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Browsing by Subject "Nanomaterials"

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Amplification of the discharge current density of lithium-ion batteries with spinel phase Li(PtAu)0.02Mn1.98O4 nano-materials

Author: Ross, N ; Iwuoha, EI ; Ikpo, CO ; Baker, P ; Njomo, N ; Mailu, SN ; Masikini, M ; Matinise, N ; Tsegaye, A ; Mayedwa, N ; Waryo, T ; Ozoemena, KI ; Williams, A Date: May 2014 In this study the synergistic and catalytic properties of a novel nano-composite cathode material of nominal composition Li(M)(subx)Mn(sub2-x)O(sub4) (M = Pt-Au; x # 0.2) has been explored. Li(PtAu)xMn(sub2-x)O4 nanomaterial for use in ... Read more
Assessment of the effect of nanomaterials on sediment-dwelling invertebrate Chironomustentans larvae

Author: Oberholster, Paul J ; Musee, N ; Botha, A-M ; Botha, PK ; Focke, WW ; Ashton, PJ Date: Mar 2011 Studies were conducted to determine the effects of a panel of seven nanomaterials (NMs), namely: a-alumina, -alumina, precipitated silica; silica fume, calcined silica fume, colloidal antimony pentoxide (Sb2O5), and superfine amorphous ferric ... Read more
Cellulose nanomaterials: New generation materials for solving global issues

Author: Mokhena, Teboho C ; John, Maya J Date: Feb 2020 This review describes the recent advances in the production and application of cellulose nanomaterials. Cellulose nanomaterials (CNMs), especially cellulose nanocrystals and cellulose nanofibers, can be produced using different preparation ... Read more
Chemical sensor nanotechnology in pharmaceutical drug research

Author: Thobakgale, Setumo L ; Ombinda-Lemboumba, Saturnin ; Mthunzi-Kufa, Patience Date: Aug 2022 The increase in demand for pharmaceutical treatments due to pandemic-related illnesses has created a need for improved quality control in drug manufacturing. Understanding the physical, biological, and chemical properties of APIs is an important ... Read more
A classification and ranking system on the H2 gas sensing capabilities of nanomaterials based on proposed coefficients of sensor performance and sensor efficiency equations

Author: Mwakikunga, Bonex W ; Motshekga, S ; Sikhwivhilu, L ; Moodley, M ; Scriba, Manfred R ; Malgas, G ; Simo, A ; Maaza, M ; Ray, Suprakas S Date: Jul 2013 A coefficient of performance is defined based on the traditional definitions of response, S, of a chemoresistive sensing material to a specific gas from resistance–time data. The new definition not only considers the S(sub response) and S(sub ... Read more
Conventional wet impregnation versus microwave-assisted synthesis of SnO2/CNT composites

Author: Motshekga, S ; Kesavan Pillai, Sreejarani ; Ray, SS Date: Mar 2011 Carbon nanotubes decorated with SnO2 nanoparticles were prepared by conventional and microwave-assisted wet impregnation. The composites were thoroughly characterized by X-ray diffraction, Raman spectroscopy, BET-surface area measurement, ... Read more
Effects of catalyst-support materials on the performance of fuel cells

Author: Ejikeme, PM ; Makgopa, K ; Ozoemena, KI Date: Jul 2016 The operating life of a fuel cell is expected to be thousands of hours. One of the critical components of the fuel cell that will allow for such long-life cycle is the catalyst-support material. The support material is expected, amongst others, ... Read more
Emerging nanostructured materials for energy and environmental science

Author: Rajendran, S ; Naushad, M ; Raju, Kumar ; Boukherroub, R Date: 2019 This book provides the fundamental aspects of the diverse ranges of nanostructured materials (0D, 1D, 2D and 3D) for energy and environmental applications in a comprehensive manner written by specialists who are at the forefront of research ... Read more
Estimated risk profiles of titanium dioxide and carbon nanotubes engineered nanomaterials (enms) in the Gauteng province environment

Author: Nota, N ; Musee, N ; Aldrich, C Date: Sep 2010 This paper presents findings on the quantification of potential risks posed by nTiO2 and CNTs to the aquatic and terrestrial ecosystems. The risk quotient (RQ) was calculated as a ratio of modelled predicted environmental concentrations (PEC) ... Read more
Exploring optical spectroscopic techniques and nanomaterials for virus detection

