COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Yuhang Yuan,Wenting Cai,Jiaxin Xu,Jianhua Cheng,Ke-Si Du
Copper-based MOF (Cu-PABA) was selected to immobilize laccase (Lac) at optimum pH because of its favorable acid resistance. Cu-PABA@Lac biocomposites were synthesized in situ by the one-step method under moderate conditions (water environment and normal temperature and pressure). Cu-PABA@Lac had great potential to maintain stability due to the protection of the Cu-PABA shell and reasonable conformational changes. In addition, Cu-PABA@Lac could be used repeatedly by centrifugation, as confirmed in the degradation experiment of bisphenol A (BPA). Because of the synergistic effect of copper ions between laccase and Cu-PABA, the K m value decreased (from 0.0024 to 0.0014 mM); therefore, the affinity between laccase and guaiacol was enhanced. In conclusion, the system provides a choice for immobilized acid-resistant enzymes and a solution for environmental BPA degradation.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 33
·15642-15664
·
IF 3.5
Du Zhanjie,Wang Ru,Liu Bin,Zheng Tao,Dong Yanwei,Chen Xuhua,Liu Zeyu,Han Shengxing,Zeng Yao,Li Yiken
Through Silicon Via (TSV), a kind of 3D packaging technique, can improve chip integration based on “More than Moore” scheme. The larger copper area ratio at the TSV barrier layer interface requires strong adjustability of the removal rate selection ratio of copper, tantalum and TEOS–SiO 2 , and stronger surface defect control and surface profile correction capabilities. In this paper, the effects of guanidine hydrochloride (GH) and 2,2′-[[(Methyl-1H-benzotriazol-1-yl)methyl]imino]bisethanol (TT-LYK) system on the tunability of Ta and Cu removal rate in chemical mechanical polishing (CMP) of TSV wafer barrier material were studied. GH can complex \({\text{TaO}}_{4}^{{3}-}\) , while TT-LYK can form a protective film on the surface of Cu, thereby achieving rate regulation. The results showed that when the concentration of GH increased from 0 to 2 wt%, the removal rate selectivity ratio of Ta and Cu raised from 1.02:1 to 1.26:1. When the concentration of TT-LYK increased from 2.5 to 10 mmol/L, the removal rate selectivity ratio of Ta and Cu increased from 1.33:1 to 1.79:1, which verified that the GH and TT-LYK systems can efficiently regulate the rate and rate selection ratio of Ta and Cu. Surface roughness for both metals decreased from pre-polishing values of 5.03 nm to post-polishing values of 0.37 nm for Ta, from pre-polishing values of 5.33 nm to post-polishing values of 1.26 nm for Cu indicating that GH and TT-LYK systems significantly improved the surface quality. Graphical abstract
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·
IF 3.1
Bian Hang,Li Peng,Ma Yu,Liu Lin,Li Dong,Zhang Ning
In recent years, the surge in industrialization and urbanization has led to the release of a significant amount of heavy metal ions into water. These ions, when present in drinking water, can enter the human body and cause irreversible health problem. Metal-organic frameworks (MOFs) have drawn considerable attention for their outstanding ability to remove these heavy metal ions. However, MOF powders tend to aggregate in water, reducing their adsorption efficiency and potentially leading to secondary environmental pollution. In this regard, the development of MOF composites that are highly adsorptive, recyclable, and maintain stable dispensability in water is crucial for heavy metal ions removal. Herein, the in situ growth of zeolitic imidazolate framework (ZIF-8) on melamine sponge (MS) using a secondary growth method is reported. The resultant composite sponges exhibit high efficiency in adsorbing Pb(II) and Cu(II) from water and maintain good reusability. These findings offer a promising method in efficiently eliminating Pb(II) and Cu(II) from aqueous solutions.
