JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Jiaxuan Dong,Yifan Lv,Yiyang Li,Kexin Xu,Xinrui Cui,Cun-Yue Guo,Baolin Li
Thienoacenes are a prominent class of fused-ring conjugated organic compounds and have attracted considerable attention due to their high coplanarity, good stability, high charge-carrier mobility, etc. However, most current synthetic methods toward thienoacenes require costly starting materials and reagents, as well as a lengthy synthetic procedure with low overall yields. Herein, a nonprecious copper-catalyzed system without additional ligands was developed to facilitate C–S coupling and 5-endo-dig thienannulation reaction, leading to the synthesis of a range of thienoacenes including dithieno[3,2-b:2′,3′-d]thiophenes (DTTs) and thieno[2′,3′:4,5]thieno[3,2-b]thiophene[2,3-d]thiophene (TTAs) with yields of up to 90% (for single-sided thienannulation reactions) and 65% (for double-sided thienannulation reactions). In addition, three π-extended DTTs were studied as potential thermoelectric materials, and their composites with single-walled carbon nanotubes (SWCNTs) exhibited high thermoelectric performance with the power factor up to 399.01 ± 16.26 μW m–1 K–2 at room temperature, which is the highest reported for thermoelectric composites comprising small-molecule thiophene derivatives and SWCNTs, signifying a step forward in the development of high-performance thermoelectric composites based on thiophene derivatives.
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PubMed
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Baomin Wang,Weigao Ding,Chengcheng Fan,Fei Liu,Wenxin Lu,Haoxiang Yang
C-S-H gel is a complex cementitious system, and the properties present significant difference with various Ca/Si ratios. The immobilization mechanism of three heavy metals in C-S-H gel at various Ca/Si ratios was investigated in this work from the prospect of the physical adsorption and chemical immobilization. Results showed that higher Ca/Si ratios can result in an increase in silicon chain polymerization, and lower BET specific area, and C-S-H gel with various Ca/Si ratios showed the excellent immobilization for heavy metals. Pb(II) and Zn(II) can form hydroxyl complex polyhedra in C-S-H under strongly alkaline environments, and increase the silicon chain polymerization degree similar to the doping of C-S-H gel by Al. However, Cd(II) was immobilized in the C-S-H gel with the formation of a solid solution under the action of ion exchange with Ca(II), rather than in the form of hydroxyl complex polyhedral and cadmium hydroxide coprecipitates. The highest adsorption capacity of Pb(II) was realized in C-S-H gel with a Ca/Si molar ratio of 0.9, reaching 95.6006 mg/g. Pb(II) was mainly immobilized in C-S-H gel via physical and chemical adsorption, and the effect of chemical adsorption tended to be significant as the Ca/Si molar ratio increased. And the formation of Pb 8 Ca(Si 2 O 7 ) 3 can be detected in C-S-H gel with a higher Ca/Si molar ratio.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Feng Hu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
In this study, the novel Co/C/LaFeO 3 composites were synthesized by in-situ growth of LaFeO 3 on Co/C derived from ZIF-67. The electromagnetic wave (EMW) absorption performance of the Co/C/LaFeO 3 composites was investigated with varying proportions of Co/C and LaFeO 3 . When the weight ration of Co/C to LaFeO 3 was 2:1, the Co/C/LaFeO 3 composites exhibited a remarkable minimum reflection loss (RL min ) of −57.8 dB and demonstrated an effectively absorbing broadband (EAB, RL min ≤ -10 dB) of 5.12 GHz at 1.7 mm. Benefiting from the combined impact of Co nanoparticles, carbon layer, and LaFeO 3 , diverse interfaces and conductive networks were formed, and optimized impedance matching was obtained. In addition, the incorporation of LaFeO 3 significantly enriched the electromagnetic loss mechanisms, ultimately enhancing the comprehensive EMW absorption efficiency of the Co/C/LaFeO 3 composites. This research serves as an essential guide for designing and synthesizing MOF-derived carbon composites with significant EMW absorption capacities.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Susu Zhang,Congcong Huang,Zengyu Sun,Penghua Jiao,Baoqi Ding,Luyao Ding,Qianfen Qi,Yanzhe Gou,Renlong Zhang,Yanhao He,Wenjun Li,Chunguang Ren,Linlin Wang
