Current Analytical Chemistry
·
2024
·Vol. 21
·期 7
·877-883
·
IF 1.7
Yong Zhang,Qianmin Cong,Chenxu Feng,Zhengyu Cai,Lizhai Pei
BackgroundCyanide is a toxic anion and may be discarded into the water environment, which is a serious threat to human beings and the environment. Hence, it is essential to explore a facile, sensitive method for cyanide detection. Polyaniline/Cu-vanadate nanobelts serve as electrode materials for sensitive cyanide determination.MethodsPolyaniline/Cu-vanadate nanobelts were obtained by a simple route using polyaniline, Cu-vanadate nanobelts. The polyaniline/Cu-vanadate nanobelts were measured via electron microscopy, diffraction, infrared spectrum, and electrochemical methods.ResultsAmorphous polyaniline nanoparticles with a particle size of about 100 nm were attached firmly to the surface of Cu-vanadate nanobelts. Electrochemical sensing properties for cyanide detection were analyzed using a cyclic voltammetry technique using the nanobelts-modified electrode. The cyclic voltammograms (CV) peaks centered at +0.64 V and +0.54 V were observed using the polyaniline/Cu-vanadate nanobelts in 0.1 M KCl solution with 2 mM cyanide. The proposed composite nanobelt-modified electrode possessed the detection range and detection limit of 0.001-2 mM and 0.22 μM, respectively.ConclusionPolyaniline greatly enhances the electro-catalytic performance of the Cu-vanadate nanobelt-modified electrode for cyanide detection.
研究领域:
分析化学
·
环境监测
·
电化学传感器
·
纳米材料
·
毒物检测
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 62
·35948-35956
·
IF 3.049
Yue Pan,Weijia Zeng,Rong Hu,Bo Li,Guiling Wang,Qintang Li
Cu foil is widely used in commercial lithium ion batteries as the current collector of anode materials with excellent conductivity and stability. In this research, commercial Cu foil was chosen as the current collector and substrate for the synthesis of Cu doped flake-NiO via a traditional hydrothermal method. The effect of the ratio of Cu and the calcination temperature on the electrochemical performance of NiO was investigated. The structure and phase composition of the Cu doped flake-NiO electrode were studied through X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and inductive coupled plasma emission spectrometry (ICP). The electrochemical properties of the Cu doped flake-NiO electrode were studied through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and a galvanostatic charge–discharge cycling technique. According to the results, the Cu-doped NiO electrode, calcined at 400 °C with a molar ratio of Cu : Ni = 1 : 8, exhibited a high reversible charge capacity. The good cycling stability and rate performance indicate that the as-prepared electrode can be applied as a potential anode for lithium ion batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
·
电池技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Junnan Liu,Qiuyang Luo,Shu Xia,Xingfu Yang,Jie Lei,Qi Sun,Xiaohu Chen,Jiaojing Shao,Xiaoning Tang,Guangmin Zhou
Structuring a stable artificial coating to mitigate dendrite growth and side reactions is an effective strategy for protecting the Zn metal anode. Herein, a Cu-Ag double-layer metal coating is constructed on the Zn anode (Zn@Cu-Ag) by simple and in-situ displacement reactions. The Cu layer enhances the bond between the Ag layer and Zn substrate by acting as an intermediary, preventing the Ag coating from detachment. Concurrently, the Ag layer serves to improve the corrosion resistance of Cu metal. During plating, the initial Cu sheets and Ag particles on the surface of Zn@Cu-Ag electrode gradually transform into a flat and smooth layer, resulting in the formation of AgZn, AgZn 3 , and (Ag, Cu)Zn 4 alloys. Alloys play a multifunctional role in inhibiting dendrite growth and side reactions due to decreased resistance, low nucleation barrier, enhanced zincophilicity, and strong corrosion resistance. Consequently, the Zn@Cu-Ag symmetric cell exhibits continuous stable performance for 3750 h at 1 mA cm −2 . Furthermore, the Zn@Cu-Ag||Zn 3 V 3 O 8 full cell achieves an initial capacity of 293.4 mAh g −1 and realizes long cycling stability over 1200 cycles. This work provides new insight into the engineering of an efficient artificial interface for highly stable and reversible Zn metal anodes.
