Experts directory

Dr G Mamba

College of Science, Engineering and Technology
School of Science
Nanotechnology and Water Sustainability (NanoWS) Reserach Unit
Post-Doctoral Research Fellow
Tel: 011 471 3978


  • Membrane Technology
  • Nanomaterials Characterization
  • Nanotechnology for Water Treatment
  • Polymer chemistry


  • PhD Chemistry (University of Johannesburg, South Africa, 2015)
  • MSc Chemistry (University of Johannesburg, South Africa, 2010)
  • PGCE (University of Swaziland, Swaziland, 2007)
  • BSc (Biology/Chemistry, University of Swaziland, Swaziland, 2006)

Currently teaching

  • Inorganic Chemistry
  • Nanostructured materials synthesis
  • Water treatment

Fields of academic interests

  • Catalysis
  • Renewable energy generation
  • Environmental decontamination

Field of Specialisation

  • Inorganic Chemistry
  • Nanostructured materials synthesis
  • Water treatment


G. Mamba, X.Y. Mbianda, A.K. Mishra. (2014) Chapter 8 Application of Carbon Nanotube-Polymer Composites and Carbon Nanotube-Semiconductor Hybrids in Water Treatment. In book: Applications of Nanotechnology in Water Research, Wiley-Scrivener Publishing LLC, pp.183-228, ISBN: 978- 1-118-49630-5.

Journal articles

  1. G. Mamba; J. Kiwi; C. Pulgarin, R. Sanjines, S. Giannakis, S. Rtimi. Evidence for the degradation of an emerging pollutant by a mechanism involving iso-enegetic charge transfer under visible light. Applied Catalysis B: Environmental 233 (2018) 175-183.
  2.  G. Mamba; S. Rtimi; C. Pulgarin; M. Bensimon; J. Kiwi. Synchronic coupling of Cu2O(p)/CuO(n) semiconductors leading to Norfloxacin degradation under visible light: Kinetics, mechanism and surface film properties. Journal of Catalysis 353 (2017) 133-140
  3.  G. Mamba, A.K. Mishra. Graphitic carbon nitride (g-C3N4) heterostructures: A new and exciting generation of visible light driven photocatalysts for environmental pollution remediation. Applied Catalysis B: Environmental 198 (2016) 347-377.
  4.  G. Mamba, A.K. Mishra. Advances in magnetically separable photocatalysts: Smart, recyclable materials for water treatment. Catalysts (Invited contribution) 6 (6) (2016) 79.
  5.  G. Mamba, X.Y. Mbianda, A.K. Mishra. Photocatalytic degradation of the diazo dye naphthol blue black in water using MWCNT/Gd, N, S-TiO2 nanocomposites under simulated solar light. Journal of Environmental Sciences 33 (2015) 219-228.
  6.  G. Mamba, X.Y. Mbianda, A.K. Mishra. Enhanced visible light photocatalytic degradation of eriochrome black T and eosin blue shade in water using tridoped titania decorated on SWCNTs and MWCNTs: Effect of the type of carbon nanotube incorporated. Materials Chemistry and Physics 149-150 (2015) 734-742.
  7. G. Mamba, X.Y. Mbianda, A.K. Mishra. Gadolinium nanoparticle-decorated multiwalled carbon nanotube/titania nanocomposites for degradation of methylene blue in water under simulated solar light. Environmental Science and Pollution Research 21 (2014) 5597-5609.
  8. G. Mamba, M.A. Mamo, X.Y. Mbianda, A.K. Mishra. Nd,N,S-TiO2 decorated on reduced graphene oxide for a visible light active photocatalyst for dye degradation: A comparison to its MWCNT/Nd,N,S-TiO2 analogue. Industrial and Engineering Chemistry Research 53 (2014) 14329−14338.

Paper presentations

Publications:  12

Professional positions, fellowships & awards

  • Certificated Natural Scientist, SACNASP
  • Member of the South African Chemical Institute (SACI)
  • Swiss Government Excellence Postdoctoral Fellowship, Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland
  • Postdoctoral Research Fellow, UNISA College of Science, Engineering and Technology, Florida.
  • DST-NRF Centre of Excellence in Strong Materials PhD Fellowship


  • Magnetic ternary nanostructures for heavy metal reduction and oxidation of emerging pollutants
  • Photocatalytic ozonation of natural organic matter
  • Photocatalytic surfaces prepared by DCMS for oxidation of emerging pollutants
  • Rare earth doped titania/carbon nanomaterial nanocomposites for dye degradation
  • Phosphorylated carbon nanotube-cyclodextrin polymers for water treatment


Dr Mamba is currently a Postdoctoral Fellow in the Nanotechnology and Water Sustainability Research Unit (NanoWS), College of Science, Engineering and Technology, University of South Africa. His research involves design and preparation of photocatalytic materials for environmental decontamination. Dr Mamba obtained his PhD in Chemistry from the University of Johannesburg in 2015 where he was working on rare-earth doped titania/carbon nanomaterial heterojunctions for dye degradation. Shortly after his PhD, Dr Mamba joined Prof Ajay K. Mishra’s group at NanoWS as a Postdoctoral Fellow for one year, working on magnetic nanocomposites for water treatment. In 2016, Dr Mamba was awarded the prestigious Swiss Government Excellence Postdoctoral Fellowship to spend one year at Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland. During this fellowship, Dr Mamba worked in the Institute of Basic Sciences and Engineering, Group Advanced Oxidation Processes headed by Prof Cesar Pulgarin and conducted research on photocatalytic coatings for degradation of emerging pollutants. Dr Mamba currently co-supervises 2 MSc students.

Dr Mamba’s google scholar and ResearchGate profiles can be accessed at: