APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Jiangdong Dai,Zhongshuai Chang,Atian Xie,Ruilong Zhang,Sujun Tian,Wenna Ge,Yongsheng Yan,Chunxiang Li,Wei Xu,Rong Shao
The research of superhydrophilic interface is developing rapidly, but the preparations of superhydrophilic surfaces through simple methods are still challenging. Herein, we reported a facile, rapid and environmentally-friendly approach for preparing a novel superhydrophilic and underwater superoleophobic membrane via the thermal oxidation of Cu mesh and one-step coordinated assembly of Fe(III)-CMC chelate hydrogel. Superhydrophilicity was attributed to the hydrophilicity of Fe(III)-CMC chelate hydrogel and nanoneedle-like rough structure of CuO@Cu membrane. The membrane was used to separate a variety of oil/water mixtures and exhibited excellent separation performance. Moreover, the membrane exhibited the excellent durability and superior stability against corrosion conditions. We envision that the Fe(III)-CMC@CuO@Cu membrane with good underwater superoleophobicity could provide a candidate not only for oil/water separation but also many other potential applications such as underwater oil manipulation, self-clean, and bio-adhesion control.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2019
·
IF 4.182
Yue Pan,Songshan Jiang,Wei Xiong,Derong Liu,Min Li,Bai He,Xiaolei Fan,Dong Luo
A novel heterogeneous Fenton catalyst of Cu-UiO-66 metal-organic framework (MOF) was developed for catalytic wet peroxide oxidation (CWPO) of wastewater containing the concentrated 4-chlorophenol. Cu-UiO-66 was characterized comprehensively using XRD , N 2 adsorption-desorption, SEM-EDS, TEM , H 2 -TPR and XPS analysis to reveal its physical and chemical properties. Specifically, XPS results indicated the interaction of Cu species with framework Zr element, and H 2 -TPR further proved the existence of CuO active component and thermal stability of the synthesized catalysts. The Cu-UiO-66 catalysts exhibited excellent catalytic activity in the CWPO of 4-chlorophenol wastewater (1,000 to 5,000 mg/L) with conversions of 98% achieved in 20 min and complete degradation in 40 min. Based on the detailed HPLC analysis of the reaction media, mechanistic study of the CWPO of 4-chlorophenol was performed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yumei Zhu,Jinlv Wei,Jia Wu,Rong Chen,Panagiotis Tsiakaras,Shibin Yin
The development of catalysts with suitable adsorption behavior for the reaction molecules and the elucidation of their internal structure-adsorption-catalytic activity relationships are crucial for the electrooxidation of 5-hydroxymethylfurfural (HMF). In this work, NiO-CuO heterostructures with a spontaneous built-in electric field (BEF) are specifically designed and used to regulate the OH − adsorption site for freeing up the active site of HMF for the HMF oxidation reaction (HMFOR). The mechanism driving electron pumping/accumulation of the BEF is examined by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). Electrochemical data and theoretical calculations show that BEF modulates the adsorption energy and adsorption site of substrate molecules, thereby enhancing the performance of HMFOR and hydrogen evolution reaction (HER). Notably, the NiO-CuO electrode demonstrates high 2,5-Furandicarboxylic acid (FDCA) selectivity (99.76 %) and generation rate (13.79 mmol gcat −1 h −1 ). It only requires 1.33 V to obtain a current density of 10 mA cm −2 for HMFOR-coupled H 2 evolution. This research introduces a novel approach by regulating the adsorption of reactive molecules for HMFOR-assisted H 2 evolution.
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2016
·Vol. 23
·期 12
·11611-11619
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IF 2.76
Miao Lingzhan,Wang Chao,Hou Jun,Wang Peifang,Ao Yanhui,Li Yi,Lv Bowen,Yang Yangyang,You Guoxiang,Xu Yi
The stability of CuO nanoparticles (NPs) is expected to play a key role in the environmental risk assessment of nanotoxicity in aquatic systems. In this study, the effect of alginate (model polysaccharides) on the stability of CuO NPs in various environmentally relevant ionic strength conditions was investigated by using time-resolved dynamic light scattering. Significant aggregation of CuO NPs was observed in the presence of both monovalent and divalent cations. The critical coagulation concentrations (CCC) were 54.5 and 2.9 mM for NaNO 3 and Ca(NO 3 ) 2 , respectively. The presence of alginate slowed nano-CuO aggregation rates over the entire NaNO 3 concentration range due to the combined electrostatic and steric effect. High concentrations of Ca 2+ (>6 mM) resulted in stronger adsorption of alginate onto CuO NPs; however, enhanced aggregation of CuO NPs occurred simultaneously under the same conditions. Spectroscopic analysis revealed that the bridging interaction of alginate with Ca 2+ might be an important mechanism for the enhanced aggregation. Furthermore, significant coagulation of the alginate molecules was observed in solutions of high Ca 2+ concentrations, indicating a hetero-aggregation mechanism between the alginate-covered CuO NPs and the unabsorbed alginate. These results suggested a different aggregation mechanism of NPs might co-exist in aqueous systems enriched with natural organic matter, which should be taken into consideration in future studies.
