CONSTRUCTION AND BUILDING MATERIALS
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2018
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IF 3.485
Lei Cao,Jintang Guo,Jianhua Tian,Yang Xu,Miaomiao Hu,Meiyu Wang,Jinjie Fan
Ca/Al-Layered Double Hydroxide (Ca/Al-LDH), was a kind of important anionic clays with broad applications owing to its properties of exchangeable anion and adjustable particle size. In this study, Ca/Al-LDH had been successfully prepared by co-precipitation method, and it was found that the particle size, crystallinity and morphology of Ca/Al-LDH could be tuned via changing ethanol/water ratio of solution. More interestingly, with the increase of the Ca/Al-LDH’s dosage, the different crystal structure of Ca/Al-LDH had promoting effect on the development of the early strength of the cement slurries, however, the change trend of the strength growth rate of various kinds of cement slurries were quite different. Meanwhile, experimental results disclosed that the crystallinity and particle size of Ca/Al-LDH determined its interaction with cement hydration particles. That was likely to lead to a change in tricalcium silicate (C 3 S) and tricalcium aluminate (C 3 A) hydration process of accelerating or retarding under the different Ca/Al-LDH content, thus enabling the early strength development of slurry to exhibit different trends. And this finding could provide further interpretation for the effect of hydrotalcite-like materials on cement hydration process and offer a theoretical exploration for its practical application in the future.
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CATALYSIS TODAY
·
2020
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IF 5.825
Jinfeng Han,Caixia Liu,Qingling Liu,Shuangchun Lu,Yalian Bi,Xiaohan Wang,Mingyu Guo,Chunfeng Song,Na Ji,Xuebin Lu,Degang Ma,Zhenguo Li
Novel Al-rich OFF-CHA twin-crystal zeolite was synthesized by one-pot hydrothermal method, and applied in ammonia-selective catalytic reduction (NH 3 -SCR) after copper ion exchange. Results indicated that Cu content in Cu-OFF-CHA played a significant role in NH 3 -SCR reaction. The insufficiency of copper activity sites and the formation of CuOx were the main reasons affecting low and high temperature SCR activity of catalyst, respectively. Cu 3.1 -OFF-CHA, with the optimal copper content, demonstrated over 90 % NOx conversion and exhibited excellent N 2 selectivity in the range from 160 to 550 ℃. Further research verified that the SCR activity of Cu 3.1 -OFF-CHA maintained above 80 % in the temperature range from 180–450 °C after hydrothermal treatment 16 h. The reason might be that Cu 2+ in Cu-OFF-CHA was migrated from CHA to OFF sites after hydrothermal treatment, and Cu 2+ in OFF sites on Cu-OFF-CHA was more stable, resulting in less conversion of the active site to CuOx clusters. Cu-OFF-CHA has the potential to be applied in SCR after-treatment systems of diesel exhaust due to the excellent SCR activity and hydrothermal stability.
研究领域:
催化化学
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环境化学
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材料科学
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化学工程
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PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Jie Liu,Fu Xia,Nan Zheng,Changming Zhang,Zehua Xu,Wanbin Zhang,Jia He,Guoxian Zhang,Wenge Li,Qiang He
In response to the prevailing challenges of the inherent trade-off between anti-icing performance and optical transparency, as well as poor environmental durability in anti-icing coatings, this study presents a multifunctional biomimetic coating that integrates efficient passive anti-icing capability, superior durability, and high optical transmittance. A UV-curable fluorinated polysiloxane/polyurea (FPSU) resin was synthesized, serving as the polymer matrix. Al₂O₃ microspheres were incorporated onto the surface via a spray-coating approach, with simultaneous resin crosslinking and robust anchoring of microstructures achieved through in situ UV curing, thereby enabling the successful fabrication of a biomimetic anti-icing coating of FPSUA imitating the surface of rose petals. The FPSUA coating achieves a static water contact angle of 158.22° and a sliding angle of 5.45°. On glass substrates, the freezing time increases from 25 s in the uncoated state to 618 s after FPSUA coating application, while the ice adhesion strength drops sharply from 357.96 kPa to 18.94 kPa. After rigorous exposure to sand impact, sandpaper abrasion, alcoholysis, and freeze-thaw cycles, the static contact angle remains above 150°, and the sliding angle stays below 11.49°. The FPSUA coating exhibits a refractive index of 1.432 and a transmittance of 80.32% at 589 nm. The FPSUA biomimetic anti-icing coating shows significant potential for anti−/de-icing applications in critical transparent components such as aircraft windshields, UAV sensor windows, and solar panels.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Bing Liu,Hong Yang,Jinbin Xu,Minxue Deng,Yongbo Xiong,Sihui Wu,Zhanwang Li,Yuncong Xu,Mingyue Wang,Wenfeng Han