研究领域:
材料科学
·
电化学
·
储能
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 6
·2137-2143
·
IF 6.4
Jingshan Hou,Jianghua Wu,Zhiyu Qin,Yongzheng Fang,Leijun Shen,Xin Qiao,Langping Dong,Ganghua Zhang,Yufeng Liu,Guoying Zhao,Haijie Chen
Low-dimensional metal halides have attracted extensive attention because of their superior optoelectronic properties, high stability and structural diversity. In this work, we report a two-dimensional (2D) lead-free halide Cs2MnCl4:Cu+ as a new phosphor for white light-emitting diodes (LEDs). By doping copper(I) into manganese(II) sites, a strong green emission with a photoluminescence quantum yield (PLQY) of 70% was observed. The luminescence center was located at 530 nm and the optimal excitation wavelength was determined to be 310 nm, which suggests a large Stokes shift of 220 nm. Steady-state and transient fluorescence spectra show a decay time of 114.19 μs, indicating a self-trapped exciton (STE) emission mechanism which was further confirmed by temperature-dependent steady-state photoluminescence spectroscopy. This work suggests that manganese halides could be considered as a new family with high luminescence efficiency for optoelectronic applications.
研究领域:
材料科学
·
光电子学
·
发光材料
·
固态物理
·
半导体器件
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-9
·
IF 2.8
liu Yulei,Qi Haichao,Liu Changfeng,Li Chao,Zhao Xinke,Hou Jingbin,Li Liangbin
Electroless plating is a promising method to achieve material surface metallization, low rupture work of plated coating and complex production processes have become important factors that restrict its progress. In this study, a facile method combined with primer modification (mixture of SiO 2 particle and resin) and electroless deposition to fabricate a high-adhesion Cu-plated coating is demonstrated. Results showed that poly(ethylene terephthalate) (PET) modified with primer could absorb Ag + through the coordination effect because hydrophilic groups (–OH and –NH 2 ) were possibly used as a bridge for chemisorbing of rare metal ions (Ag + ) through ion exchange, which acted as a catalyst for the deposition of Cu coating on its surface. More importantly, introducing SiO 2 particles in the primer can improve surface roughness, which is enhanced from 0.643 to 0.829 μm of modified coating, result in the improvement of substrate/deposited coating contact area, which would facilitate the enhancement of the adhesion behavior of plated coating. The deposition of bead-like structure Cu coating on primer-modified PET surface with a higher average roughness value possessed excellent electrical property, adhesion and crystallization. The resistivity of the copper patterns is approximately 9.81 × 10 −6 Ω·cm. It is promising to integrate this kind of metal material with excellent performance in future flexible devices.
研究领域:
表面工程
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材料科学
·
电化学
·
纳米技术
·
高分子科学
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2023
·Vol. 49
·期 9
·3933-3950
·
IF 3.3
Li Xiaojun,Xia Yudong,Xu Yangzhou,Li Haitao,Huang Jiangchao,Yao Jie,Zhao Heng,Gao Xinhua,Yu Jinghao,Guo Lisheng,Li Jie
Thermocatalytic conversion of redundant CO 2 to useful methanol is an attractive route to address both energy and environmental crises simultaneously. However, existing copper/oxide catalysts widely used in these thermocatalytic processes still suffer from low methanol yield under mild reaction conditions. In this work, we design inverse oxide/Cu catalysts to achieve superior thermal catalytic performance for CO 2 hydrogenation. The optimized ZnO/Cu-1.0 catalyst exhibits maximum CH 3 OH selectivity of 83.4% and space–time yield (STY) of \(170.9\;{\text{g}}_{{{\text{CH}}_{3} {\text{OH}}}} \;{\text{kg}}_{{{\text{cat}}}}^{ - 1} \;{\text{h}}^{ - 1}\) in CO 2 hydrogenation at 210 °C, nearly twofold higher STY than the previous optimal inverse ZnO/Cu catalysts ( \(89.6\;{\text{g}}_{{{\text{CH}}_{3} {\text{OH}}}} \;{\text{kg}}_{{{\text{cat}}}}^{ - 1} \;{\text{h}}^{ - 1}\) at 250 °C). Importantly, ZnO/Cu-1.0 catalyst displayed not only a satisfactory catalytic stability but also a superior CH 3 OH STY with a time-on-stream of 24 h. Such inverse configuration of catalysts will pave the way for new strategies to design high-performance thermocatalytic catalysts and promote their commercialization. Graphical abstract Typical inverse ZnO/Cu-1.0 catalysts have been demonstrated and achieved to significantly facilitate the activation of inert CO 2 molecules to produce methanol, due to its special physicochemical properties and strong ZnO–Cu interaction
研究领域:
催化
·
化学工程
·
材料科学
·
环境科学
·
能量转换
