CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Jian Zhou,Changyou Liu,Jinshan Lu
The utilization of granite sludge offers significant economic and environmental advantages. This study focuses on preparing porous glass-ceramics from Ca(OH) 2 -modified granite sludge through a two-step sintering process comprising dense sintering and high-temperature foaming, with the addition of 1 % SiC powder as a foaming agent. The impact of foaming temperature and Ca(OH) 2 addition on the structure, compressive strength , specific strength , and thermal conductivity of the porous glass-ceramics is examined. Incorporating the Ca(OH) 2 modifier reduces the glass's viscosity and effectively eliminates micropores on the pore walls. The former promotes foaming and increases porosity, while the latter increases the specific strength of porous glass-ceramics. Increasing both the foaming temperature and the Ca(OH) 2 concentration reduces glass viscosity and promotes mineral dissolution, facilitating the foaming process. However, the specific strength of the porous glass-ceramics initially increases before decreasing due to pore coalescence and excessive mineral dissolution. Theoretical evaluations of compressive strength and thermal conductivity indicate that porous glass-ceramics possess a closed-cell pore structure . Porous glass-ceramic made from granite powder containing 3.5 % Ca(OH) 2 and foamed at 1240 °C exhibits an apparent density and porosity of 0.73 g/cm 3 and 67.1 %, respectively. The compressive strength and thermal conductivity are 14.2 MPa and 0.422 W/(m·K) respectively, with a peak specific strength of 19.4 kN·m/kg. This innovative process enables the scalable recycling of granite sludge into energy-saving building materials.
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高影响因子
Journal of Physical Chemistry C
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2024
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IF 3.3
Xiao-Cong Ma,Zhou Yu,Ya-Li Zhang,Jian-Ang Jin,Jian-Ping Li,Xu-Liang Fan,Qiang Wan,Ju-Fang Zheng,Xiao-Shun Zhou,Ya-Hao Wang
Nickel foam is a prevalent material for the oxygen evolution reaction (OER) in alkaline media. Herein, we employed a one-step electrodeposition technique to effectively fabricate a Ni(OH)2/Au/nickel foam (denoted as a Ni(OH)2/Au/NF) catalyst. This catalyst exhibits both surface-enhanced Raman scattering (SERS) activity and catalytic activity. The electrochemical SERS technique is employed for in situ monitoring of surface structure changes and intermediates during the OER process. The molecular evidence reveals that the electro-driven initial Ni(OH)2 first becomes disordered and finally is oxidized to NiOOH. When the OER occurs, the active oxygen species of NiOO* is observed to release O2. Compared with that of bare NF, the more disordered NiOOH from Ni(OH)2/Au/NF has a greater OER activity. These findings significantly advance the understanding of the OER mechanism on Ni-based catalysts, providing guidelines for the elaboration and optimization of future catalytic systems.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Baojin Jia,Qianyun Zhou,Leiying Gao,Lulu Wang,Mingyang Liu,Shiwu Xu,Genlin Zhang
The insufficient energy density of electrode materials has hindered the popularity and application of supercapacitors. The construction of hybrid supercapacitors offers an ideal solution by combining transition-metal hydroxides with high specific capacity and biochar with excellent conductivity. In this study, an electrode material (β-Ni(OH) 2 @AC 22 composite) was created by in situ growth flower-like β-Ni(OH) 2 nanosheets on biochar (AC) that extracted from the seed coat of Xanthoceras sorbifolium Bunge . This β-Ni(OH) 2 @AC 22 composite exhibited a remarkable specific capacity of 617.5C g −1 (1 A g −1 ), nearly four times that of AC, and remarkable cycling stability (85.6 % retention after 5000 cycles). Using this composite as the positive electrode and biochar as the negative electrode, the assembled battery-type hybrid supercapacitors (HSCs) achieved a specific capacity of 92.75C g −1 (1 A g −1 ). The HSCs demonstrated a specific energy of 57.9 Wh kg −1 , a specific power of 750.9 W kg −1 , and even maintained 42.2 Wh kg −1 at a maximum specific power of 6049.4 W kg −1 . The device maintained a specific capacity of about 78.7 % after 7000 charging/discharging cycles, demonstrating good practical performance. These results highlight the practical application potential of the prepared composites in supercapacitors, with biochar serving as a basis for enhancing the electrochemical performance of supercapacitors.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
