IONICS
·
2025
·
IF 2.6
Li Zhongyong,Zhang Dandan,Xiao Dong,Fan Hui,Mishra Yogendra Kumar,Xiong Jian
As an iron-based fluorophosphate with a two-dimensional layered structure, Na₂FePO₄F (NFPF) has become an ideal cathode material for energy storage applications due to its low cost, high safety, and structural stability. However, the inherently low conductivity and limited kinetic behavior of NFPF result in inferior electrochemical performance, which hinders its commercialization. Herein, we employed a one-step carbon–nitrogen co-doping method to modify NFPF. First, carbon coating effectively enhances the conductivity of the NFPF cathode. Moreover, nitrogen doping introduces additional vacancies and active sites in the carbon layer, providing more Na⁺ diffusion channels. The NFPF/PVP material, synthesized using polyvinylpyrrolidone (PVP) as both the nitrogen and carbon source, delivers a specific capacity of 119 mAh g⁻ 1 at 0.1 C, an excellent rate capability of 90 mAh g⁻ 1 at 10 C, and unprecedented long-term cycling stability (81.9% capacity retention after 2000 cycles). These properties are significantly superior to those of previously reported NFPF cathode materials. Furthermore, electrochemical impedance spectroscopy (EIS) revealed that the charge transfer resistance of NFPF/PVP (123.59 Ω) is much lower than that of pristine NFPF (500.23 Ω), indicating facilitated charge transfer and faster Na⁺ transport kinetics. The Na⁺ diffusion coefficient of NFPF/PVP (4.78 × 10⁻ 11 cm 2 s⁻ 1 ) is two orders of magnitude higher than that of NFPF (3.35 × 10⁻ 13 cm 2 s⁻ 1 ), further demonstrating that the PVP-derived nitrogen-doped carbon coating effectively improves the reaction kinetics of NFPF. This study provides new strategies and insights for developing cost-effective and high-performance NFPF-based materials.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Wu Yue,Yuchao Qi,Xue Ying,Hao Xiaonan,Sun Shulin,Zhao Jingxuan
The escalating industrial activities in metal processing, textile manufacturing, petroleum refining, leather production, and pulp industries have generated substantial amounts of industrial wastewater, presenting critical environmental challenges that require immediate attention. In this study, we developed a novel polyacrylonitrile grafted ionic liquid (PAN-g-IL) membrane through γ-ray irradiation-induced grafting of 1-vinyl-3-ethylimidazolium bromide onto polyacrylonitrile, followed by non-solvent induced phase separation (NIPS) membrane fabrication [1] . The developed membrane exhibited exceptional separation performance for both dye-laden and oil-contaminated wastewater systems. The PAN-g-IL membrane demonstrated a pure water flux of 358.1 L m −2 h −1 with remarkable rejection rates exceeding 98% for cationic dyes, and for oil–water emulsions has a very good retention performance [2] , indicating superior antifouling properties and long-term operational stability.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 11
·1-16
·
IF 2.4
Yao Liang,Wang Hao,Li Shuangde,Chen Yunfa
Sulfur dioxide (SO 2 ) emissions, a major source of air pollution, can be effectively mitigated through catalytic reduction to elemental sulfur using carbon monoxide (CO). In this study, Fe loaded TiO 2 catalysts were synthesized and subsequently subjected to pre-sulfurization treatment under varied conditions. Their catalytic performance was evaluated in SO 2 reduction for thermal and dielectric barrier discharge (DBD) plasma enhanced thermal catalysis. The results showed that OFS-Fe/TiO 2 catalyst with oxygen-free sulfurization (OFS) treatment exhibited the highest catalytic activity, achieving above 90% SO 2 conversion between 250 and 550 °C under oxygen-assisted reaction (OAR), along with long-term stability under 40–60% water vapor. However, the SO 2 conversion were below 20% for Fe/TiO 2 and oxygen-assisted sulfurization OAS-Fe/TiO 2 catalysts within 250 to 400 °C. Notably, the significantly enhanced catalytic performance of the OFS-Fe/TiO 2 catalyst was probably attributed to the high dispersion of Fe over nano-TiO 2 , the lower Fe 2+ /Fe 3+ ratio, and the formation of active FeS 2 species detected by SEM-EDS, XPS and TPD techniques. Furethermore, a conversion efficiency exceeding 90% was maintained throughout 80 to 550 °C under DBD plasma reaction over POFS-Fe/TiO 2 catalyst with room-temperature DBD plasma oxygen-free sulfurization treatment, surpassing thermal catalysis performance. The significantly enhanced low-temperature activity of plasma catalysis was attributed to the lowest Fe 2+ /Fe 3+ ratio, together with the transformation of FeS 2 into FeS, generating more sulfur vacancies. In-situ DRIFTS experiments confirmed two distinct SO 2 adsorption and reduction mechanisms between Fe/TiO 2 and OFS-Fe/TiO 2 catalysts. The results demonstrate that pre-sulfurization and plasma modification serve as an effective catalytic strategy to enhance CO-mediated SO 2 reduction, offering a sustainable emission control approach through sulfur resource utilization. Graphical
