ENERGY & FUELS
·
2018
·
IF 3.024
Shaobo Liu,Bo Zhang,Zhanqi Bai,Feifan Chen,Fang Xie,Jinbing Zhou,Yongkang Lu,Guangwu Miao,Jiamin Jin,Zekai Zhang
Cu2O-SiO2 composite aerogel-like adsorbents with different n(Si/Cu) were synthesized by a sol–gel method, followed by drying under atmospheric pressure, and characterized by BET, XRD, SEM, H2-TPR, XRF, and FTIR means. Their adsorption performance for thiophene and benzothiophene in model fuels was investigated with equilibrium and breakthrough adsorption experiments, respectively. The results showed that Cu2O-SiO2 composite aerogel-like adsorbents exhibited an excellent desulfurization performance based on π-complexation between Cu(I) and thiophenics. The n(Si/Cu) of Cu2O-SiO2 had an obvious effect on their physical properties and consequently desulfurization performance. The BET surface area, pore size, and pore volume decreased with the decrease of n(Si/Cu) (increase of Cu content). Only a part of Cu was incorporated into the materials. The more the Cu(I) and the higher the specific surface area, the larger the adsorption capacity was. Cu2O-SiO2-50 performed the best, and breakthrough adsorption capacities for benzothiophene and thiophene were 5.78 mg S/gads (0.90 mmol-S/mmol-Cu) and 4.76 mg S/gads (0.74 mmol-S/mmol-Cu), respectively. The adsorption data can be well fitted by both the Langmuir and Freundlich adsorption isotherms. The effect of competitive adsorption of olefins or aromatics on the desulfurization performance of adsorbents was obviously weaker compared with the result in the literature. The spent Cu2O-SiO2 adsorbents can be well regenerated by benzene–n-heptane washing. The breakthrough adsorption capacity of thiophene on the first regenerated Cu2O-SiO2-50 was 71% of that on fresh adsorbent.
研究领域:
材料科学
·
能源与燃料化学
✓ 已验证
DOI
高影响因子
MEASUREMENT
·
2025
·
IF 5.6
Wenbin Ren,Jinfeng Luan,Liang Yin,Runjia Xu,Changchun Wang,Pinhua Zhang,Guangliang Cui,Kesong Yang
Nitrogen dioxide (NO 2 ) gas detection is crucial for environmental monitoring and pollution control. Here we report an ultrasensitive room-temperature NO 2 gas sensor based on graphene-modified Cu 2 O nanocomposite using a simple hydrothermal method. Gas sensing tests of the composites with different graphene contents reveal that those modified with 0.4 wt% graphene (0.4G-Cu 2 O) demonstrate the best performance, showing three times higher sensitivity than that of pure Cu 2 O. Additionally, 0.4G-Cu 2 O exhibits significantly reduced response and recovery times of 20 s and 65 s, respectively, which are notably shorter than those of many other sensing materials. These advantages were attributed to the unique nanostructure formed by graphene and Cu 2 O, where graphene enhanced the gas adsorption sites on the material surface and improved its conductivity. A combined experimental and first-principles study further elucidated the mechanisms behind the improved performance, highlighting the synergistic effects of graphene modification.
