JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Huaiwei Zhang,Yifan Chen,Ying Pan,Liang Bao,Jing-yuan Ge
Environmentally friendly photocatalytic N 2 fixation process has attracted considerable attention. Developing efficient photocatalysts with high electron-hole separation rates and gas adsorption capacities remains quite challenging. Herein, a facile fabrication strategy of Cu-Cu 2 O and multicomponent hydroxide S-scheme heterojunctions with carbon dot charge mediators is reported. The rational heterostructure brings excellent N 2 absorption ability and high photoinduced electron/hole separation efficiency, and the ammonia produced yield reach above 210 µmol·g cal -1 ·h −1 during the nitrogen photofixation process. More superoxide and hydroxyl radicals are generated simultaneously in the as-prepared samples under light illumination. This work offers a reasonable construction method to further develop suitable photocatalysts for ammonia synthesis .
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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产品关联
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2023
·
IF 2.2
Runmian Ming,Cailing Zhang,Liangbo Xie,Jing Chang,Yi Li
Although gold (Au) plays an important role in many fields, the residual Au3+ ion in our natural environment is one of the most noxious heavy metal ions for animals and plants. It is of great significance to develop an efficient and simple detection method for Au3+. Based on heterogeneous catalytic activation of peroxymonosulfate (PMS) by Ag@Cu2O nanoparticles (Ag@Cu2O NPs), a novel, visible and convenient strategy for Au3+ detection was developed. The well-dispersive Ag@Cu2O NPs could catalyze PMS to produce sulfate radicals (SO4•−) and hydroxyl radicals (·OH) which could oxide 3, 3′, 5, 5′-tetramethylbenzidine (TMB) into oxidized TMB (oxTMB) in colorimetric detection. The introduced Au3+ could effectively enhance catalytic activation of PMS to produce more SO4•− and ·OH. This was because there was the synergistic effect of Au and CuO, which reduced the charge transfer resistance and promoted electron transfer. This method had good specificity against 22 types of cationic or anionic interfering ions and the detection limit of Au3+ was about 290 nmol·L−1. In this study, a new substrate of PMS was used for colorimetric detection of heavy metal ions, and the catalytic synergy of Au and CuO in PMS/Ag@Cu2O NPs/Au3+ colorimetric detection system was analyzed in detail.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2019
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IF 3.834
Pijun Duan,Ruidian Su,Xing Xu,Qian Li,Baoyu Gao
In this paper, a novel preparation method was applied to fabricate 3D porous Cu 2 O-Fe 3 O 4 @carbon nanocomposites (Cu 2 O-Fe 3 O 4 @CN) using natural polymer hydrogel. The polymer hydrogel was used as template to immobilize cupric ions and ferrous ions first, it was then followed by a series of preparing processes including sedimentation, desiccation and calcination. Characterization analysis including TEM, EDS, XPS, XRD and VSM were employed to characterize the morphologies and structures of Cu 2 O-Fe 3 O 4 @CN . The photocatalytic performance of Cu 2 O-Fe 3 O 4 @CN for organic contaminant degradation under visible light irradiation was also evaluated. The effect of different preparation conditions on the morphology structure and photocatalytic performance of Cu 2 O-Fe 3 O 4 @CN was investigated and the optimal parameters were determined. After four repetitive use, the degradation efficiency only decreased from 95.1% to 90.1%, which suggested the great potential of Cu 2 O-Fe 3 O 4 @CN in industrialization and commercialization. Cu 2 O; Fe 3 O 4 ; Nano materials; Sodium alginate; Photocatalysis; Synergistic effect
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 60
·37596-37603
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IF 3.108
Dan Zhao,Chang-Man Tu,Xue-Jing Hu,Ning Zhang
Cu2O is an important compound for many promising applications; however, its real state under serious application conditions, such as redox atmosphere of catalysis reactions, has seldom been investigated. In this study, a dramatic and sustainable activity enhancement for CO oxidation on catalytically used Cu2O nanoporous sphere samples was discovered as compared to that on their fresh counterparts. To illustrate the phenomenon, comprehensive characterizations such as XRD, H2-TPR, TEM, XPS, and CO-TPD were performed on fresh and used Cu2O samples. It was found that after one or several catalytic runs, the main phase among the used samples retained the crystalline feature of Cu2O. However, the surface would