Journal of Materials Chemistry C
·
2025
·
IF 5.1
Rongli Zhang,Guoya Wei,Chunhui Luo
Conductive hydrogels (CHs) were widely applied in actuating, sensing, health monitoring, etc. However, their applications in aquatic environments faced challenges, due to the excessive swelling and poor underwater adhesion. To address this issue, it was necessary to combine anti-swelling, adhesion, and long-term usability into one strain sensor. Hence, bilayer-structured CHs with stable sensing properties both in water and on land were developed via radical copolymerization of 2-hydroxyethyl methacrylate (HEMA) and L-serinyl acrylate-copper complex (LSA) to form an anti-swelling yet conductive matrix, followed by painting the adhesive layer of gelatin-tannin acid at the bottom. Because of the Cu2+ ions, it achieved ion conductivity, while the strong interaction between Cu2+ and carboxylic acid (-COOH)/amine (-NH2) groups stabilized Cu2+ ions and retarded leakage of conductive components. Due to the delicate balance of hydrophilic hydroxyl groups and hydrophobic backbones, the hydrogel displayed excellent swelling-resistance (with a swelling ratio of approximately 20%, tensile stress of 215 kPa, tensile strain of 180%, and conductivity of 17.9 mS/m) even after immersing in water for a month. Meanwhile, the hydrogel maintained robust adhesion (15 kPa) in aquatic environments for a month. Strain sensors based on the bilayered hydrogel exhibited linear sensitivity in monitoring human motions both on land and underwater, and enabled information transmission through the Morse code. Consequently, this strain sensor holds significant potential in underwater wearable devices.
研究领域:
材料科学
·
生物医学工程
·
柔性电子器件
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuxiang Li,Kaili Zhang
Aluminum powder is widely used as a high-energy fuel in the domain of energetic materials, while the oxidation kinetics of Al is limited by the oxide shell on the particle surface which acts as a reaction barrier. Recently, transition metal fluorides have emerged as an intriguing type of fluorine-containing oxidizers which can improve reactivity of Al through interfacial fluorination. However, most previous research focused on micron-sized fluorides, while the reactivity of nanosized fluoride in energetic composite was rarely studied. In this work, nanosized NiF 2 (∼100 nm) was synthesized through a facile and safe approach, and it was coupled with nanosized and micron-sized Al powders to form energetic composites. Regardless of dimension of Al, Al/NiF 2 composite exhibited higher specific heat release, higher reaction efficiency, and lower reaction temperature than that of corresponding Al/NiO composite. Post-characterizations suggested that elemental Ni and AlF 3 were produced from the reaction of Al/NiF 2 composite at 710 °C, and AlF 3 was found to evaporate over 900 − 1050 °C. The long-term stability of energetic composites was evaluated through a real-time aging test for 12 months, and only slight energy degradation (<7.5 %) was founded in Al/NiF 2 composite. Concerning combustion behavior, Al/NiF 2 composite showed relatively low flame brightness but a comparable pressure generation compared to Al/NiO composite, which is presumably attributed by the endothermic evaporation of AlF 3 . A notable finding is that hybrid Al/NiF 2 /NiO composite exhibits superior pressure output, and this composite is rather explosive even for small charge amount, which shows the potential as a novel primary explosive.
