Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18907-18915
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IF 14.511
Xuefan Zheng,Yuqi Wu,Cheng Li,Jinxue Peng,Wu Yang,Zhongwei Lv,Haoyue Zhong,Zhengliang Gong,Yong Yang
All-solid-state lithium–sulfur batteries (ASSLSBs) are promising candidates for the development of next-generation batteries with high energy density and improved safety. Nevertheless, the sluggish reaction kinetics of the S and Li2S cathode and the low active material content hinder the further development of ASSLSBs. Herein, a Co3O4@nitrogen-doped carbon (Co3O4@NC) nanocomposite is used as an electronically conductive additive to promote the conversion kinetics of S and Li2S in the solid sulfur cathode. With a high sulfur content of 50 wt% and sulfur loading of 4 mg cm−2, ASSLSBs with the S–Co3O4@NC–Li7P3S11 (S–CoNC–LPS) composite cathode exhibit a high specific capacity of 1313 mA h g−1 at 0.2 mA cm−2, as well as a reversible capacity of 1167 mA h g−1 after 100 charge/discharge cycles. Furthermore, the S–CoNC–LPS cathode also demonstrates a high areal capacity of 16.12 mA h cm−2, corresponding to a reversible capacity of 1343 mA h g−1, and good cycling stability even with an ultra-high sulfur loading of 12 mg cm−2. Such a superior electrochemical performance can be attributed to the fact that Co3O4@NC lowers the reaction energy barrier and promotes the interconversion of S and Li2S.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xiaoqin Sun,Tianyu Wang,Xiaoxiang Xu
Heterojunction photocatalysts possess high efficiency in photogenerated electron-hole separation, which give significant advantages in the field of solar hydrogen production . Herein, a novel ZnIn 2 S 4 @S doped g-C 3 N 4 (ZIS@SCN) heterojunction with mesoporous structure was prepared for photocatalytic water splitting under visible light . Characterization showed that the element of S was successfully introduced into g-C 3 N 4 (CN) by replacing N to form C–S–C bonds and significantly enhanced the visible light absorption ability. The constructed heterojunction exhibited excellent photocatalytic hydrogen evolution under visible light. The best performance belonged to the sample of ZIS@100SCN. The corresponding H 2 production rate reached 9.3 mmol h −1 g −1 , which was 1.87-fold higher than that of the undoped one. More importantly, the heterojunction realized overall water splitting of H 2 and O 2 evolution simultaneously with good stability. The mechanism analysis indicted that introducing the element of S could regulate the band structure of CN and induce the charge transfer switching of a ZnIn 2 S 4 @g-C 3 N 4 (ZIS@CN) photocatalyst from Ⅰ-type to S-scheme, which promoted the efficient spatial charge separation and maintained the high redox ability of the ZIS and SCN. This work provides an insight in construction high performance S-scheme heterojunction for water splitting with a doping method.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Jianghui Huang,Fei Wang,Xiang Ma,Lingli Jia,Jiamin Wang,Hongmei Liu,Qingping Wu,Jun Xu
Silicon (Si) anodes undergo severe volume expansion during charging and discharging, resulting in degradation of their electrochemical performance. Polymer binders are one of the most cost-effective ways to suppress the volume expansion of Si particles. In this paper, polyurethane (BFPU) containing conductive cycloalkane, a dynamic S–S bond, and multiple hydrogen bonds is synthesized. After that, polymeric cross-linked network binders with multiple functional bond groups are obtained by cross-linking BFPU and polydopamine (PDA) with metal ions like Zn2+, Fe3+, and Al3+ (PDA-M-BFPU; M = Zn, Fe, Al). The introduction of metal ions, hydrogen bonding, and a dynamic S–S bond network significantly improves the Li+ diffusion rate and mechanical strength, which effectively inhibits the volume expansion of the Si anode. With the addition of metal ions, the initial Coulombic efficiency (ICE) of half-cells increases from 76.5% to over 80%, especially for Si/PDA-Al-BFPU, which reaches 84.5%. Also, the capacity retention rate of Si/PDA-Al-BFPU is 76.8% after 200 cycles at 0.3 C. In addition, the full cell of NCM811//Si/PDA-Al-BFPU shows good cycle stability and rate performance. The robust BFPU binder intensified by hydrogen bonding, a dynamic S–S bond, and metal-ion coordination already exhibits great potential for application in Si anodes.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·
