ADVANCED ENGINEERING MATERIALS
·
2019
·Vol. 21
·期 12
·1900825
·
IF 2.906
Yaofeng Mao,Lin Zhong,Xu Zhou,Dawei Zheng,Xingquan Zhang,Tao Duan,Fude Nie,Bing Gao,Dunju Wang
The booming development of 3D printing offers unprecedented hope for the construction of functional materials. However, it is still challenging to fabricate nano energetic materials due to the high sensitivity of energetic materials and the difficulty of high loading of materials. Recently, ink-based direct ink writing (DIW) 3D printing process for the preparation of reactive materials has attracted worldwide attention because of the simplicity in design of micro architecture and the possibility of low-cost manufacturing. Herein, a novel strategy for printing Al/CuO nanothermite is successfully achieved by DIW 3D printing of nanothermite inks with good rheology shear-thinning properties using F 2311 as a binder. The loading of nanothermite in this ink formula is up to 90 wt.%, and the burning rate can be as high as 352 mm s −1 . This approach provides new routes for achieving the applications in micro energetic device by printing high resolution and precise patterns of nanothermite with enhanced combustion performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Ya-Zhe Xing,Yin-Ni Men,Xiao Feng,Ji-Hua Geng,Zhi-Rui Zou,Fu-Hua Chen
The effect of CuO addition on the microstructure and ionic conductivity of 8 mol% yttria-stabilized zirconia (8YSZ) were investigated. Undoped and 1 mol%, 1.5 mol%, 2 mol%, 2.5 mol% and 3 mol% CuO-doped 8YSZ bulks were prepared by sol-gel synthesis, cold pressing forming, and high-temperature sintering. The microstructure, phase composition , and ionic conductivity of the samples were characterized in detail to determine whether it could be used as alternative electrolyte material for the intermediate and low temperature solid oxide fuel cells. The results reveal that all samples present cubic zirconia. With increasing the CuO-doping content, the lattice parameter of the samples decreases, while the relative density of the samples increases from 66 to 85%, and the mean grain size increases from 0.90 to 2.63 μm. Furthermore, it is found that 2 mol% CuO doped 8YSZ possesses the minimum activation energy of 0.945 eV and the maximum AC ionic conductivity of 5.75 × 10 −2 S·cm −1 measured at 750 °C. The change in the ionic conductivity with the CuO-doping content is closely related to microstructural evolution and defect association in the materials.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Rushun Xue,Lingmin Yu,Man Gong,Chuantao Zhang,Senlin Li,Shanglin Yang,Xuefeng Xiao,Ning Nan,Chun Li,Xinhui Fan
CuO is a typical p-type semiconductor with the advantage of narrow bandgap, making it a gas sensing material for detecting CO gas at lower operating temperatures.However, the poor response value limits its application. As a classical wide-band gap n-type gas sensing metal oxide semiconductor, TiO 2 has the advantages of high response to CO. However, high operating temperature becomes the big obstacle to overcome. Therefore, sensitive CO detection at lower temperature will be achieved by integration of CuO with TiO 2 . In this paper, in-situ two step hydrothermal method was used to prepare CuO/TiO 2 vertical bilayer nanorod arrays grown in situ. The gas sensing results show that the response value of the CuO/TiO 2 vertical bilayer nanorod arrays is 6.1 times (14.9, 300 ppm) higher than that of single CuO nanotentacle arrays (2.1, 300 ppm), and the operating temperature is reduced to 100 °C compared with pure TiO 2 nanorod arrays (360 °C). This strategy provides a new idea for the fabrication of CO gas sensors with high response and low operating temperature.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yongheng Xiong,Qin Zhong,Man Ou,Wei Cai,Shipeng Wan,Yang Yu,Shule Zhang
The discovery of effective methods toward nitric oxide (NO) removal by solution is valuable for the cost-effective flue gas control. In this study, it is first reported that nitrous oxide (N2O) is obviously suppressed by using copper oxide (CuO) combined with (NH4)2SO3 (NS) solution. CuO has been characterized, and the effects of reactants concentration, additives, temperature, pH and powder size on NO absorption process have been evaluated. The selectivity of N2O can drop from 91.30% to 11.25% under the optimum experimental conditions. Furthermore, based on the method of single-factor analysis, the inhibition of N2O is identified as the coeffect of NS/CuO. In addition, the pathways of NO removal are divided into two parts—N2O formation and NO absorption—and its ratio is calculated in the range of 0.29–0.53. Because of the continuous supply of NS from ammonia desulfurization, this study opens the feasibility of simultaneous desulfurization and denitrification.
