RSC Advances
·
2015
·Vol. 5
·期 127
·104884-104890
·
IF 3.84
Yuan Cai,Huihui Huang,Lei Wang,Xiaojun Zhang,Yuewei Yuan,Rui Li,Hui Wan,Guofeng Guan
Mesoporous γ-AlOOH and γ-Al2O3 with fibrous morphology were successfully synthesized by an ionic liquid ([OMim]Br) assisted low temperature precipitation method using aluminum nitrate and ammonia as aluminum source and precipitant, respectively. The samples were characterized by XRD, TG, FT-IR, TEM, and N2 adsorption–desorption technique. The results showed that the concentration of [OMim]Br had a significant effect on the phase, porous structure, and morphology of γ-Al2O3 due to the strong interactions between [OMim]Br and γ-AlOOH. High purity γ-AlOOH was synthesized at 0.2 M [OMim]Br and γ-Al2O3 with a specific surface area of 243.53 m2 g−1, pore volume of 0.68 cm3 g−1, and average pore size of 11.10 nm was obtained after calcination. Furthermore, the recyclability of [OMim]Br was investigated. The recovery rate of [OMim]Br could reach 95.0 wt%, and the recycled [OMim]Br still had effects on the synthesis of γ-AlOOH and γ-Al2O3.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 7
·8890-8902
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IF 2.478
Liu Yulong,Chen Yufei,Zhao Hui,Teng Chengjun
Graphene oxide (GO) was obtained by improved Hummers method; the pseudoboehmite (AlOOH) nanoparticles were prepared with aluminum isopropoxide by Sol–Gel method and modified by the silane coupling agent (KH-550) to get KH550-AlOOH. GO was coated by KH550-AlOOH to gain KH550-AlOOH@GO component. In the meantime, the matrix (E51-BCE) was synthesized from epoxy resin (E51) and bisphenol A cyanate (BCE). KH550-AlOOH@GO/E51-BCE composites were prepared via in situ polymerization, E51-BCE as the matrix and KH550-AlOOH@GO as the reinforcement. The micro-morphology of KH550-AlOOH@GO was investigated by Fourier transform infrared spectrometer (FT-IR) and transmission electron microscope (TEM), and the results showed that KH550-AlOOH was well distributed on the GO sheet and with abundant hydroxyl groups on its surface. The X-ray diffraction (XRD) and scanning electron microscope (SEM) of KH550-AlOOH@GO/E51-BCE composites indicated that KH550-AlOOH@GO was uniformly dispersed in E51-BCE matrix and there was a good interaction between them, which was conducive to the performances of the composite material. Mechanical and dielectric properties of composite also were tested and analyzed. The highest bending strength, bending modulus, and impact strength of KH550-AlOOH@GO/E51-BCE composites were 158.23 MPa, 2.37 GPa, and 46.96 kJ/m 2 , respectively, when the content of KH550-AlOOH@GO was 0.6 wt%, which were 15.72%, 22.42%, and 198.22% higher than those of the matrix resin, respectively. The dielectric constant and dielectric loss of the composite were 3.12 and 0.0027 at 100 Hz.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Sisi Lin,Xinkui Wang,Xiaoyu Liang,Xinxin Zhang,Min Wang
Photocatalytic reduction of CO2 to high value-added chemicals and fuels has received widespread attention. However, the higher thermodynamic stability of CO2 greatly limits its conversion efficiency. Frustrated Lewis pairs (FLPs) have been well-established to be very effective in CO2 activation. In this work, we prepared ZnIn2S4–AlOOH (ZIS–AlOOH) composites for visible-light-driven CO2 reduction. The Lewis basic OHv sites on the AlOOH surface (one H removed from OH) and an adjacent Lewis acidic unsaturated Al site (Al3+unsatur.) form the FLPs. The composite structure facilitated light absorption, CO2 adsorption activation, and separation of photogenerated carriers, thus improving the CO2 photoreduction activity (CO generation rate of 510.3 μmol g−1 h−1), and suppressing hydrogen evolution with the CO/H2 ratio increasing from 0.38 for ZnIn2S4 (ZIS) to 0.84 for ZIS–AlOOH. This work elucidates a rational strategy for the construction of efficient photocatalysts and provides insight into the mechanism of the photocatalytic CO2 reduction reaction.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Li Fangrun,Chen Haibo,Li Hang,Hu Jing,Zhang Jianli,Chen Qiang,Hou Guangya,Zhang Gang,Tang Yiping
