ACS Nano
·
2024
·
IF 15.8
Haijian Huang,Hao Feng,Ziyu He,Yanan Huang,Jiawei Xu,Chengzhi Hu,Zhangxian Chen,Zeheng Yang,Weixin Zhang
Enhancing proton storage in the zinc-ion battery cathode material of MnO2 holds promise in promoting its electrochemical performance by mitigating the intense Coulombic interaction between divalent zinc ions and the host structure. However, challenges persist in addressing the structural instability caused by Jahn–Teller effects and accurately modulating H+ intercalation in MnO2. Herein, the doping of high-electronegativity Sb with fully occupied d-orbital in MnO2 is reported. The Sb doping strategy engenders the formation of Mn–O–Sb path in the structure with a strong dipole polarization field, which facilitates the delocalization of eg orbital electron in Mn and thus mitigates the Jahn–Teller effects. Simultaneously, adjusting the level of Sb doping in MnO2 leads to modulation of the p-band center of O, optimizing its interaction with hydrogen and thereby enhancing proton storage. Consequently, MnO2 doped with 6% Sb exhibits commendable performance in both rate capability and cycling endurance, delivering 113 mAh g–1 at 2 A g–1 after 2000 cycles. This investigation underscores the crucial role of electronic structural engineering in elevating the electrochemical performance of cathode materials for zinc-ion batteries.
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Zhen Huang,Shimin Geng,Yizhen Chen,Ying Li,Mingen Fei,Renhui Qiu,Tingting Chen,Wendi Liu
Traditional polyurethane hot-melt adhesives often fall short in achieving high bonding strength and recyclability, and their dependence on non-renewable resources poses a significant hurdle for sustainable development. In this study, a palm oil-based diethanolamide (POEA) containing a long aliphatic chain was synthesized to develop comb thermoplastic polyurethane hot-melt adhesives (POPUs) with high biobased content, superior adhesion strength, and reusability. The microphase separation structure of POPUs was manipulated through the incorporation of dangling fatty acid chains and hydrogen bonds, resulting in the adhesives with excellent mechanical properties, with an optimum tensile strength of 5.37 MPa and an elongation at break of 282 %. As a hot-melt adhesive, it achieved a maximum lap-shear strength of 7.34 MPa on steel and maintained an average strength of 95 % of its initial value across multiple bonding cycles. Moreover, its lap-shear strengths with wood and glass remained at 6.57 MPa and 3.57 MPa respectively, fully meeting the requirements for interior decoration. Additionally, it was unexpectedly discovered that the adhesives possessed fluorescence characteristics, which can be applied in fields such as cultural relic restoration and anti-counterfeiting.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Kaiming Yang,Feifei Wang,Bingrui Shi,Zhenlong Zhang,Weixu Feng,Guoquan Qi,Hongxia Yan
Developing low-temperature curing and high-performance self-lubricating anticorrosion coatings is a challenge for solving energy waste and environmental problems caused by wear and corrosion. Herein, molybdenum disulfide/hexagonal boron nitride (MoS 2 /h-BN) heterojunction particles, prepared by an inexpensive, efficient and solvent-free ultrasonic-assisted ball milling method, are used as solid lubricants and corrosive media barrier. Meanwhile, hyperbranched polysiloxane with terminal epoxy groups (HSiEp) is utilized to improve both the dispersion of the particles and the interfacial bonding strength between the particles and the epoxy binder. Compared with neat epoxy coating, the average friction coefficient of 45.0 wt% MoS 2 /h-BN/6.0 wt% HSiEp/EP coating decreases from 0.38 to 0.19, while the coating resistance (R 1 ) increases from 9.98 × 10 5 Ω·cm 2 to 3.33 × 10 6 Ω·cm 2 . This is mainly attributed to the “soft-hard” particle synergy and the high barrier synergy of HSiEp and MoS 2 /h-BN heterojunction particles. This study provides a theoretical foundation for the development of low-energy-consumption and high-performance epoxy self-lubricating anticorrosion coatings.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Yu Su,Rong Fan,Jiabao Li,Yangxi Liu,Ziyuan Zheng,Xin Zhou,Xiang Feng,Yibin Liu,Hui Zhao,Xiaobo Chen,Xingong Zhang,Chaohe Yang,Hao Yan
Oxidation of fatty alcohols to fatty acids is still challenging due to the sluggish activation of the C–H bond over Au supported on reducible oxides with a coordination-saturated structure. Herein, we constructed an efficient interfacial Auδ−–OV–Ti structure by tuning the crystal forms of TiO2. Compared with TiO2-rutile exposed by (110) and (111) crystal facets, TiO2-anatase can exploit the defect (101) crystal facet to obtain rich oxygen vacancies (OV), inducing electron migration from TiO2-anatase support to Au species to form electron-rich Auδ− species. Specifically, the synergistic catalytic effect between the OV–Ti and Auδ− species greatly enhances the adsorption of alcohol and thereby overcomes sluggish activation of the C–H bond caused by the electron pushing effect triggered by long carbon chains. Consequently, the Au/TiO2-anatase catalyst shows excellent isooctyl alcohol conversion (69.5%) and isocaprylic acid selectivity (67.9%) under base-free conditions. The catalytic system is further extended to the oxidation of other fatty alcohols to fatty acids with excellent catalytic performance.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Changzhou Chen,Peng Liu,Haihong Xia,Jianchun Jiang,Xiaohui Yang,Minghao Zhou