研究领域:
环境科学
·
化学工程
·
大气污染控制
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 17
·7333-7346
·
IF 4.5
Yasin Umsalama Abuelgasim Abubakr,Ahmed Md. Maruf,Zhang Juan,Jia Zhixin,Guo Tianyu,Zhao Ruihua,Shi Jiahui,Du Jianping
Design and development of high-effective photocatalysts to remove multiple organic pollutants are a great challenge. Herein, the band structure of CuO is regulated by constructing the heterostructures between AgBr and CuO, which is realized by controlling hybrid morphologies. The as-prepared AgBr/CuO material consists of CuO nanoflakes and AgBr nanoparticles. Notably, AgBr nanoparticles are adhering on the surface of CuO nanosheets, which favors the formation of heterojunction with point to plane contact and fasten electron transfer. The photocatalytic results show that the AgBr/CuO photocatalyst, prepared by using the 0.1 mol AgNO 3 and KBr as raw materials, presents superior photodegradation activity toward degradation of multi-pollutants with dye concentration of 15 mg L −1 and pH = 7. The methyl violet removal rate reaches 98% within 60 min in the present of 0.1 g catalyst under visible light, and rhodamine B and methyl blue are degraded to 98 and 78% within 90 min. The radical trapping tests prove that photogenerated superoxide radicals (∙O 2 − ) and holes (h + ) act as the main active species in photodegradation of MV. The result indicates that point to plane-contacted heterostructure of AgBr/CuO material plays a key role and it has potential application in the environment remediation. Graphical abstract
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
CATALYSIS LETTERS
·
2024
·
IF 2.3
Meng Jiayi,Mo Hengliang,Li Tianyu,Liu Manman,Chen Yili,Li Suoding,Wan Pingyu,Lv Long,Yang Hengyu,Zhao Wenfang,Wang Luocong
Residual chlorine has a bactericidal effect, but it may react with natural organic matter in water to produce harmful substances. In this work, we report an efficient residual chlorine removal filter with activated carbon fiber (ACF) as adsorption carrier and CuO as residual chlorine degradation catalyst. Experimental results show that CuO has high catalytic efficiency and no attenuation of catalytic performance in 2924 h. The CuO is loaded on the surface of ACF by dipping-calcinating method. When the loading rate is 1.5%, the CuO distribution is uniform without defects and agglomeration. Continuous-flow experiment result shows that 1.5%-CuO/ACF filter can treat water amount 2.2 times as long as that for single ACF filter (residual chlorine concentration < 0.1 mg/L). Weak acidity and rising temperature can improve the reaction activity and increase the degradation amount of residual chlorine. The composite filter has excellent adsorption performance for Cu 2+ , showing the Cu 2+ concentration in the produced water is less than 0.1 mg/L after filter treatment, which is in line with the National Drinking Water Standards, and in agreement with the Standard for Safety Assessment of Water Transmission and Distribution Equipment and Protective Materials for Drinking Water (GB/T17219-1998) of Immersion Experiment, indicating that 1.5%-CuO/ACF filter has good stability and safety. Graphical Abstract
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
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 2
·1-9
·
IF 2.584
Ma Rongrong,Pathak Rajesh,Zheng Dongping,Zhang Yingjie,Xing Jie,Liu Junhong,Jiang Yuanyuan,Xiao Mingxing,Wu Fan
