SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Xing Gao,Weiying Feng,Hanxiao Zhang,Nanyan Weng,Shouliang Huo
Harmful cyanobacterial blooms in eutrophic water bodies have frequently occurred worldwide and become a major environmental concern. Therefore, it is imperative to develop a stable and efficient algaecide to solve this issue. In this study, our purpose was to investigate the efficacy and mechanism of a newly developed Cu 2+ doped Fe 3 O 4 @Biochar magnetic composite (Cu-Mag-BC) in in-situ inactivation of Microcystis aeruginosa ( M. aeruginosa ) . We successfully synthesized the Cu-Mag-BC by coating Cu 2+ onto Fe 3 O 4 @Biochar. Cu-Mag-BC exhibited superparamagnetic behavior and was uniformly impregnated by Cu 2+ . Cu-Mag-BC (5 mg/L), rapidly inactivated chlorophyll-a (Chl-a) in M. aeruginosa with low Fe and Cu leaching, during which time the OD 264 value and malondialdehyde (MDA) content increased, while the activities of superoxide dismutase (SOD) and catalase (CAT) first increased and then decreased, due to oxidative stress induced by over-generated reactive oxygen species (ROS). Quantitative results showed that ·O 2 − and ·OH were the main ROS species produced from Cu-Mag-BC. Inactivation efficiency was maintained at approximately 80 % after three consecutive runs and total Chl-a removal efficiency reached 2.84 g/g, indicating good reusability and stability. A possible inactivation mechanism is proposed; amino groups and adipose chain were the primary oxidation sites. Thus, Cu-Mag-BC shows potential as a candidate for simultaneously inactivating harmful cyanobacteria and preventing secondary pollution.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 8
·535-539
·
IF 0.975
Hongguang Zhang,Meng Wang,Feng Xu
Developing cheap photocatalysts with highly visible-light activity is greatly desired for environmental pollution treatment. In this work, the authors designed and synthesised Cu 2+ -doped TiO 2 (Cu-TiO 2 ) hollow spheres with enhanced photocatalytic activity and antimicrobial activity using a simple hydrothermal process. The X-ray powder diffraction (XRD) results revealed that Cu-TiO 2 hollow spheres were anatase crystal phase. The Cu 2+ -doped into TiO 2 can be confirmed by XRD, Raman spectra, and UV–Vis spectrum. The photocatalytic activity of Cu-TiO 2 samples was evaluated by the degradation of methyl orange. Comparing to the undoped TiO 2 , 6% Cu-TiO 2 sample exhibited remarkably high photocatalytic towards methyl orange under simulated sunlight irradiation, which was attributed to the fact that copper ion doping produced numerous oxygen vacancies (V O ) in the material. In addition, it also showed improved antibacterial properties against both Gram-positive Staphylococcus aureus ( S.aureus ) and Gram-negative Escherichia coli ( E.coli ) bacteria. These results establish that Cu 2+ doping can obviously improve the photocatalytic performance of TiO 2 under simulated sunlight.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Liang Liang,Yulong Ye,Heyi Yang,Qinan Mao,Yang Ding,Fang Chen,Meijiao Liu,Jiasong Zhong
Tunable long persistent luminescence (LPL) phosphor materials have great potential for optoelectronic cryptographic applications. However, the mainstream techniques of modulating LPL generally have the characteristics of complex preparation processes, demanding crystal field environments, or expensive dopant ions, which restrict large-scale commercial application. Herein, we develop a simple, high-efficiency, and low-cost strategy to optimize the LPL of LiGaO2(LGO):Cu2+ by changing the sintering time to regulate the degree of crystal structure distortion. The Cu2+ as charge compensation will substantially enhance the emission intensity of LGO by a factor of 11.02 originating from the appropriate ionic size and coordination mode. Besides, the LPL time of LGO:Cu2+ can be extended effectively to 2 h by adjusting the sintering temperature and time (900 °C@24 h). The extension mechanism is that Li and Ga can be substituted for each other more easily and induce crystal structure distortion due to the special crystal structure of LGO, resulting in an optimal trap concentration in LGO:Cu2+. Thus, our findings provide a simple way to modulate long persistent luminescence and further consider their potential impact on optical information encryption.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yida Huang,Youlong Liang,Chaoran Xie,Qingyuan Gui,Jinlei Ma,Hongxian Pan,Zeyu Tian,Lei Qi,Mei Yang
