1
|
Paul P, Roy H, Bhattacharjee G, Baruah N, Kundu LM. Amine-Rich Carbon Dots Synthesized from Kappa-Carrageenan and l-Lysine as a Dual Probe for Detection of Folic Acid and Tumor-Targeted Delivery of Therapeutics. ACS APPLIED BIO MATERIALS 2024; 7:6034-6043. [PMID: 39180146 DOI: 10.1021/acsabm.4c00678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2024]
Abstract
Strategically designed, heteroatom-rich surface functionalized blue fluorescent carbon dots (CDs) were synthesized for high-throughput detection of folic acid (vitamin B9). The highly stable CDs could particularly detect vitamin B9 in the presence of 35 analytes, even up to 40 nM of the vitamin. The versatile CDs were found to have a high affinity for folic acid in wastewater, folic acid tablets, and food samples enriched with folic acid. The hemocompatibility of the CDs was also studied by using a hemolysis assay, confirming the CDs to be nontoxic to human blood samples up to 400 μg/mL. The CDs were then covalently conjugated to biotin, which possesses receptors that are overexpressed in tumor cells. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide dye) assay and confocal bioimaging studies proved the biotin-modified CDs (CDBT) were remarkably nontoxic in healthy cell lines (HEK-293) and highly target-specific toward tumor cells (HeLa), including triple-negative breast cancer cells (MDA-MB-231). The cytotoxicity assay of 5-fluorouracil encapsulated CDs (CDBTFu) showed the IC50 value to be 81 μM in HeLa cells and 185 μM in MDA-MB-231 cells, respectively, and significantly higher in HEK-293 cells (over 300 μM), owing to high specificity toward tumor cells.
Collapse
Affiliation(s)
- Pallabi Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Hirakjyoti Roy
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Gourav Bhattacharjee
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Neeharika Baruah
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Lal Mohan Kundu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| |
Collapse
|
2
|
Cheng Y, Zhang F, Zhao Y, Chen J, Yao W, Qian H. A "turn-on" fluorescence sensor for hydroquinone detection based on BSA doped carbon dots (BSA@CDs) from crawfish shells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 325:125100. [PMID: 39260239 DOI: 10.1016/j.saa.2024.125100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 07/06/2024] [Accepted: 09/04/2024] [Indexed: 09/13/2024]
Abstract
By using crawfish shells as the precursor and hydrothermal synthesis, Bovine serum albumin doped carbon dots (BSA@CDs) were prepared without excessive chemical reagents. The relationship between the fluorescence properties of different BSA@CDs and BSA amount was investigated by variouscharacterization techniques. When the amount of BSA added was 30 %, the prepared BSA@CDs' quantum yield (QY) reached 25.01 %, which was the highest. Inner Filter Effect (IFE) suggested that Cr (VI) can selectively quench the fluorescence of BSA@CDs. Cr (VI) can be reduced to Cr (III) by Hydroquinone (HQ), thus recovering the fluorescence. Accordingly, using BSA@CDs as a probe, a "turn-on" fluorescence sensor applied in HQ determination was constructed. The linear range was 10-200 µmol/L and limit of detection (LOD) was 0.18 µmol/L. Further, it has been employed to the determination of HQ in both crawfish tail meat and aquaculture water with good performance.
Collapse
Affiliation(s)
- Yuliang Cheng
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China.
| | - Fan Zhang
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China
| | - Yajie Zhao
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China
| | - Jiannan Chen
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China
| | - Weirong Yao
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China
| | - He Qian
- State Key Laboratory of Food Science and Resources, School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu Province, 214122, PR China
| |
Collapse
|
3
|
Sarath Kumar CB, Reji RP, Sivalingam Y, Kawazoe Y, Surya VJ. Carbon and boron nitride quantum dots as optical sensor probes for selective detection of toxic metals in drinking water: a quantum chemical prediction through structure- and morphology-dependent electronic and optical properties. RSC Adv 2024; 14:28182-28200. [PMID: 39234523 PMCID: PMC11372860 DOI: 10.1039/d4ra04843a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Accepted: 08/12/2024] [Indexed: 09/06/2024] Open
Abstract
Toxic metals present in drinking water pose a serious threat to the environment and human beings when present in abundance. In this work, we investigated the sensing ability of quantum dots (pristine CQDs, boron/nitrogen/sulphur (B/N/S)-doped CQDs, and BNQDs) of various sizes and morphologies (rectangular, circular, and triangular) towards toxic metals such as arsenic (As), cobalt (Co), nickel (Ni), copper (Cu), and lead (Pb) using quantum chemical density functional theory calculations in both gas and water phases. We probed the structural, electronic, and optical properties of the QDs. All the modelled QDs are energetically stable. Frontier molecular orbital analysis predicted that BNQDs are more chemically stable than all other CQDs. UV-vis absorption and Raman spectra analyses helped to understand the optical properties of all the QDs. Further, adsorption studies revealed that triangular pristine CQDs and sulphur-doped CQDs show higher adsorption affinity towards the toxic metals. The magnitude of adsorption energies follows the trend Ni > Pb > As > Cu > Co in most of the QDs. Several pristine and doped CQDs exhibited chemisorption towards the toxic metals, and hence, they can be used as adsorbents. However, a majority of BNQDs showed physisorption towards the metals, and therefore, they can be used as efficient optical sensors compared to CQDs. Further, the sensing ability of the QDs was explored through optical phenomena such as changes in UV-vis absorption spectra and fluorescence after metal adsorption. When compared to pristine CQDs and B/N/S-doped CQDs, metal complexation caused significant changes in the UV-vis absorbance peak intensities in BNQDs along with peak shifts. Moreover, metal interaction with the QDs increased their fluorescence lifetime with the highest values observed in Co-adsorbed triangular H18C46 (152.30 ns), Pb-adsorbed rectangular H15C30S (21.29 ns), and As-adsorbed circular B27N27H18 (2.99 μs) among pristine CQDs, B/N/S-doped CQDs, and BNQDs, respectively. Overall, we believe that our first-of-its-kind computational prediction of the optical sensing ability of tailor-made zero-dimensional systems such as QDs will be a great aid for experimentalists in designing novel and rapid optical probes to detect toxic metals in drinking water.
Collapse
Affiliation(s)
- Chedharla Balaji Sarath Kumar
- Novel, Advanced, and Applied Materials (NAAM) Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur 603203 Tamil Nadu India
| | - Rence Painappallil Reji
- Novel, Advanced, and Applied Materials (NAAM) Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur 603203 Tamil Nadu India
| | - Yuvaraj Sivalingam
- Laboratory of Sensors, Energy and Electronic Devices (Lab SEED), Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur 603203 Tamil Nadu India
- Computer, Electrical and Mathematical Sciences and Engineering Division (CEMSE), King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Yoshiyuki Kawazoe
- New Industry Creation Hatchery Center, Tohoku University Aoba-ku, Miyagi Sendai 980-8579 Japan
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur 603203 Tamil Nadu India
| | - Velappa Jayaraman Surya
- Novel, Advanced, and Applied Materials (NAAM) Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur 603203 Tamil Nadu India
- New Industry Creation Hatchery Center, Tohoku University Aoba-ku, Miyagi Sendai 980-8579 Japan
| |
Collapse
|
4
|
Kong J, Wei Y, Zhou F, Shi L, Zhao S, Wan M, Zhang X. Carbon Quantum Dots: Properties, Preparation, and Applications. Molecules 2024; 29:2002. [PMID: 38731492 PMCID: PMC11085940 DOI: 10.3390/molecules29092002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/13/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Carbon quantum dots are a novel form of carbon material. They offer numerous benefits including particle size adjustability, light resistance, ease of functionalization, low toxicity, excellent biocompatibility, and high-water solubility, as well as their easy accessibility of raw materials. Carbon quantum dots have been widely used in various fields. The preparation methods employed are predominantly top-down methods such as arc discharge, laser ablation, electrochemical and chemical oxidation, as well as bottom-up methods such as templates, microwave, and hydrothermal techniques. This article provides an overview of the properties, preparation methods, raw materials for preparation, and the heteroatom doping of carbon quantum dots, and it summarizes the applications in related fields, such as optoelectronics, bioimaging, drug delivery, cancer therapy, sensors, and environmental remediation. Finally, currently encountered issues of carbon quantum dots are presented. The latest research progress in synthesis and application, as well as the challenges outlined in this review, can help and encourage future research on carbon quantum dots.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Xiangfeng Zhang
- School of Medicine, Henan Polytechnic University, Jiaozuo 454000, China; (Y.W.); (F.Z.); (L.S.); (S.Z.); (M.W.)