transform into a stable multivalent composite interface with almost unchanged Cu(II) : Cu(I) ratio (around 4.0) and active oxygen distribution, even after only one catalytic run for CO oxidation; this indicated a notable reaction-induced or in situ surface restructuring effect of the Cu2O substrates. Compared to that of pure Cu2O, CuO, and reported CuxO samples, the active chemisorbed oxygen on these in situ restructured samples was observed in particularly higher surface composition (with the ratio of chemisorbed oxygen to lattice oxygen being around 5.5); this was further demonstrated to be highly efficient for the oxidization of CO in a relatively low temperature range even in the absence of O2 in the atmosphere and could be the main contributor to speed up CO oxidation in these samples. A similar enhancement in the activity on the used samples for CO oxidation as compared to that on the fresh samples was further testified in Cu2O nanomaterials with different morphologies such as cubic, octahedral, and 18-facet polyhedral nanoparticles; this implied that the surface restructuring effect under a redox reaction atmosphere was a common feature of the Cu2O-based materials, and the transformed surface could act as a superior and stable interface for heterogeneous catalysis. These findings might help in recognizing the real state of Cu2O-containing materials under serious application conditions or designing highly efficient Cu2O-based materials via convenient atmosphere-controlled manipulation for advanced applications.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2020
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IF 0
Muhammad Waqas,Liyun Wu,Huaguo Tang,Chengzhou Liu,Youjun Fan,Zhe Jiang,Xiaoqu Wang,Jingping Zhong,Wei Chen
Metal oxide-based nano/microstructures assembled on heteroatom-doped carbon nanomaterials are promising materials to design the electrocatalysts with enhanced electrochemical performances. In this work, a systematic protocol was contrived to fabricate hybrid electrode material based on Cu2O microspheres (MSs) supported on sulfur-doped multiwalled carbon nanotubes (Cu2O MSs/S-MWCNTs). The adequate doping of sulfur and successful fabrication of Cu2O MSs/S-MWCNTs were confirmed by various microscopic and spectroscopic techniques, and then the tailor-made Cu2O MSs/S-MWCNTs composite was employed to establish a nonenzymatic sensing system for controlled monitoring of glucose. A high surface area of Cu2O MSs and sulfur doping inside the MWCNTs collectively enhanced the electrocatalytic activity of Cu2O MSs/S-MWCNTs as revealed through cyclic voltammetry (CV) analysis. The enhanced electrochemical efficacy of Cu2O MSs/S-MWCNTs may be credited to the creation of heterojunctions during the doping process, forming the highly defected structures with increased number of catalytic active sites. In addition, the Cu2O MSs/S-MWCNTs/GCE presented the good amperometric response for glucose sensing attaining optimal linear range, satisfactory sensitivity, excellent stability, and glucose specific selectivity. These unique chemical and electrochemical features strongly encourage the potential applicability of our designed Cu2O MSs/S-MWCNT electrocatalyst for targeted monitoring of glucose.
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
Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Tongle Gao,Ting-Ting Li,Xilin Liao,Jia-Horng Lin,Bing-Chiuan Shiu,Ching-Wen Lou
Photoelectrodes constructed with photoactive materials are of great significance for the performance of photoelectrochemical (PEC) sensors. In this study, a facile and efficacious non-enzymatic glucose sensor based on the Cu 2 O/TiO 2 heterojunction was successfully constructed for quantitative determination of glucose concentration. The Cu 2 O/TiO 2 heterojunction was generated by first obtaining TiO 2 nanofibers via electrostatic spinning and high-temperature calcination, and then synthesizing Cu 2 O nanoparticles via a one-step hydrothermal reaction. By introducing the narrow band gap semiconductor Cu 2 O, the defect that pure TiO 2 could not absorb visible light was improved, resulting in the improved photoelectrochemical performance of the composite material compared to the single component semiconductor. The sensor exhibited favorable PEC non-enzymatic glucose sensing performance under simulated sunlight irradiation with a wide linear response range from 1 mM to 14 mM (R 2 = 0.9991) and a low detection limit of 14.4 μM (S/N = 3), along with good selectivity, stability and reproducibility. This also provided more ideas and possibilities for preparing photoelectrode materials by constructing heterojunctions.