Polyolefin separators are widely used in commercial lithium-ion batteries (LIBs), but their inherent limitations, such as poor thermal stability and low electrolyte wettability, restrict the further improvement of LIB performance. This paper presents a novel process for recovering and preparing submicron level AlOOH (boehmite) from the waste liquid of aluminum electrolytic capacitors. In addition, AlOOH/PVP@PP composite separators were prepared by utilizing polyvinylpyrrolidone (PVP), which has high thermal stability, as a binder, which significantly improves the thermal stability and electrochemical performance of lithium-ion batteries. The results of the study showed that the incorporation of polyvinylpyrrolidone (PVP) binder and AlOOH greatly improved the thermal stability of polypropylene (PP) separators. The thermal shrinkage of the AlOOH/PVP@PP separator at 180 °C was significantly reduced from 10.1% to 1.5% compared to the AlOOH/PVDF@PP separator fabricated with the conventional binder, while the structure of the AlOOH coating remained unchanged without significant changes. In addition, the voids between the AlOOH particles in the coating help to improve the containment of the electrolyte, which significantly improves the wettability of the separator. More importantly, the strong polarity of the PVP binder enhances the wettability of the separator to the electrolyte, improves the lithium-ion migration efficiency in the AlOOH/PVP@PP separator, and raises the ion transfer number from 0.447 to 0.661, thereby improving the electrochemical performance of the battery. Graphical This study leveraged the waste liquid from aluminum electrolytic capacitors to synthesize submicron-sized boehmite (AlOOH). It further employed PVP-a thermally stable binder with strong adhesion to both PP and AlOOH-to fabricate the AlOOH/PVP@PP composite separator. This innovative composite separator substantially enhanced the safety and electrochemical performance of the battery.
研究领域:
材料科学
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电化学
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储能
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纳米技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 31
·13310-13317
·
IF 7.79
Mengmeng Gao,Xiaolei Wu,Shuhong Yi,Shuwei Sun,Caiyan Yu,Dong Yan,Hui Ying Yang,Huiling Zhao,Ying Bai
Upgrading liquid electrolytes with all-solid-state electrolytes (ASEs) or quasi-solid-state electrolytes (QSEs) for solid-state batteries (SBs) have emerged not only to address the intrinsic disadvantages of traditional liquid lithium ion batteries, but also to offer more possibilities for the development of new battery chemistries. In this work, a novel rambutan-like yolk–shell-structured porous γ-AlOOH microsphere with a large specific surface area of 262.92 m2 g−1 was firstly obtained by a simple hydrothermal synthesis route, which was then utilized as a robust framework to assemble QSE via encapsulating abundant liquid electrolyte (LE). The obtained γ-AlOOH-QSE exhibits a high ionic conductivity of 4.0 × 10−3 S cm−1, a large lithium ion transference number (tLi+) of 0.76, as well as a wide electrochemical window of 4.72 V vs. Li/Li+. Moreover, the assembled cell of LiFePO4/γ-AlOOH-QSE/Li could maintain a high specific capacity of 144.4 mA h g−1 even after 120 cycles with almost negligible capacity decay, which could be mainly attributed to the excellent interfacial compatibility, prominent performance in suppressing lithium dendrite growth upon cycling (rigid characteristic), as well as the high ionic conductivity of γ-AlOOH-QSE (intrinsic advantage). This work could not only expand the applications of QSE with cost-effective aluminum-based oxides with facile fabrication strategy, but also will shed light on the construction of SEs with more integrated QSEs and ASEs in the field of advanced energy storage.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Han Jia,Hongyan Wu,Xin Wei,Yugui Han,Qiuxia Wang,Jinyong Song,Jiajun Dai,Hui Yan,Dexin Liu
Emulisons stabilized by surfactants have been used in enhanced oil recovery (EOR) for effective profile control and displacement, whereas the lack of long-term stability especially under harsh reservoir conditions limited their wide application. In this study, Pickering emulsions stabilized by sodium dodecylbenzenesulfonate (SDBS) and anisotropic slice-like AlOOH nanoparticles were systematically studied. The adsorption of SDBS on AlOOH nanoparticles was confirmed by the measurements of zeta potential and Fourier Transform Infrared (FTIR) spectra. The three-phase contact angle tests were conducted to explore the reason for the double phase inversion of the AlOOH/SDBS stabilized emulsions from o/w to w/o and back to o/w again. The optical microscopy images verified the adsorption mechanism of SDBS on AlOOH nanoparticles at the oil/water interface. It was found that the three-dimensional network structure formed by the micro-flocculated modified AlOOH nanoparticles could prevent coalescence and phase separation, resulting in the enhanced stability of the emulsion. The AlOOH/SDBS stabilized emulsion showed the super tolerances in a wide range of shear rates, temperature and electrolyte concentrations. The core flooding tests and microscopic visualization flooding experiments demonstrated that the AlOOH/SDBS stabilized emulsions significantly improved the tertiary oil recovery (33 % of IOIP) via the enhanced displacement and sweep efficiencies. The present study provides a typical Pickering emulsion with great stability under harsh reservoir conditions for EOR.
