Small
·
2025
·
IF 12.1
Fukang Feng,Xiaoyu Zhang,Xinrui Han,Guangyu Wu,Weinan Xing
The efficiency of peroxymonosulfate (PMS) activation in photocatalytic processes critically depends on the regulation of electron transfer from generation to utilization. Herein, a holistic electron transfer pathway is constructed within a metal–organic frameworks (MOFs)-derived Cu-Cu x O/TiO 2 composite to achieve superior PMS activation. The incorporated Cu species serve as dynamic redox mediators, enabling an efficient non-photoinduced electron transfer pathway via Cu 0 &Cu n+ cycling. Simultaneously, the Cu-induced bandgap narrowing and abundant oxygen vacancies significantly enhance visible-light absorption and facilitate the rapid trapping of photogenerated electrons. This synergy establishes a continuous and highly efficient electron transfer from photoexcitation to catalytic reaction. The optimized catalyst Cu-Cu x O/TiO 2 -2 delivers an exceptional tetracycline hydrochloride (TC) degradation rate constant of 38.26 × 10 −3 min −1 , representing a 2.04-fold enhancement over pristine TiO 2 (18.74 × 10 −3 min −1 ). Mechanistic studies confirm that the radical ( • OH/ • SO 4 − ) and non-radical (h⁺) pathways function synergistically in the Cu-Cu x O/TiO 2 -2/PMS system, collectively enabling highly efficient TC degradation. Three plausible degradation routes are proposed based on intermediates identification and density functional theory (DFT) calculations. Furthermore, economic analysis is conducted to transition from mechanistic insight to practical value, assessing the commercial potential of the Cu-Cu x O/TiO 2 -2/PMS photodegradation system. This work provides valuable insights into the design of efficient composite catalysts through regulated electron transfer via dynamic redox cycling coupled with oxygen vacancy engineering.
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DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Chuanlong Men,Chenchen Wu,Lei Wang,Shengjie Gao,Yu Mao,Wei Liu,Changhong Liu,Lei Zheng
Postharvest preservation urgently demands innovative solutions bridging atomic precision with practical scalability. Here, a distinctive photocatalysis-driven self-assembly strategy is presented that fundamentally diverged from conventional high-temperature syntheses by enabling precise single-atom coordination under ambient conditions. This approach, utilizing α-lipoic acid (α-LA) as coordination ligand, achieved the mild assembly of S-coordinated Cu single-atom nanozymes (Cu/CNS) while significantly enhancing their enzymatic activity. The resulting material demonstrated unprecedented multi-enzyme mimetic activities (catalase-, oxidase-, and glutathione oxidase-like) with catalytic efficiency surpassing conventional nanozymes by orders of magnitude. The Cu/CNS exhibits near-perfect antimicrobial efficacy against Escherichia coli ( E. coli ), Staphylococcus aureus ( S. aureus ), and Botrytis cinerea ( B. cinerea ) through synergistic mechanisms. When integrated into chitosan-gelatin films (Cu/CNS@CS-Gel), it forms active packaging with pH-responsive behavior, exceptional barrier properties, and mechanical strength. Crucially, the synthesis is simple, scalable, and environmentally adaptable. Using strawberries and kiwifruits as representative examples, Cu/CNS@CS-Gel more than doubled the shelf life while efficiently maintaining nutritional quality. Beyond food packaging, this coordination chemistry platform is generalizable to other metal-ligand systems, offering a versatile toolbox for sustainable agriculture. By bridging atomic-level design with practical feasibility, the work advances sustainable nanozyme implementation in food systems.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xupeng Zhang,Zhiping Xu,Kaiqian Li,Xianghong Li,Shuduan Deng,Ying Liu,Gang Zhu
