INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Ming feng Zou,Xiang ying Chen,Xia jie Lin,Meng ying Chen,Nan Nan Ding,Li-Ye Yang,Xiao-kun Ouyang
In the present study, we synthesized an effective Pb(II) adsorbent from magnetic carboxyl-functionalized attapulgite (McAPT) and sodium alginate (Alg) by simple mechanical agitation at room temperature. The novel McAPT@Alg composite was systematically characterized using a number of instrumental techniques, and the effects of adsorbent dosage, initial concentration of Pb(II), adsorption time, pH, and temperature on the adsorption capacity were investigated by performing batch experiments. The obtained results demonstrated that adsorption equilibrium could be reached within 1.5 h, with the maximum adsorption capacity being 471.20 mg g −1 while the temperature was 297.2 K. The experimental data were suitable for application to the Langmuir isotherm model, and the adsorption kinetics agreed with the pseudo-second-order model. More importantly, a Pb(II) removal efficiency of >70% could be achieved after 6× adsorbent recycling, which demonstrated the excellent potential of McAPT@Alg for removing Pb(II) from contaminated water.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2017
·
IF 3.752
Zhong-Qiu Liu,Xian-Yong Wei,Xiao Zhou,Yu-Chuan Xiao,Zhan-Ku Li,Xian-Hou Guo,Sheng-Kang Wang,Yang-Yang Zhang,Zhi-Min Zong,Feng-Yun Ma,Jing-Mei Liu
An acidic ionic liquid modified microfiber attapulgite (MFA)-supported nickel was prepared by thermally decomposing nickel tetracarbonyl onto MFA modified with an acidic ion liquid (AIL, 1-sulfobutyl-3-methylimidazolium trifluoromethanesulfonate). It was characterized with multiple instruments and used for catalyzing hydroconversion of coal-related model compounds (CRMCs) di(1-naphthyl)methane, diphenylmethane , bibenzyl, and 1,3-diphenylpropane. The results indicate that Ni/MFA@AIL effectively catalyzes hydroconversion of the CRMCs to afford cyclanes and alkylcyclanes by inducing the formation of H + , H − , and biatomic active hydrogen species.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Haijun Guo,Hairong Zhang,Liquan Zhang,Can Wang,Fen Peng,Qianlin Huang,Lian Xiong,Chao Huang,Xinping Ouyang,Xinde Chen,Xueqing Qiu
Acid-activated attapulgite (H+-ATP)-supported NiCoB amorphous alloy catalysts were applied to the selective hydrogenation of furfural (FUR) to furfuryl alcohol (FA). The reduction process between metallic ions impregnated in/on H+-ATP and BH4– is important to modify the textural properties of catalyst, because of the secondary activation of H+-ATP. The enhancement of interaction between H+-ATP and NiCoB particles promotes the dispersion of NiCoB amorphous alloy. Under the optimal conditions (140 °C, 3 MPa H2, 800 rpm, 3.8 wt % of NiCoB active component with respect to FUR), FUR conversion of 91.3%, and FA selectivity of 82.0% were achieved over the best catalyst (20%NiCoB/H+-ATP). Moreover, the catalyst was recycled six times and showed an increase of 3.9% in FUR conversion and 8.2% in FA selectivity, which might be due to the newly generated Co–Ni alloy active site. The low-cost nature of H+-ATP makes the supported NiCoB catalyst a potential catalyst for the industrial production of FA.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 3
·689-698
·
IF 7.2
Xu Kai,Gao Qingqing,Shi Shaoqi,Liu Pei,Ni Yinxu,Hao Zhilei,Xu Gaojie,Fu Yan,Liu Fenghua
Exploring high-efficiency and broadband microwave absorption (MA) materials with corrosion resistance and low cost is urgently needed for wide practical applications. Herein, the natural porous attapulgite (ATP) nanorods embedded with TiO 2 and polyaniline (PANI) nanoparticles are synthesized via heterogeneous precipitation and in-situ polymerization. The obtained PANI–TiO 2 –ATP one-dimensional (1D) nanostructures can intertwine into three-dimensional (3D) conductive network, which favors energy dissipation. The minimum reflection loss (RL min ) of the PANI–TiO 2 –ATP coating (20wt%) reaches −49.36 dB at 9.53 GHz, and the effective absorption bandwidth (EAB) can reach 6.53 GHz with a thickness of 2.1 mm. The excellent MA properties are attributed to interfacial polarization, multiple loss mechanisms, and good impedance matching induced by the synergistic effect of PANI–TiO 2 nanoparticle shells and ATP nanorods. In addition, salt spray and Tafel polarization curve tests reveal that the PANI–TiO 2 –ATP coating shows outstanding corrosion resistance performance. This study provides a low-cost and high-efficiency strategy for constructing 1D nanonetwork composites for MA and corrosion resistance applications using natural porous ATP nanorods as carriers.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yongqian Shen,Yuchen Zhang,Guibin Zhang,Fan Zhang,Jiafeng Cao,Fulong Yang,Xin Liu,Wenjuan Zhang,Huixia Feng,Xueyan Du
