Fabrication of nanospinel ZnCr2O4 using sol–gel method and its application on removal of azo dye from aqueous solution

2010 ◽  
Vol 184 (1-3) ◽  
pp. 684-689 ◽  
Author(s):  
Mohammad Yazdanbakhsh ◽  
Iman Khosravi ◽  
Elaheh K. Goharshadi ◽  
Abbas Youssefi
Keyword(s):  
Aqueous Solution ◽  
Azo Dye ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals A reversible, colorimetric, pH-responsive indole-based hydrogel and its application in urea detection

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24299-24304
Author(s):  
Yan Wang ◽  
Xuan Luo ◽  
Longfei Zhang ◽  
Shuai Zhang ◽  
Lin Zhang
Keyword(s):  
Aqueous Solution ◽  
Colorimetric Detection ◽  
Sol Gel ◽  
Ph Responsive ◽  
Gel Method ◽  
Sol Gel Method ◽  
New Type

A new type of pH-responsive indole-based (4-HINF) hydrogel, fabricated by a sol–gel method, was utilized as a platform for colorimetric detection of urea in aqueous solution.

Preparation of Sodium Ionic Conductor Based on Sol-Gel Method Using Aqueous Solution

1995 ◽  
Vol 34 (Part 2, No. 7A) ◽  
pp. L833-L836 ◽  
Author(s):  
Youichi Shimizu ◽  
Satoko Michishita ◽  
Takahiro Murata
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Ionic Conductor ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Synthesis and characterization of poly-aluminum silicate sulphate (PASS) for ultra-low density fiberboard (ULDF)

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 93187-93193 ◽  
Author(s):  
Tingjie Chen ◽  
Min Niu ◽  
Xiaodong Wang ◽  
Wei Wei ◽  
Jinghong Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sodium Silicate ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Aluminum Silicate ◽  
Low Density ◽  
Gel Method ◽  
Sol Gel Method ◽  
Mixed Aqueous Solution

Poly-aluminum silicate sulphate (PASS) was synthesized in a mixed aqueous solution of sodium silicate and aluminum silicate via a sol–gel method for use in ultra-low density fiberboard (ULDF).

Preparation of Superconducting Bi-Sr-Ca-Cu-O Coating Films by the Sol-Gel Method Using an Aqueous Solution of Metal Acetates

1990 ◽  
Vol 29 (Part 2, No. 7) ◽  
pp. L1107-L1110 ◽  
Author(s):  
Haoren Zhuang ◽  
Hiromitsu Kozuka ◽  
Toshinobu Yoko ◽  
Sumio Sakka
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Coating Films ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Preparation of magnetic porous NiFe2O4/SiO2 composite xerogels for potential application in adsorption of Ce(iv) ions from aqueous solution

RSC Advances ◽  
2017 ◽  
Vol 7 (27) ◽  
pp. 16513-16523 ◽  
Author(s):  
Huiqin Fu ◽  
Xingeng Ding ◽  
Chunrong Ren ◽  
Wenqi Li ◽  
Huating Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Potential Application ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Porous Adsorbent

In this work, a novel magnetic porous adsorbent was prepared via a sol–gel method for the removal of Ce(iv) from aqueous solution.

Spinnable Sol Prepared by NHSG Method Used for Mullite Continues Fiber

2016 ◽  
Vol 680 ◽  
pp. 111-114
Author(s):  
Qing Rong Kong
Keyword(s):  
Aqueous Solution ◽  
Ftir Spectroscopy ◽  
Aging Time ◽  
Sol Gel ◽  
Polyvinyl Butyral ◽  
Absorption Peak ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composite Gel ◽  
Mullite Fibers

Composite sol with spinnability was prepared from an aqueous solution using polyvinyl butyral (PVB), Al (NO3)3·9H2O (AN) and tetraethylorthosilicate (TEOS) via non-hydrolytic sol-gel method. The mullite fibers with good flexibility were also obtained. The viscosity of composite sol increased with the increasing PVB content, water-bathing temperature and aging time. FTIR spectroscopy of composite gel showed a new absorption peak due to the C=O group, which implied the presence of new reaction product. It could be explained by the reaction among PVB, AN and TEOS.

scholarly journals Synthesis of Porous N-doped TiO2 by Using Peroxo Sol-Gel Method for Photocatalytic Reduction of Cd(II)

2021 ◽  
Vol 17 (1) ◽  
pp. 103-112
Author(s):  
Diana Vanda Wellia ◽  
Dina Nofebriani ◽  
Nurul Pratiwi ◽  
Safni Safni
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Photocatalytic Reduction ◽  
Gel Method ◽  
Doped Tio2 ◽  
Sol Gel Method ◽  
Catalytic Active Site ◽  
Bet Analysis