Hydrogels with antioxidant and antibacterial activities have received increasing attention in wound healing due to excessive reactive oxygen species (ROS) and bacterial infection are common issues associated with wounds. Herein, we constructed a series of hydrogels with C-phycocyanin (C-PC), quaternized chitosan (QCS) and silk fibroin protein (SF) as matrixes, which with tetrakis hydroxymethyl phosphonium sulfate (THPS) as crosslinking agent to form dynamic covalent bonds with C-PC and SF. The hydrogel exhibited excellent stretchability and compressibility, which with adhesion strength reached 15 ± 3 kPa and rapid self-healing properties. The hydrogel possessed strong antioxidant activity with assessments of DPPH radical-scavenging capacity and total reducing power. In addition, the hydrogel possessed obvious coagulation function and good blood compatibility, which also showed strong antibacterial activity against E. coli and S. aureus . To improve the therapeutic effect, polydeoxyribonucleotide (PDRN) with the ability of promote wound healing was introduced into the hydrogel. The results showed that the hydrogel loading with PDRN possessed high biocompatibility and can promote cell migration. More importantly, the hydrogel loaded with PDRN can effectively promote wound healing by exerting anti-inflammatory and antioxidant effects, which may offer promising potential application value in the field of wound dressing and tissue repair.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Rong Cheng,Xiaozhen Fang,Yulin Wang,Chengzhen Gu,Xinyu Zheng,Mingwei Yang
The electrooxidation of dopamine (DA) and uric acid (UA) suffers from significant signal overlapping due to their similar oxidative potentials. In this study, a composite material consisting of carbon film coating on the surface of anatase TiO 2 (TiO 2 @C) is proposed for the simultaneous detection of DA and UA. The synergistic effect of TiO 2 @C, which includes enhanced charge transfer efficiency and improved conductivity, significantly promotes the electrooxidation process. TiO 2 @C is prepared via a simple calcination approach by annealing MIL-125 at 750 °C under a nitrogen atmosphere. Systematic material characterization, including x-ray diffraction, high-resolution transmission electron microscopy, Raman spectroscopy, etc., is performed to confirm the structural properties and surface composition of TiO 2 @C. TiO 2 @C is then used to modify a glassy carbon electrode (GCE) via drop-coating. A series of electrochemical measurements are conducted for the detection of DA and UA. After optimizing the measurement procedure, simultaneous detection of DA and UA is achieved, with linear ranges of 0.2 to 200 μM for DA and 0.2 to 40 μM for UA, and detection limits of 0.11 μM for DA and 0.09 μM for UA (D = 3σ/k). Further evaluations, including anti-interference testing, stability, and reusability, provide a comprehensive understanding of TiO 2 @C’s performance. Finally, the TiO 2 @C/GCE is applied to determine DA and UA in human urine samples, yielding recoveries between 100.19–101.87 % for DA, and 93.09 %–105.30 % for UA. This study highlights the synergistic effect of TiO 2 @C in electrode modification, demonstrating its potential for the sensitive and selective electrochemical detection of DA and UA.
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高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
XianYan Jiang,ShuPing Deng,JunJie Liu,Ning Qi,ZhiQuan Chen
In this work, metal oxide/metal@carbon (NiO/Ni@C) composites as electrode materials have been successfully prepared using the pillared Ni 2 (bdc) 2 (dabco) (bdc = 1,4-benzenedicarboxylic acid, dabco = 1,4-diazabicyclo[2.2.2]-octane) as the precursor. Owing to the multiple active sites (NiO, Ni and Carbon), rich oxygen defects, and abundant Ni 3 + , the NiO/Ni@C composites show excellent electrochemical performance. A maximum specific capacitance of 805.3 F g −1 at 0.5 A g −1 and 576.2 F g −1 at 10 A g −1 is obtained for the NiO/Ni@C electrode material calcined at 500 °C, indicating a high rate capability. Meanwhile, the assembled asymmetric supercapacitor (ASC) NiO/Ni@C//PEDOT-AC (poly(3,4-ethylenedioxy-thiophene)-activated carbon) has a wide working voltage of 0–1.7 V, high specific energy of 20.7 W h kg −1 , superior specific power of 12920 W kg −1 , and excellent cycle stability with capacitance retention of 69.7% after 10 000 cycles. Furthermore, a red light-emitting diode (LED) is lighted up by two NiO/Ni@C//PEDOT-AC ASCs in series connection.