Multicomponent design based on magnetic carbon nanofibers (CNFs) composite is an expected approach to achieve excellent microwave absorption. Herein, the Co/attapulgite (ATP)/CNFs were prepared via electrospinning and vacuum calcination . The structure and electromagnetic (EM) properties of Co/ATP/CNFs impacted by the structure evolution of ATP at different calcination temperatures was investigated. At the calcination temperature of 550 °C, the optimal reflection loss (RL) reached −46.67 dB at 15.76 GHz in 2.5 mm thickness, and the effective absorbing bandwidth (EAB) reached 6.72 GHz at 3.0 mm thickness. ATP is introduced into Co/CNFs to construct the magnetic CNFs with various interfaces and bending structures, thereby enhancing dielectric loss and improving impedance matching, and finally realizing broadband absorption. This work presents a promising mentality to obtain environmental protection and efficient microwave absorbing materials (MAs).
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JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2024
·
IF 2.8
Shuaibin Wu
In this study, a novel surface covalent reaction method was used to modify attapulgite nanoparticles on the surface of polypropylene adsorption membrane to adsorb various small molecular pollutants for the first time. The surface covalent reaction method has the advantage of step control. Therefore, the uniformity and stability of attapulgite nanoparticles can be ensured, and then could effectively improve the adsorption performance of polypropylene adsorption membrane. On the other hand, compared with various materials modified on the surface of polypropylene adsorption membrane currently, attapulgite nanoparticles has the characteristics of low cost and environmental friendliness, which is more conducive to the large-scale practical application. The polypropylene adsorption membrane modified with attapulgite nanoparticles was characterized by field emission scanning electron microscopy, fourier transform infrared spectrometer and X-ray diffractograph, and it was confirmed that the attapulgite nanoparticles was successfully modified on the surface of the polypropylene adsorption membrane. The experimental results showed that the adsorption capacities of polypropylene adsorption membrane modified with attapulgite nanoparticles could reach 11.53 mg/g, 8.7 mg/g and 5.78 mg/g for cyromazine, malachite green and dagenan respectively within 10 s. In the case of the above three analytes, the minimum detected concentration could reach 0.02 mg/mL, and the relative standard deviation was about 10 %. At the same time, the adsorption performance of polypropylene adsorption membrane modified with attapulgite nanoparticles did not decrease significantly after 50 cycles. A standard recovery of 76.8 % − 89.5 % and a relative standard deviation of 7.2 % − 15.2 % were obtained by using the polypropylene adsorption membrane modified with attapulgite nanoparticles to adsorb cyromazine in cucumber skin samples, indicating that the polypropylene adsorption membrane modified with attapulgite nanoparticles has the ability to treat complex samples.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qichao Zhang,Xu Liu,Yishan Jiang,Binbin Zhang
