Materials Today Communications
·
2021
·
IF 3.383
Zhiliang Guo,Qingchun Zhang,Huiyu Liu,Hewen Zhang,Jinhao Zhang,Jin Zuo,Bo Jin,Rufang Peng
A novel metal-organic framework (MOF) precursor strategy to fabricate CuO microspheres via air-flow impacting (AFI) synthetic method was reprted in the work. The MOF precursor HKUST-1 and its derived CuO microspheres were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the catalytic activity of CuO microspheres on the thermal decomposition of ammonium perchlorate (AP) was investigated by differential thermal analysis (DTA). The results of DTA indicated that the addition of CuO microspheres to AP observably reduces the decomposition temperature due to its high contact area and much catalytic active sites. The HKUST-1 derived CuO microspheres are expected to remarkably improve the catalytic performance in AP-based composite solid rocket propellants.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Baoye Zi,Mingpeng Chen,Yumin Zhang,Qian Rong,Jicu Hu,Huapeng Wang,Jingcheng He,Shiqiang Zhou,Dongming Zhang,Jin Zhang,Qingju Liu
Formaldehyde is known as the common interior air pollutants, which can cause great damages to the human respiratory system and neural system with a small amount. Thus, it is necessary to monitor formaldehyde accurately and in real time at near-room temperature. In this work, the porous CuO hierarchical microspheres were synthesized by microwave-assisted hydrothermal method with various reaction time. As the reaction time prolongs from 1 to 7 h, the initial self-assembled CuO microspheres changes to nanoplates-coated microspheres. For CuO-5, the response of reaches 32 towards 80 ppm formaldehyde at room temperature and it also exhibits good selectivity as the response values to other test gases are lower than 5 These performances prevail over those of the other CuO samples in this experiment. The reason can be concluded that the exposed crystal faces and the active sites are different with increasing hydrothermal reaction time, resulting in different gas sensing properties. This work investigate the dependence of morphology and exposed crystal faces on gas-sensing properties in detail.
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
VACUUM
·
2018
·
IF 2.067
Yinghui Hu,Shimin Yang,Bowen Tao,Xiaolong Liu,Kaifeng Lin,Yulin Yang,Ruiqing Fan,Debin Xia,Dongyu Hao
Hollow mesoporous CuO microspheres (CuO-HM) have been prepared by a hard-template method and their structure properties as well as catalytic performance in ammonium perchlorate (AP) decomposition were fully investigated by XRD , SEM , XPS , TG/DSC and TG/F-TIR methods. The results indicated that CuO-HM could be described as CuO micro-sized spheres composed of self-assembled nanoparticles , possessing hollow and mesoporous structure. Compared with CuO nanoparticles and CuO microspheres, CuO-HM has significantly improved catalytic efficiency in AP decomposition due to large surface area, easily accessible porous and hollow structure. Typically, CuO-HM could decrease the AP decomposition temperature by 105.7 °C and enhance the heat production by 735 J/g. TG/FT-IR results indicated that CuO-HM accelerated the thermal decomposition of AP mainly at the high temperature decomposition stage with the releasing of N 2 O, NO, NH 3 , H 2 O, HCl, O 2 et al. This study demonstrated that hollow and mesoporous CuO was a promising catalyst for the application in solid fuel rockets propellants .
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Dongyu Pei,Hanbo Wang,Sheng Wan,Ziming Wang,Mingrui Yu,Zhenlu Wang,Haiyan Lu
Despite its high theoretical specific capacitance and low cost, copper oxide still suffers from insufficient utilization of active sites and poor cyclic stability when applied in asymmetric capacitors. In this work, micron-sized CuO electrode has been successfully obtained using nickel foam as substrate through an electrodeposition method. By optimizing the electrodeposition potential and designing structure, the CuO microsphere electrode delivers a high specific capacitance of 985 F g −1 at 1 A g −1 . Furthermore, the asymmetric capacitor assembled with CuO electrode and activated carbon electrode exhibits a maximum energy density of 44.5 Wh kg −1 at 1600 W kg −1 and a long lifespan of 93.4% capacitance retention after 10000 cycles at 5 A g −1 . These results demonstrate that the microsphere structure contributes to maintaining excellent structural stability during long cycles and then facilitate their electrochemical kinetics and capacitive performances. This work presents a novel strategy for designing and enhancing micron-sized positive electrodes for high-performance asymmetric capacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 164
·期 2
·B40
·
IF 3.014
Wen Zhang,Gan Jia,Hui Li,Shuo Liu,Chunwei Yuan,Yunfei Bai,Degang Fu
