پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 422 |
| تعداد مقالات | 5,533 |
| تعداد مشاهده مقاله | 6,392,005 |
| تعداد دریافت فایل اصل مقاله | 5,490,648 |
سنتز نقاط کوانتومی کربن (CQDs) از پوست سخت گردو با روش هیدروترمال | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 1، دوره 55، شماره 3، خرداد 1402، صفحه 493-504 اصل مقاله (1.56 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2023.21041.7614 | ||
| نویسندگان | ||
| افسانه شهبازی* ؛ الهام دال | ||
| پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران | ||
| چکیده | ||
| در این پژوهش نقاط کوانتومی کربنی (CQDs) زیست سازگار به صورت تک مرحله ای به روش هیدروترمال از پوست گردو به عنوان منبع کربنی تهیه شده است. اندازه ذرات، شیمی سطح و ساختار کریستالی نقاط کوانتومی کربنی با استفاده از آنالیزهای FTIR, DLS و XRD و ویژگی های نوری ماده با استفاده از آنالیزهای جذبی و فلورسانسی بررسی شد. نتایج به دست آمده نشان داد که نقاط کوانتومی کربن سنتز شده از توزیع اندازه ذرات مناسبی برخوردار بوده و میانگین اندازه ذرات 5/7±2/5 بوده است. البته بیشترین توزیع اندازه ذرات مربوط به 5 تا 6 نانومتر است. همچنین اثر دما بر کربونیزاسیون اولیه بررسی شد که با افزایش دمای کوره پیرولیز درصد کربن نیز افزایش پیدا می کند که درصد کربن در دمای 150 درجه 46 درصد وزنی و در دمای 450 درجه 83 درصد وزنی بوده است. البته تفاوت وزنی کربن تولیدی بین دماهای 350 و 450 درجه بسیار اندک است و با در نظر گرفتن افزایش 100 درجه‌ای دما، دمای 350 درجه به عنوان دمای مناسب برای کربونیزاسیون اولیه پوسته گردو در نظر گرفته شد. نتایج اسپکتروم جذبی و فلورسانسی نشان داده که در طول موج 238 یک پیک جذبی از نمونه مشاهده می شود و نمونه نشر فلورسانی مطلوبی در طول موج 402 نانومتر از خود نشان می دهد. با توجه به نتیجه ی طیف FT-IRبررسی شده سطح کوانتوم دات های کربنی از گروه های عاملی آبدوستی همچون گروه های هیدروکسیل، کربونیل و آمین پوشیده شده است و بر همین اساس انتظار می رود نانو ذرات سنتز شده پراکندگی بالایی در آب نشان دهند. | ||
| کلیدواژه‌ها | ||
| نقاط کوانتومی کربن؛ سنتز؛ پوست گردو؛ هیدروترمال؛ کربونیزاسیون | ||
| موضوعات | ||
| آلودگی آب ، فاضلاب؛ مهندسی محیط زیست | ||
| عنوان مقاله [English] | ||
| Synthesis of quantum carbon dots (CQDs) from hard walnut skin by hydrothermal method | ||
| نویسندگان [English] | ||
| Afsaneh Shahbazi؛ elham dall | ||
| SBU | ||
| چکیده [English] | ||
| In this study, biocompatible carbon quantum dots (CQDs) were prepared in a single step by hydrothermal method from walnut skin as a carbon source. Particle size, surface chemistry and crystal structure of carbon quantum dots were investigated using FTIR, DLS and XRD analyses and the optical properties of the material were investigated using absorption and fluorescence analyses. The results showed that the quantum dots of synthesized carbon had a good particle size distribution and the average particle size was 5.7 ± 2.5. Also, the effect of temperature on initial carbonization was investigated, which with increasing the temperature of the pyrolysis furnace, the percentage of carbon also increased, which was 46% by weight at 150 °C and 83% by weight at 450 ° C. Due to the fact that, the difference in weight of carbon produced between temperatures of 350 and 450 degrees is very small, and considering the increase of 100 degrees, the temperature of 350 degrees was considered as a suitable temperature for the initial carbonization of walnut shell. The results of the absorption spectrum and fluorescence show that at the 238 wavelength an absorption peak of the sample is observed and the sample shows good fluorescence scattering at the wavelength of 402 nm. According to the results of the studied FT-IR spectrum, the quantum surface of carbon dots is covered by hydrophilic functional groups such as hydroxyl, carbonyl and amine groups, and based on this, the synthesized nanoparticles are expected to show high dispersion in water. | ||
