ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Min Zhang,Jin Wang,Xinyuan Zhan,Wusong Xu,Maolin He,Ding Ma,Zhengbo Yue
Thiocyanate (SCN − ), a non-volatile inorganic pollutant, is commonly found in various types of industrial wastewater, which is resistant to hydrolysis and has the potential to be toxic to organisms. Premagnetized iron-copper-carbon ternary micro-electrolytic filler (pre-Fe/Cu/C) was prepared to degrade SCN − . Pre-Fe/Cu/C exhibited the most significant enhancement effect on SCN − removal when magnetized for 5 min with an intensity of 100 mT, and the SCN − removal rate was the highest at an initial pH of 3.0 and an aeration rate of 1.6 L/min. The electrochemical corrosion and electron transfer in the pre-Fe/Cu/C system were confirmed through SEM, XPS , FTIR , XRD , and electrochemical tests. This resulted in the formation of more corrosion products and multiple cycles of Fe 2+ /Fe 3+ and Cu 0 /Cu + /Cu 2+ . Additionally, density functional theory (DFT) calculations and electron paramagnetic resonance (EPR) were utilized to illustrate the oxygen adsorption properties of the materials and the participation of reactive oxygen species ( 1 O 2 , ·O 2 − , and ·OH) in SCN − removal. The degradation products of SCN − were identified as SO 4 2− , HCO 3 − , NH 4 + , and N 2 . This study introduced the use of permanent magnets for the first time to enhance Fe/Cu/C ternary micro-electrolytic fillers, offering a cost-effective, versatile, and stable approach that effectively effectively enhanced the degradation of SCN − .
研究领域:
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 Environmental Chemical Engineering
·
2024
·
IF 7.4
Guihong Han,Baogang Cai,Shuzhen Yang,Xin Ding,Bingbing Liu,Yanfang Huang
Microelectrolysis (ME) is an efficient method for treating organic wastewater. The utilization of copper slag for high-performance microelectrolysis material preparation for pollutant degradation is meaningful for environmental conservation. Herein, a Fe-Cu-C microelectrolysis material (MEM) was prepared by carbothermal reduction with copper slag, copper powder and anthracite as the raw materials for phenol degradation in wastewater. The phase and structural transformations that occur in the reduction process of copper slag during MEM preparation were investigated via X-ray diffraction (XRD) and an electroprobe microanalyzer (EPMA). The prepared Fe-Cu-C MEMs were characterized by XRD, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The anchored structure of the iron droplets on the SiO 2 bulk surface is beneficial for the microelectrolysis reaction as well as for the stability of the microstructure. The Fe-Cu-C MEM displayed wide pH and temperature application ranges for phenol degradation. Interestingly, 1 O 2 was found to play a critical role in phenol degradation in the ME system. Under the optimal conditions, the phenol degradation efficiency of Fe-Cu-C MEM reached 96.48% after 60 min, with chemical oxygen demand and total organic carbon removal rates of 82.65% and 67.34%, respectively. This research provides a feasible method for the production of Fe-Cu-C MEM and the degradation of phenol in wastewater.