Ce1–xO2:x%Cu2+ nanobelts were bioinspired, designed, and fabricated using commercial filter papers as scaffolds by adding Cu(NO3)2 in the original sol solution of CeO2 nanobelts, which display excellent catalyst properties for CO oxidation and photocatalytic activity for organic dyes. Compared with pure CeO2, CuO belts were synthesized using the same method and the corresponding Ce0.5O2:50%Cu2+ bulk materials were synthesized without filter paper as scaffolds; the synthesized Ce1–xO2:x%Cu2+ nanobelts, especially Ce0.5O2:50%Cu2+ nanobelts, can decrease the reaction temperature of CO to CO2 at 100 °C with the conversion rate of 100%, much lower than the formerly reported kinds of Ce1–xO2:x%Cu2+ catalysts. Meanwhile, the synthesized Ce1–xO2:x%Cu2+ nanobelts also display better photocatalytic activity for organic dyes. All of these results provide useful information for the potential applications of the synthesized Ce1–xO2:x%Cu2+ nanobelts in catalyst fields.
研究领域:
材料科学
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环境科学
·
催化化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Caiyan Yu,Linying Yang,Shuwei Sun,Di Chen,Yanfeng Yin,Hui Ying Yang,Ying Bai
Due to their high theoretical specific capacities and good structural compatibility, O3-layered oxides are considered as high-performance cathode candidates for sodium-ion batteries. However, serious side reactions and structural degradation during long-term cycling have greatly hindered their practical applications. Herein, O3-type NaNi 0.5 Mn 0.5 O 2 (NNMO) was prepared by partially substituting Ni 2+ with Cu 2+ and inducing CuO surface coating to enhance the structural stability without sacrificing the high capacity. In Particular, Cu 2+ incorporated at a molar ratio of 0.10 greatly improved the electrochemical performance of pristine NNMO. The NaMn 0.5 Ni 0.4 Cu 0.1 O 2 electrode exhibited a capacity retention of 64.5% after 300 cycles at 0.5 C. Microscopic and spectral studies revealed that the CuO coating layer suppressed detrimental side reactions upon cycling. Moreover, the bulk doping of Cu 2+ ultimately enhanced the structural stability by mitigating irreversible phase transitions. Hence, the integration of bulk Cu 2+ doping and CuO surface coating contributed to the increased structural stability and electrochemical performance of NNMO. The doping and coating dual-modification strategy established in this work effectively suppressed the side reactions and structural degradation of NNMO, and this work provides new insight into the effective design of electrode microstructures for use in high-performance batteries.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
TALANTA
·
2017
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IF 4.162
Bing Zhang,Xue Wang,Yanling Zhao,Jia Lv,Hongyun Meng,Honghong Chang,Hui Zhang,Wenlong Wei
Visual detection of tumor markers with accuracy and selectivity exhibits significant advantages for cancer early diagnosis due to its low-cost and simple analytical instruments. Herein, a highly photosensitive colorimetric immunoassay for carcino embryonie antigen (CEA, as a model) detection based on Cu 2+ doped Ag-AgI nanocomposite was constructed. First, Cu 2+ doped Ag-AgI nanocomposite (Cu 2+ /Ag-AgI) owned the ability of oxidization of TMB was synthesized by impregnation method, which was characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray powder diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). Second, based on sandwich-type immunoassay, the immunocomplex was built on the surface of magnetic bead by utilizing Cu 2+ /Ag-AgI as labels. The blue color of TMB ox was obtained under visible irradiation and ultraviolet spectrum scanning was carried out in ABS buffer solution. Under optimal conditions, the absorbance values increased with the increasing of CEA concentrations in sample with the linearity range of 1.0 pg mL −1 −5.0 ng mL −1 . The detection limit was 0.13 pg mL −1 . More importantly, the developed colorimetric immunoassay exhibited good selectivity, repeatability, stability and possible applications in the real serum sample analysis.