研究领域:
材料科学
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分析化学
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生物传感
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产品关联
DOI
高影响因子
FOOD CONTROL
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2021
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IF 5.548
Alberta Osei Barimah,Zhiming Guo,Akwasi A. Agyekum,Chuang Guo,Ping Chen,Hesham R. El-Seedi,Xiaobo Zou,Quansheng Chen
Arsenic (As) is one of the toxic, persistent, and lethal heavy metalloids and requires rapid, less costly, and sensitive detection methods. This study proposed a label-free cuprous oxide/silver (Cu 2 O/Ag) surface-enhanced Raman scattering (SERS) nanoprobe to detect total As in tea. Different total As spiked tea concentrations were mixed with the Cu 2 O/Ag SERS nanoprobe for the SERS detection. Quantitative models were established for predicting the total As in tea by comparatively applying chemometric algorithms. Amongst the algorithms, competitive adaptive reweighted sampling partial least squares (CARS-PLS) optimized the most effective spectral variables to predict the total As in tea efficiently. The CARS-PLS gave the highest correlation coefficient value (R p = 0.9935), very low root means square error (RMSEP = 0.0496 μg g −1 ) in the prediction set and recorded the highest RPD value of 8.819. The proposed nanoprobe achieved a lower detection limit (0.00561 μg g −1 ), excellent selectivity, satisfactory reproducibility, and stability. No significant difference was recorded when the performance of the Cu 2 O/Ag total As SERS sensor was compared with the inductively coupled plasma mass spectrometry (ICP-MS) method. Therefore, this developed Cu 2 O/Ag coupled chemometrics SERS sensing method could be used to efficiently determine, quantify, and predict total As in tea to promote monitoring of heavy metal contaminants.
研究领域:
食品科学
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
Advanced Science
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2022
·Vol. 9
·期 16
·2105292
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IF 17.521
Yawen Jiang,Xinyu Wang,Delong Duan,Chaohua He,Jun Ma,Wenqing Zhang,Hengjie Liu,Ran Long,Zibiao Li,Tingting Kong,Xian Jun Loh,Li Song,Enyi Ye,Yujie Xiong
Structural reconstruction is a process commonly observed for Cu-based catalysts in electrochemical CO 2 reduction. The Cu-based precatalysts with structural complexity often undergo sophisticated structural reconstruction processes, which may offer opportunities for enhancing the electrosynthesis of multicarbon products (C 2+ products) but remain largely uncertain due to various new structural features possibly arising during the processes. In this work, the Cu 2 O superparticles with an assembly structure are demonstrated to undergo complicated structure evolution under electrochemical reduction condition, enabling highly selective CO 2 -to-C 2+ products conversion in electrocatalysis. As revealed by electron microscopic characterization together with in situ X-ray absorption spectroscopy and Raman spectroscopy, the building blocks inside the superparticle fuse to generate numerous grain boundaries while those in the outer shell detach to form nanogap structures that can efficiently confine OH − to induce high local pH. Such a combination of unique structural features with local reaction environment offers two important factors for facilitating C−C coupling. Consequently, the Cu 2 O superparticle-derived catalyst achieves high faradaic efficiencies of 53.2% for C 2 H 4 and 74.2% for C 2+ products, surpassing the performance of geometrically simpler Cu 2 O cube-derived catalyst and most reported Cu electrocatalysts under comparable conditions. This work provides insights for rationally designing highly selective CO 2 reduction electrocatalysts by controlling structural reconstruction.