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Science China-Materials
·
2025
·
IF 7.4
Dong Chang,Liu Huan-Huan,Li Teng,Yang Li,Song Gui-Lin,Xu Hui-Kang,Lei Jun,Li Jie,Yan Ding-Xiang,Li Zhong-Ming
Polymer-based positive temperature coefficient (PTC) composites show exceptional potential for smart thermal management owing to temperature-responsive resistivity. However, conventional PTC composites with high Curie temperatures ( T c > 50 °C) are unsuitable for precision electronics requiring room-temperature operation. The development of low-Tc composites ( T c < 50 °C) faces challenges in balancing electrical resistivity, stability, and sensitivity. We present a ternary composite design where carbon black (CB) is selectively dispersed in myristyl alcohol (MA) phase, stabilized by an ethylene vinyl acetate (EVA) matrix. The reversible solid-liquid transition of MA dynamically modulates CB conductive networks, while the elasticity of EVA suppresses phase migration under elevated thermal conditions. The MA/EVA/CB composite achieves unprecedented performance: low T c (35 °C), ultralow initial resistivity (50 Ω cm), high PTC intensity (7.0), and exceptional cycling stability (>95% resistivity retention after 100 thermal cycles), surpassing previous benchmarks. Even after real space-environment exposure for 14 days, it retains ultralow resistivity and high PTC intensity. DSC/FTIR analyses confirm molecular integrity, validating stability under extreme conditions. Microstructural studies reveal that MA phase melting/crystallization governs conductive network disruption/reconfiguration. A self-regulating heater fabricated from this composite stabilizes an aluminum block at near T c (30.6 ± 0.03 °C) at 20 V and −10 °C environments without external controls. The low- T c PTC composites demonstrate transformative potential in adaptive thermal management for aerospace electronics.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 15
·1-15
·
IF 3
Lv Tingting,Wang Hong,Li Ding,Li Ruihai,Yang Chengliang,Zhao Wei,Cui Zhenyu,Li Jianxin
Organophosphorus pesticide contaminated sites have been categorized as a global priority contaminated site type for remediation due to the excessive accumulation of persistent organic pollutants. This study investigated the removal effect of phorate (PHR) in polluted soil through co-solvent-assisted alkaline activation of persulfate (PS) system, and evaluated the contribution of the co-solvent to the desorption behavior and solubilizing effect of PHR. Results showed that a high PHR degradation rate of 56.1% was obtained on the second day under the following conditions: 40% (v/v) acetonitrile (ACN) as co-solvent, C PS = 382 mmol L –1 , pH 12, and a W L /W s ratio of 1:2. It was a significant improvement over the system without co-solvent (19.9%). Moreover, a degradation rate of PHR was up to 93.9% on the 21st day under the optimized operating conditions, which was significantly higher than that observed in the persulfate oxidation system (13.1%) and the alkaline hydrolysis system (33.6%). The critical active species, including sulfate radicals \(S{O}_{4}^{\bullet -}\) and hydroxyl radicals (•OH) for the oxidation of PHR in contaminated soil during the alkaline-activated persulfate system were identified using electron spin resonance (ESR) and radical quenching experiments. The degradation pathways involved both hydrolytic pre-activation and radical mineralization. Furthermore, the luminescent bacteria tests demonstrated that the luminescence inhibition rate of the PHR-contaminated soil decreased from an initial value of 100% (highly toxic) to 16.2% (low toxicity) after remediation. In summary, this study offers a promising approach for the remediation of organophosphorus pesticide-contaminated soils.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-21
·
IF 12.6
Sui Meiju,Xie Kairu,Luo Yingying,Wang Haiqiang,Sheng Hao,Yue Sen,Liu Xiaoxun,Li Sha,Suk Jung Soo,Chen Shizhen,Chen Daiqin,Zhou Xin
Metastatic lung cancer remains a leading cause of cancer-related mortality worldwide, underscoring the urgent need for early detection and intervention strategies. Current diagnostic and therapeutic methods often fall short in sensitivity and efficacy, particularly for early-stage disease. In this study, we develop CaCO 3 @quercetin-Mn nanoparticles (CQM NPs) integrating dual-stage macrophage reprogramming with T 1 -weighted magnetic resonance imaging (MRI) enhancement for theranostic management of pulmonary metastasis. CQM NPs exploit dynamic macrophage polarization: initial M2 polarization promotes nanoparticles accumulation in metastatic lesions, enabling detection of lesions as small as 0.11 mm, while subsequent acid/glutathione (GSH)-triggered degradation reprograms tumor-associated macrophages to antitumor M1 phenotype, suppressing metastatic growth by 81.64% and preventing circulating tumor cells (CTCs) from colonizing the lungs by 78.08%. These findings demonstrate a significant improvement in MRI sensitivity and an integrated approach to therapy, contrasting with traditional methods that separate these challenges. This “detect-to-treat” paradigm bridges the critical gap between imaging sensitivity and immunomodulatory therapy, offering a blueprint for precision nanomedicine in metastatic cancers. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 6