This study successfully synthesized a series of Mn(OH)F hollow structures doped with rare earth elements (Sm, Nd, Ce, and Tb) using a hydrothermal method . A comprehensive analysis was conducted on the influence of these dopant elements on the morphology and gas-sensitive properties of Mn(OH)F. The gas-sensing performance of Mn(OH)F nanomaterials doped with Sm, Nd, Ce, and Tb was extensively investigated at 150℃ for methyl acetate , ethyl acetate , propyl acetate , and butyl acetate . The results demonstrated good gas-sensing capabilities, with responses reaching 2.0, 2.0, 2.0, and 2.5, respectively. Compared to undoped Mn(OH)F nanomaterials , the operating temperature of these sensors was reduced by about 100℃, and the response values were nearly tripled. Exceptional selectivity and stability were also observed. In addition, an in-depth exploration was conducted into the underlying mechanisms behind the enhanced gas response due to rare earth element doping . This study provides strong theoretical support for the development of efficient acetate ester gas sensors, demonstrating broad prospects for their widespread application in the industrial field.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yujiao An,Xiaowan Li,Zihao Liu,Zhilan Wang,Xiaoquan Lu
Quinones, widely considered as environmental pollutants in wastewater, have been identified as redox-active substances capable of activating persulfate for decontamination purpose. However, the mechanism of peroxydisulfate (PDS) activation by quinones under alkaline conditions remains elusive. In this study, methyl- p -benzoquinone (MBQ) was chosen as a model quinone to elucidate the intrinsic mechanism of activating PDS. The results showed that MBQ/PDS system can effectively degrade atrazine (ATZ) under alkaline conditions (especially at pH 10.5) and achieve simultaneous removal of MBQ. Derivatization analysis, quenching experiments and electron spin resonance tests revealed that the self-transformation product of MBQ, methyl-semiquinone radical (MSQ − ), played a major role in activating PDS while alkali served as an auxiliary activator. Specifically, MSQ − functioned as a mediator in PDS activation, regulating the generation of sulfate radical (SO 4 − ) and hydroxyl radical ( OH), thereby inducing the degradation of ATZ through free radical pathways. Two degradation pathways of ATZ were proposed based on UPLC-Q-TOF-MS analysis and DFT calculation. ECOSAR evaluation indicated MBQ/PDS system can detoxify ATZ, yet it remains imperative to concern the formation of more toxic by-products. Furthermore, MBQ/PDS system exhibited strong resistance to water matrixes (excluding Cl − ) and favorable degradation capabilities towards diverse contaminants. This work broadened the possibility of applying the persulfate system in actual water bodies with alkaline environments, achieving the dual benefit of degrading target contaminants and simultaneously removing the activator quinones themselves, providing a novel “treating pollution with waste” water treatment strategy.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2025
·Vol. 27
·期 2
·1-15
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IF 2.6
Hui Xianghe,Fang Dong,Wang Guifang,Ran Feng,Zhang Xin,Fu Zewei,Ruzimuradov Olim
Perovskite hydroxystannate (MSn(OH) 6 ) has garnered considerable interest in recent years as a novel flame retardant characterized by its low toxicity and environmentally benign properties. In order to improve the flame retardancy and smoke suppression properties of epoxy resin (EP) matrices, transition metal hydroxystannate (MSn(OH) 6 , M = Fe, Co, Mn) was prepared by a ultrasonic-coprecipitation method and used as flame retardants. The synthesized composites were assessed for their flame retardant characteristics and mechanical properties through the measurement of the limiting oxygen index (LOI), the cone calorimetry test (CCT), and universal tensile testing. Upon the incorporation of 10 wt% of the MSn(OH) 6 flame retardants, the flame retardant of EP composites exhibited marked enhancement, especially manganese hydroxystannate (MHS). Compared with pure EP, the EP/MHS-10 composite demonstrated the best performance, reducing the peak of heat release rate (pHRR), total heat release (THR), total smoke production (TSP) by 60.0%, 14.4%, and 32.6%, respectively. During the process of combustion, the decomposition of MSn(OH) 6 results in the generation of non-flammable gases and water vapor. In the condensed phase, tin (Sn) and transition metals contribute to the formation of a more protective char residue. The residue serves as a physical barrier, effectively isolating the underlying epoxy (EP) matrix material from heat and oxygen.
