CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Haoran Song,Xudong Zhang,Mengting Guo,Pu Wang,Jie Li,Chen Li,Yan Cao,Linfeng Zhang,Qun Zhao,Xuewei Hu,Senlin Tian
The intricate relationship between catalyst size and reactivity has long been debated on the conflicting role of size effects in governing catalytic performance. A series of MXene-confined copper particle catalysts with various sizes ranging from 0.52 μm to 2.06 μm were synthesized via the confined growth strategy. Intriguingly, the pseudo-first removal rate of sulfamethoxazole exhibited a volcano-shaped relationship versus Cu particle size, and the optimal catalytic activity was achieved with the intermediate size of 1.18 μm (Cu@MXene-650 °C catalyst). The Cu particle size also influenced the generation of Cu(I), which was confirmed as the primary electron shuttle for PMS activation. Electrochemical impedance spectroscopy and cyclic voltammetry further revealed that the intermediate-sized Cu particle catalyst exhibited the lowest charge-transfer resistance and the highest electron-transfer efficiency. Hydroxyl radical (HO • ), sulfate radical (SO•- 4), singlet oxygen ( 1 O 2 ) and superoxide radical (O•- 2) were identified as the primary reactive species. Additionally, the micron-sized Cu@MXene catalyst demonstrated excellent performance over the pH range of 3.0 to 9.0, strong resistance towards common water matrix components and good stability in real river water. This work established a volcano-shaped relationship between Cu particle size and catalyst activity, thereby improving understanding of the role of metal particle size effects in advanced oxidation processes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Wengang An,Yuhua Niu,Xiangyu Yan,Chuchu Deng,Changhong Zheng,Benzheng Li,Xiaoxin Yang,Nan Li,Yuesuo Yang,Wei Fan
Nanoscale control of charge-flow pathways can enable multifunctional photocatalysis by decoupling fast reduction from selective oxidation. Here, we report an MXene-bridged urea-modified perylene diimide polymer (UPDI)/ZnIn 2 S 4 ternary photocatalyst, denoted as UPMZ-50 (UPDI/MXene/ZnIn 2 S 4 containing 50 wt% ZnIn 2 S 4 ) that realizes a bidirectional dual-Schottky charge-transfer topology. Structural and electronic characterizations reveal that metallic MXene forms back-to-back Schottky junctions with both UPDI and ZnIn 2 S 4 . This configuration generates two oppositely oriented interfacial electric fields at the semiconductor/MXene contacts, which direct photogenerated electrons from both semiconductors onto the MXene nanosheets. Consequently, this architecture separates electron-rich reduction domains on MXene from hole-rich oxidation regions on the semiconductors. This dual-Schottky architecture suppresses charge recombination and enables stable multifunctional photocatalysis. Under optimized conditions, UPMZ-50 delivers efficient H 2 O 2 production (987 μmol·g −1 ·h −1 , 76.3% selectivity) and 92.4% tetracycline (TC) removal, while also exhibiting an H 2 evolution rate of 10.0 mmol g −1 ·h −1 as a benchmark for reduction performance. Mechanistic investigations identify superoxide (·O 2 − ) as the dominant reactive oxygen species (ROS) and a key intermediate for H 2 O 2 synthesis. The in situ generated H 2 O 2 is subsequently activated to yield ·OH, and together, these ROS promote TC degradation. These findings highlight MXene-based dual-Schottky heterojunctions as a versatile strategy for tuning charge-flow regulation. This work offers a transferable blueprint for decoupling high-rate reduction from ROS-driven selective oxidation, thereby bridging the gap between efficient solar-fuel production and environmental decontamination.