Author: Manoto, Sello L ; El-Hussein, A ; Malabi, Rudzani ; Thobakgale, Setumo L ; Ombinda-Lemboumba, Saturnin ; Attia, YA ; Kasem, MA ; Mthunzi-Kufa, Patience Date: Aug 2020 Viral infections pose significant health challenges globally by affecting millions of people worldwide and consequently resulting in a negative impact on both socioeconomic development and health. Corona virus disease 2019 (COVID-19) is a ... Read more
Fabrication and characterization of various engineered nanomaterials

Author: Mtibe, Asanda ; Mokhothu, Thabang H ; John, Maya J ; Mokhena, Teboho C ; Mochane, MJ Date: Aug 2018 In recent years, there has been growing demand of utilizing nanomaterials to develop new sustainable products. Nanomaterials offer unique extraordinary properties such as high surface area, eco-friendliness and good mechanical and physical ... Read more
Field emission characteristics of SnO2/CNT composite prepared by microwave assisted wet impregnation

Author: Kesavan Pillai, Sreejarani ; Motshekga, SC ; Ray, SS ; Kennedy, J Date: 2012 SnO2/CNT composites were prepared by microwave assisted wet impregnation at 60 °C. The process was optimized by varying the microwave power and reaction time. Raman analysis showed the typical features of the rutile phase of as-synthesized ... Read more
Gelatine-based biosensor for molecular screening of aspirin and paracetamol via surface enhanced Raman spectroscopy

Author: Thobakgale, Setumo L ; Manoto, Sello L ; Ombinda-Lemboumba, Saturnin ; Mthunzi-Kufa, Patience Date: Feb 2020 Polypeptide gelatine has been used extensively in microbiology to enhance cellular adhesion and growth. Likewise, fabrication of biochemical sensors using a variety of organic material and nanomaterials is a growing research area particularly ... Read more
Graphene for enhanced embryonic stem cell photo-transfection efficiency

Author: Mthunzi-Kufa, Patience ; He, K ; Warner, JW Date: Apr 2013 Due to their pluripotency properties, embryonic stem (ES) cells possess great potential in regenerative therapy. Since reported a promising tissue engineering scaffold material, here, graphene is demonstrated to significantly improve the ES ... Read more
Microstructure and corrosion behavior of laser synthesized cobalt based powder on Ti-6Al-4V

Author: Adesina, OS ; Popoola, API ; Pityana, Sisa L ; Oloruntoba, DT Date: 2018 The corrosion behavior of titanium alloys when used for various dynamic offshore components has been a major concern of titanium drilling risers in deepwater energy extraction. A way of achieving specified requirement is the development of ... Read more
Nafion titania nanotubes nanocomposite electrolytes for high-temperature direct methanol fuel cells

Author: Cele, NP ; Ray, Suprakas S ; Sikhwivhilu, L Date: 2012 Nafion-based nanocomposite membranes containing various amounts of titania nanotubes (TNTs) as an inorganic filler have been prepared using melt-mixing method and have been investigated for proton exchange membrane applications. The one-dimensional ... Read more
Nanomaterials for fuel cell catalysis

Author: Ozoemena, KI ; Chen, S Date: 2016 Global experts provide an authoritative source of information on the use of electrochemical fuel cells, and in particular discuss the use of nanomaterials to enhance the performance of existing energy systems. The book covers the state of the ... Read more
Nanomaterials in Advanced Batteries and Supercapacitors

Author: Ozoemena, Kenneth I ; Chen, S Date: 2016 This book provides an authoritative source of information on the use of nanomaterials to enhance the performance of existing electrochemical energy storage systems and the manners in which new such systems are being made possible. The book ... Read more
Nanopollutants, their effects on the environment, and potential impacts on the South African water treatment and supply infrastructure

Author: Roux, SP Date: Nov 2008 Nanotechnology research and development is rapidly expanding into a full-scale industry that includes building materials, automotive parts, sports equipment and consumer products. This technology promises significant technological advantages, ... Read more
Nanotoxicology: A review

Author: Walters, Chavon R ; Pool, E ; Somerset, V Date: Oct 2016 Nanotoxicology represents a new and growing research area in toxicology. It deals with the assessment of the toxicological properties of nanoparticles (NPs) with the intention of determining whether (and to what extent) they pose an environmental ... Read more

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