CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Xiang Zhang,Weihang Li,Jin Zhang,Haoshen Zhou,Miao Zhong
Electrochemical nitrate (NO 3 − ) reduction offers a promising route for ammonia (NH 3 ) synthesis from industrial wastewater using renewable energy. However, achieving selective and active NO 3 − to NH 3 conversion at low potentials remains challenging due to complex multi-electron transfer processes and competing reactions. Herein, we tackle this challenge by developing a cascade catalysis approach using synergistic active sites at Cu-Fe 2 O 3 interfaces, significantly reducing the NO 3 − to NH 3 at a low onset potential to about +0.4 V RHE . Specifically, Cu optimizes *NO 3 adsorption, facilitating NO 3 − to nitrite (NO 2 − ) conversion, while adjacent Fe species in Fe 2 O 3 promote the subsequent NO 2 − reduction to NH 3 with favorable *NO 2 adsorption. Electrochemical operating experiments, in situ Raman spectroscopy, and in situ infrared spectroscopy consolidate this improved onset potential and reduction kinetics via cascade catalysis. An NH 3 partial current density of ~423 mA cm −2 and an NH 3 Faradaic efficiency (FE NH3 ) of 99.4% were achieved at −0.6 V RHE , with a maximum NH 3 production rate of 2.71 mmol h −1 cm −2 at −0.8 V RHE . Remarkably, the half-cell energy efficiency exceeded 35% at −0.27 V RHE (80% i R corrected), maintaining an FE NH3 above 90% across a wide range of NO 3 − concentrations (0.05−1 mol L −1 ). Using 15 N isotopic tracing, we confirmed NO 3 − as the sole nitrogen source and attained a 98% NO 3 − removal efficiency. The catalyst exhibit stability over 106-h of continuous operation without noticeable degradation. This work highlights distinctive active sites in Cu-Fe 2 O 3 for promoting the cascade NO 3 − to NO 2 − and NO 2 − to NH 3 electrolysis at industrial relevant current densities.
研究领域:
环境科学
·
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 24
·2000
·
IF 4.4
Zhipeng Yu,Pengxu Yan,Yilei Sheng,Chengwei Zhang,Zhun Qiao,Qikui Fan,Chuncai Kong,Zhimao Yang
Copper-based materials, renowned for their redox versatility and conductivity, have extensive applications in electrochemical sensing. Herein, we construct stable Cu+/Cu2+interfaces within dual-valence copper nanostructures to achieve enhanced sensitivity in glucose sensing. By employing a hydrolysis method to tune Cu2+/Cu+ratios precisely, we achieved an optimal electrochemical interface with heightened stability and reactivity. The Cu+/Cu2+interface-based flexible electrode demonstrated excellent glucose sensitivity (332.4 µA mmol/L−1cm−2at +0.65 V), wide linear range (up to 10 mmol), a low detection limit of 1.02 nmol/L, and strong selectivity, including detection in human sweat, making this study significant for advanced electrochemical sensors.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Ganghua Zhou,Yun Chen,Gaoran Chen,Hangmin Xu,Weiqin Yin,Bin Wang,Xingwang Zhu,Xin Ning,Paul K. Chu,Xiaozhi Wang,Hui Xu
Metal-organic frameworks (MOFs) with abundant pores are excellent adsorbents for metal ions. However, the subsequent treatment of used MOFs and their reutilization still lack promising solutions. Herein, the surface-restructured Mn-doped Cu 2 O (RM-Cu 2 O) catalyst containing asymmetric Mn−Cu sites is prepared by glucose reduction using the spent Cu-based MOF (HKUST-1) as the precursor. The RM-Cu 2 O catalyst shows good potential in tunable photocatalytic syngas (CO and H 2 ) production in a pure water system. The syngas ratios can be tuned from ∼1:2 to ∼1:1 by increasing CO production. DFT calculations and photoelectrochemical tests confirm that the asymmetric Mn−Cu sites on the RM-Cu 2 O catalyst accelerate the photogenerated charge transport and optimize CO 2 adsorption and activation. In situ irradiation X-ray photoelectron spectroscopy is conducted to investigate the dynamic charge transport and reactions on the RM-Cu 2 O catalyst. Based on in situ Fourier transform infrared spectroscopy and simulations, the mechanism of photocatalytic syngas production is elucidated. This work provides a promising solution for the resource utilization of the spent MOFs-based adsorbents and photocatalytic energy development.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2024
·
IF 3.8
Xiaocui Zhang,Xiaoxin Wang,Jun Gao,Jiangcheng Li,Xiangfeng Liang,Qinghui Shou
The global need for bromide ions (Br - ) has driven the research focus to extract them from various liquid ores. Highly efficient and selective adsorbent is still lacking. MOF with large surface area and structural stability are promising candidate for Br - extraction. In this work, we prepared Cu-MOF-74 nanocrystals. Abundant hydroxyl groups on them spontaneously reduced Ag + to Ag 0 nanoparticles, resulting in the fabrication of Ag 0 doped Cu-MOF-74. The crystalline structure retains after the doping of Ag 0 when the mass ratio of silver nitrate to MOF is <0.5. The crystals are distorted or even damaged when the ratio is higher than 1.0 according to XRD and DFT calculation. The adsorption capacity of Ag 3 -Cu-MOF-74 is 232.92 mg g -1 , surpassing the capacities of most previously documented adsorbents. The desorption of Br - and thereafter the recovery of adsorbent could be realized through light driven decomposition of AgBr. This MOF adsorbent shows promising application potential in Br - recovery from various liquid ores.
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
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
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
·
工程学
✓ 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
·
肿瘤学
·
分析化学
✓ 已验证
产品关联
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
·
仿生催化
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 7
·1799-1812
·
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
·
催化科学
✓ 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
·
纳米技术
·
生物学
·
环境科学
✓ 已验证
DOI
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Bifang Zheng,Yi He,Shuangqin Tian,Shujie Wang,Lihong Tang
The combination of bamboo fiber (BF) with chitosan (CS) in aerogels to capture heavy metals from contaminated water has not yet been previously reported. In this study, we used a straightforward sol–gel followed by freeze-drying method to fabricate a biomass composite aerogel using waste BF and CS (BF/CSA). This material is low-cost, eco-friendly, and recyclable. In particular, the BF/CSA-2 exhibited excellent mechanical strength and strong acid resistance. It effectively adsorbed Cr(VI) at pH=2 and Cu(II) at pH=5, achieving removal efficiencies of 94% and 85%, respectively. The corresponding maximum adsorption capacities were 162.10 and 138.97 mg/g. BF/CSA-2 exhibited a high removal efficiency (>70 %) after five consecutive reuse cycles. The chemisorption mechanism was confirmed through adsorption isotherms and kinetic analysis. In addition, density functional theory (DFT) calculations revealed adsorption energies of −196.473 and −121.964 kcal/mol for Cr(VI) and Cu(II), respectively, on BF/CSA-2. Based on experimental characterization and theoretical calculations, the removal mechanism involves complexation, electrostatic attraction, and reduction. This study presents a promising advancement toward the development of scalable and sustainable biomass-based aerogels for water purification.
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
危险品化学品经营许可证（带存储）