APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
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IF 8.328
Min Jiang,Yilin Gao,Zhaoyu Wang,Zhengxin Ding
Spinel CuCo 2 O 4 nanoplates were synthesized through a solvothermal method coupled with a calcination treatment in air. The prepared CuCo 2 O 4 samples were fully characterized by diverse physical and chemical techniques including powder X-ray diffraction (XRD), field emission scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and N 2 sorption measurement. The CuCo 2 O 4 material was developed as an efficient, low-cost and stable cocatalyst to boost photochemical CO 2 conversion with Ru(bpy) 3 2+ as a homogeneous photosensetizer. The catalytic performance of the CuCo 2 O 4 samples was evaluated toward visible-light-driven deoxygenative reduction of CO 2 to CO under mild conditions. Various parameters of the reaction system and the synthesis conditions of CuCo 2 O 4 were investigated and optimized to maximize the catalytic performance of CO 2 reduction system. The stability and the reusability of the CuCo 2 O 4 cocatalyst were examined. Moreover, the CuCo 2 O 4 cocatalyst was further proved to be highly active to promote CO 2 photoreduction catalysed by CdS semiconductor as a heterogeneous light harvester, and markedly reinforced photocatalytic CO 2 reduction performance was achieved.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Jiaru Peng,Tianze Han,Qian Liu,Wenqian Luan,Ruiyang Zhao,Jishu Han,Lei Wang
The development of efficient composite photocatalyst to decompose water and produce hydrogen utilizing solar energy is the important measure to achieve carbon neutrality. Herein, hollow CuCo 2 O 4 double-shell nanospheres were obtained by calcination in air, and then modified with Mn 0.2 Cd 0.8 S in different mass ratios to obtain hollow CuCo 2 O 4 –Mn 0.2 Cd 0.8 S double-shell nanospheres. When the mass ratio of CuCo 2 O 4 and Mn 0.2 Cd 0.8 S was 1:10, the photocatalytic hydrogen production rate reached to 25.17 mmol g −1 h −1 without noble metal cocatalyst. The high photocatalytic performance of CuCo 2 O 4 –Mn 0.2 Cd 0.8 S benefited from the hollow structure of CuCo 2 O 4 and the formation of type-I heterostructure, which increased the utilization rate of visible light, accelerated the electrons transfer and reduced the recombination of electron and hole. Meanwhile, CuCo 2 O 4 nanospheres provided the support for Mn 0.2 Cd 0.8 S and reduced the agglomeration phenomenon of Mn 0.2 Cd 0.8 S, thus exhibiting good photostability. This research provided a new insight for constructing efficient hollow composite photocatalyst.
研究领域:
材料科学
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能源科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Li Wang,Hanlun Yang,Lijuan Xu,Canwei Peng,Yonghai Song
A novel Cu–Co-zeolite imidazole framework (Cu–Co-ZIF)-derived CuCo 2 O 4 @carbon nanocomposites supported on three-dimensional porous carbon (3D-KSC) were prepared to develop molecularly imprinted electrochemical sensors for sensing dopamine (DA). Firstly, polyhedral Cu–Co-ZIF was synthesized at room temperature and uniformly arrayed on 3D-KSC, and then the CuCo 2 O 4 @carbon nanostructure was obtained by high-temperature carbonization under nitrogen atmosphere. Finally, the molecularly imprinted polymer (MIPs) DA-imprinted chitosan was covered by potentiostatic electrodeposition to obtain the MIPs/CuCo 2 O 4 @carbon/3D-KSC integrated electrode. The results showed 15 μm-sized polyhedral Cu–Co-ZIF crystals were transformed into smaller irregular porous CuCo 2 O 4 @carbon nanocomposites with rough surface by calcination . Here, the produced 5 nm-sized CuCo 2 O 4 crystals were uniformly embedded into the N-doped porous carbon frameworks. Various experimental conditions including the amount of Cu–Co-ZIF grew on 3D-KSC, calcination temperature, electrodepositing time of MIPs, the eluted time of template molecule and the pH of electrolyte were explored. The as-prepared MIPs/CuCo 2 O 4 @carbon/3D-KSC integrated electrode exhibited excellent anti-interference ability and good stability. The sensitivity for DA detection was 720.8 μA mM −1 cm −2 , the detection range was 0.51 μM–1.95 mM, and the detection limit was 0.16 μM.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Lijun Liao,Haochen Zhang,Wenyao Li,Xiaojuan Huang,Zhiyin Xiao,Kaibing Xu,Jianmao Yang,Rujia Zou,Junqing Hu