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ACS Applied Materials & Interfaces
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2026
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IF 8.2
Ying Tang,Juan Jia,Hui Zeng,Zebao Rui
In N2 photoreduction, photogenerated holes and electrons are involved in H2O photolysis for proton supply and the weakening of the N≡N triple bond for N2 activation, respectively. Rationally regulating the structure–activity relationship of these catalytic sites for available generation of charge carriers is crucial for optimizing N2-to-NH3 conversion efficiency. Herein, a robust photothermal catalyst carboxyl-enriched supramolecular (perylene tetracarboxylic acid, PTA) functionalized MIL-125(Ti)/MXene having dynamic proton extraction sites is designed for efficient N2 photoreduction. Among these, MIL-125(Ti), PTA, and Ti3C2 MXene are, respectively, responsible for N2 activation, reliable proton supply through interconversion between Brønsted acid and its conjugated base, and a photothermal response for accelerated reaction kinetics. The synergistic collaboration of these functionally distinct modules enhances light harvesting and responsiveness for dynamic multielectron/proton extraction, thereby facilitating feasible photothermal catalytic ammonia production. Remarkably high solar-to-ammonia conversion rates of 314.5–654.7 μmol g–1 h–1 are achieved under 100–500 mW cm–2 illumination. This work provides insights into the rational design of an efficient solar ammonia synthesis system.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Xuefeng Sha,Xianyin Song,Qiwei Shangguan,Yawei Lv,Fan Zeng,Xingang Zhang,Xueli Wu,Minghao Yu,Changzhong Jiang
MXene has emerged as a promising alternative to carbon-based capacitor materials since its inception, however, the current practical implementation still faces dual challenges: environmentally hazardous, time-consuming synthesis procedures and intrinsically low-concentration pseudocapacitive active sites. Herein, a short-duration, eco-friendly and high-efficiency double fluoride salt hydrothermal strategy was proposed to fabricate Ti 3 C 2 MXene with unparalleled electrochemical properties. A comprehensive and good balance, including rapid MAX phase etching, just-right titanium terminal water oxidation, and ammonia reduction activation, is achieved via a one-step NH 4 HF 2 hydrothermal reaction at 160 °C for merely 1 h (TOR-MXene). It drastically outperforms conventional HF acid etching at 60 °C for 48 h (P-MXene). Systematic experimental characterizations (HRTEM, SAXS, XPS, EXAFS, EPR and in-situ XRD, in-situ Raman) and DFT calculations consistently reveal that instead of the generally believed pore expansion, the abundant highly-reduced titanium dioxide nanoclusters anchored on the surface of MXene exhibit substantial pseudocapacitive activation, accompanied by the threshold Bader charge of Ti atoms exceeding 10.5 |e|. Consequently, the prepared TOR-MXene delivers a remarkable specific capacitance of 446.1 F g −1 even at the ultrahigh current density of 30 A g −1 , a sixfold improvement over the P-MXene of 74.8 F g −1 . Moreover, the TOR-MXene electrode displays around 91.2% capacitance retention over 50,000 cycles, showing an extremely high cycling stability. This strategy establishes atomic-level design principles for MXene-based energy storage, advancing efficient synthesis and performance optimization.