The corrosion protection and ice-over delay of aluminum alloys have always been pressing issues. Lotus-inspired superhydrophobic materials show great potential in the field of corrosion prevention and delayed icing, but they are currently prone to failure due to wetting and adhesion by low surface tension liquids. In this paper, we constructed a superamphiphobic (superhydrophobic and superoleophobic) organosilane-grafted attapulgite (OG-ATP) coating on 5083 aluminum alloy substrates using ATP, tetraethyl orthosilicate (TEOS), and 1 H,1 H,2 H,2 H-perfluorooctyltriethoxysilane (PFAS) through hydrolysis-condensation reaction and spray-coating technique. The coating exhibits contact angles greater than 150º and sliding angles less than 10º for water, glycerol, ethylene glycol, peanut oil, and even n-hexadecane with surface tension@20 ºC of 27.5 mN/m. Through studying surface morphologies , chemical compositions, electrochemical behaviors, self-cleaning, and anti-icing performance, it was found that the R ct and |Z| 0.01 Hz of the protected aluminum alloy increased by four orders of magnitude with a corrosion inhibition efficiency of 99.99 %, demonstrating excellent anti-corrosion functionality. Additionally, icing test results at -5 °C, -10 °C, and -15 °C show that the prepared coating exhibits significant delayed icing performance. We believe that the integration of properties such as water-oil repellency, self-cleaning, anti-corrosion, and anti-icing will enable superamphiphobic materials to demonstrate enormous application prospects in various fields.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Bin Wu,Ying Li,Yuexi Liang,Sijing Yang,Haipeng Ren,Lu Lu,Zhenzhen Wei,Yan Zhao
High-safety and high-performance separators with exceptional mechanical and thermal stability are highly desired for simultaneously providing fast ion transport channels and achieving uniform Li + flux distribution to suppress dendrite growth. In this work, nanofiber composite separators (PAF) are fabricated by the electrospinning of polyacrylonitrile and the subsequent coating with an inorganic hybrid of conductive Fe 3 O 4 spherical particles and non-conductive attapulgite (ATP) rod-shaped particles. The PAF composite separator exhibits superior ionic transport ability with high ionic conductivity of 1.07 mS/cm and Li + transference number of 0.56, which can be attributed to the synergistic effect of the nanofiber substrate and the hybrid coatings. The high porosity and excellent electrolyte wettability of the separator, as well as the octahedral and tetrahedral voids in Fe 3 O 4 , provide more storage space for Li + ; the oxygen vacancies in nanoparticles are prone to combine with solvent molecules, and the hydroxyl groups adsorb PF- 6, thereby effectively accelerating the migration of cations. The battery with the composite separator, therefore, maintains a discharge specific capacity of 90 mAh/g after 500 cycles at 1 C rate and has a discharge capacity of 83 mAh/g at 5 C. Together with the improved mechanical and thermal stability, the nanofiber composite separator exhibits great potential for the advancement of lithium batteries with high safety and high performance.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Tingting Li,Xiaohui Yang,Jiaojiao Qiao,Yang Liu,Ting Zhang
In order to improve the adsorption capacity of attapulgite, a novel composite adsorbent EDTA/CS-ATP was synthesized by integrating attapulgite (ATP), chitosan (CS), and ethylenediaminetetraacetic acid (EDTA) by hydrothermal carbonization and grafting method. Under optimized conditions, the composite adsorbent achieved a removal ratio of 92.46 % and an adsorption capacity of 66.31 mg/g for methylene blue (MB) removal. Characterizations revealed that introducing CS and EDTA to ATP enhanced the electrostatic and hydrophobic interactions of ATP, which is beneficial for MB adsorption. Kinetic and thermodynamics studies showed that the adsorption followed pseudo-second-order kinetics and the Langmuir model, indicating a chemisorption-driven monolayer binding mechanism. Hydrogen bonding, electrostatic attraction, and π-π interactions were identified as the key mechanisms contributing to MB capture. Notably, compared to traditional EDTA-based materials mainly used for heavy metal removal, the EDTA/CS-ATP composite has the multifunctional sites to match the cationic and aromatic structure of MB, exhibiting highly selective and efficient MB removal. This work presents an environmentally friendly and scalable strategy for treating wastewater contaminated with cationic dyes, offering a promising solution for practical applications in water purification.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2017
