Case Studies in Construction Materials
·
2025
·
IF 6.6
Yibing Yu,Shaojun Zheng,Tianle Liu,Mingsheng Chen,Wenqiang Lou,Xi Wang
This study elucidates the hydration characteristics and durability modulation mechanisms of cement paste subjected to the combined influences of low-temperature curing and sulfate attack, focusing on the synergistic role of a CaCl 2 –BaCl 2 binary admixture system. CaCl 2 acted as a cryoprotectant, accelerating hydration under subzero conditions by promoting Friedel’s salt formation, which in turn enhanced early-age strength development. At an optimized dosage of 12.5 % CaCl 2 , the 54-day compressive strength exhibited an 86.99 % improvement compared with the control, verifying its hydration-promoting efficiency. The co-incorporation of BaCl 2 further contributed to durability enhancement through a dual-protection mechanism: externally, Ba 2 + reacted with SO 4 2- to form dense BaSO 4 barrier layers that hindered ionic penetration; internally, Ba 2+ consumed infiltrating SO 2- , suppressing the generation of expansive phases such as gypsum and ettringite. This process effectively alleviated sulfate-induced deterioration while simultaneously maintaining hydration continuity under freezing conditions. Although CaCl 2 addition facilitated faster ion migration during subzero curing, this effect diminished during subsequent ambient-temperature exposure, as hydration recovery occurred in reference samples. Nevertheless, excessive CaCl 2 led to structural degradation through dissolution channel formation and crystallization stress-induced microcracking, underscoring the importance of dosage control. Overall, the combined use of CaCl 2 and BaCl 2 was shown to significantly enhance both low-temperature hydration kinetics and long-term sulfate resistance. The findings provide valuable theoretical insight and practical guidance for the durability design of cementitious materials exposed to aggressive sulfate-bearing permafrost environments.
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高影响因子
APPLIED THERMAL ENGINEERING
·
2017
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IF 3.444
Jotham Muthoka Munyalo,Xuelai Zhang,Yuyang Li,Yue Chen,Xiaofeng Xu
This paper presents a study on the effect of mass fraction of nanoparticles, cooling rates and prediction of latent heat of fusion for Barium Chloride Dehydrate solutions (BaCl 2 ·2H 2 O) by separately adding a mass fraction of 0.2 wt%–1 wt% magnesium oxide (MgO) and multi-walled carbon nanotubes (MWCNTs) and various cooling rates applied. The data was then compared with existing prediction model and a new correlation developed. The results show that the latent heat of fusion reduced by 7% and 5.2% for MWCNT and MgO nanofluids respectively at a mass fraction of 1 wt% and at a cooling rate of 5 °C/min. Mass loss equation maximum deviation was 5.55% and 4.16% for MWCNT and MgO nanofluid respectively at a mass fraction of 1 wt% and at a cooling rate of 5 °C/min. The new correlation maximum absolute deviation was 1.2% at a mass fraction of 0.4 wt% and at a cooling rate of 5 °C/min for MWCNT nanofluid while for MgO nanofluid, the deviation was 1.7% at a mass fraction of 1 wt% and at a cooling rate of 10 °C/min confirming the accuracy of the new correlation and therefore can be applied to predict the latent heat of fusion of any nanofluid.
研究领域:
材料科学
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热能工程
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纳米技术
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高影响因子
PHARMAZIE
·
2021
·Vol. 76
·期 10
·499-502
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IF 1.267
Tao Lijun,Chen Lina,Pei Yanmin,Ma Ping,Xu Qingbin,Wang Jialing,Yu Yang,Cheng Jiang,Zhou Ru
The aim of this study was to investigate the vasodilatory effects of betaine, an alkaloid isolated from Lycium barbarum, on isolated pulmonary artery rings in rats and its possible mechanisms. Pulmonary vessels of normal Sprague–Dawley rats were isolated and pre-contracted
using norepinephrine. Then, betaine was cumulatively added in differing concentrations (0.02-0.14 mg/mL), and the tension curve was observed and recorded. Changes in the tension of the pulmonary artery rings with an intact endothelium and a dissected endothelium were recorded. The interactions
among betaine and NG-nitro-L-arginine methyl ester, indomethacin, 4-aminopyridine, barium chloride, and glibenclamide were evaluated. The experimental results show that betaine can relax the pulmonary artery rings pre-contracted by norepinephrine. Furthermore, pre-incubation with NG-nitro-L-arginine
methyl ester and indomethacin did not inhibit betaine vasodilation, demonstrating that vasodilation by betaine is endothelium-dependent. Additionally, pretreatment of pulmonary artery rings with 4-aminopyridine and glibenclamide had no effect on betaine. However, pretreatment of pulmonary
artery rings with barium chloride attenuated the effects of betaine. In conclusion, the vasodilatory effects of betaine on pulmonary artery rings is associated with inward rectifier potassium channels.
