Ajay Kumar

6.5k total citations · 3 hit papers
100 papers, 5.2k citations indexed

About

Ajay Kumar is a scholar working on Materials Chemistry, Renewable Energy, Sustainability and the Environment and Organic Chemistry. According to data from OpenAlex, Ajay Kumar has authored 100 papers receiving a total of 5.2k indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Materials Chemistry, 35 papers in Renewable Energy, Sustainability and the Environment and 31 papers in Organic Chemistry. Recurrent topics in Ajay Kumar's work include Advanced Photocatalysis Techniques (33 papers), Synthesis and biological activity (17 papers) and Gas Sensing Nanomaterials and Sensors (11 papers). Ajay Kumar is often cited by papers focused on Advanced Photocatalysis Techniques (33 papers), Synthesis and biological activity (17 papers) and Gas Sensing Nanomaterials and Sensors (11 papers). Ajay Kumar collaborates with scholars based in India, United States and United Kingdom. Ajay Kumar's co-authors include Venkata Krishnan, Ashish Kumar, Suneel Kumar, Priyanka Choudhary, Ashish Bahuguna, Pedro H. C. Camargo, Vipul Sharma, R. Mohan Sankaran, Om Prakash and Kumbam Lingeshwar Reddy and has published in prestigious journals such as Angewandte Chemie International Edition, Nature Communications and Journal of Applied Physics.

In The Last Decade

Ajay Kumar

96 papers receiving 5.1k citations

Hit 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.

Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis

2020 516 citations Ajay Kumar, Venkata Krishnan et al. profile →
Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

2021 382 citations Vasudha Hasija, Van‐Huy Nguyen et al. Journal of Hazardous Materials profile →
Recent Advances in Plasmonic Photocatalysis Based on TiO₂ and Noble Metal Nanoparticles for Energy Conversion, Environmental Remediation, and Organic Synthesis

2021 332 citations Ajay Kumar, Venkata Krishnan et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ajay Kumar India	40	3.0k	2.8k	1.4k	912	642	100	5.2k
Ujjwal Pal India	38	3.2k 1.1×	2.7k 1.0×	1.3k 1.0×	725 0.8×	403 0.6×	155	5.0k
Zhongyu Li China	44	4.5k 1.5×	3.8k 1.4×	1.9k 1.4×	1.1k 1.2×	452 0.7×	234	6.5k
Michele Melchionna Italy	35	4.1k 1.4×	2.9k 1.0×	1.7k 1.3×	1.2k 1.3×	595 0.9×	94	6.5k
Jun Fan China	51	5.4k 1.8×	4.4k 1.6×	2.1k 1.5×	933 1.0×	744 1.2×	151	7.7k
Wei Qi China	44	3.7k 1.3×	2.4k 0.8×	1.9k 1.4×	1.2k 1.4×	792 1.2×	217	6.7k
José M. Campos‐Martín Spain	40	4.3k 1.4×	2.5k 0.9×	1.5k 1.1×	1.5k 1.7×	1.2k 1.9×	117	7.1k
Ralph Kraehnert Germany	41	3.6k 1.2×	2.7k 1.0×	2.2k 1.7×	689 0.8×	902 1.4×	102	6.7k
Qing‐Jiang Pan China	40	4.1k 1.4×	2.8k 1.0×	2.0k 1.5×	847 0.9×	577 0.9×	231	6.4k
Guangsheng Pang China	34	2.4k 0.8×	1.1k 0.4×	1.4k 1.0×	649 0.7×	486 0.8×	130	4.2k

Countries citing papers authored by Ajay Kumar

Since Specialization

Citations

This map shows the geographic impact of Ajay Kumar'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 Ajay Kumar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ajay Kumar more than expected).

Fields of papers citing papers by Ajay Kumar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ajay Kumar. 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 Ajay Kumar. The network helps show where Ajay Kumar may publish in the future.

Co-authorship network of co-authors of Ajay Kumar

This figure shows the co-authorship network connecting the top 25 collaborators of Ajay Kumar. A scholar is included among the top collaborators of Ajay Kumar 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 Ajay Kumar. Ajay Kumar is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Gupta, Shruti, et al.. (2025). Exploring borophene: pioneering trends in energy storage materials. Journal of Nanoparticle Research. 27(3). 4 indexed citations

Varagnolo, Silvia, Ajay Kumar, Pranay Ranjan, et al.. (2025). Surface Engineering of Borophene as Next‐Generation Materials for Energy and Environmental Applications. Energy & environment materials. 8(3). 14 indexed citations

Sharma, Indu, et al.. (2024). Dual-functional luminescent Zn-MOF@MCHS nanocomposite for TNP detection and copper(II) adsorptive removal. Separation and Purification Technology. 355. 129538–129538. 20 indexed citations

