APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Yuan Fang,Shiyu Ji,Xin Wu,Jianfeng Zhu
Passive direct liquid fuel cells are promising power generation devices with the advantages of convenient transportation, storage for liquid fuel and high power density. This paper focuses on improving the intrinsic electrocatalytic performance and durability of nitrogen-doped carbon (N-C) cathodic electrocatalysts. Then, lamellar structured Ce-S-NC heterogeneous electrocatalyst was synthesized and used as a highly durable cathode for two types of passive direct liquid fuel cells, i.e. , direct methanol fuel cells (DMFCs) and direct borohydride fuel cells (DBFCs). In this work, the effect of the S/C molar ratio on the microstructure and electrocatalytic performance of the Ce-S-NC electrocatalysts was investigated, and excellent intrinsic oxygen reduction reaction activity was obtained at an S/C molar ratio of 0.15. The peak power densities of Ce-S-NC based DMFCs reached up to 12.5, 23.6 and 41.9 mW·cm −2 at 20, 40 and 60 °C, respectively. The peak power densities of 59.3, 84.6 and 132.6 mW·cm −2 were obtained in Ce-S-NC based DBFCs at 20, 40 and 60 °C, respectively. In the durability tests, both the Ce-S-NC based air-breathing DBFCs and passive DBFCs showed the stable operation than that of N-C and Ce-NC. When the current density increased from 50 to 150 mA·cm −2 , the Ce-S-NC based DBFC can be operated for 882 h, and only 34 and 91 h for that of N-C and Ce-NC. The electrochemical impedance spectroscopy tests proved Ce-S-NC based DBFC showed the faster mass transfer efficiency. The outstanding durability of Ce-S-NC is mainly attributed to the improved defect density and mass transfer.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 66
·37631-37642
·
IF 2.936
Haiyang Wu,Rong Hu,Birong Zeng,Li Yang,Ting Chen,Wei Zheng,Xinyu Liu,Weiang Luo,Lizong Dai
In order to develop new phosphorus–nitrogen-containing flame retardants, three novel compounds of DOPO-substituted aminophenyl-s-triazine (TAT-DOPO) with different P/N element ratios were synthesized by Kabachnik–Fields reaction. TAT-triDOPO possessing three DOPO units in one molecule exhibited the best thermal stability. Besides, TAT-triDOPO and TAT-hexaDOPO possessing active hydrogen displayed the characteristics of reactive-type retardant, while TAT-enneaDOPO without active hydrogen represented additive-type retardant. The influences of three TAT-DOPO compounds on the thermal stability, flame retardancy and mechanical properties of the cured EP composites were investigated. Compared with pure EP, the char yields of EP/TAT-DOPO were increased. The LOI value and the UL-94 ratings of EP/TAT-triDOPO with a 5% loading were improved to 34.0% and V-0 grade. The PHRR, THR and HRC of EP/TAT-triDOPO were decreased by 25.7%, 21.1% and 25.4%, respectively. Furthermore, the incorporation of TAT-triDOPO could also improve the flexural strength and elastic modulus of cured EP. It was explained that the existence of active hydrogen atoms within TAT-triDOPO molecule can act as effective chemical cross-linking points in EP network. Finally, based on the SEM and TGA-FTIR analysis of pyrolytic products of cured EP/TAT-DOPO, it was deduced that the prepared TAT-DOPO flame retardant could exhibit both condensed phase and gas phase flame-retardancy mechanism.
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ORGANIC PROCESS RESEARCH & DEVELOPMENT
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2024
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IF 3.1
Chao-Ping Lin,Chen-Hui Xu,Fan-Yu Meng,Shi-Ping Song,Zhe-Ming Wu,Ren-Chao Zheng,Yu-Guo Zheng
A chemoenzymatic process combing nitrilase-catalyzed hydrolysis and continuous flow racemization was developed for highly efficient manufacturing of (S)-pregabalin. Nitrilase was immobilized on epoxy resin and employed for the biosynthesis of (S)-3-cyano-5-methylhexanoic acid ((S)-CMHA), the precursor of (S)-pregabalin. Isobutylsuccinonitrile (IBSN) (700 mM) was converted to (S)-CMHA with a conversion of 45.3% and ee of 99.5%. Meanwhile, the unreacted (R)-IBSN was continuously racemized by the γ-alumina-based solid base catalysts (ASBCs) in a packed bed reactor, and an outstanding space-time yield of 6.76 mol L–1 day–1 was achieved. Moreover, the ASBCs exhibited excellent operational stability in the racemization system and retained 85.9% catalytic activity after 20 days of continuous racemization operation. (S)-CMHA was subsequently separated and purified by a membrane separation system in 95% yield and was hydrogenated in one step to (S)-pregabalin in a yield of 88%. These obtained results exhibited the efficiency of the chemoenzymatic process and the great potential for industrialization of (S)-pregabalin.
