Synthesis of multifunctional sulfur-nitrogen co-doped carbon quantum dots via facile one-pot microwave-assisted synthesis: applications on antioxidant, antimicrobial activities, and Fe3+ ion sensing

1. Baker SN, Baker GA (2010) Luminescent carbon nanodots: emergent nanolights. Angew Chem Int Ed 49:6726–6744. https://doi.org/10.1002/anie.20090662310.1002/anie.200906623 ↗

2. Georgakilas V, Perman JA, Tucek J, Zboril R (2015) Broad family of carbon nanoallotropes: classification, chemistry, and applications of fullerenes, carbon dots, nanotubes, graphene, nanodiamonds, and combined superstructures. Chem Rev 115:4744–4822. https://doi.org/10.1021/cr500304f10.1021/cr500304f ↗

3. He M, Zhang J, Wang H, Kong Y, Xiao Y, Xu W (2018) Material and optical properties of fluorescent carbon quantum dots fabricated from lemon juice via hydrothermal reaction. Nanoscale Res Lett 13. https://doi.org/10.1186/s11671-018-2581-710.1186/s11671-018-2581-7 ↗

4. Zakharko Y, Graf A, Zaumseil J (2016) Plasmonic crystals for strong light–matter coupling in carbon nanotubes. Nano Lett 16:6504–6510. https://doi.org/10.1021/acs.nanolett.6b0308610.1021/acs.nanolett.6b03086 ↗

5. Michalet X, Pinaud FF, Bentolila LA, Tsay JM, Doose S, Li JJ, Sundaresan G, Wu AM, Gambhir SS, Weiss S (2005) Quantum dots for live cells, in vivo imaging, and diagnostics. Science 307:538–544. https://doi.org/10.1126/science.110427410.1126/science.1104274 ↗

6. Tadesse A, Hagos M, RamaDevi D, Basavaiah K, Belachew N (2020) Fluorescent-nitrogen-doped carbon quantum dots derived from citrus lemon juice: green synthesis, mercury (II) ion sensing, and live cell imaging. ACS Omega 5:3889–3898. https://doi.org/10.1021/acsomega.9b0317510.1021/acsomega.9b03175 ↗

7. Vandarkuzhali SAA, Natarajan S, Jeyabalan S, Sivaraman G, Singaravadivel S, Muthusubramanian S, Viswanathan B (2018) Pineapple peel-derived carbon dots: applications as sensor, molecular keypad lock, and memory device. ACS Omega 3:12584–12592. https://doi.org/10.1021/acsomega.8b0114610.1021/acsomega.8b01146 ↗

8. Feng X, Jiang Y, Zhao J, Miao M, Cao S, Fang J, Shi L (2015) Easy synthesis of photoluminescent N-doped carbon dots from winter melon for bio-imaging. RSC Adv 5:31250–31254. https://doi.org/10.1039/c5ra02271a10.1039/c5ra02271a ↗

9. Kumar VB, Sheinberger J, Porat Z, Shav-Tal Y, Gedanken A (2016) A hydrothermal reaction of an aqueous solution of BSA yields highly fluorescent N doped C-dots used for imaging of live mammalian cells. J Mater Chem B 4:2913–2920. https://doi.org/10.1039/c6tb00519e10.1039/c6tb00519e ↗

10. Zhang Z, Hao J, Zhang J, Zhang B, Tang J (2012) Protein as the source for synthesizing fluorescent carbon dots by a one-pot hydrothermal route. RSC Adv 2:8599. https://doi.org/10.1039/c2ra21217j10.1039/c2ra21217j ↗

11. Liu X, Li T, Hou Y, Wu Q, Yi J, Zhang G (2016) Microwave synthesis of carbon dots with multi-response using denatured proteins as carbon source. RSC Adv 6:11711–11718. https://doi.org/10.1039/c5ra23081k10.1039/c5ra23081k ↗

12. Tang L, Ji R, Cao X, Lin J, Jiang H, Li X, Teng KS, Luk CM, Zeng S, Hao J, Lau SP (2012) Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots. ACS Nano 6:5102–5110. https://doi.org/10.1021/nn300760g10.1021/nn300760g ↗

13. Chowdhury D, Gogoi N, Majumdar G (2012) Fluorescent carbon dots obtained from chitosan gel. RSC Adv 2:12156. https://doi.org/10.1039/c2ra21705h10.1039/c2ra21705h ↗

