NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Lijun Xue,Jie Zhang,Chenhui Qiu,Hui Wan,Guofeng Guan
The incorporation of Cu-species, leveraging their variable valence states, represents a promising strategy for enhancing photocatalytic CO2 reduction. However, the underlying mechanism through which multivalent Cu-species facilitate this process remains inadequately elucidated, motivating further investigation. Herein, multivalent copper-modified SrTiO3 nanofibers (CuxO/STO-Y) were synthesized via an electrospinning method combined with a glucose-assisted hydrothermal process. The optimized CuxO/STO-2 nanofiber photocatalyst demonstrated a CO2 photoreduction rate to CH3OH of 7.26 μmol g−1 h−1. According to the characterization results, loading CuxO species onto the SrTiO3 nanofiber surface can broaden the light-responsive range, further improving the separation efficiency of electrons and holes. The density functional theory (DFT) calculations revealed that photogenerated electrons from SrTiO3 preferentially migrated and accumulated on CuxO sites, thereby prolonging charge carrier lifetimes and ultimately improving the CO2 photoreduction efficiency. This work highlights the crucial role of valent-engineered Cu-species in enhancing the performance of photocatalysts.
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Zhao Jinwen,Wang Le,Liu Xiaolan,Zhu Yanqin,Yin Qinhong
Nanozymes have been valuable tools in colorimetric analysis due to their ease of production, long-term stability, and adaptable enzymatic activity, enabling them to induce color changes in substrates. This study presents a straightforward enzyme-based colorimetric sensor for morphine ( MOR ) detection. The sensor utilized the laccase-like activity of a self-synthesized Cu, Bi-phosphotungstic acid ( Cu, Bi-PTs ) nanozyme, which was loaded with phosphotungstic acid, copper, and bismuth through a one-pot microwave method. This nanozyme was capable of catalyzing the coupling reaction of 2,4-dichlorophenol ( 2,4-DP ) and 4-aminoantipyrine ( 4-AP ), leading to the conversion of colorless phenolic compounds into red-colored products. The method demonstrated a detection limit of 1.88 μg/mL for MOR and a linear dynamic range from 3.333 to 400 μg/mL. The calibration curve, given by the equation y = 0.0015x + 0.4081, exhibited excellent linearity (R 2 = 0.9914), confirming the method's reliability for quantitative analysis. The developed colorimetric method was successfully applied to real samples, showing relative standard deviations (RSD) between 1.4 and 4.3% for MOR detection. These results demonstrated that the method was sensitive, cost-effective, and rapid, making it suitable for the efficient determination of MOR .
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yifan Liu,Yiyu Yang,Minjie Peng,Wen Zang,Chaozhen Wang,Yuenan Zhang,Changyong Gao,Aiguo Wu,Yujie Zhang
Heparin, as a glycosaminoglycan with multiple physiological functions, performs important roles in clinical practice. The core function of heparin is its anticoagulant effect, which is commonly used to prevent and treat thrombotic diseases. However, when the heparin content in human blood exceeds the standard, it can result in thrombocytopenia, thereby posing threat to human health. Therefore, rapid, sensitive and accurate detection of heparin is of great practical importance in assessing the anticoagulant effect, prevention of thrombophilia, guidance on personalized medication, and avoiding side effects caused by excessive use. A new colorimetric sensor for detecting the anticoagulant heparin is introduced in this work. The sensor is low cost, fast, and simple. In the absence of heparin, protamine protects copper‑gold nanoparticles from the etching of iodide ions through electrostatic interaction, and the solution's color and spectral properties remain essentially the same as those of pure copper‑gold nanoparticles. When heparin is present, due to the strong electrostatic adsorption between heparin and protamine, protamine preferentially binds heparin and forms a complex. Cu-Au NPs are not protected and are etched into spherical Au NPs by iodide ions. The solution's color shifted from dark gray and purple to pink, thus colorimetric detection of heparin is realized rapidly based on the etching mechanism. The detection time is 15 min, and the detection limit is as low as 1 ng/mL. Compared with HPLC detection method, the colorimetric detection of heparin in serum samples has the recovery rate of 98.8–108.8 %, which has good prospects for application.
