Carbon Letters最新文献_第7页

Effect of Cu − hydrazine complex formation on HyBRID decontamination reactions for magnetite, nickel ferrite, and chromite 铜-肼复合物的形成对磁铁矿、镍铁矿和铬铁矿 HyBRID 净化反应的影响

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-22 DOI: 10.1007/s42823-024-00744-y

Young-Kyu Han, Jihun Oh, Changhyun Roh

{"title":"Effect of Cu − hydrazine complex formation on HyBRID decontamination reactions for magnetite, nickel ferrite, and chromite","authors":"Young-Kyu Han, Jihun Oh, Changhyun Roh","doi":"10.1007/s42823-024-00744-y","DOIUrl":"10.1007/s42823-024-00744-y","url":null,"abstract":"<div><p>Various transition metal oxides are deposited on the surface of materials such as stainless steel, which is used in the coolant systems of nuclear power plants. The task of removing harmful radionuclides can be solved through the dissolution reaction of the deposited corrosion oxide layer. In this study, for the first time, the reaction thermodynamics of the hydrazine-based reductive metal ion decontamination (HyBRID) reaction developed by the Korea Atomic Energy Research Institute were studied considering the formation of a strong ion − ligand chemical bond complex between Cu ions and hydrazine. When considering complex formation, we found that it had a significant impact on the thermodynamic decontamination reactions of magnetite, nickel ferrite, and chromite. The reactions were proven to be much more thermodynamically favorable than the reaction energies reported thus far, which did not consider complex formation. We demonstrated that not only the thermodynamic energy but also the structures of the HyBRID reaction products can be significantly changed, depending on complex formation considerations.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 8","pages":"2091 - 2098"},"PeriodicalIF":5.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on the development of C-dots via green chemistry: a state-of-the-art review 通过绿色化学开发 C 点的研究：最新进展综述

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-18 DOI: 10.1007/s42823-024-00742-0

Nazia Tarannum, Km. Pooja, Manvi Singh, Anurag Panwar

{"title":"A study on the development of C-dots via green chemistry: a state-of-the-art review","authors":"Nazia Tarannum, Km. Pooja, Manvi Singh, Anurag Panwar","doi":"10.1007/s42823-024-00742-0","DOIUrl":"10.1007/s42823-024-00742-0","url":null,"abstract":"<div><p>Carbon dots (C-dots) are a developing subclass of nanomaterials which are characterized by a typical diameter of less than 10 nm. C-dots are a type of core–shell composites that feature a surface passivation with various functional groups, including amine, carboxyl, hydroxyl group, and a carbon core. Green C-dots, which have drawn a lot of interest from researchers due to their superior water solubility, excellent biocompatibility, and environmental-friendly behavior when compared to chemically generated C-dots, can be made from a variety of low-cost and renewable materials. Since green C-dots have heteroatoms on their surface in the form of carboxyl, amine, hydroxyl, or other functional groups, which can enhance their physicochemical characteristics, quantum yield (QY), and likelihood of visible light absorption, further surface passivation is not necessary. Green C-dots may find use in the areas of biosensing, catalysis, bioimaging, and gene and drug delivery. In this paper, the creation of C-dots was outlined, and its fluorescence process examined. This review represents the summary of synthesis, mechanism, properties, characterization, and applications of C-dots. This article aims at the green chemistry strategies for C-dot synthesis. Furthermore, a discussion on the applications of C-dots produced with green approaches is presented. The paper may help the researchers in the field to develop new C-dots with potential features to attract the attention of new applications.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 6","pages":"1537 - 1568"},"PeriodicalIF":5.5,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141058789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescent carbon quantum dots synthesized from coconut shell for the detection of Fe3+ ion 利用椰壳合成用于检测 Fe3+ 离子的荧光碳量子点

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-16 DOI: 10.1007/s42823-024-00746-w