Hetero-aggregation mechanism of CuO nanoparticles and alginate under high concentration of Ca 2+
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 29
·期 2
·1269-1279
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IF 2.019
Hu Liang,Xia Yuting,Wang Qianqian,Yang Hui,Zhang Qi-long
In this work, a core–shell dendritic CuO@TiO 2 was constructed through a two-step chemical method. Structural analysis confirms the successful coating of TiO 2 on the CuO and the dendritic morphology was maintained after the coating process. The composites were prepared by using ferroelectric P(VDF-HFP) as matrix and synthesized particles as filler. The introduction of fillers influences the melting and crystallization process of the polymer matrix without altering the composition. The insulator layer suppresses the conductivity and dielectric loss by blocking the charge carriers while the composites exhibit improved dielectric constant in the frequency wide range of 10 2 –10 6 Hz and enhanced thermal conductivity. The composite with 20% CuO@TiO 2 exhibits a high dielectric constant of 51.7, low loss of 0.11 at 1 kHz and high thermal conductivity of 0.382 W/mK, showing huge potential for dielectric applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2013
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IF 3.172
Youcheng Zhao,Xinyu Song,Zhilei Yin,Qisheng Song
Controlled synthesis of CuO with various hierarchical structures consisting of self-organized nanoparticles is realized by using n-octylamine (OLA) as a structure inducing agent via a facile hydrothermal synthetic method. The growth and assemblage of CuO can be finely tuned by selecting the preparative parameters. In particular, it is found that the degree of the hierarchical organization can be modulated by simply changing the amount of the n-octylamine and CuO nanoparticles exhibit self-assembled two-dimensional (2D) sheet-like, three-dimensional (3D) disk-like and bowknot-like architectures, respectively. In the present case, OLA serves as a capping surfactant that can modulate growth of CuO nanocrystals via hydrophobic forces between the OLA molecules. CuO nanoparticles can be self-assembled into different complex architectures depending on the strength of hydrophobic forces. Hierarchical sphere-like CuO assembled from nanorods can also be easily fabricated by adjusting the starting NaOH to CuCl 2 volume ratio, in which OLA serves not only as the structure-directing agent, but also as a weak base agent to produce hydroxyl anions. The electrochemical performances of the as-synthesized different products for sensing nitrite oxidation are evaluated. The results reveal that the electrocatalytic activity is related to the secondary nanostructures. Compared to the others, the bowknot-shaped and sphere-shaped CuO products exhibit excellent electrocatalytic activity toward nitrite oxidation and fast current response in nitrite sensing because of their peculiar hierarchical structures with high BET surface areas and well-ordered pores.
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PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2015
·Vol. 17
·期 10
·1-11
·
IF 2.184
Hu Nan,Li Rui,Wu Zhao-liang,Huang Di,Li Hong Zhen
Foam flotation is a promising technique for recovering nanoparticles from their highly diluted suspensions. In this work, a novel S type internal was developed to intensify the foam flotation of CuO nanoparticles (357.6 nm in average particle size) from their suspension of 6.2 × 10 −2 mmol/L. By enhancing foam drainage, the S type internal increased the enrichment ratio of CuO nanoparticles by 139.3 ± 12.5 % without significantly affecting their recovery percentage. Under the optimal conditions of Cetyl trimethyl ammonium bromide (CTAB) concentration 0.45 mmol/L, superficial airflow rate 2.6 mm/s, and volumetric feed rate 1.0 mL/min, the enrichment ratio and recovery percentage of CuO nanoparticles reached 81.6 ± 4.1 and 95.4 ± 4.9 %, respectively, using the foam flotation column with the S type internal. Furthermore, about 95 % CTAB could be recycled by recovering CTAB from the foamate and the residual solution. The recovered CuO nanoparticles were associated with CTAB molecules, so they had better dispersity and dispersion stability than the starting CuO nanoparticles. Therefore, they would have good reusability.
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ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Zhongchao Bai,Yuwen Zhang,Yaohui Zhang,Chunli Guo,Bin Tang
Herein, leaf-like CuO with mesoporous structure has been synthesized by treating commercial Cu(OH) 2 powder at room temperature for an appropriate time. The BET measurement shows that the obtained CuO has a high surface area of 23.55 m 2 g −1 and narrow pore distribution peaking at about 3.3 nm. The electrochemical performances of leaf-like mesoporous CuO are evaluated by cyclic voltammetry and galvanostatic charge-discharge studies. Electrochemical results show that the as-prepared CuO are promising anode materials in LIBs including high specific capacity, good retention and rate property. Even at the high current density of 2000 mA g −1 , the mesoporous CuO electrode still can maintain a specific capacity of 490.5 mAh g −1 which is much higher than the theoretical specific capacity of graphite (372 mAh g −1 ).
