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" (910,673 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
Young-Ho Ahn,
Environmental Technology
Advanced Treatment
Water Splitting
Photocatalysis
Membrane Technology
Metrics
H-Index
i10 Index
Citation
38
92
8,058
Deepak Chauhan
Environmental engineering
water electrolysis
wastewater treatment
Metrics
H-Index
i10 Index
Citation
9
9
311
Mohammad Obaid Qamar|Mohd Obaid Qamar, Obaid Qamar
Nanomaterials
Photocatalysis
Antibiotic Degradation
MDRBs Disinfection
Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
7
5
140
Rankings
Ranking Based On Selection: 1
Young-Ho Ahn,
Metrics
H-Index
i10 Index
Citation Counts
38
92
8,058
Environmental Technology
Advanced Treatment
Water Splitting
Photocatalysis
Membrane Technology
Rankings
Ranking Based On Selection: 2
Hyuksang Chang
Metrics
H-Index
i10 Index
Citation Counts
10
10
269
Rankings
Ranking Based On Selection: 3
Deepak Chauhan
Metrics
H-Index
i10 Index
Citation Counts
9
9
311
Environmental engineering
water electrolysis
wastewater treatment
Rankings
Ranking Based On Selection: 4
M Hammad Khan
Metrics
H-Index
i10 Index
Citation Counts
8
8
676
Water wastewater treatment
ozonation
tetracycline
LSI
Arsenic
Rankings
Ranking Based On Selection: 5
Mohammad Obaid Qamar|Mohd Obaid Qamar, Obaid Qamar
Metrics
H-Index
i10 Index
Citation Counts
7
5
140
Nanomaterials
Photocatalysis
Antibiotic Degradation
MDRBs Disinfection
Wastewater Treatment
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