JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Wenjing Zhang,Yun Wang,Hao Xu,Hui Zhang,Xiaoxia Lv,Xiaobo Pan
The development of high-performance aqueous zinc-ion batteries (AZIBs) is hindered by the intrinsic limitations of manganese-based cathodes, such as poor electronic conductivity and structural instability. Herein, we report a rational Mg²⁺/Al³⁺ co-doping strategy to engineer the properties of α-MnO₂. The optimized Mg₁Al₁@MnO₂ cathode exhibits a remarkable Zn²⁺ storage performance, delivering a high reversible capacity of 354 mAh g⁻¹ at 0.1 A g⁻¹ , exceptional rate capability, and outstanding cycling stability with 74.7% capacity retention after 1000 cycles at 2 A g⁻¹ . Comprehensive characterization reveals that the larger Mg²⁺ ions act as pillars to expand the (2 ×2) tunnels, while the similarly-sized Al³⁺ ions substitute for Mn⁴⁺ to reinforce the host framework. This synergistic modification induces a charge compensation effect, generating abundant oxygen vacancies and optimizing the Mn³⁺/Mn⁴⁺ ratio, which collectively enhance the intrinsic conductivity and ion diffusion kinetics. Furthermore, a highly reversible H⁺/Zn²⁺ co-(de)intercalation mechanism is confirmed. This work provides a generalizable design principle for developing durable cathode materials for advanced energy storage systems.
✓ 已验证
DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 4
·312
·
IF 4.5
Xuelai Zhao,Wuyu Wang,Zhenjing Jiang,Xinghua Zhang,Xiuzheng Zhuang,Qi Zhang,Longlong Ma
The homogeneous nature of L-proline organocatalysts restricts their application in aldol condensation due to poor recyclability and stability. Herein, L-proline was heterogenized by ionic intercalation into Mg–Al layered double hydroxides (LDHs), yielding a series of proline-intercalated catalysts with tunable layer structures. Co-precipitation and memory-effect reconstruction strategies were employed to regulate interlayer spacing and proline loading. The resulting catalysts exhibited efficient performance in the aldol condensation of furfural with ketones under mild conditions. The reconstructed catalyst re-Mg4Al1P achieved a furfural conversion of 88.67% and a total product yield of 85.54% at room temperature, with product selectivity exceeding 95%. Structural characterizations confirmed that proline was stabilized within the LDH interlayers via R–COO—Mg electrostatic interaction while preserving the secondary amine active site. Mechanistic analysis indicated that the reaction proceeded through enamine- or enol-mediated pathways depending on water content, while the layered LDH framework imposed geometric confinement that suppressed side reactions. Catalyst deactivation in aqueous systems was mainly attributed to proline leaching rather than structural collapse.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhiyu Wei,Xiaoqin Li,Shuang Han,Cihang Yan,Mingchao Sun,Yong Liu,Lu Fan
To expand the working pH range of NO 3 – -N reduction from aqueous solution, a two-step method including the Al/Cu bimetal and sulfamic acid reduction was developed. In this process, Al/Cu bimetallic materials were prepared by chemical deposition method and characterized by EDS, SEM, XRD and XPS. The NO 3 – -N reduction batch experiment showed that 100% of NO 3 – -N was reduced and converted to N 2 at pH of 7, Al/Cu dosage of 30 g/L and EDTA-2Na concentration of 6 mmol/L. When the pH value was adjusted to 3, 5 and 9, NO 3 – -N reduction efficiencies ca. 80–97% were also obtained in the first step, and 100% N 2 selectivity was further obtained with the second reduction step at pH of 3, 7 and 9. The kinetics study indicated that the Al/Cu reduction process was in accordance with the pseudo-second order kinetics model.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Chao Ren,Hongtao Wang,Junfeng Ji,Wei Li
Calcination is an effective way to improve the F − adsorption capacity of layered double hydroxide (LDH) materials, however, a molecular scale understanding of the enhanced defluoridation capability of calcined LDHs (CLDH) is lacking. This study investigated the mechanisms of F − adsorption by CLDH using 19 F solid-state NMR, X-ray photoelectron spectroscopy (XPS), and high-resolution TEM . Under calcination process, LDH underwent three periods: surface dehydration below 200 °C, structural dehydroxylation at 200–400 °C, and release of interlayer carbonate groups above 400 °C. Additionally, XPS and XRD characterization showed that CLDH could not recover to the original structural symmetry even after rehydration and reconstitution. The F − affinity was greatly enhanced for the calcined LDH, especially at high pH. At pH 10, the adsorption capacity could reach 22.0 mg F − /g for CLDH (500 °C calcined), about 6 times larger than that of LDH. The XRD analyses revealed that the F-adsorbed CLDH had a poorer crystalline degree as the calcination temperature increased, consistent with the TEM observation of abundant defects and Mg/Al oxides on the CLDH sheets. 19 F solid-state NMR spectra of the CLDH after F − adsorption showed that the formation of surface Al–F is the predominant F − adsorption mode at pH 7, whereas the Mg–F local coordination mode is the pronounced F − adsorption mechanism under alkaline conditions (pH 10). The present study provided a comprehensive understanding of CLDH in F − adsorption and suggested that calcination is a promising treatment for promoting the efficacy of polluted anion scavenging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 6