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高影响因子
ACS Nano
·
2021
·
IF 15.881
Ting Huang,Yingjie Sun,Jianghua Wu,Jia Jin,Chaohui Wei,Zixiong Shi,Menglei Wang,Jingsheng Cai,Xing-Tao An,Peng Wang,Chenliang Su,Ya-yun Li,Jingyu Sun
Although lithium–sulfur (Li–S) batteries have long been touted as next-generation energy storage devices, the rampant dendrite growth at the anode side and sluggish redox kinetics at the cathode side drastically impede their practical application. Herein, a dual-functional fibrous skeleton implanted with single-atom Co–Nx dispersion is devised as an advanced modificator to realize concurrent regulation of both electrodes. The rational integration of single-atomic Co–Nx sites could convert the fibrous carbon skeleton from lithiophobic to lithiophilic, helping assuage the dendritic formation for the Li anode. Meanwhile, the favorable electrocatalytic activity from the Co–Nx species affording a lightweight feature effectively enables expedited bidirectional conversion kinetics of sulfur electrochemistry, thereby inhibiting the polysulfide shuttle. Moreover, the interconnected porous framework endows the entire skeleton with good mechanical robustness and fast electron/ion transportation. Benefiting from the synergistic effects between atomically dispersed Co–Nx sites and three-dimensional conductive networks, the integrated Li–S full batteries can achieve a reversible areal capacity (>7.0 mAh cm–2) at a sulfur loading of 6.9 mg cm–2. This work might be beneficial to the development of practically viable Li–S batteries harnessing single-atom mediators.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yumeng Lian,Yi Wang,Dun Zhang,Likun Xu
Developing a stable and reusable material for antibacterial application in an enzyme-like system is still a challenge. Herein, Mn–Co–S–Se (MnCo 2 S x Se 4–x )/Ni foam (NF) are synthesized by introducing S 2– and Se 2– in MnCo 2 O 4 /NF with a facile hydrothermal approach. With the different molar ratios of S/Se, the surface morphology of MnCo 2 S x Se 4–x /NF shows different growth and the catalytic activity also presents regular changes. MnCo 2 S 3.1 Se 0.9 /NF possesses a high enzyme-like ability with higher V max than natural horseradish peroxidase . Due to the outstanding peroxidase-like activity, MnCo 2 S 3.1 Se 0.9 /NF also exhibits broad-spectrum bactericidal performance towards Escherichia coli and Staphylococcus aureus which stems from the formation of ·O 2 – from H 2 O 2 . In the reutilization experiment, the enzyme-like activity keeps a stable value after 25 cyclic tests and the bactericidal performance is still stable after 10 cyclic tests, proving that MnCo 2 S 3.1 Se 0.9 /NF possesses relative stability and reusability. This research showed the great prospect of new energy and environmental catalysis.
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MOLECULAR & CELLULAR PROTEOMICS
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2025
·
IF 5.5
Yanyan Yi,Xiahe Huang,Wan Wang,Yingchun Wang,Jianru Zuo,Hongyan Guo
Nitric oxide (NO) is a crucial signaling molecule involved in various developmental processes and stress responses through post-translational protein modification and modulation of gene expression. Despite significant advances in understanding the mechanism of NO-mediated protein modifications, how NO regulates gene expression remains largely unclear. Here, we show that the energy sensor KIN10, a catalytic α-subunit of sucrose non-fermenting 1-related kinase 1 (SnRK1), plays a vital role in NO-mediated regulation of gene expression in Arabidopsis . NO-mediated S -nitrosylation at Cys-177 of KIN10 inhibits its degradation, leading to protein stabilization. A non-nitrosylatable mutation of Cys-177 to serine results in NO insensitivity and functional deficiencies. Quantitative phosphoproteomic analysis reveals that S -nitrosylation at Cys-177 of KIN10 modulates the phosphorylation of splicing factors within the spliceosome. We propose that NO regulates RNA splicing through the enhancement of KIN10 activity via S -nitrosylation, thereby establishing a molecular link between NO signaling and gene expression.
