ChemElectroChem
·
2026
·Vol. 13
·期 2
·e202500382
·
IF 3.5
Hongjie Song,Mengjiao Liu,Dan Li,Ran Chen,Qiong Zhou
The development of high-performance, low-platinum (Pt)-loading catalysts for the oxygen reduction reaction (ORR) remains a critical challenge in proton exchange membrane fuel cells. Zirconium dioxide-carbon composite materials are prepared using the Zr-based metal-organic framework UiO-66 as a precursor. The support structure is modulated by controlling the pyrolysis conditions (700 °C, 800 °C, and 900 °C). Platinum nanoparticles are deposited onto the ZrO 2 -carbon composite framework using ethylene glycol as the reducing agent, yielding low-Pt-content Pt/U-X catalysts (X = 700, 800, 900). The findings demonstrate that the Pt/U-X catalysts exhibit superior electrocatalytic activity compared with commercial Pt/C catalysts. Pt/U-800 displays the highest mass activity (796.9 mA mg Pt −1 ), which is 3.64 times higher than commercial Pt/C (219.2 mA mg Pt −1 ). Furthermore, Pt/U-800 achieves 1250 mA cm −2 at 0.6 V and reaches a peak power density of 1820 mW cm −2 in fuel cell tests. The one-step composite of ZrO 2 and carbon, formed through the pyrolysis of UiO-66, facilitates an interfacial structure between ZrO 2 and Pt, optimizing the hierarchical pore structure of the support, and providing a promising, cost-effective alternative to traditional Pt/C catalysts for fuel cell cathod. Graphical ZrO 2 –carbon composite supports were derived from UiO-66 (a Zr-based metal–organic framework, MOF) by pyrolysis. Pyrolysis temperature regulates graphitization and oxygen vacancies (O v ), strengthening Pt–support interactions. The optimized Pt/U-800 catalyst forms a Pt δ+ –O v –Zr 3+ interface and exhibits enhanced oxygen reduction reaction (ORR) activity with higher half-wave potential (E 1/2 ) and mass activity (MA) than commercial Pt/C.
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POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Yuxin Luo,Wenyi Yang,Zhanpeng Xie,Hang Zheng,Wanfen Pu,Feng Jiang
The viscosity and elasticity of water-soluble polymers are critical in the petroleum industry, particularly under high-temperature and high-salinity conditions. In this study, a multi-armed hydrazide-POSS (HPOSS) and a carbonyl-functionalized hydrophobic association polymer (CFHAP) were developed to create dual networks (CFHAP/HPOSS). Unlike conventional binary cross-linkers, HPOSS promoted the formation of dense and stable covalent cross-linked structures. Even at low concentrations of both CFHAP and HPOSS, CFHAP/HPOSS exhibited robust network formation with exceptional thickening properties, achieving a significantly higher viscosity of 3927 mPa·s at 2 g/L compared to the polymer's 410 mPa s and the binary cross-linking system's 2453 mPa s. Under a 40 g/L Na + solution, CFHAP/HPOSS exhibited salt responsiveness by enhancing their hydrophobic network, resulting in a viscosity of 5325 mPa s and a modulus G′ > G″. These enhanced rheological properties were further utilized to improve aqueous foam stability. The results revealed improved foam stability with an extended half-life time (8248 s), low drainage rate (0.0064 g/s maximum), and minimal bubble size distribution variation. SEM images also reveal a fully formed polymer film network, which effectively inhibits foam drainage and coarsening. Our strategy provides valuable insights into developing new materials with adjustable thickening and elastic properties. Highlights A multi-armed hydrazide-POSS is synthesized and used as a crosslinking agent. Dynamic acylhydrazone bond is used to fabricate a network with enough stability. Hydrophobic interaction is used to fabricate a network with salt responsiveness. The prepared polymer exhibits improved viscosity and elasticity.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Qing Li,Wei Li,Liping Lu,Xiayan Wang
Cortisol is an important biomarker in response to psychological stress. Detecting its content in biological samples is crucial for gaining insights into individual stress and personalized healthcare. The limitations of traditional techniques for cortisol detection make them unsuitable for rapid and real-time analysis, thereby motivating the development of alternative sensing strategies. Herein, we report a molecularly imprinted polymer (MIP) electrochemical sensor based on laser-induced graphene (LIG), fabricated via a one-step electropolymerization that integrates a Cu2+-l-histidine metal complex as intrinsic redox probes and 3,4-ethylenedioxythiophene (EDOT) as a conductive scaffold. The morphology, structure, electrochemical performance, and adsorption kinetics of the MIP film were systematically characterized. This MIP/LIG has a wide linear range of 0.05 to 100 μM, covering its physiological concentration range, with a detection limit as low as 5.6 nM, which is far below the lowest cortisol level in human sweat. Furthermore, it shows good selectivity for structurally similar steroid hormones and common sweat metabolites. Its excellent reproducibility, renewability, and long-term stability make it suitable for the detection of cortisol in both artificial and real human sweat, and the results are consistent with the physiological circadian rhythm changes. Importantly, this work first proposes the redox-active MIP using metal complexes, providing a new strategy for the development of electrochemical sensors for nonelectroactive substances.
