MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Fang Li,Nuotong Shen,Qingcheng Li,Chen Yang,Limin Zhang,Mingjin Wang
The development of microfluidic flow injection analysis (FIA) system for simultaneous and real-time detection of multiple metal ions is of great importance for environmental monitoring, food safety and industrial field. In this work, a multiplexed microfluidic chip based FIA system was fabricated for simultaneous determination of three metal ions, by using Fe(III), Mn(II) and Cu(II) as models. The multiplexed microfluidic chip based FIA system is composed of three parts, including a multi-channel FIA system for solution manipulation, a group of microfluidic chips for reagents mixing and reaction, and one fiber optic spectrometer for fast and real-time absorbance signal detection. The sample solution and chromogenic reagents were injected into the microfluidic chips to carry out specific colorimetric reactions. Fe(III), Mn(II) and Cu(II) reacts with 5-sulfosalicylic acid, formaldoxime, and bis(cyclohexanone) oxalyldihydrazone, respectively, to generate orange, ember and blue colored solution with peak absorbance at 420 nm, 450 nm, and 600 nm, respectively. The absorbance signal of the generated three channels of solution can be sequentially detected by using only one mini spectrometer. The linear detection range for Fe(III), Mn(II) and Cu(II) is 0.1–20 mg/L, 0.1–12 mg/L and 0.2–12 mg/L, respectively. The limit of detection for Fe(III), Mn(II) and Cu(II) is 0.07, 0.02 and 0.1 mg/L respectively. And the limit of quantification for Fe(III), Mn(II) and Cu(II) is 0.2, 0.07 and 0.3 mg/L, respectively. The recoveries of spiked Fe (III), Mn (II), and Cu (II) in real water samples are between 95.3 % to 106 %. Finally, the developed microfluidic chip based FIA system was successfully applied to simultaneous determination of three metal ions in environmental water samples and zinc smelting solution from zinc hydrometallurgy industry with satisfied results.
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APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Kailin He,Shunli Zeng
CuMn, CuMnCe, and CuCe metal oxide catalysts were prepared and applied in oxidizing CO and benzene as representative volatile organic compounds (VOCs). Various characterization methods and in situ diffuse reflectance infrared Fourier transform spectra (DRIFTS) were used to explore mutual effects between CO and benzene oxidation and the role of reactive oxygen species. CuMn shows the highest activity in independent and simultaneous oxidation of CO and benzene due to its spinel Cu 1.5 Mn 1.5 O 4 structure, which gives abundant Cu + sites, acidic sites, O α , and O β . Cu + sites and O α benefit CO oxidation, while acidic sites, O α , and O β contribute to benzene oxidation, producing intermediates decomposable at low temperatures. Mechanism study reveals that benzene inhibits CO oxidation by competing for O α at low temperatures to retard carbonate intermediates formation. CO enhances benzene oxidation by promoting benzene preliminary oxidation and intermediates deep degradation. On CuMn, the formation and degradation of maleate and acetate are facilitated, while maleate and formate degradation are promoted on CuMnCe and CuCe, respectively.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Liuyan Wei,Ying Yang,Hailin Zhang,Huisha Huang,Xiaotong Zhang,Dandan Hou,Chujun Qin,Suxuan Liao,Zhiheng Su,Mei Li
Monitoring uric acid (UA) level in body fluids is of great significance for clinical diagnosis and treatment of related diseases. Herein, we introduce a simple smartphone-assisted colorimetric sensing platform for detection of UA. The experiment exhibited that the peroxidase-like activity of copper-doped Prussian blue (CuPB) could be enhanced by the doping of Cu element on Prussian blue. CuPB displayed excellent peroxidase-like activity and efficiently catalyze the oxidation of 2,2-diazo-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) in the presence of H 2 O 2 to generate a colored radical cation ABTS + , resulting in a absorbance and color-based RGB intensity dual signal output. Hence, a reliable colorimetric and color-based-smartphone assay for detection of UA was constructed based on CuPB-mediated the peroxidase-like activity and UA-trigged inhibition of the ABTS oxidation reaction catalyzed by CuPB. The color change is collected by the built-in camera of smartphone, and the RGB intensity of sample images was processed by Image J. The sensing platform was used for highly sensitive colorimetric and portable detection of UA in human urine within 6 min with a wide range of linear response from 0.1 to 80 μM, a limit of quantitation of 0.10 μM and a low limit of detection of 0.041 μM (3σ rule). This work demonstrates a novel and versatile strategy to develop superior peroxidase mimics and holds great potential for rapid and portable detection of UA in urine, healthcare and clinical diagnosis, and also open promising avenues for the nursing point detection of UA.
