CONSTRUCTION AND BUILDING MATERIALS
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2024
·
IF 7.4
Lin Wang,Hongqiang Chu,Jiaxuan Xie,Mingzhi Guo,Linhua Jiang,Xiang Xi,Yi Fang,Wei Zhao
Concrete corrosion in wastewater pipelines is caused by biogenic sulfuric acid produced locally by sulfur-oxidizing microorganisms. Concrete mixtures are commonly modified to prevent this form of corrosion by adding biocides to inhibit their biological activities. However, using biocides is not always desirable because of their limited lifespan and potential for leaching into the environment. Therefore, there is a need to develop more durable alternatives to prevent microbial-induced corrosion of concrete. In this study, three types of Cu-Ti amorphous alloys (Cu 35 Ti 65 , Cu 50 Ti 50, and Cu 65 Ti 35 ) were prepared by ball milling, and compared with commercially available TiO 2 nanoparticles to assess their effects on the resistance of the microbial-induced corrosion performance of mortar. Detailed investigations were conducted on the appearance, mechanical properties, and corrosion depth of mortars at various exposure durations in an accelerated biocorrosion environment. The results revealed that the mortars mixed with Cu 35 Ti 65 , Cu 50 Ti 50 , Cu 65 Ti 35 , and TiO 2 nanoparticles exhibited significantly better resistance to microbial-induced corrosion than the reference mortars. The resistance to microbial-induced corrosion of the mortar mixed with Cu 50 Ti 50 was the best. The superior antimicrobial corrosion performance of the mortar containing Cu-Ti amorphous alloy is influenced by both smaller particle sizes and higher sterilization performance. These findings can contribute to the development of novel applications of amorphous alloys in functional concrete.
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Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xueqian Wu,Zhen Li,Jiangyan Tao,Jin Zhao,Yufei Xie,Songjian Zhao
The discharge of colorless and water-soluble formaldehyde (FA) wastewater poses a serious threat to human health. In this study, copper based Fenton-like catalyst Cu x S y was innovatively introduced into the FA degradation system. Cu x S y catalysts with different morphologies were regulated by ethylenediamine . The Cu 7 S 4 catalyst exhibited 99% degradation performance towards FA. The physical and chemical properties of catalysts indicate that the Cu 7 S 4 catalyst has a beautiful dendritic snowflake like structure, which is more conducive to the adsorption and degradation process of FA. Electron paramagnetic resonance (EPR) detected an obvious Cu defect (g=2.064) in Cu 7 S 4 , which can effectively activate H 2 O 2 and stimulate the generation of •OH, thus accelerating the degradation of FA. Compared with Fenton reagent, Cu 7 S 4 shows more than 75% FA degradation performance (pH=5 and pH=9). Further research showed that the H 2 O 2 :Cu 7 S 4 ratio of 2:10 showed a 95% degradation effect on FA at 200–1000 ppm, demonstrating a more efficient and stable FA degradation ability. Moreover, the mechanism of FA degradation was analyzed.
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JOURNAL OF MOLECULAR STRUCTURE
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2025
·
IF 4.7
Zhijiang Rong,Wei Guo,Haotian Liang,Huan Lv,Hua Guo,Yi Zhang,Bo Zhang,Chunyan Hao,Xianjun Liu,Hongyan Sun,Yifan Gao
Biological metal ions play crucial roles in various life processes and exhibit diverse biological functions. Specifically, Ca(II), Mg(II), Cu(II), and Mn (II) ions are intricately involved in insulin function. To further clarify the biological functions of biological metal ions on insulin, the interaction mechanism of insulin affected by Ca(II), Mg(II), Cu(II), and Mn (II) ions were comparably investigated via spectroscopic, circular dichroism(CD), and electrochemical approaches. Electrochemical studies demonstrate that Mn(II) forms an M 2 L-type complex with insulin, exhibiting a binding constant of β Mn = 9.3 × 10 9 , while Cu(II) and insulin form an M 4 L-type complex with a significantly higher binding constant of β Cu =9.18 × 10 12 . Electrochemical investigation of the interaction between Ca(II) and Mg(II) with insulin adsorbed onto a glass carbon electrode surface revealed that the presence of Ca(II) and Mg(II) induced conformational changes in insulin, resulting in reduced adsorption capacity. Additionally, it was observed that the presence of Ca(II) and Mg(II) enhanced the redox signal of probe ions. The binding constants values were calculated to be 1.108 × 10 3 L•mol –1 for the insulin-Ca(II) system and 2.28 ×10 2 L• mol –1 for the insulin-Mg(II) system. Spectroscopic studies showed that the binding of Cu(II) ions to insulin molecules may be controlled by chelation mechanism, and the interaction between Cu(II) ions and insulin molecules may occur in the aromatic region. Mn(II) ion binding is mainly controlled by ionic interactions, and its binding site is far away from the aromatic region.The combination of Ca(II) and Mg(II) with insulin induced a small enhancement in the Ultraviolet-visible (UV) absorption peak, with Ca(II) exhibiting a more pronounced effect compared to Mg(II). The results of spectral, CD and electrochemical studies are consistent.
