JOURNAL OF CATALYSIS
·
2021
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IF 7.92
Zhenhua Zhang,Liping Fan,Weiqi Liao,Feiyue Zhao,Cen Tang,Jing Zhang,Ming Feng,Ji-Qing Lu
Several CeO 2 -CuO/Cu 2 O nanocomposites with different CuO structures were used to identify the structure sensitivity of CuO in the CeO 2 -CuO/Cu 2 O catalyzed CO oxidation. The CO oxidation catalyzed by various CuO-CeO 2 interfacial sites involves a typical Mars-van Krevelen mechanism, in which the CuO-CeO 2 interfaces in the CeO 2 -CuO/c-Cu 2 O (cubes) nanocomposites are more intrinsically active, exhibiting ca. 15 kJ mol −1 lower activation energy than those in the CeO 2 -CuO/o-Cu 2 O (octahedra) and CeO 2 -CuO/d-Cu 2 O (rhombic dodecahedra) nanocomposites at CeO 2 loadings no less than 0.75 wt%. The higher activity is relevant to lower coordinated oxygen ions on CuO/c-Cu 2 O surface and thus better CO reactivity for the CeO 2 -CuO/c-Cu 2 O nanocomposites, which therefore indicates that the active oxygen species on CuO-CeO 2 interface should come from CuO rather than CeO 2 . Moreover, a highly active 13.2 %CeO 2 -CuO/c-Cu 2 O(s) catalyst for CO oxidation is realized on fine Cu 2 O cubes, which thus has high density of active sites.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 22
·13193-13200
·
IF 3.361
Nannan Zhang,Yuxi Meng,Yuxue Ning,Andrew E. H. Wheatley,Fang Chai
The enormous and urgent need to explore cost-effective catalysts with high efficiency has always been at the forefront of environmental protection and remediation research. This work develops a novel strategy for the fabrication of reusable CuO-based non-noble metal nanomaterials as high-efficiency catalysts. We report a facile and eco-friendly synthesis of CuO hexapods and CuO–Ag composite using uric acid as a reductant and protectant. Both exhibited high catalytic activity in the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride (NaBH4), with the CuO–Ag composite showing superior catalytic performance. Notably, the highest turnover frequency of CuO–Ag reached 7.97 × 10−2 s−1, which was much higher than numerous noble-metal nanomaterials. In addition, CuO hexapods and CuO–Ag composite were also shown to act as highly efficient and recyclable catalysts in the degeneration of 4-NP. Both CuO hexapods and the CuO–Ag composite exhibited outstanding catalytic durability, with no significant loss of activity over more than 10 cycles in the hydrogenation of 4-NP.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2023
·
IF 7.3
Tao Li,Yuhua Li,Peiyan Qin,Gehong Wei,Chun Chen
Phytophthora sojae is an oomycete pathogen that causes significant agricultural losses worldwide, mainly the soybean damping-off and root/stem rot. To counter this, copper oxide nanoparticles (CuO NPs)/reduced graphene oxide (rGO) composites (CuO-rGO) have been proposed as a potential solution in nano-agriculture. In this study, we aimed to investigate the inhibitory mechanisms of CuO-rGO, CuO NPs, and CuCl2 on P. sojae through phenotypic and transcriptomic analysis. Even a low concentration of 10 mg Cu2+ L−1, CuO-rGO, CuO NPs, and CuCl2 exhibited remarkable inhibitory effects on the pathogen. This was due to the capacity of these three forms of Cu to induce oxidative stress, which caused disruptions in the mycelial cell membrane, intracellular structure, carbon metabolism, organic acid metabolic processes, and amino acid metabolism. Among them, CuO-rGO showed a better slow-release effect and long-lasting antimicrobial properties, making it more suitable for practical agricultural use. Furthermore, the transcriptomic analysis revealed distinct patterns of antioxidant enzyme-related genes among treatments. Compared to the other two treatments, the CuO-rGO treatment showed higher expression of differential expression genes (DEGs) associated with superoxide dismutase (SOD) and peroxiredoxin (PRDX). The CuO NPs treatment had the most significant expression of DEGs related to catalase (CAT), while the DEGs linked to glutathione peroxidase (GPX) were significantly expressed in the CuCl2 and CuO-rGO treatments. These findings suggest that CuO-rGO has great potential as a practical agricultural agent against oomycete pathogens. Further investigations are essential to elucidate the mechanisms underlying the oxidative stress and antioxidant systems induced by different copper forms in the future.
