Materials
·
2024
·Vol. 17
·期 9
·2162
·
IF 3.1
Yuanxin Man,Hui Nan,Jianzhe Ma,Zhike Li,Jingyuan Zhou,Xianlan Wang,Heqi Li,Caihong Xue,Yongchun Yang
In the field of lithium-ion batteries, the challenges posed by the low melting point and inadequate wettability of conventional polyolefin separators have increased the focus on ceramic-coated separators. This study introduces a highly efficient and stable boehmite/polydopamine/polyethylene (AlOOH-PDA-PE) separator. It is crafted by covalently attaching functionalized nanosized boehmite (γ-AlOOH) whiskers onto polyethylene (PE) surfaces. The presence of a covalent bond increases the stability at the interface, while amino groups on the surface of the separator enhance the infiltration of the electrolyte and facilitate the diffusion of lithium ions. The PE-PDA-AlOOH separator, when used in lithium-ion batteries, achieves a discharge capacity of 126 mAh g−1at 5 C and retains 97.1% capacity after 400 cycles, indicating superior cycling stability due to its covalently bonded ceramic surface. Thus, covalent interface modification is a promising strategy to prevent delamination of ceramic coatings in separators.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 39
·49158
·
IF 2.52
Yanyang Han,Haimei Wang,Xiuling Jiao,Dairong Chen
Poly(vinyl alcohol) (PVA) networks cross-linked by inorganic nanofillers-boehmite (AlOOH) nanowires via strong hydrogen bonding was prepared by a facile strategy. These PVA-AlOOH composites displayed significantly enhanced mechanical and thermal properties due to the excellent mechanical property and high heat resistant of AlOOH nanowires, as well as the strong hydrogen bonding formed between PVA and AlOOH. Interestingly, it was worth mentioning that the PVA-AlOOH composites exhibited excellent shape memory behavior. The strong hydrogen bonding between PVA matrix and AlOOH nanowires acted as the hard segments to maintain the permanent shape, while the weak one between PVA chains served as switching segments to fix the temporary shape and recover to the permanent shape. This physical cross-linked system provided a simple and efficient strategy to obtain smart shape memory materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2017
·
IF 4.873
Chengfeng Zhang,Zhenghai Tang,Baochun Guo
Interfacial interaction plays a vital role in the final properties of polymer composites as it affects the filler dispersion and stress transfer in the composites. In this study, we utilized two types of phosphate ester, hydroxyethyl methylacrylate phosphate (PH) and butyl phosphate (PB), as modifiers in boehmite (BM)-filled styrene-butadiene rubber (SBR) to tailor the interfacial structures in the composites. The modification mechanism of phosphate ester on BM and the interfacial structure in the composites are characterized. In PH-modified BM/SBR composites, a covalently bonding interface is obtained because PH can act as molecular bridge that can form covalent linkage with both BM and SBR chains. Consequently, the resulting composites show significantly improvements in the physical and mechanical properties of the composites. While in PB-modified BM/SBR composites, the properties of the composites are slightly improved due to the lack of covalent linkage in the interface.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Wenxin He,Yuanhong Lu,Chenxi Guan,Xiaohui Hou,Rui Huang,Dehui Deng
Selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using water as the hydrogen source offers a promising route to eliminate traditional H 2 preparation. However, this approach faces a trade-off between concurrently crating abundant active hydroxyls for hydrogenation and readily removing residual oxygen under mild conditions, restricting current development. Here, we report a naturally abundant lattice hydroxyl-mediated selective hydrogenation process over a boehmite-supported gold catalyst (Au/AlOOH), using H 2 O as the hydrogen source and CO as the oxygen acceptor. This process achieves 79% CAL conversion and 84% COL selectivity at 90 °C, doubling the efficiency of H 2 -based hydrogenation counterpart. In contrast, the OH-free Au/Al 2 O 3 shows no activity. Mechanistic studies indicate that the Au/AlOOH boundary provides unsaturated Al 3+ sites for selective C=O adsorption and lattice hydroxyls for hydrogenation, which are continuously replenished from water. CO adsorbed on Au facilitates oxygen removal, regenerating Al 3+ sites. This work presents a practical hydrogen transfer strategy that leverages the unique lattice hydroxyls of boehmite to efficiently extract hydrogen from water.
