Effect of carbonization temperature on the textural properties of Ce0.8Zr0.2O2 solid solution by an improved citrate sol–gel method

In this work there was studied the structural, textural and effect that has treat thermal on the removal of Cr (VI) of nanoMg/Al hydrotalcite (NHT) synthesized by the sol-gel method with a ratio of Mg/Al=3. These present the characterization of the nanoMg/Al hydrotalcite before and after Cr (VI) removal, as well as the kinetic studies and of balance. In agreement with the results, when the NHT are thermal treated to 350 °C the hydrotalcite crystalline structure remains but the textural properties are improved and structural. The NHT synthesized by the sol-gel method present a good capacity of removal with values of 91 mg of Cr (VI) removed / g of NHT. The above mentioned capacity of removal gets improved after thermal treating the material, reaching values of removal of 124 mg of Cr (VI) removed / g of NHT. The NHT with the Cr (VI) absorbed show decrease of the crystalline structure, as well as a saturation of the pores that annuls the porosity due to the fact that the Cr (VI) lodges both at the pores and at the intersheets. The time that him takes the HLM to remove the Cr (VI) of the watery solution is alone of 2 minutes, with which it is possible to conclude that the NHT have an excellent aptitude to remove Cr (VI) of watery solutions in an interval of very short time.

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Synthesis of hydroxyapatite/fluoroapatite solid solution by a sol–gel method

Materials Letters ◽

10.1016/s0167-577x(01)00261-0 ◽

2001 ◽

Vol 51 (1) ◽

pp. 37-41 ◽

Cited By ~ 41

Author(s):

Kui Cheng ◽

Ge Shen ◽

Wenjian Weng ◽

Gaorong Han ◽

Jose M.F. Ferreira ◽

...

Keyword(s):

Solid Solution ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

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Comparative study on photocatalytic activity of transition metals (Ag and Ni)-doped ZnO nanomaterials synthesized via sol–gel method

Royal Society Open Science ◽

10.1098/rsos.191590 ◽

2020 ◽

Vol 7 (2) ◽

pp. 191590 ◽

Cited By ~ 3

Author(s):

A. K. Azfar ◽

M. F. Kasim ◽

I. M. Lokman ◽

H. A. Rafaie ◽

M. S. Mastuli

Keyword(s):

Photocatalytic Activity ◽

Active Sites ◽

Sol Gel ◽

Textural Properties ◽

High Photocatalytic Activity ◽

Factors Affecting ◽

Gel Method ◽

Sol Gel Method ◽

Zno Nanomaterials ◽

Almost All

Ag and Ni/ZnO photocatalyst nanostructures were successfully synthesized by a sol–gel method. In this work, the photocatalyst sample was systematically studied based on several factors affecting the performance of photocatalyst, which are size, morphology, band gap, textural properties and the number of active sites presence on the surface of the nanocatalyst. X-ray diffraction revealed that Ag/ZnO nanomaterials experienced multiple phases, meanwhile for Ni/ZnO the phase of nanomaterials were pure and single phase for stoichiometry less than 5%. Field emission scanning electron microscope (FESEM) showed almost all of the synthesized nanomaterials possessed a mixture of nanorods and spherical-like shape morphology. The Ag/ZnO showed high photocatalytic activity, producing at least 14th trials of nanocatalyst reusability on degradation of methyl orange under UV irradiation. Interestingly, this phenomenon was not observed in larger surface area of Ni/ZnO nanomaterials which supposedly favour photocatalytic activity, but instead producing poor photocatalytic performance. The main reasons were studied and exposed by temperature-programmed desorption of carbon dioxide (TPD–CO 2 ) which showed that incorporation of Ag into ZnO lattice has enhanced the number of active sites on the surface of the nanocatalyst. Whereas incorporation of Ni in ZnO has lowered the number of active sites with respect to undoped ZnO. Active sites measurement is effective and significant, providing opportunities in developing an intensive study as an additional factor.

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Preparation of Mesoporous Ni–alumina Catalyst by One-step Sol–gel Method: Control of Textural Properties and Catalytic Application to the Hydrodechlorination of o-dichlorobenzene

Catalysis Letters ◽

10.1007/s10562-005-7949-5 ◽

2005 ◽

Vol 104 (3-4) ◽

pp. 181-189 ◽

Cited By ~ 33

Author(s):

P. Kim ◽

J.B. Joo ◽

H. Kim ◽

W. Kim ◽

Y. Kim ◽

...