·065505
·
IF 2.025
Qinghong You,Xiulian Yin,Jun Wang,Chunhua Dai
A recyclable heterogeneous KF/Ca-Mg-Al-O catalyst was prepared by co-precipitation and calcination processes. The characteristics of the catalyst were investigated using FTIR, XRD, TG-DTG and SEM. Response surface methodology was utilized to obtain the best most extreme biodiesel production yield. The ideal biodiesel production conditions were: the amount of catalyst was 3 wt%; the reaction temperature was 65 °C; the alcohol oil molar ratio 9.8:1, the reaction time was 3.5 h. Under these amended conditions, the average biodiesel yield was 95.19%, which is well in close concurrence with the worth anticipated by the model. The repeatability of catalysts was studied. After using the catalyst seven times, the catalytic efficiency was only reduced by 2.7%. These results indicate that the catalyst has good catalytic efficiency and is recyclable.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Miao Zuo,Xinyu Wang,Wenlong Jia,Yanzhong Zhu,Xianhai Zeng,Lu Lin
As one of the essential building blocks for bio-chemicals and bio-fuels, the 5-Hydroxymethylfurfural (HMF) production is still challenging in a green and cheap way. This work developed a bio-derived aqueous-natural deep eutectic solvent (A-NADES) to synthesize HMF using α-Al 2 O 3 or Al(OH) 3 as robust catalysts, obtaining high yields of 67.1% and 63.6% HMF from glucose under mild reaction reactions, respectively. Different kinds of starches and starchy food waste also exhibited high conversion efficiency in the A-NADES system. The mechanistic study indicated that the in-situ formed Al (III) site of α-Al 2 O 3 during the reaction was critical for converting glucose-based carbohydrates. A-NADES could be effectively reused six times with a more convenient direct reuse method without significant activity loss. This study suggested a novel A-NADES reaction media in the synergistic reaction with robust aluminum-based catalysts for HMF synthesis, and proposed a novel process of food waste utilization in green solvents.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Ying Wang,Xingyi Zhou,Minhao Yin,Jibin Pu,Ningyi Yuan,Jianning Ding
Both a superhydrophobic structure and layered double hydroxide (LDH) coating were effective to improve the corrosion resistance of alloys. In this study, a superhydrophobic composite coating based on LDHs was constructed on Mg alloy by laser treatment, in situ growth of Mg-Al LDHs, and modification with octadecyl-trimethoxy-silane (OTS). The so-obtained composite coating was coded as L-LDHs-OTS, where L stands for laser treatment. Results showed that the L-LDHs-OTS composite coating presented the best anti-corrosion performance and the corrosion current density was reduced by about 5 orders of magnitude compared with that of the Mg alloy substrate. The excellent corrosion resistance was related to the superhydrophobicity of the composite coating, the compactness and ion-exchange capacity of the LDH layer, and the dense Si-O-Si network within the OTS layer. Moreover, the L-LDHs-OTS composite coating was still effective after 20 days of immersion tests, showing good long-term corrosion resistance due to the existence of hydrophobicity of the composite coating and the self-healing ability of LDHs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yi Zhai,Xubin Zhang,Fumin Wang,Guojun Lv,Tao Jiang,Yuzhou Wu,Mengyue Li,Mengyao Li,Qing Zhang,Yongkui Liu
Development of economic strategy to synthesize hollow zeolite with widely tunable Si/Al ratios providing variable acidity is of great significance in industry. Here, a one-step and low-cost strategy without mesoporogen was successfully developed to synthesize single-crystal hollow ZSM-5 containing mesopores/macropores, with variable Si/Al ratios of about 14–∞ and 114–∞ at critical TPA+/SiO2 ratios of 0.05–0.1 and 0.05, respectively. This is the first time the usage of a large amount of TPAOH was avoided while breaking the traditional limitation of Si/Al ratio (25–50). The component of synthesis system and crystallization temperature acting as the vital roles in hollow structure has been confirmed by a series of characterization. Moreover, according to the investigation of the evolution process, a novel racing crystallization mechanism based on the competition relationship between surface crystallization and the internal dissolution rate was proposed for the first time. The racing crystallization mechanism and internal nonprotective aluminum become the crucial factors for synthesis. The prepared hollow ZSM-5 zeolites exhibit superior catalytic performance in the different acidity-catalyzed condensation involving large molecules between benzaldehyde and n-butyl alcohol as well as 2-hydroxyacetophenone, which is mainly attributed to the property acidity, more accessible active Al sites on the surface, and shorter diffusion path. By calculating, the effectiveness factor (η) of hollow zeolite is close to 1, further confirming its better mass transfer ability. The strategy has also been successfully extended to the synthesis of high-amount Fe-doped, Ga-doped, and B-doped hollow silicate-1.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Yu-Hua Wu,Yu-Long Ma,Yong-Gang Sun,Wen-Xin Ji,Feng Lin,Yi-Peng Yang,Li-Juan Ma,Chun-Hong Zhu,Yi-Jie Xu,Qing Miao
