PROCEEDINGS OF THE COMBUSTION INSTITUTE
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2024
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IF 5.3
Nan Liu,Qi Chen,Xianwu Jiang,Jie Chen,Lidong Zhang,Jiaying Pan,Haiqiao Wei,Xingqian Mao
This work presents a three-stage hybrid nanosecond discharge (NSD) and direct current (DC) discharge assisted n -C 5 H 12 /O 2 /N 2 ignition with lower discharge energy and higher energy efficiency. The reaction rate coefficients between O 2 (a 1 Δ g ) and n -C 5 H 12 are updated by mass/Master equation simulation. The promotive ignition enhancement via reaction channel O 2 (a 1 Δ g ) + n -C 5 H 12 → C 5 H 10 + H 2 O 2 in the hybrid NSD/DC discharge is demonstrated. The results show that the ignition delay time of the three-stage hybrid plasma assisted ignition is 1–2 orders of magnitude shorter than that of the two-stage hybrid discharge when the reduced electric field strength in the DC discharge stage is over 10 Td. Meanwhile, the plasma-enhanced energy efficiency of three-stage hybrid discharge increases. This improved efficiency on ignition enhancement is due to the kinetic enhancement by the electronically excited species and radicals (O 2 (a 1 Δ g ), O( 1 D), N 2 (B) and O). The kinetic and thermal effects by plasma are effectively intergated to enhance ignition. However, more discharge energy deposited in the vibrationally excited states N 2 ( v ) in the two-stage hybrid discharge is less efficient on ignition enhancement due to the thermal contribution via vibrational-translational relaxation. In the aspect of NO x /N 2 O emissions, reduction efficiency of the three-stage hybrid discharge is two times higher than that of the two-stage hybrid discharge. By controlling the N/N( 2 D) production pathway e + N 2 → e + N + N( 2 D), the three-stage hybrid discharge reduces NO x and N 2 O production by 61.1 % and 90 %, respectively. The results show that the ignition delay time is non-monotonically dependent on the discharge pulse number. There exist optimal pulse number, reduced electric field and effective threshold power density of DC discharge to achieve maximum ignition enhancement and low NO x /N 2 O emissions. This study provides valuable insights into the use of NSD/DC hybrid discharge technology in advanced engines to achieve energy-efficient ignition enhancement and reduce NO x /N 2 O emissions.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qianchun Zhang,Jiumei He,Chengcheng Wan,Xixi Long,Zhaoru Ban,Shan Tang,Yanju Chen
Isobutyraldehyde is a harmful gas that poses a threat to both environment and human health. Therefore, it is essential to develop a highly selective, sensitive, and efficient sensor that can rapidly detect isobutyraldehyde traces. In this study, a cataluminescence gas sensor for isobutyraldehyde detection is developed utilizing porous aluminum nitrite. This sensor has a rapid response time and exhibits notable selectivity, stability, and sensitivity to isobutyraldehyde. The sensor operated effectively over a broad linear range of 0.776–310 ppm and achieved a detection limit of 0.155 ppm with a signal-to-noise ratio of 3. When applied to isobutyraldehyde detection in real samples, the developed sensor achieved recoveries in the range of 79.0–96.8 % with relative standard deviations (RSDs) of 4.6–8.7 %. The sensing mechanism was validated through density functional theory and gas chromatography–mass spectrometry. The sensor demonstrated excellent sensing properties, including enhanced sensitivity, selectivity, and stability, indicating considerable potential for trace isobutyraldehyde detection. Furthermore, it shows promise as an effective candidate for detecting other gaseous contaminants.
