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Browsing by Subject "Crystallinity"

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Dual catalytic purpose of the tungsten filament during the synthesis of single-helix carbon microcoils by hot-wire CVD

Author: Oliphant, CJ ; Arendse, CJ ; Malgas, GF ; Motaung, DE ; Muller, TFG ; Knoesen, D Date: Oct 2009 This paper reports on the deposition of crystalline single-helix carbon microcoils, in the as-deposited state, by the hot-wire chemical vapor deposition process without any special preparation of nano-sized transition metal catalysts and ... Read more
Esterified cellulose nanofibres from saw dust using vegetable oil

Author: Mokoena, Teboho P ; Mathew, Maya J Date: Apr 2020 In this work, cellulose nanofibres (CNFs) were extracted from sawdust, which is an underutilized by-product from the wood and timber industry. The extracted CNFs by chemical and mechanical treatments had a web-like structure with diameters ... Read more
Growth kinetics of nc-Si:H deposited at 200 °C by hot-wire chemical vapour deposition

Author: Oliphant, CJ ; Arendse, CJ ; Knoesen, D ; Muller, TFG ; Prins, S ; Malgas, GF Date: May 2011 The authors report on the growth kinetics of hydrogenated nanocrystalline silicon, with specific focus on the effects of the deposition time and hydrogen dilution on the nano-structural properties. The growth in the crystallite size, attributed ... Read more
Influence of aluminium source on the crystal structure and framework coordination of Al and Si in fly ash-based zeolite NaA

Author: Ameh, AE ; Fatoba, OO ; Musyoka, Nicholas M ; Petrik, LF Date: Jan 2017 In this study zeolite NaA with different crystal sizes and % crystallinity was prepared from a clear solution extract of fused fly ash. Sodium aluminate or aluminium hydroxide was used to adjust the aluminium content in the fused fly ash ... Read more
Properties of ligno-cellulose ficus religiosa leaf fibers

Author: Reddy, KO ; Maheswari, CU ; Reddy, DJP ; Guduri, BR ; Rajulu, AV Date: Apr 2010 The native (untreated) and alkali treated fibers from the ficus leaves were analyzed by Fourier transform infrared (FTIR), Chemical, X-ray and Thermo gravimetric methods. The morphology of the fibers before and after alkali treatment was ... Read more
Properties of natural fabric Polyalthia cerasoides

Author: Jayaramudu, J ; Reddy, DJP ; Guduri, BR ; Rajulu, AV Date: Jun 2009 The ligno-cellulose natural fabric from the Polyalthia cerasoides tree was analyzed by FTIR, chemical, X-ray and thermo gravimetric methods. The morphology of the fibers was studied by scanning electron and polarized optical microscopic ... Read more
Transformation of fly ash based nanosilica extract to BEA zeolite and its durability in hot liquid

Author: Ameh, AE ; Fatoba, OO ; Musyoka, Nicholas M ; Louis, B ; Petrik, LF Date: Oct 2020 Power generation in South Africa relies heavily on the combustion of coal and during this process, coal fly ash (CFA) is generated as by-product, which raises several environmental issues. The transformation of CFA into a value added zeolite ... Read more

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Browsing by Subject "Crystallinity"

Browsing by Subject "Crystallinity"

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