Lignin is an abundant source of aromatics with low effective hydrogen-to-carbon ratio (H/Ceff), and the depolymerization of lignin provides significant potential for producing liquid products with an improved H/Ceff value. In this work, the catalytic conversion of lignin monomers, dimer, trimers, and realistic lignin over spherical MOF-derived NiMo@C catalysts was well established, to get liquid fuels with a higher H/Ceff. The optimal ratio of the Ni4Mo1@C catalyst exhibited good hydrodeoxygenation activity and stability for the hydrotreatment of lignin model compounds and lignin. The addition of Mo facilitated the decrease of the particle size of a spherical structure, strengthened the electron-transfer capability between metals Mo and Ni, and enhanced the acid strength. All of these factors contributed to higher hydrodeoxygenation activity in the hydrotreatment process. Up to 100% conversion and 90% yields of ethylcyclohexane and cyclohexanol with H/Ceff values of 2.0 and 1.667, respectively, were obtained. The Ni4Mo1@C catalyst achieved a decrease of the oxygen element and an increase of H/Ceff and HHV values. The physicochemical characterizations were performed by various means including X-ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electron microscopy (TEM), H2-temperature-programmed reduction (H2-TPR), NH3-temperature-programmed desorption (NH3-TPD), pyridine-infrared spectroscopy (Py-IR), inductively coupled plasma emission spectrometer (ICP), and Raman and X-ray photoelectron spectroscopy (XPS) analyses, which definitely elucidated the formation of a synergistic effect between metals Mo and Ni. Additionally, a control experiment also illustrated the synergistic effect that facilitated the occurrence of the hydrotreatment process under lower temperatures after the addition of metal Mo. Based on the optimal reaction condition (240 °C, 4 h, 2.0 MPa H2), both lignin and its monomers/dimers/trimers could be effectively hydrotreated to afford liquid products with improved H/Ceff value compared to raw lignin.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Chunli Zhang,Yi He,Fei Li,Haihui Di,Lei Zhang,Yingqing Zhan
A novel hybrid materials Fe 3 O 4 nanoparticles supported by hexagonal boron nitride (h-BN) is successfully prepared via mussel-inspired chemistry of dopamine by hydrothermal synthesis method. The surface modification and microstructure of h-BN-Fe 3 O 4 are characterized by FT-IR, XRD , XPS, SEM and TEM . The nano-Fe 3 O 4 obtain well dispersion supported by h-BN layer platform, and the h-BN-Fe 3 O 4 hybrid materials exhibit a remarkable superiority in enhancing the anticorrosion performance of epoxy coatings. The lamellar structural h-BN and nano-Fe 3 O 4 provide a significant synergistic effect in anticorrosion performance for epoxy composite coatings . In addition, the anticorrosion mechanisms of h-BN-Fe 3 O 4 are tentatively discussed.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Rui Ding,Wenjuan Zhang,Shiva Pandeya,Xueqing Zhu,Kai Xu,Meixing Gui,Hongbing Wang,Ziliang Li,Qianqian Shang,Mahesh Kumar Joshi
The design of a double Z-type heterojunction represents a promising strategy in photocatalysis to achieve superior charge carrier separation, increased light-harvesting capability, and consequently, a higher photocatalytic reaction rate. Herein, a novel ternary heterojunction with direct dual Z-scheme configuration, g-C3N4/In2S3/In2O3 photocatalyst, was synthesized using a chemical bath and facile calcination process. The XRD, SEM-EDS and XPS results confirmed the successful integration of g-C3N4, In2S3, and In2O3 with preserved crystalline phases. Photocatalytic performances of the ternary composite were evaluated via two effective routes, such as methyl orange (MO) degradation and hydrogen (H2) generation, benchmarked against the pristine g-C3N4 and the g-C3N4/In2S3 and In2S3/In2O3 binary composite, revealing that the in-situ growth of In2O3 onto the g-C3N4/In2S3 composite contributed to the remarkable enhancement of their photocatalytic activity. The photodegradation process follows the pseudo-first order reaction kinetics. The ternary g-C3N4/In2O3/In2S3 heterojunction exhibited 94.8% degradation efficiency of MO with a corresponding rate of 23.4×10-3 min-1, 4.8 times higher than the pristine g-C3N4, and excellent photocatalytic activity in five consecutive cycles. Similarly, the g-C3N4/In2S3/In2O3 heterojunction exhibited a rate constant of ~2.4 mmol h−1 g−1 for H2 generation. This superior enhancement was attributed to the dual Z-scheme charge transfer mechanism. The formation of direct dual Z-scheme heterojunction improved the light harvesting, minimized electron hole recombination, and efficiently facilitated the separation of charge carriers. This work provided a mechanistic insight for engineering multifunctional heterojunction for environmental remediation and pollutant mitigation.
