CHEMICAL ENGINEERING SCIENCE
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2026
·
IF 5.1
Lin Li,Kaiyun Yang,Zhan Ding,Chang Liu
Spodumene is often associated with quartz in ore deposits. Due to their similar physicochemical properties, achieving selective flotation separation using sodium oleate (NaOL) alone is challenging. This study proposes an innovative reagent scheme for selectively separating spodumene from quartz via flotation. The approach employs a Cu(II)/peroxymonosulfate (PMS) advanced oxidation process to activate the spodumene surface, which subsequently promotes the adsorption of NaOL as the collector. Single-mineral flotation tests demonstrated that under the conditions of pH 8, NaOL concentration of 8 × 10 −4 mol/L, Cu(II):PMS molar ratio of 3:1, and total Cu(II)/PMS concentration of 3 × 10 −4 mol/L, the recovery of spodumene reached 93.48%, while that of quartz was only 0.91%. Artificial mixed mineral flotation tests yielded a spodumene concentrate with a Li 2 O grade of 6.52% and a recovery of 83.46%. The activation mechanism was investigated using zeta potential, contact angle, Fourier transform infrared spectroscopy (FTIR), electron paramagnetic resonance (EPR), scanning electron microscopy with energy dispersive spectroscopy (SEM), and X-ray photoelectron spectroscopy (XPS) analyses. The results indicate that OH generated by the Cu(II)/PMS system is associated with cleaning of the spodumene surface and modification of its chemical environment, which in turn correlates with enhanced NaOL adsorption and increased surface hydrophobicity. These observations are consistent with the improved flotation separation of spodumene from quartz under the tested conditions. This study presents a promising activation strategy for the efficient flotation of spodumene.
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Inorganics
·
2026
·Vol. 14
·期 7
·183
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IF 3.4
Xianguang Bai,Huiping Wang,Zebao Lu,Bin Li
A novel carbohydrazide-based ligand (L) and its binuclear Cu(II) complex were successfully synthesized and characterized. Structural analysis confirmed that the Cu(II) complex adopted a monoclinic crystal system with a distorted coordination configuration, in which the multidentate Schiff base ligand chelated and bridged two Cu(II) centers. The in vitro anti-tumor results revealed that the Cu(II) complex exhibited prominent cytotoxicity against five human cancer cell lines with much lower IC50values than the free ligand, copper chloride and cisplatin. Mechanistic studies demonstrated that the Cu(II) complex significantly increased intracellular ROS and MDA levels, decreased the GSH/GSSG ratio, and reduced ATP content, thereby disrupting cellular redox balance and bioenergetic metabolism. In addition, flow cytometry analysis verified that the complex effectively triggered tumor cell apoptosis. In contrast, free CuCl2showed almost no anticancer activity, indicating that the synergistic effect between the Schiff base ligand and copper ions contributed to the excellent anti-tumor performance. This work suggests that the prepared binuclear Cu(II) complex can serve as a promising candidate for developing metal-based anticancer agents.
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POLYMER BULLETIN
·
2026
·Vol. 83
·期 11
·593
·
IF 4.2
Tang Zhong-Xiang,Wu Bin,Shi Ying-Jia,Jin Meng,Yu Tian,Ren Hui,Ma Ning,Zhan Xue-Qing,Tsai Fang-Chang
Efficient wound management remains a critical challenge in clinical medicine and public health. Hydrogel-based wound dressings have garnered significant attention due to exceptional moisture retention and inherent cooling analgesia effects. This study develops an electrically triggered PVA/Cu-BTC@Aloe composite hydrogel for advanced wound healing. By incorporating Cu-BTC@Aloe nanocomposites (synthesized via Aloe adsorption onto Cu-BTC followed by freeze-thaw crosslinking with polyvinyl alcohol), the material achieves enhanced mechanical properties (tensile strength: 438.9 ± 42.7 kPa, + 47% vs. pure PVA) and dual functional capabilities. Under 3 V electrical stimulation, the cumulative release of Aloe at 3 h increased from 47% to 62%. Meanwhile, the hydrogel achieved antibacterial efficiencies of 97.8 ± 2.2% against Staphylococcus aureus and 99.9 ± 0.1% against Escherichia coli, while maintaining favorable cytocompatibility and promoting directional cell migration toward the anode of fibroblasts. The integration of electroresponsive materials, natural bioactive constituents, and electrical stimulation provides a promising multifunctional platform for electrically assisted wound management.
