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

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 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). 

Synthesis of a hierarchically porous niobium phosphate monolith by a sol–gel method for fructose dehydration to 5-hydroxymethylfurfural

2018 ◽  
Vol 8 (14) ◽  
pp. 3675-3685 ◽  
Author(s):  
Da-Ming Gao ◽  
Bohan Zhao ◽  
Haichao Liu ◽  
Kei Morisato ◽  
Kazuyoshi Kanamori ◽  
...  
Keyword(s):  
Phase Separation ◽  
Solid Acid ◽  
Sol Gel ◽  
Gel Method ◽  
Hierarchically Porous ◽  
Sol Gel Method ◽  
Hierarchically Porous Structure ◽  
New Type ◽  
Niobium Phosphate ◽  
Fructose Dehydration

A new type of niobium phosphate (NbP) with a hierarchically porous structure was synthesised via a sol–gel method accompanied by phase separation and effectively acted as a solid acid for fructose dehydration to HMF.

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.

Antiviral and Antibacterial Effects of Silver-Doped TiO2 Prepared by the Peroxo Sol-Gel Method

2019 ◽  
Vol 19 (11) ◽  
pp. 7356-7362 ◽  
Author(s):  
Benjawan Moongraksathum ◽  
Min-Yuan Chien ◽  
Yu-Wen Chen
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Influenza A ◽  
Sol Gel ◽  
Weight Ratio ◽  
Antibacterial Activities ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method

A series of multifunctional silver-doped titanium dioxide (Ag/TiO2) nanocomposites with various silver contents were synthesized by the peroxo sol–gel method using TiCl4 as a precursor and H2O2 as a peptizing agent. The sol was used to coat a glass substrate, thereby forming a thin film. The antiviral and antibacterial activities of the Ag/TiO2 films and their use in the photocatalytic degradation of an aqueous solution of methylene blue were investigated. The as-prepared materials were characterized using high-resolution transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The antiviral and antibacterial activities of the samples were tested against Escherichia coli, the influenza A virus (H1N1), and enterovirus. It was observed that an optimum Ag:TiO2 weight ratio of 1:100 enabled the highest activity in the photocatalytic degradation of an aqueous solution of methylene blue under irradiation with either ultraviolet or visible light. Moreover, the same composition remarkably exhibited extremely high antibacterial and virucidal effectivenesses greater than 99.99% against E. coli and infectious viruses after illumination with ultraviolet A. The presence of silver on TiO2 significantly enhanced its photocatalytic activity. Thus, the excellent photocatalytic activities and reusability of the Ag/TiO2 nanocomposite render it applicable as a coating material for several purposes.

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