ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Wen Jiang Zheng,Ning An,Jian Hai Yang,Jinxiong Zhou,Yong Mei Chen
Tough Al-alginate/poly(N-isopropylacrylamide) (PNIPAM) hydrogel has been synthesized by introducing an interpenetrating network with hybrid physically cross-linked alginate and chemically cross-linked PNIPAM. Varying the concentration of AlCl3 regulates the mechanical properties of the tough hydrogel and tunes its lower critical solution temperature (LCST) as well. The tough Al-alginate/PNIPAM exhibits 6.3 ± 0.3 MPa of compressive stress and 9.95 of uniaxial stretch. Tunability of LCST is also achieved in a wide range within 22.5–32 °C. A bending beam actuator and a four-arm gripper made of bilayer (Na-alginate/PNIPAM)/(Al-alginate/PNIPAM) hydrogel as prototype of all-hydrogel soft robotics are demonstrated. A finite element (FE) simulation model is developed to simulate the deformation of the soft robotics. The FE simulation not only reproduces the deformation process of performed experiments but also predicts more complicated devices that can be explored in the future. This work broadens the application of temperature-responsive PNIPAM-based hydrogels.
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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 3
·309-314
·
IF 1.87
Chen Le,Wang Yue-Wei,He Ming-Yang,Chen Qun,Zhang Zhi-Hui
5A zeolites were facilely synthesized from attapulgite clay and sodium aluminate precursors. The optimum synthesis condition for 4A zeolite (Na-form) were H 2 O/attapulgite ratio of 40:1 volume/mass, NaOH/attapulgite mass ratio of 2.35:1, the crystallization time was 4 h at 80–85 °C. The 4A zeolite was converted to related 5A zeolite (Ca-form) through ionic exchanges using calcium chloride solution with the Si/Al mole ratio of 1.3. SEM images demonstrated that as-synthesized 5A zeolites are ordered cubic crystals, average crystals length dimension is 1–2 μm. And the zeolites product had a specific surface area of 482 m 2 g −1 and total pore volume of 0.274 cm 3 g −1 . The static adsorption experiments showed that the equilibrium adsorption capacities of n -decane and n -pentadecane on produced 5A zeolite were 0.253 and 0.510 g g −1 , respectively. And the adsorption equilibrium time of n -decane and n -pentadecane on 5A zeolite were 45 and 60 min, respectively. The experimental adsorption data of n -decane and n -pentadecane on three zeolites could be properly fitted by the Langmuir–Freundlich isotherm model.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 38
·20386-20395
·
IF 14.511
Qian Deng,Yan Zhong,Canyang Zhao,Fujie Zhang,Cheng-Liang Xia,Yue Chen,Ran Ang
Chemical doping is an indispensable means of improving the performance of thermoelectric materials, while one bottleneck for maximizing optimization is the low solubility of dopants. Here, we report a striking new insight that the more electronegative Br doping not only synergistically optimizes the carrier concentration and enhances the electron mobility, but also promotes the solubility limit of Gd in the n-type PbSe matrix, which is beneficial for Gd to flatten the conduction band. This is a successful strategy to improve the Seebeck coefficient to maximize the power factor. Concurrently, the anomalous strain field induced by atomic disorder and dislocation in the n-type Pb1−yGdyBr0.003Se0.997 system strongly scatters multi-frequency phonons, which reduces the lattice thermal conductivity markedly. As a result, a superior figure of merit (zT) value of ∼1.4 at 873 K and ultra-high power factor in a wide-temperature range are achieved for n-type Pb0.997Gd0.003Br0.003Se0.997. This work provides a unique paradigm to improve thermoelectrics by increasing the solid solubility of dopants.
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NANO
·
2016
·
IF 0.951
Zezhong Xu,Jingyu Si
H 2 O 2 detection plays an important role in electrochemical sensing since H 2 O 2 often acts as an intermediate product or regulator in various reactions. Nanoporous carbon (NPC) can be a potential candidate in electrochemical sensing because of its high specific surface area, various pore sizes and structures. In this work, we reported the preparation of N-doped NPC derived from the highly available, accessible and recyclable plant Typha orientalis . The products have high surface area (highest surface areas of 1439.0 m 2 g − 1 ) and a number of nanopores. Highest content of nitrogen atom in the product is 3.66 at.%). Typical product exhibits high electrocatalytic activity for reduction of hydrogen peroxide. The product may have further use for glucose biosensing. We developed a low-cost, simple and readily scalable approach to prepare the excellent carbon electrocatalyst directly from crude biomass. In addition, because of high surface area and doping of nitrogen element, the product may find broad applications in the fields of supercapacitors, lithium-ion batteries, gas uptake and so on.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2015
·
IF 1.648
Yu Jiang,Yanye Wu,Yinlei Huo
Series of thermo-sensitive hydrogels (PNAs) based on N-isopropylacrylamide/acrylamide interpenetrating polymer networks were synthesized via in situ free-radical polymerization. Poly (ethylene glycol diacrylate) and poly (ε-caprolactone diacrylate) were synthesized as macro-cross-linkers due to their excellent biocompatibilities. The macro-cross-linkers and hydrogels were characterized by 1H NMR and FT-IR, respectively. The interior morphology of the hydrogels was observed by scanning electron microscopy. The swelling ratios at different temperatures and the swelling/deswelling kinetics of the hydrogels were studied. Their volume phase transition temperatures were also measured by differential scanning calorimetry characterization. The results indicated that the PNA hydrogels had uniform macroporous structures, and they not only had considerable swelling ratios, but also exhibited rapid swelling/deswelling kinetics and response sensitivities. In addition, the weight ratio of AAm/NIPAAm also affected the swelling performance and phase transition temperature of hydrogels, and its value less than 5% was the optimal proportion to achieve excellent comprehensive properties. Levofloxacin lactate and Naproxen were selected as drugs and simulated in vitro condition release, and the drug release results showed that the PNA hydrogels behaved fast release performance.
