MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-10
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IF 5.3
Feng Lei,Chen Junji,Yang Min,Wang Juan,Yin Shougen,Zhang Deliang,Qin Wenjing,Song Jibin
Ti 3 C 2 T x MXene/Cu x O composites were prepared by acid etching combined with electrochemical technique. The abundant active sites on the surface of MXene greatly increase the loading of Cu x O nanoparticles, and the synergistic effect between the different components of the composite can accelerate the oxidation reaction of glucose. The results indicate that at the working potential of 0.55 V (vs. Ag/AgCl), the glucose sensor based on Ti 3 C 2 T x MXene/Cu x O composite presents large linear concentration ranges from 1 µM to 4.655 mM (sensitivity of 361 µA mM −1 cm −2 ) and from 5.155 mM to 16.155 mM (sensitivity of 133 µA mM −1 cm −2 ). The limit of detection is 0.065 µM. In addition, the sensor effectively avoids the oxidative interference of common interfering species such as ascorbic acid, dopamine and uric acid. The sensor has good reproducibility, stability and acceptable recoveries for the detection of glucose in human sweat sample (97.5-103.3%) with RSD values less than 4%. Based on these excellent properties it has great potential for the detection of glucose in real samples. Graphical abstract
研究领域:
材料科学
·
生物传感
·
电化学分析
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shuang Shu,Hongjun Wang,Xinyan Guo,Yan Wang,Xiaolan Zeng
In this study, a novel Cu-Cu x O/TiO 2 composite photocatalyst was synthesized using combined sol–gel and impregnation methods. Several technologies were employed to characterize the morphology, crystalline structure, optical properties, and surface composition of the as-synthesized photocatalysts . The successful preparation of the Cu-Cu x O/TiO 2 composite was confirmed with superior properties compared to pure TiO 2 and Cu-Cu x O composite. The results for the degradation experiment employing sulfamethazine (SMZ) as the target pollutant indicated that the CT9 (the theoretical molar ratio of Cu(CH 3 COO) 2 to TiO 2 was 9:1) composite exhibits the best photocatalytic performance, and the degradation rate of SMZ reaches 98.2% after 60 min of irradiation. The good repeatability of CT9 was proved by five-cycle experiments. Radicals trapping experiments indicated that superoxide radicals and holes were primary oxidative species in photocatalytic degradation of SMZ. Eleven intermediates for SMZ degradation were identified employing LC-MS technology and the possible degradation pathways were proposed. ECOSAR models were used to predict the biotoxicity of the degradation intermediates. The present research exhibits a new opportunity for the construction of Cu-Cu x O-based photocatalysts to remove contaminants from antibiotic wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Qian Tang,Wen-Li Luo,An-Ni Guo,Yuan Chen,Zhen-Hua Liu,Jing-Wei Shao
Nanozyme heterostructures with extended light absorption into the visible region. • Chlorogenic acid-loaded microneedles enable bidirectional ROS regulation. • Dynamic redox homeostasis promotes M2 polarization and angiogenesis. • The microneedle platform enables synergistic antibacterial and wound-healing therapy. Burn wounds infected with Staphylococcus aureus (S. aureus) are often characterized by excessive early inflammation, which leads to persistent oxidative stress, pain, and delayed healing. To overcome the limitations of conventional photosensitizers, which may induce reactive oxygen species (ROS) overload and subsequent tissue damage, we developed a ROS-responsive microneedle patch (TC@MN). This system consists of chlorogenic acid–based microneedles encapsulating a CuₓO–TiO 2-X (TC) nanozyme heterostructure designed for synergistic antibacterial and regenerative therapy. TC@MN exhibits intrinsic peroxidase-like (POD) and catalase-like activities (CAT). Under light irradiation, these catalytic processes participate in ROS regulation and promote Cu²⁺/Cu⁺ redox cycling, leading to the generation of bactericidal •OH and •O₂⁻ radicals while simultaneously producing O₂ to alleviate local hypoxia. In animal experiments, TC@MN scavenges excess ROS and promotes macrophage polarization toward the M2 phenotype thereby facilitating inflammation resolution and tissue repair under light-free conditions. Collectively, this light/dark dual-mode microneedle platform integrates photocatalytic and enzyme-mimetic functions, offering a biocompatible and intelligent strategy for the treatment of infected burn wounds.
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Liyuan Zhang,Shu Yang,Yuekun Lai,Hui Liu,Yiang Fan,Cao Liu,Haiying Wang,Liyuan Chai
Gaseous Hg 0 is one of the most deadly and hard-to-dispose pollutants. The oxidation of Hg 0 is a promising route, but the rational design and synthesis of highly efficient catalysts still remain grand challenges. Herein, CuO@Cu 2 O (or Cu x O) heterostructured nanoparticles uniformly monodispersing on porous carbon monolith were designed and successfully synthesized using oligo( m -phenylenediamine)-Cu 2+ complex as raw material. The Cu x O-carbon catalyst contains ∼28 wt% of Cu. Based on density functional theory calculation, the CuO@Cu 2 O junction interfaces can accelerate the Hg 0 oxidation by significantly reducing the energy barriers of reaction. Only 1 mg of the catalyst can catalyze the oxidation of more than 90 % of Hg 0 with [HCl] = 0.5 ppm, [O 2 ] = 6 vol%, T = 150 °C. The poisoning effect of either SO 2 or H 2 O on the catalysts is weak. Moreover, a long-term test confirmed that the Hg 0 oxidation rate can maintain more than 90 % even in the co-presence of SO 2 (5000 ppm) and H 2 O (10 vol%).
研究领域:
环境催化
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材料化学
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大气污染控制
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纳米材料
·
表面科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）