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CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Ping Wang,Xinchao Li,Jianfeng Li,Jin Zhang,Ting Wang,Zhicheng Fu,Wenli An,Guoxing Sun,Mingjun Chen,Jinni Deng
Traditional rigid polyurethane foam (RPUF) with flame retardancy might be easily damaged in some moist condition due to its hydrophobicity, which would lead to unsafety. Therefore, novel surfactants with both hydrophobic fluorinated group and flame-retardant phosphorus group were synthesized. With lower surface tension and more hydrogen bonds formed in polyurethane, the mixed surfactants, which were used in the preparation of RPUF, have not only obviously improved the size uniformity and integrity of cells but also enhanced its hydrophobicity, compressive strength and thermal insulating performance. Besides, effective ‘protection’ could be constructed on the surface of RPUF by prepared surfactants, when ammonium polyphosphate (APP) and expandable graphite (EG) were introduced to provide good flame retardancy. As a result, with just 2.8 wt% content of those functional surfactants, hydrophobic and flame-retardant RPUF with water contact angle of 126 °, limiting oxygen index of 25 %, compressive strength of 1.3 MPa and thermal conductivity of 27 mW/mK, were finally obtained, which is ahead of other flame-retardant RPUF reported before. It’s worth noting that, this hydrophobic and flame-retardant RPUF exhibits more stable and durable properties when soaking in HCl solution (2 mol/L), NaOH solution (2 mol/L), NaCl saturated solution and various solvents (THF and EtOH), or under strong fiction for 100 times and high and low temperature cycling test for 20 times. This would provide a novel and effective strategy to endow RPUF with enhanced and durable flame retardancy, hydrophobicity, compressive strength and thermal insulating performance even under extreme conditions.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Yu Chen,Yaxue Shen,Zhuojia Shi,Ziyang Zhang,Qing Zhang,Yanlong Wang,Minghui Feng,Chenyang Wang
All-solid-state sodium-ion batteries (ASIBs) have wide application prospects in the fields of renewable energy and electric vehicles due to their high energy density and long-life cycle. With the rapid development of industrialization, the number of ASIBs will increase, which might result in a significant increase in the price of metal in ASIBs in the near future. Many waste ASIBs would be produced and lead to waste of resources, environmental pollution and health hazards. Therefore, it is of vital important significance to provide a green and efficient method to recover waste ASIBs. Here, we for the first time propose a mild, green and low-cost strategy for recovery of cathode materials and all-solid-state electrolyte from spent ASIBs by using deep eutectic solvents (DESs). Results show that the highest leaching efficiency of Na in ASIBs cathode materials and all-solid-state electrolytes by using DESs is 88.3% and 56.9%, respectively. Moreover, we use a simple anti-solvent approach of recovering the metals in the leachate with low cost at room temperature. This work would provide a mild, green and low-cost strategy from recycling metals in cathode materials and all-solid-state electrolyte from waste ASIBs.
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ChemSusChem
·
2024
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IF 7.5
Yu Chen,Zhuojia Shi,Xueqing Zhang,Chenyang Wang,Yanlong Wang,Zihang Niu,Yuqing Zhang,Minghui Feng
Graphical We for the first time use green deep eutectic solvents to recover solid electrolytes from all-solid-state lithium-ion batteries with high efficiency and high Li/La selectivity at mild temperature. Furthermore, we screen 70 kinds of anti-solvents for the precipitation of extracted metal from leachate and find that 12 kind of anti-solvents could successfully precipitate at room temperature with high efficiency. All-solid-state lithium-ion batteries (ASSLIBs) are attracting significant attention due to their high energy density, conductivity and safety. However, they are expected to generate substantial waste in the near future, leading to resource depletion and environmental pollution. Therefore, it is crucial to achieve green, mild and safe recovery of ASSLIBs. Here, we for the first time to use green deep eutectic solvents (DESs) to effectively recover solid-state electrolytes (SSEs) from ASSLIBs at mild temperature. Results show that Li leaching efficiency can reach up to 87.5 % with a superhigh Li/La selectivity of 1902 at a low temperature of 80 °C. Furthermore, 70 anti-solvents are screened to recycle the dissolved SSEs from leachate and 12 anti-solvents could precipitate SSEs from leachate at room temperature. This research opens new possibilities for recovering SSEs from ASSLIBs using the sustainable, cost-effective and safe solvents.
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PubMed
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
·
2025
·Vol. 36
·期 3
·035110
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IF 3.4
Qianchun Zhang,Chengcheng Wan,Jiumei He,Zhaoru Ban,Shan Tang,Li Jiang,Yanju Chen,Xixi Long
In this study, mesoporous MgO nanoparticles were successfully synthesized using carbon quantum dots as templates and an outstanding cataluminescence sensor system was established based on these nanoparticles. In a particular situation, the constructed sensor demonstrated remarkable linear range was 0.3106–310.6 ppm (R2 = 0.9990) with a low limit of detection of 0.0994 ppm and a signal-to-noise ratio (S/N) of 3. The mesoporous MgO nanoparticle sensor was utilized to analyze the isobutyraldehyde content in real samples. Outstanding recoveries were achieved within range of 83.4%–111%, with the relative standard deviations (n = 7) ranging from 2.0% to 8.2%. Moreover, the 35 d test results showed that the sensor has good stability. Density functional theory and gas chromatography-mass spectrometry were used to research the mechanism of the designed cataluminescence sensor. This work presents a universal methodology for constructing isobutyraldehyde gas sensors with high sensitivity and selectivity, and mesoporous MgO nanoparticles sensors that expand the applications available in the industry and environment analysis.
