ACS Applied Nano Materials
·
2021
·
IF 5.097
Dongfei Sun,Dandan Yu,Sen Lin,Zijuan Wang,Fangfang Deng,Xiaozhong Zhou,Guofu Ma,Ziqiang Lei
Aqueous zinc ion batteries (AZIBs) are promising for energy storage due to their high specific capacity and high safety. Unfortunately, uneven Zn dendrite growth and corrosion limit their further application. Herein, we demonstrate a cost-effective porous attapulgite nanorod protective layer to endow Zn anodes with dendrite-free Zn stripping/plating. The porous attapulgite coating serves as an artificial protective layer, which not only provides multiple nanochannels to homogenize the Zn2+ flux for uniform Zn stripping/plating but also improves the hydrophilicity favoring electrolyte infiltration and fast Zn2+ transport. In consequence, the ATP-Zn anode displays significantly reduced charge transfer resistance. Symmetric cells based on the ATP-Zn anode exhibit long cycling stability of 1600 h with a small voltage hysteresis of 40 mV at 0.25 mA cm–2, much better than that of the bare Zn anode. The ATP-Zn anode also displays a high Coulombic efficiency of 98% and a lower nucleation overpotential in half-cells. When compared with the typical β-MnO2 cathode, the ATP-Zn//MnO2 cell exhibits good cyclic stability. The reversible capacity of the ATP-Zn//MnO2 cell is 210 mAh g–1 after 300 cycles at 1C, while the capacity of the Zn//MnO2 cell is only 107 mAh g–1. This work provides an eco-friendly and facile strategy to upgrade the electrochemical stability of AZIBs.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shupanxiang Chen,Bo Jia,Yu Peng,Xiao Luo,Yangqiang Huang,Bo Jin,Hongxia Gao,Zhiwu Liang,Xiayi Hu,Yefeng Zhou
In this study, attapulgite (AT) was treated by high-temperature roasting and hydrochloric acid to form HcAT. It was then modified with 3-aminopropyltrimethoxysilane (APS) through the grafting method to synthesize a new adsorbent, which exhibits relatively low regenerative energy consumption in CO2 adsorption and desorption processes. Scanning electron microscopy (SEM), N2 adsorption–desorption, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis were selected to support the research. The CO2 adsorption process on the adsorbent was studied at different APS loadings and different temperatures. The maximal amount of CO2 adsorbed on the adsorbent is 1.81 mmol/g at 313 K when the APS mass fraction is 30%. The Freundlich isotherm model shows a great correlation with the CO2 adsorption isotherm obtained from the experimental data, and R2 reached up to 0.996. The isosteric heat while CO2 adsorbed on 30%APS-HcAT is calculated as 62.63 kJ/mol. The regeneration cyclic stability of 30%APS-HcAT is excellent, while the CO2 adsorption capacity only decreased by 3.2% after 10 cycles. The energy consumption in the CO2 desorption process was also calculated as 26.875 kJ/mol. Three different kinetic models were selected to fit the experimental data, and two models showed a great fit, which were the pseudo-second and Avrami’s fractional order models. The activation energy of 30%APS-HcAT was 38.826 kJ/mol, which can be calculated from the experimental data, and this value is higher compared with those of the other sorbents modified by the impregnation method and also much lower than the value of the chemical absorption process between traditional amine solvents and CO2.
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
Biomaterials Advances
·
2022
·
IF 0
Ting Dai,Jiayi Ma,Su Ni,Chun Liu,Yan Wang,Siyu Wu,Jun Liu,Yiping Weng,Dong Zhou,Ana Jimenez-Franco,Hongbin Zhao,Xiubo Zhao
Electrospun PCL scaffolds have been widely used for tissue engineering as they have shown great potential to mimic the structure of the natural extracellular matrix (ECM). However, the small pore size and low bioactivity of the scaffolds limit cell migration and tissue formation. In this study, PCL (polycaprolactone), PCL/PEG (polyethylene glycol), and PCL/PEG/ATP (nano-attapulgite) scaffolds were fabricated via electrospinning. To increase the porosity of the scaffolds, they were washed to remove water-soluble PEG fibers. Then the porous structure was measured using scanning electron microscopy (SEM) and atomic force microscopy (AFM), which showed an increased porosity when PEG fibers were removed in PCL/PEG and PCL/PEG/ATP scaffolds. Moreover, the mechanical properties were also analyzed in dry and wet conditions. In vitro mouse multipotent mesenchymal precursor cells were used to assess the biocompatibility of the scaffolds, and osteogenesis was analyzed using CCK-8 and real-time PCR (RT-PCR) methods. Moreover, in vivo μCT, histological and immunohistochemical analyses were conducted to evaluate new bone formation in rat cranium defect models. Washed PCL/PEG/ATP scaffolds were implanted into the cranium defects in rats for 4 or 8 weeks, better cell infiltration was observed in these scaffolds than in unwashed ones. The result demonstrated that washed PCL/PEG/ATP scaffold facilitated the differentiation of MSCs into osteoblasts compared with PCL scaffold, as proved by the increased expression of osteogenic key genes as well as Smad1, Smad4, and Smad5. Furthermore, in vivo studies demonstrated that using the ATP-doped electrospun PCL scaffold can improve the bone regeneration of rat cranium defects. Particularly, the PCL/ATP-30% scaffold has the best effect compared to the other scaffolds. The enhanced osteogenesis and bone repair were related to the PCL/ATP activated BMP/Smad signaling pathway.
