ChemElectroChem
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2021
·Vol. 8
·期 11
·2101-2107
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IF 4.59
Ying Wang,Ran Du,Jinjie Qian,Yue Hu
Graphical Standing tall : Herein, a type of hierarchically ultra-fine CoP attached onto nanostructured CuO nanowire flowers (CuO NWF-CoP/CF) has been conveniently obtained by electrodeposition method, which exhibits outstanding oxygen evolution reaction activity with a small overpotential of 230 mV to achieve a current density of 50 mA cm −2 in 1.0 M KOH together with a satisfying long-term stability. The facile fabrication of high-performance and low-cost photo-/electro-catalysts for oxygen evolution reaction (OER) still presents a tough challenge. Herein, a type of hierarchically ultra-fine CoP attached to CuO nanowire flowers (CuO NWF-CoP/CF) has been obtained by a simple electrodeposition method. Due to the merits of the 3D hierarchical structure with large surface areas, rich active sites, and open-channels for effective gas diffusion, as-achieved CuO NWF-CoP/CF catalysts exhibit outstanding OER activity with an overpotential of 230 mV for OER to achieve a current density of 50 mA cm −2 in alkaline media. This work provides a novel method to prepare hierarchical self-supported electrocatalyst towards efficient water splitting.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2022
·
IF 10.681
Boshu Jiang,Qiming Sun,Bachirou Guene Lougou,Hao Zhang,Xian Li,Zhibin Qu,Yong Shuai,Chi-Hwa Wang
The solar-driven thermochemical CO 2 conversion is an effective way to achieve the mission of carbon peaking and carbon neutrality . However, finding a material with excellent thermal stability, oxygen exchange capacity, and CO selectivity is one of the most important challenges in the thermochemical CO 2 conversion approach. This study investigated the solar thermochemical CO 2 -splitting characteristics through the synergistic thermal catalytic activity of CuO and NiFe 2 O 4 and the effect of SiC photothermal properties. The thermochemical redox cycling performance of CO 2 conversion through thermally activated catalysts was experimentally investigated via thermogravimetric combined quantum chemical calculations to provide comprehensive insights into the physicochemical principles underlying the thermochemical catalytic CO 2 -splitting. The X-ray diffraction, scanning electron microscopy, and energy spectrum detector technics were developed to gain detail on the crystal structure, surface morphology , and chemical composition changes in the reacting media. The newly synthesized composite material consisting of 25%CuO and 75%NiFe 2 O 4 (CNF-13) coated SiC porous skeleton resulted in higher CO 2 -splitting catalytic activity with an instantaneous CO production of 10.98mL ⋅ min ‐1 g CNF‐13 −1 and direct CO 2 -to-CO conversion rate of 33.9% at 1000–1200 K reaction temperature. The thermochemical CO 2 -splitting activity and redox stability of CNF-13@SiC was promoted by the photothermal properties of SiC support and the formation of Cu 2 O and Fe 3 O 4 new active material phases easing CO 2 reduction at low energy. This study provided experimental and theoretical findings that can be used as guidance for the fundamental research and application of CO 2 catalytic conversion into fuels through a solar thermochemical driven strategy.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 26
·10073-10080
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IF 0
Xiaozhe Zhang,Shaodong Sun,Jian Lv,Linli Tang,Chuncai Kong,Xiaoping Song,Zhimao Yang
We have demonstrated a facile anion-assisted strategy for the synthesis of nanoparticle-aggregated CuO nanoellipsoids. Structural and morphological evolutions were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and field-emission scanning electron microscopy (FESEM). The nanoparticle-aggregated CuO nanoellipsoids serve as a promising electrode material for a non-enzymatic glucose biosensor which shows high sensitivity, good reproducibility, a fast amperometric response and good selectivity. The study is of great importance in the bottom-up assembly of tunable ordered architectures, and offers a chance to understand the formation mechanism and fundamental significance of an anion-assisted strategy for the synthesis of metal oxides. Significantly, it is believed that the anion-assisted synthetic approach reported here could provide a facile way to design more novel metal oxide architectures with well-defined shapes.
