HIGH PERFORMANCE POLYMERS
·
2020
·
IF 1.568
Yingfeng Wang,Jiabin You,Zhuowei Cheng,Kun Jiang,Linlin Zhang,Wanli Cai,Yun-Quan Liu,Shuirong Li
An improved sulfonated poly (ether ether ketone) (SPEEK) nanocomposite membrane was prepared by incorporating both phosphotungstic acid (HPW) and Al doped cerium-based oxides (Al-CeZrO4) in SPEEK matrix. The HPW was immobilized by Al-CeZrO4 so that firmly dispersed acid–base pairs were formed. The introduction of Al-CeZrO4 helped improve the chemical stability of the pristine (baseline) SPEEK membrane without compromising the conductivity, and the addition of HPW further enhanced the conduction of protons through acid–base interactions. Stability tests showed that when the SPEEK/Al-CeZrO4 nanocomposite membrane was immersed in a Fenton’s solution for 108 h at 80°C, a loss of 34.9% in proton conductivity was observed, which is 24.1% less than that of the pristine SPEEK membrane, indicating that the attenuation of membrane proton conductivity was inhibited. At the same time, the proton conductivity of the SPEEK/Al-CeZrO4/HPW nanocomposite membrane (that has already incorporated HPW) was increased by 15.5% compared to the SPEEK/Al-CeZrO4 nanocomposite membrane. Hence, Al-CeZrO4/HPW is considered as an effective inorganic nanofiller for improving both proton conductivity and chemical stability of SPEEK membranes, and the hybrid composite membrane is worth further studying.
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DOI
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Xuelin Huang,Liang Yu,Yinsheng Dong
A series of aluminum phosphate ceramic coating with the entrapped ceria (CeO 2 ) nanoparticles, which is denoted APC, were constructed by steam-assisted curing method on cast Al-10Si alloy. The composition, structure and morphology of the coatings were investigated using FT-IR, XRD, XPS and SEM. Moreover, the corrosion properties of coatings were evaluated by the electrochemical tests. All the coatings were demonstrated to be homogeneous, compact on the substrate surface. The appropriate amount of CeO 2 can effectively improve the corrosion resistance and durability of the coating. In addition, the formation and corrosion resistance mechanism of the coatings were studied in this work.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Nantong Zhang,Xuan Yang,Xinyao Yu,Yong Jia,Jin Wang,Lingtao Kong,Zhen Jin,Bai Sun,Tao Luo,Jinhuai Liu
In this study, adsorption potential of a typical aluminum-based metal–organic frameworks (MOFs), Al 12 O(OH) 18 (H 2 O) 3 (Al 2 (OH) 4 )(BTC) 6 ·24H 2 O (referred as MIL-96), was investigated for defluoridation of drinking water using batch experiment. The effects of different parameters such as pH, contact time, initial fluoride concentration, and competing anions were studied to understand the adsorption behavior of the adsorbent under various conditions. Optimum removal of fluoride ions occurred in a pH range of 3–10. The results indicated that the defluoridation efficiency and aluminum residual of MIL-96 were far superior to that of activated alumina (AA) or nano-alumina (NA). The Langmuir equilibrium model was found to be suitable for describing the fluoride sorption on MIL-96. The maximum fluoride uptake capacity for MIL-96 was calculated to be 31.69 mg g −1 at the temperature of 298 K. Moreover, there were no significant influence on fluoride removal by MIL-96 in the presence of chloride, nitrate, sulfate, bicarbonate and phosphate. Temperature study was carried out at 298 K, 308 K and 318 K revealed that the adsorption process was endothermic reactions. In column tests using real groundwater as influent, about 140 bed volumes (BVs) of groundwater were treated before breakthrough was reached under space velocities (SVs) of 4 h −1 . Results from this study demonstrated the MIL-96 is a promising adsorbent that can be potentially used into drinking water processes.
