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Browsing by Author "Motaung, David E"

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Analysis of the structure, particle morphology and photoluminescent properties of ZnS:Mn2+ nanoparticulate phosphors

Author: Raleaooa, PV ; Roodt, A ; Mhlongo, Gugu H ; Motaung, David E ; Ntwaeaborwa, OM Date: Jan 2018 The structure, particle morphology and photoluminescent properties of n(sup2+) doped ZnS nanoparticles are reported. The X-ray powder diffraction studies showed that incorporation of Mn(sup2+) did not cause any change to the crystallized cubic ... Read more
Characteristics of point defects on the room temperature ferromagnetic and highly NO2 selectivity gas sensing of p-type Mn3O4 nanorods

Author: Kortidis, Ioannis ; Swart, HC ; Ray, Suprakas S ; Motaung, David E Date: Apr 2019 This study investigates the room temperature (RT) gas-sensing and ferromagnetic behavior of p-type materials based on a comparison of NiO, Mn3O4, and CuO nanostructures prepared using a hydrothermal method. The Mn3O4 nanorods based sensor ... Read more
Detailed understanding on the relation of various pH and synthesis reaction times towards a prominent low temperature H2S gas sensor based on ZnO nanoplatelets

Author: Kortidis, Ioannis ; Swart, HC ; Ray, Suprakas S ; Motaung, David E Date: Mar 2019 An unceasing scientific challenge to monitor the emissions of toxic and flammable gases in a selective approach is of great importance for safety of human health. As a result, herein, we report on the detailed study of the gas sensing ... Read more
Effect of additional electron acceptor in hybrid P3HT:PCBM:ZnO spin-coated films for photovoltaic application

Author: Muller, T ; Ramashia, TA ; Motaung, David E ; Cummings, F ; Malgas, G ; Oliphant, C ; Arendse, C Date: Apr 2016 Concerted efforts need to be undertaken to overcome limited efficiencies and instability issues in order to ensure a niche for organic photovoltaics (OPVs) in the PV market. Recent improvements on tandem structures aside, in order to achieve ... Read more
Effect of Organoclay on the Properties of Maleic Anhydride-Grafted Polypropylene and Poly(methyl methacrylate) Blend

Author: Hato, Mpitloane Joseph ; Motaung, David E ; Choi, Hyoung Jin ; Scriba, Manfred R ; Khumalo, Vincent M ; Malwela, Thomas Date: Mar 2017 Poly(methyl methacrylate)/polypropylene (PMMA/PP) and PMMA/maleic-anhydride grafted PP (MAPP) blends and their blend nanocomposites containing 2 wt% organoclay (Cloisite 15A, denoted C15A), prepared by a melt mixer were studied. Both X-ray ... Read more
Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature

Author: Tshabalala, Zamaswazi P ; Shingange, Katekani ; Dhonge, Baban, P ; Ntwaeaborwa, OM ; Mhlongo, Gugu H ; Motaung, David E Date: Jul 2016 Applications of ultra-highly sensitive and selective methane (CH(sub4)) room temperature gas sensors are important for various operations especially in underground mining environment. Therefore, this study is set out to investigate the effect ... Read more
Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment

Author: Tshabalala, Zamaswazi P ; Motaung, David E ; Mhlongo, Gugu H ; Ntwaeborwa, OM Date: Mar 2016 TiO2 nanoparticles were synthesized via a simple hydrothermal method in a sodium hydroxide (NaOH) aqueous solution and washed with distilled water and different concentrations of hydrochloric acid which acted as the morphological/crystallographic ... Read more
Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment

Author: Tshabalala, Zamaswazi P ; Motaung, David E ; Mhlongo, Gugu H ; Ntwaeborwa, OM Date: Mar 2016 TiO(sub2) nanoparticles were synthesized via a simple hydrothermal method in a sodium hydroxide (NaOH) aqueous solution and washed with distilled water and different concentrations of hydrochloric acid which acted as the morphological/cryst ... Read more
Formation and characterization of solid-solution (V,W,Ti)CN composite powder

Author: Bolokang, Amogelang S ; Motaung, David E Date: Apr 2017 We report on the synthesis of a mixture of vanadium (V), tungsten (W), titanium (Ti) and carbon (C) mixture using ball milling in argon atmosphere. Thermal analysis of the milled powder showed an exothermic reaction at approximately 700°C in ... Read more
Hierarchically Porous Cu-, Co-, and Mn-Doped Platelet-Like ZnO Nanostructures and their Photocatalytic Performance for Indoor Air Quality Control

Author: Papadaki, D ; Mhlongo, Gugu H ; Motaung, David E ; Nkosi, Steven S ; Panagiotaki, KP ; Christaki, E ; Assimakopoulos, MN ; Papadimitriou, VC ; Rosei, F ; Kiriakidis, G ; Ray, Suprakas S Date: Sep 2019 Several parameters, including specific surface area, morphology, crystal size, and dopant concentration, play a significant role in improving the photocatalytic performance of ZnO. However, it is still unclear which of these parameters play ... Read more
A highly responsive NH3 sensor based on Pd-loaded ZnO nanoparticles prepared via a chemical precipitation approach

