FUEL
·
2023
·
IF 7.4
Yinan Wang,Xuteng Zhao,Ting Chen,Zuwei Zheng,Rijing Zhan,He Lin
Pd/SSZ-13 with different Al distributions were hydrothermally synthesized and utilized as passive NOx adsorbers (PNA). The characterization results indicated that more concentrated Al distribution can not only improve the ion-exchanged level of Pd but also generated more Z 2 Pd 2+ sites at six-member rings. Thus, as revealed by NOx adsorption experiments, samples with more Z 2 Pd 2+ sites showed high NOx storage capacity as well as stronger water resistance. Besides, 84.8 % adsorption capacity of this sample was retained after hydrothermal aging treatment. On the other side, Pd existed as [Pd(OH)] + sites on SSZ-13 with isolated Al as the majority. These sites were vulnerable to H 2 O and less stable. Seriously Pd agglomerated was observed on the aged Pd/SSZ-13 with less paired Al. This study revealed that proper Al distribution on SSZ-13 could significantly improve the performance and stability of the catalyst and provided a new direction for the design of PNA catalysts.
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DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Zhiwen Wang,Zhenping Qiu,Chaojie Zhao,Zheng Pan,Guangxia Wang,Yue Guo
As demand for high-energy-density batteries grows, cobalt-free ultra-high‑nickel cathodes like LiNiO₂ are poised to revolutionize next-generation energy storage solutions. However, their practical use is hindered by structural degradation caused by phase transitions, oxygen loss, and detrimental interfacial reactions triggered by the strong oxidizing nature of Ni 4+ formed under high voltage, which together lead to rapid capacity degradation and poor cycling stability. To overcome these challenges, effective doping strategies are crucial. This study systematically examines the potential of Mn and Al doping to enhance the stability of LiNiO₂ using in situ XRD, TEM, XPS, and electrochemical testing. The results show that, while both Mn and Al doping enhance structural stability and cycling performance, they operate through different mechanisms. In particular, 4 mol% Al doping remarkably suppresses c-axis expansion, enhances phase transition reversibility, and achieves capacity retention of 84.8 % after 100 cycles at 1C. In contrast, LiNiO₂ exhibits good tolerance toward Mn doping up to 10 mol%, which helps mitigate structural degradation; however, the capacity retention remains moderate at 80.3 %. While Al doping primarily enhances electrochemical performance, Mn doping contributes to preserving the structural integrity of the cathode at higher concentrations. Our study reveals their complementary roles, providing a strategy to address structural challenges and advance sustainable cobalt-free energy storage solutions.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xingrui Li,Zihao Ma,Jiangmin Guo,Yu Zhang,Tianmeng Ye,Shaojun Liu,Peng Xing,Hao Song,Weihong Wu,Chenghang Zheng,Xiang Gao
Recycling Li, P and Fe from cathodes of spent LiFePO 4 batteries plays a significant role in mitigation of Li resources shortage, as well as environmental protection. In this study, black mass from spent LiFePO 4 batteries were subjected to roasting at 600 °C under a nitrogen atmosphere to inhibit the oxidation of Fe 2+ . Then, Li, Fe and P in the black mass were successfully leached into the solution under optimal conditions (2 mol/L H 2 SO 4 , liquid to solid ratio of 10:1, temperature of 35℃, 300r/min stirring for 120 min), that achieved the initial separation of these elements from graphite and part of Al. Subsequently, a two-stage precipitation process, consisting of a cementation reaction followed by pH value adjustment, was employed to sequentially remove Cu and Al from the leaching solution. The total separation efficiencies for Cu and Al achieved 99.93 % and 95.37 % (based on contents of black mass), respectively. After separation of Cu and Al, 96.03 % of Li and 83.69 % of P present in the black mass were successfully recovered in the forms of Li 2 CO 3 and FePO 4 , respectively. The strategy developed herein provides valuable guidance for the resource utilization of P, Fe and Li, demonstrating promising potential for industrial-scale applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhaojie Fang,Zetong Liu,Joe Yeang Cheah,Xinyi Guan,Huijuan Li,Tao Jiang,Shengping Wang,Xinbin Ma