| |
Collapse
|
5
|
Wu P, Liu H, Xie Z, Xie L, Liu G, Xu Y, Chen J, Lu CZ. Excellent Charge Separation of NCQDs/ZnS Nanocomposites for the Promotion of Photocatalytic H 2 Evolution. ACS APPLIED MATERIALS & INTERFACES 2024; 16:16601-16611. [PMID: 38502203 DOI: 10.1021/acsami.3c15957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Carbon Quantum dots (CQDs) are widely studied because of their good optical and electronic characteristics and because they can easily generate photocarriers. Nitrogen-doped CQDs (NCQDs) may exhibit improved hydrophilic, optical, and electron-transfer properties, which are conducive to photocatalytic hydrogen evolution. In this paper, NCQD-modified ZnS catalysts were successfully prepared. Under the irradiation of the full spectrum, the H2 evolution rate of the optimal catalyst 0.25 wt % NCQDs/ZnS achieves 5.70 mmol g-1 h-1, which is 11.88, 43.84, and 5.14 times the values of ZnS (0.48 mmol g-1 h-1), NCQDs (0.13 mmol g-1 h-1), and CQDs/ZnS (1.11 mmol g-1 h-1), respectively. Furthermore, it shows good stability, indicating that the modification of NCQDs prevents the photocorrosion and oxidation of ZnS. The enhanced performance is due to NCQD loading, which promotes the separation of photogenerated carriers, optimizes the structures, and increases the specific surface area. This work highlights the fact that NCQD-modified ZnS may afford a new strategy to synthesize ZnS-based photocatalysts with enhanced H2 production performance.
Collapse
Affiliation(s)
- Panpan Wu
- School of Optoelectronics and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
- Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices, Xiamen University of Technology, Xiamen 361024, China
| | - Haizhen Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Ziyu Xie
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
| | - Linjun Xie
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
| | - Guozhong Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yingchao Xu
- School of Optoelectronics and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China
- Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices, Xiamen University of Technology, Xiamen 361024, China
| | - Jing Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
| | - Can-Zhong Lu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China
- Xiamen Institute of Rare-earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
6
|
Bartkowski M, Zhou Y, Nabil Amin Mustafa M, Eustace AJ, Giordani S. CARBON DOTS: Bioimaging and Anticancer Drug Delivery. Chemistry 2024; 30:e202303982. [PMID: 38205882 DOI: 10.1002/chem.202303982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/10/2024] [Accepted: 01/10/2024] [Indexed: 01/12/2024]
Abstract
Cancer, responsible for approximately 10 million lives annually, urgently requires innovative treatments, as well as solutions to mitigate the limitations of traditional chemotherapy, such as long-term adverse side effects and multidrug resistance. This review focuses on Carbon Dots (CDs), an emergent class of nanoparticles (NPs) with remarkable physicochemical and biological properties, and their burgeoning applications in bioimaging and as nanocarriers in drug delivery systems for cancer treatment. The review initiates with an overview of NPs as nanocarriers, followed by an in-depth look into the biological barriers that could affect their distribution, from barriers to administration, to intracellular trafficking. It further explores CDs' synthesis, including both bottom-up and top-down approaches, and their notable biocompatibility, supported by a selection of in vitro, in vivo, and ex vivo studies. Special attention is given to CDs' role in bioimaging, highlighting their optical properties. The discussion extends to their emerging significance as drug carriers, particularly in the delivery of doxorubicin and other anticancer agents, underscoring recent advancements and challenges in this field. Finally, we showcase examples of other promising bioapplications of CDs, emergent owing to the NPs flexible design. As research on CDs evolves, we envisage key challenges, as well as the potential of CD-based systems in bioimaging and cancer therapy.
Collapse
Affiliation(s)
- Michał Bartkowski
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland
| | - Yingru Zhou
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland
- School of Biotechnology, Dublin City University, Glasnevin, Dublin, Ireland
| | | | | | - Silvia Giordani
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland
| |
Collapse
|
7
|
Pongchaikul P, Hajidariyor T, Khetlai N, Yu YS, Arjfuk P, Khemthong P, Wanmolee W, Posoknistakul P, Laosiripojana N, Wu KCW, Sakdaronnarong C. Nanostructured N/S doped carbon dots/mesoporous silica nanoparticles and PVA composite hydrogel fabrication for anti-microbial and anti-biofilm application. Int J Pharm X 2023; 6:100209. [PMID: 37711848 PMCID: PMC10498006 DOI: 10.1016/j.ijpx.2023.100209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/16/2023] Open
Abstract
Regarding the convergence of the worldwide epidemic, the appearance of bacterial infection has occasioned in a melodramatic upsurge in bacterial pathogens with confrontation against one or numerous antibiotics. The implementation of engineered nanostructured particles as a delivery vehicle for antimicrobial agent is one promising approach that could theoretically battle the setbacks mentioned. Among all nanoparticles, silica nanoparticles have been found to provide functional features that are advantageous for combatting bacterial contagion. Apart from that, carbon dots, a zero-dimension nanomaterial, have recently exhibited their photo-responsive property to generate reactive oxygen species facilitating to enhance microorganism suppression and inactivation ability. In this study, potentials of core/shell mesoporous silica nanostructures (MSN) in conjugation with carbon dots (CDs) toward antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli have been investigated. Nitrogen and sulfur doped CDs (NS/CDs) conjugated with MSN which were cost effective nanoparticles exhibited much superior antimicrobial activity for 4 times as much as silver nanoparticles against all bacteria tested. Among all nanoparticles tested, 0.40 M NS/CDs@MSN showed the greatest minimal biofilm inhibitory at very low concentration (< 0.125 mg mL-1), followed by 0.20 M NS/CDs@MSN (0.5 mg mL-1), CD@MSN (25 mg mL-1), and MSN (50 mg mL-1), respectively. Immobilization of NS/CDs@MSN in polyvinyl alcohol (PVA) hydrogel was performed and its effect on antimicrobial activity, biofilm controlling efficiency, and cytotoxicity toward fibroblast (NIH/3 T3 and L-929) cells was additionally studied for further biomedical applications. The results demonstrated that 0.40 M NS/CDs-MSN@PVA hydrogel exhibited the highest inhibitory effect on S. aureus > P. aeruginosa > E. coli. In addition, MTT assay revealed some degree of toxicity of 0.40 M NS/CDs-MSN@PVA hydrogel against L-929 cells by a slight reduction of cell viability from 100% to 81.6% when incubated in the extract from 0.40 M NS/CDs-MSN@PVA hydrogel, while no toxicity of the same hydrogel extract was detected toward NIH/3 T3 cells.
Collapse
Affiliation(s)
- Pisut Pongchaikul
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakarn 10540, Thailand
| | - Tasnim Hajidariyor
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Navarat Khetlai
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Yu-Sheng Yu
- Department of Chemical Engineering, National Taiwan University, No.1, Sec.4 Roosevelt Road, Taipei 10617, Taiwan
| | - Pariyapat Arjfuk
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakarn 10540, Thailand
| | - Pongtanawat Khemthong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Wanwitoo Wanmolee
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| | - Navadol Laosiripojana
- The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, 126 Pracha Uthit Road, Bang Mot, Thung Khru, Bangkok 10140, Thailand
| | - Kevin C.-W. Wu
- Department of Chemical Engineering, National Taiwan University, No.1, Sec.4 Roosevelt Road, Taipei 10617, Taiwan
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, Taoyuan, Taiwan
- International Graduate Program of Molecular Science and Technology, National Taiwan University (NTU-MST), Taipei 10617, Taiwan
- National Health Research Institute, Zhunan: 35, Keyan Road, Zhunan Town, Miaoli County 350, Taiwan
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand
| |
Collapse
|
8
|
Ahmed HB, Mikhail MM, Abdallah AEM, El-Shahat M, Emam HE. Pyrimidine-5-carbonitrile derivatives as sprout for CQDs proveniences: Antitumor and anti-inflammatory potentiality. Bioorg Chem 2023; 141:106902. [PMID: 37806048 DOI: 10.1016/j.bioorg.2023.106902] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 09/27/2023] [Accepted: 09/29/2023] [Indexed: 10/10/2023]
Abstract
A comparative study is proposed to show the effect of variation in the heteroatoms in the main skeleton of CQDs proveniences, on their affinity for nucleation of CQDs, as anti-inflammatory and anticancer drugs. Heterocyclic-based CQDs sprout was successfully exploited for preparation of three CQDs proveniences, named as; 2-(2,5-dimethoxyphenyl)-4,6-dioxo-6,11-dihydro-4H-pyrimido[2,1-b] quinazoline-3-carbonitrile (compound A), 2-(2,5-dimethoxyphenyl)-4,6-dioxo-4H,6H-benzo[e]pyrimido[2,1-b][1,3]oxazine-3-carbonitrile (compound S) and 2-(2,5-dimethoxyphenyl)-4,6-dioxo-4H,6H-benzo[e]pyrimido[2,1-b][1,3] thiazine-3-carbonitrile (compound T). Chemical formulas of CQDs proveniences & CQDs were verified via FTIR, 1HNMR, 13CNMR & XRD. Particle size of TM-CQDs, A-CQDs, S-CQDs & T-CQDs were estimated to be 3.7 ± 1.4, 4.6 ± 1.6, 5.9 ± 1.6 nm and 3.0 ± 1.3 nm, respectively. All of CQDs proveniences & CQDs were examined for their affinity as anti-inflammatory drugs via Griess assay. CQDs ingrained from TM (TM-CQDs) were detected with the highest NO inhibition% by increasing its concentration from 10 up to 100 μM to be 40 % to 89 %, respectively. Moreover, their anti-tumor performance against MCF-7: breast Adenocarcinoma cell line was approved via sulforhodamine B assay, whereas, IC50 was evaluated for TM-CQDs, A-CQDs, S-CQDs and T-CQDs to be 38.16, 36.09, 100 and 100 μg/ml, respectively.