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ENVIRONMENTAL POLLUTION
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2024
·
IF 7.6
Yaoyu Zhou,Jianlong Wang
Electro-Fenton (EF) can in-situ produce H 2 O 2 and effectively activate H 2 O 2 to generate powerful reactive species for the destruction of contaminants under acidic conditions, however, the production of iron-containing sludge and requirement of low working pH significantly hinder its practical application. Herein, a novel Cu, N co-doped carbon (Cu–N@C) with metal organic framework (MOF) as a precursor was constructed and adopted for the elimination of pefloxacin (PEF) in the heterogeneous electro-Fenton (HEF) process. PEF could be almost completely removed within 1 h and total organic carbon (TOC) removal efficiency was 48.57% within 6 h. Meanwhile, Cu–N@C had good repeatability and environmental adaptability, it can still maintain excellent catalytic performance after 10 cycles, and it exhibited satisfactory remediation performance in simulated water matrix. In addition, the HEF process catalyzed by Cu–N@C also showed satisfactory degradation effect on other organic pollutants including atrazine, methylene blue, and chlorotetracycline. Under the action of impressed current, the HEF system could generate H 2 O 2 in-situ, and the active species could be generated in the redox cycle of Cu 0 /Cu 1+ /Cu 2+ . Electron paramagnetic resonance and quenching experiments confirmed that •OH was the dominant active species in the degradation of organic compounds. The degradation process of PEF was studied by mass spectrometry analysis of intermediate products. This study provided a simple method to prepare MOF-based electrocatalyst , which exhibits promising application potential for treatment wastewater .
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-22
·
IF 14.7
Bai Mingru,Wang Ting,Xing Zhenyu,Huang Haoju,Wu Xizheng,Adeli Mohsen,Wang Mao,Han Xianglong,Ye Ling,Cheng Chong
The clinical treatments of maxillofacial bone defects pose significant challenges due to complex microenvironments, including severe inflammation, high levels of reactive oxygen species (ROS), and potential bacterial infection. Herein, we propose the de novo design of an efficient, versatile, and precise electron-donable heterojunction with synergetic Ru-Cu pair sites (Ru-Cu/EDHJ) for superior biocatalytic regeneration of inflammatory mandible defects and pH-controlled antibacterial therapies. Our studies demonstrate that the unique structure of Ru-Cu/EDHJ enhances the electron density of Ru atoms and optimizes the binding strength of oxygen species, thus improving enzyme-like catalytic performance. Strikingly, this biocompatible Ru-Cu/EDHJ can efficiently switch between ROS scavenging in neutral media and ROS generation in acidic media, thus simultaneously exhibiting superior repair functions and bioadaptive antibacterial properties in treating mandible defects in male mice. We believe synthesizing such biocatalytic heterojunctions with exceptional enzyme-like capabilities will offer a promising pathway for engineering ROS biocatalytic materials to treat trauma, tumors, or infection-caused maxillofacial bone defects.
