ACS Sensors
·
2024
·
IF 8.2
Huan Wang,Chonghui Zhu,Xiaohui Yan,Zhaorui Zhang,Huashuai Hu,Mengmeng Xu,Yu Liang,Minghui Yang
Fuel cell gas sensors have emerged as promising advanced sensing devices owing to their advantageous features of low power consumption and cost-effectiveness. However, commercially available Pt/C electrodes pose significant challenges in terms of stability and accurate detection of low concentrations of target gases. Here, we introduce an efficient Cu–Pt/CrN-based fuel cell gas sensor, designed specifically for the ultrasensitive detection of hydrogen sulfide (H2S) at room temperature. Compared to the commercial Pt/C sensor, the Cu–Pt/CrN sensor exhibits excellent sensitivity (0.26 μA/ppm), with an increase in the selectivity by a factor of 2.5, and demonstrates good stability over a 2 month period. The enhanced sensing performance can be attributed to the modulation of the electronic arrangement of Pt by Cu, resulting in an augmentation of H2S adsorption. The Cu–Pt/CrN fuel cell gas sensor provides an opportunity for detecting parts per billion-level H2S in various applications.
研究领域:
材料科学
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传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Xiupei Yang,Xiaoyi Xie,Ling Jiang,Yuxiu Fan,Chenglin Zhang,Ya Wang
Most conventional nanozymes have poor specificity and low activity, and designing high-performance nanozymes remains a challenge. In contrast, single-atom nanozymes have high atom utilization and high reactivity. Here, we prepared Cu single-atom nanozymes (Cu-NC) with excellent peroxidase-like activity by high-temperature pyrolysis using Cu as a transition metal source. The introduction of Cu formed the Cu-N x active site, which accelerated charge transfer between the reactants and the active site and was the key for improving the activity. With Cu-NC as a catalyst, H 2 O 2 rapidly oxidized 3,3′,5,5′-tetramethylbenzidine (TMB) to oxTMB, and the solution turned blue with strong absorption at 652 nm. Because d -penicillamine (D-PA) can reduce oxTMB or react with reactive oxygen species radicals to inhibit the color reaction, we built a colorimetric sensing platform around Cu-NC for the determination of D-PA and successfully used it for the determination of D-PA in urine samples. This work provides new ideas for the design of high-performance nanozymes and the detection of D-PA in real environments.
研究领域:
生物化学
·
医学诊断
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Xuesong Shan,Keru Song,Siyu Huang,Jianwen Wang,Fengyue Shi,Dongyu Zhao
The annealing approach is usually used to synthesize carbon-based materials. We use polystyrene (PS) microspheres as a template to composite with carbon nanotubes (CNTs) loaded by Cu-Ni ions. After One-step high-temperature treatment, the PS microspheres disappear, and the composite materials become a three-dimensional porous structure. At the meantime, the Cu-Ni ions are reduced and attached to the material (CNTs/Cu-Ni/CP (CMP)). Then, the CMP material is coated with Polyaniline (PANI). The two-step high-temperature treatment accomplishes the Nitrogen-doped process of the material (CNTs/Cu-Ni/CP@CPANI (CMPN)). Electrochemical analysis indicates that materials have a high specific capacitance value (356F/g at 0.5 A/g). After 10,000 cycles of charging and discharging, the capacitance retention rate is 92.57 %. The assembled symmetrical supercapacitor possesses outstanding energy and power density (11.92 Wh kg −1 at 700.73 W kg −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Chemistry
·
2019
·
IF 1.727
Dekui Bai,Xiaofang Wang,Dongxia Huo,Quanhong Ying,Ni Wang,Baixue Xia
Cu/Zn/Al-hydrotalcite-like compound (Cu/Zn/Al-HTlc) was prepared by the coprecipitation method with ZnII, AlIII cations solution, and electroplating wastewater containing CuII cation. The preparation conditions of Cu/Zn/Al-HTlc were optimized. The metal ion pollutants removal effect and iodide maximum adsorption capacity of Cu/Zn/Al-HTlc were also studied. The physicochemical properties of the Cu/Zn/Al-HTlc were analyzed by X-ray diffraction, FTIR, SEM, N2 adsorption-desorption isotherms, and TG-DTG. The results showed that Cu/Zn/Al-HTlc should be prepared with the ZnII-AlIII molar ratio of 1.5 : 1, pH = 11, and aged at room temperature for 0.5 d. Structural analysis showed that the Cu/Zn/Al-HTlc was a layered compound. CuII and other metal ion pollutants can also be successfully removed from electroplating wastewater in the preparation process of Cu/Zn/Al-HTlc and reached Chinese National Emission Standard (GB 21900-2008). The optimal adsorption condition of calcinated Cu/Zn/Al-HTlc for iodide was as follows: the solid-liquid ratio was 1 : 250, the pH value was 8, and the adsorption process was carried out at 25°C for 30 min. The saturated adsorption capacity reached 1000 mg·g−1 at the optimal adsorption condition. The main reason for this high-saturated adsorption capacity of Cu/Zn/Al-HTlc was that iodide penetrated into the layered structure of Cu/Zn/Al-HTlc by physical adsorption and CuII undergoes a specific redox reaction, producing CuI. Hence, coprecipitation synthetic technology and prepared Cu/Zn/Al-HTlc could be potentially used for electroplating wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
International Journal of Materials Research
·
2022
·Vol. 113
·期 4
·295-305
·
IF 0.678
Yanbing Yin,Hang Yang,Zhaosong Xin,Guopeng Xu,Yang Liu,Guohua Dong,Jie Ma
