The material combines the advantages of graphite and active carbon.
In the current study we explored routes to obtain dense carbon nanofibers bodies suitable as catalyst support.
SOME OF THE PROJECTS THAT HAVE BEEN CARRIED OUT IN OUR FACILITY
Biofilms are three-dimensional structures that contains billions of genetically identical bacteria submerged in a self-produced extracellular matrix, which protect bacteria from antibiotics and the human immunological defenses. More than 85 % of chronic and/or recurrent human infections are linked to bacterial biofilms. In addition, spore-forming pathogenic bacteria represent an additional community threat because of their intrinsic refractory behavior against antibiotics, phagocytes and their easy utilization in bioterrorist attacks. Therefore, every day the available microbicide arsenal against biofilms and spores becomes scarcer. Accordingly, nano-material biotechnology emerges as a promising alternative for reducing the detrimental effects of microbial-related diseases. Here we describe the development of novel nanostructured coating systems with improved photocatalytic and antibacterial activities. These systems comprise, in one case, layers of SiO2 followed by layers of mesoporous or dense TiO2-anatase, and doping with silver nanoparticles (Ag NPs). In the other case, we developed Copper NPs and its oxides by a chemical method based on a bottom up approach and its stabilization using aminosilanes as surface modifiers. The activity of CuNPs and AgNPs (MNPs) was measured against spores and vegetative (planktonic and sessile) forms of the relevant human pathogens Enterohemorrhagic Escherichia coli (etiological agent of Hemolytic Uremic Syndrome), Listeria monocytogenes (etiological agent of septic abortion), Bacillus anthracis (etiological agent of Anthrax), Clostridium perfringens (etiological agent of food-associated diarrhea and Gas Gangrene), cystic-fibrosis related Pseudomona aeruginosa and methicillin-resistant Staphylococcus aureus ( etiological agent of sepsis and myocardiopathies). The planktonic and sessile growth (measured as the final cellular yield at 600 nm and crystal violet staining, respectively) of each pathogen, as well as the sporocide effect on C. perfringens and B. anthracis spores, was very significant at submillimolar concentrations of MNPs (95 % of vegetative growth inhibition and sporocide effect, p
TiO2 nanofibers were synthesized using electrospinning [Jamil et al Ceramics International 38 (2012) 2437–2441]. The nanofibers were polycrystalline and porous in nature having average diameter and length of ~150 nm and 200 µm, respectively. Fig. 1 (a) and (b) shows scanning electron microscope (SEM) and transmission electron microscope (TEM) image of TiO2 nanofibers, respectively. The bandgap of the nanofibers lies in optical range ˃ 3.2eV. Which showed relatively low photocatalytic degradation of toxic textile dyes (Fig. 2). To improve it photocatalytic activity we embedded Mn0.5Co0.5Fe2O4 nanoparticles into TiO2 nanofibers. Which showed improved photocatalytic activity for the degradation of toxic organic compound (Fig. 2). We are now investigating the effect of photocatalytic water splitting for hydrogen evolution. It is expected that these heterostructure nanofibers will show improve photocatalytic activity for hydrogen evolution via water splitting.
T1 - Growth and wetting properties of carbon nanofibers
Verma, Preparation of surfactant-mediated silver and copper nanoparticles dispersed in hierarchical carbon micro-nanofibers for antibacterial applications, New Biotechnology 2013; 30(6): 656665
Thesis Topic :Development of metal nanoparticles dispersed carbon micro and carbon nanofibers for biological applications
Carbon Nanofiber Applications & Properties | Sigma …
Title of Talk:
Fabrication and characterization of thermal, electrical and mechanical properties of ethylene-octene copolymer composites with functionalized multi-walled carbon nanotubes
Modification of polymers with carbon nanotubes allows development of advanced materials for structural, transportation, energetics, electronics and other sectors of national economy. Improvement of exploitation behaviour of carbon nanotubes reinforced polymer composites depends on multiple factors including intrinsic properties of the nanofiller and the chosen matrix material, purposeful tailoring of their interface during manufacturing by prior functionalization of the nanofiller and/or by using customized manufacturing approaches. In the current research various nanocomposite compositions, based on thermoplastic polyolefine copolymer and multi-wall carbon nanotubes (MWCNT), have been obtained via customized master batch approach. Two different ethylene-octene copolymers with distinct 1-octene content (EOC-17 and EOC-30, respectively) have been used to determine the effect of thermoplastic matrix on the structure and properties of the investigated nanocomposites at different MWCNT contents (from 0,2 to 15 wt.%). The nanocomposites have been characterized in respects to their structural, calorimetric, thermogravimetric, elastic and dielectric properties by using appropriate techniques (TEM, FTIR, Raman, TGA, DMTA, DES). Results of the analysis testify that increment of MWCNTs content in the both EOC matrices leads to considerable improvement of elastic, thermogravimetric and electric properties of the nanocomposites already at low nanofiller contents. Although, absolute values of storage modulus of the EOC17 based nanocomposites are considerably higher than in the case of the corresponding EOC30 based nanocomposites, relative MWCNTs reinforcing effect is greater in the latter case due to differences in crystallinity degrees of both polymer matrices. It is also interesting to note that electrical conductivities of less crystalline EOC30 based nanocomposites are greater than those for corresponding EOC17 based systems, most probably due to the facilitated development of conductive MWCNTs network within the electrically insulating polymer matrix. Meanwhile, type of EOC has no considerable effect on thermogravimetric relationships of the investigated nanocomposites neither in air nor inert environment.