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Zebang He,Zhong Wu,Zhiming Gao,Zhenbo Qin,Juntao Yuan,Yuan Gao,Yaorong Feng,Anqing Fu,Chun Wang,Wenbin Hu
A Ni-Al-Cu coating was prepared on NAB alloy through electroplating and heat treatment, and the erosion-corrosion behaviors were investigated. The results demonstrated that Ni-Al-Cu coating exhibited higher erosion resistance compared to NAB alloy, with an average reduction of 63 % in material removal rate (MRR). It was revealed that deformation and cracks were observed in NAB, with loss of hard κ and β phases alongside deformation of ductile α phase. Meanwhile, Ni-Al-Cu coating experienced fatigue delamination and grain disintegration due to alternating stress. Taguchi design method showed that increasing flow velocity and sand concentration could enhance the intensity of gravel impact, while changes in the erosion angle affected gravel impact modes and energy transfer, thereby impacting corrosion performance. Additionally, empirical equations for the material removal rate were derived through regression analysis, which became possible to predict the MRR under different influencing factors and assess the erosion-corrosion resistance of materials.
✓ 已验证
DOI
高影响因子
Environmental Science-Processes & Impacts
·
2014
·Vol. 16
·期 6
·1462-1468
·
IF 0
Lin Duan,Lingfang Li,Zhu Xu,Wei Chen
Nano-sized nickel oxide (nano-NiO) is a new nanomaterial that has shown great promise in many areas of application. Understanding its environmental fate and effects is critical for minimizing the potential environmental implications of this new material due to incidental and accidental releases in the future. In this study, we observed strong adsorption of tetracycline to nano-NiO and found that the adsorption affinity can be further enhanced by Cu(II) ions – the observed distribution coefficient (Kd) values are 103.1 to 104.2 L kg−1 in the absence of Cu(II) and 103.0 to 105.5 L kg−1 in the presence of Cu(II); such adsorption affinities are even comparable to those of tetracycline to carbonaceous materials. The strong adsorptive affinities of nano-NiO for tetracycline are likely attributable to several mechanisms, including surface complexation, cation exchange, and electrostatic attraction. As a strong complexing agent, Cu(II) can significantly enhance adsorption of tetracycline by serving as a bridging agent between tetracycline and nano-NiO. The findings of this study have important implications for the risk assessment of engineered nanomaterials – in aquatic environments nano-NiO (and likely other metal oxide nanomaterials) can strongly adsorb tetracycline antibiotics, resulting in the changes of environmental risks of the metal oxide nanomaterials and/or bioavailability of the adsorbed contaminants.
✓ 已验证
DOI
ACS Biomaterials Science & Engineering
·
2022
·
IF 5.395
Chongxian He,Xiangyang Zeng,Liuyimei Yang,Shiwei Zhong,Shuping Peng,Wenjing Yang,Cijun Shuai
Fe has immense potential for biodegradable orthopedic applications, but it degrades slowly in the physiological environment. Inducing galvanic couple by alloying Cu to Fe using ball milling is a promising approach. However, the ductile nature of Cu leads to the cold welding of a large amount of Cu powder during ball milling, which makes it difficult to disperse uniformly in the Fe matrix. Here, a Fe–CuO implant with highly dispersed Cu particles in the matrix was developed by shift-speed ball milling and selective laser melting. Specifically, copper oxide (CuO) particles were selected as precursors and dispersed in Fe powders by ball milling since they were brittle and would not be cold-welded during ball milling. After further milling in higher energy, it was found that CuO particles reacted with Fe and generated Cu particles through a stress-activated redox reaction. Subsequently, the obtained powders were prepared into a Fe–CuO implant using selective laser melting. Microstructure examination revealed that the Cu phases in the implant were dispersed evenly in the Fe matrix, which was considered to establish a large number of galvanic couples and aggravated the galvanic corrosion tendency. Electrochemical tests indicated that the implant had improved performance in degradation behavior in terms of high corrosion current density (22.4 μA/cm2), low corrosion resistance (1319 Ω cm2), and good degradation stability. In addition, it presented antibacterial effects against Escherichia coli and Staphylococcus aureus by diffusion mechanisms with killing rates of 90.7 and 96.7%, respectively, as well as good cytocompatibility.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Xiashuang Luo,Cehuang Fu,Shuiyun Shen,Xiaohui Yan,Liuxuan Luo,Junliang Zhang
