CONSTRUCTION AND BUILDING MATERIALS
·
2018
·
IF 3.485
Lei Cao,Jintang Guo,Jianhua Tian,Yang Xu,Miaomiao Hu,Meiyu Wang,Jinjie Fan
Ca/Al-Layered Double Hydroxide (Ca/Al-LDH), was a kind of important anionic clays with broad applications owing to its properties of exchangeable anion and adjustable particle size. In this study, Ca/Al-LDH had been successfully prepared by co-precipitation method, and it was found that the particle size, crystallinity and morphology of Ca/Al-LDH could be tuned via changing ethanol/water ratio of solution. More interestingly, with the increase of the Ca/Al-LDH’s dosage, the different crystal structure of Ca/Al-LDH had promoting effect on the development of the early strength of the cement slurries, however, the change trend of the strength growth rate of various kinds of cement slurries were quite different. Meanwhile, experimental results disclosed that the crystallinity and particle size of Ca/Al-LDH determined its interaction with cement hydration particles. That was likely to lead to a change in tricalcium silicate (C 3 S) and tricalcium aluminate (C 3 A) hydration process of accelerating or retarding under the different Ca/Al-LDH content, thus enabling the early strength development of slurry to exhibit different trends. And this finding could provide further interpretation for the effect of hydrotalcite-like materials on cement hydration process and offer a theoretical exploration for its practical application in the future.
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高影响因子
JOURNAL OF LUMINESCENCE
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2021
·
IF 3.599
Zhongxu Han,Shuchen Lü,Qingyu Meng,Mengsi Sun,Yandong Ren
Ca(MoO 4 ) 0.8 (WO 4 ) 0.2 :xDy 3+ , yEu 3+ samples were successfully synthesized via co-precipitation method. XRD patterns, emission spectra , excitation spectra , decay curves and temperature-dependent emission spectra were adopted to represent the performance of the samples. The results displayed that the samples prepared performed scheelite structure with tetragonal system . Under the excitation of 353 nm, the samples presented strong emission at 487 nm, 573 nm, and 615 nm. The energy transfer of Dy 3+ → Eu 3+ was found from the excitation spectra, emission spectra and decay curves and its mechanism was discussed. The results suggested the luminescence intensity of the sample Ca 0.835 (MoO 4 ) 0.8 (WO 4 ) 0.2 :0.03Dy 3+ , 0.08Eu 3+ with charge compensation was obviously enhanced to 2.75 times than that of the sample Ca 0.89 (MoO 4 ) 0.8 (WO 4 ) 0.2 :0.03Dy 3+ , 0.08Eu 3+ without charge compensation. The QY of the samples were also been increased by 7.6% via charge compensation. At 523 K, the sample maintained a quite strong emission intensity and exhibited excellent thermal stability. The thermal stability of the samples with charge compensation was greater than that without charge compensation. The maximum relative sensitivity was 0.6% K −1 with Dy 3+ concentration being 0.03, Eu 3+ concentration being 0.05 at 423 K. Ca(MoO 4 ) 0.8 (WO 4 ) 0.2 :xDy 3+ , yEu 3+ were proved to be a luminescence material with great application prospects.