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2025
·
IF 10.3
Weixia Wang,Yongji Zhang,Fei Zhao,Libo Wang,Fanpeng Meng,Shuchao Qin,Jinsheng Zhao
Carrier recombination in polymer photocatalysts involves both undissociated exciton decay and charge recombination, which are the main obstacles limiting their photocatalytic activity. Achieving efficient charge generation and separation in a polymer system is a fundamental strategy for the potential success of solar energy conversion to hydrogen, but it remains a huge challenge. In this study, we propose an innovative intermolecular π–π stacking strategy to construct a π-delocalized all-polymer S-scheme heterojunction for photocatalytic hydrogen evolution. Two conjugated porous polymers (CPPs)—PyB, composed of benzo[1,2-b:4,5-b′]dithiophene (BDT) and pyrene units, and PhB, composed of BDT and benzene—were synthesized and integrated with CN nanosheets. The highly planar and π-extended structure of PyB facilitated strong interfacial π–π stacking with CN, forming an extended π-delocalized network that enhanced the internal electric field (IEF), improved charge separation, and boosted visible-light absorption. As a result, the optimized PyB/CN-20 composite achieved a remarkable hydrogen evolution rate (HER) of 23.84 mmol⋅h −1 ⋅g −1 under visible light, approximately 287 times higher than that of pristine CN. This work underscores the critical role of polymer planarity and π-conjugation in heterojunction efficiency, and provides new insights into the rational design of π-delocalized S-scheme systems and establishes a general strategy for developing highly efficient, metal-free photocatalysts by leveraging molecular-level structural control.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Ye Wang,Yulong Ying,Lvlv Ji,Wei Li,Yuan Wei,Tao Wang,Sheng Wang
The concurrent generation of clean hydrogen fuel and value-added organic compounds through photocatalysis offers a promising pathway for solar-to-chemical conversion. Here, we present a ternary Au-mediated S-scheme heterostructure comprising hollow TiO 2 nanobowls (HTNB), vertically aligned ZnIn 2 S 4 (ZIS) nanosheets, and interfacially confined Au nanoparticles. The hollow TiO 2 scaffold, fabricated via a green and scalable electrospray method, shortens carrier diffusion paths, while the direct S-scheme junction preserves strong redox potentials. Embedded Au nanoparticles at the HTNB/ZIS interface act as directional electron mediators, enabling cascade charge transfer (TiO 2 → Au → ZIS) and suppressing recombination. The optimized HTNB/Au@ZIS achieves a remarkable H 2 evolution rate of 42.27 mmol g −1 h −1 with an apparent quantum efficiency of 59.5 % at 380 nm under simulated solar light, among the highest reported for TiO 2 /ZIS systems. In a sacrificial-free system, it simultaneously produces 4.48 mmol g −1 h −1 H 2 and 4.05 mmol g −1 h −1 N-benzylidenebenzylamine with > 99 % selectivity. Comprehensive spectroscopic, electrochemical, and EPR analyses confirm the Au-mediated S-scheme charge-transfer mechanism. This work demonstrates a generalizable interfacial-engineering strategy for coupling oxidative and reductive photocatalysis, advancing the design of efficient dual-functional photocatalysts for solar-to-chemical energy conversion.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Penghui Guo,Zhaoshuang Li,Jinlin Luo,Xu Xu,He Liu,Yini Cao,Yuanfeng Wei,Zhexuan Liu,Yan Qing,Yiqiang Wu
Cadmium (Cd) and lead (Pb) contaminate aquatic environments and soil systems, threatening ecosystems and human health via bioaccumulation, while current remediation materials are often limited by insufficient adsorption capacity and restriction to a single medium. To address these challenges, a novel almond shell biochar co-functionalized with L -cysteine ( L -Cys) and selenium (Se) was prepared ( L -SeBC). This synergistic integration endows L -SeBC with abundant active sites for effective remediation. Adsorption thermodynamics demonstrated the maximum of 147.7 mg/g (Cd 2 + ) and 203.4 mg/g (Pb 2+ ). Density functional theory (DFT) calculations indicated that the enhanced adsorption occurred via chemisorption-physisorption synergy. In soil remediation experiments (5 % w/w L -SeBC application), the available Cd and Pb decreased by 45.1 % and 52.1 %. The addition of L -SeBC promoted soybean growth in contaminated soil, and reduced Cd and Pb contents in leaves (by 55.6 % and 68.9 %) and roots (by 28.6 % and 29.0 %). Furthermore, L -SeBC increased the activities of plant enzymes and soil enzymes, enhancing nutrient cycling and stress resistance of plants. Microbial analysis revealed that L -SeBC reshaped the soil microbiome by enriching functional genera (e.g., Pseudomonas spp.). Overall, the waste-derived, multifunctional adsorbent L -SeBC is cost-effective and eco-friendly, enables multi-scenario remediation, and exhibits great practical potential in sustainable pollution control.