Stabilizing metastable active centers under harsh reaction conditions represents a significant challenge in heterogeneous catalysis. The F-Al-O species exhibits excellent catalytic activity for the gas-phase dehydrofluorination of potent greenhouse gas hydrofluorocarbons (HFCs) to produce hydrofluoroolefins (HFOs). However, this species is prone to transform into the F-Al-F configuration via excessive fluorination, subsequently leading to catalyst deactivation because of coke deposition. To address this issue, we present a viable strategy for stabilizing the metastable active centers. Al 2 O 3 doped with boron (B), phosphorus (P), and sulfur (S) was synthesized via the sol-gel method. Results demonstrate that in the dehydrofluorination of HFC-245fa, the phosphorus-doped Al 2 O 3 catalyst (P-Al 2 O 3 ) outperforms its boron- and sulfur-doped counterparts, achieving a conversion of 87% compared to 68% and 49%, respectively. The incorporation of P significantly alters the coordination environment of Al 3 + within the Al 2 O 3 lattice, forming O-Al-O-P bonding configurations. During the subsequent dehydrofluorination reaction, these structures undergo fluorination to yield HF-resistant F-Al-O-P species. This process effectively impedes the deep fluorination of Al 2 O 3 into AlF 3 , thereby stabilizing the metastable F-Al-O active centers. Furthermore, this anti-fluorination mechanism significantly suppresses catalyst coking and prevents pore structure collapse. In the dehydrofluorination of HFC-245fa to HFO-1234ze, the P-Al 2 O 3 catalyst achieved a high conversion of 87%, representing an approximately threefold enhancement over conventional Al 2 O 3 , and no significant deactivation trend was observed after 500 h of reaction. This work provides a fundamental understanding of stabilizing metastable active centers and paves a practical pathway for designing robust catalysts for reactions under corrosive atmospheres.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2023
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IF 8.7
Xudong Rong,Xiaofeng Chen,Dongdong Zhao,Xiang Zhang,Chunnian He,Chunsheng Shi,Naiqin Zhao
In this work, we develop a novel strategy to simultaneously manipulate robust “Al-Al 2 O 3 -CNTs” interface and intragranular nano-sized Al 2 O 3 whiskers and CuAl 2 particles in the Cu 2 O@CNTs/Al composite via combining surface modification strategy with interfacial thermite reaction, which contributes to the superior mechanical properties . It was demonstrated that the interfacial thermite reaction between Cu 2 O and Al would effectively promote the formation of Al 2 O 3 nanolayer at CNTs-Al interface, thus emphasizing to address the enhanced load transfer and interfacial plastic stability. Further, the long-distance diffusion of Cu and O atoms imposed by the intense thermal effect facilitates the in-situ generation of intragranular Al 2 O 3 /Al 2 Cu with good interface compatibility. These intragranular reinforcements could render sustainable strain hardening by trapping dislocation loops. Such interfacial thermite reaction-induced intragranular reinforcements and strong interfacial adhesion are supposed to provide a new perspective for achieving strength-ductility synergy in CNTs/Al systems.
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ChemistrySelect
·
2022
·Vol. 7
·期 45
·e202203721
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IF 2.307
Weihua Yu,Jianhua Kuang,Qingqing Hu,Zhonghua Wang,Yunwen Liao,Zhengjun Cheng
Graphical A new ratio fluorescent probe (RF-probe) based on the mixing of red-emitting D-penicillamine (DPA) stabilized copper nanoclusters (DPA-CuNCs) with pyridoxal 5’-phosphate (PLP) was designed for sensitive and selective determination of Al 3+ . The excess accumulation of nonessential Al 3+ in the human body can cause serious health problems, thus there is significant interest in the detection of Al 3+ . A new ratio fluorescent probe (RF-probe) based on the mixing of red-emitting D-penicillamine (DPA) stabilized copper nanoclusters (DPA-CuNCs) with pyridoxal 5’-phosphate (PLP) was designed for sensitive and selective determination of Al 3+ . The −CHO group of PLP is expected to form an imine linkage with the free −NH 2 group available of the DPA on the surface of DPA-CuNCs. The content of Al 3+ could be mensurated by the as-prepared RF-probe with a linear response in the range of 1.33–46.67 μmol ⋅ L −1 , and corresponding limit of detection (LOD) was calculated to be 0.33 μmol ⋅ L −1 . Moreover, the RF-probe was successfully extended to the assay of Al 3+ in aluminum carbonate chewing tablets, baking powder, pond water and drink water with satisfactory results compared to the standard atomic absorption spectroscopy (AAS).