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Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Fangfang Chang,Zihan Lin,Yongpeng Liu,Qing Zhang,Xiaolei Wang,Zhengyu Bai
The ability to adjust the composition and surface structure of Cu-based nanomaterials is important for designing catalysts to effectively convert CO2 into multi-carbon products via electrocatalytic reduction. Herein we report a potential-driven in situ forming Cu/Cu2O catalyst featuring interface and tensile strain characteristics from the partial reduction of Cu2O nanocubes for electrocatalytic enhancement of the electrochemical CO2 reduction reaction (CO2RR). The results revealed interesting catalytic relationships between Cu+–Cu0 compositions and tensile strain, exhibiting maximum faradaic efficiencies for C2 products in the H-type cell at a Cu0 : Cu+ ratio of ∼46 : 54. As revealed by operando X-ray diffraction analysis, Cu/Cu2O in this ratio exhibits a clear tensile strain in Cu during the CO2RR. The outstanding performance of this composition is attributed to the tensile strain and interface of the surface, in addition to the composition synergy due to the Cu0 sites decorating the surface in an electron-rich state and being conducive to CO2 adsorption and activation and the Cu+ sites enhancing the carbon–carbon coupling to adsorbed *CO, which were also supported by density functional theory (DFT) calculations and in situ ATR-FTIR. The findings open up a new pathway for the rational design of Cu-based catalysts with enhanced activity and selectivity to boost the CO2RR.
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INORGANIC CHEMISTRY
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2024
·
IF 4.3
Jie Hou,Jun Chen,Cheng Luo,Juntao Li,Cheng Li,Ruiling Zhang,Jianyong Liu,Peigeng Han
Zero-dimensional (0D) metal halides have emerged as excellent luminescent materials for optical and optoelectronic applications. Especially environmentally friendly ternary zinc halides have recently drawn increasing attention. Herein, we present the codoping of Cu+ and Mn2+ ions into 0D Cs2ZnBr4 single crystals (SCs), which show bright PL emission and high stability. Adjusting the Cu+/Mn2+ ratio can make the photoluminescence quantum yield (PLQY) exceed 90%, which is much higher than that of the single-ion doped sample. The efficient PL is determined by a combination of Cu+–Mn2+ competitive interaction, Cu+–Mn2+ energy transfer, and Cu+–Mn2+ synergistic passivation. More interestingly, the codoped sample shows a better scintillation performance with a low detection limit of 52 nGyair/s and a sensitive spatial resolution of 13.2 lp/mm. We further explore the promising applications of Cu+–Mn2+-codoped Cs2ZnBr4 SCs for anticounterfeiting and X-ray imaging. These results not only help to grasp the excited-state photophysical processes of 0D codoped metal halides but also provide a new way for the design and development of environmentally friendly luminescent materials.
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BULLETIN OF MATERIALS SCIENCE
·
2025
·Vol. 48
·期 1
·1-9
·
IF 2.1
Qi Wenqian,Deng Bo,Mao Hui
Despite the low levels of copper ions in aquatic environments, excessive concentrations of copper ions can eventually cause serious harm to animals and humans as they are biologically enriched and ecologically cycled. Herein, an appropriate and selective separating material for copper ions with low concentrations needs to be developed. In the present work, bayberry tannin-modified chitosan fibres (TMF) were fabricated for selective removal of Cu 2+ . The adjacent phenolic hydroxyl groups at the B ring of tannin enable them to chelate with heavy metal ions, while the fibre structure of chitosan is conducive to the extended distribution of the active sites. It showed an adsorption capacity of 14.98 mg g –1 for Cu 2+ at 303 K, which was higher than that of most conventional adsorbents and activated carbon. Moreover, in the presence of co-existing heavy metal ions, including Ni 2+ , Cd 2+ , Fe 3+ and Cr 3+ , we found that TMF showed highly selective adsorption of Cu 2+ , with Cu 2+ concentrations as low as 5 mg l –1 . The TMF can be robustly recycled through acid treatment with 96.6% desorption efficiency.
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CHINESE JOURNAL OF CHEMISTRY
·
2024
·Vol. 42
·期 24
·3201-3210
·
IF 5.5
Zhou Zhong,Xiang-Ji Liu,Li Ma,Zi-Jian Zhan,Yu-Xin Yuan,Heng-Jian Zhang,Feng-Ying Cai,Yi-Dong Hou,Jian Lü,Rong Cao
Comprehensive Summary Electron transfer is an important way to activate persulfate. Currently, the electrons for persulfate activation mainly originate from organic contaminants or the catalyst itself, which can lead to selective activation of persulfate or oxidation of the catalyst, respectively, and thus become a bottleneck restricting its application. In this work, Cu−doped FeVO 4 (Cu−FVO) was prepared, and the results showed that Cu doping can significantly improve the photocatalytic activity and stability of FVO for peroxymonosulfate (PMS) activation. The optimized Cu−FVO/PMS/light system exhibited a high BPA degradation rate that is 4.3 times higher than that of the FVO/PMS/light. This system manifested a broad applicability to various organic contaminants even with complex matrix. Photoelectrochemical analysis and DFT theoretical calculations revealed that Cu doping boosted the photogenerated charge separation and the adsorption of PMS on FVO. Furthermore, Cu doping led to the establishment of an electron transfer channel from Cu−FVO to PMS, through which photogenerated electrons achieved an efficient PMS activation. Meanwhile, holes were consumed by organic contaminants to avoid the oxidation of catalyst. These collectively enhanced the photocatalytic activity and stability of Cu−FVO, which also maintained high catalytic activity even after 20 cycling degradation reactions.