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DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Chengzhen Fu,Hailu Wang,Hongxing Zhan,Yuanbing Li,Shujing Li,Bo Yin
Reducing the Ca/Si molar ratio is critical for optimizing calcium silicate hydrate (C–S–H) materials and enabling the recycling of silicon-rich waste. However, achieving high-performance crystalline C–S–H at Ca/Si < 0.83 remains challenging. This study proposes and systematically investigates a dual-silicon-source strategy, employing both active and inert silicon sources to regulate hydrothermal synthesis. At Ca/Si = 0.6, experimental results demonstrate that increasing the active silicon source content from 0 % to 60 % enhances tobermorite crystallinity by 275 %, decreases thermal conductivity by 26 %, and improves compressive strength by 7.30 MPa. The optimal performance was obtained at a reactive silicon-to-calcium molar ratio of 1.0. These findings confirm that this strategy significantly enhances C–S–H crystallinity and material performance. Mechanistically, the higher reactivity of the active silicon source drives competitive calcium consumption, facilitating the formation of long-chain crystalline C–S–H. This approach demonstrates a scalable pathway for synthesizing high-performance C–S–H under low Ca/Si conditions, offering promising applications in optimizing C–S–H-based materials and the recycling of silicon-rich waste.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiawei Xiao,Yongli Li,Jinshu Wang,Ting He,Junshu Wu,Panting Song,Youheng Yao
Photocatalysis is regarded as a promising strategy to address global energy and environmental challenges. Therein, S-scheme heterojunctions composed of complementary semiconductors can significantly enhance the utilization efficiency of photogenerated charge carriers while preserving the inherent strong redox capabilities of the semiconductors. However, the inadequate interfacial contact between the host and guest semiconductors hinders the enhancement of carrier separation efficiency. Herein, we developed a facile route to obtain uniform dispersion of WO 3 quantum dots (QDs) on g-C 3 N 4 . Specifically, the interfacial W-N bonding tightened the connection between WO 3 and g-C 3 N 4 , which serves as an efficient pathway for electron transfer, and significantly accelerates the directional migration of charge carriers following S-scheme. The optimized WO 3 QDs/g-C 3 N 4 S-scheme heterojunction exhibits a remarkable hydrogen evolution rate of 11,097.3 μmol·g⁻¹·h⁻¹ under simulate solar irradiation. Notably, the catalyst enables prominently overall water splitting without adding sacrificial agent, achieving simultaneous evolution of stoichiometric hydrogen and oxygen, 254.5 and 125.8 μmol·g⁻¹·h⁻¹, respectively, which are 5.2 times higher than those of WO 3 NPs/g-C 3 N 4 . Even without deposition of Pt as the co-catalyst, WO 3 QDs/g-C 3 N 4 displays noticeable gas production from water. This work will provide an idea for design and preparation of efficient photocatalyst.
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CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Haochuan Wang,Xin Liu,Chong Wang,Wei Wang,Jinxiang Hong,Pan Feng
Ultra-early mechanical properties are critical for shotcrete performance, significantly influenced by ettringite and calcium silicate hydrate (C-S-H) formed during the initial hydration stage and free water. This study investigates the individual and synergistic effects of these phases on mechanical behavior using equivalent cement pastes. In this system, cement was entirely replaced with dolomite particles of matching size distribution, with the controlled introduction of free water, ettringite, and C-S-H. The validity of these equivalent systems was confirmed through comprehensive characterization. Mechanical performance was subsequently evaluated using compression, shear, Vickers hardness and nanoindentation tests. Results revealed that free water remarkably weakened the mechanical properties, whereas both ettringite and C-S-H enhanced strength by reducing voids and reinforcing weak particle interfaces. Ettringite primarily contributed to interparticle friction, while C-S-H enhanced cohesion at interfaces including dolomite-dolomite, dolomite-ettringite and ettringite-ettringite contacts. When co-existing, C-S-H formed within the porous ettringite network, not only establishing a multi-scale filling structure but also stabilizing the dolomite-ettringite skeleton. These findings advance our understanding of the early-age mechanical development of shotcrete and highlight the potential of equivalent cement systems as robust tools for research into cementitious materials.
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危险品化学品经营许可证（带存储）