JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Jinyang Chen,Xiaoyu Lin,Wei Wang,Li Gan,Zuliang Chen
The microbial reduction of graphene oxide (GO) represents a sustainable approach for producing functional nanomaterials, yet the mechanisms in Gram-positive bacteria remain poorly understood. In this study, Lysinibacillus sphaericus HJ-3 was shown to effectively reduce GO through both direct cytochrome-mediated electron transfer and flavin-dependent shuttling. Whole-genome sequencing revealed complete respiratory chain and flavin biosynthesis pathways, while metabolomic profiling indicated enrichment of riboflavin and aromatic amino acid metabolism under GO stress. qRT-PCR analysis further confirmed the upregulation of key electron transport genes, particularly c-type cytochromes, during GO reduction. Control experiments, including abiotic, heat-killed, and non-reducing Gram-positive strains, verified that the process is a genuine biotic activity requiring metabolic viability. Together, these findings provide multi-omics evidence for the extracellular electron transfer mechanism of GO reduction in L. sphaericus and highlight its adaptive responses to redox stress. Importantly, the study demonstrates that endogenous flavins act as efficient electron shuttles to enhance electron transfer, thereby facilitating the microbial reduction of GO. This work not only deepens the understanding of extracellular electron transfer in Gram-positive bacteria but also underscores the potential of microbial strategies as green and scalable approaches for advanced graphene-based materials.
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DYES AND PIGMENTS
·
2026
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IF 3.9
Xin Zeng,Ranran Bu,Fengjiao Zhao,Yan Ding,Haizhen Song,Hongming Yin
Photoresponsive functional materials, especially photochromic materials, have recently emerged as key players in advancing cutting-edge optical applications. The photochromic film AQ-2-COOH-PMMA was prepared by introducing 2-anthraquinonecarboxylic acid ( AQ-2-COOH ) into the poly(methyl methacrylate) ( PMMA ) matrix. The AQ-2-COOH-PMMA film immediately exhibits a distinct color change (300 ms) under 365 nm UV light, demonstrating rapid photo-induced patterning ability and fine image formation. The images on the film exhibit reversible behavior. When heated in a 110 °C oven for 10 min, the written pattern is completely erased. The film exhibits excellent fatigue resistance, maintaining reproducible coloring-decolorization behavior for at least 10 consecutive cycles without significant performance degradation. This work provides a cost-effective, feasible and efficient strategy for developing information storage materials with rapid light response capability, excellent thermal reversibility and anti-fatigue properties.
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ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Jian Cai,Wei Deng,Ziyu Zhu,Long Zheng,Mimi Sun,Chong-Bo Ma,Jing Bai,Xiangjie Bo,Ming Zhou
By fusing wearable sweat sensors for on-body sweat monitoring with textiles for daily wear, wearable textile sweat sensors (WTSSs) demonstrate the distinctive capability to monitor perspiration in real time while engaging in daily activities. However, previous WTSSs mainly focused on “weave-in-textile” or “print-on-textile” ones, which are permanently immobilized on specific regions of specific types of textiles prior to use and, accordingly, cannot be used in some specific routine circumstances (e.g., temporary changes in textile type/immobilization region). Here, in an alternative “stick-to-textile” approach, the first example of a single carbon microyarn-based integrated WTSS that is built into a hook-and-loop fastener (SI@HLF) for on-body, dynamic, and multiplexed sweat monitoring is reported. This system integrates a surface-engineered, loop-based antigravity transport module for directional sweat transport; a single carbon microyarn-based sensing array module for sweat biomarker analysis; a printed circuit board (PCB)-based data processing module for monitoring and control; and an adhesive module based on a patterned adhesive film on the loop for universal immobilization. We tested the performance of SI@HLF in healthy subjects under controlled trials simulating daily exercise. We also evaluated the utility of SI@HLF when immobilized on various types of textiles and textile regions during routine activities.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 2
·94
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IF 5.3
Cai Minghui,Zhang Wenwen,Yao Haixu,Su Huiyu,Cao Yang,Li Jiaxin,Min Xinyu,Cui Feiyun,Zhu Hui
Thrombotic diseases remain a major global health concern with high morbidity and mortality. Four biomarkers (TAT, t-PAIC, TM, PIC) enable real-time monitoring of coagulation, addressing limitations of traditional diagnostics. Herein, we developed a multiplex electrochemical immunosensor for the simultaneous detection of these biomarkers. The sensing platform is constructed on a glassy carbon electrode modified with gold nanoparticles and laser-induced graphene (AuNPs-LIG), which enhances conductivity and signal output. A “One-for-Four” strategy was employed using four distinct redox probes (AQ, OAP, MB, PPD), each conjugated to a specific antibody via amidation and anchored to functionalized carbon nanotubes (Au@CNTs), forming a multichannel signal amplification system with high sensitivity. The immunosensor exhibited excellent linearity (10–100 ng/mL, R 2 > 0.98) and low detection limits: 3.99 ng/mL (TAT), 5.25 ng/mL (t-PAIC), 2.51 ng/mL (TM), and 4.20 ng/mL (PIC). It also demonstrated high selectivity, reproducibility and long-term stability. Recovery in human plasma ranged from 84.1% to 112.21%, indicating strong applicability to complex clinical samples. This work presents a robust, portable POCT platform with great potential for early diagnosis and dynamic monitoring of thrombotic diseases. Graphical
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
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IF 11.357