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高影响因子
International Journal of Biological Sciences
·
2022
·
IF 10.75
Yu Dong,Guoyuan Zhu,Sheng-Fang Wang,Kristine A. Keon,John L. Rubinstein,Si-Xin Zeng,Shuang Zhang,Qiu-Ling Chen,Jing Fu,Min Li,Han-Ming Shen,Jin-Jian Lu,Xiu-Ping Chen,Jia-Hong Lu
Macroautophagy/autophagy is the process of self-digestion through the lysosomes; it disassembles unnecessary or dysfunctional long-lived proteins and damaged organelles for the recycling of biomacromolecules. Unfortunately, cancer cells can hijack this mechanism to survive under metabolic stress or develop drug resistance during chemotherapy. Increasing evidence indicates that the combination of autophagy inhibition and chemotherapy is a promising cancer treatment strategy. However, effective autophagy inhibitors with satisfied potency, bioavailability, and clearly-defined drug targets are still rare. Here, we report the identification of a potent autophagy inhibitor toosendanin which can effectively block autophagosome maturation, causing the accumulation of autophagy substrates in multiple cancer cells. Toosendanin did not inhibit the fusion process between autophagosome and lysosome but elevated lysosomal pH and impaired lysosomal enzymes activity. Using rat liver lysosome fraction and purified yeast V-ATPase, we found that toosendanin directly inhibited V-ATPase activity. By applying cellular thermal shift assay (CETSA), immunoprecipitation-coupled LC-MS/MS analysis, and biotin-toosendanin pull-down assay, we confirmed the direct binding between toosendanin and V-ATPase. Furthermore, toosendanin blocked chemotherapy-induced protective autophagy in cultured cancer cells and xenograft tumor tissues to significantly enhance anti-cancer activity. These results suggest that toosendanin has the potential to be developed into an anti-cancer drug by blocking chemotherapy-induced protective autophagy.
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Shanshan Ding,Danjun Mao,Shaogui Yang,Fei Wang,Lingjun Meng,Mengshu Han,Huan He,Cheng Sun,Bin Xu
The novel boron nitride coupled Bi-rich Bi 4 O 5 Br 2 layered microspheres (h-BN/Bi 4 O 5 Br 2 -LMs) were successfully synthesized via a facile ionic liquid-in-water (IL/W) microemulsion-mediated route. The physical, chemical and optical properties of these heterojunction photocatalysts were thoroughly characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and UV–vis diffuse reflection spectroscopy (DRS). Their photocatalytic activities were primarily evaluated by degradation of 4- tert -butylphenol (PTBP), which found 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs to be the best one. The photocurrent experiments showed that the photocurrent density of 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs was four times higher than that of pure Bi 4 O 5 Br 2 -LMs due to enhanced charge transfer ability of the former. It revealed that the addition of h-BN was in favor of suppressing the photoinduced electron-hole pair recombination of Bi 4 O 5 Br 2 -LMs, so as to improve the photocatalytic activity of the composite. O 2 − and h + were proved to be the main reactive species in the photocatalytic process by scavenger experiments and electron paramagnetic resonance (EPR) spectra. In addition, the photocatalytic mechanism of h-BN/Bi 4 O 5 Br 2 -LMs was further elaborated in this work. The probable degradation products were identified by GC–MS. The proposed conjugated addition and oxidation reactions were described to be the main pathways by combining the frontier electron density calculation and GC–MS results.
