ChemCatChem
·
2025
·
IF 3.9
Zhouxiao Zhai,Jingce Bi,Yi Wang,Ningning Liu,Linshan Wang,Xia Zhang,Zhuopeng Wang,Yide Han
Graphical In this work, a mesoporous molecular sieve with graphite carbon-coated Co NPs (Co@CN/Al-MCM-41) was successfully synthesized by vacuum-injecting the precursor solution into the MCM-41 molecular sieve and subsequent calcination. Experimental results demonstrate that Co@CN/Al0.1-MCM-41 exhibits excellent catalytic performance in the hydrogenation of FF. Its excellent catalytic performance is primarily attributed to the interaction between Co species and Al species of MCM-41, including the reduction effect, electron transfer, and enhancement of acid density. The catalytic hydrogenation of furfural (FF) to furfuryl alcohol (FOL) using metal-loaded mesoporous molecular sieves represents a significant research area. In this work, a mesoporous molecular sieve with graphite carbon-coated Co NPs (Co@CN/Al-MCM-41) was successfully synthesized by vacuum-injecting the precursor solution into the MCM-41 molecular sieve and subsequent calcination. Using Co@CN/Al 0.1 -MCM-41 as the catalyst, the selective hydrogenation of FF to FOL achieved a conversion rate of 91.2% under mild conditions at 120 °C, which is 2.85 times higher than that of Al-free Co@CN/MCM-41, with an FOL selectivity of 97.2%. The experimental results revealed a strong correlation between FF conversion and the Si/Al ratio of MCM-41 molecular sieve. Increasing the Al species content facilitated the formation of more Co NPs active sites because of the strong electrostatic interaction, thereby promoting the activation of FF and hydrogen and enhancing the catalytic activity of Co@CN/Al 0.1 -MCM-41. Additionally, Co@CN/Al 0.1 -MCM-41also exhibited stable performance over five consecutive cycles, which was attributed to the formation of graphite carbon-coated Co NPs structure during the synthesis process. This simple fabrication strategy provides a novel approach for the modification of mesoporous molecular sieves with excellent catalytic activities.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Shiyuan Wang,Peiya Li,Shuhan Lu,Bo Wang,Qinchuan Shi,Jiahui Wang,Fusheng Yang,Bin Wang,Tao Fang
Developing both high-performance and cost-effective hydrogenation catalysts is of strategic importance for advancing the industrialization of liquid organic hydrogen carrier (LOHC) technology. Herein, a series of Ni-based catalysts supported on Ni/Al mixed metal oxides (Ni/NiAl-MMO) are prepared by in-situ topotactic transformation of NiAl-LDH precursors. The synergistic enhancement mechanism, which is regulated by the Ni–Al interfacial interactions and the anchoring effect of precursors, is systematically investigated with respect to the influence on the size and electronic structure of active metal nanoparticles, as well as on the catalytic performance in N-ethylcarbazole (NEC) hydrogenation. The results show that the optimized Ni/Ni 1 Al 2 -MMO-500 catalyst achieved both small size and high electron density of active metal particles. The synergistic size and electronic enhancement endow the catalyst with superior catalytic activity in NEC hydrogenation, exceeding all reported Ni-based catalysts and exhibiting catalytic efficiency comparable to that of the widely used commercial precious metal hydrogenation catalyst, 5 wt% Ru/Al 2 O 3 , with high catalytic performance sustained across five NEC hydrogenation cycles.