Man Chen,Quanhua Cai,Xiangyu Chen,Shaofu Huang,Qinyuan Feng,Tetsuro Majima,Raymond Jianxiong Zeng,Shungui Zhou
Semiartificial photosynthesis shows great potential in solar energy conversion and environmental application. However, the rate-limiting step of photoelectron transfer at the biomaterial interface results in an unsatisfactory quantum yield (QY, typically lower than 3%). Here, an anthraquinone molecule, which has dual roles of microbial photosensitizer and capacitor, was demonstrated to negotiate the interface photoelectron transfer via decoupling the photochemical reaction with a microbial dark reaction. In a model system, anthraquinone-2-sulfonate (AQS)-photosensitized Thiobacillus denitrificans, a maximum QY of solar-to-nitrous oxide (N2O) of 96.2% was achieved, which is the highest among the semiartificial photosynthesis systems. Moreover, the conversion of nitrate into N2O was almost 100%, indicating the excellent selectivity in nitrate reduction. The capacitive property of AQS resulted in 82–89% of photoelectrons released at dark and enhanced 5.6–9.4 times the conversion of solar-to-N2O. Kinetics investigation revealed a zero-order- and first-order- reaction kinetics of N2O production in the dark (reductive AQS-mediated electron transfer) and under light (direct photoelectron transfer), respectively. This work is the first study to demonstrate the role of AQS in photosensitizing a microorganism and provides a simple and highly selective approach to produce N2O from nitrate-polluted wastewater and a strategy for the efficient conversion of solar-to-chemical by a semiartificial photosynthesis system.
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RESEARCH IN MICROBIOLOGY
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2022
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IF 3.946
Yuanyuan Song,Ziqi Wang,Yijing Long,Yang Mao,Feng Jiang,Yuanyuan Lu
Candida albicans can form biofilm on biotic and abiotic surfaces of medical implants to cause superficial and systemic infections under specific condition. The formation of hyphae and matrix of C. albicans are considered as probable virulence factors . We assessed the inhibitory activities of 26 anthraquinones against C. albicans biofilm formation, which were substituted by different functional groups including hydroxyl groups, amino groups, carboxyl groups, alkyl groups, and glycoside groups at C1- or C2-position. Among them, anthraquinones without substituents at other positions but only an alkyl group attached to C2-position, namely 2-alkyl-anthraquinones were determined to have significant anti-biofilm activities. Furthermore, 2-ethylanthraquinone can significantly affect genes related to extracellular matrix ( PMT6 and IFD6 ), and hyphal formation ( HWP1 , ECE1 and EFG1 ), leading to the disrupted formation of biofilm, by detail transcriptomics analysis. We believed that 2-ethylanthraquinone could inspire more discoveries of anti-biofilm agents against C. albicans .
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SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Yangyang Liu,Tao Wang,Xiaozhong Fang,Yue Deng,Hanyun Cheng,Aziz-Ur-Rahim Bacha,Iqra Nabi,Liwu Zhang
The rapid sulfate formation is a crucial factor determining the explosive growth of fine particles and the frequent occurrence of severe haze events in China. Recent field observations also show that brown carbon is one of the most critical components in aerosol particles sampled during haze episodes. To this day, there is limited knowledge that accesses the role of brown carbon in atmospheric chemistry . In fact, these carbonaceous particulate matters , mainly derived from forest fires, biomass burning , and biogenic release, can act as photosensitizers and produce varieties of active intermediates to alter oxidation capacity. Experimental results in this work provide evidence that hydroxyl radical (∙OH) stems from brown carbon proxies fulvic acid /humic acid (FA/HA) upon irradiation, leading to rapid SO 2 oxidation on brown carbon particles in the atmosphere. Further correlation analyses for sulfate formation and chromophore properties of 12 model compounds demonstrate that brown carbon particles with higher aromaticity and E 2 /E 3 (the ratio of absorbance at 254 nm to that at 365 nm) would facilitate ∙OH production and SO 2 photo-oxidation. Uptake coefficient measurements and sulfate production rate estimation indicate that brown carbon could gain importance in atmospheric SO 2 oxidation. A better understanding of SO 2 uptake kinetics on brown carbon surfaces favors in defining new regulations to improve air quality and reduce the harmful effects of haze events on resident health and the environment.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lu-Yan Zhang,Chen-Hao Cui,Shan-Shan Yang,Yan Li,Han-Jun Sun,Nan-Qi Ren,Jie Ding
The development of sustainable and efficient wastewater treatment technologies is vital for tackling the challenges posed by high salinity and antibiotic-contaminated industrial wastewater. In this study, a highly active, metal-free photocatalyst (AQ@CN) was successfully synthesized via a simple and environmentally friendly method. Under conditions of high chloride ion (Cl - ) concentration, AQ@CN exhibited a for significantly enhanced degradation rate constant for sulfadiazine (SDZ), achieving a rate five times higher than that of g-C 3 N 4 . Mechanistic investigations identified superoxide radicals ( • O 2 – ), dichloride radicals ( • Cl 2 - ), and photogenerated holes (h + ) as the primary reactive species. Photoelectrochemical experiments and density functional theory (DFT) calculations revealed that the incorporation of anthraquinones (AQs) optimized local electron density, facilitating the separation of photogenerated carriers and enhancing the electron transfer rate. Furthermore, the degradation pathway of SDZ was proposed, and the toxicity of the degradation products was substantially reduced. This study offers an effective strategy to enhance the performance of metal-free photocatalysts, providing a robust theoretical and technical foundation for pollutant degradation in complex high-salinity industrial wastewater.