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CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Jianming Wu,Xi Cheng,Yulin Li,Guisheng Yang
In this study, Fe 3 O 4 -nanoparticles-contained polyamide 6 (PA 6) microparticles (FP) were developed by a first dispersion of Fe 3 O 4 -nanoparticles in ε-caprolactam (CL) monomer in the presence of polystyrene (PS) and a subsequent in situ CL open polymerization into PA 6, followed by PS removal. The FP microparticles (as magnetic separation material) and nanochitin (n-CT, as an effective metal-cation natural adsorbent) were then in situ encapsulated into poly(vinyl alcohol)-enhanced chitosan hybrids (PVA/CTS) to form biodegradable nanocomposite hydrogels (FPCC) with magnetic separation ability. The FPCC hybridized hydrogels enabled about 1.7-fold Cu(II) adsorption capacity as compared to the pure PVA/CTS hydrogels with a Cu(II) adsorption value of 38.7 mg/g. More attractively, the adsorption equilibrium could be achieved within 10 min, which is quicker than many previous adsorbents. Furthermore, simulation results indicated that Cu(II) adsorption behaviors of the hybrid hydrogels conform to a pseudo-second-order kinetic model and a Langmuir isotherm model.
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Materials Today Bio
·
2024
·
IF 8.7
Hui Yang,Sirui Huang,Xinwei Zhu,Yasi Chen,Chunming Xu,Ruohan Li,Pan Bu,Yufan Jiang,Changwei Li,Jie Yang,Zhenyi Chen,Weijie Peng,Lin Liu
Critical-sized bone defects present a formidable challenge in tissue engineering, necessitating innovative approaches that integrate osteogenesis and angiogenesis for effective repair. Inspired by the hierarchical porous structure of natural bone, this study introduces a novel method for the scalable production of ultra-long, copper-doped hydroxyapatite (Cu-HAp) fibers, utilizing the rapid gelation properties of guar gum (GG) under controlled conditions. These fibers serve as foundational units to fabricate three-dimensional porous scaffolds with a biomimetic hierarchical architecture. The scaffolds exhibit a broad pore size distribution (1–500 μm) and abundant nanoporous features, mimicking the native bone extracellular matrix. Physicochemical characterization and in vitro assays demonstrated that the copper doping significantly enhanced osteogenic and angiogenic activities, with optimized concentrations (0.8 % and 1.2 % Cu) facilitating the upregulation of osteogenesis-related genes and proteins, as well as promoting endothelial cell proliferation. In vivo studies further confirmed the scaffolds' efficacy, with the 1.2Cu-HAp group showing a remarkable increase in bone regeneration (bone volume/total volume ratio: 35.7 ± 1.87 %) within the defect site. This research offers a promising strategy for the rapid fabrication of multifunctional scaffolds that not only support bone tissue repair but also actively accelerate the healing process through enhanced vascularization.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Lei Wu,Xiuyun Ma,Xiumei Liu,Hong Du,Feng Wang
Hydrogenation of xylose is an important industrial process for the production of xylitol, which is known as a healthy sweetener. In this work, bimetallic phyllosilicate-derived Cu–Ni alloy catalysts were constructed via an ammonia evaporation method followed by reduction under hydrogen and applied for the hydrogenation of a high-concentration xylose aqueous solution for the production of xylitol. The Cu–Ni alloy catalysts exhibited higher xylose conversion than the corresponding monometallic Cu and Ni catalyst. And the xylitol yield was increased with the increase of the ratio of nickel to copper for the bimetallic alloy catalyst. The higher xylose conversion was obtained at elevated reaction temperature and H2 pressure. In addition, reduction conditions, especially temperature, were found to significantly influence the catalytic activity of the phyllosilicate-derived Cu–Ni alloy sample. The 5Cu15Ni-EA catalyst activated at 700 °C exhibited excellent performance for xylose hydrogenation in terms of xylose conversion (>99%) and xylitol selectivity (>99%) under moderate conditions (100 °C and 4 MPa H2). The performance of the 5Cu15Ni-EA catalyst is also superior to the reported consequences of xylitol manufacture via hydrogenation over a Raney nickel catalyst and a co-impregnation-derived bimetallic catalyst. Furthermore, the xylitol yield did not change obviously for 5Cu15Ni-EA during the 200 h of continuous reaction in a fixed bed reactor. The XRD, XPS, HRTEM–EDS mapping, and line scan results of the fresh reduced 5Cu15Ni-EA sample verified the existence of a highly dispersed Cu–Ni alloy. The formation of these uniformly dispersed Cu–Ni alloy sites induced efficient performance for the hydrogenation of a high-concentration xylose aqueous solution.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Xiao Yang,Shuting Huang,Dongyun Chen,Shi-hong Dong,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
As a means of addressing the growing challenges of environmental pollution and energy scarcity, microbial fuel cells (MFCs) represent a sustainable approach for wastewater treatment and energy generation. In the present study, a catalyst synthesized by compositing Cu-based multilayer nanosheets with hollow fibrous LZU1 (CL/NC) exhibited remarkable adsorptive and catalytic properties. It achieved a power density of 57.29 ± 0.69 W m–3 and maintained 90.05% of its initial power density after the substantial operational duration of 43,200 min. Notably, CL/NC-700 demonstrated an exceptional ability to degrade Rhodamine B, highlighting its significant potential in environmental remediation efforts. Its enhanced catalytic activity can be ascribed to the synergistic impact of N-doping and the hollow-fiber morphology of LZU1, which collectively optimize mass transfer and enrich the catalyst with active sites for the oxygen reduction reaction. Comparatively, CL/NC-700 demonstrated superior stability and efficiency over commercial platinum-based catalyst, underscoring its viability as a scalable alternative for MFC applications and environmental remediation.