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AICHE JOURNAL
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2026
·
IF 4.4
Yajie Yu,Haiyi Chen,Kaiji Xu,Jinxin He,Bin Chen,Kok Bing Tan,Dongren Cai,Guowu Zhan
Conventional supported Cu catalysts for the reverse water-gas shift (RWGS) reaction suffer from activity-selectivity trade-offs and stability issues. Herein, we report a carrier-free Cu catalyst (bio-Cu) synthesized via a pollen-templated strategy. The template creates a hierarchical porous framework and enables in situ carbon doping (~4 wt%), ensuring homogeneous Cu dispersion and inhibiting agglomeration. In the RWGS reaction, the bio-Cu catalyst exhibits outstanding performance, achieving >99.1% CO selectivity with 25.3% CO 2 conversion at 340°C and 3 MPa, approximately 3.2 times higher than a conventional Cu benchmark. Under ambient pressure at 450°C, it maintains 30.5% conversion with 99.99% CO selectivity and shows exceptional stability over 100 h. Mechanistic studies reveal that carbon doping generates electron-deficient Cu δ+ species and promotes a synergistic carbon cycle that operates alongside the conventional redox pathway, collectively enhancing the catalytic efficiency. This work provides new insights into the rational design of high-performance, carrier-free CO 2 hydrogenation catalysts.
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JOURNAL OF BIOMATERIALS APPLICATIONS
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2026
·
IF 2.4
Xuejiao Ma,Yunhan Huang,Xinyu Wang,Jingrui Chang,Xiangru Xu,Aolin Chen,Bo Lu
Precisely targeting the site of bacterial infection while reducing harm to healthy tissues has turned into the primary aim of bacterial infection treatment. Based on this background, an acidity-triggered aggregation nanomaterial Cu2+/ZIF-8@PDA-GCS (CZPG) based on bimetallic doped metal-organic frameworks was designed. The zinc-based metal-organic framework doped with Cu2+, namely Cu2+/ZIF-8 (CZ), was first synthesized, followed by modification with polydopamine (PDA) and glycol chitosan (GCS) to endow the CZ with photothermal properties and pH-sensitive charge characteristics, respectively. Under normal physiological conditions, the potential value of CZPG is approximately neutral, and it shows poor affinity to normal tissue cells, but the surface potential of CZPG flips to positive potential at the site of acidic bacterial infection. This allows CZPG to aggregate and adhere on the surface of negatively charged bacteria to ensure the spatial accuracy of CDT/PTT and thus enhance the antibacterial effect.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2026
·
IF 7.6
Jiahui Zhou,Ziyi Zhang,Chenghao Jin,ShanShan Tong,Yunteng Qu
Electrochemical CO2 reduction reaction (CO2RR) to diverse high-value chemicals represents a promising carbon mitigation strategy, yet precisely controlling product selectivity remains a considerable challenge. Herein, we report a size-dependent Cu/CN catalyst for modulating the selectivity of CO2RR. Specifically, small Cu NPs on CN (∼5 nm, S–Cu/CN) achieved a 76.2% C2+ product selectivity at 0.6 A cm–2, while the large one (∼50 nm, L-Cu/CN) reached a 67.5% CH4 selectivity at 0.6 A cm–2. Physical characterizations revealed that S–Cu/CN displays partial Cu+ sites, whereas L-Cu/CN higher Cu+ content. Mechanism analysis revealed a balanced Cu0/Cu+ ratio in S–Cu/CN promotes C–C coupling at Cu+ sites to form C2+ products. Conversely, higher Cu+ content in L-Cu/CN decreased the *CO coverage and improved H2O dissociation, steering continuous hydrogenation toward CH4 generation. This work offers a novel strategy to design high-efficiency CO2RR electrocatalysts toward desired products.