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Shuyang Shi,Baozhong Ma,Hui Yang,Zhihe Cao,Yubo Liu,Yongqiang Chen,Chengyan Wang
In bauxite-scarce China, aluminum extraction from alternative resources via the acid leaching process is promising. However, critical gaps persist: (1) pyrolysis yields lightweight alumina with limited market capacity, and (2) direct electrolytic alumina synthesis from acid leach liquor remains unexplored, especially alumina particle size control. The production of coarse boehmite as an alumina precursor via high-temperature autohydrolysis was investigated in this paper. First, the hydrolysis characteristics of Al 3+ were revealed by thermodynamic analysis. Subsequently, the experimental parameters and hydrolysate particle size were optimized through a series of experiments. Under optimal conditions, an Al hydrolysis ratio of 82.6 % and a median particle size of 27.1 μm for polycrystalline boehmite were achieved. The morphological evolution of boehmite was revealed by SEM. The hydrolysis path was determined by analyzing the variation of Al-ion species with pH. Kinetics demonstrated that the hydrolysis process followed heterogeneous nucleation and was chemically controlled, with an apparent activation energy of 52.2 kJ/mol. Finally, a novel process for electrolytic Al 2 O 3 preparation and simultaneous HNO 3 regeneration using coal gangue and fly ash as raw materials was proposed. This study establishes a technological foundation for producing electrolytic alumina from aluminum-containing solid wastes, providing a novel route for large-scale aluminum resource recovery.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 23
·11163-11173
·
IF 5.8
Weiran Zhao,Peng Tian,Tingting Gao,Wu Wang,Chenxi Mu,Hongchang Pang,Junwei Ye,Guiling Ning
PEO is one of the common composite polymer electrolyte vehicles; however, the presence of crystalline phase at room temperature, high interface impedance, and low oxidation resistance (<4.0 V) limit its application in stable all-solid-state lithium metal batteries. Herein, we designed a PEO-based solid polymer electrolyte (SPE) by adding boehmite nanoparticles to address the above-mentioned issues. Different-grain-sized boehmite nanoparticles were synthesized by adjusting the hydrothermal temperature. Moreover, the impacts of these distinct grain-sized boehmite nanoparticles used to fabricate boehmite/PEO polymer electrolytes (BPEs) on the performance of all-solid-state lithium metal batteries were investigated. It was found that with the increase in boehmite's grain size, BPEs show better performance. The best BPE exhibited an improved Li+ transference number (0.59), high ionic conductivity (1.25 × 10−4 S m−1), and wide electrochemical window (∼4.5 V) at 60 °C. The assembled lithium symmetric battery can stably undergo 500 hours of lithium plating/stripping at 0.1 mA cm−2. At the same time, the LiFePO4/BPE/Li battery exhibits excellent cycling stability after 100 cycles at 0.5C. This reasonable design strategy with a superior capacity retention rate (86%) demonstrates great potential in achieving high ionic conductivity and good interface stability for all-solid-state lithium metal batteries simultaneously.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chen Yang,Zhiguang Guo
The depletion of lubricants in (slippery liquid-infused porous surfaces) SLIPS poses a significant challenge to their long-term functionality. While line-shaped rough structures can mitigate lubricant loss to some extent, they often fail to provide the stability required for sustained performance. In this study, we present a novel porous nanoflower aluminum alloy slippery liquid-infused surface (P-NF-AA SLIPS), which integrates a porous framework with a rough nanoflower structure. This synergistic design offers dual benefits of enhanced oil storage and retention, leading to superior stability and durability. Remarkably, after centrifugation at 7000 rpm, the silicone oil retention of P-NF-AA SLIPS remains between 70–75 % of its pre-centrifugation mass. The surface demonstrates excellent adaptability to prolonged use under varying temperatures and pH levels. In fog collection, P-NF-AA SLIPS demonstrates rapid water droplet capture and detachment, achieving a fog collection efficiency of approximately 0.4 g·min −1 ·cm −2 within 10 min—an improvement of 185.7 % and 68.4 % over the original aluminum alloy (OAA) and superhydrophobic aluminum alloy (SHB-AA), respectively. Additionally, P-NF-AA SLIPS delays icing by 560 s at −15 °C and 231 s at −30 °C, offering remarkable anti-icing and de-icing performance. Furthermore, it demonstrates excellent self-cleaning properties against contaminants such as sand, coffee powder, and dye solutions. P-NF-AA SLIPS has advanced research on SLIPS and supports the application of biomimetic slippery surfaces in fields such as self-cleaning materials, anti-icing and anti-frost coatings, droplet control and transport, as well as biomedical applications.
