MICROCHIMICA ACTA
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2025
·Vol. 192
·期 9
·1-12
·
IF 5.3
Chen Rui,Pang Chaohai,Ma Xionghui,Wu Xuejin,Liu Chunhua,Yin Guihao,Zhang Zhenshan,Li Shuhuai
An ECL signal amplification strategy is introduced leveraging a multimetallic catalytic amplification effect. Nickel–iron bimetallic oxide compounds were synthesised and loaded with Cu SAs catalysts on their surface to create nickel–iron layered double hydroxides/copper single atoms (NiFe-LDHs/Cu-SAs) with robust catalytic properties. These NiFe-LDHs/Cu-SAs were employed as signal amplification elements to modify gold electrodes. C-dots labelled with thiacloprid DNA aptamers were used as the signal and molecular recognition elements to construct an electrochemiluminescence (ECL) immunosensor. The NiFe-LDHs/Cu-SAs significantly amplified the ECL signal of the C-dots, enhancing the sensitivity of the sensor. Upon capturing thiamethoxam via the aptamer, the ECL signal was effectively quenched, demonstrating the potential of this approach as a highly sensitive method for thiamethoxam detection. The excellent catalytic performance of NiFe-LDHs/Cu-SAs amplified the detection signal over 20-fold, while the aptamer improved the specificity of the sensor for thiamethoxam recognition. The method demonstrates a linear range of 2–6000 × 10 −12 mol/L and a detection limit of 6.52 × 10 −13 mol/L, with recoveries of 90%–110% for real sample analysis. This study demonstrates a highly sensitive and specific method for thiamethoxam detection, with real-world applicability, while highlighting an innovative multimetallic catalytic strategy that can facilitate advancements in sensor design across various fields. Graphical
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ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Liangyuan Chen,Jiangfeng Liu,Jitao Shang,Jin-Xiu Liu,Zhaofu Zhang,Xiaolin Liu,Du Wang,Yan Zhao
The instability of Zn anodes arising from uncontrolled deposition remains a critical bottleneck for zinc-metal batteries. Here, a sustainable Zn/Cu co-deposition strategy is reported via a cost-effective ethanol-based hybrid electrolyte (EtZCL-Cu) containing ZnCl 2 and insoluble Cu(OH) 2 additives. The high Cl − concentration enables continuous Cu 2+ release via complexation-driven Cu(OH) 2 dissolution, facilitating spontaneous Zn/Cu displacement-alloying reactions during cycling. This dynamic reconstruction mechanism ensures long-term exposure of zincophilic Cu sites on the electrodeposited Zn surface, thereby effectively preventing the defunctionalization of zincophilic alloy interfaces. The reconfigurable alloy interface maintains zero nucleation overpotential and enables dendrite-inhibited Zn electrodeposition, achieving exceptional cycling stability (>6000 h) in Zn symmetric cells. The ethanol solvent and Cl − complexed Cu + /Cu 2+ redox couple cooperatively increase the capacity of the activated carbon cathode full cells, delivering >90 mAh g −1 over 10,000 cycles at 0.5 A g −1 , with 95.9% capacity retention. This work establishes a sustainable interfacial engineering paradigm through electrolyte-mediated in situ alloying, effectively addressing the critical challenge of zincophilic interface defunctionalization in Zn-metal battery systems.