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ACS Applied Nano Materials
·
2024
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IF 5.3
Qianchun Zhang,Yuxian Zhao,Zhaoru Ban,Li Jiang,Shan Tang
Cataluminescence (CTL) sensors are among the most simple, inexpensive, sensitive, and selective tools for gas sensing. This study presented a highly efficient and selective CTL sensor system based on mesoporous SiO2 nanomicrospheres for the quick and sensitive analysis of isobutyraldehyde. Furthermore, its response intensity was 12.7 times higher than that of a nonmesoporous SiO2-based sensor. The constructed CTL sensor exhibited a good linear range (R2 = 0.997) for detecting isobutyraldehyde, spanning 3.11–311 ppm, with a low detection limit of 1.1 ppm. This enabled successful analysis of trace isobutyraldehyde in real samples. Finally, the CTL mechanism of this sensor was further explored. This study presents an approach for the quality detection of an important volatile organic compound, isobutyraldehyde, by a mesoporous-based CTL sensor.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yu Chen,Zhuojia Shi,Zhenghui Liu,Yaxue Shen,Yanlong Wang,Minghui Feng,Qi Liu,Zheng Li
Intensive energy consumption, long leaching time and low leaching efficiency remain key problems in sustainable recycling of solid electrolytes (SSEs) from all-solid-state lithium-ion batteries. Here, we propose a novel strategy to simultaneously overcome these challenges by using representative green solvents, i.e., low-melting mixture solvents (LoMMSs). LoMMSs are novel green solvents with the advantages of low cost, ease of synthesis, biodegradability and tunability. Results show that LoMMSs composed of polyethylene glycol and p -toluenesulfonic acid monohydrate enables 88.5 % Li leaching efficiency from the SSEs within only 1 min at room-temperature. In addition, when using LoMMSs at room temperature for 1 h, the leaching efficiencies of Li, La, Al and Zr from SSEs could reach 97.0 %, 91.7 %, 73.7 % and 83.9 %, respectively. This could be attributed to the coordination and acid–base interactions in the recycling of SSEs.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiaoyang Wu,Shiji Lu,Yusheng Zhang,Kai Wu,Junzhong Jiang,Xiaoyin Liu,Dan Wei,Chengheng Wu,Jie Ding,Liangxue Zhou,Jing Sun,Hongsong Fan
Ischemic stroke induces catastrophic neurovascular damage through hypoxia- driven neuronal death and metabolic collapse, characterized by Adenosine Triphosphate (ATP) depletion and mitochondrial dysfunction. In this work, an injectable granular hydrogel platform GUD-HB@PDA is developed, composed of ureidopyrimidinone/dopamine (UPy/DA)-functionalized gelatin (GUD) microspheres and polydopamine-coated hemoglobin (HB@PDA). Attributing to UPy-based quadruple hydrogen bonding and catechol-mediated crosslinking, the hydrogel platform achieves brain-mimetic dynamic viscoelasticity and sustained oxygenation delivery. The import role of viscoelasticity and oxygen supplementation in energy metabolism regulation is confirmed. Notably, it is found that the oxygen supplementation contributes 36–39% ATP increase through alleviates hypoxia, while viscoelastic mechanics contributes 61–64% of ATP increase, dominating the energy regulation through TRPV4-mediated mechanotransduction. This study proves this mechanical bioenergetic regulation synergizing with oxygen-dependent pathways promotes neuronal differentiation and angiogenesis in ischemic-hypoxic environment, through concurrent activation of AMPK-mTOR metabolic pathways and neurogenic differentiation programs. In a photothrombotic stroke model, superior therapeutic efficacy with 5.4-fold neuronal maturation, 1.6-fold vascular infiltration, and 2.8-fold axonal regeneration versus present reports are demonstrated. In summary, focusing on mechanical mismatch and bioenergetic deficits, a unique strategy of viscoelasticity-oxygenation synergy through mechanical cues as fundamental metabolic regulators is established, providing a robust solution for energy-intensive neurovascular regeneration following ischemic stroke.
