Lucy M. Ombaka

ORCID: 0000-0001-6179-368X
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About
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Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Nanomaterials for catalytic reactions
  • Advanced Photocatalysis Techniques
  • Graphene research and applications
  • Catalytic Processes in Materials Science
  • Carbon Nanotubes in Composites
  • Zeolite Catalysis and Synthesis
  • Copper-based nanomaterials and applications
  • Catalysis and Oxidation Reactions
  • Advancements in Battery Materials
  • Porphyrin and Phthalocyanine Chemistry
  • Carbon and Quantum Dots Applications
  • N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
  • Photodynamic Therapy Research Studies
  • Ferrocene Chemistry and Applications
  • Gas Sensing Nanomaterials and Sensors
  • Atmospheric chemistry and aerosols
  • Advanced Nanomaterials in Catalysis
  • Quantum Dots Synthesis And Properties
  • Nanocluster Synthesis and Applications
  • Molecular Junctions and Nanostructures
  • Air Quality and Health Impacts
  • Free Radicals and Antioxidants
  • Indoor Air Quality and Microbial Exposure

Leibniz University Hannover
2020-2022

Technical University of Kenya
2017-2022

University of KwaZulu-Natal
2013-2017

The selective synthesis of pyrrolic N-CNTs, which promote the catalytic activity, and selectivity PdN/CNTs used to hydrogenate nitrobenzophenone.

10.1039/c4ra12523a article EN RSC Advances 2014-11-24

Zero-valent copper (Cu0) is a promising co-catalyst in semiconductor-based photocatalysis as it inexpensive and exhibits electronic properties similar to those of Ag Au. However, its practical application photocatalytic hydrogen production limited by susceptibility oxidation, forming less active Cu species. Herein, we have carried out situ encapsulation Cu0 nanoparticles with N-graphitic carbon layers (14.4% N) stabilize (N/C-coated Cu) improve the communication TiO2 photocatalyst. A facile...

10.1021/acsami.0c06880 article EN ACS Applied Materials & Interfaces 2020-06-11

Microbial pathogens have increasingly shown multidrug resistance posing a serious threat to the public health. Advances in technology are opening novel avenues for discovery of compounds that will mitigate ever-increasing drug-resistant microbes. Use photodynamic photosensitizer is one promising alternative approaches since they offer low risk bacteria as use generated reactive oxygen species kill Phthalocyanine (Pc) such which has already antimicrobial therapeutic properties. Previous...

10.1155/2018/2598062 article EN cc-by Advances in Chemistry 2018-03-19

Tobacco smoke is a toxic gas-phase cocktail consisting of broad range organics, and free radical intermediates. The formation from burning cigarette depends on series mechanisms, including generation products by pyrolysis combustion, aerosol formation, physical mass transfer processes. current study simulates the deposition particulate matter human lung surface trapping tobacco particulates in situ silica gel. To mimic this phenomenon, was smoked directly siliga morphology condensate trapped...

10.1186/s13065-017-0311-3 article EN cc-by Chemistry Central Journal 2017-08-08

An efficient and simple solvent-free mechanochemical approach for the synthesis of 1,1′-ferrocenyldiacrylonitriles was achieved by grinding together 1,1′-ferrocenedicarboxaldehyde (1) phenylacetonitriles. A range ferrocenylacrylonitriles (2–7) were synthesized within short reaction times, with water as only by-product. In a similar manner, ferrocenemonocarboxaldehyde (8) phenylenediacetonitrile yielded phenylene-3,3′-bis-(ferrocenyl)diacrylonitrile (9)...

10.1080/00958972.2014.931946 article EN Journal of Coordination Chemistry 2014-06-03

Spinel ferrites such as nickel ferrite are promising energy conversion photocatalysts they visible-light absorbers, chemically stable, earth abundant, and inexpensive. Nickel shows poor photocatalytic activity due to fast electron–hole recombination upon illumination. This study evaluates the capability of carbon dots (CDs) improve charge-carrier separation in NiFe2O4. We report a facile solvothermal approach for synthesizing NiFe2O4 CDs/NiFe2O4 nanoparticles at 200–215 °C. The were...

10.1063/1.5134432 article EN cc-by APL Materials 2020-03-01

Abstract In the last years, there has been an alarming increase in antibiotic resistance by pathogenic microbes, which become a major public health concern. There is great interest developing new antimicrobial for reducing impact. Silver nanoparticles (AgNPs) as antibacterial agents are currently being studied to be used fight these microbes. The aim of present study was synthesize AgNPs different sizes through use microwave and determine their activities. Synthesis size‐dependent l...

10.1002/jin2.62 article EN cc-by-nc Journal of Interdisciplinary Nanomedicine 2019-08-12

The synthesis of phthalocyanine (Pc) fabricated using an electron withdrawing functional group (ethylsuphonyl) and conjugated with silver nanoparticles via a microwave-assisted method is reported. Its photochemical properties photo-sensitivity against bacterial cultures Bacillus subtilis, Escherichia coli, Salmonella typhi Staphylococcus aureus the synthesized compound discussed. Broth microdilution agar disc diffusion was used to determine its antibacterial properties. Cytotoxicity test...

10.2139/ssrn.4551951 preprint EN 2023-01-01
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