Collapse
Affiliation(s)
- Hanan B Ahmed
- Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo 11795, Egypt.
| | - Mary M Mikhail
- Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo 11795, Egypt
| | - Amira E M Abdallah
- Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo 11795, Egypt
| | - Mahmoud El-Shahat
- Photochemistry Department, Chemical Industries Research Institute, National Research Centre, 33 EL Buhouth St., Dokki, Giza 12622, Egypt
| | - Hossam E Emam
- Department of Pretreatment and Finishing of Cellulosic Fibers, Textile Research and Technology Institute, National Research Centre, 33 EL Buhouth St., Dokki, Giza 12622, Egypt.
| |
Collapse
|
9
|
Cho S, Jung CW, Lee D, Byun Y, Kim H, Han H, Kim JH, Kwon W. Predictable incorporation of nitrogen into carbon dots: insights from pinacol rearrangement and iminium ion cyclization. NANOSCALE ADVANCES 2023; 5:5613-5626. [PMID: 37822896 PMCID: PMC10563847 DOI: 10.1039/d3na00550j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023]
Abstract
Nitrogen-doped carbon dots (CDs) have attracted considerable attention across various research areas and applications due to their enhanced optical properties and photostability. However, the mechanism of nitrogen incorporation in CDs remains elusive, hampering the precise control over nitrogen-incorporated structures and the investigation of the effects of nitrogen on the electronic structure and optical properties of CDs. In this study, we employed a rational design approach, utilizing glucosamine and ethylene glycol as the carbon source and co-reagent, respectively, to synthesize N-doped CDs. Our synthesis strategy involved pinacol rearrangement and iminium ion cyclization reactions, enabling the reliable formation of N-doped CDs. Notably, the resulting CDs exhibited distinctive emissive states attributed to heteroatomic defect structures, including oxygenic and nitrogenic polycyclic aromatic hydrocarbons. To gain further insights into their energy levels and electronic transitions, we conducted comprehensive investigations, employing extended Hückel calculations and pump-probe spectroscopy. The synthesized CDs displayed great promise as bioimaging and photodynamic therapy agents, highlighting their potential for biomedical applications. Moreover, our study significantly contributes valuable insights into the rational design of N-doped CDs with controllable chemical and electronic structures, thereby paving the way for advancements in their diverse range of applications.
Collapse
Affiliation(s)
- Soohyun Cho
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Chan-Woo Jung
- Department of Energy Science, Sungkyunkwan University Suwon 16419 South Korea
| | - Dajin Lee
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Yerim Byun
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
| | - Hyemin Kim
- Department of Cosmetics Engineering, Konkuk University Seoul 05029 South Korea
| | - Hyunho Han
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine Seoul 03722 South Korea
| | - Ji-Hee Kim
- Department of Physics, Pusan National University Busan 46241 South Korea
| | - Woosung Kwon
- Department of Chemical and Biological Engineering, Sookmyung Women's University Seoul 04310 South Korea
- Institute of Advanced Materials and Systems, Sookmyung Women's University Seoul 04310 South Korea
| |
Collapse
|
10
|
Can V, Onat B, Cirit ES, Sahin F, Canbek Ozdil ZC. Metal-Enhanced Fluorescent Carbon Quantum Dots via One-Pot Solid State Synthesis for Cell Imaging. ACS APPLIED BIO MATERIALS 2023; 6:1798-1805. [PMID: 37125840 DOI: 10.1021/acsabm.3c00040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In this study, a facile one-pot solid-state synthesis method is developed to shed light on the metal-enhanced fluorescence (MEF) effect in carbon quantum dots (CQDs) and gold nanoparticles (AuNPs) hybrid materials. This is one of the few studies on the solid-state synthesis of N-doped CQDs/gold hybrid nanomaterials. We have conducted various sets of experiments to reveal the role of individual reagents during the nucleation and growth of nanoparticles. We have demonstrated that the addition of a small amount of gold salt illustrates a paramount effect (103-fold) in photoluminescence intensity. This effect is ascribed to MEF, which is caused due to interactions between the excited-state fluorophores and the free surface electrons of metal nanoparticles. It is interesting to note that a further increase of gold yields fluorescence quenching due to a large number of formed AuNPs causing fluorescence resonance energy transfer. By adjusting the volume ratio of gold salt and CD precursors, it is possible to obtain the CQDs-AuNPs hybrid with the highest fluorescence, which produces extensive visible light under 460 nm excitation. Synthesized materials have been successfully used for imaging human dermal fibroblasts and A549 lung epithelial cells. The dose-dependent cytotoxicity studies reveal that the hybrid structures do not have cytotoxicity.
Collapse
Affiliation(s)
- Volkan Can
- Department of Genetics and Bioengineering, Yeditepe University, Istanbul 34755, Turkey
| | - Bugra Onat
- Department of Genetics and Bioengineering, Yeditepe University, Istanbul 34755, Turkey
| | - Elif Sümeyye Cirit
- Department of Materials Science and Nanotechnology Engineering, Yeditepe University, Istanbul 34755, Turkey
| | - Fikrettin Sahin
- Department of Genetics and Bioengineering, Yeditepe University, Istanbul 34755, Turkey
| | - Zeliha Cansu Canbek Ozdil
- Department of Materials Science and Nanotechnology Engineering, Yeditepe University, Istanbul 34755, Turkey
| |
Collapse
|
11
|
Song L, Qiao X, Sun J, Yi N, Wang M, Zhao Z, Xie R, Chen W, Xia Y. Wet-spinning fluorescent alginate fibres achieved by doping PEI modified CPDs for multiple anti-counterfeiting. Carbohydr Polym 2023; 304:120500. [PMID: 36641167 DOI: 10.1016/j.carbpol.2022.120500] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022]
Abstract
Carbonized polymer dots (CPDs) with satisfactory excitation-dependent-emission and biocompatibility had great potential in anti-counterfeiting fibres field. However, it was difficult for CPDs to combined into the fibres due to the unstable interaction between CPDs and spinnable polymer matrix. Polyethyleneimine (PEI) was used to modify CPDs (namely PEI-CPDs) for achieving stable interactions with sodium alginate (SA) by a simple method, which including the physical interaction between the amino groups of PEI-CPDs and carboxyl groups of SA and the chain entanglement between two types of polymer chains. Then alginate fibres based on PEI-CPDs (PEI-CPDs/CaALG fibres) were successfully prepared by wet-spinning for the first time with less loss of PEI-CPDs. The high mechanical strength, excellent thermal stability and good biocompatibility achieved by PEI-CPDs/CaALG fibres. Furthermore, the fibres exhibited the excitation-dependent-emission property. Anti-counterfeiting of the fibres was conducted on both textile and papers, which showed higher security than the existing anti-counterfeiting fibres.
Collapse
Affiliation(s)
- Li Song
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| | - Xiaolan Qiao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Jianxin Sun
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| | - Na Yi
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| | - Mengyue Wang
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| | - Zhihui Zhao
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China.
| | - Ruyi Xie
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| | - Weichao Chen
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China.
| | - Yanzhi Xia
- College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, Qingdao University, Qingdao 266071, China
| |
Collapse
|
12
|
Crista D, Algarra M, Martínez de Yuso MV, Esteves da Silva JCG, Pinto da Silva L. Investigation of the role of pH and the stoichiometry of the N-dopant in the luminescence, composition and synthesis yield of carbon dots. J Mater Chem B 2023; 11:1131-1143. [PMID: 36637160 DOI: 10.1039/d2tb02318k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Carbon dots (CDs) are carbon-based nanoparticles with very attractive luminescence features, which simplicity and flexibility of their fabrication can lead to an endless number of CDs with distinct properties and applications. High fluorescence quantum yields (QYFL) are generally a necessary feature for various applications of CDs. One commonly employed strategy to improve the fluorescence properties of CDs is heteroatom-doping using precursors containing desired heteroatoms (with focus on N-doping). In this work, we report the synthesis and systematic investigation of an array of N-doped CDs, obtained from the dry heating of solid mixtures of glucose and urea in different molar ratios with two main objectives: to study the role of stoichiometry in the optical properties and composition of CDs and to investigate the formation of possible alkaline-responsive nanoparticles and the potential of this procedure for obtaining CDs with higher synthesis yields. We have characterized the optical properties of this diverse array of glucose and urea-based CDs using both UV-Vis and fluorescence spectroscopies. In addition, we have also examined the CDs by using high-resolution transmission electron microscopy (HR-TEM) and X-Ray photoelectron (XPS) spectroscopy, as well as by assessing the thermal stability of the nanoparticles. We have found that this fabrication process generates two types of CDs, one readily soluble in water and other only soluble at basic pH. The latter was characterized by higher synthesis yields, and lower QYFL and thermal stability, when compared with those of the former. Furthermore, the stoichiometry of the N-dopant does not appear to be correlated with the QYFL of the obtained CDs. This study provides novel information that should be useful for the future rational development of CDs with higher QYFL and synthesis yields.