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SENSORS AND ACTUATORS A-PHYSICAL
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2026
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IF 5.1
Yufang Cui,Wanyin Ge,Maohao Yang,Xin Dong,Bochuan Zhang
Breakthrough: Ag/Cu bimetallic sensitization and UV activation enables efficient room-temp NO 2 detection. • High response (2180 to 200 ppm NO 2 ) with fast 7/10 s response/recovery at RT under UV. • High selectivity and moisture resistance, integrated into smart masks for breath-level detection. Metal oxide semiconductor (MOS) NO 2 gas sensors are hindered from achieving high-performance, low-power practical applications due to their slow response/recovery times and excessively high operating temperatures. To overcome these obstacles, we propose a synergistic strategy combining silver/copper (Ag/Cu) bimetallic nanoparticle surface modification with ultraviolet (UV) light activation. Using NH 2 -MIL-68 as a sacrificial template, In 2 O 3 rod-like materials were prepared via a hydrothermal method, and Ag/Cu bimetallic nanoparticles were further decorated on their surface to construct a high-performance NO 2 sensor (Ag/Cu-In 2 O 3 ) capable of operating at room temperature. Under UV light excitation, the Ag/Cu-In 2 O 3 -1 sensor exhibited a high response of 2180 toward 200 ppm NO 2 , with response and recovery times as short as 7 s and 10 s, respectively. Moreover, the sensor showed excellent selectivity for NO 2 against various interfering gases and good humidity tolerance. The enhanced performance is attributed to the synergistic sensitization of Ag/Cu bimetallic nanoparticles and the photogenerated holes induced by UV illumination during response and recovery. This study highlights the potential of Ag/Cu-In 2 O 3 for room-temperature NO 2 sensing and demonstrates the effectiveness of UV excitation in boosting MOS gas sensor performance. Download: Download high-res image (135KB) Download: Download full-size image
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JOURNAL OF CATALYSIS
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2026
·
IF 6
Yuting Luo,Qingyi Lv,Huai Liu,Rui Zhang,Wenlong Jia,Lincai Peng
The structural reconstruction of Cu-based catalysts during the hydrodeoxygenation (HDO) process typically leads to the loss of active Cu + species and catalyst sintering, resulting in catalyst deactivation. Herein, we found that Pr-doped CuO x catalyst undergoes in-situ reconstruction to generate stable Cu + species during the HDO of vanillin (VAN) to 2-methoxy-4-methylphenol (MMP). This affords a high MMP yield of 85.5% using methanol as both the solvent and hydrogen donor, which is significant higher than that of pristine CuO x and previously reported catalysts for the HDO of VAN in MeOH. Electronic interactions between Pr dopants and the CuO x matrix strengthen the Cu–O bonds and stabilize Cu + species, thereby increasing the density of acidic sites and oxygen vacancies in the catalyst. This not only promotes MeOH decomposition for H 2 generation, but also facilitates VAN adsorption and activation, thereby boosting HDO activity. This work offers new insights for the in-situ construction of highly active and durable Cu + sites in Cu-based catalysts.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
·
IF 4.6
Duoyuan Meng,Yong Wang,Wolong Li,Zhenran Liu,Lili Sun,Yongcun Li
Rechargeable aqueous zinc-air batteries (ZABs) are promising candidates for next-generation energy storage due to their high safety, substantial energy density, and low cost. However, their practical adoption is impeded by inherent issues of conventional zinc anodes, such as dendrite formation, volume expansion, and low zinc utilization during repeated electroplating and stripping. To address these challenges, this study fabricates stable Sn Cu current collectors as anode substrates from Sn-plated copper bases with varying architectures. Electrochemical characterization confirms that the Zn@Sn-Cu electrode inherits the high ionic conductivity of the copper substrate while effectively suppressing hydrogen evolution and reducing the local corrosion current density. Post-cycling scanning electron microscopy (SEM) further reveals that the introduced Sn layer mitigates zinc dendrite growth during deposition/stripping cycles, facilitating the formation of a highly dense and uniform zinc layer on the Sn Cu substrate. Consequently, ZABs assembled with Zn@Sn-2DCu and Zn@Sn-3DCu anodes deliver high specific energy densities of 783 and 800 mAh·g −1 , respectively. Notably, the Zn@Sn-3DCu battery achieves an extended cycle life of over 1800 cycles at a current density of 1 mA·cm −2 .
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Small
·
2026
·
IF 11.8
Siqi Liu,Bowen Zhong,Baolong Wang,Yinuo Li,Li Liu,Wei Zheng,Jun Li,Yudong Huang
Advancing photothermal materials requires synergy between light collection and efficient heat transport. However, nanoscale photothermal fillers, while strengthening absorption, are constrained by limited dispersibility and high interfacial resistance. By contrast, micrometer-scale metal fillers aid conduction yet lie outside the plasmonic regime, and their smooth surfaces promote specular reflection, which limits light capture. Consequently, leveraging their latent complementarity is crucial. Here, a multiscale structure and interface strategy is introduced, in which electrodeposition and alloying build a structured Cu–Zn interface with bead-chain-like nanostructures along the flake edges, thereby forming a metallic backbone that lowers interfacial thermal resistance and simultaneously promotes light capture and heat transfer. Specifically, at 8 vol% loading the composite attains through plane and in plane thermal conductivities of 1.06 and 2.73 W m −1 K −1 . Moreover, it shows broadband absorption (200–800 nm) and exhibits rapid heating and steady state output under both broadband solar and UV irradiation, under 365 nm illumination the film warms to 91.3°C within 30 s, indicating a favorable steady state photothermal heating efficiency under the defined conditions. This strategy offers a scalable route for interface engineering of microscale metal fillers and thus couples’ light absorption, heat transport, and energy use in solar-responsive and renewable energy conversion systems.
