JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Mengjiao Yu,Xiong-Fei Zhang,Siting Yang,Yunhua Bai,Zhongguo Wang,Jianfeng Yao
Developing functional catalysts with both Lewis and Brønsted acid sites is an essential task for achieving the direct conversion of glucose to 5-hydroxymethylfurfural (5-HMF), a process that is crucial for the sustainable production of renewable fuels and chemicals. In this work, a mixed-linker strategy is proposed to prepare defective MIL-53(Al)-NH 2 by introducing trifluoroacetic acid into the MIL-53(Al)-NH 2 synthesis process. The creation of defects facilitates the exposure and accessibility of Al 3+ centers, as well as changes the coordination environment within the MIL-53(Al)-NH 2 skeleton. Both the number of Lewis and Brønsted acid sites are boosted, which is beneficial for glucose activation and 5-HMF generation. Through optimizing the reaction conditions, a glucose conversion of 98.3 % with a 5-HMF yield of 59.3 % was achieved by using defective 6d-MIL-53(Al)-NH 2 in a biphasic tetrahydrofuran/H 2 O NaCl system. Moreover, the 6d-MIL-53(Al)-NH 2 catalyst showed excellent recyclability and reusability, with its catalytic efficiency maintained almost unchanged for consecutive 10 cycles. The catalytic mechanism was elucidated and the acidity of the Lewis and Brønsted acid was modulated by defect engineering to achieve exceptional performance.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2025
·
IF 2.4
Ruiqi Huang,Zhaoyang Lu,Can Xu,Shuaiting Liang,Honglei Yuan,Geshan Zhang,Lihui Jia,Jun Yuan
Background Spent sulfidic caustic (SSC) from petrochemical and other chemical industries usually contains high concentrations of sulfur ion (S 2− ) and caustic soda (NaOH), which requires effective treatment. Here a CoPcSA/CaAl-LDHs catalyst was successfully synthesized by using a facile one-pot approach for loading cobalt phthalocyanine tetrasulfonamide (CoPcSA) on Ca–Al hydrotalcites (CaAl-LDHs). The material characterization included powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. Results The effect of various parameters such as reaction temperature, catalyst dosage and aeration rate on the catalytic activity was investigated and optimized to be 75 °C, 1.5 mmol L −1 and 2.5 L min −1 , respectively. CoPcSA/CaAl-LDHs shows very high catalytic efficiency for S 2− removal: a 95.0% S 2− removal can be achieved at extremely high concentration of S 2− (24 000 mg L −1 ). In addition, the catalyst exhibits high stability and reusability even after 8 cycles of reuse. Conclusion CoPcSA/CaAl-LDHs exhibits outstanding catalytic activity and stability, showing impressive potential in practical application. © 2025 Society of Chemical Industry (SCI).
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Yifan Wang,Tingjuan Wang,Xiaowen Wu,Jiancheng Wang,Endong Chang,Zhaohui Huang,Minghao Fang,Xin Min,Shiming Su
Forward osmosis membrane has shown great potential in the fields of seawater desalination and sewage treatment. However, the concentration polarization phenomenon and membrane fouling in the water treatment process greatly reduce the water treatment performance and restrict its application. To address these challenges, we employed a pre-buried seed-in-situ growth method to facilitate the Zn–Al layered double hydroxide (Zn–Al LDH) growth on the thin nanofiber membrane, and use it as the support layer for the preparation of a Zn–Al LDH modified forward osmosis membrane. Studies have shown that the introduction of Zn–Al LDH significantly improves the water treatment efficiency of the forward osmosis membrane (In Al-DS mode, the water flux increased by 87.5 %, up to 50.50 LMH, with a low specific salt flux of 0.13 g L −1 ). It also exhibits exceptional antibacterial, anti-membrane fouling, and photocatalytic degradation properties. This research presents a novel approach for the development of advanced high-efficiency forward osmosis membranes.
