MOLECULES
·
2020
·Vol. 25
·期 7
·1585
·
IF 3.267
Jianhui Zhu,Amr Abdelkader,Denisa Demko,Libo Deng,Peixin Zhang,Tingshu He,Yanyi Wang,Licong Huang
Room temperature sodium-sulfur batteries have been considered to be potential candidates for future energy storage devices because of their low cost, abundance, and high performance. The sluggish sulfur reaction and the “shuttle effect” are among the main problems that hinder the commercial utilization of room temperature sodium-sulfur batteries. In this study, the performance of a hybrid that was based on nitrogen (N)-doped carbon nanospheres loaded with a meagre amount of Fe ions (0.14 at.%) was investigated in the sodium-sulfur battery. The Fe ions accelerated the conversion of polysulfides and provided a stronger interaction with soluble polysulfides. The Fe-carbon nanospheres hybrid delivered a reversible capacity of 359 mAh·g−1at a current density of 0.1 A·g−1and retained a capacity of 180 mAh·g−1at 1 A·g−1, after 200 cycles. These results, combined with the excellent rate performance, suggest that Fe ions, even at low loading, are able to improve the electrocatalytic effect of carbon nanostructures significantly. In addition to Na-S batteries, the new hybrid is anticipated to be a strong candidate for other energy storage and conversion applications such as other metal-sulfur batteries and metal-air batteries.Keywords:sodium-sulfur battery;catalytic activity;hollow N-doped carbon nanospheres;chemical absorption;polysulfides
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高影响因子
MACROMOLECULES
·
2020
·
IF 5.918
Jia Wang,Yue Chen,Canbin Ye,Anjun Qin,Ben Zhong Tang
The heteroatom-containing polymers are important components of advanced functional materials. Among the tremendous synthetic methodologies, polymerization via C–H activation is a powerful tool for the preparation of functional heteroatom-containing polymers, which should be further enriched, especially via C(sp3)–H activation. In this work, a new atom economic Pd(0)/benzoic acid catalyzed polymerization of internal diynes and secondary diamines via C(sp3)–H activation; i.e., C(sp3)–H polyamination of internal alkynes was successfully established. A series of regio- and stereoregular functional poly(allylic tertiary amine)s with high weight-average molecular weights (Mw, up to 25 600) were synthesized in excellent yields (up to 98%). The resultant polymers possess good solubility and film-forming ability, and their thin films exhibit high refraction indices (RI) with the range of 1.7207–1.6797 at 632.8 nm. Moreover, all the poly(allylic tertiary amine)s are emissive in solution and solid states. Thanks to the tolerance to functional groups of this polymerization, the tetraphenylethene (TPE) moiety could be facilely incorporated to endow the resultant polymers with the unique aggregation-enhanced emission (AEE) characteristics. Thus, this work not only establishes a powerful C(sp3)–H polyamination but also provides a strategy to facilely prepare functional nitrogen-containing acetylenic polymers.
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FIRE SAFETY JOURNAL
·
2020
·
IF 2.295
Qianqian Zhang,Jun Wang,Shuang Yang,Jianwen Cheng,Guoping Ding,Yefa Hu,Siqi Huo
In order to meet the requirement in the fields with high flame resistance, the flame retardancy of epoxy resin (EP) must be ameliorated. Herein, a P/N/S-based flame retardant (PAD) was synthesized and used to prepare flame retardant EP. The combustion behavior, thermal property and flame retardant mechanism of the prepared EP thermosets were investigated. PAD induced the decomposition of EP thermoset in advance. Meanwhile, PAD enhanced the flame retardance of EP thermosets and reduced the fire risk of EP matrix. For example, with only 0.5 wt% phosphorus, EP/DDS/PAD-0.5 easily passed UL-94 V-0 rating and achieved a LOI value of 33.6%, together with the declined heat release rate (HRR). Impressively, the glass transition temperature (T g ) of EP/DDS/PAD thermosets dropped by only 3–13 °C, compared with that of EP/DDS. During combustion, PAD prompted the formation of an intumescent char layer in condensed phase, and exerted blowing-out effect in gaseous phase .
