Preparation and characterization of poly(styrenemethacrylic acid)/MCM-41 core/shell nanocomposite microspheres

AbstractIn acidic media, poly(styrene-methacrylic acid)/MCM-41 [P(St- MAA)/MCM-41] core/shell microspheres were synthesized using monodisperse P(St-MAA) particles contained in soap-free emulsion and cetyltrimethylammonium bromide as co-templates by adsorption self-assembly method. The effects of P(St- MAA) composition on shell structure of the core/shell microspheres were investigated. The morphology and composition of P(St-MAA)/MCM-41 microspheres were characterized by TEM, XRD and FTIR. The results show that the ordering degree of MCM-41 shells increased as the molar ratio of MAA to St increased. When n(MAA)/n(St) is 0.2, the average diameter and the shell thickness of nanocomposite microspheres are about 170 nm and 20 nm, respectively.

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Synthesis and Characterization of Polyaniline Microspheres Doped with Ferrocene Sulfonic Acid

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.215 ◽

2007 ◽

Vol 121-123 ◽

pp. 215-218

Author(s):

Dan Ming Chao ◽

J.Y. Chen ◽

Xiao Feng Lu ◽

Wan Jin Zhang

Keyword(s):

Electron Microscopy ◽

Self Assembly ◽

Sulfonic Acid ◽

Average Diameter ◽

Ammonium Persulfate ◽

Molar Ratio ◽

Assembly Method ◽

Transmission Electron ◽

Backbone Structure

With an average diameter of 300-500 nm, conducting microspheres of polyaniline (PANI) were synthesized successfully by a self-assembly method in the presence of ferrocene sulfonic acid (FcSO3H) as the dopant, and ammonium persulfate ((NH4)2S2O8) as the oxidant. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) proved that the microspheres of PANI- FcSO3H synthesized by a self-assembly process were hollow ones. And the backbone structure of obtained PANI- FcSO3H was characterized by FTIR spectrum. The effect of synthetic conditions, such as the molar ratio of FcSO3H to aniline (An) and the reaction temperature, on the morphology and size was also investigated.

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Synthesis and Characterization of Polyaniline Nanotubes Doped with Amino Acetic Acid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.184-185.1285 ◽

2012 ◽

Vol 184-185 ◽

pp. 1285-1288 ◽

Cited By ~ 1

Author(s):

Xue Lian Bai ◽

Jian Ting Mei ◽

Yun Bai ◽

Zhong Guo Mu

Keyword(s):

Acetic Acid ◽

Self Assembly ◽

Ammonium Persulfate ◽

Molar Ratio ◽

X Ray Diffraction ◽

X Ray ◽

Structure And Property ◽

Assembly Method ◽

Doped Polyaniline

Doped polyaniline (PANI) nanostructure has been prepared at room temperature using amino acetic acid (AA) as dopant and ammonium persulfate (APS) as oxidant by a self-assembly method. The structure and property of polyaniline nanostructure were characterized by SEM, TEM，IR and X-ray diffraction (XRD) and applying the 4 probes method. The results showed the production was PANI. The effect of molar ratio of AA to An affected the morphology of the product and room template conductivity of the products were studied.

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Characterization of nanosized Tb–MCM-41 synthesized by the sol–gel-assisted self-assembly method

Journal of Alloys and Compounds ◽

10.1016/s0925-8388(03)00304-9 ◽

2003 ◽

Vol 360 (1-2) ◽

pp. 231-235 ◽

Cited By ~ 8

Author(s):

Wei Yin ◽

Maisheng Zhang

Keyword(s):

Self Assembly ◽

Sol Gel ◽

Assembly Method ◽

Mcm 41

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Synthesis and Characterization of Bio-Active GFP-P4VP Core–Shell Nanoparticles

Catalysts ◽

10.3390/catal10060627 ◽

2020 ◽

Vol 10 (6) ◽

pp. 627

Author(s):

Erik Sarnello ◽

Yuzi Liu ◽

Bethany Palen ◽

Elaine Sun ◽

Xiaobing Zuo ◽

...