研究领域:
组织工程
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2022
·
IF 2.712
Wen Qin,Chenkai Li,Chun Liu,Siyu Wu,Jun Liu,Jiayi Ma,Wenyang Chen,Hongbin Zhao,Xiubo Zhao
Tissue-engineered bone material is one of the effective methods to repair bone defects, but the application is restricted in clinical because of the lack of excellent scaffolds that can induce bone regeneration as well as the difficulty in making scaffolds with personalized structures. 3D printing is an emerging technology that can fabricate bespoke 3D scaffolds with precise structure. However, it is challenging to develop the scaffold materials with excellent printability, osteogenesis ability, and mechanical strength. In this study, graphene oxide (GO), attapulgite (ATP), type I collagen (Col I) and polyvinyl alcohol were used as raw materials to prepare composite scaffolds via 3D bioprinting. The composite materials showed excellent printability. The microcosmic architecture and properties was characterized by scanning electron microscopy, Fourier transform infrared and thermal gravimetric analyzer, respectively. To verify the biocompatibility of the scaffolds, the viability, proliferation and osteogenic differentiation of Bone Marrow Stromal Cells (BMSCs) on the scaffolds were assessed by CCK-8, Live/Dead staining and Real-time PCR in vitro. The composited scaffolds were then implanted into the skull defects on rat for bone regeneration. Hematoxylin-eosin staining, Masson staining and immunohistochemistry staining were carried out in vivo to evaluate the regeneration of bone tissue.The results showed that GO/ATP/COL scaffolds have been demonstrated to possess controlled porosity, water absorption, biodegradability and good apatite-mineralization ability. The scaffold consisting of 0.5% GO/ATP/COL have excellent biocompatibility and was able to promote the growth, proliferation and osteogenic differentiation of mouse BMSCs in vitro. Furthermore, the 0.5% GO/ATP/COL scaffolds were also able to promote bone regeneration of in rat skull defects. Our results illustrated that the 3D printed GO/ATP/COL composite scaffolds have good mechanical properties, excellent cytocompatibility for enhanced mouse BMSCs adhesion, proliferation, and osteogenic differentiation. All these advantages made it potential as a promising biomaterial for osteogenic reconstruction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2021
·
IF 3.512
Zhifang Zhang,Wenjun Gui,Jia Wei,Yanjun Cui,Ping Li,Zhilong Jia,Peng Kong
Attapulgite (denoted as APT, also called palygorskite) has been regarded as the green material in the “21st century world” and has attracted widespread attention due to its advantages of low cost, natural abundance, nontoxic nature, and environmental friendliness. However, the limited adsorption sites and surface charges of natural APT greatly hinder its application as an adsorbent in industrial fields. In this work, natural APT was modified with sodium humate (SA) via a facile one-step hydrothermal process to improve its adsorption capacity and systematically studied its ability to remove methylene blue (MB) from aqueous solutions. The effect of hydrothermal modification in the presence of SA on the microscopic structure, morphology, and physicochemical properties of APT was studied by field-emission scanning electron microscopy, Fourier transform infrared spectrometry, X-ray diffraction, and Brunauer–Emmett–Teller analyses. The adsorption properties of the modified APT toward MB were evaluated systematically. The results demonstrated that the modified APT has a high adsorption capacity of 227.27 mg/g and also shows a high removal rate up to 99.7% toward MB in a dye solution with an initial concentration of 150 mg/L, which was a 64.7% increase as compared to that of raw APT. The adsorption kinetics could be fitted to the pseudo-second-order model, while the adsorption isotherm could be well-described with the Langmuir model. It was concluded that electrostatic attraction, hydrogen-bonding interaction, and chemical association are the main driving force during the adsorption process.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Tao Lin,Jiacheng Lin,Xiaoyao Wei,Lulu Lu,Xuefeng Yin
Among the electrode materials of supercapacitors , transition metal oxides have been widely used because of their low price, high theoretical capacitance and good cycle stability, and MnO 2 is one of the typical representative materials. However, the actual specific capacitance of MnO 2 is low because of its poor conductivity, easy agglomeration in the preparation process and large volume change in the process of repeated charge and discharge. Attapulgite can not only provide a large specific surface area for transition metal oxide materials, but also provide a skeleton on which nano-sized materials can be grown or dispersed. Therefore, the electrochemical performance of electrode materials can be improved by designing nanostructures and compounding a variety of materials with different properties. Herein, a new type of composites electrode material is prepared by simple one-step hydrothermal method . As an electrode material, the ATP-MnO 2 composites exhibited a high specific capacitance of 138.2 F/g at a current density of 0.5 A/g, which was 13.4% higher than that of pure MnO 2 nanoflowers . Under the current density of 3 A/g, the capacitance retention of ATP-MnO 2 composites was 89.4% after 5000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2023