Kumar, Ajay, et al.. (2024). Recent advances in MOF-based composites for the detection and adsorptive removal of Pb(II) ions in aqueous phase. Materials Today Sustainability. 29. 101057–101057. 15 indexed citations

Singh, Raj, et al.. (2024). Mapping the Influence of the COVID-19 Pandemic on the Indian Economy : Insights from the Smart PLS-SEM Approach with IPMA. Indian Journal of Finance. 18(7). 25–25. 2 indexed citations

Chand, Hushan, et al.. (2023). Comparison of catalytic activity of graphitic carbon nitrides derived from different precursors for carbon dioxide conversion. Fuel. 357. 129757–129757. 39 indexed citations

Jha, Ranjana, et al.. (2022). Synthesis and characterisation of Nickel oxide nanoparticles using CTAB as capping agent. Materials Today Proceedings. 73. 333–336. 8 indexed citations

Hasija, Vasudha, Van‐Huy Nguyen, Ajay Kumar, et al.. (2021). Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review. Journal of Hazardous Materials. 413. 125324–125324. 382 indexed citations breakdown →

Jain, Abhishek, Ajay Kumar, Harpreet Kaur, & Venkata Krishnan. (2020). Strategic combination of ultra violet-visible-near infrared light active materials towards maximum utilization of full solar spectrum for photocatalytic chromium reduction. Chemosphere. 267. 128884–128884. 60 indexed citations

10.

Kaur, Harpreet, et al.. (2018). Trifunctional metal–organic platform for environmental remediation: structural features with peripheral hydroxyl groups facilitate adsorption, degradation and reduction processes. Dalton Transactions. 48(3). 915–927. 103 indexed citations

11.

Reddy, Kumbam Lingeshwar, Peeyush Sharma, Ashutosh Singh, et al.. (2018). Amine-functionalized, porous silica-coated NaYF4:Yb/Er upconversion nanophosphors for efficient delivery of doxorubicin and curcumin. Materials Science and Engineering C. 96. 86–95. 37 indexed citations

12.

Kumar, Ajay, et al.. (2017). I2P air purifier with air quality monitoring device. 478–481. 9 indexed citations

13.

Padmanabhan, Parasuraman, Ajay Kumar, Sundramurthy Kumar, Ravi Chaudhary, & Balázs Gulyás. (2016). Nanoparticles in practice for molecular-imaging applications: An overview. Acta Biomaterialia. 41. 1–16. 181 indexed citations

14.

Aggarwal, Ranjana, et al.. (2015). Molecular docking design and one-pot expeditious synthesis of novel 2,5-diarylpyrazolo[1,5-a]pyrimidin-7-amines as anti-inflammatory agents. European Journal of Medicinal Chemistry. 101. 326–333. 26 indexed citations

15.

Sow, Mamadou, et al.. (2012). Strain‐Induced Reversal of Charge Transfer in Contact Electrification. Angewandte Chemie International Edition. 51(11). 2695–2697. 66 indexed citations

16.

Kumar, Ajay, et al.. (2007). Dehydroacetic acid and its derivatives in organic synthesis : Synthesis of some new 2-substituted-4-(5-bromo-4-hydroxy-6 -methyl -2H -pyran -2 -one -3 -yl )thiazoles. Indian Journal of Chemistry Section B-organic Chemistry Including Medicinal Chemistry. 46(10). 1713–1715. 7 indexed citations

17.

Delhi, et al.. (2006). Delhi human development report 2006 : partnerships for progress. Oxford University Press eBooks. 7 indexed citations

18.

Prakash, Om, et al.. (2006). Iodine (III) mediated synthesis of new 5-aryl-3-(4-hydroxy-6-methyl-2H-pyran-2-oxo-3-yl)-1-phenylpyrazoles from dehydrogenation of 5-aryl-3-(4-hydroxy-6-methyl-2H-pyran-2-oxo-3-yl)-1-phenylpyrazolines. Indian Journal of Chemistry Section B-organic Chemistry Including Medicinal Chemistry. 45(2). 456–460. 1 indexed citations

19.

Fukuda‐Parr, Sakiko & Ajay Kumar. (2004). Readings in human development : concepts, measures and policies for a development paradigm. Oxford University Press eBooks. 98 indexed citations

20.

Kumar, Ajay, Sanjay V. Malhotra, Archana Vats, et al.. (2002). Chemical transformations on 6-aryl-3-cyano-4-methylthio-pyran-2( H )-ones: Synthetic and structural studies on novel N-phenylpyrazoles and N- phenylpyrazolylcoumarins. Research at the University of Copenhagen (University of Copenhagen). 41(2). 360–367. 1 indexed citations

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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