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LANGMUIR
·
2026
·
IF 4.4
Guang Li,Lisha Zhang,Iram Hussain,Zhizhen Ye,Jin-Ming Wu
Semiconductor-based photocatalysis using TiO2, ZnO, and related materials offers a promising solution for efficient wastewater treatment through light-assisted advanced oxidation processes. In this study, oxygen vacancy (Ov)-rich ZnO micrometer-sized particles (ca. 0.5 μm) are grown on a conductive carbon cloth via a one-step molten salt method. The effects of different coordinating anions added into the molten salt on the morphological characteristics of the resultant ZnO crystallites are studied. The optimized photocatalyst (CC@ZnO-3 min) achieves near-complete degradation of 20 ppm ofloxacin within 2 h under UV irradiation and in the presence of 5 mM KHSO5 (PMS). In the absence of PMS, it removes 26% of total organic carbon (TOC) after 8 h─a 6-fold improvement over commercial ZnO with an average particle size of ca. 0.2 μm, which is also immobilized on carbon cloth with a similar loading mass of ca. 7.0 mg·cm–2. Radical trapping experiments reveal that superoxide (·O2–) and holes play dominant roles in the degradation process. The engineered oxygen vacancies not only enhance charge carrier separation but also significantly improve electron transfer efficiency. This work presents a strategy for developing high-efficiency photocatalysts to address pharmaceutical pollution.
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ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yinning Lin,Shuting Li,Huiping Yang,Qian Mo,Siying Lyu,Haikun Luo,Fan Yang,Xinchun Li,Fan Xia
Chiral metal–organic framework (CMOF)-based porous membrane materials have attracted great interest in the enantioseparation community. Despite remarkable progress, it remains a challenge to obtain functional membranes with a tunable enantioselectivity. Herein, we report on a photoresponsive and enantioselective nanoporous membrane prepared by in situ growth of azobenzene (Azo)-functionalized UiO-66 (UiO-66-Azo) onto anodic aluminum oxide (AAO) membrane. Tethering β-cyclodextrin (β-CD) to UiO-66-Azo/AAO via host–guest interaction created an efficient chiral hybrid nanochannel membrane, UiO-66-Azo@β-CD/AAO. The azo-rendered UV–vis photoswitch function could facilely realize assembly and disassembly of enantio-binding units, β-CD, enabling the enantioseparation capacity to refresh and improve the enantiomeric gating efficiency, and importantly, making the chiral membrane reusable. We demonstrated the utility of the chiral membrane by separation of S/R-naproxen enantiomer, gaining excellent enantioseparation performance, with an enantiomeric excess (ee) of 81.5% for S/R-naproxen. Molecular dynamics simulations were in agreement with the experimental findings. This work provides a low-cost and easy-to-mass-produce chiral nanochannel membrane for enantiomeric separation applications.
