ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Bo Yuan,Xiao-Qian Yin,Xiao-Qin Liu,Xing-Yang Li,Lin-Bing Sun
Much attention has been paid to metal–organic frameworks (MOFs) due to their large surface areas, tunable functionality, and diverse structure. Nevertheless, most reported MOFs show poor hydrothermal stability, which seriously hinders their applications. Here a strategy is adopted to tailor the properties of MOFs by means of incorporating carboxyl-functionalized natural clay attapulgite (ATP) into HKUST-1, a well-known MOF. A new type of hybrid material was thus fabricated from the hybridization of HKUST-1 and ATP. Our results indicated that the hydrothermal stability of the MOFs as well as the catalytic performance was apparently improved. The frameworks of HKUST-1 were severely destroyed after hydrothermal treatment (hot water vapor, 60 °C), while that of the hybrid materials was maintained. For the hybrid materials containing 8.4 wt % of ATP, the surface area reached 1302 m2·g–1 and was even higher than that of pristine HKUST-1 (1245 m2·g–1). In the ring-opening of styrene oxide, the conversion reached 98.9% at only 20 min under catalysis from the hybrid material, which was obviously higher than that over pristine HKUST-1 (80.9%). Moreover, the hybrid materials showed excellent reusability and the catalytic activity was recoverable without loss after six cycles. Our materials provide promising candidates for heterogeneous catalysis owing to the good catalytic activity and reusability.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 10
·10276-10281
·
IF 1.798
Wang Zhiqiang,Wang Botong,Xu Zebo
Optically active helical polyurea@attapulgite (HPUA@ATP) composites were prepared after the surface modification of the rod-like attapulgite (ATP). Composites were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction and thermogravimetric analysis. The results indicate that the helical polyureas have been successfully grafted onto the surfaces of the modified ATP (A-ATP) without destroying the original crystalline structure of ATP. The rod-like nanoparticles were confirmed by transmission electron microscopy. The dielectric constant and infrared emissivity have been investigated, and the results indicate that the dielectric constant value of HPUA@ATP composite has been increased to 33.62 from 25.35 (the value of bare ATP), while the infrared emissivity value of HPUA@ATP composite has been reduced to 0.39 from 0.93 (the value of bare ATP), due to the interfacial interactions between organics and inorganics and the ordered stereostructures of optically active helical polymers.
研究领域:
材料科学
·
高分子化学
·
纳米复合材料
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介电材料
·
红外技术
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DOI
高影响因子
MACROMOLECULAR BIOSCIENCE
·
2020
·Vol. 21
·期 1
·2000299
·
IF 3.416
Wei Ha,Ze-Hao Wang,Xiao-Bo Zhao,Yan-Ping Shi
Injectable hydrogels for nonsteroidal anti-inflammatory drugs’ (NSAIDs) delivery to minimize the side effects of NSAIDs and achieve long-term sustained release at the targeted site of synovial joint are attractive for osteoarthritis therapy, but how to improve its mechanical strength remains a challenge. In this work, a kind of 1D natural clay mineral material, attapulgite (ATP), is introduced to a classical cyclodextrin pseudopolyrotaxane (PPR) system to form a reinforced supramolecular hydrogel for sustained release of diclofenac sodium (DS) due to its rigid, rod-like morphology, and unique structure, which has great potential in tissue regeneration, repair, and engineering. Investigation on the interior morphology and rheological property of the obtained hydrogel points out that the ATP distributed in PPR hydrogel plays a role similar to the “reinforcement in concrete” and exhibits a positive effect on improving the mechanical properties of PPR hydrogel by regulating their interior morphology from a randomly distributed style to the well-ordered porous frame structure. The hybrid hydrogels demonstrate good shear-thinning and thixotropic properties, excellent biocompability, and sustained release behavior both in vitro and in vivo. Furthermore, preliminary in vivo treatment in an acute inflammatory rat model reveals that the ATP hybrid hydrogels present sustained anti-inflammatory effect.