研究领域:
材料科学
·
仿生学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junsheng Hou,Dongyu Li,Xiong Zhao,Li Ma,Lei Huang,Yinan Qiu,Junjie Wu,Zihan Ding,Jiabin Fang,Jinjia Wei,Nanjing Hao
Enhanced boiling heat transfer through nanofluids represents a significant approach to improving the cooling performance of electronic devices. However, the preparation of nanofluids poses challenges regarding production efficiency, morphology control, and structural stability. In addition, the underlying mechanism of flow boiling heat transfer enhancement of nanofluids, particularly changes in vapor behavior, remains a limited understanding. This study presents a facile and straightforward microfluidic strategy for the controllable synthesis of nanofluids toward efficient heat transfer enhancement. The microfluidic flow synthesis approach effectively enhances mixing efficiency at various flow rates, enabling continuous and high-throughput synthesis of boehmite nanofluids with different morphologies. The synthesized nanofluids exhibit long-term stability (>50 days) at room temperature. Both rod- and sphere-shaped nanofluids under equivalent concentrations can significantly improve critical heat flux (CHF) and maximum heat transfer coefficient (HTC) across various operating parameters, but with similar enhancement characteristics. Analysis of the period of bubble growth and burst, bubble size distributions, number of bubbles, and vapor phase fractions reveals that rod- and sphere-shaped nanofluids could shorten the period, enhance surface wetting, increase nucleation sites, and reduce bubble size efficiently and similarly. Furthermore, the effect of the concentration of nanofluid on phase-change heat transfer performance is systematically explored. 0.01 wt% nanofluid behaves the most remarkable enhancement, CHF and maximum HTC are improved by 24 % and 14.4 %, respectively. These findings not only shed new light on the controllable synthesis of functional nanomaterials but also provide important guidelines for the rational design of nanofluids for efficient two-phase cooling of electronic devices.