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Haiqing Liu,Muhammad Jawad,Jingmao Zhao,Baomin Fan,Mohammad Tabish,Muhammad Mubeen,Mubashar Mahmood,Jingbao Wang
Under-film filiform corrosion (FFC) poses a significant challenge to the durability and reliability of Zn–Al–Mg-coated steel (ZM-steel), necessitating the development of advanced protective strategies. Herein, benzotriazole 5-carboxylic acid (BTC)-modified titanium zirconium (TiZr) conversion coatings (CCs) were developed as a sustainable solution to mitigate FFC, enhance corrosion resistance, and improve the adhesion of epoxy (EP) coatings on ZM-steel. Through electrochemical impedance spectroscopy, potentiodynamic polarization, FFC, and neutral salt spray (NSS) tests, the optimized BTC-TiZr CC, prepared in a Ti–Zr solution containing 0.5 g/L BTC, a treatment temperature of 25 °C, and a short immersion duration of 120 s, exhibited superior corrosion resistance, robust adhesion strength, and exceptional FFC inhibition. Metal–organic complexes (MOCs) of Ti/Zr/Zn with BTC were identified alongside mixed Ti/Zr/Zn/Al/Mg oxides and fluorides within the BTC-TiZr CC. BTC not only exerted strong corrosion inhibition efficacy for ZM-steel but also facilitated the formation of MOCs with metal ions in TiZr conversion solutions (CSs). Density functional theory calculations revealed that BTC preferentially adsorbs onto the MgZn2 phase, effectively suppressing its dissolution within the ZM layer. These findings establish BTC-TiZr CCs as a promising, environmentally friendly solution for advanced corrosion protection of ZM-steel, especially FFC suppression.
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DOI
PubMed
高影响因子
Corrosion Communications
·
2025
·
IF 9.5
Chao Yang,Tao Ying,Aihui Huang,Jian Huang,Pinghu Chen,Paul K. Chu,Xiaoqin Zeng
Corrosion of aluminum (Al) alloys during service limits many applications. Micro-arc oxidation (MAO) coatings can enhance corrosion resistance, but porous defects in the films undermine their effectiveness. Here, by mixing a phosphate electrolyte with soluble Zn and Ce salts, zinc phosphate and cerium phosphate co-doped MAO corrosion-resistant coating is prepared on Al alloy LY12. Zinc phosphate and cerium phosphate are incorporated in situ to form an amorphous encapsulated nanocrystalline structure. During long-term corrosion, Zn 2+ is released and deposited as corrosion products Zn(OH) 2 to cover weak corrosion micro-regions in the coating. Simultaneously, Ce 3+ released from MAO coating co-doped with zinc phosphate/cerium phosphate forms Zn(OH) 2 /Ce(OH) 3 due to the small solubility product K sp to further enhance corrosion resistance. Compared to pristine Al alloy, corrosion potential increases from -1.306 to -0.819 V SCE , and corrosion current density decreases by 4 orders of magnitude from 2.6 × 10 −6 to 2.5 × 10 −10 A·cm −2 . Co-doped MAO coating significantly enhances corrosion resistance of Al alloy LY12 and shows great potential for a wide range of applications.
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高影响因子
COMBUSTION AND FLAME
·
2025
·
IF 6.2
Xiandie Zhang,Haozhe Li,Xuxu Cui,Xinwen Ma,Jiaming Liu,Xiaode Guo,Xiang Zhou
The passivation layer of Al powder hinders the mass transfer during Al combustion. Fluorinated oxidants, such as metal fluorides and fluoropolymers, substantially improve the combustion behaviour of Al powder. Herein, a simple solvothermal method is employed to produce a high-entropy acicular accumulational fluorine-containing oxidiser based on ammonium fluoroferrates. The characterization results indicate that heating the fluorine-containing oxidiser can release gaseous products of HF and NH 3 . HF etches the passivation layer, and NH 3 provides kinetic energy to the fuel, resulting in multiple hot spots and secondary combustion as well as prevention of reaction sintering. Compared with traditional FeF 3 , this novel fluorine-containing oxidiser considerably improves the combustion of Al powder by reducing its onset temperature as well as increasing its exothermic enthalpy, flame area and F release ability.
