MICROCHEMICAL JOURNAL
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2026
·
IF 5.2
Muhammad Javed Liaqat,Shahid Hussain,Jahirul Islam,Mohammed Mujahid Alam,Rajesh Kumar Manavalan,Xiangzhao Zhang,Junlin Liu,Guanjun Qiao,Guiwu Liu
Preparation of Co 3 O 4 -SnO 2 heterostructures via hydrothermal method. • Peculiar morphology with abundant active sites and wide surface area. • Enhanced gas response (R g /R a ) of 92.8 with excellent sensitivity. • Excellent response is attributed to rapid charge transfer across p-n heterojunction. The recent development of p-n heterojunction sensors has attracted significant interest in gas sensing applications due to their excellent charge transfer, more active sites, and lower operating temperatures. In this research, Co 3 O 4 -SnO 2 heterostructured composite has been developed and investigated as a highly selective sensor for nitrogen dioxide (NO 2 ). The gas sensing results demonstrated a remarkable response of 92.8 to 100 ppm NO 2 at the optimal operating temperature of 200 °C. The sensor was tested over a wide temperature range (50–300 °C), demonstrating exceptional performance, remarkable repeatability, and consistent baseline recovery. The Co 3 O 4 -SnO 2 heterostructure has excellent long-term stability and consistently reliable detection across varying humidity conditions. The sensor's enhanced sensitivity to NO 2 was validated with selectivity tests for other interfering gases. An improved method revealing the NO 2 sensing approach is proposed, supported by density functional theory calculations to investigate the diffusion efficiency of investigated gases at Co 3 O 4 -SnO 2 heterostructures. The results indicated that Co 3 O 4 -SnO 2 heterostructures are an excellent option for practical NO 2 detection under different environmental conditions. Download: Download high-res image (400KB) Download: Download full-size image
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CELLULOSE
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2026
·
IF 4.6
Shi Qiu,Li Gang,Qin Hongmei,Shi Zhuqun,Xiong Chuanxi,Yang Quanling
Traditional cellulose films lack both effective UV-shielding and durable flame-retardant properties, limiting their use in transparent packaging and protective. In this study, a highly transparent, UV-shielding, and flame-retardant cellulose composite film was fabricated via a solvent-exchange route. Water-insoluble triphenyl phosphate (TPP) flame retardant was diffused through ethanol into regenerated cellulose (RC) gel prepared by NaOH/urea/H 2 O low temperature dissolving system, followed by post-treatment with 3-aminopropyltriethoxysilane (KH550) ethanol solution to improve the compatibility between TPP and RC and drying. The obtained PNSi-RC films exhibit visible-light transmittance exceeding 85% and demonstrate improvement in UV shielding capability. Moreover, the PNSi 7 -RC film achieved a limiting oxygen index (LOI) of 29 and a UL-94 V-0 rating, exhibiting good flame-retardant property. The films remained largely consistent flame-retardant performance after water exposure for 24 h, and the LOI values were almost no changes. This simple strategy can be scalable to the preparation process of other films for green flame-retardant packaging and protective.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 4
·336
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IF 3
Du Xinli,Yu Jian,Ke Shaoqiu,Wei Mingxu,Dong Xiurong,Nie Xiaolei,Zhu Wanting,Wei Ping,Zhang Yu,He Danqi,Liu Mingrui,Hua Lin,Hu Zhili,Zhao Wenyu,Zhang Qingjie
Thermoelectric (TE) materials enable direct thermal-electric energy conversion, but Bi 2 Te 3 -based alloys suffer from limited thermoelectric performance and controversial doping mechanisms of Cu, hindering their practical application in waste heat recovery. To address these issues, this work designs and synthesizes a series of zone-melted p-type Bi 0.5 Sb 1.5*(1− x ) Cu 1.5* x Te 3 +3 wt % Te ( x = 0.0–2.0%) samples. The results show that Cu occupies interstitial sites, suppresses Te volatilization to increase the hole concentration, and enhances the electrical conductivity. Concurrently, lattice distortions and secondary phases reduced lattice thermal conductivity. The 1.0% Cu-doped sample achieves a maximum power factor of 4.74 mW·m − 1 ·K − 2 at 300 K, a peak zT of 1.03 at 412 K, and an average zT of 0.91 (300–500 K), representing improvements of 7%, 8.4%, and 18% over the undoped matrix. Subsequent hot deformation further reduced lattice thermal conductivity but did not enhance zT due to an anomalous rise in carrier concentration and decreased mobility. This study clarifies the interstitial Cu doping mechanism, providing a viable strategy for optimizing Bi 2 Te 3 -based materials.