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高影响因子
Journal of Energy Storage
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2025
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IF 9.8
Yuan Yao,Xikun Tian,Jun Yan,Changying Zhao
In light of the widespread adoption of novel energy sources, there is a pressing need for the rapid development of long-term energy storage technologies. While most existing energy storage technologies are prohibitively expensive, the thermochemical energy storage (TCES) system based on CaO/Ca(OH)₂ offers a high storage density of 1400 kJ/kg, low costs, and excellent cycle stability. The choice of expanded graphite (EG) as the matrix is based on its outstanding thermal conductivity and rich microstructure, which enhance heat and mass transfer. This study focuses on the thermochemical properties of Ca(OH)₂ doped by expanded graphite with stable morphology. Five samples with EG contents were synthesized, and characterized with regard to their microstructures, and their thermal and physical properties examined. Additionally, a reaction kinetic analysis of the thermal decomposition process was conducted. The results indicate that the composite with 9 % EG content stands out as the optimal thermal storage material, exhibiting a thermal conductivity of 2.5 W/(m·K), almost three times that of pure material. The activation energy of the composite was calculated to be 166.9 kJ/mol and the pre-exponential factor is 5.5 × 10 11 1/s which is two orders of magnitude higher than the pure. Furthermore, the composite demonstrated exceptional stability during cyclic performance tests, maintaining a conversion rate of 70 % after 10 cycles, confirming its reliability. In conclusion, this research presents a novel approach for the large-scale, low-cost application of TCES in CaO/Ca(OH)₂ systems.
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Zhijian Chen,Zhenghui Ma,Wenlin Yang,Guoli Fan,Baoming Ren,Feng Li
Due to the high energy barrier of C-C coupling and the intense competition from by-products, achieving superior ethylene selectivity in electrochemical CO2 reduction reaction (eCO2RR) remains challenging. Herein, we reported a distinctive Cu-based electrocatalyst fabricated from a three-dimensional (3D) tentacle-like Cu2(OH)2CO3 precursor. After electrochemical activation, abundant surface structural hydroxyls chemically bonded to Cu+ species (Cu+-OH structures) formed on the resulting Cu-based electrocatalyst. Such structural hydroxyl-rich Cu-based catalyst exhibited excellent eCO2RR performance, with a Faradaic efficiency (FE) of 43.7% for ethylene (partial current density up to 130.6 mA·cm-2) and a FE of ~70% for C2+ products at -1.5 V vs RHE in a flow cell, far exceeding those over the hydroxyl-deficient Cu-based one. By combining operando spectroscopic analysis with density functional theory calculations, it was unveiled that inherent surface Cu+-OH structures over Cu-based electrocatalysts could result in the electron loss of neighboring active Cu0 sites, which was favorable for the creation of crucial *COH and *OCCOH intermediates and thus the formation of ethylene product. Consequently, dual reaction pathways for the eCO2RR based on both key *COH and *CHO intermediates coexisting on the Cu-based electrocatalyst with abundant Cu+-OH structures powerfully boosted electrochemical CO2 reduction to produce ethylene. This work presents an innovative strategy for the construction of Cu-based electrocatalyst rich in structural hydroxyls and highlights the crucial role of inherent Cu+-OH structures in switching the formation of intermediates to boost ethylene production in the eCO2RR.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 20
·1-13
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IF 2.8
Xie Linqiang,Ding Jiangtao,Liu Han,Lu Di,Yu Wanchun,Hu Te,Lin Jiayang,Cheng Zhenzhi,Gao Fei,Luo Guangsheng,Zhou Weiping
Soft magnetic composites with enhanced permeability and reduced power loss are urgently needed in the next generation of power electronics and electrical machines. However, traditional insulation techniques suffer from the uneven coating or complex process, which cannot meet these requirements. Here, the feasibility of Ba(OH) 2 as a coating layer of soft magnetic powder is explored. Due to its low melting point, Ba(OH) 2 exhibits good flowability in the molten state, enabling it to evenly coat FeSiAl particles and fill interparticle gaps, thereby forming a uniform, dense insulating layer. This novel coating strategy improves the formability of the magnetic powder cores and optimizes the cores’ soft magnetic performance. Compared with SMPCs without Ba(OH) 2 coating, FeSiAl@Ba(OH) 2 SMPCs have higher magnetic permeability (μ e = 59.5), higher quality factor ( Q max = 127.3), lower high-frequency power loss ( P cv = 2062.9 mW/cm 3 @1 MHz and 50 mT), and good DC bias performance. Our results provide a new approach for the design of insulation coatings for SMPCs, demonstrating significant application potential for high-frequency electronic devices.