研究领域:
石油工程
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胶体化学
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界面科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 18
·12593-12599
·
IF 3.9
Junwei Li,Hongshuai Yin,Sisi Liu,Chaofa Xu,Zhixiong Cai
The catalytic performance of a catalyst is significantly influenced by its ability to activate hydrogen. Constructing frustrated Lewis pairs (FLPs) with the capacity for hydrogen dissociation on non-reducible supports remains a formidable challenge. Herein, we employed a straightforward method to synthesize a layered AlOOH featuring abundant OH defects suitable for constructing solid surface frustrated Lewis pair (ssFLP). The results indicated that the AlOOH-80 (synthesized at 80 °C) possessed an appropriate crystalline structure conducive to generating numerous OH defects, which facilitated the formation of ssFLP. This was further evidenced by the minimal water adsorption in the AlOOH-80, inversely correlated with the quantity of defects in the catalyst. As expected, the Pd loaded onto AlOOH (Pd/AlOOH-80) exhibited excellent catalytic activity in hydrogenation reactions, attributed to abundant defects available for constructing ssFLP. Remarkably, the Pd/AlOOH-80 catalyst, with larger-sized Pd nanoparticles, displayed notably superior activity compared to commercial Pd/Al2O3 and Pd/C, both featuring smaller-sized Pd nanoparticles. Evidently, under the influence of ssFLP, the size effect of Pd nanoparticles did not dominate, highlighting the pivotal role of ssFLP in enhancing catalytic performance. This catalyst also exhibited exceptionally high stability, indicating its potential for industrial applications.
研究领域:
催化化学
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材料科学
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Xueliang Cui,Yunfeng Zheng,Meng Tian,Zhengping Dong
A novel yolk–shell-structured material (Fe 3 O 4 @γ-AlOOH-YSMs) with hierarchical γ-AlOOH flakes as the mesoporous shell and Fe 3 O 4 nanoparticles (NPs) in the hollow core was prepared by using Fe 3 O 4 @SiO 2 NPs as the seeds as well as NaAlO 2 and urea as the precursor. The prepared Fe 3 O 4 @γ-AlOOH-YSMs were used as a catalyst support for fabricating a Pd/Fe 3 O 4 @γ-AlOOH-YSMs nanocatalyst with no obvious aggregation of the Pd NPs. The Pd/Fe 3 O 4 @γ-AlOOH-YSMs nanocatalyst was utilized for the catalytic reduction of the widely used and highly toxic 4-nitrophenol, rhodamine B, methylene blue, and methyl orange; and showed excellent catalytic activity as compared with other noble-metal-based catalysts. Furthermore, the Pd/Fe 3 O 4 @γ-AlOOH-YSMs nanocatalyst also can be easily separated from the reaction mixture and reused for at least ten times without any obvious decrease in the catalytic activity, indicating its reusability and stability.
研究领域:
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Hongsheng Liu,Hengyue Li,Bin Huang,Yange Yang,Haibo Guo,Yan Xiao,Weiguang Yang
To enhance the proton conductivity and durability of Ce-based hybrid proton exchange membranes (PEMs), this study fabricates modified perfluorosulfonic acid (PFSA) hybrid membranes by incorporating the dual-function γ-AlOOH@Ti-supported CeO 2 composite oxide (γ-AlOOH@Ti/CeO 2 ). In addition to combining the inherent proton conductivity of γ-AlOOH with the excellent radical scavenging ability of CeO 2 , both the proton conductivity and durability of Ce-based PEMs are further improved by introducing Ti-dopant, which not only increases hydrogen vacancies on the surface of γ-AlOOH, which facilitate proton conduction, and induces electron transfer from γ-AlOOH@Ti to CeO 2 , which enhance free radical adsorption. As results shown, the proton conductivity and the fluoride release value of the resulting hybrid membrane are about 76 % higher and 35.25 % lower than those of the PFSA-CeO 2 membrane, respectively. Moreover, the performance of cells shows that, after accelerated degradation testing, the PFSA-γ-AlOOH@Ti/CeO 2 membrane exhibits the lowest peak power density decrease rate, the impedance increase rate and hydrogen crossover current density, with 11.79 %, 27.54 % and 3.04 mA cm −2 , respectively. These results suggest that compared to CeO 2 -hybrid PEMs, γ-AlOOH@Ti/CeO 2 -based hybrid PEMs exhibit higher proton conductivity and superior chemical stability, indicating the potential application of γ-AlOOH@Ti/CeO 2 -based hybrid PEMs in proton exchange membrane fuel cells.