CuCo 2 O 4 maguey-like nanowires were obtained via a facile hydrothermal reaction and subsequent annealing at 300 °C for 3 h. The CuCo 2 O 4 nanowires interacting with each other to form CuCo 2 O 4 maguey-like nanowires structure offers the great specific surface area, excellent electron and ion transfer ability, easy approach for electrolyte transmitting to electrode surface. Our prepared CuCo 2 O 4 electrode materials showed a high areal capacitance of 3.27 F cm −2 at 5 mA cm −2 , an outstanding specific capacitance of 982 F g −1 at 1.5 A g −1 and an excellent capacitance retention of 100.94% after 3000 circles at 50 mV s −1 . In addition, a symmetry supercapacitor was been assembled with a high energy density of 16.87 Wh kg −1 , a high power density of 8.2 kW kg −1 and outstanding cycle life, which demonstrates that our prepared material has great potential application for supercapacitors.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Cheng Chen,Li Liu,Yuxin Li,Wei Li,Lixiang Zhou,Yeqing Lan,Ying Li
CuCo 2 O 4 was synthesized via the calcination of a copper-cobalt bimetallic oxalate precursor and was used as a heterogeneous catalyst of peroxymonosulfate (PMS) for the degradation of sulfamethazine (SMZ). The results demonstrated that the CuCo 2 O 4 had higher catalytic activity than the monometallic CuO and Co 3 O 4 . The degradation efficiency of SMZ (50 mg/L) by PMS (1 mmol/L) activated with CuCo 2 O 4 (0.1 g/L) was above 98% within 30 min at initial pH 5. Electron paramagnetic resonance (EPR) and radical quenching experiments proved that both sulfate radicals (SO 4 − ) and singlet oxygen ( 1 O 2 ) were responsible for the efficient removal of SMZ, especially 1 O 2 . The superoxide radicals (O 2 − ) produced from the reaction improved the generation of SO 4 − and 1 O 2 . Cyclic voltammograms (CV), electrochemical impedance spectroscopy (EIS) and hydrogen temperature- programmed reduction (H 2 -TPR) investigations revealed that the synergy of Cu and Co species in PMS activation resulted from higher electroconductibility, more electron transfer, and better redox potential of the CuCo 2 O 4 . The synergy between the Co(III)/Co(II) and the Cu(II)/Cu(I) couples enhanced the turnover frequency (TOF) of CuCo 2 O 4 . The possible degradation pathways are further proposed according to the identification of the SMZ degradation products and the theoretical calculations of the frontier electron densities (FEDs) of the SMZ molecule.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Mei Dong,Wenjun Li,Liang Geng,Ruixue Huang,Yuan Liu,Hongli Han
Herein, CuCo 2 O 4 hollow porous nanospheres (HPN), nanosheets (NS), and nanowires (NW) were synthesized via solvothermal and calcination processes, and were used to construct efficient heterojunctions with Cd 0.5 Zn 0.5 S. Interestingly, the unique hollow porous structure exhibits enhanced light absorption, large pore diameter (12.57 nm), and strong hydrophilicity (10.05°). Photocatalytic results indicate that CuCo 2 O 4 HPN/Cd 0.5 Zn 0.5 S achieves the optimal hydrogen production rate, which is 5.4, 1.2, and 1.3 times than that of pure Cd 0.5 Zn 0.5 S, CuCo 2 O 4 NW/Cd 0.5 Zn 0.5 S and CuCo 2 O 4 NS/Cd 0.5 Zn 0.5 S, respectively. High-resolution TEM and theoretical calculations confirm that (311)/(111) facet junctions in CuCo 2 O 4 nanospheres form a work function difference (0.24 eV), which significantly facilitates charge transfer and separation. Mott-Schottky and Ultraviolet photoelectron spectroscopy analyses indicate that p-type CuCo 2 O 4 and n-type Cd 0.5 Zn 0.5 S have staggered energy levels and a distinct Fermi level difference (1.85 eV), which leads to rearrangement of the Fermi energy level and modulation of charge transfer pathway. The resulting energy band bending and built-in electric field promote charge transfer at the heterojunction interface more effectively. The synergistic mechanism of the facet junction and p-n junction finally achieves high-efficiency hydrogen production. This work provides new insights into how to construct efficient p-n heterojunction photocatalysts and presents the synergistic mechanism of facet junction and p-n junction.