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NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.6
Yuyi Xia,Zhongshu Duan,Xiangrong Zeng,Tao Chen,Zesen Huang,Xia Gong,Yangping Wen,Guixia Tan,Mingfang Li
Acetaminophen (APAP), a widely used analgesic and antipyretic, poses significant health risks upon prolonged or excessive exposure, necessitating sensitive and reliable detection methods. Herein, we fabricated an electrochemical sensing platform for APAP detection based on a novel rice husk biochar (RHB)/MXene–AuNPs composite. The composite synergistically integrates RHB's (derived from agricultural waste) sustainable porous architecture, MXene's excellent conductivity and AuNPs’ abundant catalytic sites, enabling efficient APAP oxidation. The sensing platform achieves a linear quantification range of 0.03–8.88 µM with an ultrasensitive detection limit of 21.4 nM (S/N = 3). It also exhibits robust stability (RSD < 1% after 110 cycles), high reproducibility (2.32% RSD across electrodes), and excellent selectivity against 50-fold excess interferents. Validation using commercial 999 Cold and Flu Granules yields recoveries of 96.2–101.7%, confirming its accuracy. This work pioneers a sustainable sensing strategy by transforming rice husk waste into a high-value electrode material, offering a robust, precise, and eco-friendly approach for APAP quantification in pharmaceutical and clinical applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yang Wang,Meili Ding,Jiani Chen,Jianfeng Yao
Biomimetic ZIF-L/MXene were prepared by a facile two-step synthetic route. • Microflower structure favors light harvesting and active site exposure. • MXene can expand the photoresponse into the near-infrared region. • ZIF-L/MX-0.8 achieves efficient photodriven CO2 fixation under ambient conditions. • The photothermal/photocatalytic synergistic mechanism was explored. Solar-driven carbon dioxide (CO 2 ) transformation into valuable carbon-based products is of high significance for simulating natural carbon cycling. However, the ongoing challenge lies in the design of photocatalysts for achieving efficient CO 2 conversion. In this study, inspired by natural wisdom, ZIF-dia/MXene microflowers are successfully constructed through [Zn(NH 3 ) 4 ] 2+ -induced self-assembly of Ti 3 C 2 T x MXene (T x = –F, –OH, =O) sheets followed by the in-situ growth of ZIF-DIA. Remarkably, the optimized ZIF-dia/MX-0.8 serving as a solar-triggered photothermal and photocatalytic bifunctional platform was found to catalyze the coupling of CO 2 and epichlorohydrin, with a cyclic carbonate yield of 98% under full spectrum illumination for 6 h, significantly surpassing the single components. Specifically, the hierarchical flower-like superstructure consisting of ZIF-dia and MXene sheets can favor light absorbance via multiple reflection and facilitate the exposure of active sites and mass transfer. In addition, this ZIF-dia/MXene composite can absorb the light covering the entire visible region owing to the presence of MXene, thereby enhancing the photothermal conversion. Furthermore, experimental results reveal that the CO 2 cycloaddition with epoxide over ZIF-dia/MX-0.8 is proved to be the synergy of photothermal catalysis and photocatalysis. This work enriches the design of MOF-containing photocatalysts, opening a unique and sustainable way to solve global environmental issues. Download: Download high-res image (165KB) Download: Download full-size image
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ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Xiaohui Yang,Yang Liu,Jiaojiao Qiao,Tingting Li,Lu Zhang,Ding Wei,Qingsong Li,Yi Wang,Ting Zhang
In order to overcome the poor mechanical properties and low permeation flux of MXene nanosheets, as well as the easy agglomeration and limited adsorption capacity of attapulgite (ATP), a composite membrane material (Fe-Co/MXene-ATP) was prepared by vacuum filtration method, of which ATP was inserted into the stacking layers of MXene and bimetallic oxides were loaded as active substances. Through a series of characterization and experiments, it was proved that MXene-ATP composite membrane was achieved, and Fe and Co oxides were successfully loaded on it. The membrane material was used to remove methylene blue (MB). Under the optimal experimental conditions, the removal ratio of MB can reach over 90%, the MB flux is 1.94 mL· cm −2 ·min −1 . The removal mechanisms of Fe-Co/MXene-ATP membrane materials for MB were clarified through comparative experiments and free radical capture, and their mechanisms mainly included MXene-ATP bifunctional substrate for synergistic bimetallic catalysis, the MXene confinement effect enhancing catalytic efficiency and stability, and the "adsorption-catalysis-filtration" trinity dynamic removal mechanism. LC-MS was employed to identify the intermediate products generated during MB degradation, and the potential degradation pathways were subsequently deduced.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Nan Pang,Xiao Cheng,Xiaoqing Yin,Yanyan Wang,Wang Liu,Meijie Yu,Chengguo Wang,Chuanjian Zhou