A novel core–shell CaO based adsorbent with Al-Zr co-modification was synthesized via a facile one-pot calcination method. The CO 2 capture capacity and long-term stability of the adsorbents with different Ca/Al/Zr molar ratios were investigated. The co-doping strategy significantly enhanced the CO 2 capture capacity of the calcium-based adsorbents. Specifically, the optimized Ca24Al1Zr0.3 adsorbent exhibited excellent CO 2 adsorption performance in long-term adsorption–desorption cycles, with the CO 2 capacity of 0.53 g-CO 2 /g-ads after 40 cycles. The synergistic effects of Al-Zr co-doping were analyzed from a microstructural perspective. The core–shell Ca24Al1Zr0.3 adsorbent with a CaZrO 3 outer shell featured minimized particle size, abundant mesoporous and macroporous structures, and uniformly distributed doping components. Under the combined effects of structural modification and metal doping, it manifested enhanced CO 2 capture capacity. Based on the CO 2 adsorption mechanism of CaO, this study revealed that Al-Zr co-doping promotes oxygen vacancy generation and improves CO 2 adsorption performance. The Ca24Al1Zr0.3 adsorbent demonstrated the highest oxygen vacancy content and the most pronounced positive shift in Ca 2p binding energy. This shift enhanced electron-donating capability of calcium, effectively facilitating O 2− migration and CO 2 diffusion. Furthermore, the Ca24Al1Zr0.3 adsorbent exhibited superior carbonation reaction kinetics during long-term cyclic operation.
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高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Hao Fu,Xuesong Jiang,Xiaotian Chen,Zhenyi Hu,Jifei Sun,Zongrong Zhou,Ling Wang,Boyuan Ban,Jian Chen
Al is one of the most difficult to remove impurities from quartz. Even with HF, only a limited removal efficiency was demonstrated. This study proposes a novel and environmentally friendly strategy centered on a combined process of ball milling, Na 2 CO 3 roasting, fluorine-free acid leaching, and chlorination roasting. The core innovation lies in the strategic induction of a consecutive and reversible phase transformation cycle (α-quartz → cristobalite → α-quartz), which serves as an internal grain refiner to achieve continuous microstructure refinement, thereby constructing abundant fast pathways for impurity migration. A comprehensive XRD analysis was introduced to observe the microstructure evolution. The results indicate that Na 2 CO 3 promotes the phase transformation from α-quartz into cristobalite at a relatively low temperature, while chlorination roasting facilitates the reverse transformation back to α-quartz. It revealed that these two distinct phase transformations not only disrupt the crystal integrity but also lead to significant microstructure refinement accompanied by abundant lattice defects. Through these defects, Al impurities rapidly migrate to the quartz particle surface, where they react with the acid solution and HCl gas, enabling efficient removal. Under the optimal process, the Al removal rate reached 90.5 %, the total impurity removal rate attained 98 %, and the quartz purity increased from 99.683 wt% to 99.994 wt%. This work highlights the crucial role of reversible phase transformation-induced grain refinement as an efficient strategy for lattice impurity removal, offering a green and high-performance alternative to HF-based purification with demonstrated advantages in environmental safety, energy efficiency, and product yield.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 12
·e70119
·
IF 3.8
Shaobo Yang,Xian Liu,Chenxi Liang,Jiali Li,Yujie Ma,Sijie Kou,Juanli Deng,Bo Chen,Shangwu Fan
The study investigated the hydrothermal corrosion behavior of Y 2 O 3 -Al 2 O 3 -SiO 2 (YAS) and CaO-Y 2 O 3 -Al 2 O 3 -SiO 2 (CYAS) glass interlayers in SiC/SiC composite joints under simulated pressurized water reactor (PWR) conditions and evaluated their effects on mechanical performance. The corrosion rate of the YAS joint was ∼2.7 mg/(cm 2 ·day), primarily due to the rapid dissolution of SiO 2 , which triggered pitting corrosion and void formation. While the Y 2 Si 2 O 7 exhibited good stability, degradation of the glass network caused the hydrolysis of Al species, forming stable AlO(OH) corrosion products. These processes severely damaged the structural integrity, reducing shear strength to ∼6 ± 2 MPa after 15 days, making it unsuitable for application. In contrast, the CYAS joint showed superior corrosion resistance, with a corrosion rate of ∼0.16 mg/(cm 2 ·day), only 2.2% of the YAS joint. The CYAS joint maintained structural integrity and interface bonding. During corrosion, Y 2 Si 2 O 7 crystals formed, while a layer of corrosion intermediates covered and eventually transformed into AlO(OH) particles. After 25 days, shear strength remained at 26 ± 2 MPa, still satisfying service requirements. The hydrothermal corrosion mechanism of YAS-based glasses basically involved the breakdown of the glass network and formation of stable products, including Y 2 Si 2 O 7 and AlO(OH).