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 9
·6439-6455
·
IF 3.5
Liangliang Tang,Dongxu Yao,Yongfeng Xia,Jun Zhao,Ming Zhu,Yu-Ping Zeng
Complex liquid–solid reactions occur during brazing. A deep understanding of brazing liquid evolution is therefore of important concern for the bonding between filler and substrates. The joining of gas-pressure-sintered silicon nitride (Si 3 N 4 ) ceramic to oxygen-free copper (OFC) foil was prepared using Ag–Cu–TiH 2 filler at 875°C for 0.5 h. The effect of the Ag:Cu ratio on the interfacial microstructure and peeling strength of the joints was analyzed. The reaction of brazing liquid with Si 3 N 4 ceramic includes reactions with both the β-Si 3 N 4 and the grain boundary phases (Y–Si–Mg–O–N). The resulting interfacial reaction products include TiN, Ti 5 Si 3 , and potential Cu 3 Ti 3 O. Based on the phase composition and three-dimensional morphology of the interfacial reaction products in the Si 3 N 4 ceramic/OFC foil joints, a model for the evolution of the brazing liquid as the reaction proceeds was proposed. Peeling test results indicated that the peeling strength of the joints rises unilaterally with the increase of the Ag:Cu ratio in the filler until reaching the peak value of 24.3 N/mm at the maximum Ag:Cu ratio of 90:10. The mechanisms of the joint peeling fracture were discussed in detail.
研究领域:
材料科学
·
冶金学
·
陶瓷学
·
连接技术
·
表面工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yunzhe Ding,Ying Yan,Hanwen Wang,Xinkui Wang,Tao Hu,Shengyang Tao,Guangtao Li
Diffusion is one of the most critical factors which affect the performance of porous catalysts in heterogeneous reactions. Hollow spheres with a hierarchical structure could significantly improve the mass transfer in the spherical catalyst. Therefore, preparation of such kind of microspheres is an important work in the field of inorganic synthesis. Herein, we combine microfluidic technology and electroless deposition to prepare hollow Cu and CuOx microspheres with a hierarchically porous structure. These microspheres have a controllable diameter (100–500 μm) and shell thickness (10–60 μm). Numerical simulation and experimental results indicate that the hollow structure is beneficial for the diffusion and utilization of the catalyst in heterogeneous reactions. The Cu and CuOx microspheres were used to catalyze the hydrogenation and Fenton-like reactions in a flow reactor, respectively. The conversion of all reactants can reach more than 95%, and catalysts can maintain their reactivity in long reaction times. Thus, the strategy in the present research should apply in the construction of other porous catalysts with high performance.
研究领域:
无机化学
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Xiuli Li,Yuan Tan,Zongyang Liu,Juan Su,Yan Xiao,Botao Qiao,Yunjie Ding
Chemoselective hydrogenation of aromatic nitro compounds to the corresponding anilines is an environmentally benign technology for the production of key intermediates in manufacturing of pharmaceuticals, agrochemicals, dyes and fine chemicals. Non-noble metal Cu-based catalysts have been reported as a low-cost alternative but suffer from poor activity. Herein, by fabricating nickel oxide promoted Cu catalysts, a promoted activity was obtained in supported Cu-Ni bimetal catalyst system. Characterizations such as H 2 -TPR and XPS indicate a strong interaction between Cu and Ni, which contributes to its high activity and selectivity in hydrogenation of p -chloronitrobenzene ( p -CNB) to p -chloroaniline ( p -CAN). Control experiments suggest that either monometallic copper or pure nickel oxide is less active for the reaction but the interaction of NiO x with Cu generates much more active species, resulting in significantly improved catalytic reactivity and selectivity. The activity was found to be highly dependent on the contents of Cu 0 & Cu + in Cu-Ni bimetal catalyst, as the specific reaction rates for hydrogenation of p -CNB grew linearly with the increment of Cu 0 & Cu + loadings. Kinetic studies and in-situ DRIFTS of p -CNB imply the 10Cu-5Ni/AlSBA-R catalyst possesses good capacity for the activation of hydrogen and nitro group, leading to high p -CNB conversion and p -CAN production. The present work provides a good example for understanding the interaction between Cu and nickel oxides, and helps to develop highly efficient non-noble metal catalysts for selective hydrogenation of aromatic nitro compounds to corresponding anilines.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Jiangyuan Qiu,Ruxin Liu,Tao Yu,Wenxuan Li,Lingyuan Wu,Weiming Zhong,Ting Wan,Rui Guo,Zaiyin Huang,Xuanwen Liu