·4467-4481
·
IF 2.599
Xia Jiawei,Zhang Lili,Fu Yongsheng,He Guangyu,Sun Xiaoqiang,Wang Xin
Catalytic hydrogenation of nitrophenols to aminophenols was considered as the most efficient way to solve their contamination together with huge economic benefit. NiCo 2 S 4 can be used not only as supercapacitor materials, but also competitive catalytic materials in hydrogenation reactions. In this work, a nitrogen-doped carbon black (NCB) supported NiCo 2 S 4 catalyst is successfully prepared by a facile one-pot solvothermal approach. TEM results show that the ultrafine NiCo 2 S 4 particles are uniformly dispersed on the surface of NCB at a low NiCo 2 S 4 loading, while aggregation may occur in NiCo 2 S 4 /NCB catalysts with an excessive NiCo 2 S 4 content. The NiCo 2 S 4 -30/NCB catalyst with a BET surface area of 47.20 m 2 g −1 exhibits the most excellent catalytic activity and durability for heterogeneous catalytic hydrogenation of nitrophenols using NaBH 4 as the reducing agent at 30 °C in the aqueous solution. The kinetic constant of hydrogenation of p -nitrophenol catalyzed by NiCo 2 S 4 -30/NCB is almost five times higher than the reaction catalyzed by pristine NiCo 2 S 4 . The outstanding performance of NiCo 2 S 4 -30/NCB is ascribed to the unique nanostructure of the catalyst and the combined effect between the NiCo 2 S 4 and NCB, including abundant surface functional groups of NCB for anchoring and dispersing NiCo 2 S 4 , strong adsorption ability for nitrophenol molecules facilitated by π–π stacking interaction, as well as fast electron transfer from NCB to NiCo 2 S 4 , resulting in higher local electron densities and thus facilitating the uptake of electrons by nitrophenols.
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Nature Protocols
·
2025
·
IF 16
Zeng Guang,Ma Sijie,Wan Tianqing,Chen Hongye,Chen Jiewei,Chai Yang
Bioinspired in-sensor computing devices can process information at sensory terminals by leveraging physical principles, thereby reducing latency and energy consumption during computation while simultaneously enhancing the efficiency of data processing and real-time analysis. Optoelectronic devices exhibit in-sensor computing functions, such as feature enhancement and data compression, by tuning the defect states of the semiconductor channels and thereby modulating the photoresponsivity and time constants of the sensors. These functionalities are critically dependent on precise fabrication and testing protocols. Here we present a detailed procedure for fabricating and characterizing in-sensor computing devices based on nanoscale semiconductor thin films. We explain how to test such optoelectronic devices, including the testing of visual adaptation and motion perception responses. When using semiconductor materials obtained from commercial suppliers, this procedure is time efficient and results in highly reproducible device performance. Nevertheless, all device fabrication and testing steps are generalizable and can be extended to other semiconductor thin films grown using different methods. The procedure is intended for researchers experienced in cleanroom operations and microfabrication techniques and can be completed in ~14 d. The use of bioinspired optoelectronic devices enables the development of a framework for advancing in-sensor computing technologies.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 12
·1-8
·
IF 5.479
Wang Xiao-hui,Yu Yin-xiao,Cheng Kun,Yang Wei,Liu Yuan-an,Peng Hong-shang
Conjugated polymer hybrid nanoparticles (NPs) loaded with both indocyanine green (ICG) and 1,3-diphenylisobenzofuran (DPBF) are described. The NPs are dually functional in that ICG acts as the photosensitizer, and DPBF as a probe for singlet oxygen ( 1 O 2 probe). The nanoparticle core consists of the energy donating host poly(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene) (PFP). The polymer is doped with the energy acceptor DPBF. Ratiometric fluorometric detection of singlet oxygen is accomplished by measurement of fluorescence at wavelengths of 415 and 458 nm. In addition, the shell of the positively charged polymeric nanoparticles was modified, via electrostatic interaction, with negatively charged PDT drugs ICG. The integrated nanoparticles of type ICG-DPBF-PFP display effective photodynamic performance under 808-nm laser irradiation. The 1 O 2 sensing behaviors of samples are evaluated based on the ratiometric fluorescent responses produced by DPBF and PFP. 1 O 2 can be fluorimetically sensed with a detection limit of 28 μM. The multifunctional nanoprobes exhibit effortless cellular uptake, superior photodynamic activity and a rapid ratiometric response to 1 O 2 .
