Catalysts
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2026
·Vol. 16
·期 3
·
IF 4.5
Songjie Li,Yuxin Li,Renzhe Jin,Jiajiao Wei,Peng Zhu,Jianmeng Wu,Xiaomei Yu,Jinyou Zheng
Efficient and low-cost electrocatalysts play a crucial role in hydrogen production through the electrolysis of water. Molybdenum (Mo) carbide with a similar electronic structure to Pt was selected, and both α-MoC1−xand α-MoC1−x/β-Mo2C electrocatalysts were successfully fabricated for electrochemical hydrogen evolution. A continuous optimization of the hydrothermal and carbonization conditions was carried out for the preparation of α-MoC1−x. The biphasic molybdenum carbide catalysts were further achieved via vanadium doping with a phase transition of molybdenum carbide from α to β, which increased the specific surface area of the electrocatalyst. It was found that the V-MoxC catalyst obtained at a Mo/V molar addition ratio of 100:5 exhibited the best hydrogen production performance, with a β to α phase ratio of 0.827. The overpotential of V-MoxC at η10decreased to 99 mV, and the Tafel slope reached 65.1 mV dec−1, indicating a significant improvement in performance compared to the undoped samples. Excellent stability was obtained for the as-prepared electrocatalyst for water splitting over 100 h at a current density of 10 mA cm−2.
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ENERGY & FUELS
·
2026
·
IF 6
Shaocong Pang,Jingyi Yu,Tianle Li,Liangliang Yan,Yuxiu An
Extreme high-temperature and high-salinity environments pose severe challenges for the field application of water-based drilling fluids. The thermal degradation of conventional polymer loss control agents is a key factor limiting their performance. The incorporation of nanomaterials offers a novel approach to enhance the high-temperature resistance of polymer loss control agents, making it a research hotspot in this field. In this study, a novel composite additive (DANT/HCM) was developed by physically blending β-cyclodextrin (β-CD) hydrothermal carbon microspheres (HCMs) with a comb-like polymer (DANT). Thermogravimetric analysis showed that DANT/HCM has excellent thermal stability. Structural characterization results reveal that oxygen-containing functional groups on the HCM surface form stable interfacial interactions with polymer segments via hydrogen bonding, conferring unique structural synergistic effects to the system. Scanning electron microscopy images showed that the HCM maintained an intact spherical structure after compositing. Performance tests showed that after aging at 240 °C, the filtration loss of the base mud with 1.5 wt % DANT/HCM was only 9.0 mL, significantly lower than the 20.8 mL of DANT alone. Additionally, this composite material exhibits excellent salt resistance, maintaining a filtration volume of 27 mL even in 30 wt % NaCl drilling fluid. Combined with the zeta potential, particle size distribution, and SEM analyses, the performance enhancement was mainly due to the enhanced thermal stability of the composite system, improved particle dispersion, and the formation of a dense, uniform filter cake structure. This study achieves highly efficient filtration loss reduction by introducing thermally stable, nanosized, water-based, thermally carbonized microspheres and combining them with long-chain comb polymers, thereby forming a unique synergistic loss reduction mechanism. It provides a theoretical basis and practical reference for the development of high-performance, high-temperature-resistant filtration loss reduction additives suitable for ultradeep wells and high-temperature environments and has a good prospect for engineering applications.
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ACS Applied Electronic Materials
·
2026
·
IF 4.7
Yinghui Wang,Weimin Xia,Biao Guan,Jing Li,Chengmin Hou,Xiaofang Zhang
Nonlinear dielectric polymers for high-power density capacitors generally possess a high dielectric constant (εr), a large breakdown electric field (Eb), but a large dielectric loss (tan δ) due to the relaxation of high polar dipoles. To address the inherent trade-off between dielectric response and loss, we propose a low polarity polystyrene-4-vinylpyridine (P(S-r-4VP)) multipolymer by incorporating a 4-vinylpyridine (4VP) into polystyrene (PS) using conventional emulsion polymerization. Interestingly, compared to pure PS, the π-electron density of P(S-r-4VP) is significantly improved for the addition of functional 4VP unit, thereby promoting the strong electronic polarization response under an electrical field. As such, εr and Eb of the P(S-r-4VP) films increase with molar content of 4VP, and reach to 3.7 at 100 Hz and ∼550 MV/m, respectively. Notably, the P(S-r-4VP) copolymer exhibits a considerable discharged energy density (Ue) of 3.43 J/cm3 under an electrical field of 500 MV/m. Thus, this work offers valuable insights for the application of polystyrene-based polymers in dielectric energy storage areas.