Wood-based substrates decorated with metal–organic frameworks (MOFs) postcarboxylation have garnered significant attention for CO2 capture. However, the practical applicability of composites synthesized via this method is constrained by modification difficulty, low binding strength, and environmentally unfriendly processes. In this work, we introduce an innovative approach that involves the oxidation of hydroxyl groups on wood cellulose C2 and C3 to aldehyde groups, producing a dialdehyde wood sponge (DWS). Subsequently, Cu-BTC MOFs (HKUST-1) were grown in situ in the 3D framework of the wood sponge through chelation. This strategy enhances the affinity between the MOFs and the wood-derived skeleton, significantly increasing the micropore surface area to 402 m2/g, with the micropores primarily concentrated at 0.71 nm. Benefiting from its high MOF load and abundant microporous structure, HKUST-1/DWS achieved a CO2 capture capacity of 2.34 mmol/g (273 K, 1 bar), remarkably surpassing that of HKUST-1/TWS (carboxylated wood sponge by 2,2,6,6-tetramethylpiperidinooxy), which exhibited a capacity of 1.59 mmol/g. Additionally, the synthesized solid adsorbent demonstrated high CO2/N2 adsorption selectivity (47.95), indicating the potential for efficient CO2 separation. This method of constructing MOF/wood-based CO2 sorbents enables chemical modification and facilitates efficient and sustainable carbon dioxide capture.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mengmeng Yan,Kang Xu,Yu-Xin Chang,Zhi-Yu Xie,Sailong Xu
Environmentally friendly P2-type layered iron manganese oxides appear to be one of the most potential cathode materials for sodium-ion batteries (SIBs). However, their practical application is hindered by the unfavorable phase transitions, dissolution of transition metals, and poor air stability. One effective strategy by either single-cation doping or high-cost Li involved co-doping is used to alleviate the problems. Here, low-cost Cu/Ti co-doping is introduced to boost P2-Na 0.7 Cu 0.2 Fe 0.2 Mn 0.5 Ti 0.1 O 2 as an air and electrochemical stable cathode material for SIBs. The resulting electrode delivers an initial capacity of 130 mAh g −1 at 0.1C within 2.0–4.2 V, a reversible discharge capacity of 61.0 mAh g −1 at a high rate of 5C and a capacity retention ratio exceeding 71.1% after 300 cycles. In particular, the co-doped crystal structure is well-maintained after 1 month of exposure to air, and even 3 days of soaking in water. Furthermore, the enhancement is elucidated by the effectively mitigated P2–Z and the completely suppressed P2–P′2 phase transitions, the decreased volume variation proved by in-situ X-ray diffraction (XRD), as well as the lowered transition-metal dissolution evidenced by inductively coupled plasma optical emission spectrometer (ICP-OES) and X-ray photoelectron spectroscopy (XPS). The low-lost Cu/Ti doping strategy could thus be effective for designing and preparing environmentally friendly and high-performance cathode materials for SIBs.
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高影响因子
Journal of Cleaner Production
·
2019
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IF 6.395
Yue Li,Huiqin Li,Shukun Le,Xue Bai,Xiaojing Wang
The conversion of the heavy concentration of nitroarenes into their corresponding non-toxic aminoarenes is very meaningful for both environment and industrial applications. In this study, a series of Cu 2 O/SrTiO 3 nanocomposites and further Cu 2 O/Cu/SrTiO 3 via Cu + reducing in situ during the reactive proceeding were fabricated and applied to reduce nitroarenes. The as-prepared composites present high reductive activity and reusable stability for 4-nitrophenol both under the continuous multi-batch ways and flow conditions. The test in an enlarged level revealed 4-nitrophenol (10 L, 0.01 mol L −1 ) could be quickly conversed to 4-aminophenol over the as prepared sample (300 mg) within 1 h under continuous flow conditions by a self-designed device. The mechanism investigation proposed that Cu 0 /Cu +1 pairs serve as a hydrogen and electron transferred shuttle to promote the reductive ability while SrTiO 3 as a protective agent packs up tetrakaidecahedron Cu 2 O to achieve a substantial increase in the stability of the catalyst. The existence of a Cu 2 O–Cu–SrTiO 3 three-phase interface in the hybrid is proved to play the key roles in the greatly enhanced electron transfer ability and the better catalytic activity. The present investigation indicates that the as-prepared samples may be effective and potential materials for the cleaner and sustained conversion of nitroarenes to aminoarenes on a lab level as well as a larger scale.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 10
·919
·
IF 4.5
Guanghua Chen,Ning Cao,Zhonghao Deng,Xiangqing Zhang,Xiao Wang,Chong Peng,Liling Fang,Xusheng Ao,Shaobin Tan,Weibin Qiu