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高影响因子
JOURNAL OF ENDOCRINOLOGICAL INVESTIGATION
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2025
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IF 3.5
Liang Yongchao,Huo Hongjin,Wei Wei,Wang Dongxuan,Lu Jingjing,Yi Wenjie,Jiang Fei
Purpose Perfluorooctane sulfonic acid (PFOS) is a representative persistent organic pollutant that has been shown to impair male reproductive function. Epidemiological studies and animal models suggest that vitamin D may modify male reproductive function. However, whether 1α,25(OH) 2 D 3 could mitigate the PFOS-induced damage of Sertoli cells, and the underlying mechanisms remain poorly defined. Methods Mouse Sertoli cell line TM4 were pretreated with or without 10 nM or 100 nM 1α,25(OH) 2 D 3 for 6 h, followed by 100 µM or 200 µM PFOS for 24 h. Cell viability was assessed using the CCK8 assay. Reactive oxygen species (ROS) were detected by fluorescent staining, while malondialdehyde (MDA), superoxide dismutase (SOD), and glutathione (GSH) levels were measured using commercial kits. siRNA transfection, quantitative real-time PCR (qRT‒PCR), and Western blotting were performed to elucidate the underlying mechanisms. Molecular docking studies were conducted to explore the potential binding of PFOS to Keap1. Results PFOS increased MDA contents, decreased GSH levels, and induced cytotoxicity in mouse Sertoli cells. Mechanistically, PFOS might directly bind to Keap1, facilitating its degradation, leading to persistent activation of the Nrf2-ARE pathway. Conversely, 1α,25(OH) 2 D 3 attenuated PFOS-induced cytotoxicity by alleviating the Nrf2-ARE pathway, a protective effect which was abolished by vitamin D receptor (VDR) knockdown. Conclusion PFOS induces cytotoxicity in Sertoli cells by binding to Keap1 and persistently activating the Nrf2-ARE pathway. 1α,25(OH) 2 D 3 emerges as a promising candidate for mitigating PFOS-induced testicular dysfunction. Graphical abstract
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
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IF 8.1
Cengceng Du,Zhenyu Wang,Xin Chen,Yiming Wang,Chen Chen,Xinyu Liu,Yuqiu Huo,Hongbin Sun,Guangwen Xu
The efficient and high-quality production for hydrogen through water electrolysis at high current densities is crucial for commercial utilization. However, the performance of existing hydrogen evolution reaction (HER) electrocatalysts is far from satisfactory. In this regard, we proposed a method to prepare Rh–Ni(OH) 2 catalyst based on Nickel foam (NF). The hydrolysis galvanic replacement of nickel boride with RhCl 3 led to produce a lattice contraction in Ni(OH) 2 due to the rigid pressure generated, resulting in outstanding HER performance at high current densities. It achieves an industrial current density of 500 mA cm −2 with an overpotential of 130 mV. Furthermore, at the industrially prefer temperature of 80 °C, only 67 mV overpotential is required. The catalyst also demonstrated exceptional stability, maintaining excellent performance even after a stability test of 100 days with a current density of 200 mA cm −2 . Through Density-functional theory (DFT) calculations, Rh series reduced the hydrogen adsorption free energy.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhengda Lin,Yijun Liu,Zhongming Zhang,Jie Yao
In this study we used a high-temperature steam-induced hydrolysis method to obtain a fluorinated OH/SiO 2 -TiO 2 /polyethersulfone (PES) composite hollow fiber membrane for CO 2 capture. The purpose of grafting SiO 2 and TiO 2 on the surface of PES by hydrolyzing silicon precursors and titanium precursors at high temperature, is to improve the alkali corrosion resistance and hydrophobicity of the PES membrane. The OH/SiO 2 -TiO 2 /PES composite hollow fiber membranes prepared by the high-temperature steam-induced hydrolysis method and the graft coating method were measured by SEM, EDS , FTIR, WCA, AFM , XRD and XPS in order to characterize the morphology and structure of the prepared membranes. In the CO 2 /CH 4 separation performance test experiment, the OH/SiO 2 -TiO 2 /PES membrane prepared by the high-temperature steam hydrolysis method showed better separation performance than the original PES membrane. The effects of absorbent flow rate, absorbent concentration and feed gas flow rate on CO 2 flux and CO 2 /CH 4 were selectivity investigated. When the flow rate of the absorbent (DEA) reached 16 L/h, the flow rate of the feed gas (CO 2 /CH 4 = 40 : 60) was 30 ml/min, the concentration of the absorbent was 1 mol/L, The CH 4 concentration was 99.88 % and the optimal separation factor was as high as 554.89. In general, the results obtained in this work may provide promising insights into the use of fluorinated OH/SiO 2 -TiO 2 /PES composite membranes for carbon capture and CO 2 /CH 4 separation in GLMC application.
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高影响因子
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