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 Cleaner Production
·
2019
·
IF 6.395
Junwen Qi,Guoping Wei,Yubo Yan,Xiuyun Sun,Lianjun Wang,Jiansheng Li
Protecting the staff on site from exposure risk to toxic industrial chemicals (TICs) in an efficient way is of great significance. However, simultaneous removal of multicomponent TICs with different physical and chemical properties is a challenge for porous carbon materials. In this work, Cu-carbon beads with tailored porous structure and chemical property were synthesized via phase inversion-carbonization (PIC) route. The in-situ introduction of copper species was accomplished via coupling solidification-reduction of copper species and PIC process. The obtained Cu-carbon beads possessed uniform spherical shape (Φ1.3 mm) with good mechanical strength, developed porous structure and abundant chemical groups. Three kinds of TICs with different chemical properties, i.e. benzene (nonpolar), ethanol (polar) and H 2 S (inorganic), were selected as probes to evaluate the simultaneous elimination performance of Cu-carbon beads. The optimized Cu-beads-3 exhibited excellent performance for multicomponent TICs with capacities of 491.9 mg benzene/g, 192.1 mg ethanol/g and 76.2 mg H 2 S/g, representing 74.0, 60.3 and 99.2% capacities compared with monocomponent TICs. The enhanced adsorption of H 2 S were ascribed to chemisorption of copper species and basic groups on Cu-carbon beads. These results indicated that Cu-carbon beads would be a promising candidate for the simultaneous elimination of TICs with different chemical properties.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Yan Dai,Hao Zhang
In this article, copper carbonate analog with good peroxidase-like activity was successfully synthesized for the first time via a simple co-precipitation of CuSO 4 ▪5H 2 O and Na 2 CO 3 . The obtained copper carbonate analog exhibited excellent intrinsic peroxidase-like activity towards a classical peroxidase substrate of 3, 3′, 5, 5′ -tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) under an acidic environment. The study of the catalytic mechanism confirmed that the hydroxyl radical produced from the decomposition of H 2 O 2 is the main reactive oxygen species responsible for the catalytic oxidation of TMB to oxTMB. Moreover, results from kinetic parameter analysis indicated that H 2 O 2 was more easily and/or likely to attach to the copper carbonate analog than TMB. Subsequently, the effects of experimental conditions (buffer pH, temperature, and incubation time) on the catalytic activity of the copper carbonate analog were also optimized. Finally, a copper carbonate analog-based colorimetric sensor was developed to determine isoniazid. Under the optimal conditions, the linear range for isoniazid was as broad as 0–178.6 μM, and the detection limit was as low as 8.47 μM. The spiked recoveries of isoniazid in normal human serum has been observed in the range of 94.8%–105.5 %. This strategy focuses on the development of a green, cost-efficient peroxidase mimic with high activity, good biocompatibility, and a simple synthesis process.
研究领域:
生物化学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Lingli Wang,Yu Zhu,Dan Yang,Lei Zhao,Hanming Ding,Zhaohui Wang
Effective photogenerated charge separation and rapid Cu(II)/Cu(I) redox cycling is still challenging for photocatalytic reactions and copper-based Fenton-like process, respectively. Herein, a novel heterogeneous Fenton-like catalyst of copper incorporated carbon ring- g -C 3 N 4 (Cu-C-CN) was prepared through a facile calcination method. The carbon ring could be intimately connected with g -C 3 N 4 via sp 2 -hybridized C N bonds to form an in-plane π-conjugated structure. The carbon ring spliced g -C 3 N 4 (C-CN) can serve as an effective electron-hole separator owing to the varied electron affinity of two domains (e.g. carbon-ring and g -C 3 N 4 ). The copper species were further introduced to the framework of g -C 3 N 4 via the Cu N bonds to act as acceptors of conduction-electrons from g -C 3 N 4 and H 2 O 2 activators. Taking the photodegradation of methylene blue (MB) as a model reaction, the decomposition efficiency over Cu-C-CN is 5.5 times higher than that of pristine g -C 3 N 4 , and would nearly linearly increase with pH. The notable enhancement in photodegradation efficiency could be ascribed to the synergetic collaboration between photocatalysis process and Fenton-like process to generate abundant OH and e − . The Cu-C-CN catalyst shows high recycling stability with negligible Cu leaching due to the strong affinity of Cu 2+ to g -C 3 N 4 framework. The strategy of coupling Fenton-like catalysts, electron-deficient domains (e.g. carbon-ring) into semiconductor-based photocatalysis provides a facile and promising solution to the remediation of water pollution with solar energy.