研究领域:
材料科学
·
能源化学
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电化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Yawen Sun,Yuzhen Pan,Zhe Zhang,Zhen Chen,Jiali Wang,Baodong Wang,Zihong Cheng,Wei Ma
Protein-like substances produced by biochemical reactions after disinfection of Zooplankton like Cyclops and humic substances in natural water are the main components of NOM (Natural organic matter). To eliminate early warning interference in the fluorescence detection of organic matter in natural water, a clustered flower-like AlOOH (aluminum oxide hydroxide) sorbent was prepared. HA (humic acid) and amino acids were selected as mimics of humic substances and protein-like substances in natural water. The results demonstrate that the adsorbent can selectively adsorb HA from the simulated mixed solution and restore the fluorescence properties of tryptophan and tyrosine. Based on these results, a stepwise fluorescence detection strategy was developed and used in natural water rich in zooplanktonic Cyclops. The results show that the established stepwise fluorescence strategy can well overcome the interference caused by fluorescence quenching. The sorbent was also used for water quality control to enhance coagulation treatment. Finally, trial runs of the water plant demonstrated its effectiveness and suggested a potential control method for early warning and monitoring of water quality.
研究领域:
环境科学
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水处理
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Xinjie Ma,Chaohua Peng,Longying Zhao,An Huang,Mengting Wei,Conghui Yuan,Yiting Xu,Birong Zeng,Guorong Chen,Weiang Luo,Lizong Dai
With the rapid development of next-generation optoelectronic devices, there is urgent demand for transparent and highly thermal conductive polymer film materials exhibiting superior performance. However, achieving a balance among these diverse properties remains a significant challenge. In this study, we propose a solution to this dilemma by introducing AlOOH nanowires into colorless polyimide (CPI) films. AlOOH/CPI composite films were prepared using a blade coating strategy. Remarkably, the in-plane arrangement of AlOOH nanowires within the CPI matrix facilitates the formation of thermal conductivity pathways. The resulting optimized composite film demonstrates a substantially higher in-plane thermal conductivity (3.568 W m −1 K −1 ) compared to pure CPI (0.626 W m −1 K −1 ), representing a more than fivefold increase. And the through-plane thermal conductivity showed a marginal enhancement. Moreover, due to the smaller length of the AlOOH nanowires (100 nm) in comparison to the wavelength of visible light, 10 wt% AlOOH/CPI composite film maintains a high transparency of 86.7 %, which is only 2.7 % lower than that of the pure CPI film. Besides, the formation of hydrogen bonds between AlOOH nanowires and the CPI matrix enhances the mechanical properties and dimensional stability of the AlOOH/CPI composite film. The Young's modulus (3.1 GPa) increases to 148 % of the original, while the thermal expansion coefficient (33.7 ppm °C −1 ) decreases to 73 % of the original value. Furthermore, AlOOH/CPI composite films exhibit excellent flexibility, chemical stability, flame retardancy, and electrical insulation property. These remarkable properties render AlOOH/CPI composite films highly promising for application in advanced optoelectronic devices. This study offers valuable insights into the preparation of CPI-based composite films with excellent comprehensive properties.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Han Jia,Daofan Wang,Fengbin Lv,Qiang Wang,Li Lv,Xin Wei,Lin Song,Haidong Jia,Kaihe Lv,Dexin Liu
Both negatively charged SiO 2 nanoparticle and positively charged AlOOH nanoparticle have been widely used in various fields, including enhanced oil recovery (EOR). In this study, the mixed binary AlOOH/SiO 2 nanoparticle (MBN) systems are constructed and firstly employed in EOR. The measurements of zeta potential and Z-average diameter indicate that the stable MBN aqueous dispersion could be obtained by controlling AlOOH/SiO 2 mass ratios, which is quantificationally confirmed via the e-DLVO theory. Then the ternary TX-100-AlOOH-SiO 2 (TX-A-S) system exhibits the great ability to stabilize the emulsion at the much low nanoparticle concentration (0.15 wt% in total). The emulsion stability is further evaluated in the harsh conditions (high shear, temperature and electrolyte concentration). Moreover, core flooding and microscopic visualization experiments reflect the TX-A-S stabilized emulsion can dramatically enhance tertiary oil recovery (~23% of initial oil in place), which should be attributed to the high improvement of both displacement and sweep efficiency.
研究领域:
胶体化学
·
石油工程
·
界面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）