检索结果-内蒙古大学图书馆

Diketopyrrolopyrrole-based covalent organic polymer with donor-acceptor structure for efficient near-infrared photothermal conversion

学校读者我要写书评

暂无评论

Journal of Solid State Chemistry 2025年 349卷

作者： Muzaffar, Kamran Gong, Jiacheng Chen, Jinsong Xiao, Zhiwei Umna, Umm Y. Aslam, Tayyab Sohail Zahra Naqvi, Syeda Andleeb Rehman Baloch, Ateeq Ur Borse, Rahul Anil Tan, Yan-Xi Wang, Yaobing CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China University of Chinese Academy of Sciences Beijing100049 China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning530006 China

Efficient near-infrared (NIR) organic photothermal agents are crucial for the effective ablation of cancer cells;however, their synthesis, high performance, and stability remain challenging. In this work, we report the design and synthesis of a covalent organic polymer (COP), TPDA-DPP-COP, constructed through an optimized Schiff-base condensation between tetra(4-aminophenyl) diamine (TPDA) as the electron donor and diketopyrrolopyrrole (DPP) as the electron acceptor, respectively. The morphology, microscopic structure, optical properties, and donor–acceptor (D–A) conjugation effects of TPDA-DPP-COP were systematically investigated using experimental characterizations and theoretical calculations. Benefiting from its extended conjugation and red-shifted absorption, TPDA-DPP-COP exhibited an outstanding NIR photothermal conversion efficiency of 70.2 % in tetrahydrofuran (THF), reaching a maximum temperature of 43.2 °C within 5 min under 808 nm laser irradiation at 0.5 W/cm2. This study provides a promising strategy for the development of efficient and stable NIR photothermal materials for future biomedical applications. © 2025

关键词： Medical nanotechnology

Boosting single-band red upconversion luminescence in colloidal NaErF_4 nanocrystals:Effects of doping and inert shell

学校读者我要写书评

暂无评论

Journal of Rare Earths 2019年第6期37卷 573-579页

作者： Xiangshui Cui Yao Cheng Hang Lin Qingping Wu Ju Xu Yuansheng Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences

Single-band red upconversion luminescence(UCL) is vital to in vivo bioimaging as well as "see and treat" biomedicines. Herein, starting with the previously reported β-NaErF4:Tm UCNPs, we examined the effects of both Yb^(3+) doping and inert shell coating on the red-to-green(R/G) ratio for Er3+ based UCL. The doping of Yb^(3+) into the β-NaErF4:Tm3+ core not only enhances the whole UCL intensity, but also raises the R/G ratio by 1.25 times. In addition, the coating of an inert NaYF4 shell, which is usually adopted for the enhancement of UCL intensity, further boosts the R/G value up to as high as 77.92. This work may benefit the potential bioimaging application of single-band red UCL.

关键词： Yb3+ doping Single-band Upconversion luminescence Core-shell nanostructure Rare earths

Selective Separation of Radioactive Thorium and Uranium from Scandium Using N-Heterocyclic Carboxamide Ligands

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Jin, Chenyang Yang, Xiaofan Fang, Dong Wang, Shihui Ni, Shuainan Ding, Anting Cen, Peng Xiao, Chengliang College of Chemical and Biological Engineering Zhejiang University Hangzhou310058 China Institute of Zhejiang University-Quzhou Zhejiang University Quzhou324000 China Institute of Nuclear Science and Technology Zhejiang University Hangzhou310058 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures China

Scandium is a valuable strategic resource widely dispersed in nature and frequently coexists with other minerals, some of which contain radionuclides, particularly uranium and thorium. It is of great importance to remove these radioactive elements in a green and efficient manner to manufacture superior scandium products. The present study synthesized a range of N-heterocyclic carboxamide ligands and undertook a full investigation of their efficacy in extracting and separating uranium and thorium from scandium. Of these, two demonstrated preferential extraction of radioactive elements in HNO3, while the extraction of scandium was observed in HClO4. Under optimum conditions, 95.3% of uranium and 70.7% of thorium were extracted with only a 3.6% loss of scandium after a single-stage extraction, and the other rare earth elements were scarcely extracted. In addition, almost all the uranium and thorium in a simulated solution were depleted following a five-stage extraction process when treated with the phenanthroline-derived carboxamide ligand, resulting in a scandium oxide product with a 99.99% purity. The coordination mechanism of the extraction was identified using slope analysis, NMR titration, and UV-vis titration. All the evidence indicates that U(VI) and Th(IV) complexes with the phenanthroline-derived carboxamide ligand have a stoichiometry ratio of 1:1, whereas, in the case of scandium, there are both 1:1 and 1:2 species. This work enables the preparation of high-purity scandium with an ultra-low level of radioactivity and provides a new idea for the efficient processing of rare earth minerals. © 2023, The Authors. All rights reserved.