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LANGMUIR
·
2025
·
IF 3.9
Li Wang,Yi Zeng,Ruiqi yin,Yi Zheng,Zhen Li,Lihua Zhou,Guilong Yan,Zhenyu Li,Jingyu Chen,Jingjuan Lai,Dong Li,Dong Xiang,Chunxia Zhao,Hui Li,Bo Yu,Xuezhong Zhang,Han Li,Xungai Wang,Yuanpeng Wu
Oil spill pollution poses a severe environmental threat, necessitating the development of efficient and sustainable remediation strategies. In this study, we designed and synthesized a series of pH-responsive phase-selective organogelators (pRPSOGs) based on d-gluconic acetal derivatives with long-chain amine groups to selectively solidify oil in oil/water mixtures, facilitating its rapid removal and recovery. The gelation behavior, phase-selective capability, and pH-switchable properties of the synthesized pRPSOGs were systematically investigated by using inversion tests, rheological analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and small-angle X-ray scattering. Molecular simulations were further conducted to elucidate the self-assembly mechanism of the gelators. The optimized gelator, A12, exhibited excellent thermal stability and mechanical strength, ensuring structural integrity during oil spill recovery. Importantly, the pH-responsive property of A12 allowed for reversible solubility modulation, enabling efficient separation and recovery of both the gelator and oil phase without the need for energy-intensive distillation. This innovative strategy provided a reusable, energy-efficient, and environmentally friendly approach for oil spill treatment, offering promising applications for large-scale environmental remediation.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiaomu Shan,Jie Pan,Xuejian Du,Jian Shi,Zhuofan Wei,Yuanze Xu,Shouzhen Jiang
The excellent performance of surface-enhanced Raman spectroscopy (SERS) is closely related to the intensity, density and uniformity of hotspots. In this study, we introduce a PET/Au NPs@COF Raman substrate featuring three-dimensional hotspots. The spacing between each layer of gold nanoparticles (NPs) is precisely controlled by adjusting the thickness of the COF via the interfacial synthesis technique, causing the strong coupling between gold particles across the layers. The porosity of the COF enables the substrate to adsorb numerous analyte molecules into the large-area uniform hotspots. Through simulations and adsorption detection on the substrate, Raman testing further demonstrated that the substrate with double-layer Au NPs@COF exhibited the most favorable SERS performance. Additionally, the substrate allows for selective detection based on the particle size of the target molecule. The flexibility of the substrate enables it to conform to irregular surfaces, effectively capturing analytes from a variety of real samples.
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Materials Today Chemistry
·
2025
·
IF 6.7
Shumin Xu,Shilong Liu,Gao Liu,Gehui Li,Yi Xu
Oil spills have caused serious environmental problems, making oil absorbing materials highly important. Creating polymeric aerogels with compressive resilience, superhydrophobicity, high absorption capacity, and excellent regeneration capability remains challenging. In this study, polyacrylonitrile (PAN) nanofibers prepared by electrospinning were used as the aerogel skeleton, with carbon nanofiber (CNF) serving as flame retardants and conductive agents, and benzoxazine (BOZ) as a crosslinking agent. The composite nanofiber aerogels (PAN/PBOZ/CNF-x) were prepared through freeze-drying, followed by thermal curing of ring-opening of oxazine. The low-density aerogel (0.0113g/cm 3 ) exhibited remarkable properties, including over 96% compressive recovery after 30 cycles at 60% strain, superhydrophobicity (WCA = 150.6°), and low thermal conductivity (0.0346W/m·K at 25°C). Furthermore, they demonstrated high absorption capacities between 51.4 and 104.8 g/g for various organic solvents and realized rapid separation of oil-in-water emulsion, such as dichloromethane, with a maximum separation flux of 3022.59 L m −2 h −1 . Additionally, the aerogels showed excellent thermal stability (with a char yield of 83.6 % at 800°C for PAN/PBOZ/CNF-0.1 aerogel) and outstanding flame retardancy, endowing the aerogels with combustion regeneration capability, and providing a fast (∼1s) and durable (∼400s) hazard alarm response after fire removal, retaining 81.8% of their initial absorption capacity after ten combustion-absorption cycles. The multifunctionality of PAN/PBOZ/CNF-x aerogels offers a new strategy for designing advanced multifunctional aerogels.
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