RSC Advances
·
2019
·Vol. 9
·期 23
·13065-13076
·
IF 3.049
Yuzhe Zhang,Tingting Bian,Da Xia,Dandan Wang,Yi Zhang,Xudong Zheng,Zhongyu Li
Although bio-materials are widely used for the adsorption of heavy metal ions, they have low specific surface area, slow adsorption rates, and poor selectivity. To overcome these limitations, in this study, we report a 3D-ordered macroporous ion-imprinted chitosan film (3DOM-IICF); the 3DOM-IICF coupled with a colloidal crystal template and ion imprinting (IIP) technology has been used to absorb copper ions (Cu(II)) present in water. Moreover, polystyrene (PS) micro-spheres and copper templates were added to form a three-dimensional ordered macroporous structure and ion-imprinted sites, respectively. Finally, the film was formed by drying. Adsorption experiments showed the removal of Cu(II) from the 3DOM-IICF in an aqueous solution. The 3DOM-IICF exhibited good adsorption performance under neutral conditions of pH = 7.0, and the adsorption efficiency was high. The maximum adsorption capacity of the 3DOM-IICF was 261.31 mg g−1. The adsorption processes were more consistent with the pseudo-second-order kinetic model and the Langmuir isotherm. The 3DOM-IICF exhibits superior selective adsorption of Cu(II). Moreover, the 3DOM-IICF could be regenerated multiple times, reused as an adsorbent and maintained high adsorption capacity. This kind of imprinted template method has important significance in the selective adsorption of pollutants in bio-materials and is worthy of in-depth research.
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Catalysts
·
2022
·Vol. 12
·期 2
·147
·
IF 4.501
Li Cheng,Yu-Ting Zhong,Qu-Quan Wang,Li Zhou
Herein, we report an approach to prepare Cu/Cu2−xS core/shell nanorods by in situ sulfidation of copper nanorods. Firstly, copper nanorods with tunable longitudinal surface plasmon resonances were synthesized by a seed-mediated method using Au nanoparticles as seeds. A convenient in situ sulfidation method was then applied to convert the outermost layer of Cu nanorods into Cu2−xS, to increase their stability and surface activity in photocatalytic applications. The thickness of Cu2−xS layer can be adjusted by controlling the amount of S source. The Cu/Cu2−xS core/shell nanorods exhibits two characteristic surface plasmon resonances located in visible and near-infrared regions, respectively. The photocatalytic performances of Cu nanorods and their derivatives were evaluated by measuring the degradation rate of methyl orange dyes. Compared with Cu nanorods, the Cu/Cu2−xS core/shell nanorods demonstrate more than a 13.6-fold enhancement in the degradation rate at 40 min. This work suggests a new direction for constructing derivative nanostructures of copper nanorods and exploring their applications.Keywords:Cu nanorods;sulfidation;degradation
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Soft Matter
·
2021
·Vol. 17
·期 17
·4550-4558
·
IF 3.679
Zhaoyu Liu,Dong Yao,Lin Ai,Huiwen Liu,Shitong Zhang,Hao Zhang
Fluorescent Cu nanoclusters (NCs) have shown potential in lighting and display, because Cu is cheap and easily available. Despite recent successes in improving the emission intensity of Cu NCs on the basis of aggregation-induced emission enhancement and self-assembly-induced emission enhancement, the difficulty in tuning the emission color sheds the doubt for achieving high-performance white light-emitting diodes (WLEDs). In this work, halogen effects are utilized to tune the emission color of Cu nanocluster self-assembly nanosheets (NSASs). By altering the adsorbed halogens from Cl, Br to I, the emission peak of Cu NSASs is tunable from 495 to 674 nm. In this context, halogen atoms are capable of improving the charge transfer and molecular spin coupling of Cu NCs, and thereby narrow the S0T1 gap and facilitate the intersystem crossing of excitons from a singlet to triplet state. As a result, emission spectra redshift and the population of the exiton recombination via the triplet state pathway is increased, which leads to the improvement of the photoluminescence quantum yield (PLQY). By simply introducing and/or mixing different types of cuprous halides, Cu nanocluster co-assembly nanosheets (NCASs) with full-color emission are obtained. The as-prepared Cu NSASs and NCASs are further employed to fabricate monochrome and white LEDs.
