ChemCatChem
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2020
·Vol. 13
·期 3
·924-933
·
IF 4.853
Jingjing Song,Fabao Zhang,Qingzhuo Hu,Wei Jiang,Dongdong Li,Bo Zhang
Graphical Dual catalysis : A dual functional CeO 2 /Cu 2 O/CuO nanocomposite was synthesized by a facile chemical method using Ce-based Ce-Al-Cu glass ribbons as a precursor. The nanocomposite can rapidly degrade azo dyes including orange II (OII), methyl orange (MO), and congo red (CR) under dark conditions with no chemical and energy input. Under visible light irradiation, the composite also showed high efficiency for the decomposition azo-free dyestuff such as methylene blue (MB) and rhodamine B (RhB). A novel dual functional CeO 2 /Cu 2 O/CuO nanocomposite was synthesized by a facile chemical method using Ce-based Ce-Al-Cu glass ribbons as a precursor. The nanocomposite can rapidly degrade azo dyes including orange II (OII), methyl orange (MO), and congo red (CR) under dark conditions with no chemical and energy input. Under visible light irradiation, the composite also showed high efficiency for the decomposition azo-free dyes such as methylene blue (MB) and rhodamine B (RhB). The excellent performances of the nanocomposite in both dark and light conditions are attributed to the synergistic effects of its composition and the nanoparticle structure that have large surface areas and contain many active sites, and to the formation of heterojunctions in the Ce/Cu Oxide. The high performance of this bi-functional catalyst made from industrially-prepared atomically homogenous amorphous metallic demonstrates the promise of high-performance catalysts based on multi-component metallic glass materials.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 37
·16475-16480
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IF 2.7
Xiaoxu Zhang,Xiangyu Cai,Yanqun Fei,Yuying Jia,Hongyan Shan,Yanfu Huan
In this article, a CRET-based chemiluminescent sensor was developed for ascorbic acid detection. Au/Pt@Cu2O/CuO NPs with peroxidase activity were prepared to catalyse the decomposition of H2O2 to produce free radicals, which led to the enhancement of the chemiluminescence (CL) signal, and the CRET between luminol and MnO2 NSs was able to take place and the CL signal was reduced; the presence of ascorbic acid would reduce MnO2 NSs, which was able to weaken the energy transfer between luminol and MnO2 NSs and restored the CL signal. Under the optimal experimental conditions, the detection range of ascorbic acid was 1–1000 μM, and the LOD was 0.35 μM. The method is sensitive and has a wide linear range, and is expected to be applied to the detection of ascorbic acid in more complex environments.
研究领域:
分析化学
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生物传感
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纳米技术
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DOI
高影响因子
Journal of the Iranian Chemical Society
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2025
·
IF 2.3
Wang Liping,Tao Xin,Ruan Yuxian,Yu Ying,Wang Zhijuan,Ming Yingchun
Photocatalytic water splitting has emerged as a pivotal strategy to tackle global energy crises and environmental degradation by producing clean hydrogen. In this study, a novel Cu 2 O/CuO/C composite photocatalyst was prepared from cupric nitrate trihydrate and 1,3,5-benzenetricarboxylic acid via the two-step solvothermal-calcination method as the photocatalyst for hydrogen evolution. Advanced characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), transient photocurrent responses, electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and Mott-Schottky test, confirmed the composite's excellent visible and near-infrared light absorption and Z-scheme heterojunction architecture. Its remarkable performance originates from the effective p-n heterojunction formed between Cu 2 O and CuO. Upon a 300 W xenon lamp (350 < λ < 780 nm) illumination, photogenerated electrons and holes are produced in Cu 2 O and CuO, respectively. Electrons from the conduction band (CB) of CuO migrate to the valence band (VB) of Cu 2 O, recombining with holes. This mechanism not only enhances charge separation and extends carrier lifetime but also preserves the strong reducing capability of Cu 2 O, significantly boosting photocatalytic activity. The composite achieved a hydrogen production rate of 511.07 μmol/(g h). Notably, it retained stable performance over three consecutive cycles without significant activity loss, demonstrating robust durability. These findings highlight the potential of Cu 2 O/CuO/C Z-scheme heterojunctions as efficient, stable photocatalysts for sustainable hydrogen evolution.