·Vol. 13
·期 1
·1-16
·
IF 4.6
Shen Shaohang,Wei Hua,Pan Yu,Hu Pan,Yang Hu
Coagulation/flocculation is one of the most widely used and cost-effective pretreatment methods for improving the dewaterability of sludge. In this study, a cationic modified starch-based flocculant (St-CTA) in conjunction with a popular clay, attapulgite (ATP), was used for the conditioning of waste-activated sludge. The dewatering properties, including the filter cake moisture content, filtration specific resistance, capillary suction time, filtration rate and compressibility coefficient, were measured and compared by varying the doses of St-CTA and ATP. By combination of the apparent dewatering performance and the changes in the contents and distributions of the extracellular polymeric substance (EPS) fractions and components, sludge flocs, and microstructures of sludge cakes, the dewatering mechanisms were discussed in detail. St-CTA in conjunction with ATP can exhibit an enhanced dewaterability of sludge and the water content in final sludge cake can be stably reduced below 80% owing to the synergistic effects of St-CTA and ATP. In addition to the efficient charge neutralization of St-CTA, ATP not only acts as a skeleton builder in the sludge dewatering process which makes the sludge flocs more compact and improves the filterability and permeability, but also tightly interacts with the proteins in EPS of the sludge which reduces the protein content and further enhances the dewatering effect. This study provides an economical, green, and effective way to further improve the dewaterability of sludge.
研究领域:
环境科学
·
污水处理
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产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 6
·2292
·
IF 3.4
Zhixiang Zhu,Shengyuan Wang,Ya Zhong,Qi You,Jun Gao,Sheng Cui,Xiaodong Shen
Dye wastewater has caused great harm to the environment, which is an urgent problem to be solved. As typical three-dimensional porous materials, aerogels have attracted great interest in dye wastewater treatment. In this work, spherical attapulgite/silica (ATP/SiO2) gels were initially prepared by easily scalable sol-gel dripping methods and then dried to aerogels with three drying techniques, namely, supercritical CO2drying (SCD), freeze-drying (FD), and ambient pressure drying (APD). The effect of the drying techniques and heat-treated temperature on the physical characteristic, morphological properties, microstructure, and chemical structure of the spherical ATP/SiO2aerogels were investigated. The macroscopic morphology of the spherical ATP/SiO2aerogels was homogeneous and integrated without local cracking. The average pore diameter and specific surface area of the spherical ATP/SiO2aerogels prepared by the three drying techniques were in the range of 6.8–8.6 nm and 218.5–267.4 m2/g, respectively. The heat treatment temperature had a significant effect on the pore structure and the wetting properties of the aerogels. The 600 °C heat-treated aerogels were subjected to adsorption tests in methylene blue (MB) solution (60 mg/g, 100 mL), which exhibited a great adsorption capacity of 102.50 mg/g. Therefore, the resulting spherical ATP/SiO2aerogels possessed multipath preparation and exhibited an efficient adsorption performance, with the potential to be applied as an adsorbent for dye wastewater.Keywords:spherical ATP/SiO2aerogels;drying techniques;heat treatment;adsorption performance
研究领域:
环境科学
·
材料科学
·
废水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOM
·
2023
·Vol. 75
·期 12
·5606-5618
·
IF 2.6
Wang Jiuling,He Dandan,Chu Ling,Zhang Yupeng,Zhang Wenbo,Zhang Hong
The massive use of antibiotics has led to contamination of water resources, and concerns have been raised about how to treat antibiotic residues in water. In this study, a novel magnetic attapulgite composite (Fe@APT) was prepared by facile chemical precipitation. The characteristics and properties of Fe@APT were revealed by TEM, XRD, FTIR, XPS, BET, VSM, zeta potential, and batch adsorption experiments. The specific surface area of Fe@APT could reach 246.27 m 2 /g, which was about 1.8 times higher than that of APT. And the adsorption of tetracycline (TC) by the composite was shown by kinetics and isotherms to reveal the mechanisms, such as electrostatic attraction, physical adsorption, hydrogen bonding, π – π interaction, complexation, and electron transfer. The effects of pH and ions coexistence on the removal of TC by Fe@APT were also investigated. Specifically, the pore structure of Fe@APT was ameliorated and abundant active adsorption sites were obtained by the modification. The results showed that the maximum adsorption capacity reached 177.94 mg/g when the pH was 4, and it also exhibited good adsorption capacity under the interference of coexisting ions. Furthermore, the adsorbent displayed excellent recycling performance with easy separation. It has been proved that Fe@APT might have a potential application in antibiotic wastewater.