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Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 30
·11966-11973
·
IF 0
Yu Zhang,Pengli Zhu,Liang Chen,Gang Li,Fengrui Zhou,Daoqiang (Daniel) Lu,Rong Sun,Feng Zhou,Ching-ping Wong
Novel hierarchical architectures of porous copper (Cu) microspheres assembled with nanoparticles have been successfully synthesized by ingeniously selecting the precursor and complexant through a facile wet chemical reduction method. The resultant porous Cu microspheres have a size distribution of 700 ± 50 nm and have excellent monodispersity. The synergistic effect between the precursor of slightly soluble copper hydroxide and the complexants of polyacrylic acid and ethanol amine exactly induces the generation of unique porous hierarchical architectures. The obtained porous Cu microspheres were applied to reduce and degrade different organic dyes with high concentrations (4-nitrophenol, methylene blue, and rhodamine B) in the presence of NaBH4. Compared with solid Cu particles that have the same size, these porous Cu microspheres exhibit more excellent catalytic activity due to their hierarchical structures. Moreover, the catalyst with universal applicability could be easily separated from the catalytic system and sustainedly possess high stability in recycled reactions.
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Nanoscale
·
2015
·Vol. 7
·期 32
·13775-13783
·
IF 7.394
Yu Zhang,Pengli Zhu,Gang Li,Wenzhao Wang,Liang Chen,Daoqiang Daniel Lu,Rong Sun,Feng Zhou,Chingping Wong
Highly stable monodispersed nano Cu hydrosols were facilely prepared by an aqueous chemical reduction method through selecting copper hydroxide (Cu(OH)2) as the copper precursor, poly(acrylic acid) (PAA) and ethanol amine (EA) as the complexing agents, and hydrazine hydrate as the reducing agent. The size of the obtained Cu colloidal nanoparticles was controlled from 0.96 to 26.26 nm by adjusting the dosage of the copper precursor. Moreover, the highly stable nano Cu hydrosols could be easily concentrated and re-dispersed in water meanwhile maintaining good dispersibility. A model catalytic reaction of reducing p-nitrophenol with NaBH4 in the presence of nano Cu hydrosols with different sizes was performed to set up the relationship between the apparent kinetic rate constant (kapp) and the particle size of Cu catalysts. The experimental results indicate that the corresponding kapp showed an obvious size-dependency. Calculations revealed that kapp was directly proportional to the surface area of Cu catalyst nanoparticles, and also proportional to the reciprocal of the particle size based on the same mass of Cu catalysts. This relationship might be a universal principle for predicting and assessing the catalytic efficiency of Cu nanoparticles. The activation energy (Ea) of this catalytic reaction when using 0.96 nm Cu hydrosol as a catalyst was calculated to be 9.37 kJ mol−1, which is considered an extremely low potential barrier. In addition, the synthesized nano Cu hydrosols showed size-dependent antibacterial activities against Pseudomonas aeruginosa (P. aeruginosa) and the minimal inhibitory concentration of the optimal sample was lower than 5.82 μg L−1.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Yu-Fang Wu,Ya-Hui Li,Zhi-Meng Sui,Yu-Kun Wei,Rui-Han Wei,Xiao Chen,Xiao-Hua Yang,Zhi-Wei Chen,Zhihong Jing,Cheng-Yang Yue
Zero-dimension (0D) zinc halides have attracted intensive attention in multiple optoelectronic fields due to their excellent stability. However, most Zn-based halides show relatively weak luminescence efficiency, which limits their further widespread applications. Herein, we successfully optimized the electronic structure of a new 0D Zn halide [MTPP]2ZnBr4 ([MTPP]Br = Methyltriphenylphosphonium bromide) by Cu+ doping strategy to realize highly efficient and adjustable dual-color emission. Compared with weak blue-green emission of undoped [MTPP]2ZnBr4, the incorporating of Cu+ ion results in a newly emerged intense orange emission at 630 nm with highest photoluminescence quantum yield (PLQY) of 39.17%. More significantly, the relative intensities of dual emission feature transformation depending on environment temperature due to thermally associated reversible energy transfer between each self-trapped excitonic (STE) state, which enables this doped phase to act as a promising luminescent ratiometric thermometer with relative thermal sensitivity of 0.94% K-1 in the range of 80-260 K. Furthermore, this phenomenon also enables the material to achieve tunable multicolor luminescence with advanced applications in anti-counterfeiting. This study not only realizes highly efficient dual-color emissions in Zn-based halide, but also achieves temperature-dependent thermochromism luminescence with wide applications in temperature monitoring and anti-counterfeiting.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Yi Zhong,Jie Li,Pei Xu,Yantao Lou,Xingchen Zhang,Haibing Ji,Yuanjie Teng