14. Jiang J, He Y, Li S, Cui H (2012) Amino acids as the source for producing carbon nanodots: microwave assisted one-step synthesis, intrinsic photoluminescence property and intense chemiluminescence enhancement. Chem Commun 48:9634. https://doi.org/10.1039/c2cc34612e10.1039/c2cc34612e ↗

15. Xu HV, Zheng XT, Zhao Y, Tan YN (2018) Uncovering the design principle of amino acid-derived photoluminescent biodots with tailor-made structure–properties and applications for cellular bioimaging. ACS Appl Mater Interfaces 10:19881–19888. https://doi.org/10.1021/acsami.8b0486410.1021/acsami.8b04864 ↗

16. Zheng M, Ruan S, Liu S, Sun T, Qu D, Zhao H, Xie Z, Gao H, Jing X, Sun Z (2015) Self-targeting fluorescent carbon dots for diagnosis of brain cancer cells. ACS Nano 9:11455–11461. https://doi.org/10.1021/acsnano.5b0557510.1021/acsnano.5b05575 ↗

17. Xu Q, Kuang T, Liu Y, Cai L, Peng X, Sreeprasad TS, Zhao P, Yu Z, Li N (2016) Heteroatom-doped carbon dots: synthesis, characterization, properties, photoluminescence mechanism and biological applications. J Mater Chem B 4:7204–7219. https://doi.org/10.1039/c6tb02131j10.1039/c6tb02131j ↗

18. Shi B, Su Y, Zhang L, Huang M, Liu R, Zhao S (2016) Nitrogen and phosphorus co-doped carbon nanodots as a novel fluorescent probe for highly sensitive detection of Fe3+ in human serum and living cells. ACS Appl Mater Interfaces 8:10717–10725. https://doi.org/10.1021/acsami.6b0132510.1021/acsami.6b01325 ↗

19. Dong Y, Pang H, Yang HB, Guo C, Shao J, Chi Y, Li CM, Yu T (2013) Carbon-based dots co-doped with nitrogen and sulfur for high quantum yield and excitation-independent emission. Angew Chem Int Ed 52:7800–7804. https://doi.org/10.1002/anie.20130111410.1002/anie.201301114 ↗

20. Xia Y, Zhu Y, Tang Y (2012) Preparation of sulfur-doped microporous carbons for the storage of hydrogen and carbon dioxide. Carbon 50:5543–5553. https://doi.org/10.1016/j.carbon.2012.07.04410.1016/j.carbon.2012.07.044 ↗

21. Qu D, Zheng M, Du P, Zhou Y, Zhang L, Li D, Tan H, Zhao Z, Xie Z, Sun Z (2013) Highly luminescent S, N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts. Nanoscale 5:12272. https://doi.org/10.1039/c3nr04402e10.1039/c3nr04402e ↗

22. Zheng M, Zhang H, Xiao Y, Dong H, Liu Y, Xu R, Hu Y, Deng B, Lei B, Liu X (2013) Large-scale synthesis and enhanced hydrogen storage of monodispersed sulfur-doped carbon microspheres by hydro-sulfur-thermal carbonization of starch. Mater Lett 109:279–282. https://doi.org/10.1016/j.matlet.2013.05.07310.1016/j.matlet.2013.05.073 ↗

23. Bandosz TJ, Matos J, Seredych M, Islam MSZ, Alfano R (2012) Photoactivity of S-doped nanoporous activated carbons: a new perspective for harvesting solar energy on carbon-based semiconductors. Appl Catal A 445–446:159–165. https://doi.org/10.1016/j.apcata.2012.08.02010.1016/j.apcata.2012.08.020 ↗

24. Yang Z, Yao Z, Li G, Fang G, Nie H, Liu Z, Zhou X, Chen X, Huang S (2011) Sulfur-doped graphene as an efficient metal-free cathode catalyst for oxygen reduction. ACS Nano 6:205–211. https://doi.org/10.1021/nn203393d10.1021/nn203393d ↗

25. Liang J, Jiao Y, Jaroniec M, Qiao SZ (2012) Sulfur and nitrogen dual-doped mesoporous graphene electrocatalyst for oxygen reduction with synergistically enhanced performance. Angew Chem Int Ed 51:11496–11500. https://doi.org/10.1002/anie.20120672010.1002/anie.201206720 ↗