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高影响因子
Energy & Environmental Materials
·
2021
·Vol. 5
·期 2
·543-554
·
IF 15.122
Yu Ma,Ding Chen,Weijun Li,Yapeng Zheng,Lin Wang,Gang Shao,Qiao Liu,Weiyou Yang
The design of efficient cathode with great cycle performance, high flexibility, and low cost is essential for the commercialization of zinc–air battery (ZAB). Herein, we report the exploration of freestanding bifunctional cathode with rationally designed structures, namely, tiny Co nanoparticles embedded in N-doped carbon nanofiber aerogels, which have desired features including uniform Co dispersity, balanced distribution of N-C species, hierarchically porous structure with increased fraction of meso- to micropores, and moderate amounts of defects. Accordingly, the as-fabricated cathodes exhibit positive half-wave potential of 0.82 V for oxygen reduction and small overpotential of 350 mV at 10 mA cm −2 for oxygen evolution, respectively, which deliver smaller reversible oxygen electrode index (0.76 V) than the commercial Pt/C+RuO 2 (0.80 V) and most Co-based electrocatalysts ever reported. Impressively, the as-constructed liquid rechargeable ZAB behaves high peak power density (160 mW cm −2 ), large specific capacity (759.7 mAh g −1 at 10 mA cm −2 , tested after 120 h of OCV tests), and robust stability over 277 h. Moreover, the as-assembled quasi-solid-state ZAB using such freestanding cathode represents excellent mechanical flexibility and outstanding cycle performance, regardless of being serviced under extremely bending conditions from 0° to 180°, underscoring their promising applications as durable bifunctional cathode for portable metal–air batteries.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 2
·1-8
·
IF 2.983
Song Lixin,Qi Xueyang,Jing Wanru,Ke Huizhen,Chen Wei-Hsiang,Xiong Jie
The flexible nitrogen (N) doped TiO 2 /C nanofibrous film (NTC f ) was fabricated by a combination of electrospinning and annealing treatment. The BET surface area of the NTC f increases, reaches largest value, and then decreases slightly with increasing of N. And the NTC f -20 has a maximum BET surface area of 175.60 m 2 ·g −1 . These are beneficial to the absorption of dye by the photocatalyst. At the same time, the N doping could increase the light absorption of TiO 2 and is favorable to the charges transfer of the carbon nanofibers, resulting in improving the photocatalytic activity of NTC f under visible light. As a result, all the NTC f showed excellent photocatalytic performance. Moreover, with the increase of N concentration, the photocatalytic activity of the NTC f increased, reaching the largest value before decreasing. And the highest photocatalytic degradation efficiency of Rhodamine B (RhB) was about 99.1% for 1 h by using NTC f -20. After that, the NTC f film was stuck on organza fabric to form a photocatalytic fabric by hot pressing. And the photocatalytic fabric with degradation efficiency of 98.5% was easily separated from the dye solution and possessed excellent reusability. It has huge potential application in pollutant disposal in flowing water.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shouhui Chen,Rihui Zhou,Yaqin Chen,Ping Li,Yonghai Song,Li Wang
Zeolitic imidazolate frameworks are a class of metal organic frameworks which are very attractive for their pore structures. However, their pore size and the BET surface would shrink when they underwent heat treatment at high temperature. On the other hand, liquid metal in MOFs might flow through the pores and prevent the shrinkage when pyrolysis. As is known that metallic Sn is liquid when the temperature is above 232 °C, flowing Sn might support and maintain the porous structure of MOFs during the pyrolysis. In this work, porous Sn/C-ZnO core-shell structures were prepared as anodes for LIBs via a two-step method. Firstly, SnO 2 particles were encapsulated in a ZIF-8 layer with different thickness. Then Sn/C-ZnO was generated in inert atmosphere at 700 °C. A Sn/C-ZnO composite, with 11.2% of Sn and 21.0% of ZnO in content, had a BET surface of 32.9 m 2 g -1 . Another Sn/C-ZnO composite, with 55.1% of Sn and 1.8% of ZnO in content, had a larger BET surface of 297 m 2 g -1 . Then the two composites were tested as anodes for LIBs. Although the BET surface of the former was significantly less than that of the latter before cycling and the content of Sn in the former was also much lower than that of the latter, the discharge capacity of the former after 50 cycles was 515.6 mAh g -1 at 100 mA g -1 in the potential of 0.01~3.00 V, which was slightly higher than that of the latter.