Semiconductors offer advantages as surface-enhanced Raman scattering (SERS) substrates, including high stability and low cost. However, their intrinsic plasmonic resonance is inherently weak due to bandgap limitations, where valence electrons can only be excited to the conduction band under specific conditions. Consequently, their SERS enhancement mechanism primarily relies on charge transfer processes at the material-molecule interface, resulting in enhancement factors typically 1–3 orders of magnitude lower than those of conventional noble metal substrates (e.g., Au, Ag). To address this limitation, this study proposes a semiconductor-metal heterojunction synergistic enhancement strategy. A SERS substrate was designed by constructing a core-shell heterostructure of CuS and metallic Cu (CuS@Cu), aiming to combine efficient charge transfer with strong electromagnetic field enhancement. The results demonstrate that the synthesized CuS@Cu core-shell heterojunction exhibits significantly enhanced Raman activity. The optimization of SERS performance were systematically investigated by tuning precursor concentrations (e.g., CuS colloidal concentration, CuSO₄ concentration). Utilizing a liquid-liquid interfacial self-assembly technique, with n-butyl acetate as the oil phase and an aqueous colloidal dispersion of CuS@Cu nanoparticles as the aqueous phase, large-area, ordered CuS@Cu core-shell heterojunction films were fabricated. Leveraging a selective interfacial CT mechanism between the CuS semiconductor and probe molecules (e.g., Rhodamine B (RhB), Methylene Blue (MB), Malachite Green (MG)), this substrate enables specific enhancement of their SERS signals (EF ∼ 10 5 for RhB). Quantitative limits of detection reached 1 × 10 −7 mol/L, 3.16 × 10 −7 mol/L, and 3.16 × 10 −6 mol/L for RhB, MB, and MG, respectively. Also, the substrate exhibits high reproducibility and homogeneous SERS response (RSD < 4.5 %), ensuring reliable and robust sensing performance. The combination of the controllable liquid-liquid interfacial self-assembly and the heterojunction enhancement effect highlights the significant potential of this substrate for application in portable SERS sensing devices.
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Materials Today Communications
·
2025
·
IF 4.5
Jiamu Li,Xin Ban,Aijia Sun,Han Lai,Huayi Li,Zhengchun Yang,Peng Pan,Jie He,Rui Zhang
This study presents a highly sensitive and cost-effective non-enzymatic glucose sensor based on coral-like Cu/nickel foam bimetallic electrodes. Nickel foam was utilized as a substrate for electrochemical deposition of Cu nanoparticles. Comprehensive analyses using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) confirmed the formation of coral-like Cu/nickel foam bimetallic structure, significantly enhancing the active sites for glucose oxidation. Electrochemical characterization shows that the electrode has excellent sensitivity for glucose detection. The detection sensitivity of cyclic voltammetry (CV) for 10–100 μM glucose can reach 16,826 μA cm −2 mM −1 , and the detection sensitivity of chronoamperometry (CA) for 0–100 μM glucose is 14,828 μA cm −2 mM −1 . The detection limit is as low as 0.04 μM. The sensor exhibited outstanding selectivity against common interfering substances and maintained high stability in artificial sweat for over a week. Considering the typical glucose levels in human sweat (∼50 μM), this sensor holds significant potential for non-invasive blood glucose monitoring applications.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zihan Liu,Yao Xu,Yuxin Heng,Fanghua Liu,Chao Tan,Guijiao Wen,Fujian Xu,Juan He,Ke Huang,Xiaoli Xiong,Xue Jiang
In this paper, a wearable flexible patch featuring a non-enzymatic electrochemical sensor based on Cu single-atom catalysts (SACs) anchored on bipyridine-covalent organic framework (COF) electrode was proposed for specific detection of acetaminophen (AP) in human sweat. The electrode modified material is Cu single atom catalytic material (Cu-TpBpy). The bifunctional TpBpy acts as a support for binding individual Cu atoms through abundant and well-organized N-N chelating sites, while simultaneously serving as an active host for specific recognition/adsorption of AP due to its porous structure and active N sites. The resulting Cu-TpBpy with atomically dispersed Cu sites demonstrated high electrochemical activity for AP, attributed to enhanced electron transfer efficiency and reduced binding and adsorption energies. Density functional theory calculations further reveal that the Cu single-atom anchoring on TpBpy provides superior adsorption of AP than TpBpy alone, resulting in lower binding energy, and higher selectivity and sensitivity. The wearable flexible patch, based on Cu-TpBpy, enabled real-time and accurate detection of AP in human sweat and achieved a linear range of 0.3 µM-5 µM and a limit of detection of 13 nM, with satisfied stability and repeatability. This work developed a highly sensitive non-enzymatic sensing method for wearable flexible patches.