26. Li F, Lu L, Wu Y, Meng L, Zhu B, Xu Q, Zhuang G, Zhuang J (2024) Nitrogen and sulfur co-doped carbon dots for ratiometric fluorometric determination of mercury ions. J Fluoresc. https://doi.org/10.1007/s10895-024-04010-210.1007/s10895-024-04010-2 ↗

27. Fahmi MZ, Sugito SFA, Hanifah NA, Nur’aini UL, Purwanto B, Lee HV (2024) Advance heteroatom dopants nitrogen, boron, sulphur and phosphorus on carbon dots towards histamine detection in fish sample. Sains Malaysiana 53(2):347–358. https://doi.org/10.17576/jsm-2024-5302-0910.17576/jsm-2024-5302-09 ↗

28. Hassan YF, Alzahrani E, Abdel-Lateef MA, Salman BI, Ibrahim AE (2024) Design, characterization and biopharmaceutical applications of novel green boron-carbon quantum dots for quantification of apalutamide; greenness evaluations. J Fluoresc. https://doi.org/10.1007/s10895-024-03802-w10.1007/s10895-024-03802-w ↗

29. Hassan YF, Alzahrani E, Saraya RE, Abdel-Lateef MA, El-Shoura EAM, Batakoushy HA, Ibrahim AE, Farouk A, Abdel-Aal MAA, Salman BI (2024) A promising green fluorimetric approach for analysis of edoxaban in real human plasma using green carbon dots decorated with terbium ions. Chemical Papers. https://doi.org/10.1007/s11696-024-03796-610.1007/s11696-024-03796-6 ↗

30. Salman BI, Hassan AI, Al-Harrasi A, Ibrahim AE, Saraya RE (2024) Copper and nitrogen-doped carbon quantum dots as green nano-probes for fluorimetric determination of delafloxacin; characterization and applications. Anal Chim Acta 1327:343175. https://doi.org/10.1016/j.aca.2024.34317510.1016/j.aca.2024.343175 ↗

31. AlSalem HS, Alharbi SN, Al-Goul ST, Salman BI, Hassan YF, Abdel-Lateef MA (2024) Design of new boron-doped carbon dots for nano-level assay of nebivolol in human plasma and commercial products; application to greenness assessments. Spectrochim Acta Part A Mol Biomol Spectrosc 318:124470. https://doi.org/10.1016/j.saa.2024.12447010.1016/j.saa.2024.124470 ↗

32. Alzahrani E, Salman BI, Hassan AI, Al-Harrasi A, Ibrahim AE, Farouk A, Abdel-Lateef MA (2024) Harnessing new and stable green carbon nanoprobes enables a selective and reliable approach to fluorimetric analysis of favipiravir drug in human plasma. Chem Pap 78(18):9485–9496. https://doi.org/10.1007/s11696-024-03760-410.1007/s11696-024-03760-4 ↗

33. Sarkar S, Gandla D, Venkatesh Y, Bangal PR, Ghosh S, Yang Y, Misra S (2016) Graphene quantum dots from graphite by liquid exfoliation showing excitation-independent emission, fluorescence upconversion and delayed fluorescence. Phys Chem Chem Phys 18:21278–21287. https://doi.org/10.1039/c6cp01528j10.1039/c6cp01528j ↗

34. Li H, He X, Liu Y, Huang H, Lian S, Lee S-T, Kang Z (2010) One-step ultrasonic synthesis of water-soluble carbon nanoparticles with excellent photoluminescent properties. Carbon 49:605–609. https://doi.org/10.1016/j.carbon.2010.10.00410.1016/j.carbon.2010.10.004 ↗

35. Li H, He X, Kang Z, Huang H, Liu Y, Liu J, Lian S, Tsang CHA, Yang X, Lee S (2010) Water-soluble fluorescent carbon quantum dots and photocatalyst design. Angew Chem 122:4532–4536. https://doi.org/10.1002/ange.20090615410.1002/ange.200906154 ↗

36. Rahy A, Zhou C, Zheng J, Park SY, Kim MJ, Jang I, Cho SJ, Yang DJ (2011) Photoluminescent carbon nanoparticles produced by confined combustion of aromatic compounds. Carbon 50:1298–1302. https://doi.org/10.1016/j.carbon.2011.10.05210.1016/j.carbon.2011.10.052 ↗