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zheng Yang,Jing Xiao,Wulue Xu,Qi Liu,Hongxia Gao,Min Xiao,Zhiwu Liang
The precise removal of heat-stable salts (HSS) from an amine solution remains a challenge where the current separation process can cause ineligible amine loss and decrease the CO2 capture efficiency. This work proposed an interpenetrating polymer network gel (SA-Al/PVA@ME) constructed with sodium alginate (SA), aluminum ions, and poly(vinyl alcohol) (PVA), followed by melamine encapsulation. The formulation of the adsorbent was optimized by orthogonal experiments, leading to an HSS adsorption capacity of 128.28 mg·g–1 in monoethanolamine solution. The encapsulation of melamine (ME) promoted its adsorption affinity for HSS with a slight decrease of capacity. The kinetics and isotherms studies verify the adsorption behavior, and the mechanism was revealed through Fourier transform infrared, Brunauer–Emmett–Teller, scanning electron microscopy–energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy analysis, suggesting the comprehensive effect of synergistic electrostatic interaction, ion exchange, coordination bonding, hydrogen bonding, and steric hindrance. The results suggest a new strategy to formulate adsorbents with high HSS removal efficiency and good selectivity over amine.
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高影响因子
ELECTROANALYSIS
·
2010
·Vol. 22
·期 10
·1136-1142
·
IF 2.63
Huanshun Yin,Yunlei Zhou,Shiyun Ai,Lin Cui,Lusheng Zhu
A glassy carbon electrode (GCE) modified with Mg-Al-SDS hydrotalcite-like clay (SDS-HTLC) was used for the sensitive voltammetric determination of 2-nitrophenol (2-NP) utilizing the oxidation process. The results indicate the prepared modified electrode has an excellent electrocatalytic activity toward 2-NP oxidation, lowering the oxidation overpotential and increasing the oxidation current. Under optimal conditions, the oxidation current was proportional to 2-NP concentration in the range from 1.0×10 −6 to 6.0×10 −4 M with the detection limit of 5.0×10 −7 M by DPV ( S / N =3). The fabricated electrode was applied for 2-NP determination in water samples and the recovery for these samples was from 95.6 to 103.5%.
