APPLIED THERMAL ENGINEERING
·
2016
·
IF 3.043
Aihong Du,Huiwen Yuan,Wei Liao,Haobo Zhou,Chunhua Lu,Zhongzi Xu
Cost-effective thermal energy storage materials are vital to the application of solar thermal power plants . One focus of this paper is improving thermal and mechanical properties of the thermal energy storage materials; the second focus lies in reducing the investment cost. On the basis of aluminate cementitious composites with 1 wt% nano-SiO 2 , 1 wt% nano-Cu and 15 wt% Cu powders, we introduced different wt% (0, 5, 10, and 15) of Fe powders to gradually replace 15 wt% Cu powders. The samples were heated at 105, 350, and 900 °C, respectively. As a result, when the content of Fe powders substitution was 10 wt%, volume heat capacity, thermal conductivity and compressive strength of the composites after heat-treatment at 900 °C were up to 2.38 MJ m −3 K −1 , 1.45 W m −1 K −1 , and 73.8 MPa respectively, which were 26.6%, 26.1%, and 24.0% higher than those of the composites with 15 wt% Cu powders. At the same time, the investment of the composites with 10 wt% Fe powders substitution was reduced almost 62.0%, compared with that of the composites with 15 wt% Cu powders. In addition, XRD and MIP were employed to characteristic the mineral phases and the pore structures of the aluminate cementitious composites, respectively.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ya Xu,Jihong Zhou,Peng Sun,Ping Li,Dongxue Han,Xiaohong Wang,Fang Chai
Artificial mimic enzymes have attracted wide attention for their superior characteristics to natural enzymes in extensive applications of diagnosis and therapy. In this paper, a nanozyme Cu-BDC@FeMo 6 was designed and fabricated by embedding polyoxometalate (NH 4 ) 3 [FeMo 6 O 18 (OH) 6 ]·6H 2 O (FeMo 6 ) into a copper-based metal–organic framework (Cu-BDC). The integration of FeMo 6 and Cu MOF based on the synergies of oxidability of FeMo 6 and oxygen-driven reversible Cu + /Cu 2+ enhanced the peroxidase mimicking activity, which accomplished the sensitive visual monitoring of H 2 O 2 and dopamine (DA). The detection of H 2 O 2 was driven by Cu-BDC@FeMo 6 catalyzing the oxidation of TMB with colorimetric evolution to blue, and consecutive monitoring DA via the reverse process of reduction of ox-TMB was further achieved. The limit of detection (LOD) of H 2 O 2 and DA were 10 μM and 2.27 μM, with excellent stability, and outstanding selectivity. The mechanism of the catalysis was further evaluated, and the generation of O 2 · - played a crucial role in the catalysis for oxidation. The logic gate design was constructed to illustrate the process and application. This work provides a feasible reference for the reasonable design of simulated enzyme in biosensor applications.
研究领域:
生物传感
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材料科学
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仿生催化
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiaohong Tan,Hao Lin,Jiahao Zhou,Zhanhua Su,Bingbing Wan,Xiangming Li,Zhongqun Zhou,Yuge Liu,Guiyin Li
Hepatocellular carcinoma (HCC) is a leading cause of cancer-related mortality worldwide. Early detection of HCC is pivotal for early treatment, thereby improving survival rates. Golgi protein 73 (GP73) is a promising biomarker for early HCC diagnosis, making it crucial to develop a sensitive method to detect GP73. In this study, a novel ratiometric electrochemical aptasensor was fabricated for the sensitive detection of GP73 using Hemin-Cu-based metal-organic framework (Hemin-Cu-MOF) nanocomposites and GP73 aptamers. The Hemin-Cu-MOF nanocomposites possessed not only excellent electroactive property with the Hemin and Cu-MOF as dual signal outputs, but also good electroconductivity to amplify the electrochemical signals. The Hemin-Cu-MOF nanocomposites with numerous active sites was used to label the GP73 aptamer (AptI) and construct the Hemin-Cu-MOF-AptI signal probe. Another sulfhydryl-modified GP73 aptamer (AptⅡ) was immobilized on the gold nanoparticles (Au) modified screen-printed carbon electrode (Au/SPCE) through gold-sulfur (Au-S) bonds and used as a capture probe. Upon adding GP73, AptI and AptⅡ specifically recognized GP73 to form the sandwich complex AptⅡ@GP73@Hemin-Cu-MOF-AptI, making the dual signal of Hemin-Cu-MOF change and indicating GP73 level. Under optimal experimental conditions, the ratio of two oxidation peak currents (I Cu-MOF /I Hemin ) was proportional to the GP73 concentration (1.0–300.0 ng/mL), with a detection limit as low as 0.625 ng/mL. Furthermore, the aptasensor was tested in real human serum samples using the standard recovery method, with recoveries ranging from 104.10 % to 116.66 %. Thus, the proposed aptasensor has great potential in clinical analysis for detecting GP73 and early diagnosing of HCC.