Schematic of a dual-functional nanoplatform for photodynamic therapy (PDT) and singlet oxygen ( 1 O 2 ) feedback. It offers a new strategy for self-monitoring photodynamic ablation. FRET: fluorescence resonance energy transfer. Indocyanine green is attached in the shell of nanoparticles, and 1,3-diphenylisobenzofuran is doped into the energy donating host conjugated polymer.
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WATER AIR AND SOIL POLLUTION
·
2025
·Vol. 236
·期 4
·1-24
·
IF 3
Feng Qi,Zeng Guanli,Du Xiaopei,Yang Hang,Liu Zisen,Liu Yunli,Bai Guoliang,Xia Shibin,Wu Zhenbin,Feng Wei,Zhang Yi
The alkali fusion-magnesium modified oil-based drilling cuttings ash (AM-Mg-OBDCA) was synthesized and characterized for its capacity to remove Cd(II) from aqueous solutions. Adsorption kinetics conformed to the pseudo-second-order model, underscoring a chemisorption-dominated mechanism, while Langmuir isotherm analysis determined a maximum adsorption capacity of 440.2 mg/g. Post-adsorption structural and chemical transformations, confirmed by SEM, FT-IR, XRD, and XPS analyses, revealed the contributions of electrostatic attraction, ligand exchange, surface precipitation, and cation exchange. Photocatalytic tests demonstrated that the CdS-A/M-g-C 3 N 4 (2:1) composite exhibited superior degradation of oxytetracycline hydrochloride (OTC) under visible light, suggesting potential applications in environmental remediation. However, reusability tests indicated a marked decline in adsorption capacity after initial use, pointing to the need for further material optimization. Overall, AM-Mg-OBDCA shows promise as an effective adsorbent for Cd(II) removal and a precursor for photocatalytic materials, offering a sustainable approach to wastewater treatment and resource recovery.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 16
·1-19
·
IF 2.8
Li Minghua,Gu Xinyue,Chen Guohui,Chen Youmei,Zhu Qin,Yan Ya,Li Zhengui
In this study, CuInS 2 (CIS) was prepared using the liquid phase reflux method, and different amounts of activated carbon (AC) are loaded onto CIS via a wet grinding method to prepare AC/CIS composites with varying composite ratios. The crystal structure, surface elemental composition, oxidation states, morphology, specific surface area, and optical properties of CIS and AC/CIS were analyzed ussing techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) analysis, photoluminescence (PL), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis-DRS). Rhodamine B (RhB) was used as a model pollutant to investigate the visible-light photocatalytic activity of CIS and AC/CIS. The optimal mass load ratio for AC was determined to be 3%. At this optimal ratio, AC/CIS demonstrated the capability to degrade 80% of RhB within a span of 2 h. The judicious incorporation of AC enhances the visible light absorption of CIS, accelerates electron migration, which facilitates the separation of photogenerated carriers, thereby increasing the visible-light photocatalytic activity and recyclability stability of CIS. Additionally, due to the electrophilicity of AC, the introduction of AC led to a transformation in the main active species during the photocatalytic process, changing from holes (h + ) and hydroxyl radicals (·OH) to superoxide radicals (·O 2 − ). These findings strongly suggest that AC/CIS holds great promise as a visible photocatalyst for effectively degrading pollutants in the environment.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Qiu Yu,Sun Mingzi,Wu Jiandong,Chai Chunxiao,Wang Shengwei,Huang Hong,Zhao Xiao,Jiao Dongxu,Xu Shan,Wang Dewen,Ge Xin,Zhang Wei,Zheng Weitao,Song Yujiang,Fan Jinchang,Huang Bolong,Cui Xiaoqiang
The efficiency of the oxygen reduction reaction (ORR) is limited by the scaling relationship in the conventional oxygen associative pathway. To break such limitations, we present an approach to effectively activate the oxygen dissociative pathway through co-confining single p -block (In, Sn, Pb) atoms and interstitial H atoms within Pd metallenes, leading to good ORR performance. PdPbH x metallenes exhibit a high mass activity of 1.36 A mg −1 at 0.95 V (vs. RHE), which is 46.9 times higher than that of the benchmark Pt/C. The minimal performance decay after 50,000 potential cycles confirms a good stability. In situ vibrational spectroscopy investigations and theoretical calculations highlight that interstitial H atoms facilitate the direct dissociation of O 2 while single Pb atoms enhance O 2 adsorption strength. The electroactive PdPbH x metallenes is attributed to the up-shifted Pd-4 d orbitals induced by H and Pb atoms. This research supplies critical inspiration for developing highly efficient ORR electrocatalysts.
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