研究领域:
材料科学
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能源科学
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化学
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产品关联
DOI
高影响因子
Analytical Methods
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2023
·Vol. 15
·期 34
·4331-4337
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IF 3.1
Xin Xiao,Wenchun Liao,Rao Ma,Long Huang,Yunhui Yang
In this work, a highly sensitive colorimetric sensing platform was designed for the detection of trichlorfon based on inhibiting thiocholine (TCh)-induced redox reaction. 5,10,15,20-Tetracarboxyphenylporphyrin (TCPP) functionalized CuCo2O4 (TCPP–CuCo2O4) was synthesized to construct a colorimetric sensing platform for trichlorfon. In the presence of H2O2, TCPP–CuCo2O4 can oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue ox-TMB, accompanied by a strong absorption peak at 652 nm, while acetylcholinesterase (AChE) can specifically hydrolyze acetylthiocholine (ATCh) into TCh, which can reduce ox-TMB back into colorless TMB, resulting in a lower absorbance at 652 nm. Trichlorfon can irreversibly inhibit the activity of AChE and thus recover the absorption peak. Under the optimized conditions, detection of trichlorfon has a wide linear range of 40–4000 ng mL−1 with a linear correlation coefficient of 0.9904. The proposed method can be applied to the detection of trichlorfon in vegetables and has good application prospects.
研究领域:
分析化学
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环境科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
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2023
·
IF 9.4
Chuhan Zhang,Qingli Sui,Lin Lu,Yongjin Zou,Fen Xu,Lixian Sun,Dan Cai,Cuili Xiang
This paper presents CuCo 2 O 4 @MoNi-layered double hydroxides (CuCo 2 O 4 @MoNi-LDH) core–shell assemblies synthesized successfully by a stepwise process using hydrothermal and calcination methods. The morphology of a core–shell structure consisting of nanosheets grown uniformly on the surface of the hollow spheres was realized. The results showed that CuCo 2 O 4 @MoNi-LDH hollow spherical nano-sheets are an excellent choice for applications that require outstanding structural stability and a high specific surface area. A specific capacitance of 1286 F g −1 was obtained at a current density of 1 A g −1 , which indicates its promising application in supercapacitors . Furthermore, asymmetric supercapacitors assembled using CuCo 2 O 4 @MoNi-LDH positive electrodes achieved an ultra-high strength density of 68.1 Wh kg −1 at an energy density of 795.9 W kg −1 with an excellent cycling stability (i.e., the capacitance retention rate of 88 % after 6000 cycles). According to these findings, CuCo 2 O 4 @MoNi-LDH is a strong contender for power storage applications.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yangbo Huang,Yun Yang,Zeyu Guan,Qiang Li,Dongsheng Xia
In this study, a new functionalized flat-sheet ceramic membrane (CuCo 2 O 4 -CM) was prepared by an impregnation-calcination strategy and used in the removal of Bisphenol A (BPA). Various characterization results indicated that a CuCo 2 O 4 layer was uniformly anchored on the membrane surface and the internal porous channels. The CuCo 2 O 4 -CM possessed a smaller mean pore size (80 nm) and better hydrophilicity than the pristine α-Al 2 O 3 substrate after modification. The catalytic degradation in CuCo 2 O 4 -CM /PMS system revealed that 92.1% of BPA and 70.0% of TOC could be removed under optimal conditions (pH = 7.0, C BPA = 30 mg/L and C PMS = 2 mM). Meanwhile, the membrane showed good reusability and improved antifouling properties. During the reaction, four reactive oxygen species (·OH, SO 4 ·- , O 2 ·- and 1 O 2 ) were generated and they all responded for the degradation of BPA. In addition, the mechanism of PMS activation and BPA degradation were proposed. This study presented an efficient oxidation process for BPA degradation and outlines the synergistic effect of separation and catalytic oxidation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Energy Storage
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2024
·
IF 8.9
Caofeng Zhang,Fang Cui,Qinghai Ma,Tieyu Cui