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高影响因子
RARE METALS
·
2026
·
IF 11
Fan Xue,Liang Chen,Xindong Zhu,Jianrong Zeng,He Zhu,Si Lan
en This link goes to a English section zh This link goes to a Chinese section Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic-scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd-Cu nanoalloys from chemically disordered to highly ordered states by composition control and targeted H 2 thermal treatment. Under near-industrial conditions, all catalysts reach full acetylene conversion between 100°C and 120°C, whereas the ethylene selectivity enhances with the chemical ordering increasing. By combining synchrotron X-ray absorption fine structure (XAFS) with X-ray total scattering and reverse Monte Carlo (RMC) simulation, three-dimensional atomic models are reconstructed to quantitatively map surface coordination. Compared with the chemically disordered Pd-Cu nanocatalyst, the highly ordered PdCu shows an increase in average surface Pd-Cu coordination and an expansion of mean surface Pd-Pd separations. These structural features weaken ethylene binding and suppress re-adsorption, rationalizing the enhanced selectivity. Our study provides direct atomic-scale evidence connecting chemical order to catalytic selectivity and opens the way for guiding the precise design of bimetal nanocatalysts. 摘要 en This link goes to a English section zh This link goes to a Chinese section 精准调控双金属纳米催化剂的化学有序,可为乙炔加氢反应中活性与选择性的解耦提供有效路径。然而将表面有序度与催化性能直接关联的原子尺度证据仍较为缺乏。本研究通过成分调控与氢气热处理,成功实现了Pd-Cu纳米合金从化学无序态到高度有序态的转变。在近工业条件下,所有催化剂均在100–120°C区间内实现乙炔完全转化,而乙烯选择性随化学有序度的提升显著增强。结合同步辐射X射线吸收精细结构谱、X射线全散射及反向蒙特卡洛(RMC)模拟,我们重构了纳米合金的三维原子结构模型,实现了表面配位环境的定量解析。与化学无序的Pd-Cu纳米催化剂相比,高度有序的PdCu合金表现出更高的表面Pd–Cu配位数和更长的平均Pd–Pd键距。这些结构特征有助于弱化乙烯吸附并提高其选择性。本研究为化学有序与乙烯选择性之间的关联提供了直接的原子尺度证据,为双金属纳米催化剂的精准设计开辟了新途径。
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Dongying Yan,Weifeng Fan,Chenxi Bai
Upgrading biomass-derived platform molecules into liquid fuels is vital for sustainable biorefineries. However, selectively hydrogenating sterically hindered carbonyls, such as 2-acetylfuran (2-AF), remains difficult. The main challenge lies in targeting the C═O bond while avoiding the side reactions associated with the highly reactive furan ring. To address this activity-selectivity trade-off, we developed a defect-carbon-mediated interfacial engineering strategy to construct robust Cu/La2O3/C catalysts via a green, glucose-assisted sol–gel route. Unlike conventional inert carbon supports, the in situ-generated defect-rich carbon plays a pivotal dual role: it not only physically confines Cu nanoparticles to prevent sintering but also chemically induces the restructuring of the La–O framework during reduction. Advanced in situ characterizations (Raman, DRIFTS) combined with DFT calculations suggest the possible formation of Cu+–Ov–La3+ interfacial structures. These motifs are proposed as plausible structural features that may correlate with hydrogen spillover and carbonyl activation. Consequently, the optimized Cu/La2O3/C-350R catalyst achieves nearly quantitative conversion (>98%) and exclusive selectivity (100%) for 1-(furan-2-yl)ethanol, outperforming carbon-free counterparts at 160 °C. This work establishes a scalable protocol for coupling vacancy chemistry with hydrogen transfer dynamics, offering new insights for designing robust non-noble metal catalysts in biomass valorization.
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