研究领域:
材料科学
·
药剂学
·
风湿病学
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生物医学工程
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yunlong Guo,Shiwei Feng,Weizi Gao,Jingjing Cui,Zhe Lu,Chen Liang,Fukang Liu,Zhijie Mao,Zhenxiang Wang,Guang Hu,Biao Zhang
Ionic conductive hydrogels are widely used in many applications such as electrochemical energy storage, flexible electronic devices, and catalyst transistors due to their excellent ionic conductivity as well as chemical stability. However, the fragile mechanical properties and the lack of shaping methods severely limit their further applications. Herein, an ionic conductive composite hydrogel with reinforced mechanical properties is demonstrated that can be rapidly 3D printed using digital light processing technology. By using both γ-methacryloxypropyltrimethoxysilane moderately modified attapulgite rigid particle and polyvinyl alcohol (PVA) semicrystal dual-network reinforcement, the mechanically robust and highly conductive N , N , N -trimethylethanaminium-chloride-based hydrogels are obtained, demonstrating a 5 times higher tensile strength than the initial one due to the turning and orienting of the attapulgite as well as the robust PVA secondary network. Furthermore, encapsulation strategy is used to avoid the dehydration of hydrogel, and strain sensors that exceed the strain limit of the hydrogel are fabricated through structural design. This work provides a reference for attapulgite-reinforced hydrogel in biosensing.
研究领域:
材料科学
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生物传感技术
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柔性电子器件
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DOI
高影响因子
KINETICS AND CATALYSIS
·
2024
·Vol. 65
·期 3
·298-307
·
IF 1.3
Liu Wei,Wu Fengqin,Liu Jingwei,Meng Jie,Gao Bingying,Zuo Shixiang,Yao Chao
The specific surface area of attapulgite was significantly enhanced (from 128 to 212 m 2 /g) by its purification with sodium hexametaphosphate and nitric acid. Subsequently, an acid modification method was employed to prepare a coated attapulgite cordierite honeycomb with a specific surface area approximately 39 times larger than that of the bare cordierite honeycomb. SEM images showed that the surface of the cordierite was rough and uneven, with the attapulgite filling the large pores on its surface, forming a “nail-like” interaction between the coating and the carrier. After loading the catalyst, no significant mass loss was observed after 1 h of ultrasonic testing, indicating good adhesion stability of the coating. Furthermore, under test conditions of GHSV (Gas Hourly Space Velocity) = 10 000 h –1 and a toluene concentration of 1500 ppm, the prepared integrated catalyst exhibited excellent activity for the catalytic oxidation of toluene, with T 50 and T 90 values of 261 and 290°C, respectively, suggesting broad application prospects.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Yuan Zhou,Jin-Long Jiang,Xia-Ping Zhu,Wen Chen
In this study, attapulgite (ATP) was modified by Zr-based metal organic framework (UiO-66-NH 2 ) and poly(hexamethylenediamine-tannic acid) (HTA), an amino material named UiO-66-NH 2 /HTA/ATP (UHA) was prepared to efficiently remove Cr(VI). The morphology and structure of UHA were analyzed through various characterization methods. The conditions and influencing factors of UHA preparation and Cr(VI) adsorption were studied. The material had a maximum adsorption capacity of 270.3 mg/g for Cr(VI) when pH was 2.0, temperature was 298 K, adsorption time was 300 min, and ionic strength was 0.01 mol/L, which was obtained by the Langmuir fitting model. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir isothermal models, indicating that the adsorption process is mainly based on the chemical adsorption of monolayers. X-ray photoelectron spectroscopy analysis shows that UHA mainly removes Cr(VI) by hydrogen bonding , electrostatic attraction, reduction, and complexation. Thermodynamic investigation suggested a disordered, endothermic and spontaneous adsorption process. After UHA treatment, the simulated wastewater containing Cr(VI) met the discharge standard, and the results of cycling experiments showed that UHA has good renewable performance and offers potential prospects for Cr(VI) removal in water.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 4