Keyword(s):

Self Assembly ◽

Core Protein ◽

Core Shell ◽

Shell Nanoparticles ◽

Assembly Method ◽

Synthetic Materials ◽

Transmission Electron ◽

Core Shell Nanoparticles ◽

Enzyme Functionality

Bioactive core–shell nanoparticles (CSNPs) offer the unique ability for protein/enzyme functionality in non-native environments. For many decades, researchers have sought to develop synthetic materials which mimic the efficiency and catalytic power of bioactive macromolecules such as enzymes and proteins. This research studies a self-assembly method in which functionalized, polymer-core/protein-shell nanoparticles are prepared in mild conditions. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques were utilized to analyze the size and distribution of the CSNPs. The methods outlined in this research demonstrate a mild, green chemistry synthesis route for CSNPs which are highly tunable and allow for enzyme/protein functionality in non-native conditions.

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Preparation and Characterization of Polyaniline Nanotubes Doped with Different Acid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.401-403.663 ◽

2013 ◽

Vol 401-403 ◽

pp. 663-666

Author(s):

Xue Lian Bai ◽

Jian Ting Mei ◽

Zhong Guo Mu ◽

Yun Bai

Keyword(s):

Acetic Acid ◽

Self Assembly ◽

Ammonium Persulfate ◽

Tetraacetic Acid ◽

X Ray Diffraction ◽

X Ray ◽

Structure And Property ◽

Assembly Method ◽

Polyaniline Nanotubes

Polyaniline (PANI) nanotubes were synthesized separately using amino acetic acid (AA), ethylenediamine tetraacetic acid (EDTA), oxalic acid (OA) as dopant and ammonium persulfate (APS) as oxidant by a self-assembly method. SEM, TEM,FTIR and X-ray diffraction (XRD) and applying the 4 probes method characterized the morphology, structure and property of the product. It was found that nanotubes morphology were synthesized when the [Aci/[A ratio is 1:2.The room template conductivity of the products were studied.

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Ag–Au Core–Shell Triangular Nanoprisms for Improving p-g-C3N4 Photocatalytic Hydrogen Production

Nanomaterials ◽

10.3390/nano11123347 ◽

2021 ◽

Vol 11 (12) ◽

pp. 3347

Author(s):

Yali Guo ◽

Anzhou Xu ◽

Juan Hou ◽

Qingcui Liu ◽

Hailong Li ◽

...

Keyword(s):

Hydrogen Production ◽

Self Assembly ◽

Rational Design ◽

Photogenerated Electron ◽

Core Shell ◽

Co Catalyst ◽

Replacement Method ◽

Assembly Method ◽

Free Replacement ◽

Electron Holes

Ag–Au core–shell triangular nanoprisms (Ag@Au TNPs) have aroused extensive research interest in the field of hydrogen evolution reaction (HER) due to their strong plasmon effect and stability. Here, Ag@Au TNPs were fabricated by the galvanic-free replacement method. Then, we loaded them on protonated g-C3N4 nanoprisms (P–CN) by the electrostatic self-assembly method as an efficient plasmonic photocatalyst for HER. The hydrogen production rate of Ag@Au TNPs/P–CN (4.52 mmol/g/h) is 4.1 times higher than that of P–CN (1.11 mmol/g/h) under simulated sunlight irradiation, making it the most competitive material for water splitting. The formed Schottky junction helps to trap the hot electrons generated from Ag@Au TNPs, and the well-preserved tips of the Ag@Au TNPs can effectively generate an electromagnetic field to inhibit the photogenerated electron–holes pairs recombination. This study suggests that the rational design of Ag@Au TNPs by the galvanic-free replacement method is an effective co-catalyst for HER and boosting the additional combination of plasmonic metals and catalyst metals for the enhancement to HER.

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