·Vol. 24
·期 5
·1-9
·
IF 1.615
Xue Sheng,Yang Haicun,Ma Wenzhong,Gong Fanghong,Tao Guoliang,Liu Chunlin,Pan Ji
Poly(methyl methacrylate) brushes grafted from attapulgite nanoparticles (ATP@PMMA) were prepared by R-Supported reversible addition-fragmentation chain transfer polymerization (RAFT). ATP was firstly activated, and allowed to react with γ-aminopropyltriethoxysilane (APTES), 4,4′-azobis(4-cyanovaleric acid) (ACVA) and bis(thiobenzoyl) disulfide stepwise to afford 4-cyanopentanoic acid dithiobenzoate functionalized ATP (ATP-CPADB). Then, RAFT polymerizations of MMA mediated by the different systems were conducted and compared systemically. The grafting process was verified by FTIR, XRD, XPS, TGA and TEM data. Kinetic behavior indicated that the anchored CPADB is more effective before diffusing into the bulk phase. The grafting ratio ( G
r ), while M
n of grafted and free polymer increased linearly with increasing monomer conversion in presence of free CPADB, giving the hybrid particles with more homogeneous distribution of grafted polymer layer.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 237
·期 3
·129
·
IF 3
Han Yuliang,Fang Jiahui,Ji Xinyuan,Hu Sheng
To address the problem of excessive Cd (II) content in selenium-rich soil and water in Enshi region, this experiment utilized ion imprinting for selective adsorption of cadmium, which made the separation of selenium and cadmium possible. A novel attapulgite-based Cd(II) ion-imprinted polymer (AF-IIP) was prepared with the surface imprinting technique, using magnetic attapulgite as the matrix and (3-mercaptopropyl) trimethoxysilane (MPS) as the functional monomer. SEM, XRD, VSM, FT-IR and EDS elemental analysis were performed to confirm the structural transformations and compositional changes of the materials during the preparation process. The optimal pH, optimal time, adsorption kinetics and adsorption isotherms during the adsorption of Cd (II) by ion-imprinted polymers were investigated. The experimental results showed that the optimum pH of the adsorption process was 6.0 and the maximum adsorption amount was 49.0 mg·g −1 . In the presence of competitive ions, the adsorption capacity of AF-IIP for Cd (II) is much larger than that of Se ions, indicating that AF-IIP has good selectivity. The adsorption reaction conformed to the Langmuir isotherm model and kinetic data were more suitable to be explained by pseudo-second-order model. Furthermore, XPS analysis confirmed that Cd(II) adsorption primarily occurs via interactions with thiol (-SH) groups. In addition, regeneration tests have shown that AF-IIP was reusable and stable.
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高影响因子
TALANTA
·
2018
·
IF 4.244
Mengsa Chai,Yihui Chen,Rongrong Xuan,Junfeng Ma,Tingting Wang,Dan Qiu,Lihua Zhang,Yukui Zhang
In current study, an attapulgite nanoparticles-based hybrid monolith was prepared by crosslinking 3-trimethoxysilylpropyl methacrylate modified attapulgite nanoparticles with acrylamide and N, N′-methylenebisacrylamide. The crosslinking of attapulgite into the hybrid monolithic matrix has notable increased the column efficiency of adenosine comparing with the neat one without attapulgite. The resulting hybrid monoliths showed good permeability and good mechanical stability. It was further applied for separation of polar compounds by hydrophilic interaction chromatography (HILIC). The key factors affecting the separation efficiency of the developed hybrid monoliths (i.e. acetonitrile content, salt concentration and pH in the mobile phase) have been completely investigated. The column efficiency was up to 147,613 plates/m for the HILIC separation of aspirin. Good repeatability of retention time was achieved, with relative standard deviations for run-to-run (n = 3), column-to-column (n = 3) and batch-to-batch (n = 3) in the range of 1.08–1.45%, 2.44–3.41% and 2.15–4.96%, respectively. We propose that the attapulgite nanoparticles-based hybrid monolith would provide a promising stationary phase for hydrophilic interaction chromatography.
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