ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Qi Zeng,Shuhao Tian,Guo Liu,Hongcen Yang,Xiao Sun,Di Wang,Juanjuan Huang,De Yan,Shanglong Peng
Manganese sulfide (MnS) has been found to be a suitable electrode material for lithium-ion batteries (LIBs) owing to its considerable theoretical capacity, high electrochemical activity, and low discharge voltage platform, while its poor electrical conductivity and severe pulverization caused by volume expansion of the material limit its practical application. To improve the rate performance and cycle stability of MnS in LIBs, the structure-control strategy has been used to design and fabricate new anode materials. Herein, the MnS@MXene@CNF (MMC, CNFs means carbon nanofibers) electrode has been prepared by electrospinning and a subsequent high-temperature annealing process. The MMC electrode exhibits excellent cyclic stability with a capacity retention rate close to 100% after 1000 cycles at 1000 mA/g and an improved rate performance with a specific capacity up to 500 mAh/g at a high current density of 5000 mA/g, much higher than the 308 mAh/g of the MnS@CNF (MC) electrode. The elevated electrochemical performance of the MMC electrode not only benefits from the unique structure of MnS nanoparticles evenly dispersed in the well-designed flexible self-supporting three-dimensional (3D) CNF network but, more importantly, also benefits from the formation of sulfur-bridged Mn–S–C bonds at the MnS/MXene interface. The newly formed bonds between MnS and MXene nanosheets can stabilize the structure of MnS near the interfaces and provide a channel for fast charge transfer, which notably increase both the reversibility and the rate of the conversion reaction during the charge/discharge process. This work may pave a new path for designing stable and self-supporting anodes for high-performance LIBs.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2022
·Vol. 13
·期 41
·5889-5896
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IF 5.364
Tuo Di,Yujie Lei,Zhaohui Meng,Yunxia Xia,Xingyu Ma,Heng Jiang,Tiesheng Li,Tiansheng Zhao,Lei Li
The construction of microporous organic polymers (MOPs) with sustainable building blocks is essential for their scale-up preparation and practical applications. Both asphalt and sulfur are massive by-products of the petroleum industry, which are hardly employed for the synthesis of MOPs simultaneously. Here, we develop a new family of MOPs combining asphalt with sulfur via one-pot and catalyst-free polymerization using simple programmed thermal treatment. During the polymerization process, asphalt acts as a rigid building block and is chemically cross-linked by a short sulfur bridge, and thus permanent porosity is introduced into the obtained polymers. The influence of sulfur dosage on the surface area of the obtained MOPs has been investigated in detail. It is found that a maximum surface area of 598 m2 g−1 is achieved when the ratio of asphalt to sulfur is 8 : 2. The versatility of the formation of asphalt-based microporous organic polymers with sulfur bridges is also confirmed by employing other commercially available asphalt samples. In the following carbonization process, the sulfur-containing precursor is converted into carbon materials with a high sulfur content and surface area. The electrochemical performance of this sulfur-doped carbon material demonstrates a capacitance of 372 F g−1 at a current density of 0.5 A g−1 and excellent cycling stability after 10 000 cycles. Therefore, the resultant sulfur-doped carbon material exhibits excellent electrochemical performance and the adoption of new building blocks and the polymerization strategy will significantly promote the development of MOPs.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 51
·45193-45201
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IF 3.289
Yujing Zuo,Zhiming Gou,Jinfeng Cao,Xiaoxiao Li,Shengyu Feng
Polysiloxanes, also known as “silicones”, have received widespread attention as specialty and inorganic backbone polymers since their commercial introduction. However, traditional synthesis routes can only produce polymers with Si–O–Si bonds in the main chains; this limitation influences the rapid development of the silicone industry. As such, new methods for the synthesis of silicones must be developed. This study is the first to introduce the thiol–ene reaction as a modular, efficient, and highly orthogonal method for polymerization. Novel polysiloxanes bearing sulfur atoms in the main chain with adjustable molecular weight were synthesized by the thiol–ene “click” reaction of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane. 1,2-Ethanedithiol was subsequently functionalized using the same method. The structure of these polysiloxanes was characterized by 1H NMR, 13C NMR, and GPC analyses. The new structures of polysiloxanes bearing sulfur atoms in the main chain confer novel properties and applications. Furthermore, incorporating sulfur atoms could linearly increase the refractive index of polysiloxane. Finally, hybrid luminescent materials obtained from functionalized polysiloxanes and lanthanide ions exhibited narrow-width green or red emissions.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
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2021
·Vol. 5
·期 23
·5985-5993
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IF 6.367
Xinran Chen,Yang Li,Lu Chen,Lili Cui,Zhiyu Dou,Xingquan He,Meihong Fan,Tewodros Asefa
Overall water splitting is a promising route to produce green hydrogen in a sustainable manner. However, its practical large-scale use critically requires efficient, sustainable and easy-to-operate catalysts that can drive both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in the same electrolyte. In this report, we present a facile synthesis of one such electrocatalyst that is composed of amorphous sulfur-bridged iron polyphthalocyanine (FeSPPc) grown in situ on CuxO-coated Cu foam. The material is denoted as FeSPPc/CuxO/CF, where x indicates the non-stoichiometric hybrid valence states of Cu, including its +1 and +2 oxidation states. The as-generated material has unique catalytic sites, large electrochemically active surface area, and high electrical conductivity. It electrocatalyzes the HER in N2-saturated KOH electrolyte (1 M) with a current density of 10 mA cm−2 at an overpotential of only 38 mV. It also electrocatalyzes the OER in O2-saturated KOH solution (1 M) with 10 mA cm−2 at an overpotential of 350 mV. The material is stable while catalyzing both reactions as well. Importantly, a water electrolyzer assembled using FeSPPc/CuxO/CF as both cathode and anode electrodes in the same alkaline electrolyte requires only 1.48 V to drive the reaction with 10 mA cm−2 while remaining stable.