Kaviyapriya Kirubanithy, Dineshkumar Ponnalagar, Amutha Santhanam

{"title":"Fluorescent carbon quantum dots synthesized from coconut shell for the detection of Fe3+ ion","authors":"Kaviyapriya Kirubanithy, Dineshkumar Ponnalagar, Amutha Santhanam","doi":"10.1007/s42823-024-00746-w","DOIUrl":"10.1007/s42823-024-00746-w","url":null,"abstract":"<div><p>Fluorescent Carbon Quantum Dots (FCQDs), a new generation of carbon nanomaterials, have attracted a lot of attention throughout the years. This paper applied a straightforward and environmentally beneficial way to create water-soluble FCQDs hydrothermally from coconut shells. The as-prepared FCQDs have desirable functional groups and exhibit strong blue-emitting fluorescence with a relative quantum yield of 0.6 and 0.7%. The optical bandgap of FCQDs is calculated using UV–Vis spectra to be between 3.9 and 4.4 eV. Optical studies show that FCQDs have good fluorescence properties when excited at 360 nm. Whereas the fluorescence decay lifetime using TCSPC are 1.6–0.99 ns. The synthesized FCQDs were found by HRTEM to have a spherical shape and a particle-size distribution of 2.8–5.4 nm. As-prepared FCQDs has a very low hemotoxicity of 0.5 to 1.3%, which indicates that they have acceptable biocompatibility and are not hazardous. According to the DPPH antioxidant data, FCQDs had a stronger antioxidant activity compared to earlier reports. These important characteristics enable its applications in biomedical, food packaging, fluorescence imaging, photocatalysis, and sensing. The enhanced antioxidant characteristics of the produced FCQDs make them appropriate for use in biomedical, bioimaging, chemical, and industrial applications. The as-synthesized FCQDs were used for the detection of ferric ions with good selectivity.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 7","pages":"2013 - 2026"},"PeriodicalIF":5.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on molecular weight controlled conducting polymer-based binder for high-performance lithium-ion battery anodes 用于高性能锂离子电池阳极的基于分子量控制的导电聚合物粘合剂研究

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-16 DOI: 10.1007/s42823-024-00745-x

Dong Seok Kim, Sung Hyun Kim, Jin-Yong Hong

{"title":"A study on molecular weight controlled conducting polymer-based binder for high-performance lithium-ion battery anodes","authors":"Dong Seok Kim, Sung Hyun Kim, Jin-Yong Hong","doi":"10.1007/s42823-024-00745-x","DOIUrl":"10.1007/s42823-024-00745-x","url":null,"abstract":"<div><p>To improve the lithium-ion battery performance and stability, a conducting polymer, which can simultaneously serve as both a conductive additive and a binder, is introduced into the anode. Water-soluble polyaniline:polystyrene sulfonate (PANI:PSS) can be successfully prepared through chemical oxidative polymerization, and their chemical/mechanical properties are adjusted by varying the molecular weight of PSS. As a conductive additive, the PANI with a conjugated double bond structure is introduced between active materials or between the active material and the current collector to provide fast and short electrical pathways. As a binder, the PSS prevents short circuits through strong <i>π</i>‒<i>π</i> stacking interaction with active material, and it exhibits superior adhesion to the current collector, thereby ensuring the maintenance of stable mechanical properties, even under high-speed charging/discharging conditions. Based on the synergistic effect of the intrinsic properties of PANI and PSS, it is confirmed that the anode with PANI:PSS introduced as a binder has about 1.8 times higher bonding strength (0.4 kgf/20 mm) compared to conventional binders. Moreover, since active materials can be additionally added in place of the generally added conductive additives, the total cell capacity increased by about 12.0%, and improved stability is shown with a capacity retention rate of 99.3% even after 200 cycles at a current rate of 0.2 C.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 8","pages":"2081 - 2090"},"PeriodicalIF":5.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ construction of N-rich carbon nitride (C3N5)/silver phosphate (Ag3PO4) S-scheme heterojunctions for the efficient photocatalytic removal of levofloxacin antibiotic and RhB 原位构建富含 N 的氮化碳 (C3N5)/ 磷酸银 (Ag3PO4) S 型异质结，用于高效光催化去除左氧氟沙星抗生素和 RhB

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-16 DOI: 10.1007/s42823-024-00741-1

Xiaodong Liu, Yuanfei Li, Huanli Wang, Jiayuan Liu, Jingchuan Fu, Jia Liu, Shijie Li