研究领域:
能源转换
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材料科学
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环境科学
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可再生能源
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纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Feng Jiang,Shanghua Liu,Mengxiao Mo,Xinyu Liu,Dongyu Han,Qing Liu,Yueyuan Li,Yueyun Li,Yaqi Li,Qin Wei
As an emerging contaminant in the environment, trenbolone (TBE) has aroused a global health crisis and caused the huge impact on ecosystem. Its sensitive detection is critical to safeguard human health and ecosystem. Herein, a photocurrent polarity switching photoelectrochemical (PEC)-electrochemical (EC) dual-mode sensing platform was presented for highly selective and sensitive detection of TBE by ingeniously tailor signal probe. The tailored Cu 2 O@CuO-hemin acting as both photocurrent polarity reversal and electroactivity factor were cross-linked with TBE-BSA to obtain competitive conjugates for TBE. When the competitive response was initiated, numerous of Cu 2 O@CuO-hemin nanocomposites are introduced on the CdS-modified indium tin oxide electrode, serving as the reporting agent of EC/PEC dual-mode assay. The photocurrent polarity of the CdS-modified ITO can be effectively switched, enabling PEC analysis of TBE with distinguishing photocurrent changes. The linear response range is 1 pg/mL to 500 ng/mL, and the detection limit is 15.0 fg/mL. Meanwhile, the Cu 2 O@CuO could triggered the amplified current variations via effectually catalyzing the H 2 O 2 decomposition compared to the CdS NPs, leading to the sensitive electrochemical detection of TBE with a detection limit 200 fg/mL and a linear response range from1 pg/mL to 500 ng/mL. Additionally, the developed sensing platform enabled mutual authentication of PEC/EC detection results, being conducive to increasing the assay reliability and accuracy. Such the dual-mode sensor has great potential for detecting environmental pollutants due to its improved selectivity and mutual authentication of results.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Yinying Wang,Qu Zhang,Tao Wang,Yafen Zheng,Dongling Wu
Aqueous zinc-ion batteries (AZIBs), characterized by excellent safety, cost-effectiveness, and environmental friendliness, have emerged as a research focus in metal batteries. However, their low capacity and poor temperature adaptability hinder their practical application. Herein, deep eutectic solvents (DESs) are used as solvents, morphology assistants, and reducing agents to synthesize a sea-urchin-like Cu 2 O@CuO heterojunction composite. This unique interfacial structure significantly accelerates ion diffusion and generates additional active sites. Characterization and theoretical calculations indicate that the heterojunction interface provides additional electromotive force, effectively promoting electron migration. The scanning electrochemical cell microscope (SECCM) has the capability to visually map heterogeneous interfaces and identify Zn 2+ storage sites, and thus allows for their visualization. Furthermore, a gel electrolyte is prepared by dissolving PVA in one of the DES components. Notably, the flexible AZIB assembled using the prepared Cu 2 O@CuO and gel electrolyte displays a specific discharge capacity of 337.1 mAh g −1 and demonstrates broad temperature applicability within the range of −25–60 °C. In this study, the functionalization of DES is utilized to prepare Cu 2 O@CuO, which paves a novel route for the synthesis of more metal oxide heterostructure electrode materials.