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Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Yuxin Li,Shiqi Yang,Zihan Liu,Yiyang Pan,Pengfei Zhang,Zhiqiu Qu,Chao Shan
Humic substances (HS) modification favors the reactivity of nanoscale zero-valent iron (nZVI) for water decontamination from nitro-compounds like nitrobenzene (NB), whereas the structural complexity of HS hinders the elucidation of its mechanism. Herein, anthraquinone-2-carboxylic acid (AQC) was employed as a typical model molecule for HS. Through AQC modification, the water contact angle of nZVI evidently increased from 6° to 19°-46°, and the rate constant and electron efficiency for NB reduction under aerobic condition was substantially elevated by 6-10.3 times and 2.5-2.8 times, respectively. Among the AQC-modified nZVI materials with varied molar ratios of AQC/Fe (0.1-3%), 1% AQC-nZVI not only exhibited the optimal reactivity and electron efficiency, but also demonstrated enhanced reactivity for various nitroaromatic compounds. Moreover, AQC modification could advance the complete reduction of NB by nZVI to aniline and minimize the accumulation of intermediates. In addition, AQC-nZVI materials could maintain an excellent reduction efficiency over a wide pH range (4-9). Mechanistically, the increase of surface hydrophobicity of nZVI owing to AQC modification promoted the adsorption affinity for NB and redirected more electron transfer to NB. Leveraging both anthraquinone and carboxylic groups, AQC served as electron shuttle to mediate the electron transfer from nZVI to NB whilst accelerating the Fe(II)/Fe(III) circulation. Electrochemical impedance spectroscopy revealed a pronounced decrease in the charge transfer resistance of nZVI from 381.4 Ω to 252.8-337.4 Ω due to AQC modification, thereby facilitating the interfacial electron transfer. This study offers insights into the HS-enhanced reactivity and selectivity of nZVI for water decontamination from nitroaromatic compounds.
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ANALYTICA CHIMICA ACTA
·
2024
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IF 5.7
Ning Xia,Fengli Gao,Gang Liu,Yong Chang,Lin Liu
Background Small molecule mimics offer the advantages of easy preparation, good thermodynamic stability, and reproducible catalytic activity. However, most of the reported organic artificial mimics face challenges including low catalytic activity, oxidative self-destruction, and auto-aggregation into inactive dimers. Therefore, novel organic mimics with high catalytic activity as well as good thermal and environmental stability are highly desirable. Results We found that pyrroloquinoline quinone (PQQ), a nutritionally important growth factor, displayed significant peroxidase-like activity to catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxidized TMB (oxTMB) by H 2 O 2 . Its catalytic activity surpassed that of other organic small molecules reported previously, including fluorescein derivatives and adenosine/guanosine triphosphate. Based on the reduction of oxTMB by the enzymatically generated ascorbic acid (AA), the PQQ/TMB-based system was used to monitor alkaline phosphatase (ALP) activity with ascorbic acid 2−phosphate (AAP) as the substrate. This sensing system allowed for the determination of ALP with a detection limit of 1 mU/mL. Furthermore, we discovered that PQQ can coordinate with Cu 2+ to form metal-organic nanoparticles. The building blocks of two active cofactors endowed the nanoparticles with impressive functionalities for biocatalytic applications. With Cu-PQQ nanoparticles as signal labels, colorimetric immunoassays of prostate specific antigen (PSA) were achieved with a lowest detectable concentration down to 0.1 pg/mL. Significance This work is valuable for the design of novel biosensors by utilizing PQQ as an artificial enzyme because of its high catalytic activity, good stability, ease of storage, and simple chemical structure.
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