研究领域:
生物医学工程
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
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IF 10.588
Zeqing Long,Hongliang Wang,Kaiwen Huang,Guangming Zhang,Haijiao Xie
Photocatalytic oxidation of contaminants in water has recently gained extensive attentions. In this study, Cu 2+ - doped BiOCl microsphere photocatalysts were prepared using solvothermal method. The effects of Cu 2+ doping ratio on the morphological structures and photoelectric and photocatalytic properties of BiOCl were studied in detail. Results showed that Cu 2+ doping affected the particle size of BiOCl microspheres. The introduction of Cu 2+ ions gradually increased the light absorption range and decreased the electron recombination rate of photocatalysts as shown by ultraviolet-visible diffuse reflection and photoluminescence spectra. The best doping ratio was 0.25 Cu 2+ -BiOCl, showing the highest photocatalytic activity for rhodamine B (14.25 time higher than BiOCl) and a good inhibition of algal growth. The main reactants in the photocatalytic system were·OH and h + (electron holes). Density functional theory (DFT) calculations further demonstrated that the doping of Cu 2+ ions made the photogenerated carriers in BiOCl easier to generate and ensured the charge was transferred more rapidly. In conclusion, a novel high-efficiency multifunctional photocatalyst is proposed for the efficient organic pollutants removal and algae growth inhibition from water.
研究领域:
环境科学
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材料科学
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生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Xiaohui Wu,Qin Zhang,Fangyi Huang,Xingyu Huo,Fuyu Li,Yuanxun Li,Hua Su
New low loss and low-sintering temperature co-fired Ba 3- x Cu x Ti 4 Nb 4 O 21 (BCTN, 0 ≤ x ≤ 0.12) ceramics with 0.60 wt % Li 2 O-B 2 O 3 -SiO 2 -CaO-Al 2 O 3 (LBSCA) glass were prepared by solid-state reaction methodology. This work showed that CuO and LBSCA were effective sintering aid, which improved the densification and decreased sintering temperature . Thus, the excellent microwave dielectric properties of BCTN ceramics ( x = 0.08) were obtained after sintering at 925 ℃ with ε r ~ 44.18, Q× f ~ 17,860 GHz (@ 5.6 GHz) and τ f ~ 94.76 ppm/℃. Q× f value was increased nearly 3-fold compared to pure BTN ceramics (~ 6090 GHz). Based on the P-V-L bond theory, the Ti-O and Nb-O bonds together contributed greatly to ε r . The Nb-O bonds was the main factor affecting the internal loss on Q× f . The τ f closely related to the oxygen octahedron [Ti1/Nb1O 6 ]. The BCTN ceramics would not react with Ag electrodes, and had great potential to be used in LTCC microwave devices.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 15
·8430-8436
·
IF 3.361
Ronghua Wu,Zhongchen Bai,Jinguo Jiang,Heng Yao,Shuijie Qin
CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) and Cu2+-doped CsPbCl3 QDs with different Cu-to-Pb molar ratios were synthesized via a solvent-based thermal synthesis method. The photoluminescence (PL) properties of these Cu2+-doped CsPbCl3 QDs were also investigated in this study. The results showed that with the increase in the Cl− concentration the surface defects of CsPb(Cl/Br)3 QDs increased, which resulted in an increase in the non-radiative recombination of excitons and weakened the PL intensity. Moreover, Cu2+-doped CsPbCl3 QDs maintained the cubic crystal structure of the initial phases. Owing to the doping of Cu2+ ions, the surface defects of CsPbCl3 QDs were effectively eliminated, which facilitated the excitonic recombination via a radiative pathway. The PL quantum yields (PLQYs) of Cu2+-doped CsPbCl3 QDs were increased to 51%, showing great photostability. From the results, it is believed that Cu:CsPbCl3 QDs can be widely used in optoelectronic devices.