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ENERGY & FUELS
·
2026
·
IF 6
Junwei Liao,Jiayu Wu,Shuting Jiang,Mingsi Wang,Yinyan Kong,Guanhua Shen,Jin Tan,Lianfen Chen,Minglei Lu
The development of biomass-derived fuels presents a promising solution for mitigating the severe carbon emissions associated with fossil fuels. A key strategy involves the direct refining of aqueous-phase bioethanol into higher alcohols, which serves as key precursors for diesel blendstocks and biojet fuel. Herein, to enable the direct upgrading of aqueous ethanol, we developed carbon-encapsulated Ni nanocatalysts (Ni@C) with water resistance by pyrolyzing organic precursors under acid–base regulation. The catalytic coupling yields 46.5 C-mol % of higher alcohols, of which C4–C7 and C8–C16 alcohols constitutes 56.9% and 35.2% in product selectivity, respectively. Excellent miscibility with diesel is exhibited by C4–C7 alcohols across a wide range of blending ratios. Furthermore, hydrodeoxygenation of C8–C16 alcohols provides a direct route to biojet fuel. Results from experiment and characterization demonstrate that acid–base regulation effectively tunes the local electronic structure and carbon defects on the Ni@C nanocatalyst surface. The proposed approach allows for precise modulation of the dehydrogenation, aldol condensation, and hydrogenation steps in the Guerbet reaction pathway, which suppress carbon chain scission and enhance the yield of higher alcohols. Overall, this research offers a novel and feasible strategy to the sustainable synthesis of higher alcohols from bioethanol, producing products directly applicable as blending components and biojet fuel precursors.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Junde Ji,Luchan Lin,Yifan Hu,Weiqing Wu,Xinde Zuo,Zhuguo Li
Surface-enhanced Raman spectroscopy (SERS) is widely used in the ultrasensitive detection of chemicals in environmental and biological fields. In this work, anchored plasmonic nanoparticle (NP) structures on various substrates are fabricated by ultrafast laser-induced multiphoton reduction, and the bonding strength between the plasmonic NP and substrate is enhanced by plasmonic effect-enhanced interfacial energy deposition. Anchored Ag NPs with a diameter of 20.68 ± 8.68 nm and a gap of < 5 nm are achieved by precise energy modulation. The prepared substrates show ultralow detection limits (10–14 M for crystalline violet and 10–12 M for thiabendazole) with high stability, which can retain 78.1% and 65.9% of the initial Raman intensity even after 100-day ambient aging and 105 bending cycles. The uniformity of the Raman intensity and substrate reproducibility has relative standard deviations of 4.29% in the 100 × 100 μm2 range and 7.95% for 25 substrates. In addition, direct nanofabrication on fresh biological substrates (e.g., apples, plant leaves) with minimal thermal damage can also be allowed. The mechanical stability test shows that the Raman signal after water flow impinging for 120 min is still 56.9% of the initial state. This in situ ultrafast laser synthesis provides a substrate-independent approach to fabricate a robust SERS platform for environmental, biomedical, and food safety applications.