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
RENEWABLE ENERGY
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2022
·
IF 8.634
Yunlong Yao,Zhiquan Yu,Chenyang Lu,Fanfei Sun,Yao Wang,Zhichao Sun,Yingya Liu,Anjie Wang
Copper catalysts showed excellent C O hydrogenation selectivity, but poor ability of hydrogen dissociation. Herein, a strategy to improve the activity of a Cu-based catalyst is developed by thermal treatment of Cu(OH) 2 at 100 °C with C 2 H 2 /Ar (0.5 vol%) followed by H 2 reduction at 300 °C. By means of X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS), it was revealed that Cu x C crystallites , in addition to Cu crystallites, were present in the prepared catalysts. In furfural hydrogenation at 60 °C and 1.0 MPa, the Cu x C-containing catalyst showed significantly higher activity than the Cu counterpart prepared from the same precursor by H 2 reduction at 300 °C. The introduction of ZnO improved the dispersion, and thus led to enhanced catalytic performance. The Cu x C-Cu-ZnO catalyst with Zn/Cu molar ratio of 0.5 showed considerably high hydrothermal stability in a 70-h run, with furfural conversion of >99.0% and the furfuryl alcohol selectivity of 100%.
研究领域:
化学工程
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催化科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
·
IF 6.216
Hongying Zhao,Lin Qian,Ying Chen,Qingning Wang,Guohua Zhao
The selective two-electron oxygen reduction reaction (ORR) for an onsite Fenton oxidation reaction over an integrated cathode is a promising method for environmental restoration. Here, an economic iron-copper-embedded carbon aerogel (FeCuC) exhibited high ORR activity (half-wave potential of −0.19 V vs SCE). The electron transfer number (n) over FeCuC was 2.9. Indeed, Fe@Fe 3 C promoted the ORR activity, while Cu enhanced the selectivity of the two-electron ORR. Meanwhile, the simultaneous incorporation of Fe and Cu simultaneously facilitated the sequential Fenton oxidation induced by H 2 O 2 . The individual rate constants for ORR and the oxidation reaction successfully revealed the fact that the efficient Fenton oxidation reaction again promotes again the 2-electron O 2 reduction pathway. The application of FeCuC as a cathode in the electro-Fenton (EF) process, involving both high ORR and high Fenton oxidation activities, exhibited efficient total organic carbon (TOC) removal (88–99%) in 240 min for dimethyl phthalate (DMP), imidacloprid (IMI), bisphenol A (BPA) and perfluorooctanoate (PFOA). Moreover, five types of sanitary sewage were successively treated to meet the national discharge standards (chemical oxygen demand (COD) < 50 mg L −1 ) with relatively low specific energy consumption (20–40 kW·h·(kg COD ) −1 ) using FeCuC in the heterogeneous EF process.
研究领域:
环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2014
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IF 5.211
Kaiqiang Wu,Xiaoting Lin,Lianyi Shao,Miao Shui,Nengbing Long,Yuanlong Ren,Jie Shu
Core–shell Li 2 Na 2 Ti 6 O 14 @Cu/C is prepared by a preliminary formation of Li 2 Na 2 Ti 6 O 14 by solid state reaction and a following coating process with Cu/C layer by thermal decomposition. The amorphous Cu/C coating layer reveals a thickness of 5 nm on the surface of Li 2 Na 2 Ti 6 O 14 , which improves the electronic conductivity and charge transfer rate of active materials. As a result, Li 2 Na 2 Ti 6 O 14 @Cu/C shows lower electrochemical polarization and quicker kinetic behavior compared to bare Li 2 Na 2 Ti 6 O 14 . Cycled at 50 mA g −1 , Li 2 Na 2 Ti 6 O 14 @Cu/C can deliver a reversible capacity of 120.3 mAh g −1 after 50 cycles, which is much higher than the value of 96.8 mAh g −1 obtained by Li 2 Na 2 Ti 6 O 14 . Even kept at 400 mA g −1 , a reversible lithium storage capacity of 76.3 mAh g −1 can be delivered by Li 2 Na 2 Ti 6 O 14 @Cu/C. The improved electrochemical properties of Li 2 Na 2 Ti 6 O 14 are attributed to the electronic conductive Cu/C coating layer on the surface.