NiO is considered as a promising electrode material owing to its high theoretical capacitance. However, the inherent low conductivity and huge volume expansion during cycling limit its practical application. Constructing composites is considered as an effective way to improve charge transfer efficiency and enhance electrochemical performance. Therefore, many researchers are devoted to combining NiO with other materials to build composites to solve this problem. However, the preparation of composites with uniformly distributed heterojunctions in a simple way remains a major challenge. Herein, porous NiO/CuCo 2 O 4 composites with uniformly distributed heterojunctions were fabricated via a facile and cost-effective method. Benefiting from the porous structure and the synergistic effect of NiO and CuCo 2 O 4 , the NiO/CuCo 2 O 4 –450 electrode exhibits outstanding specific capacitance of 962 F g −1 at the current density of 1 A g −1 . Additionally, with porous NiO/CuCo 2 O 4 –450 composites as anode and active carbon (AC) as cathode, the asymmetric supercapacitor (ASC) provides an energy density of 25.17 Wh kg −1 at a power density of 400 W kg −1 and an excellent cycle life. This study provides a facile and favourable strategy for the preparation of composites with distinguished electrochemical properties.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Wenqi Wang,Yuyu Cui,Xiaolong Wei,Ying Zang,Xulin Chen,Liang Cheng,Xianwen Wang
Nanozyme-driven catalytic therapy provides a promising treatment strategy for bacterial biofilm-infected wounds. However, the single functionality and limited catalytic efficiency of nanozyme-based materials often restrict the effectiveness of wound infection treatment. In this study, CuCo2O4 nanoflowers with multiple enzymatic activities were prepared for antibacterial/antibiofilm treatment by cuproptosis-like death. CuCo2O4 exhibited peroxidase-like (POD-like) and oxidase-like (OXD-like) dual enzyme activities that generated large amounts of •OH and O2•–. Moreover, the glutathione peroxidase-like (GSH-Px-like) activity of CuCo2O4 was able to reduce the overexpression of GSH in the wound microenvironment, enhancing the therapeutic effects of reactive oxygen species (ROS). The morphology of CuCo2O4 was modified using a hydrothermal method with PEG4000 as the solvent, resulting in the exposure of more active center sites and a significant improvement in enzyme catalytic activity. The in vitro results demonstrated the pronounced disruption effect of CuCo2O4 on biofilms formed by bacteria. In vivo, CuCo2O4 significantly promoted angiogenesis, collagen deposition, and cell proliferation. Transcriptome sequencing revealed that elevated ROS levels in bacteria led to cell membrane damage and metabolic disruption. In addition, Cu2+ overload in bacteria induces lipid peroxidation accumulation and disrupts the respiratory chain and tricarboxylic acid (TCA) cycle, ultimately leading to bacterial cuproptosis-like death. This therapeutic strategy, which combines the synergistic effects of multiple enzyme-like activities with cuproptosis-like death, provides an approach for treating biofilm infections.
研究领域:
生物医学工程
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材料科学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Di Cheng,Tuo Wang,Guangxue Zhang,Huimin Wu,He Mei
Cu x Co 3-x O 4 (x = 0.5, 1, 1.5, 2) are successfully synthesized through hydrothermal and calcination processes. A series of electrochemical tests reveal that all of them exhibit electrocatalytic activity towards glucose and H 2 O 2 . Among them, CuCo 2 O 4 (x = 1) has a unique double-shelled hollow structure and shows higher catalytic performance. The electrochemical sensor based on CuCo 2 O 4 displays a linear range from 2.5 μM to 7.9 mM, with a sensitivity of 400.0 μA mM −1 cm −2 for the detection of glucose. As for H 2 O 2 , it shows a linear range from 10.0 μM to 8.9 mM, with a sensitivity of 94.1 μA mM −1 cm −2 . The sensor also exhibits short response time (<3 s), good selectivity, reproducibility, and stability over 18 days. Thus, this novel non-enzyme sensor has potential application in glucose and H 2 O 2 detection.
研究领域:
生物化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）