Collapse
Affiliation(s)
- Diana Crista
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences, University of Porto, R. Campo Alegre s/n, 4169-007 Porto, Portugal.
| | - Manuel Algarra
- INAMAT2-Institute for Advanced Materials and Mathematics, Department of Science, Public University of Navarra, Campus of Arrosadía, 31006 Pamplona, Spain.
| | - Maria Valle Martínez de Yuso
- X-ray Photoelectron Spectroscopy Lab. Central Service to Support Research Building (SCAI), University of Málaga, 29071 Málaga, Spain
| | - Joaquim C G Esteves da Silva
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences, University of Porto, R. Campo Alegre s/n, 4169-007 Porto, Portugal. .,LACOMEPHI, GreenUPorto, Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences, University of Porto, R. Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Luís Pinto da Silva
- Chemistry Research Unit (CIQUP), Institute of Molecular Sciences (IMS), Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences, University of Porto, R. Campo Alegre s/n, 4169-007 Porto, Portugal. .,LACOMEPHI, GreenUPorto, Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences, University of Porto, R. Campo Alegre s/n, 4169-007 Porto, Portugal
| |
Collapse
|
13
|
Liu Y, Zhong D, Yu L, Shi Y, Xu Y. Primary Amine Functionalized Carbon Dots for Dead and Alive Bacterial Imaging. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:437. [PMID: 36770398 PMCID: PMC9920602 DOI: 10.3390/nano13030437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Small molecular dyes are commonly used for bacterial imaging, but they still meet a bottleneck of biological toxicity and fluorescence photobleaching. Carbon dots have shown high potential for bio-imaging due to their low cost and negligible toxicity and anti-photobleaching. However, there is still large space to enhance the quantum yield of the carbon quantum dots and to clarify their mechanisms of bacterial imaging. Using carbon dots for dyeing alive bacteria is difficult because of the thick density and complicated structure of bacterial cell walls. In this work, both dead or alive bacterial cell imaging can be achieved using the primary amine functionalized carbon dots based on their small size, excellent quantum yield and primary amine functional groups. Four types of carbon quantum dots were prepared and estimated for the bacterial imaging. It was found that the spermine as one of precursors can obviously enhance the quantum yield of carbon dots, which showed a high quantum yield of 66.46% and high fluorescence bleaching-resistance (70% can be maintained upon 3-h-irradiation). Furthermore, a mild modifying method was employed to bound ethylenediamine on the surface of the spermine-carbon dots, which is favorable for staining not only the dead bacterial cells but also the alive ones. Investigations of physical structure and chemical groups indicated the existence of primary amine groups on the surface of spermine-carbon quantum dots (which own a much higher quantum yield) which can stain alive bacterial cells visibly. The imaging mechanism was studied in detail, which provides a preliminary reference for exploring efficient and environment-friendly carbon dots for bacterial imaging.
Collapse
Affiliation(s)
- Yuting Liu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Di Zhong
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, No. 308 Ningxia Road, Qingdao 266000, China
| | - Lei Yu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Yanfeng Shi
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Yuanhong Xu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| |
Collapse
|
14
|
Mao J, Xue M, Guan X, Wang Q, Wang Z, Qin G, He H. Near-Infrared Blinking Carbon Dots Designed for Quantitative Nanoscopy. NANO LETTERS 2023; 23:124-131. [PMID: 36579734 DOI: 10.1021/acs.nanolett.2c03711] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Blinking carbon dots (CDs) have attracted attention as a probe for single molecule localization microscopy (SMLM), yet quantitative analysis is limited because of inept blinking and low signal-to-noise ratio (SNR). Here we report the design and synthesis of near-infrared (NIR) blinking CDs with a maximum emission of around 750 nm by weaving a nitrogen-doped aromatic backbone with surplus carboxyl groups on the surface. The NIR-CDs allow conjugation to monovalent antibody fragments for labeling and imaging of cellular receptors as well as afford increases of 52% in SNR and 33% in localization precision over visible CDs. Analysis of fluorescent bursts allows for accurate counting of cellular receptors at the nanoscale resolution. Using NIR-CDs-based SMLM, we demonstrate oligomerization and internalization of programmed cell death-ligand 1 by a small molecule inhibitor for checkpoint blockade. Our NIR-CDs can become a generally applicable probe for quantitative nanoscopy in chemistry and biology.
Collapse
Affiliation(s)
- Jian Mao
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Minmin Xue
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Xin Guan
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Qian Wang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China
| | - Zhirui Wang
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Guangyong Qin
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| | - Hua He
- State Key Laboratory of Heavy Oil Processing and College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
| |
Collapse
|
15
|
Chen J, Xia X, Li P, Yu H, Xie Y, Guo Y, Yao W, Qian H, Cheng Y. A facile “off-on” fluorescence sensor for pentachlorophenol detection based on natural N and S co-doped carbon dots from crawfish shells. Food Chem 2022; 405:134802. [DOI: 10.1016/j.foodchem.2022.134802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/17/2022] [Accepted: 10/27/2022] [Indexed: 11/05/2022]
|
16
|
Liu S, Shi Y, Li X, Wang Z. Humic Acids Affect the Detection of Metal Ions by Cyanobacteria Carbon Quantum Dots Differently. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:10225. [PMID: 36011858 PMCID: PMC9408800 DOI: 10.3390/ijerph191610225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
A "top-down" synthesis of carbon quantum dots (CQDs), novel fluorescent C materials from waste biomass, is both cost-effective and environmentally friendly. N-rich cyanobacteria are promising precursors to produce CQDs with high fluorescence (FL) intensity for the detection of metal ions. Herein, we synthesized cyanobacteria-based CQDs using a hydrothermal process and evidenced their high FL intensity and stability. The cyanobacteria-based CQDs showed powerful sensitivity for the specific detection of Fe3+ and Cr6+, which could be ascribed to (i) static FL quenching as a result of the interaction between -OH, -NH2, and -COOH groups with the metal ions, (ii) internal filtering effects between the CQDs and Fe3+ or Cr6+, and (iii) fluorescence resonance energy transfer between CQDs and Cr6+. Humic acids (HAs) coexisting led to an underestimation of Fe3+ but an overestimation of Cr6+ by the CQDs due to the different FL quenching mechanisms of the CQDs. HAs sorbed Fe3+ and wrapped the CQDs to form a barrier between them, inhibiting FL quenching of CQDs by Fe3+. As for Cr6+, HAs reduced Cr6+ and also led to FL quenching; the sorbed HAs on the CQDs acted as a carrier of electrons between Cr6+ and the CQDs, enhancing FL quenching of the CQDs. This study is the first work to evidence the interference of HAs in the detection of metal ions by CQDs derived from cyanobacteria, which would enlighten the application of CQDs in a natural aqueous environment.
Collapse
Affiliation(s)
- Simin Liu
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yishen Shi
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaona Li
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
- Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
- Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China
| |
Collapse
|
17
|
Qi K, Ye Y, Wei B, Li M, Lun Y, Xie X, Xie H. N-CQDs from reed straw enriching charge over BiO 2-x/BiOCl p-n heterojunction for improved visible-light-driven photodegradation of organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128759. [PMID: 35349850 DOI: 10.1016/j.jhazmat.2022.128759] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/06/2022] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Green bismuth-based photocatalysts have attracted extensive attention in the field of PPCPs photodegradation. The improved carrier separation efficiency still remains a key factor to enhance photocatalytic performance. Herein, N-doped biomass carbon quantum dots (N-CQDs) decorated p-n heterojunction photocatalyst BiO2-x/BiOCl was prepared using a facile ion-etching strategy, and it displayed a markedly enhanced catalytic activity in the photodegradation of sulfonamide antibiotics. Calculated by the differential charge density, the doped N-CQDs could gather photogenerated electrons, which indicated that the introduction of N-CQDs into BiO2-x/BiOCl would effectively inhibit the recombination of photogenerated charge carriers. In addition, photocatalytic performance and density functional theory (DFT) calculation results revealed that the photogenerated electrons tended to transfer from p-BiOCl to n-BiO2-x through N-CQDs, which could generate ·O2- and photogenerated h+ to oxidize the target pollutants. Benefiting from the synergistic effect of accelerated separation of e--h+ in p-n heterojunction and the electron-rich performance of N-CQDs, the superb TOC removal efficiencies (89.40% within 120 min visible-light irradiation) and toxicity reduction performance of photodegradation intermediates were achieved. As a consequence, this work will provide a design of high-quality photocatalysts and a green-promising strategy for bismuth-based photocatalysts in the water treatment of PPCPs.