This study addresses the technical challenges of traditional processes for precious metal recovery from electronic waste, including high energy consumption, severe pollution, and the use of highly corrosive reagents. We innovatively propose a green recovery strategy based on piezoelectric catalysis. By combining the compositional characteristics of electronic waste (Cu > 80 wt%, Au 0.1–0.5 wt%) with the hard-soft acid-base (HSAB) theory, we developed a BOC-NH₄Cl-CH₃CN-H₂O catalytic system. This system achieves efficient dissolution of copper and gold (1334 mg h −1 ·g-cat −1 and 2.7 mg h −1 ·g-cat −1 , respectively) through an oxidation-coordination mechanism, with dissolution rates reaching 99.8% and 95.5% in simulated systems and enrichment purity exceeding 99%. Based on the experimental data, it is proposed that under piezocatalysis, acetonitrile is oxidized to acetamide, which then synergistically coordinates with NH₃/Cl − to form stable coordination products (with binding energies of E_Cu = −4.034 eV and E_Au = −2.993 eV, respectively). This process may serve as a key mechanism responsible for the significant enhancement of metal dissolution. Due to the lower oxidation potential of Cu ( E° = 0.34 V) compared to Au ( E° = 1.5 V), the system exhibits a “high‑copper, low-gold” selective dissolution characteristic that aligns well with waste composition. This technology provides an efficient and environmentally friendly solution for metal recovery from electronic waste.
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Leliang Wu,Dunyu Sun,Chenyu Yan,Longjiong Chen,Dequan Zhang,Chengdu Qi,Shaogui Yang,Huan He
Stable copper-ethylenediaminetetraacetic acid (Cu-EDTA) poses significant challenges for simultaneous ligand degradation and metal recovery. A self-driven ultraviolet/periodate (UV/PI) process that enables efficient decomplexation of Cu-EDTA coupled with in situ copper recovery was developed. This process achieved 94.50% decomplexation and 68.94% copper recovery via precipitation within 90 min without pH adjustment. Mechanistic investigations revealed that the UV/PI process generates reactive iodine species (IO3•) and singlet oxygen (1O2), and Cu(I)/Cu(II)/Cu(III) redox cycling, driving stepwise decarboxylation of EDTA and Cu2+ release. Consequently, proton consumption during PI activation and IO3– formation induces a gradual pH increase to ∼7.5, triggering the precipitation of released Cu2+. This intrinsic coupling of oxidative decomplexation and pH-driven precipitation enables a self-sustained pathway for simultaneous ligand removal and Cu recovery. While the electrical energy per order (EEO) is comparable to that of UV/H2O2, the UV/PI process exhibits markedly lower energy consumption per mass of copper recovered than other UV/oxidant processes. Moreover, the UV/PI process further exhibits strong resistance to water matrix interference, effective performance in real electroplating wastewater, and broad applicability toward various heavy metal complexes. This study provides a mechanistically informed and environmentally benign strategy for the treatment of metal-EDTA-containing wastewater.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Kai Liu,Yeming He,Jiaxin Wei,Feiyang Wen,Dongxia Zhang,Zemin He,Jianxin Guo,Zhiyuan Liang,Jianjing Gao
Controllable synthesis of rough-surfaced metal nanostructures remains a critical challenge in surface materials science, as surface roughness directly determines the plasmonic, catalytic and sensing properties of nanomaterials. Herein, we report a facile lattice mismatch-directed island growth strategy for fabricating roughened Ag-Cu heterostructured triangular nanoframes with naturally roughened surfaces, using Cu nanoplates as dual-functional sacrificial templates. The intrinsic lattice mismatch between face-centered cubic Ag and Cu drives the preferential island-like nucleation of Ag atoms on the high-energy edges of Cu nanoplates, avoiding the formation of a continuous epitaxial layer. This unique growth mode generates nanoframes with abundant surface defects and dense plasmonic hot spots, while the residual Cu induces spontaneous interfacial electron transfer to form an electron-rich Ag surface. The as-prepared nanoframes exhibit 13.5-fold higher SERS activity than smooth monometallic Ag nanoplates, and show excellent performance in both aqueous dispersion and solid substrate configurations. This work provides a general and scalable approach for regulating the surface microstructure of template-derived nanostructures through lattice mismatch engineering.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）