Sericin bridging builds H-bond networks, delivering 91 MPa strength and 14.3 MJ m −3 toughness. • Discontinuous SiO 2 enables MXene-dominated IR stealth with a 107.8 °C temperature drop. • 34.4 dB EMI shielding is achieved at a thickness of only 63 μm. • PVA/SS matrix and superhydrophobic layer (155.9°) ensure long-term stability. • Gradient architectures enable reliable piezoresistive response for motion sensing. Developing flexible materials with integrated infrared (IR) stealth, electromagnetic interference (EMI) shielding and long-term stability is essential for personal protection and smart wearables. Traditional MXene composites suffer from weak interfacial bonding, poor mechanical properties, easy oxidation, and the functional trade-off between hydrophobic protection and infrared stealth. Herein, a synergistic strategy of multi-level interfacial bridging and discontinuous superhydrophobic barrier was proposed to fabricate MXene/sericin (SS)/PVA flexible films with a micro-nano SiO 2 protective layer. Sericin acts as an interfacial bridge to construct dense and reversible hydrogen-bond networks, effectively improving mechanical performance. The optimized SMSP-35 film with 35 wt% MXene achieves a tensile strength of 91 MPa, a toughness of 14.3 MJ m −3 and 19.2% elongation at break. The discontinuous SiO 2 coating maintains the low-emissivity feature of MXene in the 8–14 μm band, reducing the radiation temperature of a 200 °C target by 107.8 °C. The film (63 μm) realizes an EMI shielding efficiency of 34.4 dB. Combined with the physical barrier of PVA, interfacial bridging effect of SS and superhydrophobic SiO 2 layer (155.9°), the film retains nearly original shielding performance after 5-month ambient exposure with outstanding oxidation resistance. It also exhibits reliable strain response for human motion monitoring. This work addresses the challenges associated with multifunctional incompatibility and limited stability, providing a viable design strategy for flexible multifunctional protective materials. Download: Download high-res image (416KB) Download: Download full-size image
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ACTA PHYSICO-CHIMICA SINICA
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2026
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IF 13.5
Zhiqing Jia,Xinju Gong,Di Lan,Huanhuan Sun,Yu Liu,Yuping Gao,Siyao Guo
Prussian blue analogues (PBAs) offer tunable coordination frameworks and intrinsic porosity, yet their limited structural robustness and attenuation capability restrict the performance of PBA-derived electromagnetic wave (EMW) absorbers. These drawbacks can be substantially mitigated in metal-carbon heterostructure systems, yet achieving well-defined multi-component heterogeneous interfaces and controllable magnetic-domain behavior remains challenging. Here, we propose an electrostatic-field self-assisted strategy to construct bimetallic PBA-derived multi-type carbon-encapsulated/MXene (NiCo@C@C/MXene) heterostructures with precisely engineered multi-component interfaces, which create a rich landscape of electrostatically induced dual-coupled interfaces acting as a core mechanism for enhancing dielectric loss. MXene nanosheets and PDA coating reinforce the PBA-derived carbon matrix and form multidimensional conductive pathways, while multi-type carbon matrix, defect porosity, and magnetic nanoparticles collectively enhance interfacial polarization and magnetic loss. The resulting synergy yields optimized impedance matching, strong attenuation, and broadband absorption, enabling the material to achieve a minimum reflection loss (RL) of −58.51 dB and an effective absorption bandwidth (EAB) of 5.44 GHz at an ultrathin thickness of only 1.57 mm. Radar cross-section simulations further reveal domain-coupling networks that intensify EMW dissipation. This work establishes a concise route to address intrinsic PBA limitations and interface-engineering challenges, enabling next-generation high-performance EMW attenuation materials. Using an electrostatic-field self-assisted strategy, bimetallic PBA-derived multi-type carbon-encapsulated/MXene heterostructures were successfully constructed. The electrostatically induced dual-coupled interfaces enabled precise microscopic regulation of interfacial polarization and magnetic domain behavior. At the nanoscale, the synergistic optimization of dielectric loss, magnetic loss, and impedance matching was achieved, offering a concise approach to overcoming the intrinsic limitations of PBAs and providing a theoretical basis for the rational design of next-generation high-performance electromagnetic wave attenuation materials. Download: Download high-res image (325KB) Download: Download full-size image
