Alexandria Engineering Journal
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2024
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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
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水泥基材料
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纳米复合材料
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建筑材料化学
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界面工程
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BIOORGANIC CHEMISTRY
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2022
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IF 5.307
Hongjun Zhang,Zeguang Cheng,Litian Wei,Xinjun Yu,Zhao Wang,Yinjun Zhang
A gene encoding an esterase from Bacillus aryabhattai (BaCE) was identified, synthesized and efficiently expressed in the Escherichia coli system. A semi-rational protein engineering was applied to further improve the enzyme’s enantioselectivity. Under the guidance of the molecular docking result, a single mutant BaCE-L86Q and a double mutant BaCE-L86Q/G284E were obtained, with its E max value 6.4 times and 13.9 times of the wild-type BaCE, respectively. The recombinant BaCEs were purified and characterized. The overwhelming E value demonstrated that BaCE-L86Q/G284E was a promising biocatalyst for the biological resolution to prepare ( S )-indoline-2-carboxylic acid.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Mengru Du,Wenbo Zhao,Ruonan Ma,Hangbo Xu,Yupan zhu,Chongxin Shan,Kaikai Liu,Jie Zhuang,Zhen Jiao
Waterborne diseases caused by pathogenic microorganisms pose severe threats to human health. ZnO nanoparticles (NPs) hold great potentials as an effective, economical and eco-friendly method for water disinfection , but the exact antimicrobial mechanism of ZnO NPs under visible-light illumination is still not clear. Herein, we investigate the visible-light-driven photocatalytic inactivation mechanism of amino-functionalized hydrophilic ZnO (AH-ZnO) NPs against Staphylococcus aureus ( S. aureus ) in aqueous environment from the perspective of electron transfer theory. The results show that the antibacterial effects of AH-ZnO NPs are dependent on the AH-ZnO NPs concentration and treatment time. The bulk ORP value and released Zn 2+ concentration in AH-ZnO NPs solutions increase with AH-ZnO NPs concentration. The SEM and intracellular protein leakage results indicate that AH-ZnO NPs can adhere to S. aureus surface without causing obvious cell membrane disruption. The photoluminescence (PL) intensity and fluorescence lifetime of AH-ZnO NPs are remarkedly decreased after adding S. aureus , which confirms the electron transfer from S. aureus to AH-ZnO NPs. Moreover, the ΔPL intensity is closely correlated with the inactivation efficiency, demonstrating that the interfacial electron transfer in S. aureus /AH-ZnO NPs composites contributes to the antibacterial activity, which is speculated to disrupt the normal respiratory electron transfer chain of S. aureus , thereby causing intracellular ROS generation, cell membrane depolarization and eventually apoptosis-like death.
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JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Xinyou Zhang,Yutong Yang,Jianxin Wang,Jianjiao Xin,Wendi Wang,Yao Chen,Guangming Yin,Hong Pan
Among various cathode materials, sulfurized polyacrylonitrile (SPAN) is considered a highly promising cathode for Lithium-sulfur (Li-S) batteries due to its unique covalent sulfur fixation mechanism, which fundamentally suppresses polysulfide dissolution and the shuttle effect. However, conventional SPAN materials typically limit sulfur chains to short S 2 -S 4 structures to maintain a solid-solid reaction, restricting their theoretical capacity. Moreover, the material's insulating nature and significant volume changes during cycling greatly limit its electrochemical performance and practicality. To address these issues, this study designed and synthesized a high-elasticity water-based binder based on a 2-ethylhexyl acrylate/acrylic acid/methyl methacrylate (2-EHA-AA-MMA) terpolymer. Abundant carboxyl groups (-COOH) in its molecular chain form stable S-O covalent bonds with sulfur chains in SPAN. Combined with PAN's terminal fixation of sulfur chains, this achieves a synergistic “long-chain capacity enhancement and strong anchoring shuttle suppression” effect. It stabilizes long S 6 chains, improving cycling stability and reversible capacity, while also directing S 6 conversion directly to Li 2 S 3 , bypassing soluble Li 2 S 4 intermediates to suppress shuttle effects at the source. Experimental results show that the SPAN cathode with this binder delivers a high specific capacity of 850.3 mAh g −1 at 0.1 C, with 68.4% capacity retention after 100 cycles and effective polysulfide shuttle suppression.