In this work, a novel MOF (metal organic framework) based composite of β-BCoPc/Cu-BTC is fabricated by immobilizing β-aryloxy phthalocyanine cobalt (β-BCoPc) on Cu-BTC (benzenetricarboxylic acid-Cu) via a facile impregnation approach. After a systematic characterization via X-ray diffraction, X-ray photoelectron spectroscopy, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and N 2 adsorption–desorption isotherms, the above-synthesized catalyst is for the first time applied to photocatalytically decompose refractory malachite green (MG) dye pollutant under UV light irradiation. In comparison with that of the β-BCoPc or Cu-BTC monomers, the synthesized β-BCoPc/Cu-BTC composite shows a significantly enhanced photocatalytic degradation performance of MG with a best degradation efficiency up to 90.12 %, which can easily be attributed to the synergistic effect between the Cu-BTC and β-BCoPc effectively improving light utilization efficiency, accelerating charge transportation and reducing charge recombination due to the desirable properties such as the conjugacy of the MOFs skeleton, the positive catalytic activity of central ion and large specific surface area, etc. In conclusion, the present work provides an effective and novel strategy via preparing MOF-based composite catalyst to realize the photocatalytic degradation of MG.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115501
·
IF 3.399
Chenhuinan Wei,ChenXia Kang,Qiming Liu
Cu nanowire (Cu NW) and Ag nanosheet (Ag NS) bimetallic nanocomposites were fabricated on a flexible polyethylene terephthalate (PET) slice for non-enzymatic glucose sensing via a facile two-step approach, vacuum filtration, and galvanic displacement. Low-cost Cu NW-based conductive films were employed as the conductive substrates to substitute the traditional glassy carbon electrodes or indium tin oxide electrodes. The highly stable Ag NSs grow directly on the surface of Cu NWs without additional binders. The AgNO3 concentration and displacement time were adjusted to control the consumption of Cu NWs and the growth of Ag nanostructures. With the large load of Ag and the great connection of Cu NWs, a high sensitivity of 2033 μA mM−1cm−2, a fast amperometric response of 2 s, a wide linear range of 0.0015–4.02 mM, and a satisfactory result in human serum analysis were obtained by this novel Ag NS/Cu NW/PET sensor. Especially the sensitivity of the sensor was over four-fold higher than that of pure Cu NWs/PET, benefiting from the synergistic effect of bimetals. Furthermore, the Ag NS/Cu NW/PET sensor demonstrated a stable amperometric signal against mechanical bending. The material holds promise to use to fabricate flexible electrochemical devices.
研究领域:
材料科学
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生物医学工程
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电化学传感器
✓ 已验证
DOI
PubMed
高影响因子
Processes
·
2024
·Vol. 12
·期 7
·1384
·
IF 2.8
Wuning Yuan,Xiao Yang,Cheng Liu,Liangyao Xue,Wenzhe Niu,Qisheng Yan,Yajie Zhu,Junchao Han,Wen Guo,Bo Zhang
Sodium borohydride (NaBH4) is a nontoxic and ideal storage material for hydrogen due to its safety and high hydrogen storage capacity. In order to improve the practicality of the sodium borohydride hydrogen production system, we deposited non-precious metal catalytic materials on readily available polymer foams using a simple chemical plating method, developing a suitable 3D catalyst. Its high specific surface area enables it to produce hydrogen at a rate of up to 3.92 L min−1g−1. Its unique structure gives the catalyst excellent durability. In addition, an efficient NaBH4-based H2supply system was developed using this catalyst. Co-Cu-B can facilitate stable hydrogen production from NaBH4, yielding a consistent power output ranging from 0 to 100 W. This work provides a new pathway for developing high-efficiency monolithic self-supported catalysts for industrial applications.
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
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-17
·
IF 3.9
Ge Rui,Tang Jing,Li Weijun,Liang Ping
In this study, a Cu-Sn superhydrophobic coating was fabricated on the surface of X70 steel via the electrodeposition method, resulting in an optimal contact angle of 164.2 ± 1.2°. Compared to the X70 substrate, the Cu-Sn coating exhibits superior corrosion resistance. In a 3.5 wt% NaCl solution, the polarization resistance ( R p ) is 71,037 Ω·cm 2 , approximately 48 times higher than the substrate; the corrosion current ( I corr ) is 2.23 × 10 − 7 A/cm 2 , roughly two orders of magnitude lower than that of the substrate. This enhancement is attributed to the addition of Sn, which combines with Cu to form a Cu-Sn alloy with a micro-nano structure, effectively improving the hydrophobicity and corrosion resistance of the coating. However, excessive SnSO 4 can hinder the formation of the micro-nano structure, leading to aggregation on the coating surface. In addition, the coating exhibits excellent self-cleaning properties and mechanical stability. After undergoing rigorous mechanical stability tests, including tape peeling, sandpaper abrasion, water drop impact, and sand erosion, the contact angle remains above 155°. These results are significant for addressing the issue of long-term durability and stability of superhydrophobic coatings in industrial applications and provide new prospects for the deposition of metals or alloys.