Surface texture of a nanostructured electrode plays a key role in electrochemical application. Here we reported the CuO microspheres with different nanostructures covered nickel foam skeleton obtained via controllable synthesis strategy with the assistance of urea, and their performance in nonenzymatic glucose sensor and supercapacitor applications. The suitable nanostructures are conductive to pave the way to provide sufficient interfacial contact between electrode and electrolyte. The twin CuO microspheres composed of ultrathin nanoslices being ∼6 nm in thickness and presented well-defined mesoporous nanostructure. The glucose sensor based on the twin CuO nanoslice sphere/Ni foam composite electrode had two wide linear response ranges with ultrahigh sensitivity of 1.864×104 μA mM−1 cm−2 from 1 μM to 100 μM and 160.6 μA mM−1 cm−2 from 1 mM to 8 mM, and a remarkable lower detection limit less than 60 nM (S/N = 3), with a response time as fast as 3 s. Besides, we demonstrated that the electrode was capable of delivering superior areal specific capacitance of 425 mF cm−2 at current density of 0.5 mA cm−2 with excellent cycling stability. Moreover, the investigation of the effects of CuO surface morphology on the interfacial processes can be extended to a wide range of electrochemical systems.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2014
·Vol. 45
·期 2
·131-138
·
IF 2.147
Fan Yang,Yang Xin,Cao Zhen,Chen Shufang,Zhu Bing
Mesoporous CuO microspheres with core-in-hollow-shell structure were synthesized by one-pot hydrothermal method, using dicyandiamide as hydrolysis agent and poly(vinylpyrrolidone) as soft template. The as-synthesized CuO microspheres were characterized by powder X-ray diffraction, field-emission scanning electron microscopy and N 2 sorption measurements. The core-in-hollow-shelled CuO microspheres exhibit greatly enhanced amperometric response towards glucose as compared to that of the simple hollow counterpart. The as-developed non-enzymatic glucose sensor exhibited favorable performance with wide linear range (0.005–7.95 mM), sensitivity of 622.2 μA mM cm −2 and low detection limit of 1 μM.
研究领域:
材料科学
·
分析化学
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Shuyu Wang,Xiaohui Wu,Lijuan Ren,Xian Pei,Hui Fang,Ping Lv,Ning Nan,Xianwei Lv,Xianming Zheng,Feihe Ma,Yun Wu,Yuping Liu,Linqi Shi
Adsorbents with high selectivity and adsorption capacity are of significant interest for the removal of dye pollutants. Herein, we report a facile low-temperature solvothermal synthesis of clew-like Cu2O/CuO microspheres by using cupric acetate monohydrate as the copper resource and ethylene glycol as the solvent and morphology modulator. The synthesized Cu2O/CuO microspheres showed high selective adsorption to anionic dyes (e.g., methyl orange (MO) and Reactive Red 2 (RR2)) rather than to cationic dyes (e.g., methylene blue (MB), Rhodamine B (RhB)). MO was then selected to evaluate the parameters of adsorption due to the adsorbent exhibiting the highest adsorption capacity for MO. We demonstrate that the adsorption of MO by Cu2O/CuO microspheres has a good correlation with the pseudo-second-order model and Langmuir isotherm with a maximum adsorption capacity of 826.45 mg/g, which is higher than that of previously reported metal oxide material adsorbents. The excellent adsorption ability of clew-like Cu2O/CuO microspheres to MO may be attributed to the synergistic effects of electrostatic attraction, unique hierarchical structure, and crystal defects of the prepared Cu2O/CuO microspheres. We believe our work provides new insight into the synthesis of high-performance adsorbents.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Yujie Yu,Chao Yu,Rufei Gao,Jun Chen,Hangtian Zhong,Yilin Wen,Xingduo Ji,Jiahao Wu,Junlin He
We fabricate a novel electrochemical biosensor based on the specific thymine-Hg 2+ -thymine (T-Hg 2+ -T) base pair for the highly sensitive detection of mercury ions (Hg 2+ ) and utilize toluidine blue (TB) as a redox indicator that is combined with a hybridization chain reaction (HCR) for signal amplification . The dandelion-like CuO (D-CuO) microspheres that were assembled using Au nanoparticles were first introduced as support materials, which produced more active sites for the thiolated probe (P1) combination. Then, the presence of Hg 2+ induced P1 to hybridize with the other oligonucleotide (P2) through Hg 2+ -mediated T-Hg 2+ -T complexes. In addition, the partial sequence of P2 acted as an initiator sequence, which led the two hairpin DNA (H1 and H2) strands to collectively form the extended double-strand DNA through the HCR process on the electrode surface . TB was employed to interact with the double strands and produce an efficient electrochemical signal. The proposed strategy combined the amplification of the HCR and the inherent redox activity of TB and utilized D-CuO/Au composites, which exhibited high sensitivity for Hg 2+ determination. Under the optimum conditions, the proposed biosensor showed a prominent response for Hg 2+ , including a linear range from 1 pM to 100 nM and a detection limit of 0.2 pM (S/N = 3). Moreover, the new biosensor proved its potential application for trace Hg 2+ determination in environmental water samples.
研究领域:
分析化学
·
环境科学
·
纳米技术
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）