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高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 5
·056519
·
IF 1.62
Yanqing Xue,Qitang Hao,Bo Li,Xinliang Wang,Chengze Yin,Han Zhang
To surmount the longstanding puzzle of strength-ductility trade-off, efforts had been made to apply Mg - Ag microalloying on 5%TiB2/Al-4.5%Cu composites by in situ molten salt reaction and subsequent heat treatment. The obtained composites achieve an eye-catching tensile elongation (δ) of 6.1 ± 0.4%, while maintaining elevated ultimate tensile strength (UTS) of 497 ± 4 MPa and yield strength (YS) of 401 ± 3MPa. Comprehensive characterization demonstrated that the uniformly distributed TiB2 particles together with semi-coherent grain boundaries between the α-Al matrix and reinforcement phase (TiB2 particles, Ω-Al2Cu, σ-Al5Cu6Mg2) facilitated the dislocation motion integrally, which eliminated the stress concentrations, may be the main reason for amelioration in the strength-ductility trade-off of the composites when subject to rigorous multi-step heat treatment.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 11
·6577-6585
·
IF 3.9
Yuting Zhang,Huan Tu,Guoying Zhao,Jingshan Hou,Yufeng Liu,Xin Qiao,Zhongzhi Wang,Bo Li,Ji-Guang Li,Feng Wang,Yongzheng Fang
Compared with other fluorescent crystal phases, garnet has better structural stability in a glass matrix and renders precisely controllable emissions due to the abundant lattice control positions. In this work, we regulate the coordination field of Ce 3+ ion based on the co-substitution method and achieve the spectra regulation in the yellow–green range. We used Ba 2+ –Si 4+ cations to replace Y 3+ –Al 3+ cations in Y 3 Al 5 O 12 (YAG) matrix to obtain blue-shift of the emission peak from 552 to 539 nm. The centroid shift and crystal field splitting decrease with the decreasing covalency of the bond between the Ce 3+ ion and the surrounding anions owing to the higher electronegativity of Si 4+ ions than Al 3+ ions. The corresponding fluorescent films were prepared by a low-temperature co-sintering process based on the as-made Ba 2+ –Si 4+ co-substituted phosphor. X-ray powder diffractometer and scanning electron microscopy images showed that the fluorescence crystals were less eroded and evenly dispersed in the glass matrix. Spectral analysis showed that the garnet phase was protected by using lead-free borosilicate glass with a low melting point, and the quantum efficiency of phosphor-in-glass (PiG) retains 98% of the corresponding phosphor. By adjusting the ratio of garnet phosphor to commercial red nitride phosphors, a warm white fluorescence with a color rendering index of 80.3 and color temperature of 3899 K was obtained. The prepared warm white film has potential application value in the whole spectra field.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Dezhi Qin,Guangrui Yang,Li Zhang
The Al-doped Fe 3 O 4 /hydroxyapatite (HAP) nanocomposites prepared in pectin matrix was employed as adsorbent that offers high adsorption capacity for fluoride, magnetic separability and good stability. Powder X-ray diffraction and transmission electron microscopy characterizations were used to determine the structure and morphology of as-prepared samples. The needle-like Al-doped Fe 3 O 4 /HAP nanocrystals were coated with pectin molecules, which not only induced the nucleation, but inhibited the further growth of nanocrystals. The results of thermogravimetric analysis and Fourier transform infrared spectra showed that the obtained products are organic–inorganic nanocomposites; and the Al doping in composites increased the amount of hydroxyl groups, which could supply more adsorption sites for fluoride. In bath experiments, the adsorption capacity of Al-doped samples was significantly higher than that of pure HAP due to the high affinity of aluminium toward fluoride. The effect of reaction parameters such as pH, calcination temperature, co-existing anions and Al/Ca molar ratio on the adsorption capacity was also investigated to determine optimum adsorption condition. The Al-doped Fe 3 O 4 /HAP nanocrystals exhibited high adsorption rate for fluoride during the first 30 min and reached equilibrium within 80 min. The adsorption kinetics and isotherms were well-fitted by the pseudo-second-order kinetic model and the Freundlich isotherm model, respectively. In addition, the adsorption mechanism of fluoride on Al-doped Fe 3 O 4 /HAP nanocomposites was investigated, which can be mainly attributed to electrostatic attraction and ion-exchange.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 11
·117501
·
IF 4.386
Zhenhua Liu,Qiangbing Liu,Dan Liao,Jingang Yu,Xinyu Jiang