研究领域:
材料科学
·
环境科学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hui Zhao,Yang Yang,Jing An,Huilong Xin,Yinan Xiao,Zhaojun Jia,Yuandong Wu,Liyuan Sheng,Min Wen
Wound-associated infections represent an arduous global healthcare challenge, especially in the “post-antibiotic” era, necessitating the development of advanced antimicrobial dressing materials that simultaneously dictate the use of rapid yet effective disinfection, low drug resistance and side effects, and the potency to foster tissue healing. Nanoantimicrobial-armored nanostructured functional dressing systems have piqued extensive interest to satisfy these criteria. Herein, fusing electrospinning nanotechnology and an emerging photo–chemo synergistic sterilization paradigm, a smart “all-in-one” multifunctional wound-managing dressing platform was constructed, through incorporating photochemically active nanocrystalline cuprous oxide (Cu2O) into modified polycaprolactone (mPCL) electrospun fibrous mats. The resulting materials were systematically characterized pertaining to physiochemical analysis, photoabsorption and photocurrent measurements, and photocatalytic reactive oxygen species (ROS) generation. The capability of this nanoplatform to elicit rapid, photoactivated, catalytically augmented bacterial disinfection was corroborated, displaying ∼99–100% broad-spectrum antibacterial efficacies against Staphylococcus aureus and Escherichia coli in 25 min. Benefiting from the release of Cu2+, mPCL-Cu2O impairs bacterial contamination even under dark conditions. Furthermore, these materials also exhibited favorable in vitro/-ovo biocompatibility toward NIH3T3 fibroblasts, red blood cells, and chick chorioallantoic membrane, alongside appreciable pro-healing capacity in bridging scratch-based wounds, which could be attributed to nanofiber-afforded biomimetic topography and controllable liberation of micronutrient Cu ions. This study provides insights into the design and fabrication of simple yet smart antibacterial nanoplatforms for biomedical applications.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
伤口愈合
·
抗菌技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Laidi Xu,Jieming Dong,Yong Kong,Zheng-Zhi Yin,Feifei Mu
A molecularly imprinted sensor is smartly designed by using Cu 2 O as the core and SiO 2 as the imprinting layer, which can be used for the detection of doxycycline (Dox). As a peroxidase mimic, Cu 2 O can catalyze colorless o -phenylenediamine (oPD) to yellow 2,3-diaminophenazine (DAP), however, the peroxidase-like activity of the Cu 2 O core is shielded after Dox is rebound to the molecularly imprinted SiO 2 (MI-SiO 2 ). As the absorbance of DAP at 416 nm ( A 416 ) is linearly related to the concentration of Dox, spectroscopic detection of Dox can be achieved. The linear range is 0.1–10 μM, and the limit of detection (LOD) is 0.046 μM. In addition, a multicolor sensing strategy is also proposed by using the smartphone-based color recognition software. The ratio of green (G) value to blue (B) value is linearly related to the concentration of Dox, and thus colorimetric detection of Dox is achieved by the RGB color analysis. The linear range is 0.1–10 μM, and the LOD is 0.074 μM. Finally, dual-mode detection of Dox in lake water and honey is achieved with the developed molecularly imprinted sensor.
研究领域:
分析化学
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环境监测
·
食品安全
·
生物传感器
·
分子识别
·
药物残留检测
·
纳米材料应用
✓ 已验证
产品关联
DOI
高影响因子
STAR Protocols
·
2022
·
IF 0
Haiqiang Luo,Bo Li,Jian-Gong Ma,Peng Cheng
Summary The morphology of nano-Cu 2 O profoundly determines its catalytic performance. Here, we provide two universal and reliable techniques to modify the surface of nano-Cu 2 O. First, we detail steps for the systematic tuning of the exposed facets of nano-Cu 2 O ranging from low index to high index using reductant-controlled technique in the presence of sodium dodecyl sulfate. Second, we describe steps for facet-directed precipitation in which the morphology-dependent ZIF-8 (a type of zeolitic imidazolate frameworks) shells on different nano-Cu 2 O are well introduced. For complete details on the use and execution of this protocol, please refer to Luo et al. (2022) .
研究领域:
材料科学
·
纳米技术
·
催化
✓ 已验证
DOI
PubMed
Frontiers of Environmental Science & Engineering
·
2020
·Vol. 14
·期 6
·1-12
·
IF 4.053
Li Wenyue,Chen Min,Zhong Zhaoxiang,Zhou Ming,Xing Weihong
