◽  
Energy Dispersive Spectrometry ◽  
Annealing Temperature ◽  
Pore Diameter ◽  
Atomic Ratio ◽  
Hybrid Technique ◽  
Aluminum Layer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pore Widening

A novel composite biocoating of hydroxyapatite(HA)/Al2O3has been successfully prepared on Si(100) substrate by a hybrid technique of physical vapor deposition (PVD), anodization, and electrodeposition. The fabricated composite biocoating was also annealed under temperatures ranging from 573 to 973 K. Scanning electron microscope (SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD) were employed to investigate morphologies and compositions of the HA/Al2O3composite biocoating. It is found that Ca-deficient hydroxyapatite (CDHA) coating holding a Ca/P atomic ratio of 1.61 has been directly electrodeposited onto porous anodic Al2O3with 1.5~3 μm pore diameter formed by anodization of PVD-deposited aluminum layer on Si(100) and subsequent pore-widening. The embedding of HA outer coating into porous anodic Al2O3results in a sandwich-like structure in the finally obtained HA/Al2O3composite biocoating on Si(100). XRD results indicate the decomposition of HA into β-TCP at an annealing temperature above 873 K.

Preparation and Characterization TiO2 Aerogel Fibers

2013 ◽  
Vol 743-744 ◽  
pp. 434-437
Author(s):  
Miao Lv ◽  
Guo Tong Qin ◽  
Wei Wei
Keyword(s):  
Electron Microscopy ◽  
Pore Diameter ◽  
Supercritical Drying ◽  
Mass Ratio ◽  
Composite Fibers ◽  
X Ray Diffraction ◽  
Average Pore ◽  
X Ray ◽  
Adsorption Desorption ◽  
Scanning Electron

TiO2aerogel fibers have been fabricated by electron span combined supercritical drying technique. Polyvinylpyrrolidone (PVP)/TiO2composite fibers are prepared by electrospinning PVP and TiO2precursor Ti (OC4H9)4. TiO2aerogel fibers are obtained by supercritical drying PVP/TiO2composite fibers using ethanol as media. Structural of the aerogel fibers was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and N2adsorption at 77 K. The effect of mass ratio of PVP/TiO2was investigated. SEM shows that pore structure of nanofibers was well developed, with the diameter of nanofibers about 2 μm. N2adsorption/desorption data show that the highest surface area of aerogel fibers reached 241.6 m2/g with the average pore diameter about 10 nm. The aerogel fibers were anatase type TiO2.

scholarly journals Synthesis of ferrocene amides and esters from aminoferrocene and 2-substituted ferrocenecarboxylic acid and properties thereof

2016 ◽  
Vol 40 (11) ◽  
pp. 9441-9447 ◽  
Author(s):  
Palabindela Srinivas ◽  
Sunchu Prabhakar ◽  
Floris Chevallier ◽  
Ekhlass Nassar ◽  
William Erb ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Functional Groups ◽  
Intermolecular Hydrogen Bond ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Structure ◽  
Ferrocenecarboxylic Acid

The X-ray diffraction structure of the ferrocene ester FcE-1 showed the presence of an intermolecular hydrogen bond between the amide functional groups.

Enhanced UV Photodetector Responsivity in Porous GaN/Si(111) by Metal-Assisted Electroless Etching

2007 ◽  
Vol 31 ◽  
pp. 39-41 ◽  
Author(s):  
Lee Siang Chuah ◽  
Hassan Zainuriah ◽  
Abu Hassan Haslan
Keyword(s):  
Pore Diameter ◽  
Near Band Edge ◽  
X Ray Diffraction ◽  
Optical Studies ◽  
Uv Photodetector ◽  
X Ray ◽  
Grown Sample ◽  
Metal Semiconductor Metal ◽  
Porous Area ◽  
Near Band Edge Peak

This paper presents the structural and optical studies of porous GaN sample compared to the corresponding as grown GaN. The samples were investigated by scanning electron microscopy (SEM), high resolution x-ray diffraction (HRXRD), and photoluminescence (PL). The porous area is very uniform, with pore diameter in the range of 80-110 nm. XRD measurements showed that the (0002) diffraction plane peak width of porous samples was slightly broader than the as-grown sample. PL measurements revealed that the near band edge peak of the porous samples were redshifted. Metal-semiconductor-metal (MSM) photodiode was fabricated on the samples. For as grown GaN sample, this detector shows a sharp cut-off wavelength at 362 nm. A maximum responsivity of 0.258 A/W was achieved at 360 nm. For the porous GaN sample, this detector shows a sharp cut-off wavelength at 364 nm. A maximum responsivity of 0.771 A/W was achieved at 363 nm.

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