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 12
·2125-2131
·
IF 2.942
Chunyan Sun,Feng Zhang,Xiao Wang,Fangqin Cheng
Graphical A composite ammonium molybdophosphate/Al-MCM-41 material is synthesized by a one-pot method with natural clay as the silica and aluminum source. A modified “liquid-phase transport” step allows the use of impure natural clay as the starting material to produce pure product without sedimentation pretreatment. The composite material is effective for the adsorption of cesium ions from brine. Ordered hexagonal mesoporous aluminosilicate matrix (Al-MCM-41) with incorporated ammonium molybdophosphate (AMP) was successfully synthesized by a one-pot synthesis method with natural clay from low-grade potash ores of Qinghai salt lake as the silica and aluminum source. We introduced a modified “liquid-phase transport” step, which allowed the use of impure natural clay as a starting material to directly produce pure product without sedimentation pretreatment. The resultant product was characterized by X-ray fluorescence (XRF) spectroscopy, FTIR spectroscopy, XRD, TEM, 27 Al and 31 P magic-angle spinning (MAS) NMR spectroscopy, and N 2 adsorption/desorption, which indicated that the AMP was immobilized in the mesoporous structure of Al-MCM-41. The adsorption capacity of the final product for the removal of cesium ions in solution was also investigated. The results suggested that salt lake clay is a promising low-cost precursor for the production of mesoporous aluminosilicate supports through one-pot syntheses, and the final composite material is effective for the adsorption of cesium ions from solutions containing other alkali metal ions.
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 40
·23061-23070
·
IF 3.049
Libo Peng,Qinglong Xie,Yong Nie,Xuejun Liu,Meizhen Lu,Jianbing Ji
The oxidative cleavage of vegetable oils and their derivatives to produce bio-based aldehydes is a potentially useful process, although the aldehyde products are readily oxidized to carboxylic acids and thus seldom obtained in high yields. The present study developed a room-temperature method for the synthesis of bio-aldehydes via the oxidative cleavage of vegetable oil-derived epoxides, using H2WO4 as the catalyst, H2O2 as the oxidant, and t-BuOH as the solvent. Reactions were carried out at temperatures ranging from 25 to 35 °C for 3.5–10.5 h, and provided >99% conversion and >90% aldehyde yield. In particular, an approximately 97% yield was obtained at 25 °C after 10.5 h. As the reaction proceeded, the H2WO4 dissolved to form a W-containing anion. Several mesoporous Al-MCM-41 materials having different Si/Al ratios were hydrothermally synthesized and used as adsorbents to recover the catalyst by adsorbing these anions. The adsorption capacity of the Al-MCM-41 was found to increase with decreases in the Si/Al ratio. The Al-MCM-41 had little effect on the oxidative cleavage reaction at 25 °C, and thus could be directly added to the reaction system. The excellent anion adsorption performance of the Al-MCM-41 greatly improved the reusability of the H2WO4 catalyst. When using the Al-MCM-41 with the best adsorption performance, there was no significant decrease in the activity of the catalyst following five reuses.
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 50
·31466-31474
·
IF 3.108
Jun Qu,Xiaoman He,Xuewei Li,Ziqiang Ai,Yujie Li,Qiwu Zhang,Xinzhong Liu
An amorphous photocatalyst was prepared via simple dry milling of Zn basic carbonate (Zn4CO3(OH)6·H2O) and Al hydroxide (Al(OH)3) as a precursor of Zn–Al layered double hydroxide (LDH) and the precursor was agitated in water to simply synthesize the Zn–Al LDH for comparison. The adsorption and photocatalytic activity of the Zn–Al LDH and the precursor were studied via the removal of methyl orange (MO) and decoloration of MO under ultraviolet light irradiation in aqueous solution, respectively. The precursor exhibits much higher decoloration efficiency towards MO than the Zn–Al LDH product because of the synergistic effect of the intercalation reaction and its photocatalytic activity. The amorphous precursor could easily incorporate MO molecules to form MO intercalated LDH, allowing easy access of the organic pollutant to the photocatalyst sample, resulting in an obvious improvement in photocatalytic performance. The novel idea to use the precursor sample instead of the synthesized final product may be applied in other fields to increase the required performances.