IF 2.7
Xin Wu,Chao Yan,Ying Hu,Junlei Tang,Xiuli Zhao,Mao Chen
Vitrimers are covalently crosslinked networks with dynamic bond exchange, where their dynamic behavior is typically regulated by adjusting network structures or incorporating fillers. This study introduces graphite flakes (GFs) into sulfur-containing. Vitrimers to investigate their effects on mechanical properties, stress relaxation, and thermal conductivity. The results demonstrate that adding 10 wt.% GFs increases tensile strength by 4.37% compared to pure epoxy vitrimer, while higher filler content reduces toughness and decelerates stress relaxation. At 160 °C, the characteristic relaxation time rises from 15.35 s (pure vitrimer) to 108.85 s (40 wt% GFs composite). The Arrhenius prefactor ( τ₀ ) decreases with GFs loading, whereas the activation energy ( E a ) remains nearly unaffected. Additionally, 40 wt.% GFs enhance thermal diffusivity by 110.17% due to oriented phonon transport channels. Chemical recycling via DTT solution achieves complete matrix degradation and filler recovery without damaging GFs. This study provided valuable insights for optimizing vitrimer composites, particularly in enhancing thermal conductivity and modulating dynamic properties.
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RSC Advances
·
2019
·Vol. 9
·期 35
·19973-19982
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IF 3.049
Yusif Mohammed Mukhtar,Kaili Wang,Ran Li,Wenwen Deng,Michael Adu-Frimpong,Huiyun Zhang,Kangyi Zhang,Chenlu Gu,Ximing Xu,Jiangnan Yu
Hepatocellular carcinoma (HC) and glioblastoma (GBA) are the most commonly aggressive malignant liver and brain tumors. Based on an established method for the synthesis of amide, two novel analogues (4 and 5) of (S)-perillic acid were synthesized and their structures were affirmed using nuclear magnetic resonance spectroscopic analysis. An MTT cytotoxic assay showed that our derivatives (4 and 5) demonstrated a substantial anti-proliferative effect against HC (HepG2) and GBA (U251) cell lines. Particularly, compound 5 showed growth inhibitory (IC50) effects on U251 (IC50 = 3.10 ± 0.12 μg mL−1) and HepG2 cells (IC50 = 1.49 ± 0.43 μg mL−1), which fall within the acceptable standard recommended by the National institute of cancer (Bethesda, MD, USA) for the selection of anticancer drug candidates. Consequently, we assessed the in vivo antitumor and organ/tissue toxicity of 4, 5 and 5-fluorouracil (5-FU) in hepatoma H22-inoculated mice. The results obtained indicated remarkable tumor growth inhibition with no substantial toxicological effects on the mice and the organs/tissues in the treated groups compared well with the control.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Kai Wei,Jiasheng Zhu,Lufang Fan,Weijie Zhang,Huarui Han,Changchang Ma,Kan Hu,Sheng Feng
Here, we constructed S-scheme CdIn 2 S 4 /MoO 3-x (CISMO) photothermal catalyst with interface Mo-S bond for efficient overall water splitting. As expected, hydrogen (H 2 ) and oxygen (O 2 ) evolution rates of the optimized CISMO reached 554.71 and 277.88 μmol·g −1 ·h −1 , respectively, far higher than that of CdIn 2 S 4 (71.78 and 34.45 μmol·g −1 ·h −1 ) and MoO 3-x (0 and 21.83 μmol·g −1 ·h −1 ). Mechanism analysis revealed that the photogenerated carrier transfer followed an S-scheme route. More importantly, the photocatalytic performance of CdIn 2 S 4 /MoO 3-x was highly relevant with the oxygen vacancies (Ovs) in pristine MoO 3-x . In S-rich environment, the Ovs could be imbedded by sulfur (S) for the formation of interface Mo-S bond during CISMO fabrication. Interface Mo-S bridge facilitated the photogenerated carriers transfer between CdIn 2 S 4 and MoO 3-x . Moreover, the metal-free localized surface plasmon resonance effect, originating from the residual Ovs in CdIn 2 S 4 /MoO 3-x , could further enhance the water splitting performance through photothermal conversion. This work shed light on controllable interface chemical bond formation in heterojunction photocatalysts to signally promote the photocatalytic performance.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