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ACS Applied Materials & Interfaces
·
2026
·
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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ACS Applied Polymer Materials
·
2026
·
IF 4.7
Shiyao Zhong,Ye Zhang,Xin Yang,Siyi Bi,Guangwei Shao,Nanliang Chen,Jinhua Jiang,Huiqi Shao
In addressing the enhancement needs for hydrophilic aerogels utilized in oil–water separation, with a particular focus on mechanical properties, filtration flux, and oil repellency, this study investigates the fabrication and performance modification of poly(vinyl alcohol)/silica (PVA/SiO2) hybrid nanofiber aerogels. A synergistic mechanism is established between molecular transport channels and size-sieving effects through systematic multiscale structural regulation. This results in aerogels featuring uniform fine-diameter fiber units, internally oriented large-pore channels, and micronano-tiered rough surfaces, achieving an optimized balance between selectivity and permeability while ensuring structural stability. Furthermore, based on the thickness-dependent filtration performance of the aerogel, an innovative dual-mode oil–water separation mechanism is demonstrated: thin-layer aerogels (0.5 mm) utilize gravity to achieve high-flux filtration of oil–water mixtures (pure water filtration flux >6500 L·m–2·h–1); while thick-layer aerogels (>2 mm) are driven by capillary-dominated reverse transport, efficiently adsorbing water from high-density oil phases (adsorption capacity >30.6 g·g–1). In contrast to the preceding studies, this research uses industrial engine oil for experimental purposes. The findings indicate that controllable switching between oil and water separation modes can be achieved through the simple adjustment of aerogel thickness. This finding broadens the application scope of the material and provides an efficient and reliable strategy for treating variable oil–water mixtures in industrial spill scenarios.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Ya-Qi Xue,Lei Wang,Yin Wang,Xiao Liu,Bin Lei,Xi-Ze Liu,Bo Li,Qian Yang,Jin Chang,Wei-Wei Ding,Jian-Gong Ma,Peng Cheng
Platinum-based hydrosilylation catalysts are primarily applied in the curing of silicone rubber. However, the commercial Karstedt catalysts used in industrial applications seriously suffer from rapid oxidation in air, uncontrolled activity at room temperature, rigorous storage conditions yet short pot-life, poor thermal stability, and complicated operation packages. Herein, Pt@MOFs, constructed by immobilizing catalytically active sites Pt inside the pores of a metastable MOF-based host with selected decomposition temperature, acts as a “controlled-release MOF-based capsule” to keep a long pot-life during storage and transport at ambient conditions, control the curing temperature of hydrosilylation, and releases the catalytically active Pt sites at required temperature for in situ polymer formation. Additionally, the unique nanosized crystalline MOF carriers are dominant for uniform dispersion in polysiloxanes and guarantee the excellent oxidation resistance in the Pt@MOFs catalytic system, which provides a new generation catalyst for widely used silicone rubber packages and an innovative pathway for the application of metastable MOF materials. Honeywell® has initiated kilogram-scale silicon rubber packages with Pt@MOFs.
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LANGMUIR
·
2026
·
IF 4.4
Xinhua He,Zijie Xia,Linlin Wang,Tianchen Shen,Wenqi Tan,Jianmin Shen,Linying Yuan,Zheng Jiao
The ubiquitous accumulation of antibiotics and synthetic dyes in aquatic environments has emerged as a critical threat to the ecological integrity and human health. Visible-light-driven photocatalysis represents a sustainable strategy for decontaminating such pollutants; yet, its practical efficacy is often hampered by narrow light-harvesting ranges and rapid photogenerated carrier recombination. Herein, a ternary photocatalyst, namely, CDs/UiO-66-NH2/BiOCl (CUCl), was rationally constructed by integrating carbon dots (CDs) into a UiO-66-NH2/BiOCl Z-scheme heterojunction. Serving as an efficient electron reservoir, the introduced CDs not only significantly extended the visible-light absorption range but also effectively suppressed carrier recombination. Under visible-light irradiation, the optimized CUCl catalyst achieved remarkable degradation efficiencies of 87.2% and 98.8% for tetracycline and rhodamine B, respectively, outperforming the binary UiO-66-NH2/BiOCl heterojunction and pristine BiOCl. Radical trapping experiments and photocatalytic mechanism investigations revealed that photogenerated holes (h+) and superoxide radicals (·O2–) were the dominant active species responsible for pollutant degradation. Moreover, the CUCl catalyst exhibited excellent structural stability and reusability, retaining more than 85% of its initial catalytic activity after four consecutive reuse cycles. This work provides a novel and viable strategy for fabricating high-efficiency, stable environmental photocatalysts via the synergistic integration of Z-scheme heterojunctions and carbon dot functionalization.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.2
Mingjia Feng,Yunhai Ma,Yuqi Zhuansun
Biomimetic design combined with multifunctional biodegradable materials provides a sustainable solution to improve mechanical strength, water resistance, and UV protection of biodegradable mulch. A concave lotus-leaf template was used to replicate micro/nanostructures on a poly(vinyl alcohol)/sodium lignosulfonate/cellulose nanocrystal/urea matrix. The film was then coated with carnauba wax, producing a superhydrophobic surface with a contact angle of 138.7°. The swelling ratio decreased by 48.76%, and the water–vapor transmission rate was markedly reduced, indicating a strong barrier performance. It also showed high mechanical strength (51.43 MPa) and an ultraviolet shielding efficiency of about 99%. Seed germination and growth tests demonstrated a sustained urea release. They also showed effective moderation of the soil temperature and moisture. Pakchoi germination reached 84%, and the overall plant quality improved significantly. The film degraded by 69.26% within 60 days. Overall, this biomimetic biodegradable mulch combines high performance with environmental compatibility for sustainable agriculture.