37. Sarisozen S, Polat N, Balci FM, Guvenc CM, Kocabas C, Yaglioglu HG, Balci S (2022) Strong coupling of carbon quantum dots in liquid crystals. J Phys Chem Lett 13:3562–3570. https://doi.org/10.1021/acs.jpclett.1c0393710.1021/acs.jpclett.1c03937 ↗

38. Wang Z, Cao L, Ding Y, Shi R, Wang X, Lu H, Liu Z, Xiu F, Liu J, Huang W (2017) One-step and green synthesis of nitrogen-doped carbon quantum dots for multifunctional electronics. RSC Adv 7:21969–21973. https://doi.org/10.1039/c7ra03840b10.1039/c7ra03840b ↗

39. Chandra S, Pathan SH, Mitra S, Modha BH, Goswami A, Pramanik P (2012) Tuning of photoluminescence on different surface functionalized carbon quantum dots. RSC Adv 2:3602. https://doi.org/10.1039/c2ra00030j10.1039/c2ra00030j ↗

40. Liu R, Zhang Y, Piao Y, Meng L (2021) Development of nitrogen-doped carbon quantum dots as fluorescent probes for highly selective and sensitive detection of the heavy-ion Fe3+. Carbon Letters. https://doi.org/10.1007/s42823-020-00222-110.1007/s42823-020-00222-1 ↗

41. Wang S, Guo L, Chen L, Wang L, Song Y (2022) Self-exfoliating double-emission N-doped carbon dots in covalent organic frameworks for ratiometric fluorescence “Off–On” Cu2+ detection. ACS Appl Nano Mater 5:1339–1347. https://doi.org/10.1021/acsanm.1c0388910.1021/acsanm.1c03889 ↗

42. Magdy G, Said N, El-Domany RA, Belal F (2022) Nitrogen and sulfur-doped carbon quantum dots as fluorescent nanoprobes for spectrofluorimetric determination of olanzapine and diazepam in biological fluids and dosage forms: application to content uniformity testing. BMC Chemistry 16. https://doi.org/10.1186/s13065-022-00894-y10.1186/s13065-022-00894-y ↗

43. Farid MAA, Lease J, Yoshito A (2024) Lignocellulosic biomass-derived carbon quantum dots (CQDs): a novel approach utilizing organosolv lignin from Moso bamboo waste. J Clean Prod 467:142852. https://doi.org/10.1016/j.jclepro.2024.14285210.1016/j.jclepro.2024.142852 ↗

44. Lohani CR, Lee K-H (2009) The effect of absorbance of Fe3+ on the detection of Fe3+ by fluorescent chemical sensors. Sens Actuators B Chem 143:649–654. https://doi.org/10.1016/j.snb.2009.10.00410.1016/j.snb.2009.10.004 ↗

45. Nazri NAA, Azeman NH, Luo Y, Bakar AAA (2021) Carbon quantum dots for optical sensor applications: a review. Opt Laser Technol 139:106928. https://doi.org/10.1016/j.optlastec.2021.10692810.1016/j.optlastec.2021.106928 ↗

46. Pu Z, Li K, Fan W, Wang Y, Xiao L, Li M (2024) Preparation of fluorescent “on-off-on” carbon quantum dots and their application to the detection of Fe3+ and ascorbic acid and information encryption. J Fluoresc. https://doi.org/10.1007/s10895-024-03892-610.1007/s10895-024-03892-6 ↗

47. Ding S, Gao Y, Ni B, Yang X (2021) Green synthesis of biomass-derived carbon quantum dots as fluorescent probe for Fe3+ detection. Inorg Chem Commun 130:108636. https://doi.org/10.1016/j.inoche.2021.10863610.1016/j.inoche.2021.108636 ↗

48. Šafranko S, Stanković A, Hajra S, Kim H-J, Strelec I, Dutour-Sikirić M, Weber I, Bosnar MH, Grbčić P, Pavelić SK, Széchenyi A, Mishra YK, Jerković I, Jokić S (2021) Preparation of multifunctional N-doped carbon quantum dots from Citrus clementina peel: investigating targeted pharmacological activities and the potential application for Fe3+ sensing. Pharmaceuticals 14:857. https://doi.org/10.3390/ph1409085710.3390/ph14090857 ↗