研究领域:
生物医学工程
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肿瘤学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ao Han,Gang Wang,Wei Wang,Yu Zhao,Rujie He,Caiwang Tan
Negative coefficient of thermal expansion (Sr 0.2 Ba 0.8 )TiO 3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cu f ) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cu f foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cu f /AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.
研究领域:
材料科学
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工程学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 7
·1799-1812
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IF 5.934
Xiaosong Hu,Chaoyue Zhao,Qingxin Guan,Xin Hu,Wei Li,Jun Chen
The chemical transformation of CO2 not only mitigates CO2 released into the atmosphere but also produces fuels and chemicals with important additional value. The activation of stable CO2 molecules is the key difficulty for the efficient conversion of CO2. Herein, we designed a ternary catalyst containing Cu, ZnO, and CeOx and dispersed them in SBA-15 using incipient wetness impregnation. Interestingly, the catalytic performances were improved greatly when the related active components were dispersed inside and outside the pore channels of SBA-15 using the incipient wetness impregnation method. Methanol and CO were controllably produced on the interface of Cu and metal oxides (ZnO and CeOx) due to the synergistic effects between the three active components. The metal oxides play a more important role in CO2 conversion as well as the product selectivity compared to Cu. CeO2 is more efficient than ZnO in promoting the dispersion of Cu nanoparticles and methanol generation. The suitable pore channels of SBA-15 promote the mass transfer and heat transfer while the high specific surface area is favorable to the dispersion of active components, which will facilitate the production of methanol and CO. After continuous hydrogenation evaluation for 100 h, the catalytic performance of the catalyst was still very stable. This work provides a viable strategy to prepare a supported catalyst with highly dispersed active sites, and the catalyst exhibits an efficient catalytic effect on producing methanol and CO.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xiaoqiang Wang,Yue Liu,Zhongbiao Wu
In this paper, the Cu-Ce based catalyst using NbOPO 4 (Nb-P) as support was firstly employed for selective catalytic reduction (SCR) of NO by NH 3 . The experimental results had illustrated that such catalyst exhibited well SCR activity and N 2 selectivity within a wide temperature range of 200–450 °C. These superior performances could be mainly attributed to its improved textural properties and strong acidity derived from NbOPO 4 support. More importantly, the sulfur tolerance of the NbOPO 4 supported Cu-Ce sample was found greatly improved compared to TiO 2 and Ti-Nb supported samples, where above 80% SCR activity of Cu-Ce/Nb-P sample was obtained at 250 °C after 10 h reaction running in the presence of 100 ppm SO 2 . This fact was the result of the enhanced acidity and the strong interactions between Cu-Ce oxides and NbOPO 4 support, which could prevent the surface oxygen species from sulfation by SO 2 . As such, these oxygen species strongly associated with NbOPO 4 support still could activate adsorbed NH 3 to fulfill the SCR reaction cycle, leading to its better sulfur resistance. The work would provide some enlightenments to the development of NH 3 -SCR catalysts with high sulfur resistance at medium-high temperature.