研究领域:
材料科学
·
发光材料
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固态化学
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光学材料
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荧光粉
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2021
·Vol. 27
·期 55
·13819-13827
·
IF 5.236
Pan Liang,Wen-Li Lian,Zhi-Hong Liu
Highly efficient inorganic phosphors are crucial for solid-state lighting. In this paper, a new method of low-temperature self-reduction was used for preparing a highly efficient deep blue-emitting phosphor of Ca[B 8 O 11 (OH) 4 ] : Eu 2+ (CBH : Eu 2+ ). The crystal structure, morphology, chemical state, and photoluminescence (PL) properties of the CBH : Eu 2+ phosphor have been investigated. By using the screened hybrid function (HSE06), the band gap ( E g ) of CBH was calculated to be 7.48 eV, which is a necessary condition for achieving high quantum yield phosphors. The experiment results show that almost all the added raw materials of Eu 3+ can be reduced to Eu 2+ in CBH crystal under a non-reducing atmosphere. The CBH : Eu 2+ phosphor shows a broad excitation spectrum centered at 277 and 327 nm in the range of 220 to 400 nm, and a narrow-band emission spectrum centered at 428 nm in the range of 400 to 500 nm, with a full width at half maximum (fwhm) of 42.35 nm. Under UV radiation, the CBH : 2 %Eu 2+ exhibits high photoluminescence quantum yield (PLQY=95.0 %), high external quantum efficiency (EQE=31.1 %), and ultra-high color purity (97.6 %). The PL intensity of CBH : 2 %Eu 2+ remains 62.6 % of the initial intensity at 150 °C. Finally, the white light-emitting diodes (WLED) fabricated by CBH : 2 %Eu 2+ , excited by a 365 nm chip, presents outstanding performances with a luminous efficacy (LE) of 13.9 lm/W, a color rendering index (CRI) of 89.4, and a correlated color temperature (CCT) of 5825 K. The above results show that CBH : Eu 2+ can be used as a promising blue phosphor for WLED. This new method of low-temperature self-reduction can be applied to design and prepare other new types of highly efficient phosphors. Graphical Through a new method of low-temperature (only 350 °C) self-reduction, a highly efficient deep blue-emitting phosphor Ca[B 8 O 11 (OH) 4 ] : Eu 2+ was prepared, with a high PLQY of 95 % and a color purity of 97.6 %. Then, a WLED fabricated by the as-prepared CBH : 2 %Eu 2+ presents outstanding performance with a luminous efficacy (LE) of 13.9 lm/W, a color rendering index (CRI) of 89.4, and a correlated color temperature (CCT) of 5825 K.
研究领域:
材料科学
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光学材料
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固态照明
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荧光粉化学
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发光学
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DOI
高影响因子
BIOELECTROCHEMISTRY
·
2018
·
IF 3.789
Qiang Yuan,Y. Huang,Debao Liu,Minfang Chen
Biodegradable beta-tricalcium phosphate (β-TCP) particle reinforced magnesium metal matrix composites (Mg-MMC) have attracted increasing interest for application as implant materials . This investigation was conducted to study the effect of cooling rate on the microstructure and corrosion behavior of a biodegradable β-TCP/Mg-Zn-Ca composite. The composite was fabricated under a series of cooling rates using a wedge-shaped casting mold. The microstructure of the composite was examined by optical and scanning electron microscopy, and the corrosion behavior was investigated using an electrochemical workstation and immersion tests in a simulated body fluid (SBF). Faster cooling rates were shown to refine the secondary phase and grain size, and produce a more homogenous microstructure. The refined microstructure resulted in a more uniform distribution of β-TCP particles, which is believed to be beneficial in the formation of a stable and compact corrosion product layer, leading to improved corrosion resistance for the composite.
研究领域:
材料科学
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生物医学工程
·
腐蚀科学
·
金属基复合材料
·
生物材料
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DOI
高影响因子
DENTAL MATERIALS
·
2026
·
IF 6.3
Yun Ouyang,Jinwen Wang,Jiali Ma,Jian Yu,Huan Zhou,Lei Yang,Guohua Yuan
Polyphosphate is incorporated into Calcium Hydroxide to prepare a modified paste (CH-PP-I). • CH-PP-I exhibits sustained ion release properties (Ca 2+ , OH - ). • CH-PP-I has less volume loss compared to Vitapex. • CH-PP-I has better antimicrobial activity and a lower degradation rate than CH-I and Vitapex. • CH-PP-I can be a promising filling paste for primary teeth. Objectives Calcium Hydroxide/Iodoform pastes (CH-I) are used for pulpectomy in primary teeth. To alleviate the rapid degradation of CH-I, polyphosphate (poly P) was incorporated with CH to form a modified paste (CH-PP-I), which was evaluated against CH-I and a commercial paste (Vitapex®). Methods Vitapex, CH-I and CH-PP-I were compared for injectability, viscosity, pH, Ca 2 + release and solubility. Antimicrobial properties of the pastes were tested using Enterococcus faecalis (E. faecalis). Their effects on human periodontal ligament cells (hPDLCs) were explored using CCK-8, Edu and TUNEL assays. Their impact on osteogenic and osteoclastic differentiation was detected on dental follicle stem cells (DFSCs) and bone marrow mononuclear cells (BMMs). The test materials were implanted subcutaneously to assess in vivo biocompatibility and degradation rates. Results CH-PP-I released calcium more slowly and consistently than CH-I. CH-PP-I showed superior bacteriostatic properties than Vitapex, similar to CH-I. CH-PP-I exhibited lower cytotoxicity on hPDLCs compared to Vitapex and CH-I, with cell proliferation and apoptosis barely affected. CH-PP-I also promoted osteogenic differentiation of DFSCs and inhibited osteoclast differentiation of BMMs. Subcutaneous implantation revealed moderate inflammation in CH-PP-I and CH-I groups, while severe inflammation in the Vitapex group on day 15. After 60 days, all groups showed mild to moderate inflammation, and CH-PP-I had the lowest degradation rate on day 90. Significance CH-PP-I exhibited more excellent antimicrobial activity and a lower degradation rate than CH-I and Vitapex, highlighting its potential as a promising filling paste for primary teeth.