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JOURNAL OF MEMBRANE SCIENCE
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2026
·
IF 8.8
Wenyuan Qiu,Xiaoke Wei,Tao Wang,Hao-yan Yin,Haibing Wei
Anion exchange membranes (AEMs) are central to clean-energy electrochemical technologies, yet achieving high hydroxide conductivity together with dimensional and alkaline stability remains challenging. Here we implement a straightforward branching strategy in poly(arylene 3-piperidinium)s by incorporating two trifunctional units, i.e., triptycene and 1,3,5-triphenylbenzene, into the polymer backbone. This architecture suppresses water uptake and swelling without compromising the membrane's ion-transport efficiency and chemical durability. Compared to linear membranes, the branched membranes exhibit a 34−36% reduction in water absorption. Triptycene-based branched AEMs achieved superior performance, including suppressed swelling (<18% at 80 °C), high conductivity up to 191 mS cm −1 at 80 °C, and improved alkaline stability, remaining intact in 1 M NaOH for at least 2000 h. Importantly, a water electrolyzer based on B-PT3Pip-3%Trip demonstrated a current density of 6.9 A cm −2 at 2.0 V and 80 °C, and can operate stably under 1 A cm −2 at 60 °C for 1000 h with a voltage decay of only 81 μV h −1 . The synthetic simplicity of the branching strategy, together with the combination of suppressed swelling, high conductivity, and long-term durability, makes branched poly(arylene 3-piperidinium) AEMs highly promising for AEM water electrolysis applications.
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产品关联
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Drug Delivery and Translational Research
·
2026
·
IF 6.9
Feng Chengmin,Liu Yuting,Zhang Chenghua,Niu Lijing,Dong Jun,Wang Bing
Fibroblast-to-myofibroblast transition (FMT) and resistance to apoptosis are central drivers of fibrosis. Here, we report that sustained release of Calcium Sensing Receptor (CaSR) positive allosteric modulators (L-Phe, L-Trp, and cinacalcet) from electrospun p-dioxanone copolymer membranes exerts potent, ligand-specific anti-fibrotic effects. All formulations activated Gq-coupled CaSR, evoking ER-Ca 2 ⁺ release and IP₃ generation. Differential recruitment of Gi yielded distinct cAMP/ROS signatures: cinacalcet (strong Gi bias) lowered cAMP and ROS levels, and suppressed AP-1, collagen-I and α-SMA expression; L-Trp (intermediate Gi) left cAMP unchanged while elevating ROS and inflammatory markers but nonetheless inhibited proliferation; L-Phe (weak Gi) raised cAMP, reduced ROS and fibrotic markers. Molecular docking confirmed Gi-coupling potency: cinacalcet (-125.4 kJ mol⁻ 1 ) > L-Trp (-101.7 kJ mol⁻ 1 ) > L-Phe (-75.5 kJ mol⁻ 1 ). In a rat intestinal-adhesion model, cinacalcet and L-Phe membranes prevented adhesions and collagen deposition, whereas L-Trp only inhibited proliferation. Thus, these findings indicate that CaSR ligands tune fibroblast fate via Gi-biased receptor conformations and that ligand electrospun membranes constitute a versatile materials platform for precision antifibrotic therapy. Graphical
The alternative text for this image may have been generated using AI.
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PubMed
高影响因子
Journal of Photonics for Energy
·
2026
·
IF 2.5
Pengyu Fei,Yun Li,LingLing Jiao,Fan Cao,Zhouze Chen,Hongbin He,Ruoxuan Peng,XingYu Zhan,Jiancheng Zhou,Yitao Si,Naixu Li
Photothermal-assisted photocatalysis, which couples localized thermal energy with photogenerated charge carriers to overcome thermodynamic and kinetic limitations, has emerged as an effective strategy for solar-driven CO2 reduction. Herein, nanoflower-like NiO/ZnO p–n heterojunction spheres were rationally constructed via a simple hydrothermal calcination method to achieve efficient concentrated photothermal-assisted CO2 reduction. The unique nanoflower morphology provides abundant interfacial contact between NiO and ZnO, while the formation of the p–n heterojunction establishes an internal electric field that suppresses electron-hole recombination. Under concentrated irradiation (4.31 W·cm−2), the photothermal coupling effect reduces the apparent activation energy and enables the NiO/ZnO photocatalyst to deliver CO and CH4 production rates of 51.78 and 15.96 μmol·g−1·h−1, which are 7.92 and 9.61 times higher, respectively, than those obtained under nonconcentrated illumination. Photoelectrochemical measurements and in situ DRIFTS further reveal that the built-in electric field facilitates directional charge transfer from ZnO to NiO, thereby promoting CO2 adsorption and activation. We demonstrate an efficient photothermal-coupling strategy to construct high-performance catalysts for artificial photosynthesis and solar-to-fuel conversion.
