Journal of Sustainable Metallurgy
·
2025
·
IF 3.2
Ma Kaihui,Wu Qinghui,Fang YunPeng,Deng Junyi,Zheng Kui,Qiu Shuxing,Chen Mao,Xu Jian
The issue of carbon emissions in the iron-making process is receiving increasing attention, and the utilization of hydrogen (H 2 )-reduced iron ore presents an appealing prospect for application. Iron oxides are the primary components involved in the iron-making process, and their reduction in H 2 holds significant research value. In this work, the softening–melting behaviors of quaternary/quinary-FeO-rich oxides in four different gases, namely 100%N 2 , 10%H 2 + 90%N 2 , 40%CO + 60%N 2 , and 10H 2 + 40%CO + 50%N 2 , above 900°C are studied by simulating the cohesive zone of blast furnace. Compared to CO, H 2 exhibits a higher reducing capacity and can achieve a faster reduction of metal iron. However, due to its inability to promote carburizing and further liquation of metal iron, iron remains in a dense metallic state within the packed bed, hindering its further reduction into iron oxide particles and consequently slowing down the shrinkage of the packed bed. Delaying the initial temperature of reaccelerated shrinkage to more than 1300°C also reduces the pressure drop within the packed bed. Its limited ability for liquid phase generation plays a positive role in influencing both the height contraction and permeability reduction of the packed bed. Furthermore, the formed spinel phase in H 2 with high melting point did not shrink until the temperature was increased to 1400°C, and a sudden increase in shrinkage rate (SR) to 0.12%/°C or above was observed. Graphical
研究领域:
冶金学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2021
·Vol. 129
·期 10
·
IF 2.546
Zhong Lin,Mao Yaofeng,Zhou Xu,Zheng Dawei,Guo Changping,Wang Ruihao,Zhang Xingquan,Gao Bing,Wang Dunju
Advanced techniques, such as 3D printing, have been developed for the design and fabrication of unique structures to meet user-customized requirements. However, the traditional 3D printing technique has not been used for the construction of the nanothermite hollow structure, hindering the development of 3D printing and the further applications of nanothermite materials. Recently, we discovered an unexpected self-accelerating combustion phenomenon of hollow fiber nanothermite (Al/CuO/fluororubber ternary composite). The results show that the stable flame propagation rate of the nanothermite hollow fiber significantly improved compared to the solid fiber from 0.09 to 395 m/s (up to 4400 times higher than the solid fiber), and the combustion test also exhibits the self-accelerating propagation of combustion by the “cavity-mediated effect.” With the versatile shape-design capability, this work on hollow structure nanothermite and developmental potential of 3D printing could lead to structural applications of microrockets, aerospace propulsion components, space exploration, microelectromechanical system (MEMS) devices, and high temperature destruction of MEMS.
研究领域:
材料科学
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燃烧学
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先进制造
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
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IF 9.231
Xin Zhang,Li Tian,Zhuo Sun,Qian Wu,Xiangyu Shan,Yingjie Zhao,Ruizhan Chen,Juan Lu
A molecular-imprinted electrochemiluminescence sensor for procymidone (PCM) detection was reported based on Ru(bpy) 3 2+ @ZIF-7. A novel self-accelerated Ru(bpy) 3 2+ @ZIF-7 was prepared by one-step synthesis method, which exhibited high electrochemiluminescence (ECL) emission as a coreactant in the presence of tri- n -propylamine (TPrA). Concretely, ZIF-7 was not only the carrier of Ru(bpy) 3 2+ , but also the co-reaction promoter of Ru(bpy) 3 2+ /TPrA ECL system. The introduction of molecular imprint polymer (MIP) with PCM gave new characteristics of specific recognition of analyte PCM. The change value of ECL intensity (ΔI) was proportional to the logarithm of PCM concentration, with a wide linear range and a low detection limit of 1.0 × 10 −10 to 1.0 × 10 −6 mol L −1 and 2.0 × 10 −11 mol L −1 , respectively. The presented MIP-ECL sensor had high sensitivity, selectivity and stability, and had great potential in the field of food safety detection.