研究领域:
材料科学
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电化学
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储能技术
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纳米材料
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电池技术
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2025
·
IF 2
Huilong Xu,Yi Xu,Qian Zhang,Qianli Zhang,Jie Liu,Haidong Bian
The methanol oxidation reaction (MOR) serves as a significant supplementary technique in the overall water splitting process and is recognized as a promising strategy for reducing the potential required to generate renewable hydrogen energy. This study presents the development of cost-effective and easily fabricated copper-based electrocatalysts through a straightforward anodization method. The resulting Cu-based electrocatalyst has been employed to evaluate the efficacy of the MOR in enhancing the water splitting process. Notably, the performance of the synthesized Cu2O/CuO electrocatalyst demonstrates a substantial improvement in the required overpotential, decreasing from 425 mV in 1.0 M KOH to 212 mV in 1.0 M KOH and 1.0 M methanol, to achieve a current density of 10 mA cm-2. The present work presents us a new way to reduce the necessary potential for the overall water splitting process using affordable Cu-based catalysts.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Ang Li,Huiying Qiu,Zhaohui Wang,Yanzhi Sun,Yang Tang,Pingyu Wan,Haomin Jiang,Yongmei Chen
Converting methane (CH4), the greenhouse gas, into high-value liquid oxygenates by an electrochemical method under mild conditions is a desired technology for establishing an energy- and environment-sustainable society. However, challenges from the competition of the oxygen evolution reaction and selectivity of the desired products still exist. Here we report the catalytic performance of Cu2O/CuO for electrochemical conversion of methane into ethanol (CH3CH2OH). Density functional theory calculations demonstrated that the Cu2O/CuO interface enables efficient CH4 adsorption, which provides an effective pathway for methane utilization under mild conditions. Based on electrochemical studies and electron paramagnetic resonance (EPR) measurement results, it is confirmed that the activated CH4 is converted to CH3CH2OH by reaction with active oxygen species (•OH radicals) electrogenerated in situ through the water oxidation reaction over Cu2O/CuO on the anode. Under the optimized conditions, a Faraday efficiency (FE) of 21.1% and a production rate of 126.7 μmol gcat–1 h–1 at ambient pressure for CH3CH2OH production were obtained, and the FE remained ∼19.0% at 2.2 V cell voltage during 8 h of electrolysis. When the pressure in the bath was lifted to 4.0 bar, the production rate of 441.3 μmol gcat–1 h–1 with an FE of 69.2% was obtained due to the higher solubility of CH4 in aqueous solution.
研究领域:
电化学
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催化
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能源可持续性
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环境科学
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产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Jiawei Sun,Min Li,Xueyan Sun,Lu Wang,Peng Han,Guicun Qi,Dali Gao,Lijing Zhang,Shengyang Tao
The integral catalytic impeller can simultaneously improve reaction efficiency and avoid the problem of catalyst separation, which has great potential in applying heterogeneous catalysis. This paper introduced a strategy of combining electroless copper plating with 3D printing technology to construct a pluggable copper-based integral catalytic agitating impeller (Cu-ICAI) and applied it to the catalytic reduction of 4-nitrophenol (4-NP). The obtained Cu-ICAI exhibits very excellent catalytic activity. The 4-NP conversion rate reaches almost 100% within 90 s. Furthermore, the Cu-ICAI can be easily pulled out from the reactor to be repeatedly used more than 15 times with high performance. Energy-dispersive spectrometry, X-ray diffraction, and X-ray photoelectron spectroscopy characterizations show that the catalyst obtained by electroless copper plating is a ternary Cu-Cu2O-CuO composite catalyst, which is conducive to the electron transfer process. This low-cost, facile, and versatile strategy, combining electroless plating and 3D printing, may provide a new idea for the preparation of the integral impeller with other metal catalytic activities.
研究领域:
化学工程
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催化科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2019
·Vol. 9
·期 27
·1901396
·
IF 24.884
Hao Yang,Yu-wen Hu,Jun-jie Chen,M.-Sadeeq (Jie Tang) Balogun,Ping-ping Fang,Shanqing Zhang,Jian Chen,Yexiang Tong
The challenge in the artificial CO 2 reduction to fuel is achieving high selective electrocatalysts. Here, a highly selective Cu 2 O/CuO heterostructure electrocatalyst is developed for CO 2 electroreduction. The Cu 2 O/CuO nanowires modified by Ni nanoparticles exhibit superior catalytic performance with high faradic efficiency (95% for CO). Theoretical and experimental analyses show that the hybridization of Cu 2 O/CuO nanowires and Ni nanoparticles can not only adjust the d-band center of electrocatalysts to enhance the intrinsic catalytic activity but also improve the adsorption of COOH* intermediates and suppress the hydrogen evolution reaction to promote the CO conversion efficiency during CO 2 reduction reaction. An in situ Raman spectroscopic study further confirms the existence of COOH* species and the engineering intermediates adsorption. This work offers new insights for facile designing of nonprecious transition metal compound heterostructure for CO 2 reduction reaction through adjusting the reaction pathway.