Collapse
Affiliation(s)
- Kemin Qi
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Yuping Ye
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Bin Wei
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Mengxin Li
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Yanxin Lun
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China
| | - Xiaoyun Xie
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, China.
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou, Zhejiang Province, China
| |
Collapse
|
18
|
Saengsrichan A, Saikate C, Silasana P, Khemthong P, Wanmolee W, Phanthasri J, Youngjan S, Posoknistakul P, Ratchahat S, Laosiripojana N, Wu KCW, Sakdaronnarong C. The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe3+ Ion. Int J Mol Sci 2022; 23:ijms23095001. [PMID: 35563393 PMCID: PMC9100793 DOI: 10.3390/ijms23095001] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 02/04/2023] Open
Abstract
This work aims to enhance the value of palm empty fruit bunches (EFBs), an abundant residue from the palm oil industry, as a precursor for the synthesis of luminescent carbon dots (CDs). The mechanism of fIuorimetric sensing using carbon dots for either enhancing or quenching photoluminescence properties when binding with analytes is useful for the detection of ultra-low amounts of analytes. This study revealed that EFB-derived CDs via hydrothermal synthesis exceptionally exhibited luminescence properties. In addition, surface modification for specific binding to a target molecule substantially augmented their PL characteristics. Among the different nitrogen and sulfur (N and S) doping agents used, including urea (U), sulfate (S), p-phenylenediamine (P), and sodium thiosulfate (TS), the results showed that PTS-CDs from the co-doping of p-phenylenediamine and sodium thiosulfate exhibited the highest PL properties. From this study on the fluorimetric sensing of several metal ions, PTS-CDs could effectively detect Fe3+ with the highest selectivity by fluorescence quenching to 79.1% at a limit of detection (LOD) of 0.1 µmol L−1. The PL quenching of PTS-CDs was linearly correlated with the wide range of Fe3+ concentration, ranging from 5 to 400 µmol L−1 (R2 = 0.9933).
Collapse
Affiliation(s)
- Aphinan Saengsrichan
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
| | - Chaiwat Saikate
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
| | - Peeranut Silasana
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
| | - Pongtanawat Khemthong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand; (P.K.); (W.W.); (J.P.); (S.Y.)
| | - Wanwitoo Wanmolee
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand; (P.K.); (W.W.); (J.P.); (S.Y.)
| | - Jakkapop Phanthasri
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand; (P.K.); (W.W.); (J.P.); (S.Y.)
| | - Saran Youngjan
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand; (P.K.); (W.W.); (J.P.); (S.Y.)
| | - Pattaraporn Posoknistakul
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
| | - Sakhon Ratchahat
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
| | - Navadol Laosiripojana
- The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, 126 Pracha Uthit Road, Bang Mot, Thung Khru, Bangkok 10140, Thailand;
| | - Kevin C.-W. Wu
- Department of Chemical Engineering, National Taiwan University, No.1, Sec.4 Roosevelt Road, Taipei 10617, Taiwan;
- Center of Atomic Initiative for New Materials (AI-MAT), National Taiwan University, Taipei 10617, Taiwan
- International Graduate Program of Molecular Science and Technology, National Taiwan University (NTU-MST), Taipei 10617, Taiwan
| | - Chularat Sakdaronnarong
- Department of Chemical Engineering, Faculty of Engineering, Mahidol University, 25/25 Putthamonthon 4 Road, Salaya, Putthamonthon, Nakhon Pathom 73170, Thailand; (A.S.); (C.S.); (P.S.); (P.P.); (S.R.)
- Correspondence: ; Tel.: +66-28892138 (ext. 6101-2); Fax: +662-4419731
| |
Collapse
|
19
|
Highly efficient As(III) removal through simultaneous oxidation and adsorption by N-CQDs modified MIL-53(Fe). Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120409] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
20
|
Fluorescent Mechanism in Zero-Dimensional Carbon Nanomaterials: A Review. J Fluoresc 2022; 32:887-906. [PMID: 35303239 DOI: 10.1007/s10895-022-02915-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 02/25/2022] [Indexed: 10/18/2022]
Abstract
Fluorescent carbon dots (CDs) have acquired growing interest from different areas over decades. Their fascinating property of tunable fluorescence by changing the excitation wavelength has attracted researchers worldwide. Understanding the mechanisms behind fluorescence is of great importance, as they help with the synthesis and applications, significantly when narrowed down to applications with color-tunable mechanisms. But, due to a lack of practical and theoretical information, the fluorescence mechanisms of CDs remain unknown, preventing the production of CDs with desired optical qualities. This review focuses on the PL mechanisms of carbon dots. The quantum confinement effect determined the carbon core, the surface and edge states determined by various surface defects and the connected functional/chemical groups on the surface/edges, the molecular state solely determined the fluorophores in the interior or surface of the CDs, and the Crosslink Enhanced Emission Effect are the currently confirmed PL mechanisms.
Collapse
|
21
|
Naik VM, Bhosale SV, Kolekar GB. A brief review on the synthesis, characterisation and analytical applications of nitrogen doped carbon dots. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:877-891. [PMID: 35174374 DOI: 10.1039/d1ay02105b] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Since their discovery in 2004, fluorescent carbon nanoparticles have been tremendously studied due to their tunable optical properties. Recent studies on the synthesis and application of doped carbon dots highlight the effortless doping strategy with high quantum yields and applications in diverse fields. Among these, nitrogen doped carbon dots (NCDs) have been extensively investigated for their potential analytical and biological applications. This review features the synthetic methods and important characterisation studies required to verify successful synthesis of nitrogen doped carbon dots. Analytical applications of NCDs in metal ion, biomolecule, temperature, pH and gas sensing along with cell imaging and drug delivery applications are also discussed.
Collapse
Affiliation(s)
- Vaibhav M Naik
- P. E. S's. Ravi S. Naik College of Arts and Science, Farmagudi, Ponda, Goa, India
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur-416004, Maharashtra, India.
| | - Sheshanath V Bhosale
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403206, India.
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur-416004, Maharashtra, India.
| |
Collapse
|
22
|
Horo H, Saha M, Das H, Mandal B, Kundu LM. Synthesis of highly fluorescent, amine-functionalized carbon dots from biotin-modified chitosan and silk-fibroin blend for target-specific delivery of antitumor agents. Carbohydr Polym 2022; 277:118862. [PMID: 34893267 DOI: 10.1016/j.carbpol.2021.118862] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/21/2021] [Accepted: 11/03/2021] [Indexed: 12/17/2022]
Abstract
Carbon dots (CDs) have been a promising theranostic tool with high biocompatibility and a tailorable fluorescence profile. Herein, we report the synthesis of highly fluorescent amine-functionalized CDs from low molecular weight chitosan (LMWC) and silk-fibroin (SF) blends. The synthesized CDs were quasi-spherical in shape with a size of 3 ± 1.5 nm. A significant increase in fluorescent intensity and quantum yield was achieved upon increasing the SF content due to nitrogen doping. For inducing target specificity to cancer cells, biotin was covalently conjugated to the CDs, and the conjugation was determined by FTIR spectroscopy. The conjugate was further loaded with 5-fluorouracil (5-FU) as a model anti-cancer drug. The MTT assay showed increased cytotoxicity of the conjugated CDs in cancer cells compared to normal cells. The live-cell imaging in MCF-7 cell lines showed bright blue-colored fluorescence and increased internalization of the conjugated CDs than the non-conjugate ones due to receptor-mediated endocytosis.