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PubMed
高影响因子
Materials Today Communications
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2025
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IF 4.5
Tingxu Gao,Yuping Le,Yingjie Pan,Yongkang Wang,Chenyang Liu,Jinkun Liu,Li Wan,Tao Shen,Yan Zhu
The growing demand for flexible electronics necessitates low-temperature conductive pastes, yet silver-based solutions face limitations from high costs and electromigration risks. Copper@silver nanoparticles (Cu@Ag NPs), combining copper's cost benefits with silver's oxidation resistance, present a viable strategy, though their sintering mechanisms and paste performance optimization still require deeper exploration. This study investigates the sintering behavior of Cu@Ag NPs through integrated molecular dynamics (MD) simulations and experimental synthesis. MD results revealed the sintering temperature of Cu@Ag NPs is lower than those of Ag NPs and Cu NPs, the calculated value of 690 K (416.85 °C) was consistent with experimentally determined 412.8 °C through chemically reduced nanoproducts, both indicated Cu@Ag NPs owned a low-temperature sintering characteristic. The optimization of the Ag/Cu molar ratio determined the ratio of 0.5:1 achieved complete silver shell encapsulation, enhancing oxidation resistance and thermal stability compared to Cu NPs. Incorporating 20 wt% optimized Cu@Ag NPs into silver pastes, the nanoparticles were uniformly distributed on silver flakes, which helped to reduce the cross-sectional porosity to 19.69 % ± 1.12 % while maintaining 5B adhesion. Four probe tests demonstrated that Cu@Ag NPs reduced the resistivity by 33.33 % and 92.59 % compared to Cu NPs-added and pure Ag pastes, respectively, achieving a resistivity of 8.46 × 10⁻⁴ Ω·cm after 200 bending cycles. The low-temperature sintering characteristics of Cu@Ag NPs enable silver pastes to achieve optimal overall performance. These findings, supported by both theoretical simulations and experimental results, confirm the promising potential of Cu@Ag NPs for applications in the flexible electronics industry.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yu Fan,Bowen Lu,Ziqiang Han,Cong Luo,Liqi Zhang
CeO 2 support inhibits CaO sintering, and oxygen vacancy influences CO 2 hydrogenation performance, making CeO 2 widely applied in Integrated CO 2 capture and in-situ conversion technology for reverse water–gas shift (ICCC-RWGS). Oxygen vacancy concentration was dependent on the morphology of CeO 2 , which would affect metal dispersion and CO 2 hydrogenation conversion. However, Very little is known about the morphology effect of CeO 2 on the carbon capture and in-situ hydrogenation performance of DFMs. Here, Cu/CeO 2 with different CeO 2 morphologies was synthesized, and high Cu dispersion was achieved on Cu/CeO 2 -R, exhibiting the best CO 2 hydrogenation performance. Integrated Cu/CeO 2 with CaO by physical mixing method, CaO-Cu/CeO 2 was used to investigate the morphology effects of CeO 2 on the performance of CaO-Cu/CeO 2 for integrated CO 2 capture and conversion to CO. CaO-Cu/CeO 2 -R exhibited the best capture-hydrogenation performance (CO 2 conversion rate of 75 %, CO production rate of 9.72 mmol/g). The CeO 2 -R provided more surface oxygen vacancies, enhancing carbonate hydrogenation. The larger specific surface area and {1 1 0} crystal plane of CeO 2 -rod enhanced Cu dispersion, and the smaller particle size of CeO 2 -R enhanced its interaction with CaO, improving the cyclic stability of CaO-Cu/CeO 2 -R. The hydrogenation performance of CaO-Cu/CeO 2 was dependent on the morphology of CeO 2 , providing insights into the design of high-activity metal catalytic components in ICCC-RWGS.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xiuxian Zhao,Heng Zhao,Anna Mei,Lin Peng,Junhua Sun
Green and high-performance biomass-based adsorbents have a good application prospect for the removal of heavy metals. At present, the preparation of chitosan/lignin biomass adsorbents mainly adopts dissolution-drying method, and the obtained adsorbents show relatively poor adsorption performance for heavy metals. To overcome this problem, a novel chitosan/lignin hydrogel (CSL) is prepared by a simple one-pot method through the Mannich reaction. Research findings show that the hydrogels present higher adsorption selectivity for Pb(II) and Cu(II) than other common heavy metals. Among them, the optimal hydrogel CSL1 shows unexpectedly ultrafast adsorption rate for Pb(II) and Cu(II) with equilibrium time of only 1 min and 2 min. Meanwhile, the maximum adsorption capacities of CSL1 for Pb(II) and Cu(II) are 139.86 and 98.71 mg·g −1 , respectively. Compared with the reported adsorption materials related to chitosan or lignin, the CSL1 has the advantages of simple preparation process, considerable adsorption capacity, and short adsorption equilibrium time. Moreover, the adsorption mechanism is investigated by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the results prove that the adsorption mechanism is chemical complexation. This work not only contributes to the advancement of hydrogel-based adsorbents, but also holds significant industrial potential for addressing water pollution issues and promoting sustainable development.
