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Browsing by Subject "Oxidation"

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Catalytic Activity and Structure Properties of Doped VOHPO4 ·0.5H2O with Nanosized Ru, Au, Fe and Mn in Benzene Hydroxylation

Author: Makgwane, Peter R ; Ray, SS Date: 2013 The promotional effect of nanosized Ru, Fe, Au, and Mn particles on VOHPO(sub4) ·0.5H(sub2)O (VHP) catalytic properties was investigated in benzene hydroxylation reaction using hydrogen hydroperoxide (H(sub2)O(sub2) as oxidant. Catalytic ... Read more
The effect of Cr additions and oxidation on densification, microstructure, phase constituents and mechanical properties of TiAlCr alloys produced by SPS

Author: Mogale, N ; Matizamhuka, W ; Machaka, Ronald ; Shongwe, M ; Yamabe-Mitarai, Y Y Date: Jan 2021 Ternary Ti-47.5Al-(1–3)Cr (at. %) and reference quaternary Ti-48Al-2Cr-2Nb (at. %) titanium aluminide alloys were processed from elemental powders utilizing mechanical milling, mechanical alloying and spark plasma sintering. The effect of Cr ... Read more
Efficient room temperature oxidation of cyclohexane over highly active hetero-mixed WO3/V2O5 oxide catalyst

Author: Makgwane, Peter R ; Ray, SS Date: Sep 2014 An efficient room temperature catalyzed oxidation of cyclohexane to cyclohexanone (K) and cyclohexanol (A) was achieved over hetero-mixed tungsten–vanadia (WO(sub3)/V(sub2)O(sub5)) using H(sub2)O(sub2) oxidant. WO(sub3)/V(sub2)O(sub5) exhibited ... Read more
Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Sep 2022 In this study, AlCoCrFeNi–Cu (Cu-based) and AlCoCrFeNi–Ti (Ti-based) high entropy alloys (HEAs) were fabricated using a direct blown powder technique via laser additive manufacturing on an A301 steel baseplate for aerospace applications. The ... Read more
Experiments conducted to determine the reproductibility of float and sink analysis and the effect of coal pretreatment on float and sink analysis

Author: Erasmus, TC ; Du Plessis, HSL Date: 1963 The raw coal brought to the pilot plant was reduced to minus three inches. The minus three inch coal was passed over screens to eliminate minus 1/4 inch fines. Read more
Hetero-mixed TiO2-SnO2 interfaced nano-oxide catalyst with enhanced activity for selective oxidation of furfural to maleic acid

Author: Malibo, Pretrus M ; Makgwane, Peter R ; Baker, PGL Date: Jul 2021 Herein we report on the catalytic activity of hetero-mixed TiO2-SnO2 nano-oxide catalyst for the selective liquidphase oxidation of furfural to maleic acid using H2O2 oxidant. The high surface area and strong interaction of the two oxides ... Read more
Heterostructured redox-active V205/SnO2 oxide nanocatalyst for aqueous-phase oxidation of furfural to renewable maleic acid

Author: Malibo, Petrus M ; Makgwane, Peter R ; Baker, PG Date: Jun 2020 In this paper, we report on the synthesis of heterostructured V2O5/SnO2 nanocatalysts with varying vanadium metal loadings of 5–30 wt%. The catalytic performance of the designed catalysts was evaluated in the oxidation reaction of furfural ... Read more
Hydroxylation of benzene to phenol over magnetic recyclable nanostructured CuFe mixed-oxide catalyst

Author: Makgwane, Peter R ; Ray, SS Date: Mar 2015 A highly active and magnetically recyclable nanostructured copper–iron oxide (CuFe) catalyst has been synthesized for hydroxylation of benzene to phenol under mild reaction conditions. The obtained catalytic results were correlated with the ... Read more
Nitrite electrochemical sensor based on prussian blue/single-walled carbon nanotubes modified pyrolytic graphite electrode

Author: Adekunle, AS ; Mamba, BB ; Agboola, BO ; Ozoemena, KI Date: Sep 2011 Nitrite, NO2- (in neutral), and NO (in acidic media) were used as analytical probe to investigate the electrocatalytic properties of Prussian blue nanoparticles (PB) modified edge plane pyrolytic graphite (EPPG) electrode. Results indicate ... Read more
Oxidative coupling of 1-naphthols over noble and base metal catalysts

Author: Maphoru, MV ; Heveling, J ; Kesavan Pillai, Sreejarani Date: Jan 2014 Bismuth-promoted platinum catalysts were tested for the oxidative coupling of 2- and 4-substituted 1-naphthols at different temperatures and ambient pressure. The principal final products are the 3,3'-substituted 1,1'-binaphthalenylidene-4,4'-diones ... Read more
The study of degradation mechanisms of glyco-engineered plant produced anti-rabies monoclonal antibodies E559 and 62-71-3

Author: Buthelezi, Sindisiwe G ; Dirr, HW ; Chakauya, Ereck ; Chikwamba, Rachel K ; Martens, L ; Tsekoa, Tsepo L ; Vandermarliere, E ; Stoychev, Stoyan H Date: Dec 2018 Rabies is an ancient and neglected zoonotic disease caused by the rabies virus, a neurotropic RNA virus that belongs to the Rhabdoviridae family, genus Lyssavirus. It remains an important public health problem as there are cost and health ... Read more
Surface characterization and formation mechanism of the ceramic TiO2-xNx spherical powder induced by annealing in air

Author: Camagu, Sigqibo T ; Bolokang, Amogelang S ; Muller, TFG ; Motaung, David E ; Arendse, CJ Date: Jun 2019 Mechanism for the formation of titanium oxynitride (TiO(sub2)-(subx)N(subx)) on the surfaces of spherical Ti powder particles upon heat treatment in air at 500, 600, 700 and 800 °C was investigated. The results showed that the first at 500 ... Read more
Surface characterization of the cyclically oxidized -Ti-48Al-2Nb-0.7Cr alloy after nitridation

Author: Mathabathe, Maria N ; Govender, Gonasagren ; Siyasiya, CW ; Mostert, RJ ; Bolokang, Amogelang S Date: Aug 2019 Surface properties of the nitrided -Ti-48Al-2Nb-0.7Cr intermetallic alloy after cyclic oxidation was characterized. The nitride coating was successfully deposited after annealing of the Ti-48Al-2Nb-0.7Cr intermetallic alloy at 900 °C under ... Read more

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Browsing by Subject "Oxidation"

Browsing by Subject "Oxidation"

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