Author: Mhlongo, Gugu H ; Motaung, David E ; Cummings, FR ; Swart, HC ; Ray, Suprakas S Date: Jul 2019 The gas-detecting ability of nanostructured ZnO has led to significant attention being paid to the development of a unique and effective approach to its synthesis. However, its poor sensitivity, cross-sensitivity to humidity, long response/recovery ... Read more
Improved sensitivity and selectivity of pristine zinc oxide nanostructures to H2S gas: Detailed study on the synthesis reaction time

Author: Motaung, David E ; Mhlongo, Gugu H ; Bolokang, Amogelang S ; Dhonge, Baban P ; Swart, HC ; Ray, Suprakas S Date: Nov 2016 The gas sensing properties of ZnO nanostructures synthesized at various reaction times are reported in this study. The response of ZnO nanostructures to H(sub2), NH(sub3), H(sub2)S and NO(sub2) gases was investigated at different operating ... Read more
In depth study on the notable room-temperature NO2gas sensorbased on CuO nanoplatelets prepared by sonochemical method: Comparison of various bases

Author: Oosthuizen, Dina N ; Motaung, David E ; Swart, HC Date: Aug 2018 The strategy for the synthesis of metal oxide nanostructured based sensors that operate at room temperature with higher sensitivity and selectivity facilitates the forecasts towards low cost and power consumption gas sensors which will be ... Read more
In depth study on the notable room-temperature NO2gas sensorbased on CuO nanoplatelets prepared by sonochemical method: Comparison of various bases

Author: Oosthuizen, Dina N ; Motaung, David E ; Swart, HC Date: Aug 2019 The strategy for the synthesis of metal oxide nanostructured based sensors that operate at room temperature with higher sensitivity and selectivity facilitates the forecasts towards low cost and power consumption gas sensors which will be ... Read more
Investigation into the thermal behaviour of the B2–NiAl intermetallic alloy produced by compaction and sintering of the elemental Ni and Al powders

Author: Camagu, Sigqibo T ; Mathabathe, Maria N ; Motaung, David E ; Muller, TFG ; Arendse, CJ ; Bolokang, Amogelang S Date: Nov 2019 A cubic B2–NiAl alloy was synthesized by mixing of elemental Ni and Al powders followed by cold compacting and sintering of some samples at 750 °C and other samples at 1300 °C. The alloys sintered at 1300 °C exhibited a brittle B2–NiAl structure ... Read more
Life cycle assessment of facile microwave-assisted zinc oxide (ZnO) nanostructures

Author: Papadaki, D ; Foteinis, S ; Mhlongo, Gugu H ; Nkosi, SS ; Motaung, David E ; Ray, Suprakas S ; Tsoutsos, T ; Kiriakidis, G Date: May 2017 The life cycle assessment of several zinc oxide (ZnO) nanostructures, fabricated by a facile microwave technique, is presented. Key synthesis parameters such as annealing temperature, varied from 90 °C to 220 °C, and microwave power, varied ... Read more
Luminescent, magnetic and optical properties of ZnO-ZnS nanocomposites

Author: Raleaooa, PV ; Roodt, A ; Mhlongo, Gugu H ; Motaung, David E ; Kroon, RE ; Ntwaeaborwa, OM Date: Feb 2017 The structure, particle morphology, optical and magnetic properties of ZnO, ZnS and ZnO-ZnS nanoparticles prepared by the sol-gel method are reported. ZnO and ZnS were combined at room temperature by an ex situ synthetic route to prepare ... Read more
Reduction-oxidation of V2O5-WO3 nanostructured by ball milling and annealing: Their improved H2S gas sensing performance

Author: Bolokang, Amogelang S ; Motaung, David E Date: Apr 2019 Nanocrystalline composite VO(sub)2-WO(sub)3 powder was produced via mechanical milling (MM) and annealing. SEM images showed the formation of rod-shaped and hollow-shaped like structures surrounded by nanoparticles. Transmission electron ... Read more
A review on recent progress of p-type nickel oxide based gas sensors: Future perspectives

Author: Mokoena, Teboho P ; Swart, HC ; Motaung, David E Date: Jun 2019 Recently, technological and industrial advances uninterruptedly cause the release of hazardous and toxic gases that are harmful to human life; as a result gas sensing devices that are highly sensitive and selective to such gases are in a high ... Read more
Room temperature ferromagnetism and gas sensing in ZnOnanostructures: Influence of intrinsic defects and Mn, Co, Cu doping

Author: Mhlongo, Gugu H ; Shingange, Katekani ; Tshabalala, Zamaswazi P ; Dhonge, Baban, P ; Mahmoud, FA ; Mwakikunga, Bonex W ; Motaung, David E Date: Dec 2016 Undoped and transition metal (Cu, Co and Mn) doped ZnO nanostructures were successfully prepared via a microwave-assisted hydrothermal method followed by annealing at 500 °C. Numerous characterization facilities such as X-ray powder diffraction ... Read more

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