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
Science of Advanced Materials
·
2020
·Vol. 12
·期 11
·1673-1679
·
IF 1.117
Liu Dong-Bin,Li Ye,Zhou Yu-Zhi,Xu Li-Dong,Liu Dong-Xue,Li Bo-Lin,Zhao Shao-Lin
In this study, (3-mercaptopropyl) trimethoxysilane as a modifier, the mercapto group (-SH) was grafted onto the surface of attapulgite (ATP) by ultrasonic stirring. Before and after modification, the surface feature and structure of attapulgite and mercapto attapulgite (ATP-SH) were
characterized by using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD), the results indicated that the physicochemical changes of the materials and the mercapto groups were jointed on the surface of attapulgite. In this work, mercapto
attapulgite was used as an adsorbent for manganese adsorption, adsorption experiments were implemented to investigate the effects of different influencing conditions, the results shown that the solution pH showed a slightly impact in the sorption process, because of the presence of manganese
in the solution is Mn2+ and MnOH+. The Fourier transform infrared characterization results illustrated that the mercapto attapulgite had a number of active functional groups on the surface, which can combine with manganese. Moreover, the sorption process was more suitable
for the pseudo-second-order model (R
2 = 0.9986), which was illustrated that the chemical sorption plays a major role, and also existed physisorption. The sorption experiments date were more suitable for fitted to Langmuir isotherm model (R
2 = 0.9961), illustrated
that the adsorption process was dominated by monolayer adsorption. These results of the removal ratio, sorption capacity and adsorption mechanism of manganese suggest that the mercapto attapulgite could be applied as an adsorbent for extracting manganese from sewage.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Xuehui Liu,Yuchuan Cheng,Wei Wang,Fenghua Liu,Baorong Hou
The development of active systems to protect metal substrates against corrosion by using inhibitor-loaded nanocontainers is a promising approach for many industrial applications. This study introduces attapulgite as a reservoir for loading a corrosion inhibitor (benzotriazole). As a key component, inhibitor-loaded attapulgite was dispersed in a water-based epoxy coating to protect carbon steel. The release behavior of the encapsulated inhibitor from the attapulgite nanocontainers in response to pH variation was investigated using UV–visible spectroscopy. The corrosion properties of the composite coatings were explored by electrochemical impedance spectroscopy . The coating with inhibitor-loaded attapulgite demonstrated enhanced film barrier properties compared with blank coating. The scratched coating with inhibitor-loaded attapulgite showed increased corrosion resistance relative to that of the blank coating after immersion and hence exhibited an active corrosion protection . The coating's self-healing mechanism can be attributed to the passive film formation on the metal surface promoted by the inhibitor release from the nanocontainers.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Shuaiya Xue,Bingfeng Li,Peng Mu,Jian Li
Magnesium (Mg) and its alloys are susceptible to corrosion, which affects their large-scale applications. The traditional superhydrophobic coatings for corrosion protection of Mg substrates are particularly fragile and easily damaged after prolonged exposure to harsh conditions. Herein, a superhydrophobic ODA/PDA/APT-Ce 3+ (OPA-Ce 3+ ) coating with corrosion inhibition and self-healing properties was proposed to prevent corrosion of Mg alloy via combining the cerium nitrate loaded attapulgite (APT), polydopamine (PDA) and octadecylamine (ODA). Once the OPA-Ce 3+ coating was corroded, the Ce 3+ adsorbed by the APT were released to form insoluble cerium oxide and hydroxides, thereby inhibiting the penetration of the corrosive substance and preventing further occurrence of corrosion. Furthermore, the OPA-Ce 3+ coating exhibited favorable self-healing ability against chemical damage, which could recover its superhydrophobicity under solar exposure after O 2 plasma etching . The impedance modulus (|Z| 0.01 Hz ) of OPA-Ce 3+ coating was about 3 orders of magnitude higher than that of Mg substrate after being exposed to 3.5 wt% NaCl solution for 15 days, showing outstanding long-lasting anticorrosion performance. Moreover, the abrasion resistance and chemical stability of the as-fabricated coating were also excellent. This work is expected to provide a new perspective for preparing cost-effective and durable anticorrosion coating on metal substrates.
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）