研究领域:
材料科学
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纳米技术
·
光电
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiuyu Chen,Zhiwen Liu,Baozhong Zhu,Chensheng Gao,Yunlan Sun
Radioactive iodine (I) produced in the nuclear industry can be eliminated through solid-phase adsorption. Nevertheless, conventional adsorbents suffer from limited capacity, poor selectivity, and insufficient stability. In this study, metallic copper modified nitrogen-doped carbon composites (Cu x -NC) were prepared from a pre-synthesized template of Cu 2+ -zeolite imidazole framework-8 (Cu 2+ -ZIF-8) by ball milling combined with pyrolysis processes. The surface physical and chemical properties of Cu x -NC composites were characterized, and then applied to remove iodide (I - ) in aqueous solutions. The experimental results indicated that Cu 0 introduced to nitrogen-doped carbon not only significantly enhanced I - removal but also achieved an exceptional adsorption capacity of 269.2 mg/g by incorporating 35 % copper and setting the pyrolysis temperature at 1000 °C. Notably, under acidic (pH = 3) and blown air conditions, the adsorption capacity was markedly increased, attaining 383.3 and 474.3 mg/g, respectively. The Cu 35 -NC demonstrated exceptional selectivity for I - in the presence of interfering anions such as Cl - and SO 4 2- . Mechanism studies showed that as-fabricated materials eliminated I - through adsorption and oxidation. The presence of Cu 0 particles activated molecular oxygen to release Cu + and generate H 2 O 2 , resulting in I - being adsorbed and oxidized. These findings underscore the significant potential of the economical Cu x -NC for the effective elimination of radioactive iodide.
研究领域:
环境科学
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材料科学
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核工程
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 23
·27576-27586
·
IF 2.478
Xue Manling,Liu Xingbin,Wu Hao,Yu Bo,Meng Fanming
Cu 2+ -doped CeO 2 @mSiO 2 (CDC@mSiO 2 ) samples with hollow structure were prepared by calcining Cu 2+ -doped cerium-based metal–organic framework (UiO-66 nanocrystals) precursor coated with mesoporous silica (mSiO 2 ). BET analysis shows that Cu 2+ -doped CeO 2 @mSiO 2 has a mesoporous structure and a large specific surface area (397.7 m 2 /g), which can provide more active sites for photocatalytic reactions. Ultraviolet absorption spectrum and PL spectrum show that the introduction of Cu 2+ makes the absorption edge of the sample red-shift and accelerate the electron–hole separation efficiency. Cu 2+ doping makes CeO 2 produce more oxygen vacancies, which promotes photocatalysis. The Cu 2+ -doped CeO 2 @mSiO 2 sample has the best photodegradation efficiency. Under simulated sunlight, the degradation rate of methyl orange within 2 h is 92.6%, and the photocatalytic rate constant is 0.0221/min. After 4 cycles of experiments, it still has excellent photocatalytic activity. Based on the characterization analysis and experimental results, the degradation mechanism of methyl orange is proposed.
研究领域:
材料科学
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纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 52
·期 1
·412-419
·
IF 5.6
Jian Lan,Aihua Zhou,Yi Zhang,Yuanxue Cai,Chengguo Ming
To overcome the limitations of static fluorescent anti-counterfeiting, this study proposes a dynamic encryption method based on the afterglow of materials. Through defect engineering, Cu 2+ single-doped and Cu 2+ /Al 3+ co-doped NaGaO 2 (NGO) phosphors were synthesized. The doping of Al 3+ enhances the yellow emission at 610 nm through lattice distortion and defect optimization, while effectively modulating the decay kinetics of Cu 2+ . Millisecond-level lifetime differences were achieved under same-color emission, enabling temporal information encryption. This approach breaks the conventional reliance on multi-color systems and realizes dual-dimensional encoding in both color and time, offering a high-capacity, counterfeit-resistant anti-counterfeiting strategy.
研究领域:
材料科学
·
光学材料
·
固态化学
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防伪技术
·
光致发光
✓ 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）