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MICROPOROUS AND MESOPOROUS MATERIALS
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2017
·
IF 3.615
Fu Yang,BangBang Wang,Shijian Zhou,Saifu Long,Xianfeng Liu,Yan Kong
Micropore can efficiently tailor the diffused rate of reactant molecule in heterogeneous catalysis and enhance collision frequency with catalytic active sites, hence increasing catalytic properties. In this study, boosting catalytic activity for olefins epoxidation was obtained using micropore-enriched CuO-based silica catalyst. This special catalyst incorporated with highly-dispersed copper oxides was directly fabricated with anionic surfactant chelating Cu 2+ as the template. Dispersed CuO species were in situ produced and encapsulated in the channels of mesoporous silica , avoiding the repeated calcination in the conventional modification process. Meanwhile, massive micropores (ca. 1.6 nm) were directly formed. In addition, to receive optimal catalytic performance, controllable amounts of Cu 2+ were employed for modifying anionic micelles . This obtained catalyst exhibited obviously stronger reducibility and better dispersity of CuO in comparison with the post-impregnated sample, more interestingly, the introduction of Cu 2+ in the assemble process improved structural properties of silica. In addition, a proper loading (Cu/Si = 4.34%) of CuO was found to be preferable in the catalytic process. Finally, catalytic results revealed that the micropore-enriched catalyst exhibited obviously higher catalytic activity as compared to the mesoporous catalyst, and its further applications in various olefins epoxidation were preferable.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Meng Zhang,Xintong Lv,Tianqi Wang,Wenyuan Pei,Ying Yang,Feng Li,Duanduan Yin,Hui Yu,Xiangting Dong
In this paper, polyoxometalates (POMs) electron acceptors were introduced into a classical p-type gas sensitive ceramic-copper oxide (CuO). Then, we investigated the effect of phosphomolybdic acid (PMA) on the sensing performance of CuO gas sensors. The results show that by introducing PMA, the response of CuO gas sensor to 100 ppm ethanol gas can be effectively improved to 2.78. This promotion may be due to the electron trapping effect of PMA, which promotes the carrier migration and inhibits its recombination. Simultaneously, the response and recovery time of the sensor is only 5 s and 4 s. Other gas sensing parameters of the sensors were also comprehensively investigated. The mechanism analysis shows that PMA, as an electron-transport mediator, can trap electrons in the conduction band of CuO, generate shallow electron traps, and effectively inhibit the recombination of electrons and holes in CuO, thereby enhancing gas sensing performance. This work provides a new idea for the advance of CuO-based gas sensors with enhanced sensing sensitivity using polyoxometalates as electron acceptors .
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Zhiyuan Ni,Tao Yu,Xiang Li,Chunming Liu,Junhua You,Xuanwen Liu,Rui Guo,Hangzhou Zhang,Hongyu Li
Electrochemical carbon dioxide reduction (ECR), which converts carbon dioxide into valuable chemical substances, effectively achieves sustainable carbon neutrality. In this study, we report that CuO catalysts with varying vacancy (CuO-O V ) concentrations and morphological structures. CuO-O V can significantly enhance the selectivity for ethylene (C 2 H 4 ) and multicarbon products (C 2+ ) by reducing the free energy required for the formation of ∗CHO intermediates from ∗CO hydrogenation and lowering the energy barrier for C-C coupling reactions. The CuO(NaOH) catalyst exhibited a maximum Faradaic efficiency of 55.7% for the C 2+ product at -1.36 V vs. RHE. And C 2 H 4 displays a maximum Faradaic efficiency of ∼32.7% at -1.56 V vs. RHE.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Bin Yang,Jia Liu,Xin Liu,Shiyue Niu,Liqian Niu,Xian Wang,Xinxin Liu,Shuyun Bi
Acetamiprid and pymetrozine are effective pyridine insecticides used to kill aphids and whiteflies in agricultural products such as fruits, vegetables and rice, whose residues pose a serious threat to human health. Herein, the silver nanoparticles (AgNPs) modified by β -cyclodextrin ( β -CD) and nano-CuO (named as β -CD/CuO@AgNPs) were synthesized and it was used as surface-enhanced Raman spectroscopy (SERS) substrate to determine acetamiprid and pymetrozine. Among four SERS substrates such as AgNPs, β -CD/AgNPs, CuO@AgNPs and β -CD/CuO@AgNPs, β -CD/CuO@AgNPs exhibited the most substantial enhancement of the Raman signals for acetamiprid and pymetrozine, with the enhancement factors (EFs) of 2.16 × 10 6 and 3.86 × 10 6 , respectively. The XRD, TGA, TEM, HAADF-STEM, UV–vis and FT-IR were used to characterize β -CD/CuO@AgNPs and the combination of the substrate with acetamiprid/pymetrozine. Single factor experiment and response surface method were used to optimize pH, dosage of coagulant and nanosubstrate and mixing time. The influences of various interfering substances on the detection system were studied. The excellent linear relationships were respectively established for acetamiprid and pymetrozine in the range of 6.67 × 10 −9 –6.67 × 10 −7 and 1.00 × 10 −8 –1.00 × 10 −6 mol L −1 , with the limits of detection (LODs) were 0.36 and 0.94 nmol L −1 (S/N = 3). This project was successfully used for the detection of acetamiprid and pymetrozine in apple, pear and peach samples. The recoveries in the fruit samples were in the range of 95.5 %–105.0 %.
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危险品化学品经营许可证（带存储）