We have developed a Ni-Al layered double hydroxide (LDH) and carbon black (CB) composite for the selective electrochemical detection of hydroquinone (HQ) and catechol (CT). LDH exhibits multiple active sites and high adsorption capacity for phenolic substances. CB demonstrates high conductivity and electrocatalytic capacity. The crystal structure was characterized by X-ray diffraction, establishing the successful synthesis of flower-like LDH, and the successful combination of LDH and CB. Fourier-transform infrared spectroscopy confirmed that the LDH surface contained sufficient hydroxyl groups to adsorb CT and HQ. The morphology of LDH/CB was characterized by scanning electron microscopy, and the composition and valence confirmed by X-ray photoelectron spectroscopy. The LDH/CB sensor delivered excellent performance in terms of sensing HQ and CT, with a wide detection range (0.1–150 μM) and detection limits of 0.011 and 0.0091 μM (DL = 3.3σ/S), respectively. The excellent performance of this sensor makes it a reliable choice for detecting HQ and CT in water.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2017
·Vol. 164
·期 13
·A3292
·
IF 3.259
Jiguo Tu,Shubo Wang,Shijie Li,Chen Wang,Dongbai Sun,Shuqiang Jiao
The need of an efficient and sustainable way to store energy is an urgent necessity. Unfortunately, due to the cost and limited resources of lithium, the use of the most mature Li-ion batteries for grid-scale storage of renewable energy production is nowadays going on slowly. Here, a low-cost, high-capacity Al/graphite rechargeable aluminum battery was explored based on molten AlCl3-NaCl liquid electrolyte. The battery shows a specific capacity of above 200 mAh g−1 at a current density of 100 mA g−1, even maintaining at 111.4 mAh g−1 at a higher current density of 1000 mA g−1 over 1000 cycles, with a Coulombic efficiency of 94.6%. Raman spectroscopy and X-ray photoelectron spectroscopy reveal that AlCl4− and Al2Cl7− anions are intercalated between graphite layers at the graphitic carbon cathode, meanwhile Al2Cl7− anions are transformed into metallic Al and AlCl4− anions at the Al anode. The inherent low-cost and low-flammability, as well as the most outstanding high capacity, long-term cycling stability and Coulombic efficiency, are particularly favorable for grid-scale storage of renewable energy.
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高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Xiaoyue Yue,Zijun Zhou,Min Li,Mingsha Jie,Baocheng Xu,Yanhong Bai
Developing highly sensitive and visual methods for rapid detection of antibiotics is significant to ensure food quality and safety. To meet the requirement of nitrofuran antibiotics detection, luminescent fusiform Al(III)-containing metal–organic frameworks (Al-MOF) nanosheets were successfully synthesized by one-step hydrothermal method. And then, the nanosheet served as a fluorescent probe to detect nitrofuran via the inner-filter effect mechanism. The developed sensor allowed sensitive and selective detection of nitrofuran with good linear relationships. And, the detection limit (LOD) values were estimated to be 0.53, 0.838 and 0.583 μM for nitrofurazone, nitrofurantoin and furazolidone detection, respectively. The practical application of the proposed system was verified by HPLC in spiked milk samples with satisfying recoveries ranging from 88.14 to 126.21% and low relative standard deviations of 2.85 ~ 8.13%. Moreover, we designed fluorescent test papers for semi-quantitative detection of nitrofuran via naked-eye colorimetric assay. The established method provides an alternative strategy for semiquantitative detection of nitrofuran.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lanlan Guo,Yanji Feng,Feng Shi,Wei Zhao,Hua Zeng,Tingyu Chen,Yingli Yang,Guodong Wang,Xiaolian Liu,Yan Wang,Xueli Yang
In this work, pure NiO, Al-doped NiO, W-doped NiO and a series of Al/W co-doped NiO nanoflowers were successfully prepared through a simple solvothermal method . Various characterization methods, such as XRD , SEM, TEM, HRTEM and XPS , were used to confirm the physical and chemical properties of the sensitive materials in terms of micro-nano structures, compositions and elemental distributions. The as-obtained Al/W co-doped NiO showed a nanoflower structure with an approximate size of ∼ 200 nm. What's more, among six sensors constructed from the sensitive materials, the sensor based on 3 at% Al 3+ /3 at% W 6+ co-doped NiO (3Al3W-NiO) achieved the highest response (R g /R a =112) toward 100 ppm triethylamine with a low detection limit (1 ppm) at 325 ℃. Besides, this sensor also exhibited excellent response/recovery characteristics and long-term stability. These favorable sensing performances of the 3Al/3 W co-doped NiO sensor are not only modulated by the initial resistance (R a ), but are also closely related to the large specific surface area , porous structures , low crystallinity , rich oxygen vacancies and high Ni 3+ /Ni 2+ ratio in the composite nanomaterials.
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高影响因子
危险品化学品经营许可证（带存储）