SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Qingyin Feng,Xueping Zhao,Zhuoya Zhang,Hai Zhang,Pucun Bai
A flexible γ-CuI/AZO p-n heterojunction UV photodetector was successfully fabricated on a PEN substrate. • Self-powered UV detection with R of 4 mA/W, D* of 2.62 × 10 11 Jones, and fast rise time and decay time (306/116 ms). • The heterojunction exhibits excellent mechanical durability, maintaining stable photoresponse after 500 bending cycles. Flexible ultraviolet (UV) photodetectors have broad application prospects in wearable electronics and low-power optoelectronic systems. In this work, a self-powered UV photodetector based on a γ-CuI/AZO p-n heterojunction was successfully fabricated on a flexible polyethylene naphthalate substrate. Both γ-CuI and AZO films exhibit high visible-light transmittance with optical bandgaps of 3.03 eV and 3.28 eV, respectively, rendering them suitable for UV detection. The device demonstrates distinct rectification behavior in the dark and a markedly enhanced photoresponse under 365 nm UV illumination, achieving stable self-powered operation at 0 V bias. Under a 0 V bias and an incident power density of 103.2 mW/cm 2 , the device demonstrates rise and decay times of 306 ms and 116 ms, respectively. At 33.4 mW/cm 2 , the device achieves a responsivity of 4 mA/W and a specific detectivity of 2.62 × 10 11 Jones, confirming its effective self-powered UV detection capability. Furthermore, cyclic bending tests under a fixed 5-mm radius curvature revealed that the device maintains distinguishable photoresponse after 500 bending cycles, demonstrating robust mechanical tolerance and reliable photodetection under fatigue deformation. This work provides a feasible route for the construction of flexible self-powered UV photodetectors based on p–n heterojunctions. Download: Download high-res image (157KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jiawei Wu,Silin Yang,Yongping Li,Liwei Liu,Junle Qu,Jun Song,Jiaqing Guo
NSCDs show a 180-fold intensity change and an 80 nm polarity-induced red shift. • NSCDs target LDs and enable sustained imaging of individual LDs. • Live-cell imaging captured individual LD metabolic responses and fusion-like remodeling. Lipid droplets (LDs) undergo remodeling of their polarity microenvironment during abnormalities in lipid metabolism, accompanied by changes in LD abundance and size. However, the narrow ranges of polarity response, insufficient targeting specificity, and limited stability of existing probes hinder the dynamic and accurate monitoring of individual LDs. Here, we developed nitrogen and sulfur codoped carbon dots (NSCDs) for monitoring polarity-related microenvironmental responses of individual LDs under metabolic perturbations. NSCDs exhibited a solvent-dependent decrease in fluorescence intensity and an approximately 80 nm red shift in emission. NSCDs were rapidly internalized and preferentially localized in LDs. Nutrient deprivation and inhibition of triacylglycerol synthesis decreased area-normalized NSCDs fluorescence, whereas OA-induced lipid accumulation increased it, reflecting distinct polarity-related microenvironmental responses. Furthermore, time-lapse imaging captured local events resembling LD fusion during SR59230A treatment, accompanied by enhanced local fluorescence during these remodeling events. These results support the use of NSCDs for dynamically monitoring polarity-related microenvironmental responses of individual LDs under metabolic perturbations Download: Download high-res image (127KB) Download: Download full-size image
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Small
·
2026
·
IF 11.8
Ziqi Dong,Feng Niu,Zeqi Wu,Xiaofan Zhou,Junyan Li,Dilshod Nematov,Saidjafar Murodzoda,Huaizhou Jin,Da Chen
The activation of inert C(sp 3 )-H bonds is the rate-determining step in photocatalytic selective oxidation of toluene, and the easy over-oxidation of target products makes it a great challenge in green organic synthesis. Herein, we report a semi-heterogeneous CeCl x -NHPI complex, which is constructed via the coordination of CeCl 3 and N-Hydroxyphthalimide (NHPI) for the efficient visible-light-driven selective oxidation of toluene to benzaldehyde under ambient conditions. Impressively, the catalyst achieved a maximum benzaldehyde formation rate of up to 2 mmol·g −1 ·h −1 in 5 h, with a benzaldehyde selectivity of 80.6%. Mechanistic studies show that the chlorine radicals (Cl·) generated from the coordinated Ce─Cl bond via the ligand-to-metal charge transfer (LMCT) process, and the phthalimide-N-oxyl (PINO) radicals formed from NHPI via single-electron transfer jointly promote the efficient activation of the inert C(sp 3 )-H bond in toluene. In addition, the CeCl x -NHPI complex exhibits good recyclability and broad substrate tolerance for the selective oxidation of various toluene derivatives. This work provides a novel strategy for the design of efficient rare earth-based semi-heterogeneous photocatalysts for the activation of C(sp 3 )-H bonds.