研究领域:
药理学
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心血管研究
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yilong Zhu,Huifang Xing,Shan Ni,Ke Xu,ZhaoXiang Zhong,Liangrong Yang
The recycling of precious materials, such as palladium (Pd), was repeatedly documented as essential for a sustainable future with respect to the environment and energy production. However, high-efficiency extraction presented significant challenges. In this work, a surface hydroxyl regulation strategy was used to prepare a defective carbon nitride (CN) with a high specific surface area and hierarchical porosity through cobalt (Co)-doping. Characterization confirmed the successful synthesis of the adsorbent. The results indicated that the optimal pH for the adsorption process was 5.5, adsorption kinetics and isotherms of Pd on the adsorbent suggested that the adsorption followed a pseudo-second-order model and the Langmuir model, respectively. The maximum adsorption capacity reached up to 529.1 mg·g –1 . In addition, it showed high affinity for Pd ions, the K d value was 4.1 × 10 4 ml·g –1 . After Pd adsorption, due to the presence of abundant and uniformly dispersed Pd and Co particles which further facilitated cooperative catalysis on the surface of adsorbent, As a result, the Co-CN-Pd was reused as a catalyst for p-nitrophenol hydrogenation. It achieved a turnover frequency (TOF) as high as 1032.6 h –1 , significantly surpassing other catalysts reported in the literature. Overall, this novel adsorbent presented broad application prospects in the field of Pd recovery and reuse.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Bin Liu,Xinyue Cui,Xiaozhen Lu,Xuewu Zhu,Lin Wang,Junyong Zhu
Positively charged polyamide (PA) nanofiltration (NF) membranes with sub-nanopores show promise for lithium extraction from salt-lake brines with high Mg 2+ /Li + ratios. This study introduces the use of triamino guanidine (TG), a highly positively charged molecule, to regulate grafting on monolayer PA membranes, resulting in dual-layer (PEI-TMC-TG) NF membranes. The monolayer PA membranes were created via spin-coating assisted interfacial polymerization between polyethyleneimine (PEI) and tricarbonyl chloride (TMC). The PEI/TMC-TG NF membranes exhibited several advantages over unmodified PEI-TMC NF membranes, including higher positive charge density, narrower pore size distribution, excellent hydrophilicity, and a more porous separation layer microstructure. Experimental results indicated that enhanced Donnan effect, size sieving, and dielectric repulsion within the sub-nanopores contributed to exceptional Li + /Mg 2+ selectivity during filtration of East Taijiner brine (S Li + /Mg 2+ = 64.5). Furthermore, the TG hydrophilic layer significantly improved water permeability (15.4 LMH/bar) and long-term stability. To reduce membrane fouling in the charge-positive NF process by removing organic matter from complex salt lake brine, we explored electrocoagulation as a pre-treatment method and identified optimal conditions for the EC-NF process. This strategy maximizes sustainable lithium recovery from brine in an economically viable green manner while enhancing the efficiency of NF membranes for lithium extraction from salt lakes.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenjie Ye,Liucheng Meng,Jianfeng Xi,Huiyang Bian,Zhaoyang Xu,Huining Xiao,Lei Zhang,Weibing Wu
Elastic carbon aerogels have promising applications in the field of wearable sensors. Herein, a new strategy for preparing carbon aerogels with excellent compressive strength and strain, shape recovery, and fatigue resistance was proposed based on the structure design and carbonization optimization of nanocellulose-based precursor aerogels. By the combination of directional freezing and zinc ion cross-linking, bacterial cellulose (BC)/alginate (SA) composite aerogels with high elasticity and compressive strength were first achieved. The existance of zinc ions also significantly improved the carbon retention rate and inhibited structural shrinkage, thus making the carbon aerogels retain ultra-high elasticity and fatigue resistance after compression. Moreover, the carbon aerogel possessed excellent piezoresistive pressure sensing performance with a wide detection range of 0–7.8 kPa, high sensitivity of 11.04 kpa -1 , low detection limit (2 % strain), fast response (112 ms), and good durability (over 1,000 cycles). Based on these excellent properties, the carbon aerogel pressure sensors were further successfully used for human motion monitoring, from joint motion to and speech recognition.