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DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 39
·6987-6995
·
IF 3.756
Shujie Dai,Yangchun Tan,Yuhan Yang,Longfeng Zhu,Baogang Liu,Yanyan Du,Xuebo Cao
Organotemplate-free synthesis of zeolites assisted with zeolite seeds has been a hot topic in the past decade. Herein, we for the first time show an organotemplate-free synthesis of Al-rich S-ZSM-35 and S-ZSM-22 zeolites with the addition of ZSM-57 zeolite seeds. Notably, the adjustment of SiO2/Al2O3 and Na2O/SiO2 ratios in the starting gel to suitable values is an important factor in preparing the pure Al-rich S-ZSM-35 (Si/Al ratio at about 5) and S-ZSM-22 (Si/Al ratio at about 20) zeolites. The key to success is that the targeted ZSM-35 and ZSM-22 zeolite products have partly the same composite building units as the ZSM-57 zeolite seeds. The obtained Al-rich S-ZSM-35 and S-ZSM-22 zeolites show good crystallinity, typical crystal morphology, large BET surface area, and fully 4-coordinated aluminum species. In addition, as a typical example, the Al-rich S-ZSM-22 zeolite was evaluated by n-dodecane hydroisomerization reaction, which exhibits outstanding performance due to its Al-rich features (Si/Al ratio at about 20) compared with the conventional ZSM-22 zeolite (Si/Al ratio at about 30).
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Huaqiang Zhu,Shuo Wang,Zhanjun Guo,Hongdi Fu,Xinyi Han,Haiyang Wang,Yonghao Zhao,Haiyue Yu,Yong Yang,Siyuan Tang,Yiheng Li,Yanrui Hu,Tinglu Song,Meishuai Zou
Al-Li alloys are promising fuels for composite solid propellants due to their high energy density and favorable combustion characteristics. However, their application is limited by poor storage stability and inadequate interfacial adhesion. This study presents a novel dual-layer synergistic coating strategy using fluorinated alkylsilane (FAS) and polydopamine (PDA) to improve the interfacial stability of Al-Li alloys and the mechanical performance of Al-Li alloy-based propellants. The Sequential chemical deposition of FAS hydrophobic layer and PDA adhesive layer onto Al-5Li alloy particles was successfully accomplished and uniformly covered. The interfacial adhesion and wettability are increased by introducing catechol groups, which addresses the problems caused by FAS coating. Thermal analysis revealed negligible weight loss (≤0.191 %) from organic coating decomposition, indicating minimal impact on energy density. Mechanical testing showed that the fracture stress of propellants containing Al-5Li@FP particles was significantly improved to 1.593 MPa, and even surpassed those with pure aluminum, which was 1.263 MPa. Combustion experiments further showed a significant enhancement in the burning intensity of the modified alloy powders. This study achieves synergistic improvement of stability and interfacial adhesion in Al-Li alloys via a rationally designed PDA and FAS bilayer interface. Thereby offering an innovative pathway for developing high-performance solid propellants.
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Jiahui Liu,Xinchao Li,Min You,Hanjie Wen,Ziyuan Zhou,Zhiqi Liu
Eliminating harmful Cu 2+ from tainted water is still a major environmental problem. In this study, we achieved efficient removal of Cu 2+ from the solution by Na Li co-doped P zeolite (NLPZ), which was synthesized by template-free method. This method fully utilizes the Si/Al ratio in clay-type lithium ore, achieving high utilization rates of Si (94.72 %) and Al (96.62 %). Simultaneously, benefiting from the synergistic contribution of the synthesis stage and subsequent ion exchange, the overall lithium retention rate reaches as high as 82.60 %. The NLPZ exhibited exceptional Cu 2+ adsorption capacity (139.31 mg/g at 25 °C) through a dual mechanism: (1) ion exchange and (2) hydroxyl-mediated surface complexation. Adsorption followed pseudo-second-order kinetics and the Langmuir isotherm consistent with monolayer chemisorption, while thermodynamic analysis revealed endothermic behavior (ΔH = 5.9108 kJ/mol). In addition, the NLPZ maintained 94 % adsorption capacity after five regeneration cycles, demonstrating superior stability. This work provides an eco-friendly and scalable strategy for treating copper-contaminated wastewater by synergizing the efficient extraction of Si/Al from ore with the template-free synthesis of P-type zeolites.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Longxiangyu Cheng,Zuwei Xu,Haibo Zhao