研究领域:
材料科学
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电化学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 26
·期 7
·5071-5077
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IF 1.569
Li Anli,Li Pengwei,Hu Jie,Zhang Wendong
Single crystal Cu 2 O materials with morphologies of cube, truncated cube, truncated octahedron, octahedron etc. have been synthesized by a facile glucose reduction method. Polyvinylpyrrolidone concentration dependent, crystal-facet-controllable growth mechanism of the synthesized Cu 2 O crystals has been proposed in the article. The photocatalytic test results show that the octahedral Cu 2 O crystals with dominant {111} planes have super photocatalytic activity than the cubic ones packaged by {100} surfaces, which could be explained by that the polar, highly active {111} facets with unsaturated “Cu” have more excellent activity on the methyl orange dye degradation. This article will contribute to promote the morphology construction and crystal-dependent catalytic properties of metal oxide semiconductor materials.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2025
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IF 5.8
Cuicui Liang,Fei Zha,Xiaohua Tang,Xiaojun Guo,Haifeng Tian,Yue Chang
The misuse of antibiotics leads to the emergence of a variety of drug-resistant bacteria, which poses a serious threat to human life. Novel antimicrobial strategies are urgently needed. Herein, peroxidase-like enzyme material of Cu 2 O/NPC/Pal was prepared from Cu 2 O/nanoporous carbon (Cu 2 O/NPC) derived from Cu-MOF in the presence of palygorskite (Pal) by the pyrolysis-etching-pyrolysis strategy. Cu 2 O/NPC/Pal could catalyze the production of ·O 2 − from H 2 O 2 to cause the oxidative stress and cell membrane damage to bacteria. The antibacterial rates against Staphylococcus aureus and Pseudomonas aeruginosa reached 98.99 % and 92.70 %, respectively. In addition, Cu 2 O/NPC/Pal can promote the oxidation of glutathione and the consumption of intracellular effectively. Introduction of Pal into Cu 2 O/NPC significantly enhances the binding affinity and forms a highly concentrated substrate microenvironment. The study provided the pyrolysis strategy for the synthesis of carbon-based metal oxide nanomaterials in combination with mineral-based materials for the enhancement of peroxide-like activity in antimicrobial application.
研究领域:
微生物学
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材料科学
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医学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 45
·22996-23002
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IF 7.443
Jing Bai,Yunpo Li,Rui Wang,Ke Huang,Qingyi Zeng,Jinhua Li,Baoxue Zhou
In this study, a novel three dimensional (3D) ZnO/Cu2O nanowire (NW) photocathode material with highly efficient photoelectrocatalytic performance was prepared on a copper substrate using simple, cost-effective wet chemical oxidation and hydrothermal growth methods. FE-SEM, TEM, XRD and XPS were used to investigate the 3D ZnO/Cu2O NWs, revealing the formation of the high density orientated Cu2O NW cores and ZnO NW shells. Compared with the pure Cu2O NWs, the 3D ZnO/Cu2O NWs showed a larger photocurrent (−4.55 mA cm−2) and better stability under AM 1.5G illumination (100 mW cm−2). In light of the high effective surface area and the ability to facilitate good electron transportation, this unique nanostructure will be favorable for efficient photoelectrocatalytic (PEC) water splitting and organic pollutant degradation.
研究领域:
材料科学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 99
·97129-97136
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IF 3.289
Wen-Bei Yu,Zhi-Yi Hu,Ming Yi,Shao-Zhuan Huang,Dai-Song Chen,Jun Jin,Yu Li,G. Van Tendeloo,Bao-Lian Su
Transition metal oxides with exposed highly active facets have become of increasing interest as anode materials for lithium ion batteries, because more dangling atoms exposed at the active surface facilitate the reaction between the transition metal oxides and lithium. In this work, we probed the electrochemical behavior of hollow Cu2O microspheres with {111} and {110} active facets on the polyhedron surface as anodes for lithium storage. Compared to commercial Cu2O nanoparticles, hollow Cu2O microspheres with {111} and {110} active facets show a rising specific capacity at 30 cycles which then decreases after 110 cycles during the cycling process. Via advanced electron microscopy characterization, we reveal that this phenomenon can be attributed to the highly active {111} and {110} facets with dangling “Cu” atoms facilitating the conversion reaction of Cu2O and Li, where part of the Cu2O is oxidized to CuO during the charging process. However, as the reaction proceeds, more and more formed Cu nanoparticles cannot be converted to Cu2O or CuO. This leads to a decrease of the specific capacity. We believe that our study here sheds some light on the progress of the electrochemical behavior of transition metal oxides with respect to their increased specific capacity and the subsequent decrease via a conversion reaction mechanism. These results will be helpful to optimize the design of transition metal oxide micro/nanostructures for high performance lithium storage.
研究领域:
材料科学
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电化学
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能源存储
✓ 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）