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Khurram Shehzad,Tianying Wan,Shuxin Tu,Zhiheng Wang,Waqar Ali,Saireen Ahsen,Saba Babar,Jie Zhang
Dodecamethylcyclohexasiloxane (D6) is a cyclic organosilicon monomer widely used in consumer and industrial products and is increasingly detected in environmental and biological systems. Previous studies have shown that D6 modulates the ecological behavior of the heavy metal cadmium (Cd) in soil and reduces Cd accumulation in plants; however, D6-mediated stress responses to Cd in animals and their underlying mechanisms remain inadequately explored. This study reveals that D6 exerts multi-layered protective effects against Cd toxicity in Caenorhabditis elegans . Cd exposure significantly reduced lifespan, brood size, locomotion, and growth, whereas D6 co-treatment (Cd_D6) improved survival by 20%, increased brood size from 64 ± 4.37–90 ± 1.53 eggs, and partially restored locomotor activity. D6 also reduced germline apoptosis and decreased internal Cd accumulation by more than 30%, while stabilizing Ca homeostasis. Biochemically, D6 reversed Cd-induced declines in glucose, pyruvate, and ATP levels, restored mitochondrial ultrastructure, and lowered ROS and MDA accumulation, alongside partial recovery of antioxidant enzyme activities (SOD, CAT, POD, HK, ATPase). Transcriptomic profiling revealed that D6 counteracted Cd-driven repression of metabolic and mitochondrial pathways, including peroxisomal β-oxidation , ubiquinone biosynthesis, and genes essential for lipid catabolism (e.g., acs-7 , acox-3 , nkat-1 ). Weighted gene co-expression network analysis identified a D6-responsive module enriched with regulatory genes associated with metabolic repair and stress resilience. Collectively, these findings identify D6 as a previously unrecognized organosilicon compound that reduces Cd accumulation and reprograms metabolic and mitochondrial functions, thereby improving organismal homeostasis and enhancing resilience to Cd stress.
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PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Junying Yu,Yin Ren,Luming Zhou,Peng Ye,Lin He,Yahong Wang,Yingrui Chen,Chunlin Fu
The trade-off between power conversion efficiency (PCE) and average visible transmittance (AVT) in semi-transparent solar cells significantly restricts their application in building-integrated photovoltaics. Bismuth ferrite (BiFeO 3 , BFO)-based materials have shown great potential to address this trade-off due to their inherent ferroelectric properties and tunable optical bandgap. However, even with performance optimization through chemical doping, a considerable bottleneck remains. Using the Ca/Cr co-doped BFO system as an example—whose optimal composition still exhibits a PCE below 1.4 %—this study proposes a new strategy of physical thickness control to overcome the limitations of chemical doping. By systematically investigating the influence of the thickness (200–350 nm) of the Ca/Cr co-doped BFO layer with optimal composition on device performance, it was found that increased thickness significantly enhances light absorption and optimizes the distribution of the built-in electric field. The results demonstrate that at a thickness of 336 nm, the device achieves the best photovoltaic performance (PCE = 1.86 %, open-circuit voltage ( V oc ) = 1.57 V, short-circuit current density ( J sc ) = 2.30 mA/cm 2 ), representing an improvement of over 35 % compared to the reference thickness (210 nm). Meanwhile, at a thickness of 285 nm, the device maintains a relatively high AVT (33.70 %) and achieves the highest light utilization efficiency (LUE = 0.6100 %). Electrical impedance spectroscopy analysis indicates that increased thickness effectively reduces the carrier recombination probability. This study reveals the synergistic mechanism of thickness regulation through “light absorption–built-in electric field–carrier transport” in balancing PCE and AVT, providing a reliable optimization strategy for semi-transparent ferroelectric photovoltaic devices.