研究领域:
农业
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微生物学
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纳米技术
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植物病理学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2017
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IF 1.025
Ning Zhou,Meng Yuan,Dongsheng Li,Deren Yang
A time- and energy- saving solution-based chemical precipitation method was developed to synthesize leaf-like CuO nanostructures. The morphology and size of the leaf-like CuO nanostructures could be simply manipulated by controlling the type and concentration of precursors, and the oriented attachment mechanism is responsible for the formation of leaf-like shape. With the concurrent reduction reaction and at appropriate concentration, CuO/Ag microspheres could be prepared and the growth mechanism is proposed. These two structures could serve as effective photocatalyst for the degradation of rhodamine B under visible light irradiation in the presence of hydrogen peroxide. Moreover, compared to pure CuO nanostructures, the photodecomposition activity of CuO/Ag microspheres increases by 42.9% due to plasmon-enhanced light absorption.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Xiao-Cong Zhang,Song-Hai Wu,Shao-Yi Jia,Cong Wang,Shi-Wei Sun,Xiang-Ming Wang,Zi-He Meng,Yi-Ying Lin,Yong Liu,Hai-Tao Ren,Xu Han
Turning heterocyclic contaminants into polymers from industrial wastewater is a promising method that opens a new door for feasible and cost-effective treatment for aromatic wastewater. In this study, CuO shows the high reactivity in the catalytic oxidation of thiophene by persulfate (PS) under pH-neutral condition, and the observed rate constant ( k obs ) in the PS-CuO system is about 10 times of that in the PS-alone system at pH 7.0. The linear relationship between the consumed PS and the removed thiophene reveals that a complete removal of 1.0 mM thiophene from solution requires 1.11 mM PS in the PS-CuO system, indicating that thiophene has not been completely mineralized into CO 2 and H 2 O. Quenching experiments and EPR analysis rule out contributions of O 2 •− and 1 O 2 to thiophene oxidation, and suggest that although both SO 4 •− and •OH contribute to thiophene oxidation to some extent, they are not the primary oxidants in the PS-CuO system at pH 7.0. Meanwhile, the presence of thiophene radical cation indicates that electron abstraction from thiophene is an important pathway in the oxidation. The produced thiophene radical cations are then polymerized into polymers. Solid characterizations further confirm that polythiophene S,S -dioxide is the primary oxidation product. The electrochemical analysis indicates that the produced polythiophene S,S -dioxide polymers show pseudocapacitive characteristics and can be used for capacitors.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xu Ji,Weicong Xu,Chao Liu,Xing Wang
The electrocatalytic CO₂ reduction reaction (CO₂RR) offers a promising pathway for carbon cycling and high-value fuel synthesis. However, the efficient production of ethylene (C₂H₄), a critical multicarbon product, remains constrained by insufficient catalyst activity and selectivity. Although copper-based materials enable C–C coupling, conventional CuO catalysts suffer from imbalanced *CO intermediate adsorption strength and sluggish charge transfer kinetics.In this study, a silica (SiO₂) doping strategy was employed to synergistically modulate the electronic structure and surface active site distribution of CuO, significantly enhancing CO₂-to-C₂H₄ conversion efficiency. Experimental results demonstrate that SiO₂ incorporation induces local electronic density rearrangement around Cu²⁺, stabilizing *CO adsorption, while the constructed Cu-O-Si interfaces accelerate charge transfer, enhances electron transfer and reduce the energy barrier for *COCHO formation. The optimized SiO₂-10%/CuO catalyst achieves a C₂H₄ Faraday efficiency of 42% and a partial current density of 6.3 mA/cm² at −1.4 V (vs. RHE), representing a threefold improvement over pristine CuO. Notably, the catalyst exhibits exceptional stability over 4 hours.Structural characterization and theoretical calculations reveal that SiO₂ doping promotes the self-assembly of CuO nanosheets into flower-like architectures with a high specific surface area and exposes synergistic (111)/(002) facets, which collectively enhance *CO intermediate enrichment and directional coupling. This work provides novel insights into designing high-performance CO₂RR catalysts through multidimensional modulation strategies.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Qi Zhou,Yuanyuan Zhang,Ting Zeng,Qijin Wan,Nianjun Yang
