Ahmad Umar

41.6k total citations · 7 hit papers
844 papers, 30.6k citations indexed

About

Ahmad Umar is a scholar working on Materials Chemistry, Electrical and Electronic Engineering and Renewable Energy, Sustainability and the Environment. According to data from OpenAlex, Ahmad Umar has authored 844 papers receiving a total of 30.6k indexed citations (citations by other indexed papers that have themselves been cited), including 405 papers in Materials Chemistry, 400 papers in Electrical and Electronic Engineering and 143 papers in Renewable Energy, Sustainability and the Environment. Recurrent topics in Ahmad Umar's work include Gas Sensing Nanomaterials and Sensors (201 papers), ZnO doping and properties (159 papers) and Advanced Photocatalysis Techniques (113 papers). Ahmad Umar is often cited by papers focused on Gas Sensing Nanomaterials and Sensors (201 papers), ZnO doping and properties (159 papers) and Advanced Photocatalysis Techniques (113 papers). Ahmad Umar collaborates with scholars based in Saudi Arabia, India and United States. Ahmad Umar's co-authors include Yoon‐Bong Hahn, Rajesh Kumar, S.K. Mehta, Sushil Kumar Kansal, Sotirios Baskoutas, Girish Kumar, Mohammed M. Rahman, Ahmed A. Ibrahim, Savita Chaudhary and A. Al‐Hajry and has published in prestigious journals such as SHILAP Revista de lepidopterología, Environmental Science & Technology and ACS Nano.

In The Last Decade

Ahmad Umar

823 papers receiving 30.0k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Zinc Oxide Nanostructures for NO2 Gas–Sensor Applications: A Review

2014 728 citations Rajesh Kumar, Ahmad Umar et al. profile →
Hierarchical porous carbon aerogel derived from bagasse for high performance supercapacitor electrode

2014 570 citations Ahmad Umar et al. profile →
Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines

2018 537 citations Ahmad Umar et al. profile →
Hierarchical SnO₂ Nanostructures Made of Intermingled Ultrathin Nanosheets for Environmental Remediation, Smart Gas Sensor, and Supercapacitor Applications

2014 470 citations Ahmad Umar, Xiang Wu et al. profile →
Zinc oxide nanonail based chemical sensor for hydrazine detection

2007 466 citations Ahmad Umar et al. profile →
Antimicrobial properties of ZnO nanomaterials: A review

2016 462 citations Rajesh Kumar, Ahmad Umar et al. profile →
Nanomaterials-based biosensor and their applications: A review

2023 196 citations Ahmad Umar, Ahmed A. Ibrahim et al. profile →

Peers

Countries citing papers authored by Ahmad Umar

Since Specialization

Citations

This map shows the geographic impact of Ahmad Umar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ahmad Umar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ahmad Umar more than expected).

Fields of papers citing papers by Ahmad Umar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ahmad Umar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ahmad Umar. The network helps show where Ahmad Umar may publish in the future.