49. Qureashi A, Pandith AH, Bashir A, Malik LA (2021) Biomass-derived carbon quantum dots: a novel and sustainable fluorescent “ON–OFF–ON” sensor for ferric ions. Anal Methods 13:4756–4766. https://doi.org/10.1039/d1ay01112j10.1039/d1ay01112j ↗

50. Shabbir H, Csapó E, Wojnicki M (2023) Carbon quantum dots: the role of surface functional groups and proposed mechanisms for metal ion sensing. Inorganics 11:262. https://doi.org/10.3390/inorganics1106026210.3390/inorganics11060262 ↗

51. Goswami T, Rolfs A, Hediger MA (2002) Iron transport: emerging roles in health and disease. Biochem Cell Biol 80:679–689. https://doi.org/10.1139/o02-15910.1139/o02-159 ↗

52. Ngole-Jeme VM, Ekosse G-IE, Songca SP (2016) An analysis of human exposure to trace elements from deliberate soil ingestion and associated health risks. J Eposure Sci Environ Epidemiol 28:55–63. https://doi.org/10.1038/jes.2016.6710.1038/jes.2016.67 ↗

53. Zhou M, Zhou Z, Gong A, Zhang Y, Li Q (2015) Synthesis of highly photoluminescent carbon dots via citric acid and Tris for iron(III) ions sensors and bioimaging. Talanta 143:107–113. https://doi.org/10.1016/j.talanta.2015.04.01510.1016/j.talanta.2015.04.015 ↗

54. Chung JY, Kim H-S, Song J (2018) Iron metabolism in diabetes-induced Alzheimer’s disease: a focus on insulin resistance in the brain. Biometals 31:705–714. https://doi.org/10.1007/s10534-018-0134-210.1007/s10534-018-0134-2 ↗

55. Kim Y-O, Chung H-J, Kong H-S, Choi D-W, Cho D-H (1999) The application of Ion chromatographic method for bioavailability and stability test of iron preparations. Arch Pharmacal Res 22:288–293. https://doi.org/10.1007/bf0297636410.1007/bf02976364 ↗

56. Son MH, Park SW, Jung YK (2021) Antioxidant and anti-aging carbon quantum dots using tannic acid. Nanotechnology 32:415102. https://doi.org/10.1088/1361-6528/ac027b10.1088/1361-6528/ac027b ↗

57. Singh AK, Itkor P, Lee M, Saenjaiban A, Lee YS (2024) Synergistic integration of carbon quantum dots in biopolymer matrices: an overview of current advancements in antioxidant and antimicrobial active packaging. Molecules 29:5138. https://doi.org/10.3390/molecules2921513810.3390/molecules29215138 ↗

58. Li J, Hu Z-E, We Y-J, Liu Y-H, Wang N, Yu X-Q (2021) Multifunctional carbon quantum dots as a theranostic nanomedicine for fluorescence imaging-guided glutathione depletion to improve chemodynamic therapy. J Colloid Interface Sci 606:1219–1228. https://doi.org/10.1016/j.jcis.2021.08.11410.1016/j.jcis.2021.08.114 ↗

59. Zhao D, Zhang R, Liu X, Li X, Xu M, Huang X, Xiao X (2022) Screening of chitosan derivatives-carbon dots based on antibacterial activity and application in anti-Staphylococcus aureus biofilm. Int J Nanomed 17:937–952. https://doi.org/10.2147/ijn.s35073910.2147/ijn.s350739 ↗

60. Sun B, Wu F, Zhang Q, Chu X, Wang Z, Huang X, Li J, Yao C, Zhou N, Shen J (2020) Insight into the effect of particle size distribution differences on the antibacterial activity of carbon dots. J Colloid Interface Sci 584:505–519. https://doi.org/10.1016/j.jcis.2020.10.01510.1016/j.jcis.2020.10.015 ↗

61. Esfandiari N, Bagheri Z, Ehtesabi H, Fatahi Z, Tavana H, Latifi H (2019) Effect of carbonization degree of carbon dots on cytotoxicity and photo-induced toxicity to cells. Heliyon 5:e02940. https://doi.org/10.1016/j.heliyon.2019.e0294010.1016/j.heliyon.2019.e02940 ↗

62. Li H, Su D, Gao H, Yan X, Kong D, Jin R, Liu X, Wang C, Lu G (2020) Design of red emissive carbon dots: robust performance for analytical applications in pesticide monitoring. Anal Chem 92:3198–3205. https://doi.org/10.1021/acs.analchem.9b0491710.1021/acs.analchem.9b04917 ↗