{"title":"In situ construction of N-rich carbon nitride (C3N5)/silver phosphate (Ag3PO4) S-scheme heterojunctions for the efficient photocatalytic removal of levofloxacin antibiotic and RhB","authors":"Xiaodong Liu, Yuanfei Li, Huanli Wang, Jiayuan Liu, Jingchuan Fu, Jia Liu, Shijie Li","doi":"10.1007/s42823-024-00741-1","DOIUrl":"10.1007/s42823-024-00741-1","url":null,"abstract":"<div><p>Building step-scheme (S-scheme) heterojunctions has recently emerged as a highly effective approach for developing superior photocatalysts for water purification. Herein, a C<sub>3</sub>N<sub>5</sub>/Ag<sub>3</sub>PO<sub>4</sub> (CA) S-scheme heterojunction was prepared by in situ growth of Ag<sub>3</sub>PO<sub>4</sub> nanoparticles on 2D C<sub>3</sub>N<sub>5</sub> nanosheets. Notably, under visible-light irridiation, CA exhibited significantly higher activity in the photodegradation of LEVO, which is about 28.38, 2.41, and 2.14 times higher than the rates for C<sub>3</sub>N<sub>5</sub>, Ag<sub>3</sub>PO<sub>4</sub>, and the mixture, respectively. Based on the radical scavenging experiments, the mechanism for enhanced photocatalytic performance has been analyzed, is attributed to improved interfacial charge separation, the elevated redox potential of photon-generated electrons and holes, and the increased generation of active species resulting from the S-scheme transfer of photoinduced carriers. Additionally, CA demonstrates greater stability than either C<sub>3</sub>N<sub>5</sub> or Ag<sub>3</sub>PO<sub>4</sub> alone in the photo-oxidation of LEVO and the photodegradation of RhB. In essence, this study not only deepens our comprehension of the photocatalytic mechanism of CA, but also pioneers a novel concept for the development of highly effective and stable S-type heterojunction photocatalysts.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 7","pages":"1995 - 2011"},"PeriodicalIF":5.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140966779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of tensile strength and anti-oxidation property of graphite electrode for electric arc furnace through heterogenization of binder pitch 通过粘结剂沥青的异质化提高电弧炉用石墨电极的抗拉强度和抗氧化性能

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-15 DOI: 10.1007/s42823-024-00736-y

Kohei Ono, Minki Sung, Yuanshuo Peng, Seung-Jae Ha, Young-Pyo Jeon, Takahashi Ikuya, Hamaguchi Shusaku, Feiyu Kang, Hyeonseok Yi, Joo-Il Park, Koji Nakabayashi, Jin Miyawaki, Seong-Ho Yoon

{"title":"Improvement of tensile strength and anti-oxidation property of graphite electrode for electric arc furnace through heterogenization of binder pitch","authors":"Kohei Ono, Minki Sung, Yuanshuo Peng, Seung-Jae Ha, Young-Pyo Jeon, Takahashi Ikuya, Hamaguchi Shusaku, Feiyu Kang, Hyeonseok Yi, Joo-Il Park, Koji Nakabayashi, Jin Miyawaki, Seong-Ho Yoon","doi":"10.1007/s42823-024-00736-y","DOIUrl":"10.1007/s42823-024-00736-y","url":null,"abstract":"<div><p>This study involved the heterogenization of a binder pitch (BP) using a small amount of nanocarbon to improve physical properties of the resulting graphite electrode (GE). Heterogenization was carried out by adding 0.5–2.0 wt.% platelet carbon nanofiber (PCNF) or carbon black (CB) to a commercial BP. To evaluate the physical properties of the BPs, we designed a new model graphite electrode (MGE) using needle coke as a filler. The heterogenized binder pitch (HBP) with PCNF or CB clearly increased the coking value by 5–13 wt.% compared to that of the as-received BP. Especially, the model graphite electrodes prepared with HBPs containing 1.0 wt.% PCNF or CB showed significantly improved physical properties compared to the control MGE from the as-received BP. Although the model graphite electrodes prepared with HBPs showed similar properties, they had smaller pore sizes than the control. This indicates that heterogenization of the BP can effectively decrease the pore size in the MGE matrix. Correlating the average pore sizes with the physical properties of the model graphite electrodes showed that, for the same porosity, matrices formed by the HBP with a smaller average pore size can effectively improve the apparent density, tensile strength, and oxidation resistance of the model graphite electrodes.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 7","pages":"1981 - 1993"},"PeriodicalIF":5.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superparticle of multidirectional graphitic nanospheres derived from metal–organic mesocrystal for fast-chargeable lithium-ion battery anode 用于快速充电锂离子电池负极的金属有机介晶衍生多向石墨纳米球超级粒子