Synthesis of Carbon Nanofibers and Carbon Nanotubes
Electrospun carbon nanofibers/nanotubes for Li-based batteries: ..
The pristine carbon nanofibers (CNFs) were prepared by a combination of electrospinning and thermal treatment.
Growth and wetting properties of carbon nanofibers
The electrospun nanofibers have average fiber diameter of 200-300 nm with carbon content up to ~ 80%.
Tyson Thesis | Carbon Nanotube | Fracture - Scribd
The carbon yield was higher on powder Fe from CO, but the yield was higher on Fe/Al2O3 from hydrocarbons.
Carbon nanofiber supported nickel catalysts (2005) | …
Dr. Salman (scientific deputy dean-Al-Nisour university college), he holds a PhD in chemical engineering, in addition to numerous international certifications in the field of environmental management. Dr. Salman’s achievements span more than three decades of significant leadership in the fields of chemical engineer process, adsorption process, preparation of activated carbons, environmental applications, water, soil, air monitoring and analysis (laboratories & fields), solar energy applications. Dr. Salman published more than 100 scientific manuscript, book and patent, he participated many scientific conferences, meeting and workshop. He got many awards from different national & international sides, the last one was scientists medal 2017 from International association for advance materials in Sweden. Dr. Salman has provided critical projects management and implementation services to international private sector companies operating in Iraq in addition to consultation and advisory services to the international companies in Iraq since 2003.
Carbon Nanofibers as Catalyst Support for Noble Metals
Dong Ha Kim received Ph.D. degrees in the Department of Fiber and Polymer Science at Seoul National University, Korea, in 2000. He carried out his postdoctoral researches at the University of Massachusetts at Amherst (from 2000 to 2003) with Prof. Thomas P. Russell and at the Max Planck Institute for Polymer Research (from 2003 to 2005) with Prof. Wolfgang Knoll. Then, he joined the Samsung Electronics Co. in the Memory Division of Semiconductor R & D Center as a senior scientist. In 2006 he assumed a faculty position in the Department of Chemistry and Nano Science at Ewha Womans University and currently he is a Full Professor and Ewha Fellow. His research interests include development of multi-functional hybrid nanostructures for applications in energy storage and conversion, environmental remediation, memory devices, display devices, and theranostics. He has authored 120 peer-reviewed SCI publications. He holds 29 Korean and 2 US patents. He is serving as editorial board member of Scientific Reports (Nature Publishing Groups) and advisory board member of Journal of Materials Chemistry A and Nanoscale (Royal Society of Chemistry).
Synthesis and Characterization of Nanofiber-based …
Nanotube activated carbon (NAC) prepared from Iraqi zahdi date seeds (ZDS) using physiochemical activation (KOH treatment and carbon dioxide gasification). The effects of the activation temperature, activation time and chemical impregnation ratios on the carbon yield, Pb2+ removal were investigated. From the analysis of variance (ANOVA), the most influential factor on each experimental design response was identified. The optimum conditions for preparing nano activated carbon from Zahdi date seeds were found to be activation temperature of 750.0 oC, activation time of 70 min and chemical impregnation ratio of 2.1. The carbon yield was found to be 19.0% while the removal of Pb2+ was found to be 94.0%.The nano activated carbon prepared for the removal of Pb2+ from aqueous solution by the adsorption process were found to contain, in general, large pore sizes. The higher activation temperature and KOH-char impregnation ratio (IR) applied is believed to be responsible for activated carbon characteristics which gave better outputs at least when compare to those being used commercially. However, the high surface areas and total pore volumes of the prepared activated carbon were believed to be due to the method of the activation process employed in this work which was a combination of both chemical and physical activating agents of KOH and CO2. Pore development during the carbonization process is an important step because it enhances the surface areas and pore volumes of the activated carbon by promoting the diffusion of KOH and CO2 moles into the pores thus increasing the KOH-C and CO2-C reactions; a process responsible for generating more pores in the activated carbon.
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