JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Qin Jiao,Bingchuan Gao,Li Zhang,Mingjuan Han,Hui Wan,Guofeng Guan
In this study, lithium zirconate (Li 2 ZrO 3 )-based materials with varying Al doping levels were synthesized via an oxalic acid sol-gel method, and their CO 2 capture performance was evaluated in a high-temperature fixed-bed reactor. The findings revealed that the CO 2 capture performance improved notably, rising from 1.43 mmol/g to 2.05 mmol/g, as the Al doping concentration was elevated. Moreover, the Al-doped Li 2 ZrO 3 exhibited excellent cyclic stability, maintaining over 90% of its initial CO 2 capture capacity after 10 sorption/regeneration cycles at 600°C. The synthesized samples were systematically analyzed through multiple advanced characterization techniques. The findings confirmed that oxygen vacancies (OVs) generated during the Al 3+ -induced substitution of Zr 4+ not only enhance CO 2 chemical sorption but also accelerate surface reaction kinetics by facilitating the migration of oxygen ions and lithium cations during the carbonate formation stage. The kinetic fitting results indicated that the Avrami model could well describe the sorption process ( R 2 =0.9951). Reaction kinetic analysis revealed that indicated that the CO 2 sorption process was driven by a combination of physical sorption and chemical reaction mechanisms. This study provides important theoretical foundations and experimental support for the application of Li 2 ZrO 3 -based materials in carbon dioxide capture.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 12
·2125-2131
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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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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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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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RSC Advances
·
2019
·Vol. 9
·期 40
·23061-23070
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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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PubMed
高影响因子
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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ChemCatChem
·
2019
·Vol. 12
·期 5
·1376-1384
·
IF 4.495
Wen-Di Guo,Lei Liu,Shu-Qing Yang,Xiao-Chao Chen,Yong Lu,Giang VO-Thanh,Ye Liu
Graphical Synergetic catalysis : The one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . Via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. Tandem bis-alkoxycarbonylation of alkynes allows for the preparation of 2-substituted succinates from alkynes and nucleophile alcohol via two successive alkoxycarbonylation with advantages of 100 % atomic economy and simplified one-pot operation. Herein, the one-pot tandem bis-alkoxycarbonylation of alkynes was accomplished over the bi-functional catalytic system containing Xantphos-modified Pd-complex and Lewis super-acid of Al(OTf) 3 . It was found that, via the synergetic catalysis, the involved Xantphos-modified Pd-complex was responsible for the activation of CO and the alkynes through coordination to Pd-center while Al(OTf) 3 was in charge of the activation of the alcohol to facilitate the formation of [Pd−H] + active species. The in situ high-pressure FT-IR analysis, coupled with 1 H/ 13 C NMR spectral characterizations, confirmed that the introduced Al(OTf) 3 with intensive oxophilicity (via acid-base pair interaction) was able to activate nucleophilic MeOH to be a reliable proton-donor ( i. e . hydride-source) to warrant the formation and stability of [Pd−H] + species upon the oxidation of Pd 0 by H + (Pd 0 +H + →[Pd II −H] + ). Over the developed bi-functional catalytic system, the yields of the target diesters were obtained in the range of 36∼86 % in this sequence with the wide substrate scope.
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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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CHEMICAL ENGINEERING JOURNAL
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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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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Zizhao Fu,Jie Zhao,Rui Jiang,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
I-III-VI alloyed quantum dots (QDs) have shown great application potential in many fields. At present, Al-based alloyed QDs have become a kind of ideal material of the color conversion layer of WLEDs because of their blue-emission, abundant raw material content, and the strong stability of Aluminum oxides. In this study, we synthesized blue-emitting CuAlSe 2 /ZnSe QDs and dual-emitting CuAlGaSe/ZnSe QDs by using hot-injection and one-pot method respectively, with a photoluminescence quantum yield (PL QY) of 46.75% and 68.79%. Their spectral tuning effect and the luminescence mechanism were investigated and discussed by changing the elemental molar ratios and nucleation temperature. By changing the Cu/(Al+Ga) and Al/Ga molar ratio, the emission wavelength of CuAlGaSe/ZnSe QDs was adjustable from 456 nm to 631 nm, with the Al and Ga competition mechanism in CuAlGaSe/ZnSe was also proposed. Finally, a single-component dual-emission CuAlGaSe/ZnSe WLED with a color rendering index (Ra) of 91.4 was prepared. This work demonstrated the superior fluorescence performance of multi-component QDs and the potential application of Al-based QDs in WLEDs.
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Defence Technology
·
2025
·
IF 5.9
Xiandie Zhang,Zhijie Fan,Heng Xu,Jinbin Zou,Chongqing Deng,Xiang Zhou,Xiaode Guo
Al/NH 4 CoF 3 - Φ ( Φ = 0.5, 1.0, 1.5, 2.0 and 3.0) binary composites and Al-NH 4 CoF 3 @P(VDF-HFP) ternary composites are fabricated via ultrasonication-assisted blending and electrostatic spraying. The effect of equivalence ratio ( Φ ) on the reaction properties is systematically investigated in the binary Al/NH 4 CoF 3 system. For ternary systems, electrostatic spraying allows both components to be efficiently encapsulated by P(VDF-HFP) and to achieve structural stabilization and enhanced reactivity through synergistic interfacial interactions. Morphological analysis using SEM/TEM revealed that P(VDF-HFP) formed a protective layer on Al and NH 4 CoF 3 particles, improving dispersion, hydrophobicity (water contact angle increased by 80.5% compared to physically mixed composites) and corrosion resistance. Thermal decomposition of NH 4 CoF 3 occurred at 265 °C, releasing NH 3 and HF, which triggered exothermic reactions with Al. The ternary composites exhibited a narrowed main reaction temperature range and concentrated heat release, attributed to improved interfacial contact and polymer decomposition. Combustion tests demonstrated that Al-NH 4 CoF 3 @P(VDF-HFP) achieved self-sustaining combustion. In addition, a simple validation was done by replacing the Al component in the aluminium-containing propellant, demonstrating its potential application in the propellant field. This work establishes a novel strategy for designing stable, high-energy composites with potential applications in advanced propulsion systems.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Ran Ran,Wei Zhu,Guoliang Zhang,Lei Wang,Gongying Wang,Jie Li
The loaded acid–base bifunctional catalysts exhibit good catalytic performance in the synthesis of methyl methacrylate via aldol condensation of methyl propionate with formaldehyde, but they still suffer from deactivation caused by coke deposition. In this paper, coke deposition as well as consequential deactivation behavior of Cs/SiO2 catalyst loaded with various amounts of Al was investigated under different reactant compositions by using nuclear magnetic resonance, thermogravimetric, Brunauer–Emmett–Teller, and Raman analysis. As a result, coke on the catalyst was characterized by amorphous coke deposition, which was mainly composed of polycyclic aromatic hydrocarbons and aliphatic substances. Al added to the 10Cs/SiO2 catalyst significantly reduced the amount of coke deposition and inhibited the C/H ratio of coke. Appropriate amounts of Al and reactant compositions could ultimately increase the stability of the catalyst. Moreover, the kinetics of coke deposition observed on the Al–Cs/SiO2 catalyst was studied. It was found that the Voorhies equation modified using the variables of reaction temperature and reactants composition could accurately forecast coke accumulation on the 3.5Al-10Cs/SiO2 catalyst under specific conditions.
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