Nitrate, as a core component of water pollution, poses a severe threat to the ecological environment and human health. Electrochemical ammonia synthesis via nitrate reduction (NO3RR) is a highly promising sustainable technology, yet the simultaneous achievement of high activity and high selectivity remains a critical challenge in this field. Conventional Cu-based catalysts suffer from insufficient intrinsic activity and sluggish reaction kinetics. Moreover, the Cuδ+active sites are prone to valence evolution and structural reconstruction during electrocatalysis, making it difficult to meet the demands of long-term industrial-scale operation. To break through the aforementioned bottlenecks, this study proposes a rare-earth-regulated electronic structure engineering strategy. By constructing a Cu 3d–O 2p–La 4f gradient orbital coupling system, the surface chemisorption behavior of transition metals is precisely optimized, and the electron transfer pathway is efficiently modulated. The introduction of La not only strengthens electron delocalization and transport through the gradient orbital channel to enhance the adsorption and activation capability of NO3−, but also stabilizes the Cuδ+active sites via its unique 4f electronic structure, optimizes the adsorption energy of key intermediates, and synergistically boosts the catalytic performance. Experimental results demonstrate that the optimized La0.02-CuOxelectrode exhibits no obvious performance degradation after continuous operation for 30 h at a large current density of 2.5 A cm−2, delivering an ammonia yield of 186.99 mg·h−1·cm−2and a Faradaic efficiency of 94.39%. This rare-earth orbital coupling strategy provides a new research insight for the rational design of highly stable Cu-based NO3RR catalysts.
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高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2026
·
IF 12.4
Sheng Zhao,Yongyi Qu,Wei Chen,Ruotong Li,Jing Zhu,Yunyun Wu,Lunli Xiang,Lin Li,Hongrui Zhu,Jixi Zhang
Nanocomposite hydrogel enables spatial redox compartmentalization. • Nanoparticle-released neocuproine hijacks endogenous Cu(I) pools. • Mitochondrial Cu(I) redistribution induces immunogenic cuproptosis. • Extracellular antioxidant components buffer ROS to preserve immunity. • Preoperative in situ vaccination elicits durable immune memory. Cuproptosis-based in situ tumor vaccination provides a unique opportunity to transform tumor destruction into systemic antitumor immunity. However, the oxidative stress required for efficient tumor killing simultaneously disrupts immune competence through copper toxicity and immunosuppressive remodeling. Herein, we develop a spatial redox compartmentalized nanocomposite hydrogel platform to resolve this paradox by selectively amplifying intracellular cuproptosis while preserving the extracellular immune niche. Following peritumoral co-injection of gallic acid-grafted chitosan (CS-GA), dopamine-grafted oxidized hyaluronic acid (OHA-DA), and neocuproine-caffeic acid (NCP-CA) nanoparticles, the hydrogel establishes distinct redox microdomains for tumor eradication and immune protection. Specifically, NCP selectively exploits endogenous exchangeable Cu(I) pools and redirects copper toward mitochondria, where copper valence transformation and ferredoxin 1-mediated activation induce dihydrolipoamide S -acetyltransferase oligomerization, mitochondrial proteotoxic stress, and cuproptotic immunogenic cell death. Meanwhile, CA treatment was associated with increased AMPK phosphorylation and a 63.5% reduction in PD-L1 expression. Simultaneously, catechol-mediated redox cycling by CS-GA&OHA-DA continuously scavenges extracellular reactive oxygen species, alleviating oxidative immunosuppression and restoring T-cell viability to 94.4%. After 14 days of treatment, a substantial tumor regression was observed with a tumor volume reduction exceeding 64.2%. In a contralateral tumor rechallenge model, enhanced infiltration of CD8 + T-cells (40.8%) and CD8 + T EM -cells (26.4%) contributed to 75.6% inhibition of tumor recurrence and 93.3% suppression of metastasis. By exploiting endogenous copper resources rather than exogenous copper supplementation and spatially decoupling tumoricidal oxidation from immune-protective antioxidation, this hydrogel platform establishes a new approach for cuproptosis-based in situ vaccination, inducing durable antitumor immune memory and effectively preventing postoperative tumor recurrence and metastasis. Download: Download high-res image (299KB) Download: Download full-size image