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Li Hefei,Wei Pengfei,Liu Tianfu,Li Mingrun,Wang Chao,Li Rongtan,Ye Jinyu,Zhou Zhi-You,Sun Shi-Gang,Fu Qiang,Gao Dunfeng,Wang Guoxiong,Bao Xinhe
Producing valuable chemicals like ethylene via catalytic carbon monoxide conversion is an important nonpetroleum route. Here we demonstrate an electrochemical route for highly efficient synthesis of multicarbon (C 2+ ) chemicals from CO. We achieve a C 2+ partial current density as high as 4.35 ± 0.07 A cm −2 at a low cell voltage of 2.78 ± 0.01 V over a grain boundary-rich Cu nanoparticle catalyst in an alkaline membrane electrode assembly (MEA) electrolyzer, with a C 2+ Faradaic efficiency of 87 ± 1% and a CO conversion of 85 ± 3%. Operando Raman spectroscopy and density functional theory calculations reveal that the grain boundaries of Cu nanoparticles facilitate CO adsorption and C − C coupling, thus rationalizing a qualitative trend between C 2+ production and grain boundary density. A scale-up demonstration using an electrolyzer stack with five 100 cm 2 MEAs achieves high C 2+ and ethylene formation rates of 118.9 mmol min −1 and 1.2 L min −1 , respectively, at a total current of 400 A (4 A cm −2 ) with a C 2+ Faradaic efficiency of 64%.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xia Wei,Yuhan Zhou,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is essential for direct hydrazine fuel cells and offers a promising alternative to the kinetically sluggish oxygen evolution reaction in water splitting. In this work, we present the design and synthesis of a novel Ni-Zn-Cu catalyst with a three-dimensional (3D) interconnected hollow network structure for HzOR. This unique 3D hollow architecture, comprising Ni-Zn-Cu nanosheets, significantly enhances HzOR catalytic performance by increasing the number of accessible active sites and improving both mass and charge transport. Additionally, the incorporation of multifold nanotwins within the catalyst induces lattice strain and reduces coordination numbers, optimizing the electronic structure and d -band center to strengthen hydrazine adsorption and catalyst reactivity. The Ni-Zn-Cu catalyst exhibits remarkable HzOR performance, achieving a current density of 200 mA·cm −2 , and a mass activity of 10,129 A·g −1 at −0.05 V vs. RHE, and a low onset potential of −0.15 V vs. RHE. Furthermore, it retains 96 % of its initial activity after 20 h of continuous electrolysis. This work marks a significant advancement in the development of highly efficient and durable HzOR catalyst.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Jian Wang,Yueyang Xu,Erjian Huang,Liming Kong,Jie Li,Yongping Zeng
The combustion of thiophene sulfides in fuel leads to the release of sulfur oxides (SO x ), which pose significant threats to both ecological systems and human health. Adsorption desulfurization has gained considerable attention from researchers due to its mild operating conditions, low production costs, and minimal impact on octane number. This study investigates the use of Cu-BTC as a platform for developing a novel adsorbent aimed at efficiently removing thiophenic compounds from fuel. Aluminum atoms were incorporated into the framework of Cu-BTC to create micro/mesoporous Al/Cu-BTC. Subsequently, the π-complexation adsorbent Al/Cu(I)-BTC, featuring Lewis acid sites, was synthesized through the in-situ reduction of Al/Cu-BTC using sodium thiosulfate. The adsorption properties of Al/Cu(I)-BTC for thiophene were assessed through both batch and breakthrough experiments. Al/Cu(I)-BTC-0.10(0.28) demonstrated exceptional adsorption performance. The static and dynamic adsorption capacities of thiophene at 500 and 200 ppm were 18.54 mg S/g and 9.49 mg S/g, respectively. Importantly, the adsorption capacity of Al/Cu(I)-BTC-0.10 (0.28) for thiophene in fuel containing 500 ppm sulfur remained at 15.45 mg S/g after six regeneration cycles. In the competitive adsorption of toluene, the adsorption capacity of the adsorbent for thiophene in the fuel containing 200 ppm sulfur was 7.84 mg S/g.
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