研究领域:
分析化学
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食品安全检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2024
·Vol. 49
·期 9
·e202400071
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IF 1.7
Yi-min Luo,Yu Xia,Jun-hong Wang,Teng Ma,Zhang-qi Feng,Sen Xu,Xing-liang Wu
Burning rate suppressants (BRSs) refer to a series of additives that reduce the burning rate of propellants, crucial for achieving sustained and stable thrust. This research focuses on assessing the impact of ammonium sulfate and ammonium oxalate on thermal stability and their potential as BRSs. Due to the stronger inhibitory effect of ammonium sulfate on the AP proton transfer process, the activation energy of propellant's first decomposition can be increased from 94.71 kJ mol −1 to 129.69 kJ mol −1 at a 3 % addition level. Based on Semenov model, the self-accelerated decomposition temperatures (TSADT) were calculated and validated through 7-day isothermal test. Introducing ammonium sulfate and ammonium oxalate raised the TSADT from 197.31 °C to 220.90 °C and 215.06 °C, respectively, deviating less than 4 % from experimental results. Among the propellants tested, those with ammonium sulfate showed prolonged response delay times (44.43–33.60 h), lower superheating temperatures (222.8–445.5 °C), and reduced mass loss rates (33.0–71.4 %) after 7 days of isothermal storage at 220–240 °C. The consistency between thermal analysis and isothermal test underscores the significant impact of activation energy on thermal stability.
研究领域:
推进剂化学
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热分析
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 5
·822-828
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IF 3.1
Zhang Yu,Zheng Jianzhi,Li Xijuan,Wu Ying,Zhang Ke
A self-accelerating three-component reaction was developed using the secondary amines, CS 2 , and sym-dibenzo-1,5-cyclooctadiene-3,7-diyne (DIBOD) as reactants. In this three-component reaction, the secondary amine reacts with CS 2 to form dithiocarbamate anion, which subsequently in-situ reacts with DIBOD behaving a self-accelerating reaction property. Specifically, the reaction of dithiocarbamate anion with the first alkyne of DIBOD activates the unreacted alkyne, which reacts with dithiocarbamate anion much faster than the original alkyne of DIBOD. Using the self-accelerating three-component reaction as polymerization reaction, a stoichiometric imbalance-promoted step-growth polymerization method was developed using the difunctional secondary amines, CS 2 , and DIBOD as monomer groups. This novel three-component polymerization can quickly produce high molecular weight dithiocarbamate-containing polymers under mild conditions using a slight molar excess of DIBOD to difunctional secondary amine monomer. Containing sulfur elements in the backbones, the resultant polymers hold high refractivity and may find potential applications in optical and optoelectronic fields.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yutong Xiao,Xiaofei Huang,Hou Li,Qing-Wen Han,Yu Zhang,Fan Tian,Man Xu
Atomically precise Ag4Ni2 nanoclusters with 2,4-dimethylbenzenethiol as the ligands were synthesized and characterized as a cocatalyst of SiC for the selective hydrogenation of nitroarenes to arylamine in the presence of NaBH4. The obtained Ag4Ni2/SiC samples exhibited extraordinary catalytic activity, and a self-accelerated catalytic process was observed with the reduction of nitrophenol to aminophenol as the model reaction. Experimental comparison between the Ag4Ni2/SiC samples before and after the catalysis showed that the transformation of Ag4Ni2 clusters to polydisperse Ag particles as well as amorphous NiOx on the surface of SiC in the catalysis was the key to their high activity. AIMD calculations revealed that the transformation of Ag4Ni2 was driven by the presence of multiple hydrides on the cluster, which induced the detachment of the thiol ligand of the nanoclusters.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Bo Wang,Ya-Feng Huang,Peng-Fei Wang,Xiao-Jie Liu,Chang Yu,Wei-Guang Li,Xiao-Feng Wang,Xiong-Min Liu