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Acta Biomaterialia
·
2023
·
IF 9.7
Yuelin Lv,Cuihong Chen,Liguo Jin,Yufeng Zheng,Shuilin Wu,Yu Zhang,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Xiangmei Liu
Owing to its deep penetration capability, microwave (MW) therapy has emerged as a promising method to eradicate deep-seated acute bone infection diseases such as osteomyelitis. However, the MW thermal effect still needs to be enhanced to achieve rapid and efficient treatment of deep focal infected areas. In this work, the multi-interfacial core-shell structure barium sulfate/barium [email protected] (BaSO 4 /BaTi 5 O 11 @PPy) was prepared, which exhibited enhanced MW thermal response via the well-designed multi-interfacial structure. To be specific, BaSO 4 /BaTi 5 O 11 @PPy achieved rapid temperature increases in a short period and efficient clearance of Staphylococcus aureus ( S. aureus ) infections under MW irradiation. After 15 min MW irradiation, the antibacterial efficacy of BaSO 4 /BaTi 5 O 11 @PPy can reach up to 99.61 ± 0.22%. Their desirable thermal production capabilities originated from enhanced dielectric loss including multiple interfacial polarization and conductivity loss. Additionally, in vitro analysis illuminated that the underlying antimicrobial mechanism was attributed to the noticeable MW thermal effect and changes in energy metabolic pathways on bacterial membrane instigated by BaSO 4 /BaTi 5 O 11 @PPy under MW irradiation. Considering remarkable antibacterial efficiency and acceptable biosafety, we envision that it has significant value in broadening the pool of desirable candidates to fight against S. aureus -infected osteomyelitis. Statement of significance The treatment of deep bacterial infection remains challenging due to the ineffectiveness of antibiotic treatment and the susceptibility to bacterial resistance . Microwave (MW) thermal therapy (MTT) is a promising approach with remarkable penetration to centrally heat up the infected area. This study proposes to utilize the core-shell structure BaSO 4 /BaTi 5 O 11 @PPy as an MW absorber to achieve localized heating under MW radiation for MTT. In vitro experiments demonstrated that the disrupted bacterial membrane is primarily due to the localized high temperature and interrupted electron transfer chain. As a consequence, its antibacterial rate is as high as 99.61% under MW irradiation. It is shown that the BaSO 4 /BaTi 5 O 11 @PPy is a promising candidate for eliminating bacterial infection in deep-seated tissues.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2015
·Vol. 22
·期 5
·1-11
·
IF 1.92
Li Zhi-min,Zhang Gang,Li Yan,Yang Jie
The homo- and co-poly(p-phenyene ether sulfone benzimidazole/sulfide sulfone benzimidazole)s (PESI/PPSSI) had been prepared by solution polycondensation of the mixtures of 4,4′-dicarboxydiphenyl ether (DCDPE) and 4,4′-dicarboxydiphenyl sulfide (DCDPS) with 3,3′,4,4′-tetraanmino diphenyl sulfone (TADS) in polyphosphoric acid (PPA). The FT-IR, 1 H-NMR, DSC, TGA, XRD were used to characterize chemical structure and thermal stabilities of the resultant homo- and co-polymers. The inherent viscosities of the resultant polymers were in the range of 0.621–0.982 dl/g at the polymer concentration of 0.5 %. They were found to have excellent thermal properties with glass transition temperatures (T g ) of 386–393 °C, 5 % weight-loss temperature (T 5% ) of 512–525 °C. These polymers showed amorphous nature as charactered by XRD. Most importantly, the resultant polymers possess good solubility that they can be soluble in various aprotic solvents such as N-methyl-2-pyrolidinone (NMP), dimethyl sulfoxide (DMSO) and 1,3-dimethyl-2-imidazolidinone (DMI) and they could be easily formed transparent, tough and flexible membranes by solution casting method. The membranes showed good mechanical properties: the tensile strengths and Young’s Modulus were in the range of 68.8–98.6 MPa and 2.1–2.8 GPa, respectively.