·
IF 6.2
Qin Hong,Di Liu,Linbo Gou,Shengfang Wu,Xiuwen Zhou,Tai-Ping Fan,Long Wang,Yujie Cai
Limonene is a vital monoterpenoid with wide applications in food, medicine, cosmetics, and other fields. Microbial limonene production is a green and sustainable strategy, but its yield is limited by product toxicity and the low terpene synthase activity. In this study, using Serratia. marcescens HBQA7 ΔslaAB-pyc as the chassis strain, we first screened the most active (S)-limonene synthase from Mentha spicata among five plant-derived ones. Then, to further improve its activity, we rationally engineered its active site and enhanced its expression via a bicistronic structure. Finally, 4.5 g/L (S)-limonene was achieved in shake flasks with glycerol as the carbon source after 72 h. In a 5 L bioreactor, production reached 22.8 g/L within 100 h, representing the highest microbial (S)-limonene yield reported to date.
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PubMed
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Bioresources and Bioprocessing
·
2022
·Vol. 9
·期 1
·1-14
·
IF 4.983
Hu Qiongyue,Zhang Tanglei,Yu Hongwei,Ye Lidan
The vitamin A component retinol has become an increasingly sought-after cosmetic ingredient. In previous efforts for microbial biosynthesis of vitamin A, a mixture of retinoids was produced. In order to efficiently produce retinol at high purity, the precursor and NADPH supply was first enhanced to improve retinoids accumulation in the S. cerevisiae strain constructed from a β-carotene producer by introducing β-carotene 15,15ʹ-dioxygenase, following by screening of heterologous and endogenous oxidoreductases for retinal reduction. Env9 was found as an endogenous retinal reductase and its activity was verified in vitro. By co-expressing Env9 with the E. coli ybbO , as much as 443.43 mg/L of retinol was produced at 98.76% purity in bi-phasic shake-flask culture when the antioxidant butylated hydroxytoluene was added to prevent retinoids degradation. The retinol titer reached 2479.34 mg/L in fed-batch fermentation. The success in selective biosynthesis of retinol would lay a solid foundation for its biotechnological production. Graphical Abstract
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PubMed
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Polymer Chemistry
·
2022
·Vol. 13
·期 10
·1328-1334
·
IF 5.364
Lihua Zhao,Tianhao Li,Bijie Wang,Ke Chen,Xiao Hu,Ming Liu,Liu He,Qing Huang,Yujie Song
Poly(siloxane–carborane)s are a class of polymeric materials which can be used for harsh environments. Poly(cyclosiloxane–carborane)s were prepared through the hydrosilylation of cyclosiloxanes and vinyl modified carboranes. The structure of the as-prepared carborane cyclosiloxane hybrid polymers (CcHPs) could be controlled through changing the ratio of monomers, and the CcHPs showed good thermal stability as well as anti-oxidation properties. The carbon fiber coated with CcHPs could resist high temperature in air, and only 10 wt% loss was observed at 1000 °C. The coated carbon foam could retain its shape and size after burning for 2 min, demonstrating the potential applications of CcHPs as protective coatings for harsh environments.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Danyang Liu,Miaomiao Jing,Qiang Zhao,Junli Wang,Zhifang Jia,Zuopeng Li,Kewei Wang,Yong Guo,Yuanzhen Ke