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RSC Advances
·
2024
·Vol. 14
·期 7
·4861-4870
·
IF 3.9
Yibo Zhao,Yueyang Li,Lu Chang,Wenjing He,Keling Liu,Minjie Cui,Shengnan Wang,Yujia Zhao,Xinyu Tan
Bimetal doped Cu–Fe-zeolitic imidazole framework-8 (ZIF-8)/graphitic carbon nitride (GCN) (Cu–Fe-ZIF-8/GCN) nanocomposites were prepared via one-pot and ion-exchange methods. The main influencing factors, such as adsorbent concentration, TC concentration, initial pH, and coexisting ions, were evaluated in detail. Due to the suitable pore structures and the presence of multiple interactions on the surface, the nanocomposite showed a high adsorption capacity up to 932 mg g−1 for tetracycline hydrochloride (TC), outperforming ZIF-8 by 4.8 times. The adsorption kinetics and adsorption isotherm were depicted in good detail using pseudo-second-order kinetic and Langmuir models, respectively. Thermodynamic calculation revealed that the adsorption of the nanocomposite under experimental conditions was a spontaneous heat absorption process, and was primarily driven by chemisorption. After four cycles of use, the nanocomposite retained 87.2% of its initial adsorption capacity, confirming its high reusability and broad application prospects in removing tetracycline-type pollutants from wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Hong Gao,Chen Wang,Wenqi Zhang,Guowei Shan,Weixing Li
Purification of glutathione (GSH) from fermentation broth is crucial for production process. Here, we built a new nanofiltration (NF) membrane to separate glutathione from amino acids, which mainly refer to glutamate (Glu) and glycine (Gly). An alendronic acid (AA)/Cu-MOF-74 nanorods arrayed interlayer is constructed on the substrate. The designed interlayer can adsorb a significant amount of piperazine (PIP), enhancing the reaction crosslinking degree of interfacial polymerization. The Cu-MOF-74 morphology contributes a wrinkled membrane surface structure with large specific surface area. The optimal NF membrane achieved the permeability of 7.13 L·m −2 ·h −1 ·bar −1 with high selective separation factor of 20.06, 25.88, 25.46 for GSH/Glu, GSH/Gly and GSH/NaCl, respectively. This work offers a potential solution to develop high-performance NF membranes for purification of biological molecules.
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Haolin Sun,Xiaoyu Zhang,Hainan Ma,Lina Zhang,Yang Zhang,Ruimeng Sun,Haoran Zheng,Han Wang,Jiayu Guo,Yanqi Liu,Yurou wang,Yanfei Qi
Rapid and sensitive detection of pathogenic bacteria is crucial for disease prevention and control. The CRISPR/Cas12a system with the DNA cleavage capability holds promise in pathogenic bacteria diagnosis. However, the sensitivity of CRISPR-based assays remains a challenge. Herein, we report a versatile and sensitive pathogen sensing platform (HTCas12a) based on the CRISPR/Cas12a system, hybridization chain reaction (HCR) and Poly T-copper fluorescence nanoprobe . The sensitivity is improved by HCR and the Poly-T-Cu reporter probe reduces the overall experiment cost to less than one dollar per sample. Our results demonstrate the specific recognition of target nucleic acid fragments from other pathogens. Furthermore, a good linear correlation between fluorescence intensity and target quantities were achieved with detection limits of 23.36 fM for Target DNA and 4.17 CFU/mL for S.aureus , respectively. The HTCas12a system offers a universal platform for pathogen detection in various fields, including environmental monitoring, clinical diagnosis, and food safety.
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