Keyword(s):

Sol Gel ◽

Textural Properties ◽

Alumina Catalyst ◽

Gel Method ◽

Sol Gel Method ◽

Catalytic Application ◽

One Step

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Synthesis of Li3xLa1−xVO4 solid solution by citrate sol–gel method and its ionic conductivity

Materials Chemistry and Physics ◽

10.1016/s0254-0584(00)00204-2 ◽

2000 ◽

Vol 65 (1) ◽

pp. 85-89 ◽

Cited By ~ 5

Author(s):

Xiuqin Song ◽

Rufen Chen ◽

Miying Jia

Keyword(s):

Solid Solution ◽

Ionic Conductivity ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method

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Structural, Optical and Magnetic Properties of (1−x)Bi0.5Na0.5TiO3+xBaCoO3−δ Solid Solution Systems Prepared by the Sol–Gel Method

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19090 ◽

2021 ◽

Vol 21 (4) ◽

pp. 2604-2612

Author(s):

Dang Duc Dung ◽

Nguyen The Hung

Keyword(s):

Solid Solution ◽

Magnetic Properties ◽

Sol Gel ◽

Host Lattice ◽

Ferroelectric Materials ◽

X Ray Diffraction ◽

Gel Method ◽

Sol Gel Method ◽

Lattice Materials ◽

Rhombohedral Symmetry

A new solid solution, (1−x)Bi0.5Na0.5TiO3+xBaCoO3−δ materials, was fabricated using the sol–gel method. X-ray diffraction showed that the crystal structure of the compound exhibited rhombohedral symmetry and is similar to the crystal structures of host Bi0.5Na0.5TiO3 materials. Distortions in the structures and reduction in the optical band gaps of the Bi0.5Na0.5TiO3 materials were possibly due to the random incorporation of Ba and Co cations into host lattice materials. The magnetic properties of the Bi0.5Na0.5TiO3 materials were tuned by controlling the concentrations of BaCoO3−δ as the solid solution. We expect that our work will provide valuable information on current methods for integrating ferromagnetic properties into lead-free ferroelectric materials for the development of multiferroic materials.

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The Impact of Zr Substitution on the Crystal Structure of Yb Doped BaCeO3 Solid Solution Prepared by a Sol-Gel Method

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.317.412 ◽

2021 ◽

Vol 317 ◽

pp. 412-416

Author(s):

Nafisah Osman ◽

Nurul Waheeda Mazlan ◽

Oskar Hasdinor Hassan ◽

Zakiah Mohamed

Keyword(s):

Crystal Structure ◽

Solid Solution ◽

Goodness Of Fit ◽

Sol Gel ◽

Proton Conductor ◽

Diffraction Measurement ◽

Barium Cerate ◽

Gel Method ◽

Sol Gel Method ◽

The Impact

A modified sol-gel method using metal nitrate salts was adopted to synthesis proton conductor of Ba(Ce1-xZrx)0.95Yb0.05O2.975 where x=0.2, 0.3, 0.4, 0.5 and 0.6 ceramic powders. The aim of this work is to study the crystal structure of Yb-doped barium cerate solid solution at different Zr concentrations. The powder was calcined at 1100°C for 12 hours and pressed at 5 tons to become a pellet by a dry pressing technique. The pellet was sintered at 1400°C in air for 6 hours and ground to powder form prior to the X-ray diffraction measurement. The raw diffraction data of the sample at room temperature was analyzed using Rietveld refinement method in X’pert Highscore software. Cubic crystal structure was observed by software with goodness of fit in average 2.82. Phase formation, structure analysis and the empirical rule which holds the linear relation between lattice parameters at different Zr concentrations using Vegard’s Law were also presented and discussed.

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Gelatin Template Synthesis of Aluminum Oxide and/or Silicon Oxide Containing Micro/Mesopores Using the Proteic Sol-Gel Method

Journal of Nanomaterials ◽

10.1155/2017/2504796 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Amanda Sayure Kasuya de Oliveira ◽

Adriana Perpetua Figueiredo Paulista ◽

Ana Ellen Valentim de Alencar ◽

Tiago Pinheiro Braga

Keyword(s):

Aluminum Oxide ◽

Silicon Oxide ◽

Amorphous Material ◽

Sol Gel ◽

Textural Properties ◽

Gel Method ◽

Sol Gel Method ◽

Mesoporous Oxide ◽

Stretching Vibration ◽

Different Characteristics

Aluminum oxide and/or silicon oxide-based supports were synthesized by proteic sol-gel method. The characterization was performed through the analysis of TG, XRD, FTIR, SEM, and N2 physisorption. The XRD diffractograms showed an amorphous material profile. TG results indicate the total liberation of the organic and inorganic material in the calcination temperature used, occurring in different mass loss range. This piece of information was reaffirmed by the FTIR spectra, which presented characteristic bands of gelatin structure before calcinations which disappear in the spectrum of the solid after calcinations, indicating the loss of organic matter from gelatin after heat treatment. The spectra exhibited M-O stretching vibration at low wavenumbers after calcinations related to metal oxides. The acquired images by SEM suggest the obtaining of a highly porous material with very different characteristics depending on the composition of the support. The N2 isotherms indicate the presence of a micro/mesoporous oxide with interesting textural properties, particularly for the supports containing aluminum and silicon oxide. The ethanol dehydration results showed greater selectivity to diethyl ether compared to ethylene. From the reaction data, the following order of acid strength was obtained: 2Si-Al > Si-2Al > Si-Al > Al, which is related to the Si-Al ratio.

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