High-concentration industrial wastewater containing N,N -dimethylacetamide (DMAc) from polymeric membrane manufacturer was degraded in Cu 2 O NPs/H 2 O 2 Fenton process. In the membrane-assisted Fenton process DMAc removal rate was up to 98% with 120 min which was increased by 23% over the batch reactor. It was found that ·OH quench time was extended by 20 min and the maximum ·OH productivity was notably88.7% higher at 40 min. The degradation reaction rate constant was enhanced by 2.2 times with membrane dispersion ( k = 0.0349 min −1 ). DMAc initial concentration ( C 0 ) and H 2 O 2 flux ( J p ) had major influence on mass transfer and kinetics, meanwhile, membrane pore size ( r p ) and length ( L m ) also affected the reaction rate. The intensified radical yield, fast mass transfer and nanoparticles high activity all contributed to improve pollutant degradation efficiency. Time-resolved DMAc degradation pathway was analyzed as hydroxylation, demethylation and oxidation leading to the final products of CO 2 , H 2 O and NO 3 − (rather than NH 3 from biodegradation). Continuous process was operated in the dual-membrane configuration with in situ reaction and separation. After five cycling tests, DMAc removal was all above 95% for the initial [DMAc] 0 = 14,000 mg/L in wastewater and stability of the catalyst and the membrane maintained well.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Haofeng Xiao,Shuxue Zhou
Combining with various antibacterial mechanisms is the preferred strategy to fabricate coatings with effective antibacterial performance. Herein, Cu 2 O nanoparticles and dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride, a kind of quaternary ammonium salt (QAS), were simultaneously incorporated into a moisture-curable acrylic resin in order to achieve both contact-killing and release-killing abilities for antibacterial coatings. The surface morphology, surface composition and basic properties of the coatings were thoroughly characterized. The antibacterial performance of the coatings was determined by in-vitro bacteriostatic test. Under the constant total mass fraction of antibacterial agents, both Cu 2 O and QAS content possessed the highest value on the coating surface at Cu 2 O/QAS mass ratio of 1:1, and correspondingly, the coatings reached sterilizing rate above 99 % against both E. coli and S. loihica , indicating the existence of synergistic effect between Cu 2 O and QAS. The synergistic antibacterial mechanism of the coatings involved two aspects. Firstly, the combination of contact-killing and release-killing biocides resulted in high bactericidal and antibiofilm activity against different bacteria. Further, the grafting of QAS molecules on the surface of Cu 2 O particles brought about the spontaneous migration of nanoparticles to the coating surface. The interaction between Cu 2 O and QAS also inhibited the phase separation of QAS and prolonged the release of Cu 2+ at the same time. The coatings, therefore, exhibited stable antibacterial performance at varied service conditions.
研究领域:
材料科学
·
微生物学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 45
·15836-15847
·
IF 4.029
Liguang Dou,Yanna Wang,Yangguang Li,Hui Zhang
A series of novel hierarchical nanocomposite catalysts xCu@Cu2O/MgAlO-rGO were fabricated by calcination of CuxMg3−xAl-LDH/rGO precursors (LDH: layered double hydroxide, rGO: reduced graphene oxide, and x = 0.5, 1.0, and 1.5), obtained by a facile citric acid-assisted coprecipitation route, under a N2 flow upon in situ self-reduction of lattice atomic-dispersed Cu2+ by rGO. Systematic characterization reveals highly dispersed core–shell-like Cu@Cu2O nanoparticles near the border between vertically interconnected mixed oxide MgAlO nanoplates and rGO layers. All the obtained catalysts show extraordinary catalytic performances for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) at room temperature. The 1.0Cu@Cu2O/MgAlO-rGO shows the highest activity for complete conversion of 4-NP with an apparent rate constant (kapp) of 55.3 × 10−3 s−1, a normalized rate constant (knor) of 14 497 s−1 g−1 on an active Cu content, and an unprecedented recycling stability for 25 successive cycles, which are superior to those of the recently reported Cu- and Co-based metal nanoparticles and even compared favourably with those of the most active noble metal catalysts. The superior activity of 1.0Cu@Cu2O/MgAlO-rGO can be attributed to the highly dispersed core–shell-like Cu@Cu2O nanoparticles and the greatly enhanced four-phase synergistic effect among Cu, Cu2O, MgAlO and rGO upon calcination. Moreover, 1.0Cu@Cu2O/MgAlO-rGO shows an excellent efficiency in the fixed bed system for the treatment of simulated industrial effluents containing nitrophenols and organic dyes. The present cost-effective, highly efficient and reusable non-noble metal nanocatalyst would open a new pathway for future water remediation.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Hongqiang Shen,Jixiang Wang,Jinhui Jiang,Bifu Luo,Baodong Mao,Weidong Shi