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
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2023
·
IF 4.6
Yian Hu,Shunyao Huang,Yujia Gao,Jaeyeon Lee,Zhangsiyuan Jin,Geon-Hyoung An,Yuljae Cho
Wearable or patchable biosensors have attracted tremendous attention due to their continuous health-monitoring capabilities. In particular, self-powered passive biosensors based on a piezoelectric nanogenerator (PENG) have demonstrated measurements of physiological signals from which cardiovascular information can be analyzed such as heart rate and blood pressure. However, challenges still remain with regard to both material and device aspects. For the effective and accurate measurement of extremely weak physiological signals, various methods have been introduced, including employment of inorganic lead-based piezoelectric materials and design of a complex material or device structure. In spite of their effectiveness in enhancing the piezoelectric output response, the introduced methods brought concomitant issues, such as toxicity and complexity. We present unique methods to produce a transparent standalone piezoelectric polymer film which can be directly transferred to any surface such as the human skin. Through a room temperature solvent vapor annealing process, we further enhance the crystallinity and a portion of the ferroelectric β-phase of the transparent standalone polymer film, resulting in an improved piezoelectric output response. Based on these two new methods introduced, we demonstrate a simple sandwich-structured, transparent, and patchable biosensor based on PENG for radial artery detection with significantly reduced complex manufacturing processes, providing great practical value.
研究领域:
生物医学工程
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材料科学
·
纳米技术
·
可穿戴技术
·
健康监测
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Frontiers in Chemistry
·
2020
·
IF 3.693
Xu Yubing,Wang Xin,Pan Yuzhu,Li Yuwei,Emeka Elemike Elias,Li Qing,Zhang Xiaobing,Chen Jing,Zhao Zhiwei,Lei Wei
Organic-inorganic hybrid perovskite single crystals (PSCs) have been emerged as remarkable materials for some optoelectronic applications such as solid-state photodetectors, solar cells and light emitting diodes due to their excellent optoelectronic properties. To decrease the dark current, function layers based on spin-coating method are frequently requested for intrinsic PSCs to block the injected current by forming energy barrier. However, the amorphous function layers suffer from small carrier mobility and high traps density, which limit the speed of the photoelectric response of perovskite devices. This work supposes to grow thick MAPbBr3 and MAPbI3 mono-crystalline thin films on the surface of intrinsic MAPbBr2.5Cl0.5 PSCs substrate by a heteroepitaxial growth technique to act as electron-blocking layers. Meanwhile, C60 and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) layers are deposited on the opposite surface of substrate PSCs by spin-coating method to block injected holes. This Au-MAPbI3-MAPbBr3-MAPbBr2.5Cl0.5PSCs-C60-PCBM-Ag heterostructure can be used as excellent X-ray photodetector (XPD) due to its low dark current density of 6.97 × 10−11 A cm−2 at −0.5 V bias, high responsivity of 870 mA/W at −100 V bias and X-ray sensitivity as high as 59.7 μC mGy−1 cm−2 at −50 V bias.
研究领域:
材料科学
·
光电子学
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Hongchen Liu,Fan Yang,Zhusong Xu,Xingru Yan,Fengjiang Chen,Chong Xu,Sai Che,Yongfeng Li
The exploration of bifunctional transition metal-based catalysts for water electrolysis is important for clean and large-scale production of hydrogen but yet remains challenging. Herein, a novel phosphorous doped cobalt-copper aerogel (P-CoCu) with three-dimensional interconnected structure was prepared via spontaneous gelation and in-situ P doping process. The electronic structure and charge density of Co could be modulated upon alloying with Cu, resulting in optimized charge transfer efficiency and proton adsorption energy. The hydrophilicity and the bond strength of H* were further optimized through P doping, which promoted the reaction efficiency on the surface of P-CoCu. Besides, the unique porous morphology of aerogel endowed the catalyst with efficient mass transfer pathways and abundant active sites. Density functional theory (DFT) calculations further revealed the electron redistribution and the optimization of H 2 desorption performance through Cu alloying and P doping. Based on the outstanding features, the optimized P-CoCu sample achieved extremely low overpotentials of 74/224 mV for hydrogen evolution reaction (HER) / oxygen evolution reaction (OER) at a current density of 10 mA·cm −2 in 1 M KOH electrolyte. Additionally, a two-electrode electrolytic cell assembled with P-CoCu only required an operating voltage of 1.57 V at 10 mA·cm −2 with decent stability, which was comparable to commercial noble-metal catalysts (Pt/C//RuO 2 /C) and superior to recently published electrocatalyst. This work provides an anticipated perspective of non-noble metal-based bifunctional catalysts for overall water splitting.