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-10 DOI: 10.1007/s42823-024-00740-2

Jae Seo Park, Yeon Jeong Jeong, Dong Yoon Park, Hyunji Shin, Da Hee Jang, So Eun Kim, Jeong Heon Ryu, Seo Mi Yang, Jang-Yul Kim, Jae Ho Kim, Seung Jae Yang

{"title":"Superparticle of multidirectional graphitic nanospheres derived from metal–organic mesocrystal for fast-chargeable lithium-ion battery anode","authors":"Jae Seo Park, Yeon Jeong Jeong, Dong Yoon Park, Hyunji Shin, Da Hee Jang, So Eun Kim, Jeong Heon Ryu, Seo Mi Yang, Jang-Yul Kim, Jae Ho Kim, Seung Jae Yang","doi":"10.1007/s42823-024-00740-2","DOIUrl":"10.1007/s42823-024-00740-2","url":null,"abstract":"<div><p>Mesocrystals are macroscopic structures formed by the assembly of nanoparticles that possess distinct surface structures and collective properties when compared to traditional crystalline materials. Various growth mechanisms and their unique features have promise as material design tools for diverse potential applications. This paper presents a straightforward method for metal–organic coordination-based mesocrystals using nickel ions and terephthalic acid. The coordinative compound between Ni<sup>2+</sup> and terephthalic acid drives the particle-mediated growth mechanism, resulting in the mesocrystal formation through a mesoscale assembly. Subsequent carbonization converts mesocrystals to multidirectional interconnected graphite nanospheres along the macroscopic framework while preserving the original structure of the Ni-terephthalic acid mesocrystal. Comprehensive investigations demonstrate that multi-oriented edge sites and high crystallinity with larger interlayer spacing facilitate lithium ion transport and continuous intercalation. The resulting graphitic superparticle electrodes show superior rate capability (128.6 mAh g<sup>−1</sup> at 5 A g<sup>−1</sup>) and stable cycle stability (0.052% of capacity decay per cycle), certifying it as an advanced anode material for lithium-ion batteries.</p></div>","PeriodicalId":506,"journal":{"name":"Carbon Letters","volume":"34 7","pages":"1971 - 1980"},"PeriodicalIF":5.5,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Na3.8MnV0.8Zr0.2(PO4)3/C/rGO composite cathode for sodium-ion battery with enhanced cycling stability and rate capability 用于钠离子电池的 Na3.8MnV0.8Zr0.2(PO4)3/C/rGO 复合正极，具有更高的循环稳定性和速率能力

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-07 DOI: 10.1007/s42823-024-00739-9

Lei Zheng, Ao Tang, Xiaofei Gong, Chaoqun Shang, Pu Hu

引用次数: 0

Investigation of freeze–thaw deterioration effects on electrical properties and electric-heating capability of CNT-CF incorporated cement mortar 冻融劣化对掺入 CNT-CF 的水泥砂浆电气性能和电热能力的影响研究

IF 5.5 3区材料科学

Carbon Letters Pub Date : 2024-05-02 DOI: 10.1007/s42823-024-00738-w

H. N. Yoon, Won-Taek Hong, Jongwon Jung, Chiyoung Park, Daeik Jang, Beomjoo Yang

引用次数: 0

Effect of mesophase formation from quinoline insoluble-containing coal tar pitch on physical properties of carbon blocks 含喹啉的煤焦油沥青形成的介相对碳块物理性质的影响