研究领域:
材料科学
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纳米技术
·
传感器
·
可穿戴技术
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PubMed
高影响因子
BIOMATERIALS
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2025
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IF 12.9
Yong Liu,Bowen Li,Run Yang,Chenxu Shang,Yang Bai,Bin Zheng,Liang Zhao
Lysosomes play a crucial role in regulating cancer progression and drug resistance. However, there is a pressing need for the development of drugs that can safely and effectively modulate the pH of cancerous lysosomes in a controlled manner. In this study, we propose a novel strategy for lysosomal alkalinization triggered by piezoelectricity. Our findings indicate that the electrons generated by (BaTiO 3 /Zr/Ca) BCZT under sonication effectively alkalinize the lysosomes. Molecular dynamics simulations further demonstrate that alterations in lysosomal pH lead to modifications in the conformation of V-ATPase (proton pump), enhancing its interaction with sodium ions while partially excluding hydrogen ions from entering the lysosomes. This mechanism helps maintain lysosomal alkalization, resulting in reduced hydrolase activity and preventing the degradation of proteins and damaged organelles. The accumulation of nanoparticles within the lysosomes causes swelling and gradual destruction of the lysosomal membrane. Consequently, this lysosomal dysfunction hampers the fusion with autophagosomes, inhibiting autophagy in tumor cells and promoting apoptosis in various tumor types. Our strategy significantly inhibited tumor volume growth in mice during animal studies. In conclusion, our piezoelectric-triggered lysosomal alkalinization strategy holds promise for innovative breakthroughs in the treatment of multiple cancers.
研究领域:
生物医学工程
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癌症研究
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细胞生物学
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PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Jiang Wu,Hao Ye,Elric Zhang,Ni Qin,Jiawei Liu,Zihan Kang,Minmin Mao,Kanghui Ke,Enzhu Lin,Semih Sevim,Salvador Pané,Dinghua Bao
Piezocatalysis triggered by ultrasonic vibration has emerged as an effective strategy to address the widespread environmental challenges and human health concerns. Nevertheless, the pursuit of high-performance piezoelectrics that can simultaneously realize catalysis and biotherapy still poses a significant challenge. Herein, we report a notable enhancement in piezocatalytic performance of BaTiO 3 nanoplates featuring highly exposed {001} facets. By controlling the exposure of polar facets, BaTiO 3 with highly {001} facets (I {001} /I {110} = 4.17) exhibits an impressive 1500 % improvement in degradation efficiency compared to BaTiO 3 with less-exposed {001} facets (I {001} /I {110} = 0.76). Through in vitro ultrasonic stimulation, BaTiO 3 also demonstrates a remarkable ability to regenerate neurons, facilitating the rapid differentiation of neural progenitor cells into mature neurons. The mechanism of how polar facets enhance the piezocatalytic activity is systematically investigated by finite element method (FEM) simulation and density functional theory (DFT) calculations, revealing that the enhancement stems from the abundant active sites and strong charge transfer ability. This study thus offers a comprehensive understanding of the relationship between polar facets and piezocatalytic performance, also providing inspiration for the development of high-performance piezoelectric medicine for nerve repair.
研究领域:
材料科学
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纳米技术
·
催化
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生物医学工程
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再生医学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ying Wang,Gaoyuan Gu,Ying Cheng,Chong Peng,Shuyi Yang,Yun Li,Changlong Bi,E. Tao
In this study, an alkaline earth metal doped molybdenum disulfide composite (AEM@MoS 2 , AEM = Ca, Sr, Ba) was presented, which can convert the desolvation process from non-spontaneous to spontaneous during heavy metal adsorption. The doping of MoS 2 by AEM not only increases the ratio of surface-active phases, but also modulates the energy band structure, so that Pb 2+ in solution was spontaneously exposed from the hydrated clusters and was more easily adsorbed on the AEM@MoS 2 surface. Among them, the maximum adsorption amount of Ba-MoS 2 reached 147.84 mg/g and the selectivity coefficient for Pb 2+ was as high as 254.58. The precipitation experiments yielded a Pb 2+ precipitation rate of 10.94 % under the condition of pure water, and molecular dynamics simulation (MD) yielded the diffusion coefficient of Pb 2+ being adsorbed on the surface of Ba-MoS 2 to be only 2.00 × 10 -4 Å 2 ·ps −1 . It was verified that it has excellent anchoring ability for Pb 2+ and effectively avoids the secondary pollution caused by desorption. This work can provide a new idea for improving the mechanism of the heavy metal hydrated ion adsorption process.