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Zhaohui Han,Yang Xu,Shenggang Zhou,Peixian Zhu
Electrode materials with an Al-based coating and a Ti 4 O 7 ceramic interlayer were prepared by plasma spraying to obtain improved electrochemical properties . RuO 2 –TiO 2 coatings doped with Sn, Ta and Ir, or La were prepared by thermal decomposition. The results indicate that good bonding between Al and Ti 4 O 7 was obtained by plasma spraying . The dopants affected the electrochemical performance by changing the surface morphology of the active coatings. The addition of Sn not only improved the electrocatalytic activity in the chlorine evolution reaction but also inhibited the electrocatalytic activity in the oxygen evolution reaction . The electric potential distribution on the surface of the electrode materials with an Al-based coating and a Ti 4 O 7 ceramic interlayer was more uniform than that of a Ti/RuO 2 –TiO 2 anode. The results of electrowinning tests revealed that an Al/Ti 4 O 7 /RuO 2 –TiO 2 –SnO 2 anode exhibited the best anodic performance with lower energy consumption, a longer accelerated lifetime, more deposition of Co as a product, and greater efficiency.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongjiang Peng,Yanyu Song,Gongjie Hua,Jinhong Wu,Fuwen Liu,Kuangfei Lin,Cong Lu
Peroxymonosulfate (PMS) activation through non-radical pathways exhibits high efficiency and selectivity for pollutant degradation. However, the complex regulation of catalytic active centers makes the generation of 1 O 2 challenging. In this work, Beta zeolite with uniformly dispersed Al-Ov-Co active sites (Co-Beta zeolite) was synthesized via a simple impregnation method, which exhibits excellent 1 O 2 steady-state generation concentration (2.46 × 10 −11 M) at extremely low doses (0.05 g/L). Compared with the original Co 3 O 4 , Co-Beta zeolite displays significantly enhanced PMS activation efficiency, and the apparent reaction rate constant for degrading tetracycline hydrochloride (CTC) increases by 4.7 times. Pyridine infrared characterization confirms that cobalt ions occupy the Brønsted acid sites of the Beta zeolite and undergo proton exchange with them. Accompanied by the redistribution of electrons during the calcination process, some lattice oxygen in the material is removed to form Al-Ov-Co sites. The proportion of Co 2+ in the Al-Ov-Co sites dramatically increases, thereby ensuring efficient activation of PMS. As PMS is adsorbed onto the Al-Ov-Co sites, the H atom of PMS directly bonds with the O atom in Co-Beta zeolite, while the O atom in PMS forms a bond with Co 2+ . After the H O and S O bonds of PMS are broken, abundant 1 O 2 is produced. In practical application evaluation, Co-Beta zeolite shows satisfactory anti-interference ability, reliable cycling stability and acceptable metal leaching. This work inspires the design of highly-dispersed Co 2+ to promote non-radical pathways for PMS-activated water purification.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Chuandong Wu,Ruoyu Shi,Guoqiang Luo,Jian Zhang,Qiang Shen,Zhanghua Gan,Jing Liu,Lianmeng Zhang
The current study explores Al-Zn-Mg alloy reinforced with a high weight fraction of B 4 C particles as a model system to elucidate the relationship between the microstructure and mechanical behavior of submicron-grained, precipitation strengthened Al-based metal matrix composites (MMCs). Our results indicate that the incorporation of high weight fraction of B 4 C reinforcement particles can lead to a high dislocation density within the Al grains. Under identical aging condition, this results in an acceleration of the global precipitation kinetics compared to those of the unreinforced counterparts. The microstructures of the consolidated material and heat-treated material were characterized by a high density of plate-like η/η′, and some coarse “fiber-like” precipitates. The “fiber-like” precipitates were identified to be incoherent η 2 or η 4 precipitates. To elucidate the mechanical behavior of the composite, the contributions from various strengthening mechanisms were estimated using existing relationships. In addition, the effects of the reinforcement particles and precipitates on the fracture mechanisms are discussed.
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高影响因子
Progress in Natural Science-Materials International
·
2021
·Vol. 31
·期 1
·152-158
·
IF 3.607
Zhonghui Sun,Jia Zhou,Qingan Zhang
A new MgH 2 –PrF 3 –Al–Ni composite was prepared by ball milling under hydrogen atmosphere. After initial dehydrogenation and rehydrogenation, Pr 3 Al 11 , MgF 2 , PrH 3 and Mg 2 NiH 4 nanoparticles formed accompanying the main phase MgH 2 . The hydrogen absorption-desorption properties were measured by using a Sieverts-type apparatus. The results showed that the MgH 2 –PrF 3 –Al–Ni composite improved cycle stability and enhanced hydrogen desorption kinetics. The improvement of hydrogen absorption-desorption properties is ascribed to the synergetic effect of the in situ formed Pr 3 Al 11 , MgF 2 , PrH 3 and Mg 2 NiH 4 nanoparticles. This work provides an important inspiration for the improvement of hydrogen storage properties in Mg-based materials.
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高影响因子
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