关键词： Ligands

designing Hard Carbon Microsphere Structure Via Halogenation Amination and Oxidative Polymerization Reactions for Sodium Ion Insertion Mechanism Investigation

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Zhao, Yafang Zheng, Jun Zhao, Yanmei Zhang, Kai Fu, Wenwu Wang, Gang Wang, Haodong Hao, Yaowei Lin, Zhiguang Cao, Xiaocao Liu, Jiayi Zhang, Ming Shen, Zhongrong CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on The Structure of Matter Chinese Academy of Sciences Fuzhou350002 China College of Chemistry and Materials Science Fujian Normal University Fuzhou350007 China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen361021 China

Hard carbon as a negative electrode material for sodium-ion batteries has great commercial potential and has been widely studied. The sodium-ion intercalation in graphite domains and the filling of closed pores in the low voltage platform region still remain a subject of controversy. Here we constructed two ideal models with adjustable interlayer spacing, porosity, and defects in the microstructure of hard carbon by using p-Phenylenediamine and dichloromethane as carbon precursors. It was found that the capacity of hard carbon materials mainly originates from intercalation into graphite domains. The research revealed that the prepared hard carbon exhibited a reversible sodium storage capacity of 339.33 mAh g−1 at a current density of 25 mA g−1, with an initial coulombic efficiency as high as 80.23%. It even maintained a reversible sodium storage capacity of 125.53 mAh g−1 at a high current density of 12.8 A g−1. Based on the analysis of hard carbon structure and electrochemical performance, we propose an "adsorption-filling-intercalation" mechanism for sodium storage. © 2023, The Authors. All rights reserved.

关键词： Anodes

An interfacial engineering strategy of electrocatalyst boosts ammonia electrosynthesis

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第8期62卷 921-922页

作者： Yichun Ding Genxiang Wang Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of Sciences

Ammonia (NH3) is not only an essential chemical feedstock for the manufacture of nitrogen-rich fertilizers but also a promising carbofree energy carrier for storing H2 due to its high content of hydrogen (17.6% by mass). At present, industrial NH3 is still dominantly produced by the traditional Haber-Bosch process, which reduces nitrogen (N2) to NH3 (N2+3H2←→2NH 3) at high temperatures (350-550 °C) and high pressures (150-350 atm)[1]. Such a process not only requires the raw materials of high-purity streams of nitrogen and hydrogen but also consumes tremendous energy;noting that the consumed hydrogen occupied approximately 50% of its global production that produced exclusively from transformations of fossil resources with the emission of greenhouse gas [1].

关键词： engineering strategy electrosynthesis tremendous energy

Hard Carbon Derived from Spent Black Tea as a High-Stability Anode for Potassium-Ion Batteries

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Zou, Jingmin He, Cuihong Bao, Jingze Sun, Chuan-Fu Li, Yafeng College of Chemistry Fuzhou University Fujian Fuzhou350108 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials Fuzhou University Fujian Fuzhou350002 China

Hard carbon is derived from spent black tea (THC) through a two-step carbonization process. THC is an easy preparation, green, and high abundance carbon material for high-stability potassium ion storage. As an anode for potassium-ion batteries, it delivers a high reversible capacity of 203 mA h g-1 at 30 mA g-1 and long-term cycling life with 90% capacity retention over 3.6 months. The excellent cycling stability is attributed to the highly reversible structure revealed by Ex-situ Raman spectra. © 2023, The Authors. All rights reserved.

关键词： Anodes

Recovery of thorium and rare earths from leachate of ion-absorbed rare earth radioactive residues with N1923 and Cyanex■572

学校读者我要写书评

暂无评论

Journal of Rare Earths 2021年第10期39卷 1273-1281,I0004页

作者： Jia Su Xiangguang Guo Yun Gao Shan Wu Ruigao Xu Xiaoqi Sun CAS Key Laboratory of Design and Assembly of Functional Nanostructures And Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100039China Longnan County Nanyu Rare Earth Resources Comprehensive Utilization Co. Ltd.Ganzhou 341000China Ganzhou Rare Earth Group Co. Ltd.Ganzhou 341000China

Ion-absorbed rare earth ores radioactive residues(IREORR)are a class of waste residue from the production of rare earth elements(REEs).Because of its radioactive dose,IREORR are usually stored in waste *** are difficult to be disposed ***,it contains relatively high concentrations of REEs,which can be considered as a valuable secondary *** this paper,a novel process is developed for the separation of thorium(Th)and recovery of REEs from IREORR hydrochloric acid leachate with primary amine N1923 and Cyanex?572,*** effects of sulfate concentration,extractant concentration and pH on N1923 extraction in hydrochloric acid solution were investigated in *** results show that the extraction capacity of N1923 can be improved by adding sulfate to the solution and increasing the concentration of *** has little effect on the extraction of Th when pH is higher than *** for the stripping,REEs are more easily stripped from loaded organic phase than Th,and nitric acid is a better stripping agent than hydrochloric *** with the extraction of Cyanex■572 for REEs,a fractional extraction experiment for separating Th and enriching of REEs was *** yield of Th is higher than 99.9%and the concentration of REEs is enriched to 183.84 g/L.