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FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
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2024
·Vol. 47
·期 8
·2905-2921
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IF 3.1
Siran Wang,Zhangcheng Yin,Xudong Rong,Haipeng Song,Xudong Yang,Naiqin Zhao
The unsatisfactory fatigue performance of Al foams significantly limits their engineering applications. Meanwhile, the unique pore structure of metal foams makes it still challenging to assess its fatigue. Herein, we report an innovative strategy for preparing carbon nanotubes reinforced Al-Cu-Mg (CNTs/Al-Cu-Mg) composite foams, which exhibit superior compressive strength (16.17 MPa) and fatigue strength (11.17 MPa). Statistics analysis confirms that the fatigue life ( N f ) follows Weibull distribution, and P-S-N curves were obtained to calculate the theoretical stress level required to achieve the expected N f . Moreover, computer vision is utilized to monitor the fatigue deformation process and effectively detect fatigue crack initiation sites. Notably, the accuracy of predicted N f obtained by this method is exceptionally high (98.32%). This work provides a theoretical and practical basis for designing metal foams with superior fatigue properties and offers a promising bottom-up tactic for predicting the N f of metal foams to prevent fatigue failure. Highlights The CNTs/Al-Cu-Mg composite foams possess the superior fatigue strength of 11.17 MPa. The application of computer vision enables the accurate monitoring of FCIS. A novel exploration into the fatigue assessment of metal foams is developed.
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高影响因子
COMPOSITES COMMUNICATIONS
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2024
·
IF 6.5
Xinyue Yang,Yong Li,Deyun Yue,Rui Li,Haojie Song
The construction of ternary heterojunction photocatalysts can achieve multi-gradient transfer of charges and accurate control the position of photogenerated electrons which has received increasing attention. In this paper, NH 2 -MIL-53(Al)@BiOBr@CQDs-10 % (ABCQDs-10 %) was prepared via a facile hydrothermal and chemical synthesis processes. Three-dimensional serration of NH 2 -MIL-53(Al) as a platform for irregular BiOBr nanosheets, CQDs promote interfacial contact and act as electron transport channels between BiOBr and NH 2 -MIL-53(Al) and constitute Z-type heterojunctions with high redox properties. ABCQDs-10 % shows the best photocatalytic removal efficiency (94.24 %) of CIP, the reaction rate constants (0.045 min −1 ) were 1.2 and 64 times higher than BiOBr and NH 2 -MIL-53(Al), respectively. The excellent degradation performance is attributed to the construction of Z-type heterojunction of NH 2 -MIL-53(Al)@BiOBr@CQDs which improve electron-hole separation and transfer efficiency. The main active species was •O 2 - . The photocatalytic activity of ABCQDs-10 % had not obvious loss after cycle experiments and the crystal structure had no significant changes, means high stable photocatalytic activity.
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Materials Today Communications
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2024
·
IF 3.7
Pu Zhao,Zhengwei Li,Zhiwu Xu,Xuesong Liu,Jiuchun Yan
How to obtain a high-strength and corrosion resistance of Al/Sn/Al joint has been a longstanding goal for electronics industry. In this work, 6063Al was joined in the air by ultrasonic-assisted liquid phase diffusion bonding using a Sn filler metal . It was performed by applying an uninterrupted ultrasonic vibration at a heating temperature of 360 ℃, final obtaining a 6063Al joint without enriched-Sn. Under the action of ultrasonic vibrating, the breaking of oxide film , the diffusing of Sn, and dissolving of Al alloy occurred in sequence. It resulted in a transition of bonding interface from Sn/Al to an α-Al/α-Al bonding interface embedded a few Mg 2 Sn partials, after depleting Sn by grain boundary diffusion . The joints possessed a high strength coefficient of 86.7% of 6063Al base metal and 161.8% of soldering joint. The joint had a better corrosion resistance that the tensile strength only reduced 35.3% after a corroding of 72 h in 3.5 wt% NaCl solution in comparison with the soldering joints. Finally, the evolution of the interface structure and mechanism of improving corrosion resistance were discussed in detail. It is a promising technology for manufacturing high-reliable Al/Sn heterogeneous joints.