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高影响因子
Alexandria Engineering Journal
·
2024
·
IF 6.2
Hong Zhang,Ming Chen,Tiantian Liang,Zanpeng Zhang,Changhui Yang
The use of nanocarbon materials to enhance the toughness of fragile cementitious materials has attracted increasing attention for investigation. This study examines the effects of incorporating graphene oxide (GO) into NaOH-activated slag (AAS) pastes and mortars, focusing on workability, phase composition, mechanical properties, and the local mechanical properties of the interfacial transition zone (ITZ) between sand and paste. The experimental results indicate that the addition of GO decreases the flowability of NaOH-AAS pastes, with noticeable aggregation at concentrations above 0.03 wt%. Furthermore, GO enhances the hydration degree of ground granulated blast furnace slag (GGBS), leading to an increased amount of C-A-S-H gel without introducing new phases. In terms of macro performance, incorporating 0.03 wt% GO significantly improves the compressive and flexural strengths of NaOH-AAS mortars by 10.6 % and 17.9 %, respectively. Additionally, the presence of GO reduces the ITZ thickness from 30 to 15 micrometres in NaOH-AAS mortars, which likely contributes to the enhanced mechanical performance.
研究领域:
材料科学
·
水泥基材料
·
纳米复合材料
·
建筑材料化学
·
界面工程
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高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2013
·Vol. 31
·期 3
·371-376
·
IF 0.917
Wei Zhu,Haoyang Wang,Haihui Peng,Guosheng Liu,Yinlong Guo
Pd-catalyzed oxidative coupling reaction was of great importance in the aromatic C H activation and the formation of new C O and C C bonds. Sanford has pioneered practical, directed C H activation reactions employing Pd(OAc) 2 as catalyst since 2004. However, until now, the speculated reactive Pd(IV) transient intermediates in these reactions have not been isolated or directly detected from reaction solution. Electrospray ionization tandem mass spectrometry (ESI-MS/MS) was used to intercept and characterize the reactive Pd(IV) transient intermediates in the solutions of Pd(OAc) 2 -catalyzed oxidative coupling reactions. In this study, the Pd(IV) transient intermediates were detected from the solution of Pd(OAc) 2 -catalyzed oxidative coupling reactions by ESI-MS and the MS/MS of the intercepted Pd(IV) transient intermediate in reaction system was the same with the synthesized authentic Pd(IV) complex. Our ESI-MS(/MS) studies confirmed the presence of Pd(IV) reaction transient intermediates. Most interestingly, the MS/MS of Pd(IV) transient intermediates showed the reductive elimination reactivity to Pd(II) complexes with new C O bond formation into product in gas phase, which was consistent with the proposed reactivity of the Pd(IV) transient intermediates in solution.
研究领域:
有机化学
·
金属有机化学
·
分析化学
·
催化化学
·
质谱学
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Zhengang Zhou,Kai Feng,Xiuqi Hu,Chengjin Pan,Junjie Zheng,Lingyu Shao,Funing Wang,Xiao Zhang,Yang Zhang,Xiaojiang Li,Shihan Zhang,Chenghang Zheng,Xiang Gao
Amine-solvent degradation stands as a key bottleneck hindering the large-scale application of post-combustion CO2 capture, motivating the development of more chemically stable solvent chemistries. High-resolution mass spectrometry and density functional theory were combined to identify degradation pathways and quantify hydrogen-abstraction barriers. Sterically hindered and cyclic amines suppress hydrogen abstraction and downstream oxidation. Solvent degradation was evaluated in high-pressure autoclave reactors under simulated industrial flue-gas conditions representative of coal-fired power plants, with CO2 concentrations of about 10−15 vol %, O2 at several volume percent, and temperatures relevant to absorber−stripper operation and solvent circulation. Compared with conventional monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP) reduced degradation rates by 25−60%, attributable to steric hindrance that suppresses carbon-chain hydrogen abstraction. Under all tested operating conditions, a mixed solvent system comprising N-aminoethylpiperazine (AEP) and AMP demonstrated markedly stronger antidegradation capability than MEA. Antioxidants mitigated oxidative degradation, whereas Fe2+ accelerated it; chelating agents suppressed Fe2+-catalyzed oxidation by limiting peroxyradical formation. Structure−stability relationships and targeted additive design guided multifactor optimization of the absorbent formulation, improving stability by 71.6% under accelerated degradation tests and supporting long-term, oxygen-tolerant operation.
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高影响因子
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