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ACS Applied Nano Materials
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2023
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IF 5.9
Xinfang Zhang,Changqing Yin,Shupei Liu,Dalong Cong,Zhongsheng Li,Jiao Wang,Tao Sun,Xiaoying Liu,Zhenyu Liang,Shuai Jiang,Jinjin Li,Shuang Yi,Yuxin Zhang,Jinsong Rao
Two-dimensional (2D) nanomaterials have proven that potential applications in protecting metals from corrosion and wear. However, it remains a challenge in easy agglomeration and complex functionalization of 2D nanosheets in nanocomposite coatings. Herein, Co-doped MgAl-V2O74– layered double hydroxide (LDH) with transition metal carbide (Mo2CTx) nanosheet composites (CV-LDH-MXene) was synthesized by using a doping-electrostatic synergistic assembly strategy. After layer-by-layer assembly, nanosheet composite coatings had thicknesses of −6.9 μm. The corrosion results show that the incorporation of the CV-LDH-MXene nanocomposite coating can increase impedance at 10–2 Hz by 1 order of magnitude compared to pure LDH coating and decrease the corrosion current density by ∼30-fold. Furthermore, the friction results claimed that the CV-LDH-MXene nanosheet composites could make the coefficient of friction maintain at 0.09 after the running-in period, which displayed excellent relatively stable and anti-wear properties. These phenomena confirmed that there existed a synergistic effect of V2O74– intercalation and layer-assembled Mo2CTx MXene, which achieved stable anti-corrosion and wear characteristics. This investigation proved a substantial significance for the creation of LDH and MXene nanosheets and a giant step forward in the application of anti-corrosion and anti-wear. In particular, we promote the application of nautical instruments, underwater weapons, and seawater batteries in the shipbuilding industry and marine engineering.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mengli Xu,Yuan Shen,Linyu Wang,Coucong Gong,Shouhui Chen
In this work, a novel H 2 O 2 biosensor was developed based on the composites of microperoxidase-11 (MP-11) encapsulated in graphene oxide (GO)-PCN-333 (Al) (PCN stands for porous coordination network, one of the metal-organic frameworks). The PCN-333(Al) firmly and uniformly grew on the surface of GO sheet with large specific surface and excellent electrical conductivity, which provided a lots of pores for the encapsulation of MP-11 in the composites and selectively accumulated analytes into its mesopores to improve the selectivity of enzymatic reaction. The MP-11 molecules might freely move through mesopores of PCN-333 (Al) to maintain bioactivity, which remarkably enhanced the mass transfer rate and quickened the electron transfer for electrochemical biosensors. Scanning electron microscopy was used to characterize the GO and PCN-333(Al)-GO composites. Cyclic voltammetry and differential pulse voltammetry were used to characterize the electrochemical behaviors and performance of the H 2 O 2 biosensor. The target electrode showed excellent performance with a wide linear range from 10 μ M to 800 μ M, a low detection limit of 3 μ M, good stability and high selectivity, which was superior to some other H 2 O 2 biosensors.
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ENVIRONMENTAL AND EXPERIMENTAL BOTANY
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2023
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IF 5.7
ZhongJie Lu,Zheng Tian,Zhengyu Yang,Xinying Yin,Rui Dong
Due to its exceptional resistance to abiotic stress, common vetch ( Vicia sativa L.) is widely cultivated as an alternative methane source and a potentially healthy food and feed option. However, the comprehensive molecular processes behind various cultivars of common vetch's response to Al stress remain largely unexplored. In this study, a total of 35,969 unigenes , with an average length of 1302.79 bp and an N50 length of 2109 bp, were identified. Among these, 1965 and 6684 differentially expressed genes (DEGs) were detected in the Al-sensitive (Lanjian No.2) and Al-tolerant (Lanjian No.3) cultivars, respectively, with 331 DEGs commonly expressed in both cultivars. KEGG enrichment analysis revealed substantial enrichment of the citrate cycle (TCA cycle) and plant hormone signal transduction in Lanjian No.3, whereas "Plant-pathogen interaction" was significantly enriched in Lanjian No.2. Moreover, Al toxicity is suggested to be regulated through sodium-potassium channels, demethylation and esterification of cell wall pectin, as well as Ca 2+ -mediated CBL-CIPK signaling, hormone signaling, and TF binding. The candidate genes discovered in this study could be useful for breeding Al-tolerant pea cultivars in locations with acidic soil and may also reveal new insights into the molecular mechanism of Al stress in legumes.