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高影响因子
ENERGY & FUELS
·
2026
·Vol. 40
·期 34
·19056-19065
·
IF 6
Yang Tao,Zhu Xiaofeng,Zhang Shicheng
The large-scale production of sustainable
aviation fuels
(SAFs)
heavily relies on hydrogen supply, while traditional hydrogen storage
and delivery suffer from safety risks and high cost. Hydrogen peroxide
(H 2 O 2 ) is regarded as a promising hydrogen carrier,
which can be produced on-site through a green electrochemical two-electron
oxygen reduction reaction (2e – ORR). Herein, oxygen,
nitrogen co-modulated carbon (O-NC) catalysts were fabricated by doping
N dopants and oxygen-containing functional groups (OFGs). The pyrrolic
N is revealed to jeopardize the electronic structure of the NC catalyst,
and the OFGs can further regulate the NC matrix for 2e – ORR. As a result, the optimized O-NC-5 catalyst exhibits an excellent
H 2 O 2 selectivity of over 80% in both alkaline
and neutral electrolytes. After further optimizing Nafion content,
catalyst loading, and operating conditions of O-NC-5-based gas diffusion
electrodes, the assembled flow cell can deliver a high H 2 O 2 yield of 3.4 mol g cat –1 h –1 and Faradaic efficiency of above 90%, with
robust stability over 12 h. This work reveals the synergistic effects
of N dopants and OFGs toward 2e – ORR performance
and offers a feasible strategy to develop high-performance carbon
electrocatalysts and practical electrode systems for green H 2 O 2 production, which supports the SAF synthesis.
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INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 33
·19601-19611
·
IF 4.6
Zhang Shi-Rui,Wang Xiao-Ming,Xie Zi-Juan,Xia Yuan-Guang,Cheng Zhao-Yi,Yin Wen,Li Jia-Chen,Zhang Hu,Yang Zu-Pei,Kuang Xiao-Jun,Jiao Huan
Mixed-anion defect engineering is
an effective strategy
for tuning
local structures and ion transport in complex oxides. Herein, we report
the Li 3 N-assisted synthesis of the oxynitride La 24 Li 23 Ti 5 O 53 N 3 (LLTON)
and clarify the role of O/N incorporation in defect reconstruction
and Li-ion migration. Structure analyses reveal that nitrogen preferentially
substitutes apical oxygen sites in Li/Ti octahedra, inducing Li-site
redistribution and oxygen-vacancy formation. These coupled defects
reconstruct the local coordination environment and disrupt the ordered
defect arrangement of the parent oxide while retaining the tetragonal
framework. Variable-temperature diffraction further reveals a thermally
driven structural evolution involving Li-site reorganization, enhanced
positional disorder in the fluorite-related lithium sublattice, and
a halving of the crystallographic repeat along the c direction. Ab
initio molecular dynamics (AIMD) and bond valence site energy (BVSE)
calculations show that these defect-induced and thermally activated
rearrangements lower the Li-ion migration barrier and promote preferential
one-dimensional migration along the c direction. Consequently, LLTON
delivers an ionic conductivity of 3.78 mS cm –1 at
400 ° C, with the activation energy reduced from 0.88 to 0.67
eV. This work establishes a structure–defect–evolution–transport
correlation in mixed-anion oxides and highlights O/N defect engineering
as a useful approach for regulating ion migration in complex oxide
materials.
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Materials
·
2026
·Vol. 19
·期 10
·2029
·
IF 3.7
Changsheng Ye,Xin Shan
Ionic thermoelectric (i-TE) materials have attracted increasing attention for low-grade heat harvesting owing to their high thermovoltage output under small temperature gradients. However, the development ofn-type i-TE materials remains challenging. Electrode-enabled polarity regulation provides a promising alternative to material-design strategies for developingn-type i-TE devices. In this work, a poly(vinyl alcohol) (PVA)-based ionic hydrogel was prepared with dimethyl sulfoxide (DMSO) and potassium chloride (KCl) through a freeze–thaw process, and its thermoelectric behavior was regulated by electrodes. While the i-TE hydrogel device with typical Cu electrodes exhibitedp-type behavior, replacing the electrodes with graphite paper (GP) electrodes converted the device response fromp-type ton-type. Morphological and spectroscopic analyses suggest that the GP surface selectively adsorbed K+ions through cation–π interactions, suppressing cation thermodiffusion and enabling Cl−-dominated ion migration under a temperature gradient. As a result, the PVA-GP device achieved a maximumSiof −4.36 ± 0.26 mV K−1. In addition, the device exhibited favorable thermoelectric output, with a maximumPFiof 57.668 μW m−1K−2, a room-temperatureZTof 0.0864, and a peak transient power density of 2.33 mW m−2during short-time discharge. Owing to the large interfacial area of the GP electrodes, the device could also function as an ionic thermoelectric supercapacitor with appreciable energy-storage capability. This work demonstrates an effective electrode-engineering strategy for constructingn-type i-TE devices and provides a feasible route for simultaneous low-grade heat harvesting and transient energy storage.