A comprehensive understanding of the intricate surface environments of practical nanocatalysts at the atomic level is essential for advancing our knowledge of catalytic mechanisms. In this study, we investigate PtCu octahedral nanoparticles with varying microstrains engineered by Cu dispersion. A detailed analysis of the atom configuration and corresponding microstrain is conducted. The intimate mixing of Cu and Pt results in increased randomness in atom displacement within the lattice and a more pronounced distribution of alternating microstrain on the surfaces. Specifically, we observe that the PtCu concave octahedral nanoparticles with alternating microstrain demonstrate a substantial oxygen reduction reaction (ORR) activity of 3.95 mA cm–2 in area-specific activity. The significant impact of shear microstrain is further underscored, as evidenced by an 86.9% decrease in the ORR activity upon the removal of the alternating shear microstrain. This study sheds light on the effects of microstrain toward the ORR and provides valuable insights into designing advanced Pt-based electrocatalysts.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jun Wu,Wenzhong Zhang,Chunping Li,Erdan Hu
The effects of Fe(III) and Cu(II) on the sorption of atrazine (AT) and prometryn (PY) on clay minerals were investigated both preloaded and in solution. For smectite , Fe(III) preloading greatly enhanced AT and PY sorption at pH 4.0 and 6.0 but diminished AT sorption at pH 8.0. Cu(II) preloading promoted AT and PY sorption under alkaline conditions but suppressed AT sorption at pH 4.0. The adverse effects were not obvious for PY. While for illite and kaolinite , Fe(III) and Cu(II) had little or promotion effects due to the lower contents of them in these two minerals. In the co-sorption studies, for smectite, AT sorption remained at pH 4.0 and increased at pH 6.0 and 8.0, while PY sorption was inhabited over the pH range of 4.0–8.0 in the presence of Fe(III). AT and PY sorption were not affected by Cu(II) except for PY at pH 8.0, in which case, the sorption was promoted. For illite and kaolinite , Fe(III) and Cu(II) generally enhanced AT and PY sorption.
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 82
·期 4
·704-714
·
IF 1.638
Sun Jie,Xia Guotong,Yang Wenjin,Hu Yue,Shen Weibo
The radical generation properties of hydrogen peroxide and persulfate for phenol degradation were investigated under microwave irradiation using copper-doped silicon carbide (Cu/SiC) composites as catalyst. The results showed that 90% and 70% of phenol and total organic carbon (TOC), respectively, were removed within 7 min. Microwave activation of hydrogen peroxide and sodium persulfate in terms of thermal effects and accelerated electron transfer was analyzed by degradation kinetics and X-ray photoelectron spectroscopy (XPS). The microwave activation of Na 2 S 2 O 8 demonstrated that the hot spots promote decomposition of persulfate more rapidly and the rate of persulfate decomposition was more than three times the activation rate of a normal heating method. There is a synergistic effect between Cu and microwave radiation, which is highlighted by the H 2 O 2 activation; ·OH was generated due to the redox cycle between Cu(I)/Cu(II) and was responsible for phenol degradation using H 2 O 2 . High performance liquid chromatography (HPLC) analysis indicated that hydroxylation and sulfate radicals addition of phenol were the initial oxidation reaction steps of hydrogen peroxide and persulfate, respectively, followed by further oxidation to form short-chain carboxylic acids. The kinetic advantages of microwave-assisted reactions. The activation of persulfate involved thermal gradients and redox reaction simultaneously. The reaction mechanism in Na 2 S 2 O 8 -Cu/SiC system was examined.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 25
·10539-10554
·
IF 4.5
Wei Yinsha,Haider Zeeshan,Yu Yizhen,Li Bingzhi,Niu Haili,Qiu Ri,Ouyang Yibo,Liu Jie
Printed circuit boards (PCB) are easily corroded under moist environment due to formation of dendrites and short circuit. It would be a promising approach to exploit intentionally formed dendrite covered by functional coating for corrosion inhibition to elongate the lifespan of PCB. In this work, a facile electrodeposition method has been applied to grow dendritic tin onto Cu as a substrate for PCB. Bioinspired formation of superhydrophobic surface (SHS) and liquid-infused surface (LIS) are adopted to minimize access of moisture to underneath Cu metal. In this regard, dimethylsilicone oil and zeolitic imidazolate framework (ZIF) nanoparticles are infused into dendritic matrix to form a solid–liquid ZIF-LIS coating. Morphology, composition and wettability are characterized by different sophisticated techniques. Beyond significant improvement in corrosion resistance, ZIF-LIS has demonstrated self-healing properties, improved mechanical stability and anti-icing behavior. Current finding provides a new approach to fabricate coating for PCB having extended stability against corrosive degradation.