Collapse
Affiliation(s)
- Himali Horo
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Muktashree Saha
- Department of Bioscience & Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Himadree Das
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Bishnupada Mandal
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Lal Mohan Kundu
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India; Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
| |
Collapse
|
23
|
Nugroho D, Keawprom C, Chanthai S, Oh WC, Benchawattananon R. Highly Sensitive Fingerprint Detection under UV Light on Non-Porous Surface Using Starch-Powder Based Luminol-Doped Carbon Dots (N-CDs) from Tender Coconut Water as a Green Carbon Source. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:400. [PMID: 35159745 PMCID: PMC8839162 DOI: 10.3390/nano12030400] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 01/20/2022] [Accepted: 01/23/2022] [Indexed: 12/29/2022]
Abstract
This study aims to synthesize carbon dots from a natural resource and will be used to detect a latent fingerprint on a non-porous surface. The carbon dots (CDs) were prepared by adding luminol to coconut water and ethanol via a hydrothermal method. Luminol enhances the chemiluminescence of the CDs, which show more distinct blue light under a UV lamp compared with bare CDs. To detect the latent fingerprint, luminol carbon dots (N-CDs) were combined with commercial starch and stirred at room temperature for 24 h. Their characteristics and optical properties were measured using EDX-SEM, HR-TEM, FTIR, XPS, UV-visible absorption, and fluorescence. In this research, it was found that the N-CDs had a d-spacing of 0.5 nm and a size of 12.9 nm. The N-CDs had a fluorescence intensity 551% higher than the standard normally used. N-CDs can be used to detect latent fingerprints on a non-porous surface and are easy to detect under a UV lamp at 395 nm. Therefore, luminol has a high potential to increase sensitive and stable traces of chemiluminescence from the green CDs for forensic latent fingerprint detection.
Collapse
Affiliation(s)
- David Nugroho
- Forensics Division, Department of Integrated Science, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Chayanee Keawprom
- Materials Chemistry Research Center, Department Chemistry and Center of Excellence for Innovation Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Saksit Chanthai
- Materials Chemistry Research Center, Department Chemistry and Center of Excellence for Innovation Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Won-Chun Oh
- Department of Advanced Materials Science and Engineering, Hanseo University, Seosan-si 356-706, Korea;
| | - Rachadaporn Benchawattananon
- Forensics Division, Department of Integrated Science, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;
| |
Collapse
|
24
|
Gu L, Zhang J, Yang G, Tang Y, Zhang X, Huang X, Zhai W, Fodjo EK, Kong C. Green preparation of carbon quantum dots with wolfberry as on-off-on nanosensors for the detection of Fe 3+ and l-ascorbic acid. Food Chem 2021; 376:131898. [PMID: 34968914 DOI: 10.1016/j.foodchem.2021.131898] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 12/08/2021] [Accepted: 12/16/2021] [Indexed: 12/28/2022]
Abstract
A green and facile hydrothermal synthesis approach is proposed for the preparation of nitrogen-doped carbon quantum dots (N-CQDs) with wolfberry. These N-CQDs were developed as a highly sensitive fluorescent 'on-off-on' switch sensor for the sensing of Fe3+ and l-ascorbic acid (AA). The N-CQDs displayed superior fluorescence characteristics of CQDs with a quantum yield up to 22%. The N-CQDs were demonstrated to selectively react with Fe3+, leading to fluorescence quenching effect, which was successfully used for the detection of Fe3+ with a limit of detection at 3 μmoL•L-1. The addition of AA is supposed to repair the surface defects, and result in the fluorescence recovery. Based on this effect, the strategy of 'on-off-on' detection of AA was established with a limit of detection at 1.8 μmoL•L-1. Furthermore, the practical application of the detection of Fe3+ lake water and AA in medical tablet was demonstrated, promising an effective and efficient 'on-off-on' nanosensor with low-cost, green synthesis for Fe3+ and AA detection.
Collapse
Affiliation(s)
- Lin Gu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200090, PR China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China
| | - Jingru Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200090, PR China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China
| | - Guangxin Yang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China.
| | - Yunyu Tang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China
| | - Xuan Zhang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China
| | - Xuanyun Huang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China
| | - Wenlei Zhai
- Beijing Research Center for Agricultural Standards and Testing, No. 9 Middle Road of Shuguanghuayuan, Haidian District, Beijing 100097, PR China
| | - Essy Kouadio Fodjo
- Physical Chemistry Laboratory, UFR SSMT, Université Felix Houphouet Boigny, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Cong Kong
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, PR China.
| |
Collapse
|
25
|
Targeted design of green carbon dot-CA-125 aptamer conjugate for the fluorescence imaging of ovarian cancer cell. Cell Biochem Biophys 2021; 80:75-88. [PMID: 34716880 DOI: 10.1007/s12013-021-01034-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 09/15/2021] [Indexed: 12/12/2022]
Abstract
Aptamer-Carbon Dot (CD) bioconjugation is an attractive target-tracking strategy in detecting cell surface antigens. This study describes an effective imaging paradigm for CA-125 antigen imaging. Our experience encompasses green CD synthesis and characterization, CD-capture probe conjugation through covalent bonding, the hybridization linkage of CD-probe to aptamer and their coupling confirmation, and fluorescent targeted imaging of ovarian cancer cells. As a result, the synthesized CDs from lemon extract by hydrothermal reaction show average size of 2 nm with maximum fluorescence intensity at excitation/emission 360/450 nm. CD-probe construction was provided by functional group interactions of CD and probe via EDC/NHS chemistry. The linkage of CD-probe to aptamer was conducted by Watson-Crick nucleotide pairing. The assessment of CD-probe and CD-probe-aptamer fabrication was validated by the increase in surface roughness through AFM analysis, the diminish of fluorescence intensity of CD after bioconjugation, and particle size growth of the construct. Conjugates with negligible cytotoxicity, appropriate zeta potential, and good aptamer release were applied in cellular imaging. This targeted diagnosis method was employed the four reported DNA aptamers toward fluorescence intensity. The DOV-3 aptamer showed more qualified detection over other aptamer conjugates during fluorescent microscopy analysis. In conclusion, the CD-probe-aptamer conjugate applications as toxic-free method can open new horizons in fluorescent nano-imaging in the field of targeted cancer cell diagnosis.
Collapse
|
26
|
Kamali SR, Chen CN, Agrawal DC, Wei TH. Sulfur-doped carbon dots synthesis under microwave irradiation as turn-off fluorescent sensor for Cr(III). J Anal Sci Technol 2021. [DOI: 10.1186/s40543-021-00298-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
AbstractThis study synthesized a facile and high sensitive fluorescent probe based on sulfur-doped carbon dots (S-CDs) using a one-step microwave irradiation method. The probe exhibited a strong blue emission and a high quantum yield (QY) of 36.40%. In the detection, the presence of trivalent chromium (Cr(III)) strongly quenched the PL intensity of S-CDs by the inner filter effect (IFE) quenching mechanism of Cr(III) on the S-CDs. The S-CDs exhibited good sensitivity to turn-off Cr(III) detection with a linear range concentration of 0–45 μM and a detection limit of 0.17 μM. Furthermore, the proposed method has been successfully applied for Cr(III) detection in natural water samples with the 93.68–106.20% recoveries.
Collapse
|
27
|
Su YH, Huang HH, Tseng CC, Tsai HJ, Hsu WK. Production of nitrogen-doped carbon quantum dots with controllable emission wavelength, excellent sensing of Fe 3+ in aqueous solution, and potential application for stealth quick response coding in the visible regime. RSC Adv 2021; 11:34117-34124. [PMID: 35497274 PMCID: PMC9042367 DOI: 10.1039/d1ra05106g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 09/27/2021] [Indexed: 01/10/2023] Open
Abstract
Nitrogen-doped carbon quantum dots (N-CQDs) exhibit a high quantum yield with controllable emission wavelength and intensity in the blue-green regime. N-CQDs were tested and determined to be thermally and optically stable during 150 °C heat treatment and prolonged UV irradiation. Potential applications of N-CQDs were demonstrated, including excellent Fe3+ sensing in aqueous solution, fluorescent polymer fibres, and stealth quick response coding at visible wavelengths.
Collapse
Affiliation(s)
- Yu-Hsun Su
- Department of Materials Science and Engineering, High Entropy Materials Centre, National Tsing-Hua University Hsinchu 300044 Taiwan
| | - Hsuan-Hao Huang
- Department of Materials Science and Engineering, High Entropy Materials Centre, National Tsing-Hua University Hsinchu 300044 Taiwan
| | - Chao-Chi Tseng
- Department of Materials Science and Engineering, High Entropy Materials Centre, National Tsing-Hua University Hsinchu 300044 Taiwan
| | - Hsin-Jung Tsai
- Department of Materials Science and Engineering, High Entropy Materials Centre, National Tsing-Hua University Hsinchu 300044 Taiwan
| | - Wen-Kuang Hsu
- Department of Materials Science and Engineering, High Entropy Materials Centre, National Tsing-Hua University Hsinchu 300044 Taiwan
| |
Collapse
|
28
|
Yu J, Yong X, Tang Z, Yang B, Lu S. Theoretical Understanding of Structure-Property Relationships in Luminescence of Carbon Dots. J Phys Chem Lett 2021; 12:7671-7687. [PMID: 34351771 DOI: 10.1021/acs.jpclett.1c01856] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Carbon dots (CDs) have excellent luminescence characteristics, such as good light stability, high quantum yield (QY), long phosphorescence lifetime, and a wide emission wavelength range, resulting in CDs' great success in optical applications. Understanding the structure-property relationships in CDs is essential for their use in optoelectronic applications. However, because of the complex nature of CD structures and synthesis processes, understanding the luminescence mechanism and structure-property relationships of CDs is a big challenge. This Perspective reviews the theoretical efforts toward the understanding of structure-property relationships and discusses the challenges that need to be overcome in future development of CDs.