| کلیدواژه‌ها [English] | ||
| Carbon Quantum dot, Synthesis, Walnut shell, Hydrothermal, Carbonization | ||
| مراجع | ||
|
[1] N.Yang, X. Jiang, and D.-W. Pang, Improving the functionality of carbon nanodots: doping and surface functionalization. Carbon, (2016). [2] H.Li, Z. Kang, Y. Liu, etal., Carbon nanodots: synthesis, properties and applications. Journal of materials chemistry,22 (2012) 24230-24253. [3] X.Xu, R.Ray, Y. Gu, etal., Electrophoretic Analysis and purification of single_ walled Carbon Nanotubes fragments. Journal of the American Chemical Society,126 (2004)12736-12737. [4] S. Hu, K. Niu, J.Sun, J.Yang, etal., One-step synthesis of fluorescent carbon nanoparticles by laser irradiation. Journal of Materials Chemistry, 19(2009) 484-488. [5] J. Lu, P. Yeo, C. Gan, etal.,Transforming C60 molecules into graphene quantum dots. Nature nanotechnology, 6 (2011)247-252. [6] J. Zhou, C. Booker, R. Li, etal., An Electrochemical Avenue to Blue Luminescent Nanocrystals from Multiwalled Carbon Nanotubes (MWCNTs). Journal of the American Chemical Society, 129(2007) 744-745. [7] D.Pan, J. Zhang, Z. Li, etal., Hydrothermal Route for Cutting Graphene Sheets into Blue-Luminescent Graphene Quantum Dots. Advanced materials,22 (2010)734-738. [8] J. Peng,W. Gao, B.K Gupta, etal., Graphene Quantum Dots Derived from Carbon Fibers . Nano letters, 12 (2012) 844-849. [9] H. Liu, T.Ye, and C. Mao, Fluorescent Carbon Nanoparticles Derived from Candle Soot .Angewandte Chemie International Edition, 46(2007)6473-6475. [10] C.H. Lee,R.M.-S Rajendran., Jeong, etal., Bioimaging of targeting cancers using aptamer-conjugated carbon nanodots . Chemical Communications,49 (2013) 6543-6545. [11] Z-C.Yang, M. Wang, A.M.Yong,etal., Intrinsically fluorescent carbon dots with tunable emission derived from hydrothermal treatment of glucose in the presence of monopotassium phosphate . 47(2011)11615-11617. [12] X. Yan, X.Cui, B. Li, and Li, L.-s., White Light Emission from Unmodified Graphene [13] Z.L. Wu, P.Zhang, M.X.Gao,M.Xetal., One-pot hydrothermal synthesis of highly luminescent nitrogen-doped amphoteric carbon dots for bio imaging from Bombyx mori silk – natural proteins. Journal of Materials Chemistry B, 1(2013) 2868-2873. [14] S.Sahu, B. Behera, T.K. Maiti, and S.Mohapatra, Simple one-step synthesis of highly luminescent carbon dots from orange juice: application as excellent bio-imaging agents. Chemical Communications, 48(2012)8835-8837. [15] B. De, and N.Karak, A green and facile approach for the synthesis of water [16] Wu, Li, M.Luderer, X.Yang, surface passivation of carbon nanoparticles with branched macromolecules influences near infrared bioimaging. Theranostics, 3(2013)677-686. [17] S.Y.Park,H.U. Lee, E.S. Park, Photoluminescent Green Carbon Nanodots from Food Waste-derived Sources: Large-scale Synthesis, Properties and Bio-medical Applications. ACS applied materials & interfaces, 6(2014) 3365-3370. [18] S.Hu et al., Chemical regulation of carbon quantum dots from synthesis to photocatalytic activity. Chemistry–An Asian Journal, 8(5)2013 1035-1041. [19] H. Baweja. K. Jeet. Economical and Green Synthesis of Graphene and Carbon Quantum Dots from Agricultural Waste. materials Research Express 6(8)(2019). [20] S. Pandi. M. Karakoti. S. Dhali. etal., Bulk synthesis of graphene nanosheets from plastic waste: An invincible method of solid waste management for better tomorrow Waste management 88(2019) 49-55. [21] D. P. Singh, A. Thakur, P. Kumar. Green Synthesis of Glowing Carbon Dots from Carica papaya Waste Pulp and Their Application as a Label-freeChemo probe for Chromium Detection in Water. Sensors and Actuators: B. (2018). [22] B. Rooj. A. Dutta, S. Islam, etal., Green Synthesized Carbon Quantum Dots from Polianthes tuberose L. Petals for Copper (II) and Iron (II). Detection. Journal of Fluorescence 28(5)(2018) 1261-1267. [23] M. Sabet. K. Mahdari, Green Synthesis of High Photoluminescence Nitrogen-doped Carbon Quantum Dots from Grass via a Simple Hydrothermal Method for Removing Organic and Inorganic Water Pollutions. Applied surface science 46(32)(2018) 83-291. [24] H.W. Kroto, J.R. Heath, S.C. O'Brien ,etal., This Week's Citation Classic C60: Buckminsterfullerene. Nature 318 (1985)162-163. [25] K.S.G.Novoselov, A.K. Morozov, S.V. Jiang, etal., Synergistic Effect of Fullerene-Capped Gold Nanoparticles on Graphene Electrochemical Supercapacitors. Science,360 (2004) 666-669. [26] A. Himaja, P. Karthik, B. Sreedhar, etal., Synthesis of Carbon Dots from Kitchen Waste: Conversion of Waste to Value Added Product. Journal of Fluorscence 24 (2014)1767-1773. [27] B. De, N. Karak, A green and facile approach for the synthesis of water [28] E. Schneider, A. Bartsch, W. Stark, etal., Safe One-Pot Synthesis of Fluorescent Carbon Quantum Dots from Lemon Juice for a Hands-On Experience of Nanotechnology . Journal of chemical Educaction 96(3)(2019) 540-545. [29] M. Liu, B. Chen, C. Li ,etal., Carbon dots: synthesis, formation mechanism, [30] M. Sabet, K. Mahdari , Green Synthesis of High Photoluminescence Nitrogen-doped Carbon Quantum Dots from Grass via a Simple Hydrothermal Method for Removing Organic and Inorganic Water Pollutions. Applied surface science 46(32) (2018) 83-291. [31] E. Arkan, A. Barati, M. Rahmanpanah, etal., Green Synthesis of Carbon Dots Derived from Walnut Oil and an Investigation of Their Cytotoxic and Apoptogenic Activities toward Cancer Cells . Advanced pharmaceutical Bulletin 8(1) (2018) 149-155. [32] Q. Liang, W. Ma , Y.Shi, etal., Easy synthesis of highly fluorescent carbon quantum dots from gelatin and their luminescent properties and applications. Carbon 60 (2013) 421-428. [33] B. Rooj, A. Dutta, S. Islam, etal., Green Synthesized Carbon Quantum Dots from Polianthes tuberose L. Petals for Copper (II) and Iron (II). Detection. Journal of Fluorescence 28(5) (2018)1261-1267. [34] H. Baweja, K. Jeet, Economical and Green Synthesis of Graphene and Carbon Quantum Dots from Agricultural Waste. materials Research Express 6(8) (2019). | ||
|
آمار تعداد مشاهده مقاله: 1,185 تعداد دریافت فایل اصل مقاله: 2,551 |
||