Co-authorship network of co-authors of Ahmad Umar

This figure shows the co-authorship network connecting the top 25 collaborators of Ahmad Umar. A scholar is included among the top collaborators of Ahmad Umar based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ahmad Umar. Ahmad Umar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work	Indexed citations
1	Fluorescent Carbon Dots from Disposable Masks: Pathogen Sensing and UV-Blocking Film Integration 2025 ·Journal of Fluorescence ·(unknown), Ganga Ram Chaudhary, Savita Chaudhary, Ahmad Umar, (unknown)	2
2	Next‐Generation Supercapacitors: Advances in Binder‐Free Electrodes, Scalable Fabrication, and Emerging Applications 2025 ·Advanced Sustainable Systems ·(unknown), (unknown), (unknown), Ahmad Umar, Ahmed A. Ibrahim, Sheikh A. Akbar, Sajid Ali Ansari, Sotirios Baskoutas, Dhammanand J. Shirale	1
3	Carbon dots in catalysis: Synthesis, properties, applications, comparative advantages, and future directions 2025 ·Journal of environmental chemical engineering ·(unknown), Savita Chaudhary, Ahmad Umar, Ahmed A. Ibrahim	5
4	Green synthesis and multifunctional properties of Cu/NiO nanocomposites using Commelina benghalensis leaf extract 2024 ·Chemosphere ·Ravi Kumar, Kuldeep Kumar, Naveen Thakur, Ahmad Umar, Ahmed A. Ibrahim, Sheikh A. Akbar, Sotirios Baskoutas	7
5	Exploring the potential of reduced graphene oxide/polyaniline (rGO@PANI) nanocomposites for high-performance supercapacitor application 2024 ·Electrochimica Acta ·Ahmad Umar, Faheem Ahmed, Nabi Ullah, Sajid Ali Ansari, Shahid Hussain, Ahmed A. Ibrahim, Hussam Qasem, Ashok Kumar S, Mohsen A. M. Alhamami, (unknown), Hassan Algadi, Tubia Almas, (unknown), (unknown)	44
6	Enhancement the performance of MAPbI3 perovskite solar cells via germanium sulfide doping 2024 ·Optical Materials ·E.M. Mkawi, Saif M. H. Qaid, Iman S. Roqan, Yas Al‐Hadeethi, (unknown), (unknown), (unknown), (unknown), (unknown), Yahya Alajlani, Ahmad Umar, Elena Bekyarova, Abdullah S. Aldwayyan	3
7	Highly active and durable NiCoP electrocatalyst through Ga ion intercalation strategy for long-lasting water electrolysis 2024 ·Applied Surface Science ·Dengke Wang, (unknown), Abdukader Abdukayum, Ahmad Umar, Xiang Wu	21
8	Nature-inspired polymer photocatalysts for green NADH regeneration and nitroarene transformation 2024 ·Chemosphere ·Ranjeet Singh, Rajesh K. Yadav, (unknown), Satyam Singh, (unknown), Ahmad Umar, Ahmed A. Ibrahim, Omvir Singh, Navneet Kumar Gupta, Chandani Singh, (unknown), Sotirios Baskoutas	2
9	Highly Selective Nitrogen-Doped Graphene Quantum Dots/Eriochrome Cyanine Composite Photocatalyst for NADH Regeneration and Coupling of Benzylamine in Aerobic Condition under Solar Light 2023 ·Catalysts ·(unknown), Rajesh K. Yadav, (unknown), Satyam Singh, Atul Pratap Singh, D. K. Dwivedi, Ahmad Umar, Navneet Kumar Gupta	10
10	An electrochemical aptasensor based on stimulus response and signal amplification strategy for the detection of Amyloid-β oligomers 2023 ·Microchemical Journal ·Zhe Ren, Wenjuan Guo, Ahmad Umar, (unknown), Luyan Wang, Ahmed A. Ibrahim, (unknown), Sotirios Baskoutas, Meishan Pei, Xiuzhi Zhang	5
11	Unveiling the potential of PANI@MnO2@rGO ternary nanocomposite in energy storage and gas sensing 2023 ·Chemosphere ·Ahmad Umar, Sheikh A. Akbar, Rajesh Kumar, Faheem Ahmed, Sajid Ali Ansari, Ahmed A. Ibrahim, Mohsen A. M. Alhamami, (unknown), Hassan Algadi, Tubia Almas, Wen Zeng	24
12	CeO2 quantum dots decorated g-C3N4 nanosheets: A potential scaffold for fluorescence sensing of heavy metals and visible-light driven photocatalyst 2023 ·Journal of Alloys and Compounds ·Manjot Kaur, (unknown), S.K. Mehta, Sushil Kumar Kansal, Ahmad Umar, Ahmed A. Ibrahim, Sotirios Baskoutas	23
13	Superhydrophobic MOF based materials and their applications for oil-water separation 2023 ·Journal of Cleaner Production ·(unknown), (unknown), Yang Luo, Rui Wu, Rui Fang, Ahmad Umar, Zhongming Zhang, (unknown), Jie Yao, Shuaifei Zhao	54
14	Enhanced water electrolysis performance of bifunctional NiCoP electrocatalyst in alkaline media 2023 ·Journal of Electroanalytical Chemistry ·Dengke Wang, Ahmad Umar, Xiang Wu	14
15	Recent advances and mechanisms of microbial bioremediation of nickel from wastewater 2023 ·Environmental Science and Pollution Research ·(unknown), (unknown), Raman Kumar, (unknown), Ahmad Umar, (unknown), Sotirios Baskoutas	7
16	EVALUATION OF HYPERTENSION AWARENESS AMONG GENERAL POPULATION IN BAHAWALPUR, PAKISTAN: A CROSS SECTIONAL STUDY 2023 ·SHILAP Revista de lepidopterología ·(unknown), Waseem Abbas, (unknown), Ahmad Umar, (unknown), Ijaz ul Haq, Muhammad Junaid	2
17	(NH4)2V10O25.8H2O nanowire materials for stable zinc ion storage 2023 ·Materials Today Chemistry ·Ming Zhao, Shilong Li, Ahmad Umar, Xiang Wu	13
18	Solvatochromism as a Novel Tool to Enumerate the Optical and Luminescence Properties of Plastic Waste Derived Carbon Nanodots and Their Activated Counterparts 2023 ·Nanomaterials ·Savita Chaudhary, Manisha Kumari, Pooja Chauhan, Ganga Ram Chaudhary, Ahmad Umar, Sheikh A. Akbar, Sotirios Baskoutas	2
19	Zinc Oxide/Phosphorus-Doped Carbon Nitride Composite as Potential Scaffold for Electrochemical Detection of Nitrofurantoin 2022 ·Biosensors ·Faheem Ahmed, Thangavelu Kokulnathan, Ahmad Umar, Sheikh A. Akbar, Shalendra Kumar, Nagih M. Shaalan, Nishat Arshi, Mohd Gulfam Alam, Abdullah Aljaafari, Adil Alshoaibi	23
20	An investigation on photoconductivity of non-stoichiometric CuZnSn(S, Se) ₄ thin films for photovoltaic applications 2019 ·Physica Scripta ·H.H. Hegazy, I.M. Ashraf, H. Algarni, Ahmad Umar	3

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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