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TALANTA
·
2017
·
IF 4.162
Sen Liao,Xinyi Zhao,Fawei Zhu,Miao Chen,Zhiliang Wu,Xiangzhi song,Hua Yang,Xiaoqing Chen
In this work, sulfur and nitrogen co-doped carbon dots (S,N-CQDs) as highly selective fluorescent probe for silver ion (Ag + ) and cysteine (Cys) detection were designed and synthesized directly from citric acid and thiamine hydrochloride via a one-step hydrothermal protocol in 63.8% quantum yield . This probe enabled selective detection of Ag + with a linear range of 0–10 and 10–250 μM and a limit of detection of 0.40 μM with respect to the variation in fluorescence induced by target concentration and electron-transfer from S,N-CQDs to Ag + . Furthermore, S,N-CQDs/Ag + fluorescence can be effectively recovered by virtue of a specific reaction of Cys with silver ion . This fluorescence “turn-on” protocol was applied to determine Cys with two linear ranges of 0–10 and 10–120 μM as well as a detection limit of 0.35 μM. The corresponding cell experiments were also performed, indicating that the prepared S,N-CQDs possessed low cytotoxicity and good biocompatibility. Ultimately, the practicality and viability of this fluorescent probe were demonstrated through the analysis of silver ion in real river water and human serum samples.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Han-Chen Zeng,Peng-Fei Qiu,Zhuo Huang,Xiu-Niang Tan,Zai-Yin Huang,Yan Zhou
The poor electrical conductivity and pronounced structural instability of NiCo Layered Double Hydroxide are of major challenge in energy storage. Herein, three distinct morphological types of S doped nickel cobalt layered double hydroxides, S-LDH-x/NF (x = Ⅰ, Ⅱ and Ⅲ) electrodes are successfully prepared from thiol-functionalized conductive metal organic frameworks NiCo-MOF-x/NF (x = Ⅰ, Ⅱ, Ⅲ) precursors through the synergistic method of in situ interfacial synthesis via coordinated growth and etching. Among them, S-LDH-Ⅱ/NF with nanoflower morphology shows excellent electrochemical performances with high conductivity and remarkable cycling stability, and the surface capacitance is 2617 mF/cm 2 (1 mA/cm 2 ). What's more, the S-LDH-Ⅱ//AC ASC affords a density of energy of 99 Wh/kg (0.182 mWh/cm 2 ) at 415 W/kg (0.76 mW/cm 2 ). In addition, after 10,000 cycling cycles, the S-LDH-Ⅱ//AC ASC still maintains 74 % capacitance retention, indicating its exceptional cycling performance. This paper offers a new approach for designing novel energy storage materials based on thiol-functionalized bimetallic conductive metal organic framework templates through synergistic synthesis method and morphology engineering strategy.
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Water
·
2025
·Vol. 17
·期 21
·3100
·
IF 3
Bingyang Wang,Xiaochen Wang,Shuang Liu,Zheng Wang,Fan Bai,Yujie Cheng,Dingkun Lu,Pengchao Xie
In this study, insoluble CaSO3was applied to replace soluble sulfite/bisulfite salt in the Fe(II)-activated sulfite/bisulfite [S(IV)] process for the efficient 2,4,6-tribromophenol (TBP) degradation. CaSO3serves as a low-cost and slow-release source of S(IV), significantly improving S(IV) utilization compared to conventional soluble Na2SO3. The Fe(II)/CaSO3system generated SO4•−and HO•through Fe(II)/Fe(III) redox cycling. Mechanistic studies confirmed SO4•−as the dominant reactive species, selectively attacking C-Br bonds and hydroxyl groups in TBP. Process optimization revealed effective performance under acidic conditions (pH 3.5–4.0) with minimal inhibition by common anions (Cl−, HCO3−). The reactive sites of TBP were identified through Fukui function calculations, and the degradation pathway was elucidated based on LC-MS analysis. Toxicity evaluation indicated reduced ecological risk of degradation intermediates due to debromination and benzene ring cleavage. This work provides a sustainable strategy for efficient TBP removal and detoxification in wastewater treatment with benefiting S(IV) utilization.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Changqing Liu,Yufei Chen,Tao Wang,Ying Wang,Conghui Liu,Xingang Kong,Jianfeng Huang,Ling Guo,Lixiong Yin
To tackle the pressing dual challenges of the energy crisis and environmental pollution , it is urgent to develop low-cost, high-activity photocatalysts for solar-driven hydrogen production. In this work, a Zn x Cd 1-x S/protonated g-C 3 N 4 S-scheme heterojunction photocatalyst is successfully constructed using an electrostatic interaction-driven assembly strategy. The optimized composite photocatalyst exhibits a hydrogen evolution rate of 17.64 mmol g −1 h −1 , which is approximately 4.14 times and 28.45 times higher than that of pure Zn x Cd 1-x S and protonated g-C 3 N 4 . The apparent quantum efficiency (AQE) of ZCSCN-20 reaches 12.3 % at 420 nm. The electrostatic interaction drives the assembly of the heterojunction, leading to an intimate interfacial contact. This close connection, in turn, significantly shortens the migration distance and transfer time of photogenerated charges. The established S-scheme charge transfer pathway enables the efficient separation of photogenerated charge carriers while preserving the strong redox capability inherent in the constituent semiconductors. Furthermore, the use of sacrificial agents to deplete photogenerated holes further suppresses charge carrier recombination, synergistically enhancing the overall catalytic activity. This work provides an efficient strategy for preparing and optimizing sulfide-based S-scheme heterojunction photocatalysts, laying a foundation for developing stable, high-performance solar-driven hydrogen production systems.