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Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Jianhui Gao,Deliang Liu,Zhiqiang Lin,ZhouYang,Zhuojun He,Xiafei Dai,Pengfei Zhao,Hongzhou Lu,Mingbin Zheng
Respiratory pathogens transmitted via clinical textiles represent a major source of hospital-acquired infections, yet current antibacterial fabric strategies are limited by poor durability and weak bacterial inhibition. Here, we reported a molecular-level strategy for the fabrication of copper-doped antibacterial cotton textiles (Cu@textile) via a simple immersion of common cotton in a Cu(II)- saturated NaOH solution. This process enabled stable coordination between the copper ions and cellulose hydroxyl groups, forming stable Cu-O bonds throughout the fiber matrix. Structural and spectroscopic analyses confirmed uniform copper integration and chemical bonding. The resulting Cu@textile exhibited potent, broad-spectrum antibacterial activity against key respiratory pathogens, including Pseudomonas aeruginosa, Acinetobacter baumannii, and Mycobacterium tuberculosis, with > 99% sterilization efficiency. Mechanistic studies revealed this efficacy as copper-induced reactive oxygen species (ROS) production and bacterial membrane disruption. This accessible and scalable antimicrobial textile eliminates the need for specialized equipment or nanoparticle synthesis, and may represent a strategic intervention to reduce bacteria propagation and contact infection risks in healthcare settings.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yuanzheng Zhang,Chao Liang,Kaihang Zhang,Yuxin Zeng,Yufei Zhou,Xiaoxia Zhang,Lifeng Yin,John Crittenden,Junfeng Niu
The persistent challenge of nitrate (NO 3 – ) pollution in water systems, profoundly impacting ecosystems and human health, demands effective remediation strategies. Here, we present an innovative S-scheme Cu@CN/TiO x heterojunction for high-efficiency photocatalytic denitrification (PCDN). Evaluation of its performance demonstrates exceptional NO 3 – removal efficiency (99.5%) and remarkable N 2 selectivity (95.5%), with 13.7 and 4.1 times higher rate constants of NO 3 – removal than the individual Cu@CN and TiO x components. Notably, this catalyst exhibits impressive stability across multiple cycles, maintaining consistent high conversion rates and selectivity. Mechanistic insights unveiled a tandem reaction pathway where Cu@CN selectively reduced NO 3 – to NO 2 – , followed by the TiO x -mediated CO 2 • – generation, enabling highly selective NO 2 – to N 2 conversion. This unique catalytic system, featuring spatially separated redox-active sites, presents a promising avenue for efficient, selective, and stable denitrification processes, offering significant potential in addressing water pollution challenges and advancing tandem catalytic systems.
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Science Bulletin
·
2025
·
IF 21.1
Wanguo Gao,Zhe Lu,Yecheng Leng,Chengyang Wu,Yingfang Yao,Xi Zhu,Junchuan Sun,Xiwen Yu,Cheng Wang,Congping Wu,Wenlei Wu,Bing Wang,Lu Wang,Zhigang Zou
Cu-based catalysts attract considerable attention because of their exceptional CO 2 photo-/electro-/thermo-reduction capacities, where Cu(I) is generally treated as the active species. However, a significant problem hindering the large-scale applications of Cu-based catalysts is the inactivation of Cu(I) via irreversible redox to Cu(II)/Cu(0). This study proposes a Cu(I) valence pinning method based on hydroxyapatite (HAP). Experimental and theoretical studies demonstrate that the phonon resonance among the Cu(I) ions, their adjacent heteroatoms, and the intermediates adsorbed at the Cu(I) sites yields Cu(I) valence electrons in their lowest energy states. Thus, Cu(I) is stabilized, stable, and efficient photothermal CO 2 hydrogenation is promoted. However, because of the change of Cu(I) coordination environment during the CO 2 hydrogenation reaction, Cu(I) ions migrate into the bulk phase, leading to activity attenuation. Nevertheless, Cu(I) ions can be pulled out to the surface of HAP under the oxidative humid air condition, and the catalytic activity can be easily recovered. Thus, we propose a simple cyclic reaction/regeneration process. This enables the Ca 5 (FeCuCe) 5 -HAP catalyst to achieve the CO yield of 402.8 mmol g −1 h −1 and a CO 2 conversion rate of 27.7%, which is close to the thermodynamic equilibrium. This catalyst also displays a selectivity of approximately 100% and cycle stability of 156 h at 500 °C under a pressure of 1 atmospheric. Our study provides a viable method for the scale applications of Cu(I) based catalysts in the “negative carbon” industries.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jiaqi Wang,Shuangjun Li,Jingjing Zhao,Kaihong Liu,Bo Jiang,Hexing Li
Photothermal catalysis of CO 2 hydrogenation holds great potential in achieving carbon neutrality . However, the rational design of cost-effective photothermal catalysts with high performance for CO 2 hydrogenation is an ongoing challenge. Herein, we employed CuCo y BOₓ composite catalysts by incorporating both CuBOₓ and amorphous CoBOₓ to efficiently catalyze the CO 2 hydrogenation. Besides the high selectivity (98.0%), the optimized CuCo 5 BO x demonstrated a remarkable CO yield of 124.7 mmol g⁻¹ h⁻¹ under illumination at 300°C, which was 3 times higher than the traditional thermocatalysis. Experimental results and theoretical calculations demonstrated CuBOₓ acted as a photocatalyst , donating electrons to CoBOₓ active sites. Coupling boron-oxygen species with CuCo bimetallic-oxides synergically enhanced the CO 2 adsorption capacity and accelerated charge transfer, thereby enhancing the photothermal synergistic effect and consequently boosting the catalytic activity. This study establishes an approach for the rational design of non-precious metal-boride catalysts, enabling efficient photothermal conversion of CO 2 into CO under mild conditions.