研究领域:
材料科学
·
电化学
·
催化反应
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Shida Gong,Xinguang Wu,Shiying Li,Yajun Ding,Zhongliang Xiao
This investigation examines the thermocatalytic behavior of hollow Cu 2 O/CuO nanocomposites toward a molecular perovskite energetic material. The incorporation of hollow Cu 2 O/CuO nanocomposites at weight percentages of 1 %, 5 %, and 10 % consistently reduced the peak thermal decomposition temperature ( T p ) compared to pure DAP-4. Specifically, the T p values decreased by 50.70 °C, 76.98 °C, and 78.46 °C, respectively. This enhanced thermal stability was accompanied by a corresponding decrease in activation energy values, which were lower by 115.9 kJ/mol, 200.57 kJ/mol, and 209.98 kJ/mol, respectively. Base on the findings, we proposed a possible catalytic decomposition mechanism of DAP-4 mediated by hollow Cu 2 O/CuO nanocomposites.
研究领域:
材料科学
·
含能材料
·
纳米技术
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热催化
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无机化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 11
·1-12
·
IF 2.5
Li Fangyuan,Yao Niu,Yuan Huiyu,Cui Junyan,Jia Quanli
The redox properties of electrode materials play a vital role in electrochemical performance. Fabrication of electrode materials with multiple oxidation species is highly desired for ultrasensitive glucose sensing. Herein, multivalent Cu/Cu 2 O/CuO/C (Cu/C) nanocomposites were successfully prepared for non-enzymatic glucose sensing by in situ pyrolysis of Cu metal-organic framework (Cu 3 (BTC) 2 ·3H 2 O, Cu-BTC) at a critical temperature. Structure characterizations showed that the nanocomposites maintained the original morphology of Cu-BTC crystals and exhibited mesoporous structures. Meanwhile, multiple Cu species containing Cu, Cu 2 O and CuO were generated simultaneously, which were tightly pinned on the ligand-derived carbon layers. Thus, under the synergistic effect of multivalent Cu species, mesoporous structure and intense interface contact, the sensing platforms based on Cu/C nanocomposites exhibited good glucose detection performance with a wide linear range of 0.005-2.0 mM, ultrasensitivity of 147.65 μA mM -1 cm -2 , low detection limit of 6.31 μM (S/N = 3), and favorable anti-interference properties and stability. Especially, the Cu/C sensing platform showed excellent recoveries of glucose when used to monitor glucose in real sample of honey. The good electrochemical activities of Cu/C nanocomposites render them promising candidates for sensors and other applications. Graphical abstract
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高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Lingna Sun,Qingwei Deng,Yongliang Li,Libo Deng,Yanyi Wang,Xiangzhong Ren,Peixin Zhang
Ternary copper oxides/reduced graphene oxide (Cu 2 O-CuO-RGO) composites were successfully synthesized in situ by a self-assembly solvothermal method in a water-ethanol mixture and used directly as the anode material for lithium ion batteries . The Cu 2 O-CuO-RGO composites delivered a reversible capacity of 842.5 mAh g −1 after 80 cycles at a current density of 100 mA g −1 , and after every 10 cycles at current densities of 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 , respectively, the specific capacities of the composites were approximately 840, 723, 511, 402, 336, 224, and 703 mAh g −1 , respectively. The improved electrochemical performance of the composites is closely related to its sandwich structure, with multicomponent Cu 2 O-CuO nanospheres adhering tightly to both sides of RGO nanosheets . This structure could shorten the transport pathways for both electrons and lithium ions , prevent the RGO nanosheets from stacking, enhance the electrical conductivity and accommodate the volume expansion that occurs during prolonged cycling.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）