·e56423
·
IF 2.7
Xinqiu Hong,Haifeng Li
Polyvinyl alcohol (PVA) fibers were manufactured by gel spinning with reinforcing of attapulgite (ATT) and cross-linking of boric acid (PVA/B/ATT fibers), in order to improve the mechanical properties. Furthermore, the final fibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), powder x-ray diffraction (XRD) and tensile strength tester. In addition, when ATT amount was no more than 2.0 wt%, FTIR analyses suggested that the degrees of cooperation combining of ATT and boric acid with PVA macromolecules were enhanced. SEM images indicated that PVA/B/ATT fibers had smooth surfaces. DSC, TGA and XRD results illustrated that the melting temperatures and maximum thermal decomposition temperatures first increased and then dropped as the content of ATT increased. Moreover, mechanical properties results indicated that the optimal ATT amount was 2.0 wt%, and the tensile strength of PVA/B/ATT-2 fiber reached the highest of 14.2 ± 0.3 cN/dtex. It was largely because that the cooperation combining of boric acid and ATT with PVA molecules improved the mechanical properties of PVA/B/ATT fibers.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Henan Peng,Pan Chen,Yuqi Wu,Chunhai Chen,Daming Wang
This study utilized polydopamine (PDA)/polyethyleneimine(PEI) as the hydrophilic interlayer and added aminated attapulgite (ATP-NH 2 ) to the aqueous phase monomer for interfacial polymerization (IP) to synergistically create nanofiltration membranes resistant to organic solvents. The hydrophilic nature of the PDA/PEI interlayer facilitates the rapid passage of polar solvents and results in excellent adhesion, ensuring tight bonding between the ultrafiltration support membranes and the active layer. Furthermore, the incorporation of the ATP-NH 2 nanoparticles played a pivotal role in regulating the IP process. The resulting nanofiltration membranes, produced through the combined efforts of these components, achieved an optimal methanol permeation flux of 14.05 L m −2 h −1 bar −1 , with a rejection rate of Evans blue dye maintained at 99.42 %. Despite being exposed to N, N-dimethylformamide (DMF) at 80 ℃ for a period of 5 days, the nanofiltration membranes maintained both their exceptional separation effectiveness and stability. These findings suggest promising application prospects for the developed nanofiltration membranes.
研究领域:
材料科学
·
化学工程
·
环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jie Wang,Junqing Meng,Zihan Zhou,Yingpei Lyu,Chunhui Lyu,Chengyu Gu
To address the issue of energy loss during the flow process in fire-fighting systems, the application of superhydrophobic coating technology has become a significant research focus. This work integrates silane coupling agent-modified attapulgite (ATP-KH) onto the fabric surface through a spraying technique, resulting in a stable coating with superhydrophobicity, anti-fouling properties, and flame resistance. The microstructure of ATP nanoparticles and coatings was characterized by experiments. The coating demonstrates remarkable superhydrophobicity, with a contact angle reaching 165.6°, and exhibits good self-cleaning, anti-fouling, chemical stability, and mechanical durability. The combustion behavior of the modified fabric is assessed through vertical burning tests and cone calorimetry experiments, revealing that the incorporation of ATP-KH reduces the peak heat release rate (PHRR) by 60.2 %, and the CO 2 produced by combustion decreased by 52 %, indicating a reduced fire hazard. X-ray diffraction (XRD) experiments confirm the presence of a dense char layer after combustion, which reasonably explains the improvement in the flame-retardant properties of the ATP-KH fabric. Furthermore, to expand the application of the coating in fire-fighting fields, it is applied to the surface of fabric pipes in combination with epoxy resin. Tests on the flow characteristics of the pipes indicate that the flow rate in ATP-KH pipes is increased by 12.2 %. Lastly, based on molecular simulations, the hydrophobic mechanism of the coating surface is elucidated, visually demonstrating the flow phenomenon on the surface. This work introduces superhydrophobic coating technology into fire-fighting systems, enhancing both the efficiency of extinguishing operations and the sustainability and energy efficiency of the system.