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COMPOSITE STRUCTURES
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2023
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IF 6.3
Shulan Jiang,Ruyi Hu,Xuefeng Liu,Yanyan Cui,Yiru Ren,Hongyong Jiang
This study designs novel hierarchical microstructures of CFRP/Al interface with ZnO-NanoStructures (ZnO-NS) and Modified Resin Pre-Coating (RPC) to in-situ form nano-mechanical interlocking . ZnO-NSs with different growth times are fabricated by hydrothermal method , while the traditional RPC technology is modified by mixing resin-hardener-acetone with different ratios. Combining ZnO-NS and modified-RPC, difficultly infiltrated nanogaps among ZnO-NSs can be fully filled with resin to form flawless interface. Results show that the shear force firstly increases and then decreases with increasing growth time. As compared with no-ZnO-NS, 6 h-ZnO-NS presents a 207.5% higher shear force. When using ZnO-NS with RPC, an obvious reduction confirms that nanogaps are difficult to be infiltrated even through RPC technology. It is interesting that the shear property of sample with the modified RPC firstly increases and then decreases as the ratio changes. An improvement around 275.0% in shear force is identified for the modified-RPC with the ratio of resin, acetone and hardener (3:1:0.6) due to in-situ formed stronger nano-mechanical interlocking. The strengthening mechanisms are analyzed based on failure modes with different ZnO-NS-bridging length. The proposed method is of significance in lightweight material joining technology.
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Small Methods
·
2023
·
IF 12.4
Wending Pan,Yulong Zhang,Kee Wah Leong,Yingguang Zhang,Jianjun Mao,Yifei Wang,Xiaolong Zhao,Shijing Luo,D.Y.C Leung
In recent years, there have been significant advancements in Al-ion battery development, resulting in high voltage and capacity. Traditionally, only carbon-based materials with layered structures and strong bonding capabilities can deliver superior performance. However, most other materials exhibited low discharge voltages of 1.4 V, especially in aqueous Al-ion battery systems lacking anion intercalation. Thus, the development of high-voltage cathode materials has become crucial. This study introduces 2D MoS 2 as a high-performance cathode for aqueous Al-ion batteries. The material's interlayer structure enables the intercalation of AlCl 4 − anions, resulting in high-voltage intercalation. The resulting battery achieved a high voltage of 1.8 V with a capacity of 750 mAh g −1 , contributing to a high energy density of 890 Wh kg −1 and an impressive retention rate of ≈100% after 200 cycles. This research not only sheds light on the high-voltage anion-intercalation mechanism of MoS 2 but also paves the way for the further development of advanced cathode materials in the field of Al-ion batteries. By demonstrating the potential of using 2D MoS 2 as a cathode material, this finding can lead to the development of more efficient and innovative energy storage technologies, ultimately contributing to a sustainable and green energy future.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuting Xie,Haifeng Yang,Zhiqiang Qiao,Anqi Li,Miao He,Wenjing Yang,Yunhuai Zhang,Guangcheng Yang,Xueming Li
Physical destruction of microchips for data security based on thermite cannot simultaneously fulfill the demands of energy release and pressure output. Here, we have successfully assembled microchips based on Al/bimetallic oxide (CuBi 2 O 4 ) energetic films through electrophoretic deposition. Al/CuBi 2 O 4 exhibits excellent energy release and pressure output, the heat release of Al/CuBi 2 O 4 is more concentrated, as extensive heat released by Al/CuO triggered the reaction of Al and Bi 2 O 3 , which will be conducive to the destructive behavior. The effects of fuel and oxide with different ratios on exothermic performance were systematically investigated, including heat release, ignition threshold energy, ignition mass loss rate and pressure release. The best fuel/oxide ratio on Al/CuBi 2 O 4 energetic films is found to be 5.06:1 through inductively coupled plasma atomic emission spectrometry. The distribution between Al fuel and CuBi 2 O 4 rods is the most uniform at this ratio, hence it possesses the maximum heat release (926.4 J/g), lower ignition threshold (0.25 mJ), and faster pressurization rate (179.80 MPa/s). Importantly, high-speed photography results show that the intense reaction destroyed the energetic microchip (the thickness is about 0.3 mm) in only 10 ms.
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危险品化学品经营许可证（带存储）