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JOURNAL OF CHEMICAL EDUCATION
·
2026
·
IF 3
Qitong Zhang,Yu Wang
Carbon quantum dots (CQDs) are a prominent research topic in the fields of chemistry and interdisciplinary sciences. This paper presents a simple synthesis method for CQDs, aimed at introducing students to the preparation and application of nanomaterials. Through the use of nitrogen-doped CQDs, the experiment enables a systematic understanding of their structure, fluorescence mechanism, and potential applications in interdisciplinary fields, based on a comprehensive literature review. The fluorescence quantum yield of the CQDs was accurately determined using the reference method and characterized in detail using UV–vis, TEM, and XPS techniques. The innovation of this experiment lies in the combination of synthesized CQDs with poly(lactic acid) (PLA) powder, which, after drying, yields a white powder with prominent fluorescence properties. This material was then successfully used in 3D printing to produce a model of the “Lilac I” small satellite, demonstrating the potential application of CQDs in the field of 3D printing. The study further explores the prospects of this material in biomedical applications, particularly in the 3D printing of fluorescent probes. By integrating cutting-edge nanotechnology with traditional experimental teaching, this experiment not only enhances students’ engagement but also fosters their innovative thinking and comprehensive experimental skills.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yuanxin Yan,Yiqi Xu,Chunfang Zi,Gaige Li,Fang Liu,Yonghao Chen,Chengwei Jiang,Yanqing Tian
Owing to advantages such as high conductivity and low processing temperature, electrically conductive adhesives (ECAs) are critical for low-temperature interconnections; however, the ECAs remain challenging due to the need for high silver content. Sn–In–Bi alloys have attracted considerable attention due to their low melting point characteristics and well-established industrial applicability. This study investigated the synthesis of Sn–In–Bi low-melting-point alloy (LMPA) particles using water as an environmentally friendly and safe solvent under various conditions, successfully producing LMPA particles with an average size of 307 nm. Further, antimony-doped tin oxide nanoparticles were incorporated into the ECAs with LMPA particles to construct a multifunctional composite system. This filler system can serve as a “bridge” to connect the silver flakes to significantly improve ECAs’ electrical and thermal conductivity by using low Ag content (50 wt %) and bring functional natures such as enhancing mechanical strength and infrared stealth performance in different polymer substrates (epoxy resin E44 and thermoplastic polyurethane (TPU)). Especially, the ECA with TPU matrix demonstrates excellent flexible tensile performance, maintaining tensile properties comparable to pure TPU even at filler contents up to 65 wt %, offering an effective solution for high-performance, multifunctional, low-temperature interconnect materials in complex environments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhuwei Li,Wenya Tang,Xiaoran Shi,Dongxuan Zhang,Meiwen Guo,Meiqi Zhu,Dingfeng Jin,Huitao Fan,Bo Li,Liya Wang,Jungang Hou
The establishment of artificial photosynthetic systems for hydrogen peroxide (H 2 O 2 ) synthesis signifies a sustainable and eco-friendly strategy that could replace the conventional anthraquinone oxidation pathway. However, the majority of works have predominantly focused on the modulation of individual catalytic site, while systems that enable mutual regulation between adjacent catalytic sites have received little attention. Herein, we designed two novel ether-linked covalent organic frameworks (TpO-COF and TpOO-COF). Compared with TpO-COF, the cooperative interaction between adjacent oxygen catalytic sites in TpOO-COF results in a synergistic enhancement, yielding superior catalytic efficiency beyond the sum of isolated effects. When using benzoic alcohol as the sacrificial agent, a remarkable H 2 O 2 generation rate of 3067 μmol g −1 h −1 , the TpOO-COF catalyst demonstrates a 7.6-fold increase in activity compared to TpO-COF. According to theoretical analyses, TpOO-COF possesses considerably lower Gibbs free energies for the oxygen intermediates than TpO-COF, confirming the presence of mutual electronic modulation among its oxygen catalytic sites. This work advances a distinctive strategy for modulating catalytic sites while providing valuable mechanistic insights into the structure–activity interplay underlying H 2 O 2 formation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jianguo Feng,Zhen Li,Zhiyang Chen,Tianzhen Jiang,Xiang Li,Ziyi Wu