The morphology of nanomaterials affects their properties and further their applications. Herein, CuO nanomaterials with different morphologies are synthesized, including CuO nanostrips, nanowires and microspheres . After their characterization by means of electron microscopy and X-ray powder diffraction, these CuO nanomaterials are further mixed with graphene nanoplates (GNP) to explore their performance towards electrochemical detection of glucose and tetrabromobisphenol A (TBBPA). Among three composites, the composite of CuO nanostrips and GNP exhibits the largest active surface area, the lowest charge transfer resistance, and the highest accumulation efficiency toward TBBPA. Meanwhile, this composite based non-enzymatic sensor shows superior performance for the glucose monitoring. Since these sensors for the monitoring of both glucose and TBBPA possesses long-term stability, high reproducibility, and wide linear ranges and low detection limits, this work provides a strategy to tune the sensing performance of nanomaterials by means of tailoring the morphologies of nanomaterials.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Wendi Zhu,Xuhan Wang,Wei Gao
The continuous increase in industrial exhaust emissions has led to rising atmospheric hydrogen sulfide (H2S) concentrations, posing significant threats to both environmental safety and human health. In this study, four morphologically distinct Fe2O3-based gas sensors were synthesized via different surfactantassisted hydrothermal method, among which the nanorod-structured Fe2O3 exhibited optimal sensing properties. Loading CuO into this form of iron oxide sensing material to construct p-n heterojunctions, with systematic investigation of the influence of varying CuO loading concentrations on sensor performance. Systematic investigation revealed that CuO modification significantly improved the sensor response characteristics. The optimized sensor with 15 wt% CuO loading demonstrated exceptional performance, exhibiting an ultrahigh response value of 1780 toward 100 ppm H2S at the operating temperature of 125°C, along with a rapid response time of 9 s. It provides a reasonable idea for the design of highly responsive hydrogen sulfide sensors.
研究领域:
材料科学
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环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Kexin Zhu,Fuping Zeng,Zhihui Li,Langlang Lv,Hua Jiang,Guangzhi Chen,Xiangyu Wang,Ju Tang
In this study, CuO-ZnO has been found to decompose sulfur hexafluoride (SF 6 ) with the activity higher than pure metal oxides (e.g. Al 2 O 3 ). After using the organic metal nanocage ZIF-8 as a precursor, the resulting CuO-ZnO particles exhibit uniform nanoscale size and possess an excellent surface area. When these particles are mixed with CaO and reacted with SF 6 at 600 °C and 0.2 MPa, a high SF 6 conversion rate of up to 99 % is achieved, with SO 2 making up about 98 % of the sulfur-containing products. Besides, the reaction demonstrates excellent degradation efficiency and maintains good stability over a continuous 78-hour operation. The results indicate that the CuO-ZnO particles provide abundant active sites that promote SF 6 adsorption and bond cleavage. Meanwhile, CaO helps disperse the CuO-ZnO particles, inhibits sintering, and provides an oxygen source for SO 2 formation, while also facilitating the fixation of fluorine, thereby enhancing both the selectivity and stability of the reaction. In addition, we also found that NH 3 is more conducive to promoting the decomposition of SF 6 by CuO-ZnO, whereas O 2 inhibits the progression of this reaction. Considering the global warming potential and long-term environmental impact of SF 6 , the proposed approach shows high degradation efficiency, excellent stability, and selectivity, contributing to mitigating the negative impact of SF 6 on global climate change.