A series of RGO-Cu 2 O/Bi 2 O 3 composite photocatalysts was developed by depositing Cu 2 O and Bi 2 O 3 nanocrystals on the surface of RGO via an in situ precipitation method. The Cu 2 O and Bi 2 O 3 nanocrystals distributed uniformly and separately on RGO, which favored the transfer of photogenerated electrons and holes towards an effective path. Compared with RGO-Cu 2 O and RGO-Bi 2 O 3 , the three-component RGO-Cu 2 O/Bi 2 O 3 composites presented a further improvement on the photodegradation of tetracycline (TC) under visible light irradiation, which can be attributed to the construction of a Z-scheme photocatalytic system where the RGO served as a solid-state medium for the transfer of the photogenerated electrons from the conduction band of Bi 2 O 3 to the valence band of Cu 2 O.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Ke Liu,Lixiang Shi,Yaxin Guo,Shiduo Hao,Yunpu Zhai,Yonggang Liu
Cu-based Fenton-like systems have demonstrated high effectiveness in the degradation of organic pollutants, however, challenges still exist to overcome the sluggish cycling of metal ions and fast activation of reactants. Herein, a novel n-p type Cu 2 (OH) 3 F/Cu 2 O photo-Fenton-like catalyst (CFC) was prepared with in-situ reduction of Cu 2 (OH) 3 F and applied for tetracycline hydrochloride degradation. Under optimized condition, the target catalyst (CFC-5) showed excellent activity, achieving a degradation efficiency of approximately 99.93 % in 30 min. The reaction rate constant with CFC-5 was 4.10 and 3.26 times higher than that of Cu 2 (OH) 3 F and Cu 2 O, respectively. Moreover, the Cu 2 (OH) 3 F/Cu 2 O catalyst exhibited highly cycling stability and broad applicability. The results illustrate that construction of Cu 2 (OH) 3 F/Cu 2 O composites facilitates the charge separation and enhances Cu 2+ /Cu + cycling, which benefits the generation of highly oxidizing active species and thus significantly improved the degradation efficiency. Besides, this study offers a versatile method to construct inexpensive and efficient photo-Fenton-like heterojunction catalysts.
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
Frontiers in Chemistry
·
2019
·
IF 3.782
Xu Lina,Li Jiao,Sun Haibin,Guo Xue,Xu Jiakun,Zhang Hua,Zhang Xiaojiao
Cu2O/CuO nanosheets in-situ grown on Cu-Carbon cloths (Cu-CCs), namely Cu2O/CuO@Cu-CCs, are constructed by a simple strategy with electroless copper plating, chemical etching, and thermal dehydration. The as-prepared material is directly used as binder-free electrodes for supercapacitors (SCs). CCs coated with Cu, as the current collector, can effectively promote the charge collection and electron transfer, while the hierarchical Cu2O/CuO nanosheets provide massive active sites for fast faradic reactions. The composite electrode exhibits high specific capacitance [1.71 F cm−2, equivalent to 835.2 F g−1, at the current density of 10 mA cm−2 (3.57 A g−1)]. The asymmetric supercapacitor device using Cu2O/CuO@Cu-CCs as the positive electrode and activated carbon as the negative electrode, achieves a superior energy density up to 60.26 Wh kg−1 at a power density of 299.73 W kg−1 and an excellent long-term cycling stability (9.65% loss of its initial capacitance after 5,000 cycles). The excellent electrochemical performance is mainly ascribed to the unique hierarchical structure of Cu2O/CuO@Cu-CCs, making it attractive as a potential electrode material for high performance SCs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chuanqi Feng,Lumin Wang,Dashuai Zhang,Longlong Geng,Lianwen Zhou,Ling Wang,Guanfeng Tian,Qi Tang,Jinyan Hu,Bijiang Geng,Lang Yan
The efficacy of electron-hole separation in a single sonosensitizer and the complexities of the tumor microenvironment (TME) present significant challenges to the effectiveness of sonodynamic therapy (SDT). Designing efficient sonosensitizers to enhance electron-hole separation and alleviate TME resistance is crucial yet challenging. Herein, we introduce a novel Z-scheme heterojunctions (HJs) sonosensitizer using Fe-doped carbon dots (CDs) as auxiliary semiconductors to sensitize cubic Cu 2 O (Fe-CDs@Cu 2 O) for the first time. Fe-CDs@Cu 2 O demonstrated enhanced SDT effects due to improved electron-hole separation. Additionally, the introduction of Fe ions in CDs synergistically enhances Fenton-like reactions with Cu ions in Cu 2 O, resulting in enhanced chemodynamic therapy (CDT) effects. Moreover, Fe-CDs@Cu 2 O exhibited rapid glutathione (GSH) depletion, effectively mitigating TME resistance. With high rates of 1 O 2 and OH generated by Fe-CDs@Cu 2 O, coupled with strong GSH depletion, single drug injection and ultrasound (US) irradiation effectively eliminate tumors. This innovative heterojunction sonosensitizer offers a promising pathway for clinical anti-tumor treatment.
研究领域:
生物医学工程
·
肿瘤治疗学
✓ 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）