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PubMed
高影响因子
SENSORS
·
2025
·Vol. 25
·期 8
·2508
·
IF 3.5
Hanxue Yang,Chao Rong,Shundong Ge,Tao Wang,Bowei Zhang,Fu-Zhen Xuan
HighlightsWhat are the main findings?3D crumpled MXene with strain wrinkles enhances conductivity and prevents restacking.Cu nanoclusters (3.0 wt%) synergize N-doping for noble metal-like catalytic activity.What is the implication of the main finding?Ultrasensitive dual-analyte non-enzymatic detection of DA/UA with anti-interference capability and rapid response.Novel material design strategies provide new approaches for the development of future high-performance sensors.Simultaneous detection of dopamine (DA) and uric acid (UA) is essential for diagnosing neurological and metabolic diseases but hindered by overlapping electrochemical signals. We present an ultrasensitive electrochemical sensor using copper nanoclusters anchored on nitrogen-doped crumpled Ti3C2TxMXene (Cu-N/Ti3C2Tx). The engineered 3D crumpled architecture prevents MXene restacking, exposes active sites, and enhances ion transport, while Cu nanoclusters boost electrocatalytic activity via accelerated electron transfer. Structural analyses confirm uniform Cu dispersion (3.0 wt%), Ti-N bonding, and strain-induced wrinkles, synergistically improving conductivity. The sensor achieves exceptional sensitivity (1958.3 and 1152.7 μA·mM−1·cm−2for DA/UA), ultralow detection limits (0.058 and 0.099 μM for DA/UA), rapid response (<1.5 s), and interference resistance (e.g., ascorbic acid). Differential pulse voltammetry enables independent linear detection ranges (DA: 2–60 μM; UA: 5–100 μM) in biofluids, with 94.4% stability retention over 7 days. The designed sensor exhibits excellent capabilities for DA and UA detection. This work provides a novel design strategy for developing high-performance electrochemical sensors.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tao Chen,Shujin Li,Ke Chen,Mazhar Hussain Danish,Hui Liu,Di Li,Hongxing Xin,Yongsheng Zhang,Jian Zhang,Xiaoying Qin
Bi2Te3-based thermoelectric (TE) materials are the state-of-the-art compounds for commercial applications near room temperature. Nevertheless, the application of the n-type Bi2Te2.7Se0.3 (BTS) is restricted by the comparatively low figure of merit (ZT) and intrinsic embrittlement. Here, we show that through dispersion of amorphous Si3N4 (a-Si3N4) nanoparticles both 14% increase in power factor (at 300 K) and 48% decrease in lattice thermal conductivity are simultaneously realized. The increased power factor comes from enhanced thermopower and reduced electrical resistivity while the reduced lattice thermal conductivity originates mainly from scattering of middle- and low-frequency phonons at the incorporated a-Si3N4 nanoparticles. As a result, a large ZTmax = 1.19 (at 373 K) and an average ZTave ∼ 1.12 (300–473 K) with better mechanical properties are achieved for the BTS/0.25 wt % Si3N4 sample. Present results demonstrate that the incorporation of a-Si3N4 is a promising way to improve TE performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Weiyao Geng,Feng Wei,Shichao Wang,Jun Qiao,Yaohui Lv
The insertion of ion additives into electrolyte can effectively improve the electrochemical properties of energy storage devices by redox reaction. Besides, the doping of heteroatoms increase the defect sites at the edge of carbon materials (CMs), induce the reaction of Zn 2+ with functional groups, thereby enhancing the capacity of carbon materials. Herein, the N doped carbon nanosheets with excellent surface area of 1318.2 m 2 g −1 are prepared using glycine as nitrogen sources. The synergistic effect of the introduction of nitrogen into CMs and the addition of redox ion additives into electrolyte enhances the storage performance of zinc ions, resulting in intriguing specific capacity of 211.8 mAh g −1 , superior energy output of 177.5 Wh kg −1 and outstanding cycle life with capacity decay of 0.000075 % per cycle in 1 M Zn(CF 3 SO 3 ) 2 /0.1 M ZnI 2 electrolyte. This work supplies a feasible method to enhance the zinc ion storage properties by doping of heteroatoms into CMs and introducing of ion additives into electrolyte.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Shuai Yang,Tao Li,Jun Fang,Shichong Yao,Zhenyu Li,Yunyun Liu,Jie Chen,Yuanliang Yuan,Xiaocong Zhong
N,O-codoped microporous carbon (HPC) was derived from hypnum plumaeforme via precarbonization and KOH activation and utilized as an electrode for supercapacitors. The HPC750 sample, produced at an activation temperature of 750 °C, demonstrated superior capacitive behavior due to its large specific surface area, microporous architecture, and high number of oxygen and nitrogen heteroatoms. These HPC750 electrodes have a specific capacitance of up to 424 F g −1 at a current density of 1 A g −1 while also providing excellent rate performance, maintaining >85 % capacitance over a range of 1 to 100 A g −1 . In a symmetric supercapacitor configuration using 6 M KOH and 1 M Na 2 SO 4 as electrolytes, the HPC750 electrodes exhibit high specific capacitances of 96.2 F g −1 and 65.8 F g −1 at a current density of 1 A g −1 , respectively. With the Na 2 SO 4 electrolyte, the device achieved a peak energy density of 29.9 W h kg −1 and a peak power density of 225 W kg −1 . In addition, the electrodes retained approximately 90 % of their initial capacitance after 15,000 cycles at a current density of 5 A g −1 .
