Surfaces and Interfaces
·
2022
·
IF 6.137
Peiyuan Ji,Xiang Zhang,Jing Wan,Chengshuang Zhang,Qianxi Yang,Xuemei Zhang,Li-Yong Gan,Yi Xi
Challenges, such as limited active sites and undesirable cyclic stability, still hinder the practical applications of Ni-Co phosphides (NCP) based electrode materials. To solve those issues, Al-induced NCP nanosheets (NCAP) decorated on nickel foam were successfully fabricated and applied as a high-performance binder-free electrode material for alkaline supercapacitors . The transformation of NCAP during the reaction with alkaline electrolyte was also investigated. NCAP has a series of irreversible changes with the enhancement of the capacitive performance during the initial reaction with KOH to the final form of the Al-induced Ni-Co phosphides@layered double hydroxides (NCAP@LDHs) with the stable composite nanostructure . Moreover, the Density Functional Theory analysis results show that Al not only adjusts the density of states and ions migration barrier of the newly formed LDHs but also enhances the synergetic behavior between the LDHs and NCAP overall conductivity of the composites. So, a higher capacity of 1138.7 C/g was achieved in the NCAP@LDHs system compared with 643.5 C/g of NCP. The as-assembled hybrid supercapacitor (HSC) with satisfactory specific energy and specific power could light 160 LEDs and a hygrometer successfully, which suggests the potential to be applied in the energy storage field.
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高影响因子
BMC Chemistry
·
2024
·Vol. 18
·期 1
·1-13
·
IF 4.3
Chen Jialin,Li Shutao,Dai Mengnan,An Ming,Song Rui,Chen Yeqing,Song Jiaxing,Tian Quanwei,Zhong Xiting,Yan Qiushi
To improve the thermal and combustion properties of nanothermites, a design theory of changing the state of matter and structural state of the reactants during reaction was proposed. The Al/MoO 3 /KClO 4 (Kp) nanothermite was prepared and the Al/MoO 3 nanothermite was used as a control. SEM and XRD were used to characterize the nanothermites; DSC was used to test thermal properties; and constant volume and open combustion tests were performed to examine their combustion performance. Phase and morphology characterization of the combustion products were performed to reveal the mechanism of the aluminothermic reaction. The results show that the Al/MoO 3 /Kp nanothermite exhibited excellent thermal properties, with a total heat release of 1976 J·g − 1 , increasing by approximately 33% of 1486 J·g − 1 of the Al/MoO 3 nanothermite, and activation energy of 269.66 kJ·mol − 1 , which demonstrated higher stability than the Al/MoO 3 nanothermite (205.64 kJ·mol − 1 ). During the combustion test, the peak pressure of the Al/MoO 3 /Kp nanothermite was 0.751 MPa, and the average pressure rise rate was 25.03 MPa·s − 1 , much higher than 0.188 MPa and 6.27 MPa·s − 1 of the Al/MoO 3 nanothermite. The combustion products of Al/MoO 3 nanothermite were Al 2 O 3 , MoO, and Mo, indicating insufficient combustion and incomplete reaction, whereas, the combustion products of Al/MoO 3 /Kp nanothermite were Al 2 O 3 , MoO, and KCl, indicating complete reaction. Their “coral-like” morphology was the effect of reactants solidifying after melting during the combustion process. The characterization of reactants and pressure test during combustion reveals the three stages of aluminothermic reaction in thermites. The excellent thermal and combustion performance of Al/MoO 3 /Kp nanothermite is attributed to the melt and decomposition of Kp into O 2 in the third stage. This study provides new ideas and guidance for the design of high-performance nanothermites.
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高影响因子
COMBUSTION AND FLAME
·
2020
·
IF 4.57
Lirong Bao,Wei Zhang,Xiaojun Zhang,Yongyi Chen,Suhang Chen,Lizhi Wu,Ruiqi Shen,Yinghua Ye
In the controllable combustion field, hydroxyl ammonium nitrate (HAN)-based electrically controlled solid propellants (ECSPs) is of growing interest in green fuels with safety, throttle- ability and at-will on-off capability. However, the current research is confined to the ignition characteristics and ablation process of basic ECSP formulations (75 wt% HAN ionic liquid oxidizer , 5 wt% ammonium nitrate co-oxidizer and 20 wt% polyvinyl alcohol binder), rather than working in functional additives. Herein, multiwall carbon nanotubes (MWCNT) and nano/micro aluminum powders were introduced in ECSPs, facilitating electrical conductivity and energy release. It indicates that the homogeneous dispersed MWCNT in polyvinyl alcohol (PVA) microspheres , preparing by the micro-segmented flow method, results in a 9.8% increase in electrical conductivity of the ECSPs. At 0.5 MPa, ECSPs containing 1%, 3% and 5% 5 µm aluminum powder reinforce the burning rate by 38.0%, 186.3%, 214.7% and mass ablation by 10.7%, 95.2%, 175.6% at 200 V, yet the large heat release by excess aluminum powder shifts the non-self-sustaining combustion of ECSPs to self-sustaining combustion at high pressure (above 0.8 MPa). The mechanism of promoting ECSPs combustion by liberating aluminum-nitric acid (released by HAN ionization) reaction were proposed.