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
ENVIRONMENTAL TECHNOLOGY
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2017
·
IF 1.751
Giovanni Cagnetta,Jun Huang,Igor O. Lomovskiy,Gang Yu
Zero-valent iron (ZVI) is a valuable material for environmental remediation, because of its safeness, large availability, and inexpensiveness. Moreover, its reactivity can be improved by addition of (nano-) particles of other elements such as noble metals. However, common preparation methods for this kind of iron-based composites involve wet precipitation of noble metal salt precursors, so they are often expensive and not green. Mechanochemical procedures can provide a solvent-free alternative, even at a large scale. The present study demonstrates that it is possible to tailor functional properties of ZVI-based materials, utilizing high-energy ball milling. All main preparation parameters are investigated and discussed. Specifically, a copper-carbon-iron ternary composite was prepared for fast degradation of 4-nitrophenol (utilized as model pollutant) to 4-aminophenol and other phenolic compounds. Copper and carbon are purposely chosen to insert specific properties to the composite: Copper acts as efficient nano-cathode that enhances electron transfer from iron to 4-nitrophenol, while carbon protects the iron surface from fast oxidation in open air. In this way, the reactive material can rapidly reduce high concentration of nitrophenols in water, it does not require acid washing to be activated, and can be stored in open air for one week without any significant activity loss.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 23
·期 12
·2100623
·
IF 3.862
Yu Yao,Wei Guo,Xingwen Zhou,Peng Peng
The growing demand for highly efficient heat management in flexible electronics requires fabrication of highly conductive flexible films. Herein, Cu–C film on a polyimide (PI) substrate is fabricated to form a layered Cu–C/PI composite conductive film using direct laser writing. Its oxidation resistance is significantly improved compared with the written Cu film due to the presence of a graphite shell on Cu particles in the Cu–C film. Furthermore, the Cu–C/PI composite film shows better thermal properties than Cu/PI. This work provides a one-step method for rapidly fabricating Cu/PI and Cu–C/PI composites with good thermal stability and conductivity.
研究领域:
材料科学
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柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shuai Wang,Zhongmei Che,Min Zou,Yue Wu,Min Cui,Yingshu Guo,Mingrui Zhang,Wei Hu,Zihan Zou,Guangqiang Lv,Zexing Wu,Jeonghun Kim,Yusuke Yamauchi
Fabricating inexpensive and quality bifunctional catalysts for catalyzing oxygen reduction/evolution reactions (ORR/OER) is urgent for the wide application of zinc-air batteries (ZAB). Herein, a bifunctional catalyst, nitrogen-doped graphdiyne (Cu NPs/NGDY) with Cu-C and N-C active moieties, is fabricated through pyrolysis. Cu NPs/NGDY exhibits excellent catalytic performance towards ORR ( E 1/2 = 0.86 V), stability of 86.5% current retention for 24 h and OER ( E j=10 = 360 mV). Experimental results and theoretical calculations reveal the vital role of Cu-C and nitrogen doping in regulating electrocatalytic activity. Assembled with Cu NPs/NGDY as electrocatalyst, both the liquid-state and flexible ZABs exhibit high power density and barely changed gap between discharge and charge voltage with robust stability, demonstrating tremendous potential in the field of wearable-related equipment. This work develops a simple strategy to fabricate GDY -based bifunctional catalyst.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huangqing Ye,Jiahui Chen,Songrui Wei,Yougen Hu,Yu Wang,Xian-Zhu Fu,Rong Sun
Copper/carbon (Cu/C) hybrids with two-dimensional (2D) dendritic-like structure were successfully synthesized by a one-pot biological hydrothermal method with biomass as the reducing agent, capping agent, and template. By hydrothermal carbonization, the graphitic carbon is in-situ coated on the surface of nano copper to obtain a new type of 2D Cu/C materials. This method was facile, green, tunable and scalable. The influential factors on the morphology and carbon content of as-prepared hybrids were investigated, and possible growth mechanism was proposed. The as-prepared Cu/C hybrid materials exhibited a smallest thickness of 2.5 nm, with a radius-to-thickness ratio as high as 10 3 . Benefiting from the typical 2D structure and graphitic carbon coating layer, Cu/C hybrids exhibited excellent oxidation resistance and electrical conductivity , thus having great potential as a conductive adhesive filler used in the field of flexible electronics.
研究领域:
材料科学
·
生物学
✓ 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）