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Yue Guo,Chengyan Liu,Geng Cheng,Huimin Zhou,Ke Zhang,Guodong Yang,Yan Li,Jianhua Zhou,Lei Miao,Dong Hu
Lithium−oxygen batteries (LOBs) are considered promising candidates for next-generation energy storage systems due to their ultrahigh theoretical energy density. However, their practical application is challenged by sluggish reaction kinetics and unstable discharge product formation. Herein, we report the rational nanoscale engineering of a Bi2Se3/Bi2O3 heterostructured cathode via a controlled hydrothermal synthesis, addressing these limitations. The type-I band alignment in nanocomposite Bi2Se3/Bi2O3 generates a built-in electric field at the heterointerface, facilitating electron and ion transport and lowering the energy barriers for oxygen reduction (ORR) and evolution (OER) processes. Consequently, the Bi2Se3/Bi2O3 heterointerface catalyst exhibits exceptional specific capacity (19433.6 mAh g−1) and cycle stability (201 cycles at 200 mA g−1; 98 cycles at 1000 mA g−1), surpassing pristine Bi2Se3 by 320% in cycle life. This study establishes heterointerface engineering as a universal strategy for developing high-performance LOB catalysts.
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Polymers
·
2025
·Vol. 17
·期 9
·1198
·
IF 4.9
Baoning Zhu,Jinghua Liu,Qijun Zhong,Yaru Wen,Qianqian Dong,Yuhao Li,Qianqian Jin,Yao Lu
Heteroatom-doped biomass-derived porous carbon materials show promising applications as electrode components in energy storage technologies. In this investigation, we present a template-assisted pyrolysis procedure to fabricate nitrogen–oxygen dual-doped carbon materials. Firstly, the precursor and template initially polymerized to form a white jelly-like gel, which was freeze-dried to create a nanosheet-assembled structure. Subsequent high-temperature pyrolysis induced the formation of a porous structure with nanosheet morphology. The CMC-ZnK sample derived from the dual template of potassium citrate and zinc acetate pyrolyzed at 800 °C exhibits optimal electrochemical performance, delivering a specific capacitance of 271.4 F g−1at 1 A g−1in a three-electrode configuration, along with outstanding rate capability (90% retention, 244 F g−1at 10 A g−1). The constructed supercapacitor demonstrated an energy density of 6.5 Wh kg−1under a power density of 500 W kg−1. Furthermore, this study systematically investigated the performance variation mechanisms at different temperatures, revealing the relationship between structural composition and temperature in biomass materials.
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INTERNATIONAL JOURNAL OF TOXICOLOGY
·
2023
·
IF 2.2
Xu Fang,Wei Zhu,Huiying Zhao,Wencheng Yin,Xiao Song,Fengxin Liu
Lacto-N-triose II (LNT II), an essential human milk oligosaccharide and precursor to lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT), was evaluated for safety. Genotoxicity was assessed through in vitro tests including Bacterial Reverse Mutation Test and mammalian cell micronucleus test, and a subchronic oral gavage toxicity study was conducted on juvenile Sprague-Dawley rats. In this study, LNT II was administered at dose levels of 0, 1,500, 2,500, or 5,000 mg/kg body weight (bw)/day for 90 days, followed by a 4-week treatment-free recovery period. LNT II was non-genotoxic in the in vitro assays. No compound-related effects were observed across all dosage levels based on various measures, including clinical observations, body weight gain, feed consumption, clinical pathology, organ weights, and histopathology. Consequently, the highest dosage of 5,000 mg/kg bw/day was established as the no-observed-adverse-effect-level (NOAEL). These results suggest the safe use of LNT II in young children formula and as a food ingredient, within the limits found naturally in human breast milk.
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