The thermal oxidation reaction of 2,5-dimethylfuran (DMF) was investigated using a custom-designed mini closed pressure vessel test (MCPVT) and traced by 1 H nuclear magnetic resonance( 1 H NMR). The oxidation behavior was monitored by-via temperature–time (T-t) and pressure–time (p-t) plots of MCPVT recording. Oxidation products were determined via gas chromatography-mass spectrometry (GC–MS), and the generated peroxide was examined by iodimetry and thin-layer chromatography (TLC), with the thermal decomposition hazard evaluation by differential scanning calorimeter (DSC) and MCPVT. Results show that the DMF oxidation reaction proceeded through initial oxygen absorption at 39.3 °C, followed by an exothermic self-accelerating oxidation at 84.5 °C. DMF could form high level peroxide in auto-oxidation; the decomposition of peroxides would lead to the radical oxidation that the generated ·OH radical mainly attacks on the position 2/5 of DMF with subsequent addition of O 2 initiating ring-opening reaction, in which DMF was firstly converted to cis -3-hexene-2,5-dione, and then produced the trans -3-hexene-2,5-dione with strong photoisomerism. DMF oxidation showed a high level of residue formation, and those solid products contained considerable amount of peroxides with a high thermal hazard; its exothermic onset temperature (T 0 ) and decomposition heat (Q DSC ) of 58.8 °C and 1982.3 J∙g −1 , and the decomposition maximum temperature rising rate (dT/dt) max and maximum of pressure rising rate (dp/dt) max was 9.98 °C∙s −1 and 291 kPa∙s −1 , respectively. Thermal decomposition of those peroxide products could give rise to thermal runaway of DMF oxidation, and further transformed into a detonation possibly.
研究领域:
化学工程
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安全科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2024
·
IF 14.3
Yanan Feng,Da Lei,Baiyi Zu,Jiguang Li,Yajuan Li,Xincun Dou
The design and development of ultra-accurate probe is of great significance to chemical sensing in complex practical scenarios. Here, a self-accelerating naphthalimide-based probe with fast response and high sensitivity toward hydrogen peroxide (H 2 O 2 ) is designed. By coupling with the specially selected upconversion nanoparticles (UCNPs), an ultra-accurate colorimetric-fluorescent-upconversion luminescence (UCL) tri-mode platform is constructed. Owing to the promoted reaction process, this platform demonstrates rapid response (< 1 s), an ultra-low detection limit (4.34 nM), and superb anti-interferent ability even in presence of > 21 types of oxidants, explosives, metallic salts, daily compounds, colorful or fluorescent substances. In addition, the effectiveness of this design is further verified by a sponge-based sensing chip loaded with the UCNPs/probe in recognizing trace H 2 O 2 vapor from interferents with the three characteristic colors existing simultaneously. The proposed design of probe and tri-mode visualization detection platform is expected to open up a brand-new methodology for ultra-accurate sensing.
研究领域:
化学传感
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生物分析
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xiaojiao Du,Jun Sun,Yan Li,Wenhan Du,Ding Jiang
A highly sensitive electrochemiluminescence (ECL) aptasensor for lincomycin (Lin) detection was designed based on a novel self-accelerated ECL luminophore of Ag 3 PO 4 -Ti 3 C 2 nanohybrids. The Ag 3 PO 4 -Ti 3 C 2 nanohybrids demonstrated prominent ECL performances with K 2 S 2 O 8 as co-reactant, and the Ti 3 C 2 as co-reaction accelerator, which catalyzes K 2 S 2 O 8 into more active radicals and inducing a tremendous amount of excited-state luminophores. Besides, it can be used for loading aptamer molecules owing to its large surface area. Given these attributes, a self-accelerated ECL aptasensor for Lin detection was constructed based on the effect of target induced aptamer dissociating. Under optimized conditions, the ECL aptasensor exhibited wide linear relationship of 1.0 × 10 −4 nmol/L to 1.0 × 10 2 nmol/L, low detection limit of 6.17 × 10 −5 nmol/L (S/N = 3) and good stability and reproducibility for Lin detection. The aptasensor was successfully applied for the Lin detection in milk and water samples, implying immense potential in real applications.