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高影响因子
International Journal of Metalcasting
·
2025
·
IF 2.5
Du Danfeng,Nie Xinfeng,Sun Chaowei,Liu Zexin,Guo Xiurong
Aluminum foam often collapses during the foaming process, adversely affecting its pore structure and resulting in suboptimal compression and energy absorption performance. To address this issue and enhance the mechanical properties of aluminum foam for broader applications in the automotive industry and other fields, this study developed an Al/TaC foam composite (AT-FC) using powder metallurgy. The composite incorporates tantalum carbide (TaC) as reinforcement particles, titanium powder as a combustion aid, titanium hydride as a foaming agent, and wood fiber as a space-holder material. The effects of varying TaC content on the pore structure and distribution of the aluminum foam composite were systematically investigated, alongside axial quasi-static compression tests. The results reveal that TaC content significantly influences the porosity and pore distribution of aluminum foam, while the inclusion of wood fiber as a spatial support material effectively prevents collapse. Compression tests showed that the mechanical properties were optimized with 10% TaC content, achieving a compressive strength of 10.223 MPa and an energy absorption capacity of 3.977 MJ/m 3 before reaching the densification strain. Graphical
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Mingming Luo,Fang Li,Panpan Dong,Yijun Tan,Ruowei Liu,Longping Xu,Pei Zhao,Zijian Wu
Kanamycin (KANA), a widely used antibiotic associated with foodborne disease, requires accurate monitoring solutions. This study presents a novel ultrasensitive electrochemical aptasensor for KANA quantification using a signal amplification method. The sensing platform was constructed with Cu/Al-MOF@Ti 3 C 2 nanocomposites as the support and incorporated aptamers specifically recognizing KANA. Among them, Cu/Al-MOF provided a high specific surface area for anchoring a large number of aptamers, Ti 3 C 2 was used to enhance the conductivity of the aptasensor, the aptamers have been used for the improvement of the sensitivity of the aptasensor, and the insertion of Cu/Al-MOF into Ti 3 C 2 sheets effectively prevents stacking between Ti 3 C 2 sheets. In the context of KANA, the specific recognition of the aptamer led to a decrease in the electrochemical signal. Under optimal conditions, the logarithm of the electrochemical output signal versus KANA concentration was linear over the range of 10 fM to 100 nM with a limit of detection (LOD) of 0.74 fM. In addition, the aptasensor showed excellent accuracy and high reproducibility and has been successfully employed in actual samples, enabling the detection of a wide range of targets by simply replacing the matching aptamer.
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高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Wenyue Yu,Huan Guo,Ya Liu,Yangyu Zhou,Yue Xiao,Jinrong Bai,Yanping Wu,Kai Zhong,Yina Huang,Hong Gao
High fluoride intake from tea consumption poses significant health risks, necessitating the development of defluorination adsorbents in the food industry. Defluorination from tea is particularly challenging due to the requirements for high adsorption efficiency, preservation of sensory quality, and high recovery rates of the adsorbents. In this study, we introduced an innovative aerogel bead, CMC-Al/HAP, which integrates hydroxyapatite (HAP) into a carboxymethylcellulose (CMC) sphere crosslinked with aluminum chloride through a green and straightforward process. Our results demonstrated that CMC-Al/HAP achieved a remarkable fluoride adsorption capacity of 23.51 ± 0.46 mg/g. Subsequently, we investigated the impact of various adsorption parameters, kinetics, isotherms, coexisting anions, and recycling potential on the adsorption behavior of the beads. The adsorption kinetics followed the pseudo-second-order and dubinin-radushkevich models, while the Langmuir isotherm provided a good fit for the adsorption data. Characterization studies conducted before and after adsorption indicated that the adsorption mechanism mainly involved ion exchange and electrostatic interactions. Notably, CMC-Al/HAP effectively reduced fluoride levels in brick tea infusions without affecting quality such as tea color, catechins, and aroma. These findings underscore the potential of CMC-Al/HAP aerogel beads as a practical defluorination solution, providing valuable insights into alternative methods for defluorination in the tea industry.