研究领域:
材料科学
·
消防工程
·
表面化学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Dan Chen,Ming Zhai,Jing Zhang,Liqi Miao,Kan Li,Zhong Wang,Xiaozhi Wang
Gold-based catalysts are renowned for their exceptional low-temperature oxidation activity and have found widespread application in the thermos catalytic oxidation of formaldehyde (HCHO). In this study, an in-situ hydrothermal synthesis method was employed to prepare Au 0.5 Ni x /ATP catalysts. By altering the doping amount of Ni during the synthesis process, the impact of Ni doping on the catalytic reactivity was investigated. Compared to pure gold-based catalysts, the dispersion and sintering resistance of the Au 0.5 Ni x /ATP catalysts were enhanced. The OH - ions present in the alkaline solution provided by TPAOH disrupted the morphology of ATP, leading to a flocculent appearance for the Au 0.5 /ATP catalyst. With varying doping levels of Ni, the rod-like structure of ATP gradually recovered due to the strong interaction between Ni 2+ and OH-. On the Au 0.5 Ni x /ATP catalysts, NiO, being a p-type semiconductor, was prone to electron loss, with the lost electrons being captured by Au 3+ to form Au 0 and stronger Au and Ni interactions. When Ni species were introduced onto the Au/ATP surface, the synergistic effect between Au and Ni resulted in higher catalytic activity, favoring the catalytic oxidation of HCHO. The catalytic efficiency peaked when the Ni doping level reached 20 wt%.
研究领域:
催化化学
·
环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yanjun Pan,Fanyue Meng,Jixing Bai,Bing Song,Qi Cao
Sulfate radical-based advanced oxidation processes (SR-AOPs) have been considered as a promising approach for degrading organic pollutants. Herein, CoFe 2 O 4 anchored on attapulgite-biochar composites (CoFe 2 O 4 @ATP–BC) were synthesized by a sol-gel co-pyrolysis method and showed excellent catalytic performance, reusability and stability in activating peroxymonosulfate (PMS) for the degradation of Rhodamine B (RhB). The effects of PMS concentration, catalyst dosage, temperature, initial pH, NOM and inorganic ions on the removal of RhB were investigated. The radical quenching experiments and electron paramagnetic resonance (EPR) measurement confirmed that 1 O 2 , O 2 ∙− and surface-bound ∙OH and SO 4 ∙− were major reactive oxygen species (ROS) in the RhB degradation by CoFe 2 O 4 @ATP–BC/PMS system, indicating that radical and non-radical degradation pathways were both involved. The possible catalytic mechanism of PMS by CoFe 2 O 4 @ATP–BC was proposed including the interface reaction and bulk reaction. The main degradation intermediates were identified by liquid chromatograph-mass spectrometry (LC-MS), and three possible degradation pathways of RhB were deduced accordingly. In general, the CoFe 2 O 4 @ATP–BC/PMS system provided fundamentals of theoretical and applied research to further develop supported bimetallic oxides for advanced oxidation treatment of organic wastewater.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Yuheng Chen,Guitao Li,Chenlei Qu,Huimin Qi,Ga Zhang
Development of innovative self-lubricating materials for applications in water medium is of significance for protecting the environment. In this study, polyurethane (PU) molecules crosslinked by attapulgite nanofibers (ATP) are formulated, and molybdenum disulfide (MoS 2 ) particles are further incorporated, aiming to improve their tribological performance under water-lubricated conditions. Compared to neat PU, the optimized composites exhibit 92.8 % and 78.7 % reductions in friction and wear, respectively, which are significantly lower than those of commercial materials. Owing to the intricate tribophysical and chemical interactions at the sliding interface, the tribo-chemical products of ATP are fed within the tribofilm, thereby promoting the development of a robust tribofilm with superior load-bearing capacity. This process effectively overcomes the insufficient lubrication load-bearing performance of the water film.
研究领域:
材料科学
·
摩擦学
·
纳米复合材料
·
高分子工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）