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高影响因子
Energy Storage Materials
·
2018
·
IF 0
Jing Xia,Li Liu,Sidra Jamil,Jianjun Xie,Hanxiao Yan,Yiting Yuan,Yue Zhang,Su Nie,Jing Pan,Xianyou Wang,Guozhong Cao
The development of flexible energy storage devices is the key to widen the application of flexible electronics and wearable devices . Flexible electrodes with superior electrochemical performance are critical components for flexible energy storage devices. Herein, we propose a simple and versatile electrospinning strategy to prepare the SnS/C nanofibers (SnS/C NFs) film. By using SnS/C NFs film directly as a free-standing anode in both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), it can provide outstanding electrochemical performance. For LIBs, it delivers high capacities of 648 and 548 mA h g -1 at 200 and 500 mA g -1 respectively after 500 cycles. It even shows outstanding cyclability for 1000 cycles. For SIBs, it retains capacity of 481 mA h g -1 after 100 cycles at 50 mA g -1 . Moreover, the capacity remains as high as 349 mA h g -1 at 200 mA g -1 after 500 cycles. The outstanding electrochemical performance is mainly attributed to the fact that the fine SnS nanoparticles dispersed in one-dimensional porous nanofibers with uniform diameters around 130 nm shorten the transport path of ions and electrons, and the presence of N-doped carbon enhanced the electrical conductivity as well as relieve the volume change caused by the alloying/de-alloying reaction. Besides, the ultra-robust mechanical flexibility of SnS/C NFs film makes it a promising anode candidate for flexible LIB and SIB in future.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 50
·505402
·
IF 3.953
Wenjing Yu,Shaohua Zhang,Kun Gao,Xiangyun Lin,Yuyang Han,Zhipan Zhang
Co3O4-MoSe2@C nanocomposite has been prepared by a convenient method via combining hydrothermally synthesized MoSe2@C and Co3O4. When catalyzing the hydrogen evolution reaction and oxygen evolution reaction, the catalyst features low overpotentials of 144 mV and 360 mV (both at 10 mA cm−2 current density), respectively. It can also serve as the cathode in the lithium-oxygen battery and the device shows a low charging-discharging overpotential of 1.50 V with a stable performance of over 200 cycles at current density of 1000 mA g−1, shedding light on the design and synthesis of novel multifunctional electrocatalysts for energy conversions.
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高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Ming Li,Jun-Yang Tao,Liang-Neng Wang,Jia-Wei Li,Yue-Jin Liu,Ming-Hua Zeng
Modification of commercially available biaryl monophosphine ligands via ruthenium(II)-catalyzed P(III)-directed-catalyzed ortho C–H secondary alkylation is described. The use of highly ring-strained norbornene as a secondary alkylating reagent is the key to this transformation. A series of highly bulky ligands with a norbornyl group were obtained in excellent yields. The modified ligands with secondary alkyl group outperformed common substituted phosphines in the Suzuki–Miyaura cross-coupling reaction at a ppm mole level of Pd catalyst.
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高影响因子
危险品化学品经营许可证（带存储）