63. Gedda G, Sankaranarayanan SA, Putta CL, Gudimella KK, Rengan AK, Girma WM (2023) Green synthesis of multi-functional carbon dots from medicinal plant leaves for antimicrobial, antioxidant, and bioimaging applications. Scientific Reports 13. https://doi.org/10.1038/s41598-023-33652-810.1038/s41598-023-33652-8 ↗

64. Karthik M, Ragunath C, Krishnasamy P, Paulraj DQ, Ramasubramanian V (2023) Green synthesis of zinc oxide nanoparticles using Annona muricata leaf extract and its antioxidant and antibacterial activity. Inorg Chem Commun 157:111422. https://doi.org/10.1016/j.inoche.2023.11142210.1016/j.inoche.2023.111422 ↗

65. Sakat S, Juvekar A, Gambhire M (2010) In-vitro antioxidant and anti-inflammatory activity of methanol extract of oxalis corniculata linn. Available at: https://api.semanticscholar.org/CorpusID:9875110010.1055/s-0029-1234983 ↗

66. Pandey A, Devkota A, Yadegari Z, Dumenyo K, Taheri A (2021) Antibacterial properties of citric acid/β-alanine carbon dots against Gram-negative bacteria. Nanomaterials 11:2012. https://doi.org/10.3390/nano1108201210.3390/nano11082012 ↗

67. Pandey A, Devkota A, Sigdel A, Yadegari Z, Dumenyo K, Taheri A (2021) Citric acid/β-alanine carbon dots as a novel tool for delivery of plasmid DNA into E. coli cells. Scientific Reports 11. https://doi.org/10.1038/s41598-021-03437-y10.1038/s41598-021-03437-y ↗

68. Sree GS, Ranjitha KVB, Reddy BJM, Mohan BS, Kant CR (2023) Fabrication of RGO based bimetal oxides ternary composite for deterioration of handloom dye and pathogens from polluted water. Inorg Chem Commun 155:111054. https://doi.org/10.1016/j.inoche.2023.11105410.1016/j.inoche.2023.111054 ↗

69. Zhou H, Ren Y, Li Z, He W, Li Z (2022) Selective detection of Fe3+ by nitrogen–sulfur-doped carbon dots using thiourea and citric acid. Coatings 12:1042. https://doi.org/10.3390/coatings1208104210.3390/coatings12081042 ↗

70. Miao X, Yan X, Qu D, Li D, Tao FF, Sun Z (2017) Red emissive sulfur, nitrogen codoped carbon dots and their application in ion detection and theraonostics. ACS Appl Mater Interfaces 9:18549–18556. https://doi.org/10.1021/acsami.7b0451410.1021/acsami.7b04514 ↗

71. Shan F, Xia H, Xie X, Fu L, Yang H, Zhou Q, Zhang Y, Wang Z, Yu X (2021) Novel N-doped carbon dots prepared via citric acid and benzoylurea by green synthesis for high selectivity Fe(III) sensing and imaging in living cells. Microchem J 167:106273. https://doi.org/10.1016/j.microc.2021.10627310.1016/j.microc.2021.106273 ↗

72. Tepakidareekul M, Uematsu T, Kuwabata S (2022) Synthesis of multicolor-emitting nitrogen–sulfur co-doped carbon dots and their photochemical studies for sensing applications. RSC Adv 12:20054–20061. https://doi.org/10.1039/d2ra03073j10.1039/d2ra03073j ↗

73. Chan KK, Yang C, Chien Y-H, Panwar N, Yong K-T (2019) A facile synthesis of label-free carbon dots with unique selectivity-tunable characteristics for ferric ion detection and cellular imaging applications. New J Chem 43:4734–4744. https://doi.org/10.1039/c8nj06306k10.1039/c8nj06306k ↗

74. Das D, Dutta RK (2021) N-doped carbon dots synthesized from ethylene glycol and β-Alanine for detection of Cr(VI) and 4-Nitrophenol via photoluminescence quenching. ACS Appl Nano Mater 4:3444–3454. https://doi.org/10.1021/acsanm.0c0332910.1021/acsanm.0c03329 ↗

75. Ding H, Wei J, Zhang P, Zhou Z, Gao Q, Xiong H (2018) Solvent‐controlled synthesis of highly luminescent carbon dots with a wide color gamut and narrowed emission peak widths. Small 14. https://doi.org/10.1002/smll.20180061210.1002/smll.201800612 ↗