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高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Weiwei Jin,Tiancheng Jin,Zhicheng Hu,Haoran Tang,Fei Huang
Organic electrochromic materials are particularly distinguished by their adjustable coloration and solution processability, showing significant potential in the domains of smart windows and automotive applications. Conductive polymer-based electrochromic devices can achieve color-rich and high-performance devices by altering the material structure. However, traditional electrochromic devices face challenges such as non-black coloration, cumbersome preparation process and electrode corrosion problems. To address these issues, this study applies a novel n-type conducting polymer poly(benzodifurandione) (PBFDO) as one electrochromic layer and introduces a ferrocene-based redox couple into the ion-transporting electrolyte film. The resulting bilayer black devices achieve complete electrochromic cycles via PBFDO reduction and redox couple oxidation. High-quality PBFDO films with controllable thickness, neutral gray-black color, and robust adhesion to ITO substrates were confirmed. The devices exhibit broad-spectrum modulation, good electrochromic performance, excellent cyclic stability (50 000 cycles), and superior heat insulation performance. This innovative approach streamlines the fabrication process on a large scale and offers substantial support for their practical deployment.
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Current Analytical Chemistry
·
2024
·Vol. 22
·期 1
·84-91
·
IF 1.7
Si Chen,Yiming Nie,Qing Liu,Fang Chen
Background4-n-butylresorcinol (4nBR) was widely used in the treatment of chloasma and skin whitening cosmetics. As a decolorizing agent, it can effectively control the activity of tyrosinase. Market regulatory authorities require truthful labeling of ingredients in cosmetics. Therefore, the quantitative determination of 4nBR is of great practical significance.HypothesisAt present, the main detection method of 4nBR reported in the literature is HPLC. Compared with the HPLC method, optical methods offer several advantages, including low cost, and simplicity, which make them suitable for on-field detection applications. A convenient spectrophotometric method was established for 4nBR detection.MethodsFe3+ can oxidize the common colorless chromogenic substrate 3,3',5,5'-tetramethylbenzidine (TMB) to blue oxTMB. Based on the fact that 4-n-butyl resorcinol (4nBR) can reduce oxTMB, a convenient and rapid spectrophotometric method for the determination of 4nBR was proposed.ResultsUnder the optimum conditions, the absorbance at 652 nm has a good linear relationship with the concentration of 4nBR in the range of 1.2 - 16 μM. The linear equation for the detection of 4nBR was ΔA = 0.0546 c (μM) - 0.0026 (r2=0.9962), and the detection limit was 0.33 μM. The accuracy of this method is comparable to that of HPLC.ConclusionThis method has good selectivity for 4nBR and good anti-interference ability for common additives in cosmetics. The proposed method can be applied to the determination of 4nBR in thereal samples.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Linyu Zhang,Mianyuan Wu,Yushui Han,Xuefeng Bai
Co/PDA-Al 2 O 3 precursors were prepared via a NaBH 4 reduction process with polydopamine-modified alumina (PDA-Al 2 O 3 ) as the carrier. Co 4 Pd/PDA-Al 2 O 3 catalysts were prepared via the galvanic replacement reaction (GRR) method with Co/PDA-Al 2 O 3 as the template and reducing agent. The above-prepared catalysts were analyzed for composition, structure, and morphology. The abundant N and O groups on the PDA-Al 2 O 3 surface anchored Co NPs, which promoted the uniform distribution of PdCo NPs with an average particle size of 2.92 nm. Ultrafine PdCo NPs and the coordination and strain effects between Pd and Co enhanced the catalytic performance of dodecahydro-N-ethylcarbazole (12H-NEC) dehydrogenation. The dehydrogenation efficiency of 12H-NEC catalyzed by Co 4 Pd/PDA-Al 2 O 3 achieved 100% at 180 °C for 4 h, and 98.45% at 170 °C for 6 h. The catalytic performance of 12H-NEC continuous dehydrogenation was evaluated in the fixed-bed reactor using Co 4 Pd/PDA-Al 2 O 3 as catalyst. The dehydrogenation efficiency was maintained at 95.4% for 100 h, indicating the excellent stability.