Graphical abstract
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 6
·1-16
·
IF 2.4
Li Tong,Liu Fuliang,Wang Xiaofang,Han Zhaohao,Jia Xiaoqiong,Wang Ping,Chu Qingyan,Sheng Yuxuan
The precise embedding of metal species within specific sites of zeolite frameworks and their unique microenvironments exert fascinating influences on catalytic performance. Herein, we report the rational design of a highly efficient Co-Cu@CTS-1 catalyst through the strategic incorporation of Co, Cu, and Ce into TS-1 zeolite, where Ce is doped at silicon atomic sites while Co and Cu are encapsulated within the zeolite cages. Mechanistic investigations reveal that the synergistic interplay among Co, Cu, and Ce is pivotal for catalytic activity: Co facilitates molecular oxygen activation to generate reactive oxygen species (O⁻), while Ce(III) enhances oxygen vacancy concentration, significantly boosting styrene conversion. Moreover, the distinctive electronic interaction between Ce and Cu markedly improves the selectivity toward styrene oxide. The optimized Co-Cu@CTS-1 catalyst exhibits exceptional performance in the aerobic epoxidation of styrene, achieving a remarkable conversion of 78.11% with 87.31% epoxide selectivity under mild conditions (80 °C, 2 h). Furthermore, the catalyst demonstrates outstanding stability, retaining 68.21% conversion even after 20 reaction cycles, underscoring its superior resistance to metal sintering and long-term durability. This work provides valuable insights into the rational design of multifunctional zeolite catalysts through precise metal positioning and microenvironment modulation. Graphical
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Wu Jing,Rong Jian,Chen Wang-Yi,Wang Chao-Sheng,Feng Chu-Jun,Ao Huai-Sheng,Zhu Cheng-Zhang,Zhang Yu-Zhe,Li Zhong-Yu
Regulating the electronic structure and oxygen-containing intermediates adsorption behavior on Fe-based catalysts is of great significance to cope with the sluggish oxygen reduction reaction (ORR) kinetics, but it still remains a great challenge. In this work, Fe atom clusters (Fe AC ) modified by high-density Cu single atoms (Cu SA ) in a N,S-doped porous carbon substrate (Fe AC /Cu SA @NCS) is reported for enhanced ORR electrocatalysis. Fe AC /Cu SA @NCS exhibits excellent ORR performance with a half-wave potential ( E 1/2 ) of 0.911 V, a high four-electron process selectivity and excellent stability. The ORR performance is also verified in the Fe AC /Cu SA @NCS-based Zn-air battery, which shows a high peak power density of 192.67 mW cm −2 , a higher specific capacity of 808.3 mAh g −1 and impressive charge–discharge cycle stability. Moreover, density functional theory calculations show that Cu single atoms synergistically modulate the electronic structure Fe active atoms in Fe atomic clusters, reducing the energy barrier of the rate-determining step (i.e., * OH desorption) on Fe AC /Cu SA @NCS. This work provides an effective way to regulate the electronic structure of Fe-based catalysts and optimize their electrocatalytic activity based on the introduction of a second metal source. Graphical abstract
✓ 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）