研究领域:
催化化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 37
·11438-11442
·
IF 0
Songjie Fan,Fuxing Sun,Jijiang Xie,Jin Guo,Laiming Zhang,Chunrui Wang,Qikun Pan,Guangshan Zhu
Cu(bipy)2(SiF6) is a highly porous metal–organic framework (MOF) and represents a prototypal “pillared sheet” platform offering opportunities to control the pore sizes. Its structural features, low cost and facile synthesis make it a great candidate to fabricate membranes for gas separation. The key to obtaining thin, continuous Cu(bipy)2(SiF6) membranes is to control the Cu(bipy)2(SiF6) crystal growth and enhance the binding between membrane and substrate. Here we explored a new route by direct synthesis and successfully obtained a continuous thin Cu(bipy)2(SiF6) membrane on a macroporous glass-frit disk with high robustness. It is speculated that the SiF62− used to construct the Cu(bipy)2(SiF6) membrane came from the fluorinated substrate. The Cu(bipy)2(SiF6) membrane shows the separation factors of H2–CO2, H2–CH4 and H2–N2 are 8.0, 7.5, and 6.8 respectively at 293 K and 1 bar with H2 permeance of 2.7 × 10−7 mol m−2 s−1 Pa−1 as well as high thermal stability. We expect to explore more membranes of Cu(bipy)2(SiF6) analogues with tuneable pore sizes using this route and to obtain membranes with higher gas separation performance.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
RSC Advances
·
2012
·Vol. 2
·期 7
·2666-2670
·
IF 0
Meina Wang,Xiangyou Liu,Chuanbao Cao,Cui Shi
Cu–In–S ternary nanocrystals (NCs), with an average size of less than 10 nm, were synthesized in an aqueous solution containing bovine serum albumin (BSA). X-Ray powder diffraction (XRD) and selected-area electron diffraction (SAED) analyses showed that these NCs featured a roquesite structure. The composition of the NCs could be adjusted by controlling the molar ratio of the starting Cu/In precursors in the reaction solution, which led to a tunable band gap ranging from 1.48 eV to 2.30 eV. Cytotoxicity testing showed that the BSA-stabilized Cu–In–S NCs had little effect on the cell viability, which suggested that they are user-friendly and environmentally benign. With low cost, minimal energy input and environmental impact, this simple approach shows great potential for industrial applications.
研究领域:
材料科学
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纳米技术
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生物学
·
环境科学
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Shuai Liu,Dicka Ar Rahim,Yan Zhang,Dan Wang,Ekkachai Kanchanatip,Yi He,Mi Yan
To advance the utilization of high-concentration CO2 produced in biogas upgrading, it is essential to remove associated hydrogen sulfide (H2S). This study presents a series of bimetallic Fe–Cu oxides supported on multi-walled carbon nanotubes (MWCNTs), which were synthesized to efficiently remove H2S from CO2-rich gas at low temperatures. The synergy of the bimetallic elements not only forms a multifaceted active phase but also causes new defects on the MWCNTs, creating more H2S/CO2 separation sites. The adsorption experiments demonstrate that the deep H2S removal performance of the adsorbent is unaffected by the CO2 concentration, achieving a maximum adsorption capacity of 30.11 mg g−1, which exceeds that of commercial desulfurizers and previously reported adsorbents. Additionally, density functional theory calculations were employed to elucidate that the introduction of Cu species increases the gap in the average adsorption energies between H2S and CO2. The adsorbent also exhibited stability after 4-cycle regeneration at room temperature, maintaining 62.6% of its initial H2S capacity. This work underscores the potential of Fe–Cu oxide/MWCNTs adsorbents as a viable, regenerable solution for H2S removal in CO2 purification, offering implications for carbon-negative construction.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Wei Xiang,Yueting Liao,Jinwei Cui,Yangyang Fang,Bining Jiao,Xuesu Su
Antibiotic adsorbents are getting significant attention due to the hazards posed by the accumulation of tetracycline antibiotics in water, which can adversely impact human and environmental health. Bimetallic organic frameworks (BMOFs) exhibit considerable potential in adsorption owing to their dense pore structures and synergistic effects. However, synthesizing efficient, low-cost, and easy-to-prepare BMOFs faces several challenges. Here, we describe the practical synthesis of a series of Fe/Cu-bimetallic organic frameworks (Fe/Cu-MOFs) using simple room-temperature aqueous solvent methods. The pore size structure of Fe/Cu-MOFs is determined by the Fe/Cu ratio employed in the synthesis process. Remarkably, when the Fe/Cu molar ratio was 1:2, the void ratio of Fe/Cu-MOFs increased to 0.7326 cm 3 /g, with a predominant mesoporous structure, and the maximum tetracycline (TC) adsorption capacity exhibited by Fe/Cu-BTC-1/2 was reported at a Q max of 1130.23 mg/g. The adsorption kinetics followed the quasi-second-order kinetic model, and the adsorption isotherms were consistent. The Fe/Cu-BTC-1/2 was effective throughout a wide pH range (6.0–10.0), exhibiting resilience against ionic interference and enabling recycling. The predominant mechanisms of TC adsorption by Fe/Cu-BTC-1/2 include coordination, vacancy filling, and π-π stacking. Thus, our research provides an excellent adsorbent for TC antibiotics and novel insights into the simple synthesis of BMOFs and their application in environmental remediation.