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Advanced Science
·
2022
·Vol. 9
·期 9
·2104972
·
IF 17.521
Shenghua Wang,Kai Feng,Dake Zhang,Deren Yang,Mengqi Xiao,Chengcheng Zhang,Le He,Binhang Yan,Geoffrey A. Ozin,Wei Sun
Cu-based catalysts exhibit excellent performance in hydrogenation reactions. However, the poor stability of Cu catalysts under high temperatures has restricted their practical applications. The preparation of stable Cu catalysts supported by SiO 2 with strong metal–support interaction (SMSI) has thus aroused great interest due to the high abundance, low toxicity, feasible processability, and low cost of SiO 2 . The challenge in the construction of such SMSI remains to be the inertness of SiO 2 . Herein, a simple and scalable method is developed to prepare 2D silica (2DSiO 2 ) supported Cu catalysts with SMSI by carefully manipulating the topological exfoliation of CaSi 2 with CuCl 2 and thereafter calcination. The prepared Cu-2DSiO 2 catalysts with the unique encapsulated Cu nanoparticles exhibit excellent activity and long-term stability in high-temperature CO 2 hydrogenation reactions. This feasible and low-cost solution for stabilizing Cu catalysts might shed light on their realistic applications.
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Advanced Optical Materials
·
2024
·Vol. 12
·期 23
·2400762
·
IF 8
Wentao Niu,Xiulin Xie,Zhong Chen,Ruixin Sun,Yu Li,Shuaibing Wang,Yu Zhang,Chunhe Yang,Aiwei Tang
Recently, I-III-VI type quantum dots (QDs) have attracted considerable attention in display technology due to their large-scale tunable emission and environmentally friendly characteristics. However, within this family, narrow-bandwidth Cu-based QDs have rarely been reported. Herein, the synthesis of narrow-bandwidth blue-emitting Cu-Ga-S (CGS)-based QDs is reported by a hot-injection method for the first time, boasting a narrow full width at half-maximum (FWHM) of 29 nm, closely approaching that of traditional Cd-based QDs. Through precisely controlling the temperature of nucleation stage, CGS-based QDs showcase a representative blue emission at 475 nm, featuring the narrowest FWHM and a photoluminescence quantum yield (PLQY) of 32%. Besides, the femtosecond transient fluorescence (fs-TA) characterization indicates that the narrow-bandwidth luminescence is attributed to band-to-hole recombination rather than donor-acceptor pair (DAP) recombination. The work opens a new avenue for narrow-bandwidth I-III-VI QDs, offering increased potential for applications in blue-light-emitting devices.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Longfei Zhang,Ping Wang,Xiqing Wang,Qi Zhang,Yunpu Wang,Yuhuan Liu,Lantian Zhao,Roger Ruan,Xian Cui
Contamination of heavy metals has always been a pressing concern. The dry-wet alternately treated carboxymethylcellulose bentonite (DW-CB) was successfully prepared by intercalating bentonite (BT) with carboxymethyl cellulose (CMC) obtained by solvent processes using enzymatically digested wastepaper as cellulosic raw material, and the adsorption capacity of Cu 2+ on DW-CB in aqueous solution was investigated. A 98.18 ± 2.31 % removal efficiency was achieved by 4 g/L of DW-CB after 8 h in a solution containing 100 mg/L of Cu 2+ , which were 4.1 times and 1.5 times of that of BT and adsorbent prepared without alternating dry-wet process, respectively. The introduction of –COOH groups during the preparation of DW-CB enhanced the electrostatic interaction between DW-CB and Cu 2+ , which was the main driving force for Cu 2+ removal. The pseudo-first-order kinetic model and Langmuir model better described the adsorption process and adsorption capacity of Cu 2+ on DW-CB. DW-CB still showed high removal of Cu 2+ (19.61 ± 0.99 mg/g) in the presence of multiple metal ions , while exhibiting the potential for removal of Zn 2+ , Mg 2+ and K + , especially Mg 2+ (22.69 ± 1.48 mg/g). However, the interactions of organics with Cu 2+ severely affected the removal of Cu 2+ by DW-CB (removal efficiency: 17.90 ± 4.17 % - 95.33 ± 0.27 %). In this study, an adsorbent with high targeted adsorption of Cu 2+ was prepared by utilizing wastepaper and BT, which broadened the way of wastepaper resource utilization and had good economic and social benefits .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Long Liu,Zhi-Jun Zuo,Yue Du,Tingkai Wu,Jinting Wu,Jian Gao,Tiansheng Mu,Yong-Chao Zhang,Xiao-Dong Zhu
