Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Alex Kuvarega
Advanced oxidation processes
Nanomaterial synthesis
Heterogeneous catalysis
Water treatment
Metrics
H-Index
i10 Index
Citation
40
103
4,913
* Rankings
Ranking Based On Selection :2
Thabo Ti Nkambule
Natural Organic Matter
Urban Water Cycle
Nanotechnology for Water Treatment
Drinking Water Treatment
Membrane Science and Te
Metrics
H-Index
i10 Index
Citation
34
82
3,428
* Rankings
Ranking Based On Selection :3
Edward Nxumalo
Nanotechnology
Water Treatment Chemistry
Carbon Nanostructured Materials
Heterostructured Materials
Membrane Science and Tec
Metrics
H-Index
i10 Index
Citation
31
80
3,360
* Rankings
Ranking Based On Selection :4
Jack MJ Madito
Energy storage hybrid-materials
Graphene-based Nanomaterials
Metrics
H-Index
i10 Index
Citation
31
57
2,742
Olayemi Jola Fakayode
Nanoelectronic materials
magnetic nanomaterials
waste water treatments
photodynamic therapy
Metrics
H-Index
i10 Index
Citation
9
7
285
Lwazi Ndlwana
Polymers
nanocomposite membranes
metallic nanoparticles
water treatment
carbon nanomaterials
Metrics
H-Index
i10 Index
Citation
8
8
247
Ali Kabeya Ilunga
Homogeneous and Heterogeneous Catalysis
Nanotechnology
Materials Science
Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
8
8
230
Ntakadzeni Madima
Nanotechnology
Nanocomposite
Catalysis
Wastewater treatment
Energy storage
Metrics
H-Index
i10 Index
Citation
7
7
394
Patrice Umenne
Associate Professor in Josephson Effect
Microelectronics
Electronics
Embedded Systems
Nanotechnology
Metrics
H-Index
i10 Index
Citation
7
6
115
Unathi Sidwaba
Nanomaterials
Polymers
Nanocomposites
Electrochemistry
Bio/sensors
Metrics
H-Index
i10 Index
Citation
7
5
164
Rapelang Patala
Nanotechnology
membrane technology
water filtration
membrane fouling
Metrics
H-Index
i10 Index
Citation
6
5
223
Coster Kumunda
electroanalytical chemistry
nanomaterials
electrochemical detection and degradation
Metrics
H-Index
i10 Index
Citation
1
1
60
Rankings
Ranking Based On Selection: 1
Alex Kuvarega
Metrics
H-Index
i10 Index
Citation Counts
40
103
4,913
Advanced oxidation processes
Nanomaterial synthesis
Heterogeneous catalysis
Water treatment
Rankings
Ranking Based On Selection: 2
Thabo Ti Nkambule
Metrics
H-Index
i10 Index
Citation Counts
34
82
3,428
Natural Organic Matter
Urban Water Cycle
Nanotechnology for Water Treatment
Drinking Water Treatment
Membrane Science and Te
Rankings
Ranking Based On Selection: 3
Edward Nxumalo
Metrics
H-Index
i10 Index
Citation Counts
31
80
3,360
Nanotechnology
Water Treatment Chemistry
Carbon Nanostructured Materials
Heterostructured Materials
Membrane Science and Tec
Rankings
Ranking Based On Selection: 4
Jack MJ Madito
Metrics
H-Index
i10 Index
Citation Counts
31
57
2,742
Energy storage hybrid-materials
Graphene-based Nanomaterials
Rankings
Ranking Based On Selection: 5
Tmesgen Girma Kebede
Metrics
H-Index
i10 Index
Citation Counts
14
16
744
Rankings
Ranking Based On Selection: 6
Olayemi Jola Fakayode
Metrics
H-Index
i10 Index
Citation Counts
9
7
285
Nanoelectronic materials
magnetic nanomaterials
waste water treatments
photodynamic therapy
Rankings
Ranking Based On Selection: 7
Lwazi Ndlwana
Metrics
H-Index
i10 Index
Citation Counts
8
8
247
Polymers
nanocomposite membranes
metallic nanoparticles
water treatment
carbon nanomaterials
Rankings
Ranking Based On Selection: 8
Ali Kabeya Ilunga
Metrics
H-Index
i10 Index
Citation Counts
8
8
230
Homogeneous and Heterogeneous Catalysis
Nanotechnology
Materials Science
Wastewater Treatment
Rankings
Ranking Based On Selection: 9
Ntakadzeni Madima
Metrics
H-Index
i10 Index
Citation Counts
7
7
394
Nanotechnology
Nanocomposite
Catalysis
Wastewater treatment
Energy storage
Rankings
Ranking Based On Selection: 10
Patrice Umenne
Metrics
H-Index
i10 Index
Citation Counts
7
6
115
Associate Professor in Josephson Effect
Microelectronics
Electronics
Embedded Systems
Nanotechnology
Rankings
Ranking Based On Selection: 11
Unathi Sidwaba
Metrics
H-Index
i10 Index
Citation Counts
7
5
164
Nanomaterials
Polymers
Nanocomposites
Electrochemistry
Bio/sensors
Rankings
Ranking Based On Selection: 12
Rapelang Patala
Metrics
H-Index
i10 Index
Citation Counts
6
5
223
Nanotechnology
membrane technology
water filtration
membrane fouling
Rankings
Ranking Based On Selection: 13
Sreedhar Doraswamy
Metrics
H-Index
i10 Index
Citation Counts
6
5
143
Rankings
Ranking Based On Selection: 14
Keletso Mphahlele
Metrics
H-Index
i10 Index
Citation Counts
4
4
253
Rankings
Ranking Based On Selection: 15
Coster Kumunda
Metrics
H-Index
i10 Index
Citation Counts
1
1
60
electroanalytical chemistry
nanomaterials
electrochemical detection and degradation