研究领域:
分析化学
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生物传感器
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纳米技术
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药物分析
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuhang He,Jing Lao,Hua Ke,Yangcheng Lu
The alcoholysis process of ethylene–vinyl acetate copolymer (EVA) is both important and complex. In this work, we conduct experimental and computational investigations to examine the alcoholysis kinetics and mechanism of EVA with an ethylene content if less than 50 mol%. Our findings indicate that the overall structure of EVA polymer chain has little effect on the alcoholysis rate. However, the local structure of the acetate group, particularly its association with the ethylene content, significantly affects the overall alcloholysis. To predict the influence of ethylene content on the overall rate constant, we propose an empirical model based on detailed kinetic studies of triads. Additionally, we discover a self-acceleration phenomenon in EVA alcoholysis, although it is less pronounced compared to polyvinyl acetate. Furthermore, we employed quantum chemical calculation using density functional theory (DFT) to confirm the effect of structure on EVA alcoholysis. Notably, we investigate, for the first time, the influence of neighboring hydroxyl group on self-acceleration phenomenon through theoretical calculations. This work offers valuable insight into EVA alcoholysis and may serve as a guide for exploring its mechanism and designing processes for producing EVA related polymer materials.
研究领域:
聚合物化学
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材料科学
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计算化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2023
·Vol. 148
·期 13
·6133-6150
·
IF 4.4
Zhao Jihe,Hu Jiwen,Dong Yonglu,He Daguang,Gui Xuefeng,Cui Xiaohua,Tu Yuanyuan,Lin Shudong
Thermal runaway accidents have occurred mainly during storage and transportation of azo compounds because large amounts of heat were released during the course of thermal decomposition. In this study, the thermal runaway characteristics of 2,2′-azobis(2-methylbutyronitrile) (AMBN) were first comprehensively investigated via differential scanning calorimetry (DSC), accelerating rate calorimetry (ARC), and gas chromatography/mass spectrometry (GC-MS). The onset temperature ( T on ), heat of decomposition ( Q ), and adiabatic temperature rise (Δ T ad ) were determined, which were involved in the safety of storage and transportation. Corresponding thermokinetic analyses were performed using DSC and ARC data. The data obtained from the experiments and calculation were utilized to predict the self-accelerating decomposition temperature (SADT), the control temperature ( T NR ), and the emergency temperature ( T C,I ). In addition, the flammable components in the pyrolysis products of AMBN were studied, particularly mixed with incompatible materials, such as HCl, NaOH, and Fe 2 O 3 , which helped predict the risk of thermal runaway during storage and transportation. Graphical Abstract
研究领域:
化学工程
·
安全科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yao-Jia Ma,Fang-Qi Wang,Da-Wei Wang,Xi-Wen He,Wen-You Li,Yu-Kui Zhang
Macrophages have emerged as promising cellular vehicles for the delivery of therapeutic agents to tumor sites. However, the cytotoxicity of therapeutic agents toward the cellular carriers and the effective release of therapeutic agents at the tumor site remain the main challenges faced by macrophage-mediated drug delivery systems. Herein, a near-infrared (NIR)-triggered release of self-accelerating cascade nanoreactor (HCFG) delivered by macrophages (HCFG@R) was developed for synergistic tumor photothermal therapy (PTT)/starvation therapy (ST)/chemodynamic therapy (CDT). Attributed to the inherent tumor tropism of macrophages, HCFG@R could accumulate in tumor tissues and subsequently be disrupted by NIR laser, allowing the release of HCFG nanoparticles (NPs) from macrophage carriers. The released HCFG catalyzed the generation of O 2 from hydrogen peroxide (H 2 O 2 ), which in turn enhanced glucose oxidase (GOx)-mediated ST. Simultaneously, the H 2 O 2 and gluconic acid generated by ST could promote the production of hydroxyl radicals (·OH), thereby improving the therapeutic effect of CDT. The present study provides an innovative strategy for enhanced PTT/ST/CDT synergistic therapy through a macrophage-mediated delivery system
研究领域:
肿瘤治疗
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纳米医学
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生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）