Current Understanding of Formation Mechanisms in Surfactant-Templated Materials

2005 ◽  
Vol 58 (9) ◽  
pp. 627 ◽  
Author(s):  
Karen J. Edler
Keyword(s):  
Self Assembly ◽  
High Surface ◽  
High Surface Area ◽  
Formation Mechanisms ◽  
Surfactant Micelle ◽  
Surfactant Micelles ◽  
Molecular Separation ◽  
Inorganic Species ◽  
Templated Materials ◽  
High Surface Area Materials

Surfactant-templated materials are created through self-assembly in solutions containing both surfactant micelles and an inorganic species. The resulting materials are composites containing an organized surfactant micelle array encapsulated in the inorganic material. Removal of the surfactants generates nanoscale pores which replicate the highly organized micelle phase, producing high surface area materials with uniform pores that have applications in catalysis, molecular separation, encapsulation for sensors and slow release, and thin films for optoelectronics and photoelectrochemical devices. This review looks at recent work aimed at understanding how these materials self-assemble from dilute surfactant solutions to form intricate nanoscale configurations, which also often show complex and highly ordered structures on longer length scales.

Solution Combustion as a Promising Method for the Synthesis of Nanomaterials

2010 ◽  
Vol 63 ◽  
pp. 187-196 ◽  
Author(s):  
Alexander S. Mukasyan
Keyword(s):  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Solution Combustion ◽  
Gel Combustion ◽  
Fundamental Understanding ◽  
Continuous Technology ◽  
Combustion Processes ◽  
High Surface Area Materials ◽  
Synthesis Of Nanomaterials

Solution–combustion is an attractive approach to synthesis of nanomaterials for a variety of applications, including catalysts, fuel cells, and biotechnology. In this paper, several novel methods based on the combustion of a reactive solution are presented. These methods include selfpropagating sol-gel combustion and combustion of impregnated inert and active supports. It was demonstrated that, based on the fundamental understanding of the considered combustion processes, a variety of extremely high surface area materials could be synthesized. The controlling process parameters are defined and discussed. Examples of materials synthesized by the above methods are presented. A continuous technology for production of nanopowders by using the solution combustion approach is also discussed.

Chromium Removal from Industrial Water Through Functionallized Nanoparticles

2008 ◽  
Vol 8 (11) ◽  
pp. 5733-5738 ◽  
Author(s):  
Xicoténcatl López ◽  
Victor M. Castaño
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Surface Functionalization ◽  
High Surface ◽  
High Surface Area ◽  
Chromium Removal ◽  
Industrial Water ◽  
Hazardous Metal ◽  
High Surface Area Materials

Cr ion-polluted industrial water was treated with commercial activated carbon and with either mercaptane- and amine-functionallized silica nanoparticles, revealing that the use of relatively low surface area materials can advantageously compete with high surface area materials, traditionally utilized for removing hazardous metal ions, provided a proper surface functionalization of the nanoparticles is in place. FTIR and SEM characterization of the different materials and stages of the experiments are provided, as well.

scholarly journals Electrochemical Determination of Famotidine in Real Samples Using rGO/Cu2O Nanocomposite Modified Carbon Paste Electrode

2022 ◽  
Author(s):  
Ali Afruz ◽  
Mandana Amiri ◽  
Hamideh Imanzadeh
Keyword(s):  
Carbon Paste Electrode ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemical Analysis ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Real Samples ◽  
Inorganic Species ◽  
Cu2o Nanoparticles ◽  
Paste Electrode

Abstract Here, we developed a sensitive electrochemical sensor for famotidine (FAT) using Cu2O nanoparticles and reduced graphene oxide (rGO) as a sensing platform. The Cu2O nanoparticles and rGO were synthesized through a simple process and characterized by versatile analytical methods. The prepared Cu2O nanoparticles and rGO were taken to modify the carbon paste electrode (Cu2O/rGO/CPE) and developed for the electrochemical analysis of the FAT at pH 6.0. Cu2O/rGO/CPE showed superior electrocatalytic activity for detecting FAT, attributed to the high surface area of rGO and the electrocatalytic properties of Cu2O nanoparticles. The designed FAT sensor exhibited two linear ranges from 0.1-3 µM and 3-50 µM with a detection limit of 0.08 µM (S/N=3) using a differential pulse voltammetry. The proposed sensor also showed a repeatable and stable response over one month with negligible interference from usual organic and inorganic species. The sensor was also validated measuring FAT in real samples (urine, serum and pharmaceutical tablet) with good recovery values from 99.6 to 110.9%.

Exploratory Investigation of Synthetic Zeolites by Near-Infrared Fourier-Transform Raman Microspectroscopy

1997 ◽  
Vol 3 (S2) ◽  
pp. 861-862
Author(s):  
Edgar S. Etz
Keyword(s):  
Surface Science ◽  
Near Infrared ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Standard Reference Materials ◽  
Structure Information ◽  
Synthetic Zeolites ◽  
High Surface Area Materials

Zeolites are complex, three-dimensional, hydrated crystalline aluminosilicates that have porous structures with channels or cages of various dimensions. In the simplest way they can be represented by (Na2,K,Ca,Ba) [(Al,Si)O2]nxH2O. They may be either of natural or synthetic origin. As high-surface-area materials, they take on great technological importance, foremost in surface science and catalysis. The structure of the zeolite is critical to its function. Structure information is commonly obtained by x-ray and neutron diffraction, NMR, IR, and Raman spectroscopy techniques. Synthetic zeolites are produced in enormous quantities worldwide and are key to critical technologies. Yet, no real zeolite standards exit that are defined and certified. NIST, with input from industry and academia, has begun a measurement program to certify various physico-chemical properties for a suite of synthetic zeolite powder standard reference materials (SRMs) and research materials (RMs). These proposed "standard" zeolite materials span a range of pore sizes, SiO2/Al2O3 ratios, ring sizes, structural building units, and cage sizes.

Sign in / Sign up

Export Citation Format

Share Document