One-Step Preparation of Pd-SiO2 Composite Microspheres by the Sol–Gel Process in a Microchannel

2014 ◽  
Vol 53 (26) ◽  
pp. 10660-10666 ◽  
Author(s):  
Jiahui Li ◽  
Hongbao Yao ◽  
Yujun Wang ◽  
Guangsheng Luo
Keyword(s):  
Sol Gel ◽  
Composite Microspheres ◽  
Sol Gel Process ◽  
One Step

scholarly journals Carbon Quantum Dots Encapsulated Molecularly Imprinted Fluorescence Quenching Particles for Sensitive Detection of Zearalenone in Corn Sample

Toxins ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 438 ◽  
Author(s):  
Manyu Shao ◽  
Ming Yao ◽  
Sarah De Saeger ◽  
Liping Yan ◽  
Suquan Song
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Sol Gel ◽  
Carbon Quantum Dots ◽  
Detection Range ◽  
Molecularly Imprinted ◽  
Relative Standard ◽  
Sol Gel Process ◽  
One Step ◽  
Optimized Conditions

An eco-friendly and efficient one-step approach for the synthesis of carbon quantum dots (CDs) that encapsulated molecularly imprinted fluorescence quenching particles (MIFQP) and their application for the determination of zearalenone (ZEA) in a cereal sample are described in this study. CDs with high luminescence were first synthesized, and then encapsulated in the silica-based matrix through a non-hydrolytic sol-gel process. The resulting ZEA-imprinted particles exhibited not only an excellent specific molecular recognition of ZEA, but also good photostability and obvious template binding-induced fluorescence quenching. Under the optimized conditions, the fluorescence intensity of MIFQP was inversely proportional to the concentration of ZEA. By validation, the detection range of these fluorescence quenching materials for ZEA was between 0.02 and 1.0 mg L−1, and the detection limit was 0.02 mg L−1 (S/N = 3). Finally, the MIFQP sensor was successfully applied for ZEA determination in corn with recoveries from 78% to 105% and the relative standard deviation (RSD %) was lower than 20%, which suggests its potential in actual applications.

Organic–inorganic hybrids having a talc-like structure as suitable hosts to guest a wide range of species

2018 ◽  
Vol 47 (9) ◽  
pp. 2925-2932 ◽  
Author(s):  
J. Brendlé
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Step Method ◽  
Mild Conditions ◽  
Condensation Reactions ◽  
Wide Range ◽  
Sol Gel Process ◽  
Hydrolysis And Condensation ◽  
One Step

The sol–gel process involving hydrolysis and condensation reactions is an attractive way to form siloxane based hybrid materials since it is a one-step method performed under mild conditions.

One-Step Preparation of Viologen-TiO2 Nanoparticles via a Hydrothermally Assisted Sol-Gel Process for Use in Electrochromic Films and Devices

2018 ◽  
Vol 35 (11) ◽  
pp. 1800142 ◽  
Author(s):  
Ana Viñuales ◽  
Bettina Herbig ◽  
Yolanda Alesanco ◽  
Jesús Palenzuela ◽  
Javier Rodriguez ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Sol Gel Process ◽  
One Step

Study on Preparation and Hydrophobicity of MTES Derived Silica Sol and Gel

2012 ◽  
Vol 535-537 ◽  
pp. 2563-2566 ◽  
Author(s):  
Yu Ma ◽  
Hye Ryeon Lee ◽  
Toshinori Tsuru
Keyword(s):  
Reaction Rate ◽  
Sol Gel ◽  
Phase Segregation ◽  
Silica Sol ◽  
Molar Ratio ◽  
Modified Silica ◽  
Sol Gel Process ◽  
One Step ◽  
Inorganic Precursors

The synthesis of hydrophobic sol by one-step sol-gel process ammonia catalyzed was investigated. The water molar ratio and catalyst molar ratio were discussed to prevent phase segregation during the hydrolysis and co-condensation of the organic and inorganic precursors. The reactant system with water molar ratio 70 could make the reaction rate of MTES slightly less than that of TEOS, so that the hydrolysis - condensation – gelling reaction with MTES and TEOS as co-precursors could be synchronously. With the increase of the MTES/TEOS molar ratio, the reaction rate of the silica sol preparation decreased, the hydrophobicity of the sol and gel increased as the molar ratio MTES/TEOS change from 0.5~4. But the hydrophobicity of the methyl-modified silica sol and gel prepared with pure MTES in the sol-gel process were slightly lower than that of the methyl-modified silica sol and gel prepared with MTES and TEOS as co-precursors.