研究领域:
光伏技术
·
材料科学
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薄膜器件
·
光电子学
·
可再生能源
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Iwei Wang,Hailiang Nie,Yongliang Yan,Manyi Cai,Hui Zhou,Yongqing Xu,Yi Xing,Hongzhi Ma
Reconstructing dual functional materials (DFMs) from industrial waste such as steel slag offers a sustainable approach to mitigate environmental pollution while valorizing hazardous byproducts. Although the steel slag is rich in calcium and iron, its direct use is hindered by the formation of inactive solid solutions (e.g., Ca 2 Fe 2 O 5 , Ca 2 SiO 4 ), limiting CO 2 capture and conversion performance. In this study, we reconstruct steel slag into a high-performance DFM composed of CaO (adsorptive phase) and FeOx (catalytic phase) for integrated CO 2 capture and utilization (ICCU). The optimized DFM achieves a CO 2 uptake of 9.15 mmol g −1 , a CO yield of 7.80 mmol g −1 , 87 % CO 2 conversion, and 100 % CO selectivity at 650 °C, substantially outperforming the raw slag. Moreover, the DFM maintains outstanding cyclic stability over 10 cycles, with CO 2 uptake ranging from 8.25 to 10.38 mmol g −1 and CO yield from 6.90 to 8.25 mmol g −1 . In-situ XRD and DRIFTS analyses reveal a dual Fe-phase looping mechanism (Fe/FeO and Fe/Ca 2 Fe 2 O 5 ), and a formate-mediated hydrogenation pathway during in-situ CO 2 conversion. This work highlights the untapped potential of industrial waste for developing efficient, sustainable materials for integrated CO 2 capture and utilization.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Xiaoyu Zhao,Jianhua Ding,Wenlong Bai,Yanfei Wang,Yujia Yan,Yan Cheng,Juankun Zhang
A PEDOT:PSS/AuNPs/CA modified screen-printed carbon based disposable electrochemical sensor for sensitive and selective determination of carmine was studied. Enhanced electrode conductivity was achieved via a 3-step process: (i) construction of a conductive polymer (PEDOT: PSS) on a disposable screen-printed carbon electrode (SPCE) (ii) electropolymerization with gold nanoparticles (AuNPs) and (iii) modification with positively charged β-mercaptoethylamine (CA) in acidic solution using an Au S bond. The prepared nanomaterials were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectrum analysis (EDX). The properties of the resulting sensor were examined by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Experimental parameters associated with optimal detection conditions such as modes of electrode modification, ratio of PEDOT:PSS, pH of electrolyte, number of turns used for AuNPs polymerization, and CA concentrations were evaluated. The data revealed that the prepared sensor had a low detection limit (6.05 × 10 −9 mol/L) and could achieve linearity over a wide range of concentration (9.0 × 10 −9 to 3.9 × 10 −6 mol/L), thereby meeting the requirements for analysis of trace carmine. The reliability of our technique for practical applications was demonstrated by analyzing carmine in spiked beverages.