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Nanomaterials
·
2025
·Vol. 15
·期 11
·778
·
IF 4.3
Weimin Ning,Mingxuan Li,Lei Jiang,Mei Yang,Maoyan Liu,Yong Liu
Bacterial leaf blight (BLB) is a destructive disease caused byXanthomonas oryzae pv. oryzae(Xoo). It has been proven that BLB adversely influences the growth and production of rice, resulting in substantial losses in yield. Nanoparticle–antimicrobial compounds possess excellent physicochemical properties, which have generated groundbreaking applications in protecting rice against BLB attacks. However, there is less research focused on the interaction between nanoparticles and the microbiome of BLB rice leaves, particularly the structure and function of endophytic bacteria, which are essential to plant health and pathogenesis. Therefore, the study explored how Cu-Ag nanoparticles influenced the endophytic bacteria’s composition and functions in healthy and BLB rice leaves. The data demonstrated that the relative abundance of beneficial bacteria,Burkholderiales,Micrococcales, andRhizobiales, increased after the introduction of Cu-Ag nanoparticles on the leaves of BLB rice. The examination of PAL activity demonstrated that nanoparticles limited the spread ofXooin rice leaves. Furthermore, endophytic community functional prediction demonstrated that nanoparticles may regulate the physiological process associated with potential stress resistance and growth-promoting function in the endophytic communities. This investigation may enhance the understanding of interactions between nanoparticles and the composition of rice endophytic microbiome, which can contribute to the exploration and application of nanomaterials in crop pathogen management.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yingqi Wei,Hao Wang,Yaxi Zhu,Guancheng Zhan,Lihuan Zhang,Huichang Gao,Longyang Jin,Ruobing Feng
Peripheral nerve injury frequently occurs alongside vascular injury due to the incorporation of vascular tissue within the nerve bundle. During the repair process of peripheral nerve injuries, the concurrent regeneration of capillaries within the nerve bundles is crucial for facilitating nerve regeneration. However, current studies often overlook the regeneration of blood vessels in nerve bundles when designing nerve repair scaffolds, leading to suboptimal nerve regeneration outcomes. To address this limitation, amino-modified Cu-doped mesoporous bioactive glass (Cu-MBG) was developed as a nanodelivery carrier for miR-29a to construct miR-29a@Cu-MBG nanoparticles, which exhibit dual functionality in promoting nerve regeneration and inducing vascular regeneration. Subsequently, miR-29a@Cu-MBG was incorporated into a CS/GelMA hydrogel to create an engineered multifunctional nerve conduit through the ionic cross-linking of chitosan and the optical cross-linking of GelMA, which demonstrated excellent mechanical properties and biocompatibility. In vitro cell experiments indicated that the sustained release of miR-29a@Cu-MBG from the conduit effectively delivered miR-29a into PC12 cells, leading to the upregulation of nerve regeneration-associated genes (GAP-43 and NF-200) and the outgrowth of neurite. Additionally, Cu-MBG was found to enhance the migration of HUVECs and upregulate genes related to angiogenesis (HIF-α, ANG, eNOS, and KDR), promoting the tube formation of HUVECs. These findings offer a perspective for the design of nerve conduits capable of promoting both nerve and vascular regeneration.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xuesong Peng,Fan Meng,Jie Jiang,Yaqiang Li,Guangzhao Wang,Ruopeng Li,Jialuo Lin,Longhao Zhu,Linghui Meng,Zongtai Wang,Maozhong An