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MACROMOLECULES
·
2026
·
IF 5.7
Chi Li,Jiayu Yu,Wei Jiang,Jing jin,Xiangling Ji,Yanxiong Pan
Looped or cyclic polymers without chain ends exhibit unusual physicochemical properties and have been explored for emerging applications in surface coatings, nanolithography and electronic patterning, and drug or gene delivery. However, there is little information reported on the topological effect of the thermoresponsive looped brush on corresponding properties. Herein, two types of poly(N-isopropylacrylamide) (PNIPAM) terminated with one and two thiol groups are selected to bond with gold chips to form linear and looped PNIPAM brushes. The difference in conformational transition and protein adsorption behaviors for the two types of brushes at different temperatures has been evaluated using quartz crystal microbalance with dissipation measurements. The looped brushes exhibit anomalous hydration retention and negligible thermal hysteresis. Crucially, looped topology overcomes dehydration by enforcing extended conformations that can sustain the hydration barriers during collapse and further reduces protein adsorption. This work provides new insights into understanding the impact of different topological structures on conformational transitions and the corresponding protein adsorption, enriching the scope of research on temperature-responsive polymers.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.7
Hao Fang,Yuan Li,Haotian Cheng,Shiyi Song,Fuping Lu,Yi-Heng P. Job Zhang
Lacto-N-biose I (LNB), a core structural unit of human milk oligosaccharides, was usually fermented by microbial cell factories because its biosynthesis involved the supplies of ATP and UDP-sugars. Here we designed an in vitro ATP- and UDP-sugar-free enzymatic pathway for the biosynthesis of LNB from lactose and N-acetylglucosamine (GlcNAc). Thermoclostridium caenicola cellobiose phosphorylase was discovered to have a very high promiscuous activity of lactose phosphorylase. Its lactose phosphorylase activity was enhanced greatly by directed evolution, yielding the variant M2 (N654A/Y501A) having 1.56-fold higher lactose activity and doubled lactose/cellobiose specificity. The coenzyme-free three-enzyme molecular machine containing lactose phosphorylase M2, lacto-N-biose phosphorylase and polyphosphate glucokinase produced up to 115 g/L LNB from lactose and GlcNAc and exhibited the highest volumetric productivity of 14.4 g/L/h. This coenzyme-free multienzyme molecular machine could provide a cost-competitive platform for in vitro biomanufacturing of LNB.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Longyu Qiu,Menggang Li,Fenyang Tian,Lin He,Wenxin Zhu,Fengyu Wu,Xue Ren,Tongbo Zhang,Zhekai Zhang,Shipeng Zhang,Jiecai Han,Weiwei Yang,Yongsheng Yu
Proposing an in-plane N-bridged structure for atomic-level robust coordination. • Strong orbital overlap redirects hydroxy adsorption from Ni/Fe sites to Ru atoms. • Optimized coordination alleviates scaling relations and suppresses Ni site oxidation. • AEMWE achieves 2 A cm 2 at 1.84 V with ultra-stable operation over 800 h. The pursuit of high-performance anion exchange membrane water electrolysis (AEMWE) catalysts is limited by conventional supported and lattice-doped materials, which suffer from weak interfacial coupling and suboptimal intermediate adsorption, leading to degradation under industrial conditions. Although atomic-level modulation is highly appealing, achieving a synergistic balance between robust structural stability and precise control over the reaction pathway remains challenging. Herein, by employing a nitrogen-coordinated metal bridging strategy, we report a Ru-NiFeN with atomically coordinated Ru-N bridges for practical water electrolysis. This configuration manipulates the local electronic microenvironment to trigger a site-specific redirection of OH adsorption from Fe to Ru centers, effectively bypassing host-lattice scaling-relation limitations and lowering OER barriers. In-situ spectroscopy and theoretical calculations reveal that the Ru-N bridge promotes resilient dynamic structural reconstruction, enabling potential-triggered NiOOH formation while suppressing detrimental metal oxidation. The Ru-NiFeN catalyst achieves a low overpotential of 340 mV at 1 A cm 2 and demonstrates outstanding AEMWE durability, operating for over 800 h at 2 A cm 2 with a decay rate of only 24.4 μV h 1 , positioning it among the most active catalysts reported. This work provides a strategic pathway for optimizing adsorption landscapes via atomic coordination engineering for efficient, stable energy conversion. Download: Download high-res image (191KB) Download: Download full-size image
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