研究领域:
电分析化学
·
纳米材料科学
·
食品安全监测
·
传感器与生物传感器
·
环境分析化学
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高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2012
·Vol. 8
·期 4
·567-577
·
IF 0.758
Ying Gu,Xiaowei Liu,Bo Zhao,Wenqiang Liu,Minghou Xu
Nitrogen species distribution during coal pyrolysis with Ca addition in N 2 , CO 2 and Ar was studied at 1000 °C using a horizontal tube furnace. In particular, the effect of Ca on the distribution of nitrogen species in N 2 and CO 2 atmospheres, which were closer to pyrolysis processes of conversional air and oxy-fuel combustion in comparison with inert Ar environment, was investigated for the first time in this work. It was found that Ca has a great effect on nitrogen species distribution during both coal and demineralized coal pyrolysis; on the other hand, CO 2 causes the formation of NO. Demineralization increases the formation of HCN and char nitrogen, but there is little effect on NH 3 formation during pyrolysis in N 2 , in contrast to pyrolysis in Ar atmosphere, which decreases NH 3 formation. A significant reduction in char yield was found after char gasification in CO 2 at 1000 °C. With two different Ca-based additives, i.e., (CH 3 COO) 2 Ca and Ca(OH) 2 , char yield decreases with the increasing amount of Ca additives in both cases. The effect of Ca on HCN and NH 3 formation during pyrolysis depends on both the form of Ca and the amount of addition. In most cases, HCN and NH 3 formation decreases with Ca addition in Ar, but increases in N 2 . Ca addition slightly promotes HCN formation during pyrolysis in CO 2 . There is no NH 3 detected during pyrolysis in CO 2 because of the reaction of NH 3 and CO 2 in the background. In addition, NO concentration decreases sharply with increasing the amount of Ca addition in the atmosphere of CO 2 , which means that Ca has an effect not only on pyrolysis, but also on gasification of char in CO 2 . In most cases, char nitrogen increases with Ca addition in N 2 or Ar. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.
研究领域:
能源科学
·
环境科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 15
·6743-6756
·
IF 4.5
Zhou Huan,Wang Jie,Yang Bing,Sun Manna,Liang Chunyong,Yang Lei,Zhao Xiaoyan,Wang Hongshui
In this work, near-infrared light responsive upconversion nanoparticles TiO 2 /(Ca,Y)F 2 :Tm,Yb were hydrothermally prepared for tumor control. Moreover, femtosecond laser was adopted to reduce particle size and aggregation of TiO 2 /(Ca,Y)F 2 :Tm,Yb, as a strategy to enhance its dispersity. In vitro studies of the biocompatibility and tumor control efficacy of TiO 2 /(Ca,Y)F 2 :Tm,Yb were carried out via co-culturing human pancreatic carcinoma cells (CFPAC-1). It was found in the absence of near-infrared light, TiO 2 /(Ca,Y)F 2 :Tm,Yb showed no toxicity to CFPAC-1 cells. On contrast, when exposed to near-infrared light, particles exhibited irradiation time, irradiation interval and particle concentration dependent suppression of CFPAC-1 cells proliferation along with portion of S phase cells increase. A nude mouse model with CFPAC-1 cells injection was established and TiO 2 /(Ca,Y)F 2 :Tm,Yb was subsequently applied for in vivo tumor control. A 15 days tracking confirmed the antitumor capability of near-infrared light excited TiO 2 /(Ca,Y)F 2 :Tm,Yb. Overall, we anticipate that the here-introduced TiO 2 /(Ca,Y)F 2 :Tm,Yb can serve as an effective agent for photodynamic antitumor therapy. Graphical Abstract
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高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Yanfei Jia,Jianwen Wei,Yuan Yuan,Xiaobin zhou,Linlin Geng,Lei Liao
Using KIT-6 as the silica source, a series of Li 4 SiO 4 adsorbents (KIT-6-Li 4 SiO 4 ) were synthesized by impregnation precipitation method for high temperature CO 2 capture. Then, the KIT-6-Li 4 SiO 4 -800–4 (KL-800–4) material, was selected to analyze the improvement of the adsorption performance by Ca 2+ /Na + eutectic doping modification. These adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and low temperature N 2 adsorption/desorption, and the CO 2 adsorption capacity of them was explored. At 600 °C and under 15 vol% CO 2 , KL-Ca0.03 and KL-Na0.06 sorbents resulted in a CO 2 uptake of 29.17 wt% and 35.35 wt% (close to the theoretical maximum), respectively，which are much higher than that of KL-800–4 (14.73 wt%). After 10 adsorption/desorption cycles, the adsorption capacity of KL-Na0.06 increased by 1.35 wt%. We found that KL-Na0.06 has more advantages compared with traditional lithium orthosilicate and undoped adsorbents, including lower energy consumption, higher CO 2 adsorption capacity and better cycling ability. Finally, the double exponential model had a high degree of fit for the adsorption of CO 2 by Li 4 SiO 4 .
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高影响因子
危险品化学品经营许可证（带存储）