研究领域:
环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Bio
·
2025
·
IF 10.2
Yajuan Hu,Wei Xu,Linghan Sun,Xuemin Ma,Peirong Zhou,Chuankai Zhang,Rui Cai,Xia Wang,Hua Yang,Gang Tao,Junliang Chen,Yun He
Periodontitis is a chronic inflammatory disease characterized by oxidative stress, immune system imbalance, and the progressive destruction of periodontal tissues. Traditional treatment approaches are limited by the incomplete eradication of pathogens, the risk of antibiotic resistance, inadequate control of inflammation and oxidative stress, and restricted tissue regeneration capacity. Therefore, this study proposes an injectable multifunctional Laponite/gelatin hydrogel loaded with epigallocatechin gallate (EGCG)-copper ion (Cu 2+ ) complexes as a localized therapy for periodontitis. EGCG exhibits antioxidant, anti-inflammatory, and antimicrobial properties; however, its clinical application is hindered by poor stability and bioavailability. Cu 2+ coordination enhances EGCG stability and antioxidant capacity while improving its antimicrobial efficacy. Experimental results demonstrate that the Laponite/gelatin hydrogel is adaptable for the localized delivery of EGCG-Cu, with bioactive metal ions such as Li + , Mg 2+ , and Si 4+ contained in Laponite, which promote osteogenesis and periodontal tissue regeneration. In vitro and in vivo studies confirm that this hydrogel exhibits excellent biocompatibility, effectively inhibits Porphyromonas gingivalis , suppresses M1 polarization while promoting M2 polarization, and facilitates periodontal tissue repair. Therefore, this study provides promising insights into a localized therapeutic strategy for periodontitis.
研究领域:
生物材料学
·
口腔医学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2023
·Vol. 87
·期 5
·1202-1213
·
IF 2.7
Liu Zhenzhong,Wu Yang,Wan Siwen,Wang Boyan,Ji Hongliang,Xiang Xiaofang
View large Download slide View large Download slide Close modal Compared with the common synthesis methods of metal-organic frameworks (MOFs), Co/Cu-based bi-MOFs composite catalyst Co X Cu (10− X ) -MOFs ( X = 2, 4, 6, and 8) was prepared by a facile synthesis method at room temperature. The bi-MOFs composite catalyst was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The removal ability of sulfamethoxazole (SMX) by different Co:Cu rate bi-MOFs composite catalysts, single Co-based MOFs (zeolitic imidazolate framework-67, ZIF-67), and Cu-based MOFs (Hong Kong University of Science and Technology-1, HKUST-1) were investigated and the effects of peracetic acid (PAA) concentration, catalyst dosage, the common interfering substances (Cl − , HCO 3 − , SO 4 2− , HA) in water, and SMX removal were investigated. Through the analysis of different free radical scavengers and the changes of surface elements before and after the reaction, the oxidation mechanism was further explored, and the stability of Co 4 Cu 6 -MOFs was explored through repeated recycling. The experimental results demonstrate that Co 4 Cu 6 -MOFs have a high catalytic activity for PAA. Co 4 Cu 6 -MOFs/PAA show the best removal effect of SMX under neutral conditions and the presence of Cl − and HCO 3 - can promote the removal of SMX. Co 4 Cu 6 -MOF composites were synthesized and used for SMX removal. Application of PAA activation catalyst to generate R–O• for SMX removal. The effects of different environmental factors on the removal of SMX were discussed.
研究领域:
环境科学
·
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）