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
·
材料科学
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DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Lanfeng Guo,Renlong Liu,Zhaobo He,Shaoping Li,Tong Tan,Changyuan Tao
The copper connectivity technique is essential for achieving electrical interconnection in wafer level packaging (WLP), system in packaging (SiP), and 3D packaging. The essential processing material for copper connectivity is a copper sulfate electroplating solution in which organic additives play a crucial role in the regularity of copper electrodeposition. In this study, electrochemical tests, X-ray diffraction, 3D profiling, and scanning electron microscopy were used to investigate the leveling effect and mechanism of polyquaternary ammonium urea-containing polymer (PUB2) in the process of copper electrodeposition on-chip copper connections. PUB2 has excellent polarization ability on the target surface, remains unaffected by the sulfur additive SPS and poly(ethylene glycol), and displays a strong ability to regulate the copper deposition rate of through-holes and surface wiring. The waviness of the wafer surface wiring was reduced from 130 to approximately 70 nm after optimizing the PUB2 concentration, and the surface roughness was reduced from 10 to approximately 7 nm. The coating was dispersed evenly, and the rate of through-hole filling was improved by 57%. This study not only examined PUB2 leveling performance and mechanisms but also devised a research method and system for electroplating additives to facilitate the development and application of new electroplating additives.
研究领域:
材料科学
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电子工程
·
电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2014
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IF 5.9
Yu Chang,Chao Yang,Xin-Yao Zheng,Dong-Yu Wang,Zhen-Guo Yang
A novel patterning–adsorption–plating process to additively fabricate copper patterns is developed. Functional ink with ion-adsorption nanoparticles was inkjet printed on PET substrate to form the patterned adsorption film. Catalytic ion was adsorbed by amino groups in the adsorption film, and catalyzed the electroless plating of copper. The mercapto groups introduced to the film enhance the reliability of the patterns. Specific solvent used in the ink increase the surface roughness of the adsorption film, leading to a better adhesion of the patterns. The prepared copper patterns show excellent conductivity about the same with bulk copper and good adhesion on PET.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 5
·909-915
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IF 3.719
Zhong Yaping,Zhu Jingjing,Wang Qingpu,He Yu,Ge Yili,Song Congwu
We show that copper nanoclusters coated with bovine serum albumin are viable probes for fluorometric determination of Cu(II) ion. The effect is attributed to the paramagnetic nature of Cu(II) bound to BSA. The ions Hg(II) and Fe(III) also give a strong effect but can be discerned by addition of EDTA. The probe can be regenerated by adding an excess of EDTA. The method is capable of detecting Cu(II) in the 0.02–34 μM, and the limit of detection is 1nM. The method was applied to the determination of Cu(II) in spiked water samples. It is rapid, simple, and fairly sensitive. The method may also be applied to detect Hg(II) and Fe(III) if Cu(II) is absent.
BSA-coated copper nanoclusters (NCs) are added to the sample, and EDTA is then added to block potentially interfering ions. The fluorescence of the NCs increases with increasing concentration of Cu(II) ions being present.
研究领域:
分析化学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2018
·
IF 4.862
Cheng Shi,Yizhen Wang,Yinzhe Yu,Jin Li,Daquan Zhang,Lixin Gao
The click chemistry reaction between 2, 2-dimethylethynyl carbinol (MBY) and tosyl azide (TA) was used to form triazole films on copper surface. The effect of cuprous ions on the assembled films was investigated by the electrochemical measurements. The assembled films have the best protection efficiency of 93.8%. The attack of chloride ions gives out cuprous ions to catalyze the formation of compact triazole films. It shows that the assembled films have an anodic passivation role, and suppress the anodic corrosion reactions evidently. The role of cuprous ions on the films formation during the assembling process is discussed.