In this paper, a ZnO array is first prepared on the conductive glass by hydrothermal method, and then a seed layer of CuO nanoparticles is deposited on the surface of ZnO nanorods to form a core–shell ZnO/CuO nanoarray. Following, the dendritic CuO nanorods are grown on ZnO nanorods by hydrothermal method, constructing a three-dimensional ZnO/CuO nano-heterogeneous hierarchical structure array and applied in photoelectrochemical cell. Our three-dimensional ZnO/CuO nano-heterogeneous hierarchical structure shows obvious absorption of visible light from 500 to 900 nm. The current–time curves reveal that the photocurrent is greatly enhanced after dendritic CuO grows on the ZnO nanorod array. Furthermore, the charge dynamics processes in the core–shell ZnO/CuO nano-heterostructure array and the three-dimensional ZnO/CuO nano-heterostructure array are studied by comparing electrochemical impedance spectroscopy and intensity modulation photocurrent (photovoltage) spectroscopy. Although the photo-generated charge transfer rate in the ZnO/CuO core–shell structure is slightly faster than the three-dimensional ZnO/CuO hierarchical structure, the recombination life of the photo-generated charge is increased by nearly two orders of magnitude in the three-dimensional ZnO/CuO nano-heterostructure array. The three-dimensional ZnO/CuO nano-heterostructure array has a good potential application in the field of photoelectric conversion devices and photocatalysis.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 8
·4474-4480
·
IF 1.093
Wang Peng,Dong Tao,Li Meng,Yang Ping
CuO nanoparticles (NPs) were created in situ on the surface of one-dimensional (1D) CuFe2O4 nanotubes (NTs) by controlling the diffusion of precursors via a two-step synthesis. Fiber precursors were firstly prepared by a single spinneret electrospinning
method. A subsequent heat-treatment made the removal of polymers from the precursor fibers. The controlling of molar ratio between Cu and Fe and heating temperature resulted in the morphology change of products. The part of Cu precursors reacted with the Fe precursor to form CuFe2O4
and excess part was diffused to the surface to create CuO NPs. And the density of these NPs could be changed by adjusting the molar ratios of Cu and Fe precursors. CuO NPs were uniformly distributed on the surface of tubular CuFe2O4 fibers using a Cu/Fe molar ratio of
0.65 at 500 °C. Diffusion, nucleation, and growth processes are crucial for the formation and dispersion of CuO NPs. The results of CR adsorption and CO catalytic oxidation indicate that a proper surface structure can play a decisive role in the adsorptive property of the material.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 11
·3623
·
IF 3.4
Arif Ullah Khan,Muhammad Tahir,Fazal Ul Nisa,Mizna Naseem,Iqra Shahbaz,Zeyu Ma,Zilu Hu,Abdul Jabbar Khan,Muhammad Sabir,Liang He
Metal-oxide-based gas sensors are extensively utilized across various domains due to their cost-effectiveness, facile fabrication, and compatibility with microelectronic technologies. The copper (Cu)-based multifunctional polymer-enhanced sensor (CuMPES) represents a notably tailored design for non-invasive environmental monitoring, particularly for detecting diverse gases with a low concentration. In this investigation, the Cu-CuO/PEDOT nanocomposite was synthesized via a straightforward chemical oxidation and vapor-phase polymerization. Comprehensive characterizations employing X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and micro Raman elucidated the composition, morphology, and crystal structure of this nanocomposite. Gas-sensing assessments of this CuMPES based on Cu-CuO/PEDOT revealed that the response current of the microneedle-type CuMPES surpassed that of the pure Cu microsensor by nearly threefold. The electrical conductivity and surface reactivity are enhanced by poly (3,4-ethylenedioxythiophene) (PEDOT) polymerized on the CuO-coated surface, resulting in an enhanced sensor performance with an ultra-fast response/recovery of 0.3/0.5 s.
