Facile preparation of stable palygorskite/cationic red X-GRL@SiO2“Maya Red” pigments

RSC Advances ◽  
2014 ◽  
Vol 4 (108) ◽  
pp. 63485-63493 ◽  
Author(s):  
Ling Fan ◽  
Yujie Zhang ◽  
Junping Zhang ◽  
Aiqin Wang
Keyword(s):  
Red Pigments ◽  
Stöber Method ◽  
Facile Preparation ◽  
Modified Stöber Method ◽  
Hydrolysis And Polycondensation

We report the fabrication of stable “Maya Red” pigments with a purple-red hue by adsorption of cationic red X-GRL (CR-XGRL) onto palygorskite, which is followed by hydrolysis and polycondensation of tetraethoxysilaneviaa modified Stöber method to form a layer of SiO2.

scholarly journals Effect of Ethanol on Ag@Mesoporous Silica Formation by In Situ Modified Stöber Method

Nanomaterials ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 362 ◽  
Author(s):  
Qian Chen ◽  
Yanling Ge ◽  
Henrika Granbohm ◽  
Simo-Pekka Hannula
Keyword(s):  
Mesoporous Silica ◽  
Stöber Method ◽  
Modified Stöber Method

Synthesis of nitrogen-doped carbon spheres using the modified Stöber method for supercapacitors

2019 ◽  
Vol 13 (2) ◽  
pp. 156-164
Author(s):  
Meng Liu ◽  
Lei Liu ◽  
Yifeng Yu ◽  
Haijun Lv ◽  
Aibing Chen ◽  
...  
Keyword(s):  
Carbon Spheres ◽  
Stöber Method ◽  
Nitrogen Doped ◽  
Modified Stöber Method ◽  
Nitrogen Doped Carbon

Core–Shell Fe@SiO2 Nanoparticles Synthesized via Modified Stober Method for High Activity in Cr(VI) Reduction

2018 ◽  
Vol 18 (10) ◽  
pp. 6867-6872 ◽  
Author(s):  
Van Thi Thanh Ho ◽  
Nguyen Vu Hoa Hong ◽  
At Van Nguyen ◽  
Long Giang Bach ◽  
Tuan Phan Dinh
Keyword(s):  
High Activity ◽  
Sio2 Nanoparticles ◽  
Core Shell ◽  
Stöber Method ◽  
Modified Stöber Method

Responsive P(NIPAM-co-AA) Particle-Functionalized Magnetic Microspheres

2014 ◽  
Vol 67 (1) ◽  
pp. 134 ◽  
Author(s):  
Yiheng Wang ◽  
Mengge Xia ◽  
Yongtao Wu ◽  
Meifang Zhu
Keyword(s):  
Magnetic Microspheres ◽  
Core Shell ◽  
The Novel ◽  
Shell Nanoparticles ◽  
Stöber Method ◽  
Preparation Conditions ◽  
Amidation Reaction ◽  
Modified Stöber Method ◽  
Core Shell Nanoparticles ◽  
Seed Emulsion Polymerization

Functionalized magnetic microspheres were prepared by anchoring cross-linked core–shell poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAM-co-AA)) nanoparticles onto silica-coated magnetic microspheres (Fe3O4@SiO2). First, the smaller polystyrene/P(NIPAM-co-AA) core–shell nanoparticles were synthesized through seed emulsion polymerization and adhered to the surface of amino-modified Fe3O4@SiO2 micorspheres, which were made using the modified Stöber method through electrostatic interaction under appropriate preparation conditions. An amidation reaction between the carboxylic and amino groups on the respective surfaces was then catalyzed. Finally, the novel architecture magnetic microspheres with multiresponsive functionalities were obtained, and their polymerization conditions, environmental sensitivity, and magnetic properties were discussed and optimized. The superparamagnetism and temperature/pH dual responsivity and excellent dispersibility of the P(NIPAM-co-AA) functionalized magnetic microspheres provide them with high potential to be used in the fields of controlled drug delivery, bioseparation, and catalysis.

Preparation of structurally colored films assembled by using polystyrene@silica, air@silica and air@carbon@silica core–shell nanoparticles with enhanced color visibility

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 37535-37543 ◽  
Author(s):  
Fen Wang ◽  
Xin Zhang ◽  
Jianfeng Zhu ◽  
Ying Lin
Keyword(s):  
Core Shell ◽  
Shell Nanoparticles ◽  
Stöber Method ◽  
Silica Core ◽  
Modified Stöber Method ◽  
Core Shell Nanoparticles

Polystyrene@silica (PS@SiO2) core–shell nanospheres were synthesized using a surfactant free method followed by a modified Stöber method in the research reported in this paper.