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PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 6
·e70217
·
IF 0
Qiuyun Zhang,Mei Deng,Xingxin Li,Nian Xu,Ting Li,Qing Liu,Zhengjun Liu,Yutao Zhang
The development of metal–organic frameworks (MOFs)–based heterogeneous catalysts with both Lewis acid and Brønsted acid sites has proved to be promising and useful because they offer an economical route to synthesize environment-friendly biofuels. Here, a series of Al-based MOFs, functionalized by single -H, -NH 2 , and -NO 2 groups, are successfully synthesized and applied as supports to load phosphomolybdic acid (HPMo) through a facile one-pot hydrothermal method, by forming composites of HPMo@Al-MOFs-X (where X = -H, -NH 2 , and -NO 2 ), and it was used to esterify fatty acids into biodiesel. The structural features of the prepared hybrid materials were evaluated by various techniques, including XRD, FTIR, BET, SEM-EDS, NH 3 -TPD, Py-FTIR, TG, and XPS. The material characterization revealed that the catalytic behavior of the prepared HPMo@AlB composite is better than HPMo@AlB-NH 2 , HPMo@AlB-NO 2 , and pure AlB. The optimized conversion of oleic acid (OA) is 97.5% under the optimized reaction conditions. Moreover, the composite maintained above 90% conversion after nine cycles and demonstrated excellent reusability. This outstanding catalytic activity and stability is mainly attributed to the large specific surface area (138.4 m 2 /g), appropriate pore volume (0.47 cm 3 /g), and mesoscale pore size (17.7 nm) of HPMo@AlB composite that reduced the mass transfer resistance, high total acidity, and the synergistic effect of Lewis acid and Brønsted acid sites and ensures efficient esterification. The present research introduces an important reference for advancing high-performance MOFs-based hybrid materials to industrialize biofuels production.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiahe Li,Changsheng Tang,Luyang Wang,Yulin Yang,Debin Xia,Jian Zhang,Ping Wang,Kaifeng Lin
The new composite fuel (Al-Li@TH@AP@Oxide) is a better strategy to improve the combustion effect of propellant through the structural design. This study focuses on the micro-explosion effect of Al-based alloy fuel, the improvement of surface oxygen concentration and the reduction of the distance between metal oxide and reducing agent. The stabilized Al-Li had good compatibility of 1 level with HTPB and curing property through the passivation of tris(hydroxymethyl)aminomethane hydrochloride (TH). Besides, the ammonium perchlorate (AP) and oxide could be attached to Al-Li@TH surface through evaporation induced self-assembly (EISA) method. The Al-Li@ [email protected] had the AP coating layer of 53.26 nm and good flammability with the reaction of oxidant and reducing agent. Moreover, the samples of Al-Li@ [email protected] @Oxide had better flammability with shorter ignition delay time, greater burning intensity and obvious micro-explosion phenomenon. The high temperature decomposition exothermic peak of AP could also be reduced to 344.8℃ of Al-Li@ [email protected] @CuO from 413℃ of Al-Li@ [email protected] . The doping of CuO presented the minimum ignition delay time of 0.6594 s, the highest burning temperature of 1343.28℃ and the fastest burning rate of 1.5297 mm s −1 through the comparison of Mn 2 O 3 , NiO and CuO propellants. In addition, the better combustion effect and structural advantage could also be proved through the size and composition of residue for the propellants of Al-Li@ [email protected] @CuO than Al-Li@TH/AP/CuO. The appearance of Al 2 O 3 and metal proved the occurrence of thermite reaction during propellant combustion. The feasible fabrication method would provide an innovative idea for further development of solid propellants with high combustion performance.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 5
·1079-1090
·
IF 7.2
Li Xiang,Zhu Nengwu,Xi Yunhao,Li Fei,Zhang Pengfei
Secondary aluminum dross (SAD) is a rich source of recyclable aluminum but poses considerable risk due to its high AlN content. Therefore, thoroughly removing AlN is essential, but intricate aluminum components and expensive additives pose challenges to the process. In this study, waste sodium acetate is proposed as an environmentally friendly additive for completely removing AlN and enhancing the extraction of aluminum from SAD. Through the exothermic decomposition of NaAc, reactions can occur at 850°C. AlN removal efficiency reached 93.19% after sintering, whereas Al leaching efficiency in the subsequent leaching process reached 90.49%, which were 37.86% and 375.26% higher than the removal efficiency of the control, respectively. These favorable results were attributed to the comprehensive transformation of aluminum species. The formation of soluble phase Na 1.95 Al 1.95 Si 0.05 O 4 occurred during the destruction of the Al 2 O 3 layer surrounding AlN and the transformation of other aluminum components. AlN decomposed upon contact with NaAc. Therefore, this study utilizes the decomposition properties of NaAc to provide an efficient and environmentally friendly route for removing AlN and extracting Al from SAD.