研究领域:
材料科学
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电化学
·
表面工程
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Li Zheng,Song Luo,Sijie Yang
Carbon steel is a widely used metallic material. It is prone to corrosion. In this study, we designed and fabricated a superhydrophobic layer with corrosion resistance for protection of carbon steel substrate. Multiple layers were formed that acted as barriers to protect the substrate from corrosion. This superhydrophobic layer reduced the contact area between the substrate and the corrosive medium owing to the superhydrophobicity. The experimental results showed that a copper layer uniformly covered the carbon steel substrate, and the outer surface of the copper layer was converted into copper oxide , which had a multi-scale structure. The Cu/CuO double layer was modified with stearic acid (SA) to form a Cu/CuO@SA superhydrophobic layer. The superhydrophobic layer exhibited a high water contact angle (up to 160°) and a low sliding angle (<3°). The superhydrophobic layer also exhibited repulsive effect to salt, acidic and alkaline solutions. Atmospheric stability test and UV irradiation test were conducted and the results indicated that the superhydrophobic layer was stable throughout the test period. The corrosion potential of the superhydrophobic sample was −0.18 V and the corrosion current density was 7.72 × 10 −7 A cm −2 , which was one order of magnitude lower than that of the carbon steel substrate. These results indicate that the superhydrophobic sample had a low corrosion tendency and corrosion rate. The polarization resistance and impedance modulus of the superhydrophobic sample were two orders of magnitude higher than the bare steel sample, indicating corrosion resistance and effective protection to the carbon steel substrate.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Wei Xiao,Qing Zhang,Dong Hui You,Nian Bing Li,Guang Ming Zhou,Hong Qun Luo
Copper is an essential trace element in the human body, and its level is directly related to many diseases. While the source of copper in human body is mainly intake from food, then the detection of copper ions (Cu 2+ ) in food becomes crucial. Here, we synthesized a novel probe ( E )-3-hydroxy-2-styryl-4 H -benzo[h]chromen-4-one ( NSHF ) and explored the binding ability of NSHF for Cu 2+ using nuclear magnetic resonance hydrogen spectroscopy ( 1 H NMR), high-resolution mass spectrometry (HRMS), Job's plot method and density functional theory (DFT). NSHF shows the advantages of fast response time, good selectivity and high sensitivity for Cu 2+ . The fluorescence intensity ratio (F/F 0 ) of NSHF shows a good linear relationship with the concentration of Cu 2+ and the detection limit is 0.061 μM. NSHF was successfully applied to the detection of Cu 2+ in real samples. In addition, a simple and convenient Cu 2+ detection platform was constructed by combining NSHF with a smartphone and a UV lamp, which can realize the rapid detection of Cu 2+ . This work provides an effective tool for the real-time detection of Cu 2+ .
研究领域:
分析化学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jingbo Wang,Xinyue Li,Yushan Lan,Hanyu Wang,Xiulan Ma,Hongbin Wang,Haoyu Xu,Huiqing Liu
The recontamination of farming wastewater with antibiotics and metal ions has emerged as a considerable concern in recent years. In this study, fly ash (FA) served as the adsorbent material, and its modified form (AFA) was developed via response surface optimization. The study involved an analysis of the structure and chemical composition of the fly ash before and after modification, both pre- and post-modification, through the use of scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analyses. These analyses were aimed at exploring the adsorption mechanism of ciprofloxacin (CIP) in the presence of copper ion (Cu 2+ ) in livestock and poultry wastewater. The study indicates that the optimal modification parameters for AFA include an alkali-to-ash ratio of 1.5, a calcination temperature of 400 °C, and a 3-hour calcination period. At pH 6, AFA exhibited a markedly superior adsorption capacity for CIP in comparison to FA, with AFA achieving 19.32 mg/g and FA only 9.61 mg/g. The adsorption process conforms to the quasi-second-order kinetic model and Langmuir isothermal model.The adsorption capacity for CIP increases at low concentrations, specifically when Cu 2+ levels are below 100 mg/L. Nevertheless, elevated CIP concentrations impede the adsorption process. The adsorption of AFA for CIP is observed to decrease with rising temperature, in contrast to the adsorption of Cu 2+ , which increases as the temperature rises. The adsorption mechanism of AFA is primarily comprised of pore filling, ion exchange, electrostatic interaction, π bond coordination, complexation, and other similar processes.