研究领域:
材料科学
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生物传感器
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电化学
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产品关联
DOI
NEW JOURNAL OF CHEMISTRY
·
2025
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IF 2.5
Ling-Qi Li,Xiao-Hui Wang,Ze-Nong Zhang,Si-Mian Liu,Xiao Wang,Shu-Ni Li
Electrocatalytic nitrate reduction (NO3−RR) provides an environmentally friendly alternative to the traditional Haber–Bosch technology for ammonia (NH3) production. Herein, cupric oxide (CuO) nanorods (NRs) were synthesized by a simple one-pot method and applied as NO3−RR electrocatalysts. Due to the nanorod-like structure and large specific surface area, the CuO NR electrocatalyst exhibited excellent NO3−RR performance. The electrocatalyst experienced in situ reconstruction and its phase partly changed from CuO to Cu/Cu2O in the process of the NO3−RR. The formed Cu/Cu2O/CuO mixed valence state promoted its catalytic activity for the NO3−RR. At −0.7 V potential, the faradaic efficiency and NH3 yield could reach 94% and 28.76 mg h−1 mgcat−1, respectively, along with excellent durability for 10 h.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yan Zhang,Jing He,Ruixia Shi,Ping Yang
CuO fibers were successfully fabricated by a simple electrospinning method, followed by calcination. Some experimental parameters such as the content of Cu(NO 3 ) 2 ∙3H 2 O, the content of PVP, the stirring time, the applied voltage, as well the calcination temperature were investigated, respectively, and their influences on the morphologies of fibers and the spinnability of precursor solution were analyzed. The CuO fibers calcined at 550 °C consisted of numerous CuO grains exhibited a well-crystalline structure. Furthermore, the CuO fibers demonstrated effective photo-Fenton degradation to methyl orange with the assist of H 2 O 2 and the adding volume of H 2 O 2 affects the degradation activities greatly. The degradation rate of methyl orange by the CuO fibers in the presence of 238.8 mmol/L H 2 O 2 is 3.8 times as much as one by P25 alone under the irradiation of Xe lamp. The degradation ratio of methyl orange could achieve 83% in 180 min. The enhanced photocatalytic activities of the CuO fibers were attributed to two aspects: one is the well-crystalline of CuO fibers; the other is that H 2 O 2 accepted the photogenerated electrons and holes effectively, which not only prevented the recombination of charge carriers but also produced additional OH. In this work, the formation and photocatalysis mechanisms of CuO fibers were also investigated.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2012
·Vol. 15
·期 7
·1339-1344
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IF 3.842
Wei Wang,Zhenyu Feng,Wei Jiang,Jinhua Zhan
Porous CuO–Ag nanofibers have been synthesized via a combination of the electrospinning technique and the PVP-assisted sol–gel technique in the absence of any templates. The thermal behavior of the as-spun fibers was characterized by TG-DSC while FT-IR was employed to prove the removal of the polymer, which resulted in a porous structure. The structure and morphology of the resultant products were characterized by XRD, TEM and SEM. Porous CuO–Ag nanofibers fabricated on a Si substrate exhibited large Raman enhancement ability, which was also investigated. The SERS signals on the obtained substrate had perfect temporal stability under continuous laser radiation and a good uniform response, enabling quantitative detection of analyte azobenzene. The log–log plot of the SERS intensity to the azobenzene concentration exhibited a good linear relationship.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2023
·
IF 8.8
Jingxuan Wang,Xiaoxiang Cheng,Peijie Li,Qingshui Fan,Daoji Wu,Heng Liang
To achieve excellent activation efficiency of peroxymonosulfate (PMS), this work prepared a biochar-supported CuO (CuO@BC) catalyst, and the CuO@BC/PMS system was proposed to remove the organic matter in natural surface water and reduce the fouling of ultrafiltration membrane. The successful synthesis of CuO@BC was demonstrated through characterization of its microscopic morphology and chemical composition by various techniques. The prepared heterogeneous catalyst showed a strong catalytic effect on PMS, which significantly removed natural organic matter through the production of active substances ( • OH, SO 4 •− , O 2 •− and 1 O 2 ) from water. With respective degradation rates of 39.4% and 59.4%, the concentrations of DOC and UV 254 dropped to 1.702 mg/L and 0.026 cm −1 , respectively. Additionally, the CuO@BC/PMS oxidation displayed potent oxidation capabilities for contaminants and fluorescent organics with various molecular weights . The system effectively decreased the amount of organic matter that caused reversible and irreversible fouling of polyethersulfone membranes in natural water by 85.8% and 56.3%, respectively. The main fouling mechanisms changed as well, with standard and complete blocking dominating the entire filtration process. The results demonstrated the capacity of the CuO@BC/PMS system to remove contaminants in natural water and mitigate membrane fouling.