Porous N-doped TiO2 photocatalyst was successfully synthesized by an environmentally friendly peroxo sol-gel method using polyethylene glycol (PEG) as a templating agent. Here, the effect of PEG addition to the aqueous peroxotitanium solutions on the structure, pore properties and photocatalytic activity of the obtained photocatalysts was systematically studied. The prepared photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET). It was found that the doping of nitrogen narrows the band gap of TiO2 leading to enhance its visible-light response. The BET analysis shows that the prepared photocatalysts have a typical mesoporous structure with pore sizes of 3–6 nm. The photocatalytic activity of the prepared photocatalysts was evaluated by photocatalytic reduction of Cd(II) in an aqueous solution under visible light irradiation. The results show that porous N-doped TiO2 with the optimal PEG addition had the highest Cd(II) reduction of 85.1% after 2.5 h irradiation in neutral aqueous solution. This significant improvement in photocatalytic activity of the prepared photocatalysts was mainly attributed to the synergistic combination of N doping and porous structure, which could actively increase the catalytic active site of this photocatalysts. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

scholarly journals Nanocrystalline TiO2 and Halloysite clay mineral composite films prepared by sol-gel method: Synergistic effect and the case of silver modification to the photocatalytic degradation of Basic Blue- 41 azo dye in water.

2014 ◽  
Vol 16 (3) ◽  
pp. 485-498 ◽  
Keyword(s):  
Clay Mineral ◽  
Azo Dye ◽  
Sol Gel ◽  
Composite Films ◽  
Halloysite Nanotubes ◽  
Nanocomposite Films ◽  
Nanocrystalline Tio2 ◽  
Gel Method ◽  
Sol Gel Method ◽  
Glass Substrates

<div> <p>Tubular halloysite clay mineral and nanocrystalline TiO<sub>2 </sub>were incorporated in the preparation of nanocomposite films on glass substrates via sol-gel method at 450&ordm;C. The synthesis involves a simple chemical method employing nonionic surfactant molecule as pore directing agent along with the acetic acid-based sol-gel route without addition of water molecules. Drying and thermal treatment of composite films ensure elimination of organic material and lead to the formation of TiO<sub>2</sub> nanoparticles homogeneously distributed on the surface of the halloysite. Nanocomposite films without cracks of active anatase crystal phase and small crystallite size on halloysite nanotubes are characterized by microscopy techniques and porosimetry methods in order to examine their structural properties. The composite halloysite-TiO<sub>2 </sub>films with variable quantities of halloysite were examined as photocatalysts to the discoloration of Basic Blue 41 azo dye in water. These nanocomposite films proved to be very promising photocatalysts and highly effective to dye&rsquo;s discoloration in spite of small amount of halloysite/TiO<sub>2</sub> catalyst immobilized onto glass substrates. It also has been shown that the efficiency of the halloysite/TiO<sub>2</sub> films could be further improved when silver particles were deposited on their surface after successful adsorption from an aqueous solution of a silver salt and UV reduction of the adsorbed ions.</p> </div> <p>&nbsp;</p>

Preparation of nanospinels NiMnxFe2−xO4 using sol–gel method and their applications on removal of azo dye from aqueous solutions

2011 ◽  
Vol 130 (3) ◽  
pp. 1156-1161 ◽  
Author(s):  
Iman Khosravi ◽  
Mohammad Yazdanbakhsh ◽  
Elaheh K. Goharshadi ◽  
Abbas Youssefi
Keyword(s):  
Aqueous Solutions ◽  
Azo Dye ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Preparation of YBa2Cu3O7-δ Superconductor by Sol-Gel Method and Fiber Drawing

1988 ◽  
Vol 121 ◽  
Author(s):  
H. Kozuka ◽  
T. Umeda ◽  
J. S. Jin ◽  
S. Sakka
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Fiber Drawing ◽  
Gel Method ◽  
Sol Gel Method ◽  
Starting Solution ◽  
Electrical Conductivities ◽  
Viscous Solution ◽  
Acetate Aqueous Solution

ABSTRACTSuperconducting YBa2Cu3O7-δ, ceramic pieces and fibers were prepared through a sol-gel route from ametal acetate aqueous solution of controlled pH. Concentrating the starting solution by evaporating the solvent provided a transparent viscous sol, from which gel fibers could be drawn. Further concentrating of the viscous solution led to formation of gel pieces. Conversion of gel fibers and pieces to superconductors were investigated in terms of precipitating crystalline species and electrical conductivities.

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