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高影响因子
SOLID STATE SCIENCES
·
2025
·
IF 3.3
Wenyue Zhao,Zipeng Jin,Kunting Li,Huimin Feng,Lei Xu,Yiming Zhang
Efficiently harnessing solar energy for hydrogen production remains a significant challenge, primarily dependent on the rational design of photocatalysts. In this work, an S-scheme heterojunction was constructed by integrating TiO 2 with a biphenyl-bridged covalent triazine framework (CTF-2). The extended π-conjugation in CTF-2 significantly enhances visible-light absorption and generates abundant delocalized electrons. The heterostructure was confirmed by characterizations, which revealed an increased specific surface area and enhanced redox capacity. Photoelectrochemical tests indicated a significant reduction in charge recombination, attributed to the newly formed Ti-N bonds that promote electron transfer from TiO 2 to CTF-2. The active species capture experiment and band structure analysis corroborated the S-scheme charge transfer route. The optimal 1.0 wt% CTF-2/TiO 2 achieved an H 2 evolution rate of 2.975 mmol·g -1 ·h -1 , 4.92 times higher than pristine TiO 2 , and retained 83% of its activity after five cycles. This study provides a practical approach to designing high-performance, stable heterostructures for solar energy conversion.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xianjie Wang,Yufei Wang,Long Yan,Qin Wang,Jian Li,Xiang Zhong,Qianqian Liu,Qingchao Li,Shuo Cui,Gang Xie
Heteroatom-doped porous carbon has attracted enormous attention in fabricating high-performance supercapacitors . However, designing heteroatoms containing carbon materials through an eco-friendly and cost-effective route remains challenging. In this work, N-O-S self-doped porous carbon materials are prepared from semi-coking wastewater-based phenolic resin (SWPR) via a simple Na 2 CO 3 activation strategy. The abundant phenols , NH 4 + , and SO 4 2- in semi-coking wastewater endows the versatile N, O, and S doping in porous carbon material, remarkably enhancing its conductivity. The optimal SWPR-700–2.5 porous carbon material is obtained at an activation temperature of 700 °C and a mass ratio of 2.5:1 for SWPR: Na 2 CO 3 . The symmetrical supercapacitor is assembled with SWPR-700–2.5, exhibiting a high specific capacitance of 170.5 F g −1 at 0.5 A g −1 , with a high energy density of 5.92 Wh kg −1 at 124.9 W kg −1 . After 10,000 cycles, the Coulombic efficiency and capacity retention are 100% and 99.4%, respectively, at a current density of 20 A g −1 . The excellent performance of SWPR-700–2.5 based capacitor is attributed to the porous structure with a large specific surface area (718 m 2 g −1 ) and abundant N-O-S self-doping (2.739 at% N, 8.627 at% O and 1.378 at% S). This study provides a simple route to prepare N-O-S self-doped porous carbon for supercapacitors and pushes forward the advancement of semi-coking wastewater treatment.
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MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 15
·2593-2600
·
IF 3.741
Diao Chun-peng,Yang Xiao,Sun Ai-ling,Liu Ren-min
Vortex-assisted liquid-liquid microextraction (VALLME) for the rapid extraction of trace bisphenol S (BPS) in environmental water is presented. In order to simplify the procedure, an in-house fabricated glass dropper with different internal diameters of the two ends is exploited. The solidification-melt step was cut in VALLME by means of the in-house fabricated glass dropper. After extraction with 2-ethylhexanol, BPS was detected by high performance liquid chromatography (HPLC) with ultraviolet (UV) detection. Factors such as type and volume of extraction solvent, extraction time, sample pH and ionic strength were evaluated. Under optimized conditions, the linearity range varied from 0.10 to 50 μg L −1 with a squared regression coefficient r 2 of 0.9995. The relative standard deviation (RSD) is 2.3 % ( n = 7). The limit of detection (LOD) and limit of quantification (LOQ) are 0.02 and 0.06 μg L −1 , respectively. The presented method was employed for the determination of BPS in real water samples. The relative recoveries are 81.8–87.3 % for the two real water samples. The method is shown to be economical, fast and can be routinely performed.
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