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CURRENT ISSUES IN MOLECULAR BIOLOGY
·
2026
·Vol. 48
·期 2
·195
·
IF 4.1
Yunting Deng,Yannan Zhang,Bowen Yan,Jinhai Huo,Weiming Wang
In this study, the structure of Walnut green husk polysaccharides (WGHP) and their effects on immune checkpoint inhibitor induced colitis (ICIIC) and intestinal microbiota in mice were studied. The results showed that WGHP was composed of mannose (Man) 0.56%, rhamnose (Rha) 6.81%, galacturonic acid (GalA) 53.52%, glucose (Glc) 8.93%, galactose (Gal) 13.94%, arabinose (Ara) 15.88% and fucose (Fuc) 0.35%. The results of animal experiments showed that the intake of WGHP could not only effectively improve the phenotype of ICIIC in mice, but also significantly regulate the composition of intestinal flora and the content of short-chain fatty acids in mice, such as regulating the ratio of Firmicutes/Bacterotoides, Lachnospiraceae NK4A136 group, Lactobacillus, and increasing the content of butyric acid, acetic acid, and isobutyric acid to restore intestinal homeostasis. In addition, WGHP improves inflammation in mouse ICIIC by inhibiting the secretion of pro-inflammatory cytokines TNF-α and IL-1β, thereby activating the GPR43/PD-1/PD-L1 signaling pathway. Therefore, WGHP can be used as a functional polysaccharide for the prevention of ICIIC.
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Water
·
2026
·Vol. 18
·期 3
·321
·
IF 3
Xueying Li,Asfandyar Shahab,Jinxiong Chen,Wei Li,Hua Zhang,Dunqiu Wang,Xinyu Tang,Mingxin Bin,Licheng Peng,Abubakr M. Idris
The widespread use of antibiotics has taken a heavy toll on the environment, which cannot be ignored. Tetracycline antibiotics (TCs), as representative pharmaceutical contaminants, have emerged as a growing environmental concern due to their persistence and potential ecological risks. This study utilized 1,3,5-benzenetricarboxylic acid (BTC) as a functionalizing reagent to synthesize magnetic nanoparticles NiFe2O4-COOH. These were then combined with Zr-MOF to create the magnetic adsorbent designated as NCF@Zr-MOF (where NCF represents carboxyl-functionalized nickel ferrite). Magnetic solid-phase extraction (MSPE) technology was employed to remove two representative tetracycline antibiotics, tetracycline (TC) and chlortetracycline (CTC) from the environment. The Langmuir model fitting revealed maximum adsorption reached 190.85 and 196.32 mg/g for TC and CTC, respectively, both of which conformed to the pseudo-second-order model during the adsorption process with spontaneous, heat-absorbing and entropy-increasing properties. Furthermore, following five cycles of adsorption and desorption, the removal rate for TCs was found to have decreased by 30%, yet the removal of CTCs remained at 95.32%. This adsorbent enables rapid separation via an external magnetic field. With its excellent stability and reusability, NCF@Zr-MOF shows great potential for removing antibiotics from water.
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