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Abdul Qadir,Adeel Ahmed,Pervaiz Ahmad,Aisha H. Albalawi,Zahrah Alqahtani,Haia H. Aldosari,Raza Ullah,A. Timoumi,Awais Khalid
Metal–organic frameworks (MOFs) have currently attracted interest as effective self-sacrificial templates for the fabrication of hierarchical porous metal–nanoparticle materials. This study involved the synthesis of Cu-based MOF-loaded polyacrylonitrile (MOF/PAN) fibers using electrospinning, subsequently subjected to calcination in a nitrogen environment to yield Cu nanoparticle-loaded carbon nanorods (Cu@CNRs) as heterogeneous catalysts. The catalytic performance of prepared Cu@CNRs was investigated via hydrogen peroxide (H 2 O 2 ), peroxydisulfate (S 2 O 8 2− ), and peroxymonosulfate (HSO 5 − ) activated degradation of sulfamethoxazole (SMX). The activation performance of Cu@CNRs followed the sequence: HSO 5 − > S 2 O 8 2− > H 2 O 2 , indicating that HSO 5 − was the most effective oxidant under identical conditions. The Cu@CNR-I/HSO 5 − system demonstrated exceptional efficacy, attaining 99.99 % SMX removal in 30 min and a significant rate constant of 0.2312 min −1 . The improved activity is due to the hierarchical porous structure, elevated surface area, plentiful active sites, and robust Cu-N-C/HSO 5 − synergy. The carbonization created a polarization disparity in Cu N coordination, thereby promoting PMS activation by Cu(I/II) species. Radical quenching and EPR tests revealed that SO₄ •- and OH • radicals predominated the degradation route. The primary operating factors, such as catalyst and oxidant dose, solution pH, SMX concentration, coexisting anions, and humic acid, were carefully examined. The catalyst Cu@CNR-I exhibited remarkable catalytic stability and reusability over five cycles, indicating significant potential as a sustainable heterogeneous catalyst for wastewater treatment applications.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Qingchun Lan,Yu Wang,Jinpei Du,Shuqin Fang,Xiaoming Ma
In this study, we developed an ultrasensitive competitive label-free electrochemical immunoassay for the detection of aflatoxin B1 (AFB1) based on a Cu/Cu 2 O/C nanocomposite platform. The sensing matrix was fabricated by thermal decomposition of a two-dimensional copper-organic framework, inheriting the porous structure and large surface area characteristic of MOFs while exhibiting enhanced electrical conductivity. In this competitive detection scheme, free AFB1 molecules compete with electrode-bound AFB1-BSA conjugates for limited antibody binding sites. The resulting variation in electrochemical signals exhibits an inverse correlation with toxin concentration, facilitating ultra-trace detection with an impressive limit of detection of 1.83 pg/mL. The immunosensor features dual linear detection ranges of 10–100 pg/mL and 150–1000 pg/mL, with high specificity and reproducibility. It responds significantly to AFB1, showing minimal cross-reactivity with AFB2 and AFG1, and negligible responses to unrelated mycotoxins. Reproducibility testing yielded an RSD of less than 0.2 %. The sensor retains over 95 % of its initial response after seven days at 4 °C, indicating stability. Validation with spiked cornstarch samples showed recovery rates of 99.68 % to 104.38 % and an RSD of less than 4 %, confirming its effectiveness in real sample analysis. This study establishes a generalizable approach for constructing high-performance immunosensing platforms that are applicable to various mycotoxins and biological targets.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yaxin Ru,Yajie Chen,Xinyan Yu,Qiuyu Zhang,Yuejia Yin,Guohui Tian