To address the trade-off between CO 2 conversion and methanol selectivity inherent in Cu-ZnO based catalysts and mitigate the drawbacks of wet chemical synthesis methods, in this study, Cu/ZnO/Al 2 O 3 catalysts with high methanol selectivity were developed for CO 2 hydrotreating to methanol using a mechanochemical method suitable for industrial scale preparation. Combining CuO and ZnO precursors of different sizes (micronscale or nanoscale), four catalyst variants were prepared by a mechanochemical method combining ball milling and auto-combustion of citric acid, which compared with commercial catalyst prepared by co-precipitation method. Characterizations of the catalysts structure and element distribution indicate that due to the different thermal decomposition kinetics of copper citrate and zinc citrate during the calcination process, the surface Zn content of the ball milling catalysts significantly increase, thereby promoting the formation of the Cu-ZnO x interface. Among them, the catalyst of plain CuO + nano ZnO shows the best performance (0.4 g MeOH •g cat -1 •h −1 ). Although its CO 2 conversion is lower than that of commercial catalyst, it has better methanol selectivity and produced higher methanol space–time yield which remained stable during the 30 h stability test. In addition, H 2 -TPR and CO 2 -TPD experimental results show that although mechanical mixing resulted in ball milling catalysts with large copper grains, more oxygen vacancies and moderately strong basic sites enhanced Cu-ZnO synergism, inhibited the reverse water–gas shift (RWGS) reaction, and facilitated methanol synthesis.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bolong Jiang,Zhihe Tan,Nan Jiang,Shuai Wang,Huan Wang,Hua Song,Yanguang Chen
Upgrading biomass pyrolysis oil via hydrodeoxygenation (HDO) is essential to address its low calorific value and instability from high oxygen content. Herein, we describe a facile aqueous-phase synthesis strategy for fabricating an Al-doped mesoporous silica (Al-MS)-supported B-doped Ni metal-acid bifunctional catalyst (Ni-B/Al-MS) using NaBH 4 as the B source. The Al-MS support, characterized by radially gradient pores (expanding from center to periphery) and tunable acidity, is synthesized in aqueous phase with high yield. B doping (electron configuration 2s 2 2p 1 ) enhances acidity, synergistically modulates the electronic structure of Ni, and optimizes the dispersion and exposure of active sites. Notably, the decomposition of NaBH 4 in aqueous solution generates alkaline conditions, which etch silica to form support defects that act as anchors for metallic Ni. Theoretical calculations reveal that this dual modulation reduces the hydrogen dissociation energy by 27.0 % and the C–OH activation (rate-limiting step) energy barrier by 1.91 eV. Under mild reaction conditions (200 °C, 2 MPa H 2 , 1 h), the Ni-B/Al-MS catalyst achieves near-complete m-cresol conversion (99.5 %) and high methylcyclohexane (MCH) selectivity (91.9 %), outperforming most previously reported systems at substantially reduced reaction temperature and time. This work demonstrates the successful integration of atomic-scale modulation (B doping), mesoscale structural control (gradient-pore support), and bifunctional active sites, providing an effective catalytic strategy for green biomass fuel production and fundamental insights into boron's role in enhancing deoxygenation performance.
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DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhengde Wang,Zhengfeng Zhang,Xingkai Zhang,Rupeng Li,Yunxia Wang,Jin Li,Bin Zhang
The LiCoO2 cathode cannot maintain stable battery cycling under high voltage, as the undesired release of lattice O and harmful surface side reactions compromise its structural stability, resulting in battery capacity degradation. Herein, inspired by architectural engineering, we proposed a surface–bulk structure dual-reinforced strategy to tackle the aforementioned challenges by room-temperature Al-induced engineering, which could achieve surface disordering and phosphating and bulk gradient Ni doping of the LiCoO2 cathode. Such a multifunctional structure could delay the detrimental transition, restrain lattice O loss, reduce harmful surface side reactions, and form a phosphate-rich CEI with high ionic conductivity and stability. The as-prepared modified LiCoO2 as the cathode in lithium-ion batteries displayed remarkably enhanced cycle stability than bare LiCoO2 (91.9% vs 45.3% after 100 cycles in 3.0–4.6 V at a current density of 1 C). Even at a 5 C high rate, the modified LiCoO2 cathode also displayed superb battery cycling (92% after 100 cycles at 3.0–4.6 V). This room-temperature Al-induced engineering is universal to other layered cathode materials.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）