研究领域:
材料科学
·
催化化学
·
能源转换
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Sen Liao,Fawei Zhu,Xinyi Zhao,Hua Yang,Xiaoqing Chen
In this work, phosphorus, nitrogen co-doped carbon quantum dots (P,N-CQDs) as highly selective fluorescent probe for cobalt ion (Co 2+ ) detection were designed and synthesized via a one-step hydrothermal protocol by employing pyridoxal 5-phosphate and ethanediamine. This probe enables selective detection of Co 2+ with a linear range of 0–60 μM and a limit of detection of 0.053 μM through variation in fluorescence with respect to target concentration and electron-transfer from P,N-CQDs to Co 2+ . Furthermore, ethylenediaminetetraacetic acid-modified Fe 3 O 4 @SiO 2 (Fe 3 O 4 @SiO 2 -EDTA) was tailor-designed and prepared to successfully realize the recovery of P,N-CQDs/Co 2+ fluorescence for the first time. The reusable P,N-CQDs as fluorescent sensors for Co 2+ also show good linearity and sensitivity. Ultimately, this fluorescent probe was applied in the analysis of real river water samples.
研究领域:
分析化学
·
环境科学
·
材料科学
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BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Huali Zeng,Baojie Liu,Jiao Li,Mei Li,Meijiao Peng,Chengrong Qin,Chen Liang,Caoxing Huang,Xinping Li,Shuangquan Yao
Lignin separation is an important procedure that benefits multiple industries and in particular biomass transformation efforts. In this study, bagasse lignin was separated by freeze–thaw-assisted p -toluenesulfonic acid ( p -TsOH) pretreatment . The optimal conditions were freezing temperature −60 °C, freezing time 8.0 h, thawing temperature 15 °C, p -TsOH concentration 60%, pretreatment temperature 70 °C, and time 20 min. Lower acid concentrations and temperatures were used compared with traditional p -TsOH pretreatment. The efficiency and selectivity of lignin separation were improved. It was attributed to freeze-thawing, which provided a more efficient physical channel for the effective penetration of p -TsOH. The separation, extraction and purity of lignin were improved to 89.76%, 78.22% and 77.89%, respectively. High separation, high extraction, high purity and large molecular weight lignin samples were obtained. In addition, the recovery and reuse of p -TsOH was enhanced. This provided a new method for the efficient and clean separation of lignin.
研究领域:
生物化学
·
生物质能
·
环境科学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Hemiao Wang,Yurui Wang,Xin Li,Xiaolian Liu,Xin Zheng,Yueqin Shi,Minxuan Xu,Jian Zhang,Qi Zhang
The insertion of a graphene interlayer between van der Waals (vdW) materials could suppress the interlayer recombination to improve interface quality and facilitate charge transport. However, its effect on photovoltaic-mode detectors has rarely been explored. Here, self-powered photodetectors based on WSe 2 /graphene/SnS 2 vdW heterojunctions were assembled and the impact of adding graphene interlayer on its performance was investigated. The p-g-n heterostructure exhibits a photovoltaic characteristic, V OC = 0.13 V and I SC = 0.12 nA under illumination of 2.98 mW/cm 2 @405 nm, lower than that of a control (WSe 2 /SnS 2 ) counterpart ( V OC = 0.19 V and I SC = 1.15 nA). Yet an FF value up to 48.16 % was obtained under an irradiation power density of 0.332 mW/cm 2 @405 nm, which is visibly higher than that of bare WSe 2 /SnS 2 vdW heterostructure . The insertion of graphene interlayer is deemed to reduce the charge traps between vdW materials that are caused by the large concentration difference of majority carriers. However, in case of vdW heterostructure, the subsequently increased leakage current makes the junction less ideal. Thereby interface engineering methods should be used with caution to tune vdW heterostructures on the nanoscale .
研究领域:
材料科学
·
光电子学
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