The development of synthetic methods to obtain high value-added mesoporous Al-MCM-41 from a low-cost silicon-aluminum source with low toxicity is an active research topic in solid waste resource utilization. In particular, the controlled synthesis of MCM-41 with a two-level pore distribution is a challenging task. In this work, the synthesis of unimodal and bimodal mesoporous Al-MCM-41s was achieved using acids with different degrees of ionization from coal gasification fine residue (CGFR) as bulk solid waste generated by the coal gasification process. We determined that the degree of acid ionization affected the self-assembly of inorganic/organic species as well as condensation processes , resulting in some changes of the hexagonal mesoscopic structure. The unimodal mesoporous Al-MCM-41 with acetic acid HAc and bimodal mesoporous Al-MCM-41s with an inorganic acid environment (HCl, HNO 3 or H 2 SO 4 ) could be effectively prepared in a controllable manner by the silicon and aluminum source obtained at alkali dissolution time 6 h and crystallization conditions at pH 10.5 and 383 K in 72 h. Moreover, the synthesis of Al-MCM-41-HAc with different SiO 2 /Al 2 O 3 molar ratios (18–89) could also be realized by different alkali dissolution times. And alkali dissolution time (2–24 h) and the crystallization conditions (pH 4.5–11.5, temperatures 373–393 K, and time 48–96 h) also affected the formation of unimodal and bimodal mesoporous Al-MCM-41-HAc. In addition, the maximum adsorption amount onto bimodal mesoporous Al-MCM-41-H 2 SO 4 (476.19 mg g −1 at 308 K) was larger than that onto unimodal mesoporous Al-MCM-41-HAc (243.90 mg g −1 at 303 K). The mesoporous Al-MCM-41s showed good stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 48
·15162-15165
·
IF 6.641
Zhi Fang,Bingping Yang,Chunli Hu,Jianggao Mao
A new nonlinear optical material, Ba11[Al(PO4)4](P2O7)(PO4)3, was rationally synthesized via the hybridization of three types of anionic groups, namely [AlO4]5−, [PO4]3− and [P2O7]4−, via a spontaneous nucleation method. Ba11[Al(PO4)4](P2O7)(PO4)3 was characterized with high thermal stability, deep ultraviolet transparency and moderate second-order optical nonlinearity, which were favourable for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2019
·
IF 6.355
Yanhui Cao,Dajiang Zheng,Jingsong Luo,Fan Zhang,Cheng Wang,Shigang Dong,Yanlong Ma,Zhaoyuan Liang,Changjian Lin
In this work, a novel in-situ grown layered double hydroxide (LDH) film co-intercalated with inhibitors (vanadates) and low surface energy substance (laurates) was immobilized on Al substrates. A long-term monitoring of electrochemical impedance spectra (EIS) of the various samples in 3.5 wt.% NaCl solution demonstrated the synergetic protection of the intercalated two functional species. Meanwhile, the X-ray diffraction (XRD) result of the samples after immersion in NaCl solution for a long time presented the anion-exchange process between vanadates/laurates and chlorides. The synergetic effect of the two species loaded film significantly contributed to the enhanced long-term corrosion protection of aluminum.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jian Zhang,Jia-Fang Xie,Jia-Cheng E. Yang,Ding Li,Lu-Bin Zhong,Yu-Ming Zheng
CoFe 2 O 4 /BHC-LDH3 catalyst was constructed by decoration of Co/Al layered double hydroxides (Co/Al-LDH) on bamboo hydrochar (BHC) loaded with magnetic CoFe 2 O 4 to activate peroxymonosulfate (PMS) for ciprofloxacin (CIP) degradation. Taking advantage of structural modulation and synergistic effects between the multi-components, CoFe 2 O 4 /BHC-LDH3 demonstrated high efficient PMS activation and ultra-fast CIP removal (91.50 % within 10 min), compared with BHC (6.26 %), CoFe 2 O 4 (26.32 %), and Co/Al-LDH (40.10 %). Both free radical (SO 4 – ) and non-radical ( 1 O 2 ) were crucial during the degradation process, and a substantial decrease in aquatic toxicity of the intermediates was observed. Additionally, the stability of CoFe 2 O 4 /BHC-LDH3 in actual water environment was tested using a fixed-bed reactor, illustrating the CoFe 2 O 4 /BHC-LDH3 has good stability and anti-interference ability in long-term operation. Possible degradation pathways of CIP in the CoFe 2 O 4 /BHC-LDH3 + PMS system were proposed based on liquid chromatography-mass spectrometer analysis and density functional theory calculation. This work provides new strategies for hydrochar-supported catalyst synthesis for organic pollutants decomposition.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）