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Tingting Yu,Bing Yang,Rong Zhang,Chenyu Yang,Arramel,Jizhou Jiang
The upsurge of interest in the emergence of photocatalytic fuel cell systems (PFC) presents an efficient and environmentally friendly approach to wastewater treatment. In this work, a Z-scheme coupled with an S-scheme heterojunction electrode was used in the PFC, utilizing TiO 2 /GO/g-C 3 N 4 as the photoanode and BiOAc 1– x Br x /BiOBr as the photocathode. We systematically align the band structures between the anode and cathode, which facilitates the electron transfer between the electrodes. Our attempt successfully demonstrates that collaborative power generation facilitates the high efficiency of tetracycline hydrochloride (TC) degradation at both electrodes. The photoanode achieved a 94.87 % degradation rate for TC, while the photocathode exhibited a 96.33 % degradation rate after 2 h, surpassing pristine BiOBr and BiOAc by factors of ∼5.3 and ∼3.8, respectively. Furthermore, this work proposed a mechanism for electron generation, transport, and pollutant degradation mechanism in the PFC. Intermediate substances generated during the degradation of TC were analyzed through high-performance liquid chromatography-mass spectrometry (HPLC-MS) and ultraviolet photoelectron spectroscopy (UPS), while the optimal degradation pathway was confirmed using density functional theory (DFT). The findings of this work establish the feasibility of efficiently degrading pollutants through PFC treatment, introducing a novel system where various heterojunctions in bipolar materials collaborate with photocatalysis to effectively generate electricity and enhance pollutant removal.
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CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Yan Guo,Bin-Wen Liu,Chao-Hong Xie,Wen-Fa Chen,Ming-Xin Li,Xiao-Ming Jiang,Guo-Cong Guo
Rare-earth infrared nonlinear optical (IR NLO) compounds have garnered significant attention due to their abundant electronic structures. However, their NLO efficiency has been relatively modest, attributed to the localization of valence electron shells in rare-earth metals. Traditional design strategies for IR NLO materials have predominantly focused on MQ4 (M = metal, Q = S or Se) tetrahedra, with limited exploration of MQ6 octahedra. We introduce a novel approach to enhance NLO effects by incorporating distorted mixed anionic octahedral M(S/X)6 groups. To illustrate this strategy, we undertake structure modification and optimization of IR NLO performance using the Y–Ga–Ge–S system as an example. The synthesis of a new rare-earth chalcogenide, Y6Ga2GeS14 (1), serves as a foundation. Further halogen atom substitution yields Y6Ga4.2S13.6Cl3.4 (2), Y6Ga2.83Ge2S16.75Cl (3), and Y6Ga2.83Ge2S16.5Br1.5 (4). All compounds demonstrate remarkable NLO performance, including moderate NLO coefficients (0.17–0.70 × AgGaS2), large laser-induced damage thresholds (LIDTs) (3.78–6.19 × AgGaS2), and a broader transmission range (0.5–14.9 μm). The incremental enhancement of NLO efficiency in compounds 1–4 can be attributed to symmetry breaking induced by halogen atom substitution and increased distortion of the octahedral M(S/X)6 motifs in their structures, validating the effectiveness of our strategy. Notably, this strategy concurrently increases the band gap and LIDT, overcoming the NLO–LIDT incompatibility, being strikingly different from other reported approaches. This work provides new insights into optimizing the NLO performance of rare-earth IR NLO compounds through the modulation of octahedral motifs.