Collapse
Affiliation(s)
- Jingkun Yu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xue Yong
- Department of Chemistry, University of Calgary, Alberta T2N 1N4, Canada
| | - Zhiyong Tang
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Siyu Lu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| |
Collapse
|
29
|
Ramoğlu B, Gümrükçüoğlu A, Çekirge E, Ocak M, Ocak Ü. One Spot Microwave Synthesis and Characterization of Nitrogen-Doped Carbon Dots with High Oxygen Content for Fluorometric Determination of Banned Sudan II Dye in Spice Samples. J Fluoresc 2021; 31:1587-1598. [PMID: 34342798 DOI: 10.1007/s10895-021-02795-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
A simple microwave-assisted synthesis of nitrogen-doped carbon dots with high oxygen content (O-N-CDs) was carried out with citric acid as a carbon source and 2,4-diamino-6-methyl-1,3,5-triazine as a nitrogen source in triethylene glycol (TEG) media. It was determined by SEM analysis that O-N-CDs consisted of particles of different sizes and shapes. Transmission electron microscopy (TEM), Raman spectroscopy, and X-ray diffraction (XRD) analysis confirmed that O-N-CDs have a graphitic structure. Moreover, they showed a high fluorescence property based on the excitation wavelength. Therefore, a new fluorometric method was developed for the determination of banned food dye Sudan II by using the O-N-CDs. The proposed method was used in the determination of Sudan II in spiked spice samples. The detection limit was 0.6 mg L-1 and the linear range was 0-8 mg L-1.
Collapse
Affiliation(s)
- Bahtışen Ramoğlu
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Abidin Gümrükçüoğlu
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Ender Çekirge
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Miraç Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Ümmühan Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey.
| |
Collapse
|
30
|
Rossini EL, Milani MI, Lima LS, Pezza HR. Paper microfluidic device using carbon dots to detect glucose and lactate in saliva samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 248:119285. [PMID: 33310613 DOI: 10.1016/j.saa.2020.119285] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/23/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Bioanalyses are commonly performed with blood or serum samples. However, these analyses often require invasive and painful blood collection using a needle or finger pricking. Saliva is an alternative and very attractive biological medium for performing clinical analyses, since it contains many types of clinically relevant biomarkers and compounds. Its collection is straightforward and can be achieved in a non-invasive and stress-free way. However, the analytes are frequently present at low concentrations, while the viscosity of whole saliva hinders its analysis using paper devices, especially those with multiple layers (3D-μPADs). This work explores the use of a simple, fast, and low-cost saliva sample pretreatment using a cotton-paper-syringe filtration system, allowing the analysis of saliva samples using multilayer paper devices. The proposed methodology employs the oxidation of glucose and lactate, catalyzed by specific oxidase enzymes, producing hydrogen peroxide. The detection is based on the fluorescence quenching of carbon dots in the presence of hydrogen peroxidase. The concentrations of the analytes showed good linear correlations with the fluorescence quenching, with LODs of 2.60 × 10-6 and 8.14 × 10-7 mol L-1 for glucose and lactate, respectively. The proposed method presented satisfactory intra-day and inter-day repeatabilities, with %RSD values in the range 3.82-6.61%. The enzymatic systems proved to be specific for the analytes and the matrix had no significant influence on the glucose and lactate determinations. The proposed methodology was successfully applied to saliva and serum samples and was validated using certified material.
Collapse
Affiliation(s)
- Eduardo Luiz Rossini
- Instituto de Química, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Prof. Francisco Degni 55, C.P. 355, 14800-900 Araraquara, SP, Brazil.
| | - Maria Izabel Milani
- Instituto de Química, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Prof. Francisco Degni 55, C.P. 355, 14800-900 Araraquara, SP, Brazil
| | - Liliane Spazzapam Lima
- Instituto de Química, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Prof. Francisco Degni 55, C.P. 355, 14800-900 Araraquara, SP, Brazil
| | - Helena Redigolo Pezza
- Instituto de Química, Universidade Estadual Paulista "Júlio de Mesquita Filho" - UNESP, Rua Prof. Francisco Degni 55, C.P. 355, 14800-900 Araraquara, SP, Brazil
| |
Collapse
|
31
|
Teymoorian T, Hashemi N, Mousazadeh MH, Entezarian Z. N, S doped carbon quantum dots inside mesoporous silica for effective adsorption of methylene blue dye. SN APPLIED SCIENCES 2021. [DOI: 10.1007/s42452-021-04287-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
AbstractThis study aimed to develop non-metal elements for doping carbon quantum dots (CQDs) with nitrogen and sulfur (N, S-CQDs), which loaded inside hexagonal mesoporous silica (HMS) in order to effectively remove methylene blue dye (MB) from an aqueous solution. The histidine and cysteine amino acids were used as the source for synthesis N, S-CQDs through the hydrothermal method. Morphology and structure of the N, S-CQDs, and adsorbent (N, S-CQDs/HMS) were characterized by using different microscopic and spectroscopic techniques. The adsorption parameters such as adsorbent dosage (0.25–1 g/L), pH (2–10), contact time (15–75 min), and initial MB dye concentration (20–300 mg/L) were investigated. The maximum adsorption capacity and removal efficiency of MB were determined at 370.4 mg/g and 97%, respectively, under optimum conditions at 303 K. The adsorption isotherm studies were fitted with the Freundlich isotherm equation, and the dye removal kinetics of the adsorbent followed the pseudo-second-order model. Thermodynamic studies showed that the adsorption process had exothermic and spontaneous behavior. The removal of MB next to the Rhodamine B and Reactive Black 5 dyes indicated that the N, S-CQDs/HMS had excellent selective behavior for MB absorption. This prepared adsorbent could be well recycled with suitable activity after four repeated adsorption–desorption cycles. Results revealed that the porous characters, surface area, charge properties, reduction in the bandgap, and quantum yield of the N, S-CQDs/HMS were essential factors that affected dye adsorption.
Collapse
|
32
|
Zhu Y, Yan L, Xu M, Li Y, Song X, Yin L. Difference between ammonia and urea on nitrogen doping of graphene quantum dots. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125703] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
33
|
Single-step synthesis of N-doped carbon dots and applied for dopamine sensing, in vitro multicolor cellular imaging as well as fluorescent ink. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.113019] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Tiwari P, Kaur N, Sharma V, Mobin SM. A spectroscopic investigation of Carbon dots and its reduced state towards fluorescence performance. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112847] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
35
|
Park Y, Kim Y, Chang H, Won S, Kim H, Kwon W. Biocompatible nitrogen-doped carbon dots: synthesis, characterization, and application. J Mater Chem B 2020; 8:8935-8951. [PMID: 32901641 DOI: 10.1039/d0tb01334j] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carbon dots (CDs) are promising materials for biomedical applications owing to their unique properties, biocompatibility, and biodegradability. The current studies on CDs are focused on improving their functionality by modulating their electronic structure, which helps in controlling their chemical, optical, and electrical properties. Doping with heteroatoms is a typical approach for modulating the electronic structure of CDs. In particular, there has been considerable progress in nitrogen-doped CDs for improving their potential for various biomedical applications, including optical imaging, drug delivery, and light-mediated imaging/therapeutic applications such as photoacoustic imaging, photothermal therapy, and photodynamic therapy. In this review, the important features of nitrogen-doped CDs are discussed along with the recent studies on these materials and their prospects.