76. Wei J-M, Liu B-T, Zhang X, Song C-C (2018) One-pot synthesis of N, S co-doped photoluminescent carbon quantum dots for Hg2+ ion detection. New Carbon Mater 33:333–340. https://doi.org/10.1016/s1872-5805(18)60343-910.1016/s1872-5805(18)60343-9 ↗

77. Kolanowska A, Dzido G, Krzywiecki M, Tomczyk MM, Łukowiec D, Ruczka S, Boncel S (2022) Carbon quantum dots from amino acids revisited: survey of renewable precursors toward high quantum-yield blue and green fluorescence. ACS Omega 7:41165–41176. https://doi.org/10.1021/acsomega.2c0475110.1021/acsomega.2c04751 ↗

78. Liu J, Geng Y, Li D, Yao H, Huo Z, Li Y, Zhang K, Zhu S, Wei H, Xu W, Jiang J, Yang B (2020) Deep red emissive carbonized polymer dots with unprecedented narrow full width at half maximum. Advanced Materials 32. https://doi.org/10.1002/adma.20190664110.1002/adma.201906641 ↗

79. Shaikh AF, Tamboli MS, Patil RH, Bhan A, Ambekar JD, Kale BB (2018) Bioinspired carbon quantum dots: an antibiofilm agents. J Nanosci Nanotechnol 19:2339–2345. https://doi.org/10.1166/jnn.2019.1653710.1166/jnn.2019.16537 ↗

80. Genc R, Alas MO, Harputlu E, Repp S, Kremer N, Castellano M, Colak SG, Ocakoglu K, Erdem E (2017) High-capacitance hybrid supercapacitor based on multi-colored fluorescent carbon-dots. Scientific Reports 7. https://doi.org/10.1038/s41598-017-11347-110.1038/s41598-017-11347-1 ↗

81. Qu D, Sun Z, Zheng M, Li J, Zhang Y, Zhang G, Zhao H, Liu X, Xie Z (2015) Three colors emission from S, N Co-doped graphene quantum dots for visible light H2 production and bioimaging. Adv Optical Mater 3:360–367. https://doi.org/10.1002/adom.20140054910.1002/adom.201400549 ↗

82. Magde D, Rojas GE, Seybold PG (1999) Solvent dependence of the fluorescence lifetimes of xanthene dyes. Photochem Photobiol 70:737–744. https://doi.org/10.1111/j.1751-1097.1999.tb08277.x10.1111/j.1751-1097.1999.tb08277.x ↗

83. Ding H, Ji Y, Wei J-S, Gao Q-Y, Zhou Z-Y, Xiong H-M (2017) Facile synthesis of red-emitting carbon dots from pulp-free lemon juice for bioimaging. J Mater Chem B 5:5272–5277. https://doi.org/10.1039/c7tb01130j10.1039/c7tb01130j ↗

84. Koç ÖK, Üzer A, Apak R (2022) High quantum yield nitrogen-doped carbon quantum dot-based fluorescent probes for selective sensing of 2,4,6-trinitrotoluene. ACS Appl Nano Mater 5:5868–5881. https://doi.org/10.1021/acsanm.2c0071710.1021/acsanm.2c00717 ↗

85. Abinaya K, Rajkishore SK, Lakshmanan A, Anandham R, Dhananchezhiyan P, Praghadeesh M (2021) Synthesis and characterization of carbon dots from coconut shell by optimizing the hydrothermal carbonization process. J Appl Natural Sci 13:1151–1157. https://doi.org/10.31018/jans.v13i4.291610.31018/jans.v13i4.2916 ↗

86. Tohamy H-AS, El-Sakhawy M, Kamel S (2023) Microwave-assisted synthesis of amphoteric fluorescence carbon quantum dots and their chromium adsorption from aqueous solution. Scientific Reports 13. https://doi.org/10.1038/s41598-023-37894-4.10.1038/s41598-023-37894-4 ↗

87. Kechagias A, Lykos C, Karabagias VK, Georgopoulos S, Sakavitsi V, Leontiou A, Salmas CE, Giannakas AE, Konstantinou I (2023) Development and characterization of N/S-carbon quantum dots by valorizing greek crayfish food waste. Appl Sci 13:8730. https://doi.org/10.3390/app1315873010.3390/app13158730 ↗