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PubMed
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Chen Wang,Congbi Li,Xiaohui Wu,Xiangling Zhang,Mingjie Huang,Tao Zhou
Efficient and sustainable generation of high-valent metal-oxo species (HVMs) is critical for selective decontamination via Fenton-like catalysis, however, maintaining electron density balance at the active sites remains challenging. In this study, a zeolite-supported CuO catalyst was found to induce complete and selective Cu(III) oxidation of organics through persulfate (PDS) activation. PDS activation and pollutant oxidation occurred simultaneously at the electron-rich ≡Cu sites and electron-deficient ≡Al centers, respectively. Notably, zeolite could successfully serve as an electron buffer by creating dual active centers with distinct electron densities, stabilizing the generation and retention of ≡Cu(III) for exceptional anti-interference capacity. Strong metal-support interactions tuned the ≡Cu d-band center closer to the Fermi level, efficiently promoting electron transfer to ≡Cu sites through the Al/Si-O-Cu bond for the formation of ≡Cu(III). This study unveils a zeolite-based electron buffering strategy and presents an advanced approach for developing highly efficient catalysts in PDS activation and HVMs-mediated water purification.
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Applied Materials Today
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2024
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IF 7.2
Yuan Gao,Lian-Peng Li,Si-Yan Gong,Jia-Hui Huang,Shuo Xiang,Gan He,Qiong-Yu Wang,Mian Hu,Junliang Wang,Zhiyan Pan,Zhong-Ting Hu
Neonicotinoids as one of the newest major class of insecticides is a kind of persistent pollutants. Herein, copper-substituted zinc ferrites (Cu 0.75 Zn 0.25 Fe 2 O 4 ) prepared in subcritical aqueous solution has a nanosize of ∼2 nm with high crystallinity and strong magnetic property. At low catalyst dosage of 0.05 g L −1 , peroxymonosulfate (PMS) can be effectively converted into sulfate radicals in Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system. Thiamethoxam (THIA) degradation rate is in the order of Cu 0.75 Zn 0.25 Fe 2 O 4 > CuFe 2 O 4 > ZnFe 2 O 4 (124, 84, 21 × 10 −3 min −1 , respectively). At pH ∼7.0, THIA degradation efficiency can be over 99 % in 40 min. The radical species ( e.g. , HO • , SO 4 •− and 1 O 2 ) were demonstrated by EPR spectra using probe molecules. The majority effects in Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system with kinetics modelling were comprehensively investigated as well. This work provides that multi-metal coupling, i.e. , Cu(Ⅰ)/Cu(Ⅱ) & Fe(Ⅱ)/Fe(Ⅲ), in spinel structure by polyhedral design is an effective strategy for enhancing the catalytic activity. The Cu 0.75 Zn 0.25 Fe 2 O 4 /PMS system has promising for water treatment of neonicotinoid insecticide with ease of recycling catalysts by magnetic separation.