研究领域:
材料科学
·
环境监测
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Advanced Dielectrics
·
2014
·
IF 0
Juan Li,Renli Fu,Yue Xu,Zhenxiao Fu,Hongjuan Su
The TiO 2 ceramics doped with nano CuO were fabricated by the conventional solid-state reaction method. The crystal structure, microstructure, microwave dielectric properties and lattice vibrations of TiO 2 ceramics doped with nano CuO have been investigated. Nano CuO with higher sintering capability worked as flux former and effectively improved the sintering process of TiO 2 ceramics. The microwave dielectric properties of TiO 2 doped with nano CuO were much better than that doped with micron CuO at the same doping content. Raman spectra showed that the full width at half maximum of E g mode of TiO 2 doped with micron CuO was larger than nano CuO doped ones, which indicated a poor crystalline and a short phonon lifetime. TiO 2 doped with 1 wt.% nano CuO , sintered at 950°C for 2 h had compact and homogeneous microstructure and possessed the following dielectric properties: ε r = 106, Q × f = 24808, τ f = 371 ppm/°C.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
FUEL
·
2023
·
IF 7.4
Lin-Cong He,Hua-Hui Xu,Xing-Yue Leng,Ling-Yun Jin,Ai-Ping Jia,Meng-Fei Luo,Jian Chen
Selective catalytic oxidation of nitrogen containing volatile organic compounds (NVOCs) is very meaningful but still remains big challenge because it is very difficult to balance the oxidation activity and N 2 selectivity of available catalysts. In order to develop excellent catalysts with high N 2 selectivity in wide temperature window ( △T ) during NVOCs oxidation, CeO 2 modified CuO/ZSM-5 catalysts with different CeO 2 addition order were prepared for diethylamine (DEA) oxidation. Detailed characterizations of catalysts such as XRD, XPS, H 2 -TPR and NH 3 -TPD were conducted, it is found that addition of CeO 2 obviously changes the geometrical and electronic states of CuO active sites in the catalyst, and CeO 2 addition order affects the Ce 3+ ratio on the catalyst surface. Promotion of CeO 2 species enables the generation of more highly active Cu species (Cu + species and finely dispersed CuO clusters) for DEA oxidation; and synergistic catalysis of the Ce 3+ species, active Cu species and acid sites in ZSM-5 leads to the high N 2 selectivity in wide temperature window ( △T ). Compared to the CeO 2 /CuO/ZSM-5 and CuO-CeO 2 /ZSM-5 catalysts, the CuO/CeO 2 /ZSM-5 catalyst exhibits moderate high oxidation activity with T 99 of 230 °C and the widest △T of 150 °C for high N 2 selectivity. Our primary results in this work provide the efficient strategy for improving catalyst employed for NVOCs selective oxidation.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Siwen Gong,Gangqiang Zhu,Xiaoqian Xie,Fei Rao,Lujun Zhu,Yurong An,Xianjin Shi,Yu Huang,Peng Liu,Mirabbos Hojamberdiev
A novel interface of MnO 2 with CuO with multivalent conversion is fabricated by the deposition-precipitation method for low-temperature and efficient CO oxidation. It is found that the temperature for CO thermal-catalytic oxidation to reach a complete conversion significantly decreases to 105 °C for the CuO/MnO 2 . A combination of experimental and theoretical studies demonstrates the successful formation of the CuO/MnO 2 interface, inducing a pronounced effect that promotes CO oxidation. The CuO/MnO 2 interface leads to the formation of Cu-O-Mn, a superior redox system with multivalent conversion (Cu + + Mn 4+ ↔ Cu 2+ + Mn 3+ , Cu + + Mn 3+ ↔ Cu 2+ + Mn 2+ ), abundant active sites, excellent ability to activate O 2 , the rapid oxygen transfer, and more suitable adsorption energy for O 2 , CO, and CO 2 . These characteristics are advantageous to Cu x O-Mn x O y for achieving a 100 % removal of CO at a lower temperature. Furthermore, the computational study reveals that the CO oxidation process follows two mechanistic pathways (Eley-Rideal (E-R) and Mars-van Krevelen (M-K)), indicating that there is no competitive adsorption of CO and O 2 on the CuO/MnO 2 . This study shows that the interface created between suitable metal oxides can improve the catalytic performance and provides new perspective for catalyst design and performance enhancement mechanisms.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）