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MACROMOLECULES
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2026
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IF 5.2
Mingsheng Liu,Lian He,Shuanjin Wang,Dongmei Han,Sheng Huang,Min Xiao,Yuezhong Meng
Polythiocarbonates (PTCs) represent a class of polymers derived from polycarbonates. While numerous synthetic methodologies have been reported, their practical applications remain unexplored. This study employs a one-pot bulk polymerization approach using propylene oxide (PO) and carbon disulfide (CS2) to synthesize polythiocarbonates, systematically investigating the effects of reaction temperature and duration on polymer properties. Results demonstrate that optimized reaction conditions fail to suppress O/S exchange, inevitably yielding polymers containing diverse thiocarbonate groups with varying stabilities. Consequently, we established the structural thermal stability hierarchy of thiocarbonate linkages: S(C═O)O > S(C═O)S > O(C═S)O > S(C═S)S > S(C═S)O. Density functional theory (DFT) calculations of bond dissociation energies (BDEs) corroborate this experimentally determined sequence. Our findings identify inherent structural instability as the fundamental barrier to polythiocarbonate applications, providing critical design principles for developing functionally stable PTCs.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Yun Liu,Di Wang,Chunping Li,Yu Wang,Jie Bai
Exploiting the near-infrared (NIR) light which accounts for 50% of solar spectrum for broadband photocatalytic hydrogen evolution is an urgent need for energy crisis. In this work, WO 3 quantum dots (QDs) were decorated on ZnIn 2 S 4 nanoflowers to establish a S-scheme heterojunction. The localized surface plasmon resonance (LSPR) effect of WO 3 QDs not only extends light harvesting into the NIR region but also induces a plasmon-assisted photothermal effect, collectively enabling efficient visible-to-NIR photocatalytic hydrogen evolution. The optimal WO 3 /ZnIn 2 S 4 composite achieves a hydrogen evolution rate of 2920.84 μmol g −1 h −1 , approximately 34.35 and 1.69 times higher than those of pristine WO 3 and ZnIn 2 S 4 , respectively. Moreover, XPS, UV-Vis, and Mott-Schottky analyses confirm the formation of an internal electric field at the WO 3 /ZnIn 2 S 4 interface, which facilitates charge migration and suppresses electron–hole recombination. This work offers an effective strategy for designing highly active photothermal-assisted photocatalysts that respond efficiently to both visible and NIR light.
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Stress Biology
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2026
·Vol. 6
·期 1
·35
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IF 6.4
Xie Yan,Zhao Min,Liu Xianan,Yan Junjie,Yang Wanyi,Chen Yiya,Yang Ming,Wang Xiaowei,Fu Shuai,Zhou Xueping
Cysteine palmitoylation (S-palmitoylation or S-acylation) is a reversible post-translational modification dynamically controlled by opposing enzymes: palmitoyl acyltransferases (PATs) and depalmitoylases. Despite its established roles in other systems, the mechanistic details of S-acylation in plants, particularly its spatiotemporal regulation during plant-virus interactions, remain poorly understood, largely due to the lack of validated enzyme–substrate pairs. Using the geminivirus tomato yellow leaf curl Chuxiong virus (TYLCCxV) as a model, we show that the viral effector C4 undergoes S-palmitoylation at Cys-4, a modification essential for its plasma membrane anchorage and subsequent mediation of viral pathogenesis. NbPAT4, a palmitoyl acyltransferase from Nicotiana benthamiana , catalyzes C4 S-palmitoylation, promoting its membrane localization, protein stability, and viral infection. Conversely, the C4S substitution (C4 C4S ) abolishes S-palmitoylation, leading to cytoplasmic redistribution, protein destabilization, and impaired viral pathogenicity. We further identify NbABHD6 as a depalmitoylase that interacts with C4 and catalyzes its S-depalmitoylation, triggering C4 degradation via the 26S proteasome pathway. This study reveals a regulatory axis in plant-geminivirus interactions, identifying NbPAT4 and NbABHD6 as antagonistic enzymes that dynamically regulate the stoichiometry of C4 S-acylation. These findings support a host–pathogen enzymatic tug-of-war model in which competitive S-palmitoylation homeostasis governs viral subcellular trafficking and pathogenicity.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Yuce Zhang,Chuanmin Ding,Yan Lv,Yanwen Guo,Mengtao Liu,Zekai Ren,Junwen Wang