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Molecular Catalysis
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2025
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IF 4.9
Kaixuan Yan,Xin Song,Chunliang Zhou,Junnan Liu,Rongji Cui,Panting Gao,Zhicheng Tang
The presence of sulfur-containing impurities in natural gas not only diminishes its utilization value, but also results in the emission of sulfur-containing pollutants. In this study, a Cu-Ce bimetallic-loaded MCM-41 catalyst was prepared by ammonia evaporation method for the catalytic hydrolysis of carbonyl sulfide (COS). The desulfurization efficiency of Cu 25 Ce 5 /MCM-41 can reach a 100 % COS removal rate and maintain for 3.5 h. CuO furnishes the predominant weakly acidic and weakly basic sites for the desulfurization process, which are conducive to the adsorption of COS. Meanwhile, CeOx provides a greater abundance of moderately basic sites for the desulfurization process, which help to improve the removal efficiency of COS. The incorporation of Ce into the catalyst enhances the resistance to sulfur poisoning of Cu and prolongs the lifespan of the catalyst. The incorporation of Ce is capable of transforming the strongly basic sites on the surface of Cu 25 /MCM-41 into moderately basic sites, avoiding excessive oxidation of H 2 S. Additionally, the introduction of Ce offers a degree of protection for CuO, which improves the ability of the catalyst to resist sulfur poisoning. The combined effect of Cu and Ce was found to be instrumental in enhancing the adsorption of COS and in slowing down the oxidation of H 2 S. The reduction of Cu 2+ and Ce 3+ indicated their direct participation in the oxidation of H 2 S. Firstly, COS adsorbed on the catalyst surface is converted into H 2 S and CO 2 through a catalytic hydrolysis reaction. Subsequently, H 2 S adsorbed on the catalyst surface undergoes partial oxidation to sulfide, and partial further oxidation by oxygen-containing functional groups on the surface to S, SO 3 2- , and SO 4 2- , which results in the toxic deactivation of the catalyst.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Tingxiang Chen,Liugen Zhang,Jiang Li,Changyan Guo,Shanshan Qiao,Yansong Zhao,Jide Wang
This paper introduces a facile method to develop core-shell nanocomposite Cu/(Cu 2 O/CuO) through gradually oxidation on Cu nanocomposite precursors. As-prepared catalyst exhibited excellent catalytic activity in the reaction of water oxidation reaction (WOR). Comparing with the reported catalyst, Cu/(Cu 2 O/CuO) posed one of the highest O 2 evolution around 7700 μmol g -1 ·h -1 . By analyzing the composition of catalysts in each reaction stages, the evolution pathway of Cu towards Cu 2 O/CuO and the different roles of each component in catalytic water oxidation reactions were deeply studied. In presence of high conductive Cu element and excellent light absorption Cu 2 O, the photo generated electron and holes can be effectively separated and greatly improve the efficiency of the catalyst. The evolution process and synergistic effects of the three components play a crucial role in improving photocatalytic efficiency, which promoting the nanocomposite to be a highly efficient core-shell catalyst for WOR.
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RENEWABLE ENERGY
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2025
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IF 9.1
Liqiang Zhang,Ningmin Zhu,Yuxiang Liu,Honglei Shi,Yiya Wang,Ruiqi Liu,Riyi Lin
A two-stage co-pyrolysis approach was developed for the efficient utilization of marine waste plastics and biomass, with a focus on the influence of biomass components. HZSM-5 was modified with Cu via wet impregnation and applied in the catalytic co-pyrolysis of Enteromorpha and polypropylene under varying catalyst-to-feedstock ratios. The Cu/HZSM-5 catalyst was characterized using X-ray diffraction (XRD), N 2 adsorption, and scanning electron microscopy (SEM). The results showed that Cu modification preserved the HZSM-5 framework while increasing pore size, enhancing catalytic cracking efficiency. Thermogravimetric and kinetic analyses revealed that Cu/HZSM-5 lowered the pyrolysis temperature, reduced residues, improved synergy, and decreased activation energy without altering the reaction mechanism. The catalyst significantly reduced oxygenated compounds and enhanced the formation of aromatic hydrocarbons in the oil products, reaching a maximum aromatic content of 90.20 % at a 6:5 catalyst-to-feedstock ratio in the second stage. Under the same conditions, hydrogen production in the gas phase also peaked at 47.91 %. Increased catalyst dosage decreased carbon and hydrogen content in the char while raising oxygen and nitrogen levels, with a higher H/C ratio mitigating char aromatization and densification. A reaction mechanism for Enteromorpha and polypropylene over Cu/HZSM-5 was proposed. This study provides insights into the catalytic co-pyrolysis of marine waste plastics and biomass with complex compositions.
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Materials Horizons
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2025
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IF 10.7
Chen Peng,Jiaxin Li,Nan Wang,Xinyue Zhang,Wen Zhang,Zhirui Li,Keyi Zhang,Yangchaowei Ji,Wei He,Yan Li
We develop pyruvate with good biocompatibility and mitochondria-targeting ability as a copper ionophore (pyruvate-Cu). To further overcome its drawbacks, traceable nanoparticles are constructed to deliver pyruvate-Cu for triple negative breast cancer (TNBC) treatment. In vitro and in vivo results demonstrate that this work provides an efficient platform for enhanced TNBC therapy.
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PubMed
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危险品化学品经营许可证（带存储）