研究领域:
环境科学
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水处理技术
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催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2020
·Vol. 64
·期 1
·65-70
·
IF 2.302
Chen Fang,Shao Bo,Zhai Wei,Ma XiaoYan
The fabrication of high performance CuO based glucose sensors remains a great challenge due to the “trade-off effect” between sensitivity and linear range. In this study, a hierarchical CuO nanostructure with a great number of firecracker-shaped nanorods along the ligament and three-dimensional interconnected nanoporous is obtained by dealloying and post oxidation process of Al-33.3 wt% Cu eutectic alloy ribbons. Because of the precise structural design, not only the number of active sites for glucose electro-oxidation is significantly increased but also the glucose diffusion under high concentration is greatly accelerated, leading to a high sensitivity of 1.18 mA cm −2 mM −1 and a wider linear range up to 5.53 mM for glucose detection. This work provides a potential approach to design hierarchical nanostructure for other metal oxides with desirable properties for electrocatalytic applications.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Longjun Guo,Wei Liu,Chunqing Wang
Nanoscale Ag-decorated CuO/SnO2 heterojunctions with coralloid hollow porous structure (ACSO HPs) were successfully synthesized though a hydrothermal route with electroless Ag plating followed by the calcination and acid-washing. Detailed microstructural characterizations confirmed that the hollow porous structure comprised CuO/SnO2 and Ag/SnO2 nanoheterojunctions, and the SnO2 surface was decorated primarily with nano-Ag, which was the outer layer of the structure. The ACSO HPs sensor displayed a higher response to isopropanol compared to toluene, acetone, benzene, ethanol, and methanol than other samples. For 100 ppm isopropanol, the ACSO sensor exhibited a faster response time (6 s) and a higher recovery time (34 s) than undecorated Ag samples. The improved sensing performance of ACSO samples was ascribed to the synergistic effect of the CuO/SnO2 nanoheterojunctions with the dramatic sensitization of the decorated nano-Ag, as well as the HPs.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 19
·6796-6800
·
IF 0
Yusheng Xia,Xuxin Pu,Jie Liu,Jie Liang,Pujun Liu,Xiaoqing Li,Xibin Yu
Various-sized arrays of CuO nanoleaves (NLs) were fabricated on a pyramid-textured c-Si wafer. The CuO NL/c-Si solar cells show a great increase of the optical absorption and a reduction of the reflectance in the 250–1250 nm wavelength range, compared to the reference one. The c-Si solar cell integrated with CuO NLs generates the graded index of refraction between the surface of Si and air, and improves the light utilization efficiency by increasing the light-trapping effect and forming resonant optical modes, which leads to multiple scattering of the incident light. In addition, the deposition of p-type CuO NLs on the surface of the Si wafer can form a CuO NL/c-Si junction and generate a built-in potential, which is beneficial for the separation of photogenerated electrons and holes, leading to the minority carrier lifetime (τeff) increase from 5.7 to 15.0 μs. The CuO NL/c-Si structure reduces the optical loss, improves the carrier collection, and distinctly enhances the c-Si solar cell efficiency. The experimental results indicate that short-circuit current and power conversion efficiency of CuO NL/c-Si solar cells increase by 10.30% and 17.90%, respectively. The CuO NL/c-Si structure is expected to exceed the Shockley–Queisser limit of the single junction solar cells.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Miao He,Yuting Xie,Zihui Ni,Xuzhong Zeng,Hebin Bao,Xiaodi Wu,Li Liu,Xueming Li,Qihui Wang
Based on the superior exothermic properties, Al/CuO nanothermites are considered as one of the most promising energetic materials in recent years. In this work, the CuO nanospheres with particle size of 100–120 nm were successfully synthesized by a simple solution route and subsequent heat treatment, and used as oxidizer of Al/CuO nanothermites. The electrophoretic deposition kinetics of Al/CuO nanothermites were investigated in detail. Then, the morphology and composition of the as–prepared Al/CuO nanothermites were characterized by means of scanning electron microscopy (SEM), X–ray diffraction (XRD), X–ray photoelectron spectroscopy (XPS), and spectrophotometry. The results show that the electrophoretic deposition behavior of Al/CuO nanothermites is controlled by diffusion. Furthermore, there is a linear relationship between the equivalent ratio in the suspension (Ф d ) and the deposited film (Ф s ). The Ф d can be precisely adjusted by changing the electrophoresis parameters. When the equivalent ratio of Al/CuO nanothermites in the suspension is 1.5, the heat release of the sample can reach up to 1977 J/g. This work provides a new strategy for the preparation of nanothermites by electrophoretic deposition.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Shanshan Shao,Weicheng Wang,Xinyu Yang,Zian Ye,Jiayuan Sun,Xiaohua Li
A novel method was proposed for biomass fast pyrolysis oil upgrading using catalytic transfer hydrogenation (CTH) based on various CuO catalysts with methanol as the hydrogen donor. The carbonyl compounds in the bio-oil were hydrogenated to synthesize alcohols using a hydrotalcite-like Cu 2 Al catalyst at 200℃ for 4 h. The maximum yield of alcohols reached 73.81%. Cu 2 Al is well applicable to large-scale application in bio-oil CTH for its excellent CTH performance, treating capacity up to 10 vol%, and stable alcohol production during the 5th reuse process. Given the huge range of molecular size of the complex chemical composition of bio-oil, the CTH of raw bio-oil using three catalysts (i.e., CuO/BC, CuO/Al 2 O 3 , and Cu 2 Al) was compared. The CTH performance (71.56%) of CuO/Al 2 O 3 was significantly comparable to that of Cu 2 Al, and it is also a good choice. The main reason for this outcome was that the average pore size of the two catalysts was high (>5nm), which reduced the possibility of pore blockage during the reaction and improved stability. The reusability of CuO/BC was markedly lower for its small average pore size (∼2nm). Furthermore, the CTH of raw bio-oil over CuO catalyst was discussed in depth, such that a basis is laid for the upgrading and utilization of bio-oil.
研究领域:
化学工程
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）