Stimuli-responsive pesticide nanocarriers allow precise delivery of pesticides to target pests, enhancing insecticidal efficacy while improving safety for non-target organisms. Herein, mesoporous silica nanoparticles (MSNs) were synthesized via the sol–gel method, followed by encapsulation of indoxacarb (IN) within their pores. Disulfide bonds (SS) were grafted onto the MSN surface, and cyclodextrin (CD) was incorporated to obtain enzyme/redox dual-responsive nanoparticles (IN@MSNs@SS@CD). Physicochemical characterization revealed a well-defined spherical core–shell structure. The encapsulated IN content was approximately 22.27%. In the presence of α-amylase and glutathione, the highest cumulative release (72.9%) occurred at 7 days, demonstrating dual-responsive release behavior. The contact angle and resistance to rain erosion experiments show that the nanoparticles have good wettability and adhesion. Insecticidal activity tests showed that IN@MSNs@SS@CD caused higher mortality in Cnaphalocrocis medinalis than commercial IN@EC. Moreover, the nanoparticles exhibited enhanced biocompatibility toward earthworms, zebrafish, and human bronchial epithelial cells (BEAS-2B), supporting their environmentally benign potential. Herein, a dual-responsive nanoparticle that can be used for precise pest management to improve biosafety and wettability has been developed. It provides a transformative approach for precision agriculture.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Cheng Wang,Luyao Li,Weicun Chu,Zhongliang Dong,Yinlong Zhu,Xiaoming Zhao,Lixiong Yin,Riming Nie,Wanlin Guo
Enhancing perovskite solar cell (PSC) performance often requires light management, interface engineering, and crystallization control, but these approaches typically involve multiple functional additives or interfacial modifiers, increasing fabrication complexity. Here, we introduce a polymer-assisted interfacial engineering strategy using a carboxymethyl chitosan (CMC)-based polymer functionalized with Cs + (PCM-Cs + ) to modify mesoporous TiO 2 (mp-TiO 2 ). Upon heating, this polymer sequentially releases functional molecular species, inducing backbone rearrangement, deacetylation, and polysaccharide cleavage. The resulting fragments passivate defects, promote TiO 2 microstructural reconstruction, and enhance electronic coupling with the perovskite. These effects yield power conversion efficiencies of 25.5% and 26.04% with TiO 2 and SnO 2 electron transport layers, respectively. To the best of our knowledge, this represents a record efficiency for fully air-fabricated perovskite solar cells. The devices also demonstrate outstanding stability under various ISOS proto-cools, with unencapsulated mp-TiO 2 :PCM-Cs + cells retaining over 97% of their initial PCE after 2,750 h dark shelf storage, projecting an estimated T 80 of ∼20,000 h. This work provides a universal and scalable interfacial engineering strategy to simultaneously achieve high efficiency and long-term stability in air-processed perovskite solar cells with simplified fabrication.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·122093
·
IF 7.5
Qian Wu,Guo Feng,Feng Jiang,Xiaojun Zhang,Yanqiao Xu,Jianmin Liu,Jian Liang
Magnesium aluminate (MgAl 2 O 4 ) spinel with dominant (400) plane exposure was synthesized by tailoring the precursor structure using a nonhydrolytic sol-gel method (NHSG). The effects of magnesium source and aluminum source on the preferential growth and morphology of MgAl 2 O 4 were systematically investigated. Rietveld refinement was used to analyze the structural variations of the prepared MgAl 2 O 4 . Furthermore, Density Functional Theory (DFT) calculation was performed to determine the adsorption energies of Congo red on the (311) plane and (400) plane. Results demonstrate that uniform MgAl 2 O 4 petals with a length of 240–280 nm were prepared using Mg and Al respectively as magnesium source and aluminum source, exhibiting a significantly enhanced I 400 /I 311 ratio of 2.459. This higher I 400 /I 311 ratio indicates a greater proportion of well-defined petals and corresponds to enhanced adsorption capacity. The MgAl 2 O 4 precursor, synthesized through polycondensation of MgAl 2 (OC 2 H 5 ) 8 prepared from metallic Mg and Al, exhibits an atomic arrangement analogous to the (400) plane of MgAl 2 O 4 spinel, facilitating its crystallization into (400)-dominant MgAl 2 O 4 petals. DFT calculations further reveal that the (400) plane of MgAl 2 O 4 exhibits a stronger adsorption energy to Congo red (CR) (-3.86 eV) than the (311) plane (-0.88 eV), consistent with the experimental results. This work provides a novel method for special crystal plane exposure.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Shichang Zhang,Zheng Qin,Zihang Yi,Weiping Liu,Lifeng Chen,Mohammed F. Hamza,Yuezhou Wei,Jie Yu,Shunyan Ning
Effective elimination of uranium (VI) from wastewater is critical to environmental remediation. Herein, a novel polyphosphonic acid-based ion exchanger PDVA/SiO 2 with spatially symmetric structure was designed and fabricated, and its adsorption behavior towards uranium in pH 4 solution was investigated at both mg/L and μg/L concentration levels using batch and column experiments respectively. The adsorbent could rapidly recognize and complex with uranium and reach adsorption equilibrium within 5 min, with the adsorption efficiencies of uranium in pure water, tap water, lake water and seawater were about 99.9%, 98.7%, 96.5% and 71.5% respectively. Uranium could be consistently and efficiently removed using a column separation device, with the concentrations in the purified solution less than 30 μg/L. The adsorption mechanism was dominated by ion exchange between UO 2 2+ and H + (in P–OH). Density functional theory (DFT) calculations demonstrated that the complex formed by the phosphate group with bi-deprotonated binding to UO 2 2+ possessed higher stability, and the binding process was accompanied by charge transfer and energy reduction.
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