diamond-carbon-graphene-2017-posters-abstracts

19 / 24

Page 93
conferenceseries.com Joint Conference
July 17-18, 2017 Chicago, USA
International Conference on
DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS
Volume 6, Issue 6 (Suppl) J Material Sci Eng, an open access journal
ISSN: 2169-0022
Diamond and Carbon 2017 & Graphene 2017
July 17-18, 2017
J Material Sci Eng 2017, 6:6(Suppl)
DOI: 10.4172/2169-0022-C1-077
Gold and Diamond-bearing astropipes of mongolia (Neologism and new scientific discovery)
D. Dorjnamjaa, B. Enkhbaatar, G. Altanshagai
Mongolian Academy of Sciences, Mongolia
In this paper we present summation of eighteen year’s investigation of the all gold and diamond-bearing astropipes ofMongolia.
Four astropipe structures are exemplified by the Agit Khangay (10 km in diameter, 470 38' N; 960 05' E), Khuree Mandal
(D=11 km; 460 28' N; 980 25' E), Bayan Khuree (D=1 km; 440 06' N; 1090 36' E), and Tsenkher (D=7 km; 980 21' N; 430 36' E)
astropipes of Mongolia. Detailed geological and gas-geochemical investigation of the astropipe structures show that diamond
genesis is an expression of collision of the lithospheric mantle with the explosion process initiated in an impact collapse meteor
crater. The term “astropipes” (Dorjnamjaa et al., 2010, 2011) is a neologism and new scientific discovery in Earth science and
these structures are unique in certain aspects. The Mongolian astropipes are genuine “meteorite crater” structures but they
also contain kimberlite diamonds and gold. Suevite-like rocks from the astropipes contain such minerals, as olivine, coesite,
moissanite (0,6 mm), stishovite, coesite, kamacite,tektite, khamaravaevite (mineral of meteorite titanic carbon), graphite-2H,
khondrite, picroilmenite, pyrope, phlogopite, khangaite (tektite glass, 1,0-3,0 mm in size), etc. Most panned samples and hand
specimens contain fine diamonds with octahedrol habit (0, 2-2,19 mm, 6,4 mg or 0,034-0,1 carat) and gold (0,1-5 g/t). Of
special interest is the large amount of the black magnetic balls (0,05-5,0 mm) are characterized by high content of Ti, Fe, Co, Ni,
Cu, Mn, Mg, Cd, Ga, Cl, Al, Si, K. Meanwhile, shatter cones (size approx. 1.0 m) which are known frommany meteorite craters
on the Earth as being typical of impact craters were first described by us Khuree Mandal and Tsenkher astropipe structures. All
the described meteorite craters posses reliable topographic, geological, mineralogical, geochemical, and aerospace mapping
data, also some geophysical and petrological features (especially shock metamorphism) have been found, all of which indicate
that these structures are a proven new type of gold-diamond-bearing impact structure, termed here “astropipes”. The essence
of the phenomenon is mantle manifestation and plume of a combined nuclear-magma-palingenesis interaction.
Hierarchical porous carbon nanostructures for energy storage
Jian-Gan Wang
Northwestern Polytechnical University, China
Hierarchical porous carbon nanostructures offer a promising avenue to effectively address energy and environmental
problems. In this talk, we would introduce two recent work regarding porous carbon nanotubes and nitrogen-doped
ordered mesoporous carbon spheres. First, we developed a totally green synthesis route for fabricating hierarchically porous
carbon nanotubes without the assistance of any soft/hard templates and activation procedures, thereby rendering the new
synthesis route highly recyclable, eco-friendly, and scalable. The as-prepared porous carbon materials exhibit a high specific
surface area of 1500 m2 g-1. The porous carbon can be served as excellent electrode materials for high-performance
supercapacitors, delivering a high specific capacitance of 281 F g-1 at 0.1 A g-1 along with outstanding rate and cyclic
performance. In the second section, we will report a facile one-pot soft-templating and one-step pyrolysis method to fabricate
nitrogen-doped ordered mesoporous carbon spheres (N-OMCS). The as-obtained N-OMCS possesses an average diameter of
around 300 nm, a moderate specific surface area of 439 m2 g-1 and uniform mesopore size at 3.2 nm. Owing to the ordered
meso-structure and nitrogen doping, the N-OMCS materials, when used as supercapacitor electrodes, delivers a high specific
capacitance of 288 F g-1 at a current density of 0.1 A g-1. More remarkably, the N-OMCS electrode shows excellent rate
capability with 66% capacitance retention at an ultrahigh current density of 50 A g-1 and outstanding cycling stability with
almost no degradation over 25000 cycles. The two work would open up new avenues to synthesize highly porous carbon
nanostructures with unique architecture and surface chemistry, such as hollow/meso structure and nitrogen doping for high
efficient energy storage applications.
wpu.edu.cn