Growth of ZnO nanorod arrays by one-step sol–gel process

2016 ◽  
Vol 80 (2) ◽  
pp. 389-395 ◽  
Author(s):  
Ferhat Aslan ◽  
Ahmet Tumbul ◽  
Abdullah Göktaş ◽  
Refika Budakoğlu ◽  
İbrahim Halil Mutlu
Keyword(s):  
Sol Gel ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Sol Gel Process ◽  
One Step

Polyurethane-silica hybrid foams from a one-step foaming reaction, coupled with a sol-gel process, for enhanced wound healing

2017 ◽  
Vol 79 ◽  
pp. 866-874 ◽  
Author(s):  
Eun-Ho Song ◽  
Seol-Ha Jeong ◽  
Ji-Ung Park ◽  
Sukwha Kim ◽  
Hyoun-Ee Kim ◽  
...  
Keyword(s):  
Wound Healing ◽  
Sol Gel ◽  
Sol Gel Process ◽  
One Step ◽  
Hybrid Foams ◽  
Silica Hybrid

scholarly journals Structural Colors Based on Amorphous Arrays Comprised Solely of Silica Particles

2020 ◽  
Vol 10 (1) ◽  
pp. 420
Author(s):  
Dae-San Choi ◽  
Ju-Hwan Choi ◽  
Chang-Yull Lee
Keyword(s):  
Phenol Formaldehyde ◽  
Sol Gel ◽  
Silica Particles ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Structural Colors ◽  
Convection Oven ◽  
Sol Gel Process ◽  
One Step ◽  
The Stöber Method

In this study, structural colors were fabricated by producing an amorphous array with atypical silica particles. The colors were controlled by an array of silica particles with different sizes. In previous research, the process required inducement of the amorphous array, which was complex. Meanwhile, in this paper, we proposed a simple one-step process. First, spherical silica nanoparticles were synthesized using the sol-gel process of the Stöber method. Atypical silica particles that induced an amorphous array were produced by adding a small amount of phenol-formaldehyde resin. Subsequently, the colloidal silica was converted to a powder using a convection oven. The characteristics of the synthesized silica particles were confirmed using a scanning electron microscope (SEM). All the synthesized silica powders obtained structural colors. Finally, the silica powders were dispersed in deionized (DI) water and coated on a glass slide. We confirmed that the silica particles showed different structural colors depending on the size of the particles. We also found that the color was highly independent of the viewing angle.

One-Step Assembly of TiO2–Liposomes Based on Interfacial Sol–Gel Process within Lipid Bilayer

Langmuir ◽  
2019 ◽  
Vol 35 (21) ◽  
pp. 7018-7025 ◽  
Author(s):  
Rui Zhang ◽  
Xuefei Li ◽  
Meijing Li ◽  
Xiaobang Liu ◽  
Shukun Shen ◽  
...  
Keyword(s):  
Lipid Bilayer ◽  
Sol Gel ◽  
Sol Gel Process ◽  
One Step

scholarly journals CO2 Hydrogenation to Methanol with Ga- and Zn-Doped Mesoporous Cu/SiO2 Catalysts Prepared by the Aerosol-Assisted Sol-Gel Process

2020 ◽  
Author(s):  
Charlie Paris ◽  
Alejandro Karelovic ◽  
Raydel Manrique ◽  
Solène Le Bras ◽  
François Devred ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Continuous Production ◽  
Sol Gel ◽  
Active Phase ◽  
High Specific Surface Area ◽  
Silica Matrix ◽  
Promoting Effect ◽  
Process Step ◽  
Sol Gel Process ◽  
One Step

The preparation of copper-based heterogeneous catalysts dedicated to the hydrogenation of CO2 to methanol typically relies on multi-step procedures carried out in batch. These steps are precisely tailored to introduce the active phase (Cu) and the promoters (e.g. zinc, gallium) onto a preformed support, to maximize catalyst performance. However, each process step – often carried out in batch – can be associated with the formation of waste and with the consumption of energy, thereby negatively impacting the environmental performance of the overall catalyst preparation procedure. Here, we propose a direct and continuous production process for the synthesis of efficient catalysts for the CO2 to methanol reaction. Gallium- and zinc-promoted mesoporous Cu-SiO2 catalysts are prepared in one step by the aerosol-assisted sol-gel process. The catalysts consist of spherical microparticles and feature high specific surface area and pore volume, with interconnected pores of about 6 nm. A strong promoting effect of Ga and Zn is highlighted, boosting the selectivity for methanol at the expense of CO. Upon calcination, we show that Cu species – initially trapped in the silica matrix – undergo a migration towards the catalyst surface and a progressive sintering. After optimization, the catalysts obtained via such direct route compete with the best catalysts reported in the literature and obtained via multi-step approaches. <br>

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