Ultra-thin copper foil is critical for high-density interconnects and flexible electronics, yet developing a reliable release layer remains challenging. Here, we report an amorphous Ni–W alloy release layer and systematically evaluate its performance through experimental characterization and theoretical analysis. The Ni–W alloy (59.9 % Ni, 40.1 % W) forms a smooth, defect-free surface with an average roughness of 0.9 μm. In 50-cycle peel tests, the average peel strength stabilizes at 0.038 N/mm with a standard deviation of only 0.003, demonstrating highly controllable and stable cyclic peel behavior. The release layer maintains thermal stability below 600 °C, and atomic diffusion of Ni and W at 200 °C over 50 h has negligible impact on the copper foil conductivity. Theoretical calculations indicate that the Cu/Ni–W interface exhibits lattice mismatch, leading to weak adhesion (W a d = 1.45 J/m 2 ); in contrast, a co-deposited Ni-enriched transition layer achieves coherent lattice matching, significantly enhancing Ni–W/Cu interfacial strength and enabling differential control of interface bonding. This study represents the first scalable electro-deposition of an amorphous alloy release layer, providing precise control over peel strength and robust industrial applicability for ultra-thin copper foil production.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zhenhui Huang,Xiangying Wang,Wei Na,Xinyu Ling,Xingpeng Sun,Runqin Chen,Wengui Gao,Hua Wang
The surface properties of catalysts play a crucial role in CO 2 hydrogenation. In this study, Cu-loaded Ce–Zr oxide (CCZ) catalysts with distinct activities were synthesized via four methods. Catalytic testing revealed that the CCZ-HM catalyst exhibited the highest performance, achieving the greatest methanol space–time yield (STY). Structural and surface analyses revealed that low-valence Cu specie, oxygen vacancies, strong metal–support interactions, and balanced acid–base properties contributed to enhanced catalytic performance of the CCZ catalysts. Mechanistic studies indicated that CCZ-CP and CCZ-HM catalysts exhibited higher oxygen vacancy concentrations and enhanced surface acidity-basicity, which promoted CO₂ adsorption and the formation of carbonate species. In a CO 2 + H 2 atmosphere, both catalysts mainly formed bidentate formate species, which served as key intermediates in methanol synthesis. However, the strong adsorption capacity and limited H 2 spillover of the CCZ-CP catalyst hindered further hydrogenation of these intermediates, thereby reducing methanol production. In contrast, the excellent acid–base synergy and efficient H₂ spillover of CCZ-HM promoted the hydrogenation of CO₂-derived intermediates to methanol, resulting in enhanced STY. These findings indicate that the rational control of catalyst surface acidity, oxygen vacancy concentration, and H 2 activation ability is crucial for improving overall catalyst performance.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Qiule Li,Xianpeng Liu,Yueying Zhang,Xinge Wang,Jing Wang,Bin Wang,Geyu Lu,Fangmeng Liu
Precise detection of hydrogen sulfide (H 2 S), a key spoilage marker in premium foods, is essential for maintaining both flavor and safety. However, conventional sensors often struggle to achieve high sensitivity, stability, and low power consumption simultaneously. Here, we report a mixed-potential type gas sensor based on Cu-MOF sensing electrode, K 2 Fe 4 O 7 solid electrolyte, and Au reference electrode for rapid and non-destructive food freshness evaluation. The sensor achieves an ultra-low detection limit (LOD) below 5 ppb at room temperature via a two-electrode response mechanism, addressing the stringent requirements of premium food quality control. To improve stability, an electrode passivation strategy was introduced to suppress the formation of inactive sulfate deposits, extending repeatability from 22 to 66 cycles (change rate within 10%). Replacing Cu-MOF with CuO, its stability significantly improved after passivation, confirming the strategy’s general applicability. We further developed a portable H 2 S monitoring system capable of real-time freshness tracking, showing a strong correlation with early spoilage. This work demonstrates a generalizable stabilization strategy for mixed-potential type H 2 S sensors and provides a practical, non-destructive platform for freshness grading in premium food supply chains.
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