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LANGMUIR
·
2024
·
IF 3.7
Yinyin Peng,Ting Pan,Chuang Chen,Yuchen Zhang,Guoyuan Yuan,Derong Liu,Xiaoqin Pu,Wei Xiong
In this study, researchers developed a novel composite material called NH2-MIL-53-Al/PAN, which consists of metal–organic frameworks (MOFs) grown on electrospun PAN nanofibers (NFs). The successful formation of the composite was confirmed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR), and the hydrophilicity of NH2-MIL-53-Al/PAN was demonstrated by the water contact angle (WCA). Batch experiments were conducted to investigate the adsorption performance of Co(II) under different conditions. The maximum adsorption capacity reached 58.72 mg/g, and almost 95% of the adsorption was achieved within the first 6 h. The adsorption process was found to be spontaneous and endothermic and followed the pseudo-second-order kinetics and Langmuir models. Chemisorption and molecular layer adsorption are the main mechanisms of adsorption, and X-ray photoelectron spectroscopy (XPS) analysis further reveals that the interaction between the adsorbent and cobalt is a coordination interaction. In this study, NH2-MIL-53-Al was grown in situ on PAN to ensure effective loading of MOFs and prevent agglomeration during the NF mixing process. This approach successfully addressed the challenge of exposing active sites within the embedded MOF crystals. Additionally, it overcame the difficulty of recycling traditional MOF adsorbents. As a result, the exceptional performance of MOF NFs offers a promising solution for the efficient removal of cobalt-containing wastewater.
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PubMed
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Jun Zhang,Yimeng Cao,Fang Chen,Mengdie Cai,Jia-qi Bai,Jiawei Xue,Jingshuai Chen,Chang-Jie Mao,Song Sun
Cocatalysts play a pivotal role in enhancing the efficiency of photocatalytic water splitting. In this study, we introduced a novel and straightforward pre-impregnation strategy to anchor a CuNi dual cocatalyst onto the surface of Al-doped SrTiO 3 (Al-STO), coupled with photodeposition. This approach led to a remarkable 11.07-fold (77.5 µmol/h) increase in hydrogen evolution performance compared to the conventional photodeposition method for decorating with CuNi dual cocatalysts. Not only that, after the 18 h cycle experiment, the catalyst still maintains high activity and high stability similar to that of precious metals, which overcomes the defects of poor stability and short life of non-precious metals. This strategy capitalizes on the pre-adsorption of cocatalyst precursor ions on the Al-STO support via impregnation, enhancing both the adsorption energy and capacity between the precursor ions and the active sites. Detailed characterizations have revealed a strong electronic interaction within the Cu-Ni structure and improved interfacial coupling between CuNi and Al-STO. This not only significantly promotes charge separation and transfer but also provides a plethora of active sites for the photocatalytic generation of H 2 . Moreover, extensive theoretical calculations have provided deep insights into the reaction mechanism of the CuNi system and elucidated the reasons behind the varying degrees of activity enhancement across different cocatalyst architectural systems.
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ENERGY & FUELS
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2025
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IF 5.3
Jiapeng Lu,Chen Yan,Xin Min,Yangai Liu,Ruiyu Mi,Xiaowen Wu,Wei Wang,Zhaohui Huang,Minghao Fang
Nickel-rich layered LiNi0.8Co0.1Mn0.1O2 holds significant potential as a commercially viable cathode material. However, its widespread application is still hindered by inherent challenges, including poor structural stability, cycling performance, and rate capability. This study presents an Nb/Al codoped Li(Ni0.8Co0.1Mn0.1)0.98Nb0.01Al0.01O2 single-crystal ternary cathode material developed to overcome these challenges. The Nb and Al dopants are uniformly distributed throughout the material, resulting in the formation of an α-LiAlO2 protective layer on the surface. This protective layer effectively reduces electrolyte degradation and facilitates Li+ diffusion. Additionally, some of the TM-O bonds are replaced by Nb–O and Al–O bonds, which minimizes the intermixing of Li+ and Ni2+, thus improving the stability of the layered structure. The Nb/Al codoped nickel-rich single-crystal ternary cathode material exhibits superior cycling stability and rate performance compared to the undoped material. After 200 cycles at 1 C within the voltage window of 2.75–4.5 V, the NA-SNCM delivers a specific capacity retention rate of 76.11% (133.65 mA h g–1). Notably, the undoped counterpart displays severe microcracking, whereas the doped samples maintain intact crystallinity.