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高影响因子
COMBUSTION AND FLAME
·
2025
·
IF 6.2
Yanggang Huang,Yong Kou,Ting Chang,Jiaqi Wei,Hongfei Liu,Lei Xiao,Wei Jiang,Gazi Hao
Aiming at the critical issues of uneven dispersion, inadequate interfacial contact, and significant mass/heat transfer resistance inherent in the mechanical mixing process for traditional solid propellant charging, this study proposes a novel strategy for constructing energetic micro-units through core-shell structural design, with the aim of achieving highly reactive and integrated composites tailored for practical solid propellant applications. Using etched aluminum (Al) powder as the core and ammonium perchlorate (AP) together with hexanitrohexaazaisowurtzitane (CL-20) as the composite shell, Al@AP/CL-20 micro-units with uniform coatings of AP/CL-20 and well-defined core-shell structures were successfully fabricated via solvent evaporation. The thermogravimetric-differential scanning calorimetry (TG-DSC) and combustion analyses indicate that Al@AP/CL-20 energetic micro-units exhibit significantly earlier decomposition peak temperature compared to pure AP, larger and more concentrated exothermic peaks, as well as stronger combustion intensity and higher flame temperature than the Al/AP/CL-20 composite in the physical mixture. The result confirms that the Al@AP/CL-20 composite structure can effectively enhance the synergistic effect between components, thereby improving the performance of the micro-units. Moreover, as the etching time increases, the porosity of the Al powder surface rises, leading to a further enhancement in the combustion performance of the Al@AP/CL-20 energetic micro-unit. In particular, when the Al powder etching time reached 5 h and the mass ratio of Al/AP/CL-20 was 1:2:2, the Al@AP/CL-20 micro-units demonstrated the best combustion performance, with the highest light intensity and a maximum flame temperature of 1094 °C — a 49 % improvement over the physically blended sample (PAAC-2) with the same mass ratio. This is attributed to the well-defined core-shell structure, which significantly shortens mass and heat transfer distances between components, and a better-matched oxygen balance that imparts the best combustion efficiency. The study affirms that the core-shell energetic micro-unit strategy effectively overcomes the limitations of conventional mixing methods and provides a pathway for formulating highly reactive solid propellant with enhanced energy release efficiency.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tao Li,Weikun Sun,Jian Zhang,Shengqin Liu,Hongbin Chen,Zumin Qiu,Jason Chun-Ho Lam
Herein, an efficient and stable catalyst of Co 3 O 4 @LDH-AC was innovatively prepared through uniform loading of an activated carbon substrate with Mg/Al layered double hydroxide (Mg/Al-LDH) followed by dispersing Co 3 O 4 nanoparticles in the confined space of LDH. This unique flower-like spherical structure significantly improved the adsorption capacity and would increase the concentration of reactants in the confined space. Experimental results showed that levofloxacin (LFX) completely degraded in 4 min with the addition of µM peroxymonosulfate (PMS). The fast conversion of Co 2+ and Co 3+ in catalyst for the generation of highly reactive species is revealed via EPR, in-situ Raman, in-situ FT-IR, and XPS. Further tests of 5Co 3 O 4 @LDH-AC in effluent of hospital wastewater treatment showed that it not only possessed strong anti-interference capabilities, but also maintained stable catalytic activity in fixed-bed reactor for a long operation time. Therefore, the excellent catalytic performance in confined space offers the possibility of application for the degradation of micropollutants in real pharmaceutical wastewater discharged from hospital (800–1200 tons/day, COD > 150 mg/L).
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Yupeng Wang,Xiangyuan Yu,Shulong Wen,Yihu Sun,Huibin Wei
The effective and economical removal of heavy metal-organic complexes remain an urgent challenge in the field of industrial wastewater treatment. In this study, Ca-doped ferrihydrite composites and Ca/Al co-doped ferrihydrite composites were synthesized via a simple one-step co-precipitation method and applied for the oxidative removal of EDTA-Cu in a hypochlorite system. The incorporation of Al significantly enhanced the material's stability. The Fe-Ca-Al composite exhibited a catalytic degradation efficiency of 97 % after 4 reaction cycles, representing a 32 % improvement compared to the Ca-doped ferrihydrite (Fe-Ca). Mechanistic studies revealed that the Fe-Ca-Al composite demonstrated strong selective adsorption of the organic moieties in EDTA-Cu over a broad pH range. Moreover, the oxygen vacancies (Ov) induced by Ca and Al co-doping played a crucial role in the enhanced catalytic performance and efficient removal of EDTA-Cu. These abundant Ov promoted electron transfer and provided numerous surface adsorption sites, facilitating the conversion of O 2 · - to 1 O 2 . Given that 1 O 2 can rapidly degrade organic compounds containing amino and carboxyl groups, it shows excellent potential for the treatment of EDTA-Cu. This study presents a highly active and reusable catalyst based on a Ca-Al doping strategy, offering a promising approach for the removal of organic-heavy metal complexes.
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高影响因子
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