研究领域:
材料科学
·
环境科学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mingfang Ma,Xinran Liu,Liuyang Dong,Ya Huang,Yingle Li,Huiyuan Chen,Ruibin Lan,Aiyou Hao,Zengyang Xie,Wenqing Shang
As a natural cyclic oligosaccharide , β-Cyclodextrin with cavity structure has excellent water solubility and biocompatibility , which makes it highly valuable in the field of supramolecular self-assembly. Although the self-assembly of β-Cyclodextrin into supramolecular gels has been reported by our group, the impact of metal ions on β-Cyclodextrin supramolecular gels has not yet been studied. Herein, a β-Cyclodextrin supramolecular gel was prepared firstly and then the effects of six different metal ions on this gel system were investigated systematically. It was found that tubular stacking induced by hydrogen bond is the main driving force for the self-assembly of β-Cyclodextrin into β-Cyclodextrin supramolecular gels. Moreover, the introduction of metal ions did not hinder the formation of β-Cyclodextrin supramolecular gels. On the contrary, the metal coordination interaction between metal ions and β-Cyclodextrin stabilized the tubular stacking state of β-Cyclodextrin, thereby promoting the formation of β-Cyclodextrin supramolecular gels. This research not only deepens the study of β-Cyclodextrin supramolecular gels but also lays a solid foundation for their application in intelligent materials, drug delivery, and ion channels, among other fields.
研究领域:
材料科学
·
生物化学
·
药物递送
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yu Yao,Chengqi Lu,Qianhong Shen,Yijin Yang,Kaiyue Huang,Libei Jiang,Jie Liu,Yue Li,Xudan Cao,Hui Yang
A novel ternary composite photocatalyst of nitrogen-doped carbon quantum dots (NCQDs)/tetrapods silver phosphate (Ag 3 PO 4 )/silver (Ag) nanoparticles was designed and fabricated. Kelvin probe force microscopy and in-situ irradiated X-ray photoelectron spectrum demonstrated the cooperative action between the S-scheme heterojunction and Schottky junction within this ternary composite system, which facilitate efficient dual-channel charge transfer and achieve high oxidation potential. Moreover, the incorporating of persulfate into the photocatalytic reaction system enhanced the capture of photogenerated electrons, while the generated SO 4 -· radicals further improved photocatalytic reaction efficiency. Consequently, the NCQDs/Ag 3 PO 4 /Ag photocatalyst exhibited remarkable photocatalytic performance for the removal of ciprofloxacin (CIP). The mineralization rate of CIP over NCQDs/Ag 3 PO 4 /Ag photocatalyst activated by persulfate was about 6.7 times greater compared to the bare Ag 3 PO 4 photocatalyst. Additionally, four potential pathways for the photocatalytic degradation of CIP were proposed utilizing the LC-MS analysis. Furthermore, this ternary composite photocatalyst not only demonstrated high cyclic stability but also exhibited robust photocatalytic activity in systems containing coexisting anions, cations or various natural water sources, thereby exhibiting its application potential for antibiotic degradation in real environmental settings.
研究领域:
环境科学
·
材料科学
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高影响因子
ACS Nano
·
2024
·
IF 15.8
Hualei Liu,Xiaodan Huo,Peili Zhao,Ruixiang Xu,Xinxin Zhang,Jianyong Yu,Yi-Tao Liu,Bin Ding
Barium aluminate (BAO) ceramics are highly sought after as a kind of high-temperature refractory material due to their exceptional thermal stability in both vacuum and oxygen atmospheres, but their inherent brittleness results in rapid hardening, imposing a negative impact on the overall construction performance. Here, we report a strategy to synthesize flexible BAO nanofibers with a needle-like structure through confined-gelation electrospinning followed by in situ mineralization. The confined gelation among the colloidal particles promotes the formation of precursor nanofibers with high continuity and a large aspect ratio. The resulting flexible BAO nanofiber membranes are bendable, stretchable, and can even be woven, exhibiting a softness (12 mN) that is lower than that of tissue paper (27 mN). Additionally, they are capable of withstanding hundreds to thousands of continuous buckling and bending at 50% deformation without tearing. More importantly, the low emissivity of the flexible BAO nanofiber membranes ensures excellent thermal insulation at 1300 °C while preserving structural integrity and performance stability. In this sense, our strategy can be easily scaled up to produce flexible yet tough oxide ceramic membranes for a wider range of applications.
研究领域:
材料科学
·
无机化学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）