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Optical Materials Express
·
2024
·Vol. 14
·期 6
·1531-1546
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IF 2.8
Zhenghao Li,Zhenghao Li,Xin Li,Yan Sun,Yan Sun,Chongyun Shao,Wei Chen,Wei Chen,Xin Wang,Chunlei Yu,Lili Hu,Malgorzata Guzik,Georges Boulon
To develop Dy doped silica glass with a higher irradiation resistance, which can be adapted to high power violet or blue LD pumped yellow laser fibers, the designed Dy-Al-Ce codoped silica glasses, 0.05Dy2O3-1.5Al2O3-xCe2O3-(98.45-x)SiO2 (x = 0, 0.05, 0.1, 0.25, 0.5), were prepared by the sol-gel method. Their excitation spectra, emission spectra and emission decay curves associated with the yellow emission from 4F9/2 to 6H13/2 of Dy were determined before and after the X-ray irradiation of 1000 Gy. The relation between these spectra and Ce-codoping concentrations is discussed, including the sensitization from Ce to Dy, the reverse energy transfer from Dy to Ce, and especially the X-ray-induced photodarkening, which is detrimental to the 576 nm yellow emission of Dy. The centers that cause the photodarkening are analyzed by electron paramagnetic resonance and radiation induced absorption spectra. It is found that Ce can effectively suppress the Al-oxygen hole center induced by the X-ray across the entire concentration range of Ce-codoping, but a new photodarkening center is generated at higher concentrations of Ce-codoping. Finally, the optimized Ce-codoping concentration of ∼0.1 mol% is used to achieve a promising yellow laser glass of Dy-Al-Ce codoped silica with enhanced irradiation resistance, resulting in its X-ray-induced photodarkening that is only 6% - 14% of that in the Ce-undoped.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2024
·
IF 4
Shumin Lin,Xiaoyu Zhang,Xiliang Li,Shu-xuan Liang
Residues of fluoroquinolones (FQs) have been identified as a threat to food safety, highlighting the need for effective detection methods in food samples. This study utilized a hydrothermal synthesis method to create Al-based metal-organic framework (Al-MOF) for pipette-tip solid-phase extraction of FQs in food matrices. Coupled with HPLC-FLD, a novel sample pretreatment method for simultaneous detection of three FQs was developed, demonstrating good linearity (1−500 ng/g) with R 2 values ranging from 0.9990 to 0.9998. Limits of detection and quantification were found to be 0.15−0.25 ng/g and 1.0−2.0 ng/g, respectively, with the relative standard deviations below 9.3 %. The extraction method showed promising results in animal liver and kidney samples, with a recovery rate of 75.2−103.6 %. Overall, this simple, rapid, and efficient method offers a valuable approach for analyzing trace levels of FQs in complex matrices.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiandie Zhang,Linfeng Yue,Heng Xu,Haozhe Li,Jiaming Liu,Xiang Zhou,Xiaode Guo
The study employed a two-step synthesis method to prepare Al@PFHP@fluoropolymer energetic composites with a core–shell structure. PFHP and HF acid are used for surface etching and modification of raw Al powder. PFHP bonds to the surface of Al powder, with redundant C-F providing hydrogen bonding sites, driving dissolved PVDF and P(VDF-HFP) polymer chains in the liquid phase to migrate, nucleate, and grow on the surface of the Al powder, and consequently the formation of a continuous shell layer through hydrogen-bonding self-assembly. The Al powder coated with fluoropolymer exhibited strong hydrophobic and corrosion-resistant properties, ensuring long-term storage and environmental adaptability. Compared to mechanically mixed Al@PFHP/fluoropolymer, the Al@PFHP@fluoropolymer composites show significant improvements in thermal reactivity, ignition, and combustion performance. The close integration of fluoropolymer and Al shortens the mass and heat transfer distances during the reaction process. Additionally, the low-boiling-point AlF 3 does not hinder diffusion process in the combustion zone, which is conducive to the alleviation of the reaction sintering phenomenon and the rapid and concentrated release of energy. Therefore, through the dual strategy of using fluorine-containing oxidizers and structure optimization, efficient reaction of Al@PFHP@fluoropolymer is achieved, also promoting efficient combustion of Al powder. The synthesis process of this energetic composite is simple yet yields exceptionally high performance, enabling large-scale production and application potential in military ammunition and rocket propulsion systems.
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