88. Dua S, Kumar P, Pani B, Kaur A, Khanna M, Bhatt G (2023) Stability of carbon quantum dots: a critical review. RSC Adv 13:13845–13861. https://doi.org/10.1039/d2ra07180k10.1039/d2ra07180k ↗

89. Zhu S, Meng Q, Wang L, Zhang J, Song Y, Jin H, Zhang K, Sun H, Wang H, Yang B (2013) Highly photoluminescent carbon dots for multicolor patterning, sensors, and bioimaging. Angew Chem Int Ed 52:3953–3957. https://doi.org/10.1002/anie.20130051910.1002/anie.201300519 ↗

90. Shang J, Ma L, Li J, Ai W, Yu T, Gurzadyan GG (2012) The origin of fluorescence from graphene oxide. Scientific Reports 2. https://doi.org/10.1038/srep0079210.1038/srep00792 ↗

91. Wang D, Wang L, Dong X, Shi Z, Jin J (2012) Chemically tailoring graphene oxides into fluorescent nanosheets for Fe3+ ion detection. Carbon 50:2147–2154. https://doi.org/10.1016/j.carbon.2012.01.02110.1016/j.carbon.2012.01.021 ↗

92. Wesp EF, Brode WR (1934) The absorption spectra of ferric compounds. I. The Ferric Chloride—Phenol Reaction. J Am Chem Soc 56:1037–1042. https://doi.org/10.1021/ja01320a00910.1021/ja01320a009 ↗

93. Qiao G, Chen G, Wen Q, Liu W, Gao J, Yu Z, Wang Q (2020) Rapid conversion from common precursors to carbon dots in large scale: spectral controls, optical sensing, cellular imaging and LEDs application. J Colloid Interface Sci 580:88–98. https://doi.org/10.1016/j.jcis.2020.07.03410.1016/j.jcis.2020.07.034 ↗

94. Chahal S, Yousefi N, Tufenkji N (2020) Green synthesis of high quantum yield carbon dots from phenylalanine and citric acid: role of stoichiometry and nitrogen doping. ACS Sustain Chem Eng 8:5566–5575. https://doi.org/10.1021/acssuschemeng.9b0746310.1021/acssuschemeng.9b07463 ↗

95. Nagaraj M, Ramalingam S, Murugan C, Aldawood S, Jin J-O, Choi I, Kim M (2022) Detection of Fe3+ ions in aqueous environment using fluorescent carbon quantum dots synthesized from endosperm of Borassus flabellifer. Environ Res 212:113273. https://doi.org/10.1016/j.envres.2022.11327310.1016/j.envres.2022.113273 ↗

96. Qiu Y, Li D, Li Y, Ma X, Li J (2021) Green carbon quantum dots from sustainable lignocellulosic biomass and its application in the detection of Fe3+. Cellulose 29:367–378. https://doi.org/10.1007/s10570-021-04314-710.1007/s10570-021-04314-7 ↗

97. Atchudan R, Perumal S, Edison TNJI, Sundramoorthy AK, Vinodh R, Sangaraju S, Kishore SC, Lee YR (2023) Natural nitrogen-doped carbon dots obtained from hydrothermal carbonization of chebulic myrobalan and their sensing ability toward heavy metal ions. Sensors 23:787. https://doi.org/10.3390/s2302078710.3390/s23020787 ↗

98. Zhu L, Shen D, Liu Q, Wu C, Gu S (2021) Sustainable synthesis of bright green fluorescent carbon quantum dots from lignin for highly sensitive detection of Fe3+ ions. Appl Surf Sci 565:150526. https://doi.org/10.1016/j.apsusc.2021.15052610.1016/j.apsusc.2021.150526 ↗

99. Zhao S, Song X, Chai X, Zhao P, He H, Liu Z (2020) Green production of fluorescent carbon quantum dots based on pine wood and its application in the detection of Fe3+. J Clean Prod 263:121561. https://doi.org/10.1016/j.jclepro.2020.12156110.1016/j.jclepro.2020.121561 ↗

100. Varghese M, Balachandran M (2021) Antibacterial efficiency of carbon dots against Gram-positive and Gram-negative bacteria: a review. J Environ Chem Eng 9:106821. https://doi.org/10.1016/j.jece.2021.10682110.1016/j.jece.2021.106821 ↗