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
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6562-6573
·
IF 2.993
Jia Zhengfeng,Li Haoqi,Zhao Yao,Dikin Dmitriy A.,Ni Junjie,Zhao Limin,Zhen Jinming,Ge Bo,Shao Xin,Ren Fei
In this study, copper (Cu)/polydopamine (PDA) composite was fabricated by vacuum hot-press sintering of micrometer-sized Cu particles covered with PDA film tailored at the nanometer scale thickness. The resultant compacts exhibited much higher electrical conductivity than the uncoated counterparts. Analyses of sintered samples using scanning and transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy revealed the conversion of PDA into carbonized PDA (cPDA). The increased mass density and grain growth are likely responsible for improved electrical conductivity of the composite material.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
BIOLOGICAL TRACE ELEMENT RESEARCH
·
2016
·Vol. 174
·期 1
·85-92
·
IF 1.798
Zhou Sihui,Zhang Caiying,Xiao Qingyang,Zhuang Yu,Gu Xiaolong,Yang Fan,Xing Chenghong,Hu Guoliang,Cao Huabin
Molybdenum (Mo) is an essential trace element for animals and human beings. However, the negative effects on rumen function and distribution of trace elements in tissues induced by excessive Mo have not been well understood. Therefore, the purpose of present study was to investigate the impact of Mo on rumen microbiota, distribution of trace elements in various organs, and hematological parameters of goats. A total of 36 goats were randomly distributed into three groups with equal number and low-Mo and high-Mo groups were orally administered ammonium molybdate at 15 and 45 mg · Mo · kg −1 · BW respectively, while the control group received corresponding quantitative deionized water. The results showed that the total number of ciliate and protozoa protein concentration decreased significantly ( P < 0.01) on days 25 and 50. Concentrations of ammonia nitrogen and bacterial protein were significantly higher ( P < 0.05) in low-Mo group, while they were lower ( P < 0.05) in high-Mo group than the control group on days 25 and 50. In addition, Mo accumulated in serum and all detected tissues. Copper (Cu) and zinc (Zn) contents significantly decreased ( P < 0.05) in hair and serum on days 25 and 50, while Cu contents increased ( P < 0.05) and the change of Zn contents were not obvious ( P > 0.05) in other tissues on days 25 and 50. Besides, there was no obvious variation in iron (Fe) contents during whole experiment period ( P > 0.05). Furthermore, excessive Mo content had no significant effect on red blood cell (RBC) counts and hemoglobin (HGB) concentration ( P > 0.05) on days 25 and 50, while white blood cell (WBC) counts increased significantly ( P < 0.05) on day 50. These results indicated that excessive Mo content could impact the balance of ruminal microorganisms and interfere with the absorption and distribution of Mo and Cu mainly.
研究领域:
动物营养学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Ziyang Chu,Zhengyan Han,Haibo Liu,Tianhu Chen,Xuehua Zou,Hanlin Wang,Fuwei Sun,Hao Wang,Dong Chen
The simultaneous removal of heavy metal complexes (HMCs) and heavy metal ions presents a significant challenge in treating wastewater. To address this, we propose a Calcite/Peroxymonosulfate (Calcite/PMS) system aimed at simultaneously decomplexing Cu-EDTA and removing Cu ions . Calcite/PMS system could achieve 99.5 % Cu-EDTA decomplexation and 61.9 % Cu ions removal within 60 min under initial conditions of Cu-EDTA (10 mg/L), Calcite (3 g/L), and PMS (2 mM). Singlet oxygen ( 1 O 2 ) emerged as the predominant reactive species responsible for Cu-EDTA decomplexation, which selectively targeted the N-C bonds in the Cu-EDTA structure to produce intermediates with lower biotoxicity than EDTA. Interestingly, solid phase Cu(III) (≡Cu(III)) promoted the generation of superoxide radicals (O 2 •− ) with a contribution of up to 72.8 %. Subsequently, nascent ≡Cu(III) and O 2 •− accelerated the degradation of intermediates. Besides, coexisting organic substances inhibited Cu-EDTA decomplexation, whereas inorganic ions had a weak impact. After five cycles of use, the Calcite/PMS system retained 99.3 % efficiency in decomplexing Cu-EDTA. This investigation provides valuable insights into using calcite to remove HMCs and enhances our comprehension of the decomplexation intermediates accelerating HMCs degradation.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2024
·Vol. 13
·期 5
·054001
·
IF 1.8
Changxin Dong,Xinhuan Niu,Jianghao Liu,Ni Zhan,Yida Zou,Chao He,Xinjie Li,Fu Luo,Yunhui Shi,Jiabao Cheng
For Ruthenium (Ru)-based copper (Cu) interconnects Cu film chemical mechanical polishing (CMP), it is crucial to select appropriate pH regulators in the slurry to ensure the chemical reactions and maintain the stability of the polishing chemical environment. In this study, the effects of inorganic pH regulator KOH, organic pH regulator diethanolamine (DEA), and 2-amino-2-methyl-1-propanol (AMP) on CMP and slurry properties of Cu film were compared. It was found when using AMP as a pH regulator, the Cu/Ru removal rate selectivity (RRS) can reach 598:1, the surface roughness of Cu film decreased to 0.76 nm, and the slurry can remain stable for at least 7 d. The performance order of the three pH regulators is AMP＞KOH＞DEA. Meanwhile, through experimental results and test analysis, it has been confirmed that AMP can also play a multifunctional role as a complexing agent, dispersant, and surfactant. Therefore, AMP can replace KOH as a new pH regulator in weak alkaline slurries. This result plays an important role in guiding the selection of organic pH regulators in the optimization of Cu film CMP slurry.
研究领域:
材料科学
·
化学工程
✓ 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）