Preparation of amine free silica-coated Agl nanoparticles with modified Stöber method

2008 ◽  
Vol 24 (4) ◽  
pp. 248-252 ◽  
Author(s):  
Y. Kobayashi ◽  
N. Shimizu ◽  
K. Misawa ◽  
M. Takeda ◽  
N. Ohuchi ◽  
...  
Keyword(s):  
Stöber Method ◽  
Free Silica ◽  
Modified Stöber Method

Hybrid silica bearing different organosilanes produced by the modified Stöber method

2016 ◽  
Vol 301 ◽  
pp. 486-492 ◽  
Author(s):  
Eliana Galland Barrera ◽  
Paolo R. Livotto ◽  
João H.Z. dos Santos
Keyword(s):  
Stöber Method ◽  
Hybrid Silica ◽  
Modified Stöber Method

Effect of Annealing on Ag-Doped Submicron Silica Powder Prepared with Modified Stöber Method

2011 ◽  
Vol 695 ◽  
pp. 449-452 ◽  
Author(s):  
Juha Larismaa ◽  
Toni Honkanen ◽  
Yan Ling Ge ◽  
Outi Söderberg ◽  
Michael Friman ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Average Particle Size ◽  
Silica Particles ◽  
Metallic Silver ◽  
Steady Increase ◽  
Average Particle ◽  
Stöber Method ◽  
Prepared Powder ◽  
Modified Stöber Method ◽  
Micro Organisms

Antibacterial silver can be used against such micro-organisms as bacteria and molds. When Ag nanoparticles are attached to an inorganic carrier, e.g., silica long-term antimicrobial functionality can be gained. Such Ag-SiO2particles are potential for water purification or bactericidal applications. In this work, submicron sized silica particles doped with Ag were prepared by the modified Stöber method. The as-prepared powder was air-dried and annealed for 75 minutes at 573, 673, 773, 873, 973, 1073, 1173, or 1273 K in air. The powders were studied by DSC/TGA, XRD, SEM, TEM and UV-vis methods. The as-prepared powder consisted of round silica particles having size around several hundred nanometers. XRD and SEM studies confirmed that the powder consisted of metallic silver nanoparticles on the submicron silica surface after annealing at 873 K or higher. According to the SEM study the silver particles had an average particle size between 19-400 nm depending on the annealing temperature. DSC was used to determine the phase transformation temperatures. After annealing the Ag-SiO2powder at 873 K the TEM study suggested that the silver had crystalline structure. The XRD studies confirmed that silver appeared as a FCC crystal structure. The UV-vis measurements of Ag-SiO2powder annealed at and below 773 K showed a steady increase in absorption with decreasing wavelength without absorption peaks. Annealing at 873 K and above resulted in a strong peak in between 404 nm and 416 nm. This peak can be attributed to the surface plasmon resonance of silver nanoparticles.

Synthesis of Monodisperse Silica Microspheres by a Modified Stöber Method

2014 ◽  
Vol 154 (1) ◽  
pp. 142-146 ◽  
Author(s):  
Xue Lei ◽  
Bing Yu ◽  
Hai-Lin Cong ◽  
Chao Tian ◽  
Yue-Zhong Wang ◽  
...  
Keyword(s):  
Silica Microspheres ◽  
Stöber Method ◽  
Monodisperse Silica ◽  
Modified Stöber Method

Synthesis and Photophysical Properties of Core–Shell Eu(DBM)3phen/TiO2 Nanohybrids

2008 ◽  
Vol 8 (3) ◽  
pp. 1464-1467 ◽  
Author(s):  
Weiping Qin ◽  
Dan Zhao ◽  
Jisen Zhang ◽  
Jishuang Zhang ◽  
Yan Wang ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Experimental Results ◽  
Core Shell ◽  
Complex Surfaces ◽  
Stöber Method ◽  
The Core ◽  
Ultraviolet Excitation ◽  
Modified Stöber Method ◽  
The Eu

The core–shell titania (TiO2) hybrid spheres embedded with tris(dibenzoylmethanato)phenanthroline [Eu-(DBM)3phen] complex clusters were fabricated by a modified Stöber method. Under ultraviolet excitation (355 nm), the hybrid spheres exhibit the characteristic luminescence of the Eu3+ ions. The experimental results indicate that the titanic shell has different influences on the two fluorescent centers of Eu3+ ions. The emission from the centers on the complex surfaces was greatly enhanced when incorporated into titania spheres.

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