Collapse
Affiliation(s)
- Yoonsang Park
- Department of Chemical Engineering, Pohang University of Science & Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang 37673, Korea and Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea.
| | - Yujin Kim
- Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea.
| | - Heemin Chang
- Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea.
| | - Sungyeon Won
- Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea.
| | - Hyemin Kim
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK
| | - Woosung Kwon
- Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea.
| |
Collapse
|
36
|
Du F, Cheng Z, Kremer M, Liu Y, Wang X, Shuang S, Dong C. A label-free multifunctional nanosensor based on N-doped carbon nanodots for vitamin B 12 and Co 2+ detection, and bioimaging in living cells and zebrafish. J Mater Chem B 2020; 8:5089-5095. [PMID: 32406457 DOI: 10.1039/d0tb00443j] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Multifunctional N-doped carbon nanodots (N-CNDs) with a fluorescence (FL) quantum yield (QY) of 13.6% have been synthesized via a facile one-step hydrothermal process using Artemisia annua and 1,2-ethylenediamine as precursors. As-prepared N-CNDs showed excellent FL properties and were developed as a multifunctional sensing platform for vitamin B12 (VB12) and Co2+ determination, and bioimaging in living cells and zebrafish. The FL of N-CNDs is quenched efficiently in the presence of VB12 on the basis of the inner filter effect (IFE) or Co2+ by static quenching, respectively. EDTA as a masking agent enables Co2+ to be effectively eliminated and N-CNDs were used to selectively detect VB12 in the presence of both VB12 and Co2+. The present FL nanosensor can detect VB12 and Co2+ in the linear ranges of 0.5-35 μM and 2.5-25 μM with the corresponding detection limits of 47.4 nM and 230.5 nM, respectively. The study proved that the determination of Co2+ was based on the static quenching to form a complex between the amino group of N-CNDs and Co2+. Inspired by these outstanding properties, practical applications of this nanosensor for the detection of VB12 in actual samples (human serum, egg yolk, VB12 tablets and VB12 injection) and Co2+ in water samples were further verified with satisfactory results. The as-constructed N-CNDs have negligible toxicity and good biocompatibility, which facilitates utilization of N-CNDs in bioimaging of A549 cells and zebrafish, and sensing VB12 in living cells.
Collapse
Affiliation(s)
- Fangfang Du
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
| | | | | | | | | | | | | |
Collapse
|
37
|
Xu X, Ji J, Chen P, Wu J, Jin Y, Zhang L, Du S. Salt-induced gold nanoparticles aggregation lights up fluorescence of DNA-silver nanoclusters to monitor dual cancer markers carcinoembryonic antigen and carbohydrate antigen 125. Anal Chim Acta 2020; 1125:41-49. [PMID: 32674779 DOI: 10.1016/j.aca.2020.05.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/30/2020] [Accepted: 05/09/2020] [Indexed: 11/24/2022]
Abstract
In clinical diagnosis of cancer, the monitoring of single tumor marker may result in many false and missed results, while simultaneous detection of multiple tumor markers should be more accuracy and effective. Here, we report a new strategy that salt-induced gold nanoparticles (AuNPs) aggregation lights up fluorescence of dual-color DNA-silver nanoclusters-aptamer (DNA-AgNCs-apta) for the simultaneous monitoring of carcinoembryonic antigen (CEA) and carbohydrate antigen 125 (CA125). The dual-color aptasensor system is composed of green-emitting DNA-AgNCs with CEA aptamer (gDNA1-AgNCs-apta1) and red-emitting DNA-AgNCs with CA125 aptamer (rDNA2-AgNCs-apta2) in the ratio of 1:1 in volume. Upon addition of AuNPs, gDNA1-AgNCs-apta1 and/or rDNA2-AgNCs-apta2 are flexibly adsorbed onto the surface of AuNPs by terminal aptamer(s), which prevents salt-induced AuNPs aggregation under high salt condition and results in fluorescence quenching based on surface plasmon enhanced energy transfer (SPEET). With the addition of CEA and/or CA125, the target(s) and corresponding aptamer(s) coordinate to form the complex, keeping DNA-AgNCs-apta(s) far away from the surface of AuNPs and making AuNPs aggregated in high salt medium. The AuNPs aggregation leads to the recovery of fluorescence signals of DNA-AgNCs-apta(s) due to weakened SPEET. Utilizing the fluorescence aptasensor system, the limit of detection of CEA and CA125 are as low as 7.5 pg·mL-1 and 0.015 U·mL-1, respectively. The proposed method can be applied to the selective and simultaneous determination of CEA and CA125 in human serum.
Collapse
Affiliation(s)
- Xin Xu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Jiangrong Ji
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Panpan Chen
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Jiafeng Wu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yang Jin
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Liying Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Shuhu Du
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
| |
Collapse
|
38
|
Hashemi F, Heidari F, Mohajeri N, Mahmoodzadeh F, Zarghami N. Fluorescence Intensity Enhancement of Green Carbon Dots: Synthesis, Characterization and Cell Imaging. Photochem Photobiol 2020; 96:1032-1040. [PMID: 32187697 DOI: 10.1111/php.13261] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 02/20/2020] [Indexed: 12/30/2022]
Abstract
The hydrothermal treatment of green carbon dots (CDs) is an appropriate fluorescent probe synthesis method. CDs are exploited as biological staining agents, especially for cellular detection and imaging. The nitrogen-doped green carbon dots (N-CDs) formation can improve the fluorescence intensity property in a one-step process. Here, we report two N-CDs from lemon and tomato extraction in the presence of hydroxylamine. Lemon and tomato N-CDs showed the blue fluorescence under ultraviolet radiation of about 360 nm. The characterization of CDs and N-CDs showed the presence of N-H and C-N bonds which enhanced the fluorescence efficiency. The mean size of lemon and tomato N-CDs were about 2 and 3 nm with an increased quantum yield (QY) of 5% and 3.38%, respectively. The CDs and N-CDs cytotoxicity assay exhibited high cell viability approximately 85% and 73%, respectively. N-CDs show superior fluorescent intensity in different solvents and significant stability under long-time UV irradiation, different PH and high ionic strength. Our results indicated that the use of N-CDs in cell imaging can lead to fluorescence intensity enhancement as well as proper biocompatibility. Therefore, the safe and high fluorescence intensity of green N-CDs can be utilized for fluorescent probes in biolabeling and bioimaging applications.
Collapse
Affiliation(s)
- Fatemeh Hashemi
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Heidari
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasrin Mohajeri
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Nosratollah Zarghami
- Department of Biochemistry and Clinical Laboratories, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
39
|
Abstract
The tunable photoluminescent and photocatalytic properties of carbon dots (CDs) via chemical surface modification have drawn increased attention to this emerging class of carbon nanomaterials. Herein, we summarize the advances in CD synthesis and modification, with a focus on surface functionalization, element doping, passivation, and nanocomposite formation with metal oxides, transition metal chalcogenides, or graphitic carbon nitrides. The effects of CD size and functionalization on photocatalytic properties are discussed, along with the photocatalytic applications of CDs in energy conversion, water splitting, hydrogen evolution, water treatment, and chemical degradation. In particular, the enzyme-mimetic and photodynamic applications of CDs for bio-related uses are thoroughly reviewed.
Collapse
|
40
|
Christé S, Esteves da Silva JC, Pinto da Silva L. Evaluation of the Environmental Impact and Efficiency of N-Doping Strategies in the Synthesis of Carbon Dots. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E504. [PMID: 31973126 PMCID: PMC7040597 DOI: 10.3390/ma13030504] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 01/15/2020] [Accepted: 01/16/2020] [Indexed: 02/02/2023]
Abstract
The efficiency and associated environmental impacts of different N-doping strategies of carbon dots (CDs) were evaluated. More specifically, N-doped CDs were prepared from citric acid via two main synthesis routes: Microwave-assisted hydrothermal treatment with addition of N-containing small organic molecules (urea and ethylenediamine (EDA)); and microwave-assisted solvothermal treatment in N-containing organic solvents (n,n-dimethylformamide (DMF), acetonitrile and pyridine). These syntheses produced CDs with similar blue emission. However, XPS analysis revealed that CDs synthesized via both hydrothermal routes presented a better N-doping efficiency (~15 at.%) than all three solvothermal-based strategies (0.6-7 at.%). However, from the former two hydrothermal strategies, only the one involving EDA as a nitrogen-source provided a non-negligible synthesis yield, which indicates that this should be the preferred strategy. This conclusion was supported by a subsequent life cycle assessment (LCA) study, which revealed that this strategy is clearly the most sustainable one from all five studied synthesis routes.
Collapse
Affiliation(s)
- Suzanne Christé
- Chemistry Research Unit (CIQUP), Faculty of Sciences of University of Porto, R. Campo Alegre 697, 4169-007 Porto, Portugal; (S.C.); (J.C.G.E.d.S.)
| | - Joaquim C.G. Esteves da Silva
- Chemistry Research Unit (CIQUP), Faculty of Sciences of University of Porto, R. Campo Alegre 697, 4169-007 Porto, Portugal; (S.C.); (J.C.G.E.d.S.)
- LACOMEPHI, GreenUPorto, Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences of University of Porto, R. Campo Alegre 697, 4169-007 Porto, Portugal
| | - Luís Pinto da Silva
- Chemistry Research Unit (CIQUP), Faculty of Sciences of University of Porto, R. Campo Alegre 697, 4169-007 Porto, Portugal; (S.C.); (J.C.G.E.d.S.)
- LACOMEPHI, GreenUPorto, Department of Geosciences, Environment and Territorial Planning, Faculty of Sciences of University of Porto, R. Campo Alegre 697, 4169-007 Porto, Portugal
| |
Collapse
|