Thermocatalytic water splitting to produce hydrogen at low temperature was of great significance. In this study, a series of efficient and stable FeO x and FeO x S x catalysts were synthesized via a liquid precipitation method using ferrous sulfate, sodium hydroxide, and thiourea as precursors. The study focused on investigating the effects of sulfur introduction and preparation atmosphere on the catalytic performance. These catalysts were characterized by SEM, XRD, FT-IR, XPS and H 2 -TPR, which confirmed the successful preparation of sulfur-doped catalysts (denoted as FeO x S x -Air and FeO x S x -O 2 ). Under reaction conditions of 350 °C and water vapor (space velocity: 0.3 mL min −1 ), the sulfur-doped catalysts demonstrated superior activity, with FeO x S x -Air and FeO x S x -O 2 achieving H 2 production rates of approximately 0.0523 mmol (mL g) −1 and 0.04092 mmol (mL g) −1 , respectively, outperforming their undoped counterparts (FeO x -Air and FeO x -O 2 ). Meanwhile, FeO x S x -Air with the higher activity was more beneficial for the reaction than FeO x S x -O 2 , which indicated that a lower oxygen partial pressure facilitated the formation of unsaturated Fe coordination environments. The performance enhancement was attributed to the synergistic effect of sulfur doping and low oxygen partial pressure, which optimized the Fe 2+ /Fe 3+ ratio and accelerated the Fe + /Fe 3+ redox cycle, thereby improving charge transfer efficiency and optimizing hydrogen production. These findings highlighted the critical role of sulfur incorporation under low-oxygen conditions in boosting the catalytic activity of iron oxide-based for low-temperature water splitting.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Ziyi An,Suchang Zou,Yi Cai,Bo Xiong,Weilong Shi,Yuzhen Zhao
Citric acid modification reduces red mud alkalinity, enabling effective S-scheme heterojunction with ZnIn₂S₄; • The 4 wt%-ARM/ZIS achieves 2.59 mmol g −1 h −1 H₂ production, 3.28 times higher than pristine ZnIn₂S₄; • Innovative strategy for red mud valorization in sustainable photocatalytic hydrogen production. Hydrogen energy has emerged as a major research focus owing to high combustion heat value, zero carbon emissions, and diverse utilization forms, while photocatalytic hydrogen production, in particular, has attracted considerable interest by virtue of cost-effectiveness and environmental compatibility. Red mud (RM), a large-volume waste from bauxite refining, features a complex composition with harmful and strongly alkaline species that make its disposal costly and environmentally hazardous, thereby demanding urgent and effective treatment solutions. Herein, RM was modified with citric acid to reduce the strong alkalinity of RM, thereby obtaining acid-treated RM (ARM), which is beneficial to be used as reduction photocatalyst and combine with the typical oxidation photocatalyst (ZnIn 2 S 4 , ZIS) to construct the S-scheme heterojunction. The results reveal that the optimal 4 wt%-ARM/ZIS composite achieved the highest photocatalytic hydrogen production rate of 2.59 mmol g −1 h −1 under full-spectrum light irradiation, 3.28 times higher than pure ZIS, demonstrating significant improvement in photocatalytic performance. This work provides innovative approaches and practical solutions for the utilization of RM resources, while also promoting their application in photocatalytic hydrogen production.
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ADVANCED MATERIALS
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2026
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IF 29.1
Fang Li,Peng Zhou,Jinfeng Zhang,Minshu Chen,Quanjun Xiang
Directly switching the type of electron transfer from Type-II to S-scheme at the heterojunction interfaces of a two-component photocatalyst is crucial for improving charge separation efficiency in semiconductor-based photocatalysis technology. A major challenge lies in the effective control of the interfacial band-edge position or electronic properties of a two-component photocatalyst. Here, we constructed a “directional valve” in a Zn x Cd 2-x S 2 –crystalline carbon nitride (Zn x Cd 2-x S 2 –CN) heterojunction through Fermi level modulation to selectively switch Type-II to S-scheme charge transfer. Experimental validation using advanced scanning probe microscopy and in situ photoemission directly observed the switched electron transfer dynamics. The metal probe-assisted in situ X-ray photoelectron spectroscopy (XPS) directly demonstrates the electron transition from Type-II to S-scheme pathways at the interface, corroborated by illumination-induced surface potential shifts. Furthermore, the S-scheme charge transfer in Zn x Cd 2-x S 2 –CN heterojunction contributed to a four times higher CO 2 photoreduction activity than the Type-II one. This study provides a new paradigm for rationally controlling interfacial charge dynamics through band engineering.
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