研究领域:
材料科学
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电化学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Ping Qiu,Shouwu Xu,Kaili Zhang,Zhongyuan Jiang,Daming Gong,Changfeng Chen
Cu@Cu 2 O films were prepared by electrochemical deposition method. The obtained Cu@Cu 2 O films were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), confocal Raman spectroscopy (CRS), UV–visible absorption spectroscopy and Photoluminescence (PL) spectroscopy. Electrochemical measurements were performed under intermittent visible light illumination to assess the photoelectrochemical cathodic protection effect of the prepared Cu@Cu 2 O films. The results indicated that a lower deposition potential could facilitate the reduction of Cu 2 O grain size together with an increase number of Cu. But the deposition potential has no obvious influence on the band-gap of the composite films, which exhibited n-type semiconductor properties. The open circuit potential of 304 stainless steel by coupling with the Cu@Cu 2 O-0.3 V films presented the most negative shift of −179 mV under visible-light illumination. The related photocurrent density was 0.13 mA·cm −2 . The photoelectrochemical conversion mechanism and the photoelectrochemical cathodic protection effects of the Cu@Cu 2 O films were discussed in detail.
研究领域:
材料科学
·
电化学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yingying Xu,Mengyao Li,Yingjiu Zhang,Hongzhang Song,Haoshan Hao
A series of Bi 2 Sr 2 Co 2 O y (BSCO), Bi 2 (Sr 2/3 Ba 2/3 Ca 2/3 )Co 2 O y (BSBCCO), Bi 1.9 Cu 0.1 (Sr 2/3 Ba 2/3 Ca 2/3 )Co 2 O y (BCSBCCO) and Bi 1.8 Ag 0.2 (Sr 2/3 Ba 2/3 Ca 2/3 )Co 2 O y (BASBCCO) ceramic samples were prepared to optimize the thermoelectric properties of BSCO by high entropy doping combined with Cu/Ag doping. High entropy doping improves the carrier mobility significantly, due to a sintering effect in liquid phase and an additional conduction path. Cu/Ag acceptor doping increases the carrier concentration and Seebeck coefficients. Both them enhance the electrical transport performance of doped samples effectively. Specially, the random distribution of several different cations caused by high entropy doping and Cu/Ag doping can enhance the phonon scattering, which greatly reduces the thermal conductivity of doped samples. Finally, the thermoelectric figure of merit ( ZT ) value of the BASBCCO sample is improved to 0.36 at 923 K on the basis of high entropy doped BSBCCO ( ZT = 0.28 at 923 K), which is twice that of the pristine sample.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Jingjing Wang,Xinjie Wei,Zhihui Wen,Junjie Liao,Liping Chang,Jiancheng Wang,Kechang Xie
Ultra-deep desulfurization for the generation of clean petrol, diesel, and benzene remains a significant and challenging goal globally. Cu-containing materials have emerged as a promising desulfurization strategy due to their high adsorption capabilities. However, existing reduction technologies often lead to over-reduction. In this study, we reveal an intriguing and unexpected property of Y zeolite following ammonium ion exchange. The in situ generation of ammonia from ammonia pools may alter the location of copper species and modify their acid characteristics. We encapsulated various amounts of Cu into CuY zeolite, labelled as H-Cu X -Y(APE), using a facile self-reduction strategy. Notably, H-Cu 5.71 -Y(APE) exhibits an exceptional breakthrough sulfur capacity for thiophene, achieving 4.17 mg/g, nearly double that of traditional Cu-HY(H 2 ). XPS analysis following APE reduction indicates a high proportion of Cu + species in H-Cu 5.71 -Y(APE). In situ calcination FT-IR provided detailed insights into the chemical transformation of Cu 2+ species during APE reduction. Furthermore, CO-FTIR analysis shows that the Cu + content in the supercages of H-Cu 5.71 -Y(APE) reaches a maximum of 62.3 %. Py-FT-IR reveals the strong Brønsted acid content in H-Cu X -Y(APE) significantly increases. The desulfurization mechanism of H-Cu X -Y(APE) was thoroughly investigated using in situ FT-IR, demonstrating that the protonation and copolymerization of thiophene occurred on HCuY(APE) and could be effectively suppressed by adjusting the amount of copper. This work presents a promising solution for efficient ultra-deep desulfurization using an in situ NH 3 reduction method from ammonia pools.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Guilu Qin,Yifan Liu,Ruhumuriza Jonathan,Baoshan Wu,Xian Jian
TiO 2 semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO 2 semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO 2 /C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO 2 , and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO 2 introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO 2 , the TiO 2 /C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.
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
危险品化学品经营许可证（带存储）