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ACTA PHYSICO-CHIMICA SINICA
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2026
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IF 13.5
Shuai Zhang,Haifeng Li,Shijie Zhang,Shun Wang,Suxuan Du,Zhiwei Zhao,Xiaomiao Zhao,Xiaowei Liang
The application of MXene in the electromagnetic wave absorption (EWA) field has been increasingly extensive. To explore the potential of more MXene types, this study has successfully synthesized Ta 2 CT x MXene via HF etching and subsequently prepared a series of Ta 2 CT x MXene/CuInS 2 composites using a microwave-assisted chemical synthesis system. The Ta 2 CT x sample has demonstrated an optimal minimum reflection loss (RL min ) of −27.61 dB with an effective absorption bandwidth (EAB) of 0.8 GHz at a thin thickness of 2.9 mm and a 50 wt% filler loading. In contrast, the Ta 2 CT x MXene/CuInS 2 -50 composite has exhibited a significantly superior EAB of 4.48 GHz at a thinner thickness of 1.5 mm under the same filler loading condition. This enhanced performance has been attributed to the improved impedance matching and increased dielectric loss contributed by the incorporation of CuInS 2 . Furthermore, the multilayered sheet-like structure formed by the two components has established a continuous conductive network, which has effectively dissipated electromagnetic energy through multiple reflections and conductive loss. Ultimately, this work has provided a viable strategy for developing high-efficiency absorbers based on Ta 2 CT x MXene materials.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
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IF 4.1
Gao Haonan,Wen Mingzhen,Li Jiali,Hou Shili,Li Lifen,Liu Guangyan
This work develops an in situ electrodeposition strategy to construct a honeycomb-like Ni/Co-MOF/MXene heterojunction directly on the glassy carbon electrode (GCE) surface at −1.3 V vs. Ag/AgCl, enabling ultrasensitive enzymatic electrochemical detection of trace urea. The high catalytic activity of Ni/Co-MOF and the superior conductivity of MXene were synergistically integrated in a 3D hierarchical heterostructure. Compared with traditional modification methods, this strategy significantly enhances the kinetics of electron transfer and the stability of urease immobilization. Characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), the heterojunction exhibits unique morphology and outstanding electroconductivity. Furthermore, the resulting Ni/Co-MOF/MXene/urease/GCE biosensor achieves a wide linear range of 1.0 × 10 –6 –1.0 × 10 –4 mol L −1 with a low detection limit of 4.9 × 10 –7 mol L −1 . The biosensor has been applied to the detection of practical samples, where the recoveries were 99.3–102.8% with a relative standard deviation (RSD) of 2.9–3.3%, which indicates that this biosensor has good practical applications and prospects for further development.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Guozheng Zhao,Jianfeng Jia
Organophosphorus pesticides (OPs) pose significant risks to food safety and environmental health, making the development of sensitive and reliable detection methods highly desirable. In this work, a highly sensitive electrochemical biosensor based on a MXene/gold nanoparticles (AuNPs)/acetylcholinesterase (AChE) composite was constructed for the detection of OPs. Owing to the large specific surface area and excellent conductivity of MXene, together with the stable immobilization of AChE via Au S bonds, the proposed biosensor exhibits enhanced electron transfer efficiency and enzymatic activity retention. Under optimized conditions, the biosensor shows a wide linear response toward OPs, with a low detection limit of 0.008 ng·mL −1 , calculated based on the 3 σ / k criterion. The sensor also demonstrates good selectivity against common interfering species, satisfactory reproducibility, and excellent batch-to-batch repeatability. Furthermore, the applicability of the biosensor was validated by the determination of OP residues in various real samples, including apples, and cabbages, with recoveries ranging from 96.36% to 103.31% and relative standard deviations below 3.0%. Owing to its simple fabrication procedure and compatibility with portable electrochemical devices, the proposed sensing platform shows great potential for on-site and rapid monitoring of OPs in food and agricultural products.
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