研究领域:
材料科学
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电化学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
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2023
·Vol. 28
·期 5
·2250
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IF 4.6
Zixuan Chen,Yuan-Yuan Zhao,Li Li,Ziqing Li,Shuwen Fu,Yihui Xu,Bi-Yuan Zheng,Meirong Ke,Xingshu Li,Jian-Dong Huang
Phthalocyanines are potentially promising photosensitizers (PSs) for photodynamic therapy (PDT), but the inherent defects such as aggregation-caused quenching effects and non-specific toxicity severely hinder their further application in PDT. Herein, we synthesized two zinc(II) phthalocyanines (PcSA and PcOA) monosubstituted with a sulphonate group in the alpha position with “O bridge” and “S bridge” as bonds and prepared a liposomal nanophotosensitizer ([email protected]) by thin-film hydration method to regulate the aggregation of PcSA in the aqueous solution and enhance its tumor targeting ability.[email protected]exhibited highly efficient production of superoxide radical (O2∙−) and singlet oxygen (1O2) in water under light irradiation, which were 2.6-fold and 15.4-fold higher than those of free PcSA, respectively. Furthermore,[email protected]was able to accumulate selectively in tumors after intravenous injection with the fluorescence intensity ratio of tumors to livers was 4.1:1. The significant tumor inhibition effects resulted in a 98% tumor inhibition rate after[email protected]was injected intravenously at an ultra-low[email protected]dose (0.8 nmol g−1PcSA) and light dose (30 J cm−2). Therefore, the liposomal[email protected]is a prospective nanophotosensitizer possessing hybrid type I and type II photoreactions with efficient photodynamic anticancer effects.Keywords:photodynamic therapy;phthalocyanine;liposome;fluorescence imaging;anticancer
研究领域:
光动力疗法
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纳米技术
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癌症研究
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药物化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Xue-Ze Wang,Yang-Hai Zheng,Yun Xue,Yong-De Yan,Fu-Qiu Ma,Mi-Lin Zhang,Hai-Yun Bai,Zi-Qi Kou,Jian-Peng Liu
With the continuous development of the nuclear industry, there is an urgent need to find a method that can safely and efficiently dispose of spent resins. Molten salt oxidation (MSO) is a promising waste treatment technology . In this paper, the newly shipped resins were used to simulate the actual spent ion exchange resins . The destruction of the resins is mainly divided into three stages. The addition of oxygen can increase the activation energy ( E ) required for the reaction. Some solid residues which were proved to be amorphous carbon materials generated after MSO. In the high-resolution XPS spectra of C 1s, the C-S bond disappeared after MSO at 400 ℃ for 2 h proved the destruction of the sulfonic acid groups. The core-level scan XPS spectra of S 2p illustrated that sulfur and sulfonyl bridges were formed after sulfonic acid groups were destroyed. The infrared spectrum also showed that the sulfonic acid groups were destroyed at 400 ℃ to form sulfonyl structure, but sulfur bridges were not found due to its small IR absorptions. In this paper, the ternary eutectic Li 2 CO 3 -Na 2 CO 3 -K 2 CO 3 , can be operated efficiently at a relatively low temperature. The generated sulfur dioxide is captured by the carbonate to form sulfate. These merits make MSO become a promising and environmentally friendly approach for the treatment of sulfur-containing organic waste.
研究领域:
核工业废物处理
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
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IF 5.304
Lei Sun,Hao Guo,Zhilan Pan,Bingqing Liu,Ning Wu,Yinsheng Liu,Zongyan Lu,Xiaoqin Wei,Wu Yang
Owing to the high toxicity of acetaminophen (ACOP) and 4-aminophenol (4-AP) when they are overused, the simultaneous determination of ACOP and 4-AP is crucial. In this present paper, an electrochemical sensor based on the nanocomposite of sulfurbridged covalent triazine frameworks (S-CTFs) and in situ formed nickel cobaltite (NiCo 2 O 4 ) nanoflowers on S-CTFs, denoted as S-CTFs@NiCo 2 O 4 , was fabricated for the first time for sensitive detection of ACOP and 4-AP. S-CTFs@NiCo 2 O 4 modified electrode exhibited the outstanding synergetic effects of S-CTFs (prominent enrichment ability and large surface area) and NiCo 2 O 4 (excellent electrocatalytic activity). The developed electrode had the advantages of high reproducibility, repeatability, anti-interference and stability, and it exhibited a wide linear concentration range (2 ∼ 360 μM) and a low limit of detection (0.18 μM and 0.35 μM) for ACOP and 4-AP, respectively. In addition, the designed electrochemical sensor was evaluated towards the detecting ACOP and 4-AP in real samples with satisfactory recovery, illustrating that electrode has a broad prospect in the clinical application.
研究领域:
分析化学
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电化学
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纳米材料
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药物分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）