The electrochemical nitric oxide reduction reaction (NORR) is a promising green process for nitric oxide (NO) removal and ammonia (NH 3 ) synthesis. Among existing catalysts, copper (Cu) exhibits relatively high activity but is less stable and does not provide enough *H to further increase the NH 3 yield. In this study, a Cu/Fe 3 O 4 electrocatalyst with synergistic catalysis was synthesized. Cu contributes to NO activation and sequential hydrogenation, while Fe 3 O 4 promotes the decomposition of H 2 O to provide more *H and jointly promote NH 3 synthesis. The Cu/Fe 3 O 4 shows a high NH 3 yield of 347.5 ± 5.9 μmol h −1 cm −2 at −0.5 V vs. RHE and high Faraday efficiency (FE) of 95.8 ± 0.4 %, superior to most reported non-precious metal catalysts. Moreover, the catalyst activity was not attenuate after the 100 h stability test. The aqueous Zn-NO battery system demonstrates concurrent energy generation and ammonia synthesis capabilities, delivering a peak power output of 9.53 mW cm −2 alongside efficient NH 3 production with a yield of 595.7 ± 5.1 μg h −1 cm −2 .
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CARBON
·
2024
·
IF 10.5
Congli Zhou,Fangzhu Qing,Xiao Sun,Rongxuan Wu,Haodong Wang,Qiye Wen,Xuesong Li
Cu particles are limited in their applications due to their susceptibility to oxidation. Here we report a cost-effective method for producing Cu particles with oxidation resistance. By heating the mixture of basic cupric carbonate and glucose powders, Cu particles coated with amorphous carbon were achieved. The amorphous carbon was then converted into graphene through flash joule heating (FJH). The conductivity of the final product was 47.1 S/cm after FJH, which remained as 42.3 S/cm even after in hot air for 30 min, i.e., 89.8% conductivity retention. The product was demonstrated for the application of electromagnetic interference (EMI) shielding with an average EMI shielding effectiveness of 12.3 dB and 11.7 dB before and after oxidizing treatment, respectively.
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Materials Today Communications
·
2024
·
IF 3.7
Hanqing Zhao,Lingyu Meng,Feiyu Wang,Irfan,Ming Hu
Powder preparation is the key step in producing laser cladding coatings with desired properties. In this paper, quaternary TiO 2 -B 4 C-C-Cu composite powder with high sphericity and good densification has been successfully prepared by a powder fabrication process combining spray granulation with densification sintering. The effects of slurry characteristics, spray granulation process parameters, and densification sintering temperature on particle morphology and performance were studied. The formation mechanism of quaternary spherical TiO 2 -B 4 C-C-Cu composite powder was revealed by analyzing the process of heat transfer and water transfer in the droplets, and the optimization direction of the powder preparation was indicated. The optimized process parameters for the quaternary spherical TiO 2 -B 4 C-C-Cu composite powder are: slurry solid content of 52 wt%, dispersant content of 1.25 wt%, binder content of 2 wt%, inlet temperature of 180 °C, the airflow rate of 310 L/h, slurry feed rate of 4.5 ml/min, and the two-stage temperatures of densification sintering are 500 ℃ and 900 ℃ for 1 h, in turn. Under the optimized process, the fluidity of the powder reaches 112 s/50 g, the apparent density reaches 1.2 g/ml, and more than 70% of the particles are between 15–53 µm. The powder has been verified by laser cladding to prepare in-situ synthesized TiB 2 -TiC-Cu composite coatings , which could have a better prospect for potential application.
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