研究领域:
材料科学
·
热能工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Song Han,Xiang Cheng,Longheng Xiao,Xiangtao Huo,Min Guo,Mei Zhang
The self-assemble hydrophobic aerogel-like hollow boehmite microspheres adsorbents were prepared by surface silylation modification method using methyltrimethoxysilane silanizing agent. The density of the adsorbents was as low as 0.1 g/cm 3 , the average pore diameter was 12.2–15.3 nm, and the water contact angle was 130°∼143.8°. The hollow microsphere adsorbents could uptake 8.51 g/g for engine oil , 8.42 g/g for peanut oil, 7.29 g/g for kerosene and 5.80 g/g for n-hexane. After 20 regeneration cycles in n-hexane, the regeneration rate of the adsorbent was still as high as 95.17 %，meaning adsorption capacity of the adsorbent did not decrease significantly. The aerogel-like hollow boehmite microspheres with good hydrophobicity can be used as a kind of potential candidate material to remove different oils and organic liquids.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2009
·Vol. 358
·期 2
·173-179
·
IF 3.19
Guan Huang,Shang-Yue Liu,Yong-An Guo,Ai-Ping Wang,Jin Luo,Chun-Cai Cai
The search for a reusable material as an efficient and economic catalyst for hydrocarbon oxidation is an important field of research. In this study, we investigated the highly effective combination of support and metalloporphyrin provided by manganese tetraphenylporphyrin adsorbed onto a precursor of freshly precipitated aluminium hydroxide, followed by conversion to a manganese porphyrin/boehmite compound. This was characterized using FT-IR, UV–vis spectroscopic techniques, N 2 BET analysis, X-ray powder diffraction, transmission electron micrograph technique and thermal analysis. Aerobic oxidation of cyclohexane has been investigated using the compound as a catalyst under mild conditions and in the absence of any solvent and reductant. The results indicate that it has higher catalytic activity than manganese tetraphenylporphyrin and the corresponding chitosan-supported catalyst. In particular, the catalyst exhibits good atom economy for cyclohexane oxidation, high catalyst turnover number, and good ketone and alcohol selectivity. In particular, it has excellent reusability, with no change in original catalytic activity; a quantity of catalyst containing only 1 mg of Mn TPP can be reused 8 times under the promotion of beomite (BM). In addition, we examined the reaction conditions for the use of such nanoparticle-supported manganese tetraphenylporphyrin as a mild and environmental friendly oxidation catalyst.
研究领域:
催化化学
·
纳米材料
·
绿色化学
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有机氧化反应
·
多相催化
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2014
·
IF 3.679
Yujia Xie,Fengyong Zhang,Pingle Liu,Fang Hao,He’an Luo
Metalloporphyrin-catalysed direct functionalization of saturated C H bonds is one among the topical and challenging areas within the chemical industry. In this work, three types of unsupported and boehmite supported trans-A 2 B 2 -metalloporphyrin chloride complexes (Co-D( p -Cl)PPCl, Fe-D( p -Cl)PPCl, Mn-D( p -Cl)PPCl) were prepared and characterized. It has been found that these trans-A 2 B 2 -metalloporphyrins have high catalytic activity in cyclohexane oxidation under dioxygen. The boehmite supported metalloporphyrins show better catalytic performance and are more stable than unsupported metalloporphyrins. Among these supported metalloporphyrin catalysts, Co-D( p -Cl)PPCl/BM was better than Fe-D( p -Cl)PPCl/BM and Mn-D( p -Cl)PPCl/BM, the cyclohexane conversion and selectivity to KA oil are 6.83% and 83.30%, respectively, and the turnover number is 1.05 × 10 7 . The Co-D( p -Cl)PPCl/BM catalyst can be facilely recovered and was recycled up to six times without significant decrease in catalytic performance.
研究领域:
化学工业
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Kezhuo Li,Gaoqian Yuan,Long Dong,Gao Deng,Hongjuan Duan,Quanli Jia,Haijun Zhang,Shaowei Zhang
As a toxic azo anion dye, Congo Red (CR) in waste-water poses a potential threat to the environment and human health. An absorbent is often used for its removal, during which, however, the role played by the functional groups is still not fully understood. In this work, a boehmite aerogel with a specific surface area as high as 305 m 2 /g was successfully developed by a combined sol–gel and freeze-drying method, and its CR adsorption capacity reached as high as 1962 mg·g −1 . The adsorption process was dominated by a chemisorption mechanism and could be well described by the Langmuir isothermal model. The combination of the density functional theory (DFT) calculations and experimental results suggested that the amino protonation was responsible for the additional enhancement of CR adsorption in an acidic medium. The adsorption process occurred via interactions between boehmite aerogels and the SO 3 functional groups of CR. Additionally, the NH 3 group resultant from the protonation of NH 2 functional groups of CR in an acidic medium significantly enhanced the CR adsorption on the boehmite aerogels. This work not only developed an ultrahigh efficiency anion adsorbent for CR removal, but also provided a new strategy for the exploration of new adsorbents with further improved performance.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）