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
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Shuaishuai Lu,Jingde Zhang,Yuanyuan Sun,Huichao Liu
CuO-CeO 2 -ZrO 2 /cordierite catalysts have been successfully prepared by the impregnation reduction method. The effects of processing parameters such as the condition of reduction process, calcination temperature, the addition of surfactant on the size and shape of catalyst particles were studied by X-ray diffraction (XRD), BET surface area measurements, and scanning electron microscopy (SEM). The catalytic performance of the as-prepared catalysts for CO oxidation were evaluated by using a microreactor-GC system. The results indicate that the processing parameters influence greatly the size and shape of catalyst particles. Fragmental shape catalysts were formed when the impregnated samples were reduced in the thermostat water bath. However, spherical-like particles were obtained by ultrasonic-assisted in the reduction process. Tiny flower-like catalyst particles were found when the surfactant were used. When the calcination temperature decreased, the grain size of catalysts has reduced, and the catalytic activity for CO oxidation has been improved. The introduction of ultrasonic and surfactant resulted in larger specific surface area and better catalytic performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Linfeng Liang,Ke-Yu Niu,Linjie Zhang,Jiayue Tian,Kang Zhou,Xiao-Lu Wang,Xian-Ming Zhang,Maochun Hong
Tailoring relatively inert Cu oxides for high-performance oxygen evolution reaction (OER) electrocatalysts is of great practical significance but extremely challenging. Herein, CuO MCSs enriched with O vacancies have been fabricated via an appealing metal–organic framework (MOF)-based topotactic alkalization route for the first time. Mechanism analysis indicates that the formation of the CuO mesocrystal superstructure undergoes a gradual structural evolution from nanocrystal to nanobelt and then to nanosheet with escalating order. The porous two-dimensional nanosheet coupled with mesocrystal characteristic endows CuO MCSs with rich surface active sites and significantly improved electric conductivity. When served as an OER electrocatalyst in the alkaline media, the CuO MCS exhibits an overpotential of 304 mV at 10 mA cm–2 and a stable delivery of the OER current for more than 15 h, which surpasses most of the Cu oxide OER electrocatalysts ever reported. Theoretical calculations indicate that high OER activity of CuO MCSs can be traced to the modified electronic structure caused by the O vacancies, resulting in much enhanced Cu 3d–O 2p covalency as well as lifted d-band center, which alters CuO MCSs into a half-metallic nature with optimized binding strength toward O-containing intermediates for OER. This work could provide valuable insights into the design of other MOF-derived advanced catalysts for OER and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jianghui Zhao,Zhi Liu,Siew Chun Low,Zhenzhen Xu,Soon Huat Tan
Developing exquisitely structured light-absorbing materials could be a feasible approach to enhance solar evaporation performance. Herein, a CuO-nanocluster/PVDF-HFP nanofibrous thin-film skeleton/CuO-nanocluster (CPC) architecture membrane was developed via electrospinning, heating, and hydrothermal techniques. The CPC membrane architecture is similar to the triple-layer mesophyll/vein/mesophyll in a natural leaf, whereby mesophyll performs photosynthesis for plant growth and the vein acts as a support skeleton. Similarly, CPC mimicking a leaf structure possesses: (1) upper and lower hydrophilic CuO-nanoclusters to absorb sunlight, promote water supply, and prevent salt crystallization during the evaporation process; and (2) a middle nanofibrous thin-film membrane that acts as a supportive layer. The resulting CPC membrane exhibited an evaporation rate of 1.21 kg m −2 h −1 and 1.06 kg m −2 h −1 for 3.5 wt% saline water and actual industry dye wastewater, respectively. Meanwhile, the CPC membrane was applied in the cycle, continuous, and outdoor evaporation tests. In addition, the CPC membrane displayed impressive mechanical strength and flexibility, making it suitable for the long-term use in practical applications. These findings demonstrate the excellent performance of the CPC membrane for solar water evaporation and should inspire further research on developing dedicated architecture membranes for use in fields such as catalysis, sensing, energy, and other applications.
研究领域:
材料科学
·
能源工程
·
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）