Hollow heterostructured catalysts have been widely investigated and applied in photocatalytic organic reactions. However, achieving hybrid catalysts with optimized hollow structure and controllable components is still a challenge. Herein, Cu-BTC@CuS@CeO 2 ternary heterostructure hollow octahedrons were designed and prepared using a copper-based metal–organic framework (Cu-BTC) as both copper source and template. A thin CeO 2 nanolayer was first formed and covered on the prepared Cu-BTC octahedron surface through a hydrothermal process. In the meanwhile, the Cu-BTC octahedrons were controllably etched in this hydrothermal process, leading to the formation of Cu-BTC@CeO 2 hollow octahedron. The following sulfidation reaction produced Cu-BTC@CuS@CeO 2 double p-n heterojunction hollow octahedrons. Benefiting from the novel hollow octahedron double p-n heterojunctions, excellent visible-near infrared light absorption, and fast charge transfer and separation, the obtained Cu-BTC@CuS@CeO 2 hollow octahedron hybrid catalyst exhibited a significantly higher photocatalytic activity toward the oxidative coupling of amines to imines at room temperature under visible-near infrared light irradiation compared to the control single component catalysts (Cu-BTC, CeO 2 , and CuS) and binary hybrid catalysts (Cu-BTC@CeO 2 , Cu-BTC@CuS, and CuS@CeO 2 ). The enhanced charge transfer at the double p-n heterojunction was discussed. Meanwhile, the photocatalytic oxidation products and reaction mechanism were investigated by surface-enhanced Raman spectroscopy, gas chromatography-mass spectrometry, and pyridine adsorption FT-IR spectroscopy. This work presents a promising strategy for the design of multi-component hollow heterostructure catalysts.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Baobao Bai,Liangmu Pei,Ziqun Yang,Juan Lei,Caiyun Han,Shuang Wang,Jiancheng Wang
Precisely controlling active-site architecture is key for non-noble metal oxide catalysts in volatile organic compounds elimination. Herein, we demonstrate that lattice-doped Cu, rather than surface-loaded Cu, plays a decisive role in regulating the coordination environment and defect chemistry of MnO 2 , thereby fundamentally enhancing its toluene oxidation performance. Combined theoretical and experimental studies reveal that lattice-doped Cu creates a favorable coordination environment by significantly reducing oxygen vacancy formation energy and increasing electron density near the Fermi level. As a result, the Cu-Mn catalyst achieves 90 % toluene conversion at 218 °C, outperforming surface-loaded Cu/Mn (229 °C) and pristine MnO 2 (250 °C). The enhanced activity originates from the coupled increase of Mn 3 + species and oxygen vacancies, which synergistically improves reducibility and oxygen activation. In-situ DRIFTS further demonstrates that lattice-doped Cu facilitates aromatic ring opening and accelerates deep oxidation pathways. In addition, the Cu-Mn catalyst exhibits excellent hydrothermal stability under humid conditions, underscoring its practical potential. This work establishes a clear structure-activity-mechanism relationship and highlights lattice Cu doping as a general strategy for designing efficient non-noble metal oxide catalysts for VOC abatement.
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 14.9
Fei-Fei Lu,Ru-Yi Hou,Qi Ma,Jia-Hong Li,Chang-Jiu Li,Venkataraman Thangadurai,Cheng-Xin Li
Metal-supported solid oxide fuel cells (MS-SOFCs) offer superior mechanical strength and fast start-up, but the mismatch between metal and cathode (oxygen electrode) components poses challenges for developing compatible, high-activity cathodes at intermediate-to-low temperatures (IL-T). Recently, cobalt-free cathode materials have attracted significant attention, especially donor-doped SrFeO 3− δ . To further improve their redox performance at IL-T, density functional theory (DFT) calculations were employed in this study to design Cu-doped SrFe 0.9 Nb 0.1 O 3− δ cathodes, revealing the correlation between Cu-doping and lattice distortion. DFT results indicate that moderate Cu-doping at the B site promotes defect formation and effectively reduces the oxygen vacancy formation energy of the parent SrFe 0.9 Nb 0.1 O 3− δ , while excessive Cu-doping limits the oxygen vacancy formation. Guided by theoretical insights, SrFe 0.9− x Nb 0.1 Cu x O 3− δ (SFNC x , x = 0, 0.05, 0.10, 0.15, and 0.20) materials were synthesized, and experimental results further support the DFT conclusions. The optimized SFNC10 composition exhibited the highest oxygen vacancy concentration and achieved a polarization resistance of 0.15 Ω cm 2 at 650 °C. Moreover, this work provides the first demonstration of the SFNC10 cathode applied in an MS-SOFC, with the configuration of FeCr||NiO-GDC||CoGDC||SFNC10, operating stably at 200 mA cm −2 for over 60 h and delivering a peak power density of 728.9 mW cm −2 at 700 °C.
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高影响因子
危险品化学品经营许可证（带存储）