A novel S-scheme heterojunction N,S-NiFe-LDH/N-Bi₂MoO₆ was successfully constructed. • 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ showed the highest activity, degrading 86.3% of TC in 100 min under visible light. • Element doping and interface engineering synergistically enhanced visible-light absorption and charge separation. • ·OH and ·O₂ − were the dominant active species responsible for TC degradation. A step-scheme (S-scheme) heterojunction photocatalyst was constructed via a hydrothermal method, consisting of N,S co-doped NiFe layered double hydroxide (N,S-NiFe-LDH) and nitrogen-doped bismuth molybdate (N-Bi₂MoO₆). The morphology, crystal structure, optical properties, elemental valence states, and charge separation/transport performance of the composite catalyst were systematically investigated using various characterization techniques, including SEM, TEM, HRTEM, XRD, UV–Vis DRS, XPS, and EIS. Its photocatalytic activity was evaluated through tetracycline (TC) degradation experiments under visible light irradiation, and the catalytic mechanism was elucidated by EPR radical detection. The results showed that the incorporation of N,S-NiFe-LDH enhanced the photocatalytic performance of the composite catalyst. Among the tested samples, the 5 wt% N,S-NiFe-LDH/N-Bi₂MoO₆ composite exhibited the highest degradation efficiency, achieving 86.3% TC removal within 100 min. The synergistic interaction between N,S-NiFe-LDH and N-Bi₂MoO₆ promoted the separation efficiency of electrons and holes, thereby significantly enhancing the photocatalytic activity.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yuanyuan Wang,Yin Zhang,Yuxin Zhang,Xinchen Li,Yancheng Gong,Yingfei Hu,Hangmin Guan
This research details the synthesis of an Ag/Ag₂S/ZnIn₂S₄ composite photocatalyst via the in-situ reduction of Ag/Ag₂S onto a flower-like ZnIn₂S₄ structure. The optimized 2%Ag/Ag₂S/ZnIn₂S₄ material displays augmented visible-light absorption spanning 500–800 nm, a photocurrent density 3.9-fold higher than pristine ZnIn₂S₄, and a more negative flat-band potential of −1.04 V versus Ag/AgCl. This composite achieves over 99% degradation of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) within 15 min (k = 0.2629 min −1 ) and 98.9% degradation of hexachlorobenzene (HCB) within 100 min (k = 0.0408 min −1 ), representing a degradation rate approximately 40 times faster than pure ZnIn₂S₄. To our knowledge, this is the fastest reported case to date of a visible-light-driven reductive dehalogenation reaction involving BDE-47 under similarly mild conditions, and its performance significantly outperforms that of ZnIn₂S₄ modified with Pd, Au, or Cu. Photogenerated electron-mediated mechanisms are confirmed through trapping experiments, and the catalyst exhibits robust stability across five reaction cycles. The accelerated degradation of BDE-47 is ascribed to its lower C Br bond energy (285 kJ/mol) compared to C Cl (327 kJ/mol) and enhanced hydrophobic adsorption. This study introduces a triple-synergy heterojunction approach for achieving ultrafast visible-light-driven reductive dehalogenation of halogenated persistent organic pollutants.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Chao-Ying Fan,Pin Xiao,Huan-Huan Li,Hai-Feng Wang,Lin-Lin Zhang,Hai-Zhu Sun,Xing-Long Wu,Hai-Ming Xie,Jing-Ping Zhang
In this work, the chemical interaction of cathode and lithium polysulfides (LiPSs), which is a more targeted approach for completely preventing the shuttle of LiPSs in lithium–sulfur (Li–S) batteries, has been established on the electrode level. Through simply posttreating the ordinary sulfur cathode in atmospheric environment just for several minutes, the Au nanoparticles (Au NPs) were well-decorated on/in the surface and pores of the electrode composed of commercial acetylene black (CB) and sulfur powder. The Au NPs can covalently stabilize the sulfur/LiPSs, which is advantageous for restricting the shuttle effect. Moreover, the LiPSs reservoirs of Au NPs with high conductivity can significantly control the deposition of the trapped LiPSs, contributing to the uniform distribution of sulfur species upon charging/discharging. The slight modification of the cathode with <3 wt % Au NPs has favorably prospered the cycle capacity and stability of Li–S batteries. Moreover, this cathode exhibited an excellent anti-self-discharge ability. The slight decoration for the ordinary electrode, which can be easily accessed in the industrial process, provides a facile strategy for improving the performance of commercial carbon-based Li–S batteries toward practical application.
研究领域:
储能技术
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纳米材料
·
电化学
·
电池技术
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