关键词： Radioactive residues Rare earth Thorium Primary amine N1923 Cyanex?572

Bimodal Intelligent Electronic Skin Based on Proximity and Tactile Interaction for Pressure and Configuration Perception

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Wu, Qirui Zhou, Chunhui Xu, Yidan Han, Songjiu Chen, Anbang Zhang, Jiayu Chen, Yujia Yang, Xiaoxiang Huang, Jianren Guan, Lunhui CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350108 China School of Mechanical Engineering and Automation Fuzhou University Fuzhou350108 China Department of Oncology The First Affiliated Hospital of Anhui Medical University Hefei230000 China

The flexible bimodal e-skin exhibits significant promise for integration into the next iteration of human-computer interaction, owing to the integration of tactile and proximity perception. However, those challenges such as low tactile sensitivity, complex fabrication processes, and incompatibility with bimodal interactions have restricted the widespread adoption of bimodal e-skin. Herein, a bimodal capacitive e-skin capable of simultaneous tactile and proximity sensing has been developed. The entire process eliminates intricate fabrication techniques, employing DLP-3D printing for the electrode layers and sacrificial templating for the dielectric layers, conferring high tactile sensitivity (1.672 kPa-1) and rapid response capability (~30 ms) to the bimodal e-skin. Moreover, exploiting the "fringing electric field" effect inherent in parallel-plate capacitors has facilitated touchless sensing, thereby enabling the static distance recognition and dynamic gesture recognition of varying materials. Interestingly, the e-skin sensing array was created to identify the positions and pressure levels of various objects of different masses. Furthermore, with the aid of machine learning techniques, an artificial neural network has been established to possess intelligent object recognition capabilities, facilitating the identification, classification, and training of various object configurations. The advantages of the bimodal e-skin render it highly promising for extensive applications in the field of next-generation human-machine interaction. © 2023, The Authors. All rights reserved.

关键词： Neural networks

Highly Stable Scalable Production of Porous Graphene-Polydopamine Nanocomposites for Drug Molecule Sensing

学校读者我要写书评

暂无评论

SSRN 2024年

作者： Ding, Xiaohong Chen, Ruiqiang Zhang, Cheng Zheng, Longhui Cheng, Huanyu Weng, Zixiang Wu, Lixin Fujian Provincial Key Laboratory of Eco-Industrial Green Technology College of Ecological and Resources Engineering Wuyi University Wuyishan354300 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China Department of Engineering Science and Mechanics Materials Research Institute Pennsylvania State University University ParkPA16802 United States Fujian Key Laboratory of Functional Marine Sensing Materials College of Material and Chemical Engineering Minjiang University Fuzhou350108 China

As atenolol overdosing can lead to severe health complications, the fast detection of atenolol intake in point-of-care settings is highly desirable. The recent advancement of redox analytical methodologies has facilitated the efficacious quantification of these compounds for drug analysis, but their performance is still limited to present challenges in practical applications. This study addresses these challenges by controlling the electropolymerization of polydopamine (PDA) on highly porous laser-induced graphene (LIG) electrodes with enhanced electrochemical redox activity activities for the detection of drug molecules such as atenolol, with minimized interferesnce with the other active substances to induce variation of electrochemical behavior. The enhanced sensitivity of atenolol is attributed to the superhydrophilicity and more active surface sites and -NH2 groups in the PDA polymer through a controlled polymerization process. Moreover, the simulation results further reveal that highly sensitive sensing of atenolol molecules relies on optimal adsorption of atenolol molecule on dopamine or dopaminequinone structural units. The resulting sensors with high repeatability and reproducibility can achieve a low detection limit of 80 µM and a sensitivity of 0.020± 0.04 µA/µM within a linear range from 100 to 800 µM. The materials and surface chemistry in the electrode design based on highly porous LIG provide insights into the integration and application of future scalable and cost-effective electrochemical sensors for use in point-of-care or in-field applications. © 2024, The Authors. All rights reserved.

关键词： Molecules