研究领域:
材料科学
·
燃烧与爆炸领域
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Meidan Que,Shenghui He,Yutian Li,Yuan Xu,Bo Li,Jian Wei,Lili Gao,Wei Huang,Shengzhong Liu
Organic–inorganic formamidinium lead triiodide (FAPbI 3 ) hybrid perovskite quantum dots (QDs) have garnered considerable attention in the photovoltaic field due to their narrow bandgap, exceptional environmental stability, and prolonged carrier lifetime. Unfortunately, their insulating ligands and surface vacancy defects pose significant obstacles to efficient charge transfer across device interfaces. In this work, an electrostatic harmonization strategy at the interface using a donor-acceptor dipole molecular attachment to achieve enhanced charge separation capabilities on the QD surface is ventured. On the basis of theoretical study and experimental evaluation, it has gained a comprehensive understanding of dipole-induced electronic restructuring at the quantum dot interfaces. It reveals that 3-fluoro-4-iodopyridine as a dipole source with appropriate energy levels and a high dipole moment effectively fills surface iodine vacancies (V I- ), leading to rapid separation of photoexcited charge carriers. Particularly enhanced hole mobility and hydrophobicity are achieved through strong electronegative effects of fluorine and iodine. Consequently, the FAPbI 3 QD solar cells achieve a power conversion efficiency as high as 14.11% with exceptional long-term stability in ambient. These perceptions provide effective interface engineering means for the hybrid perovskite QDs to advance their potential in high-performance optoelectronic applications.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yiyang Kang,Weichao Lin,Yinuo Wan,Lixia Bao,Xiao Xu,Yufei Wang,Pengpeng Liu,Jiliang Wang
Antifogging packaging is crucial for prolonging the shelf life of products in the fields of food, vegetable, and fruit preservation. To date, obtaining antifogging films with the merits of ease of preparation, facilitation of large-scale industrialization, and outstanding reliability through common thermoplasticization methods like film blowing is challenging. Herein, we develop a facile method to prepare hydrophilic core–shell nanocapsules with a particle size less than 200 nm, which are composed of the inner amphiphilic Span-80 molecules acting as main antifogging units and the outer cross-linked copolymeric networks as supramolecular lock-shell layers and supplementary antifogging units to prevent the rapid migration of Span-80 from the hydrophobic polyethylene (PE) host. Long-term antifogging PE films composed of PE pellets and different contents of the prepared hydrophilic nanocapsules are directly obtained by using the most industrialized film blowing technique. Chemical structure, optical, mechanical, thermal, and antifogging performances of the produced antifogging films are evaluated. The results reveal that the synthesized nanocapsules with the supramolecular lock-shell layer show outstanding storage stability, form stability, hydrophilicity, and thermal stability. PE films with the content of the encapsulated Span-80 nanocapsules of about 1.6 per hundred rate can exhibit excellent hydrophilicity. The practical antifogging effect of the produced nanocapsule-doped PE films reveals that the film can still show remarkable antifogging ability even after experiencing various harsh conditions such as friction, water washing, and long-term storage and that the film can effectively prolong the shelf time of common vegetable and fruit. The strategy of the fabricated antifogging PE films probably opens a new avenue to develop the next generation of long-term antifogging packaging films.
研究领域:
材料科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Shixiang Zhou,Li Yao,Hui Mei,Mingyang Lu,Laifei Cheng,Litong Zhang
As the operation reliability for gas sensors under complex environments is in increasing demand, the stability and safety performance are significant besides qualified gas sensing properties. In this work, structural-strengthened and self-protective ammonia sensing micro-tunnels were constructed by 3D printing . Modified methyl-silsesquioxane (MK) resin was employed as the feedstock to build the SiOC honeycomb structures . Polypyrrole (PPy) nanoparticle decorated TiO 2 arrays sensitized the structures to form inner gas-sensitive tunnels . The sensing structure exhibited high selectivity toward ammonia at room temperature. Response to 50 ppm NH 3 was 18.67%, while the response and recovery times were 119 and 86 s, respectively. The excellent long-term stability also ensured reliable operation in complex environments. More importantly, the enhanced honeycomb had an outstanding mechanical performance with the compressive strength , Young's modulus , and energy absorption of 33.72 MPa, 2.40 GPa, and 28.22 kJ/m 3 , respectively. It can serve as a load-bearing part of the fundamental component to avoid catastrophic collapse while maintaining a regular sensing capability under pressure loading as the excellent deformation resistance ensured the integrity and connection of the sensing layer. Moreover, the inner through-holes facilitated the exposure of the sensing tunnels to the atmosphere, which can detect target gas simultaneously without the embedding of extra sensors. Thus, the construction of self-protective gas sensing structures was promising to be an efficient strategy for reliable gas detection in extreme environments.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Shuai Chen,Wei Zhou,Yani Ding,Guang-Bo Zhao,Ji-Hui Gao
The potential energy of SO2 is wasted in the process of converting Na2SO3 to Na2SO4 via air oxidation during conventional treatment of SO2-contaminated air. Considering that the oxidation of Na2SO3 is thermodynamically and kinetically much easier than the oxygen evolution reaction (OER), this study proposes replacing the OER with Na2SO3 oxidation to recover the potential energy of SO2 and simultaneously reduce the energy consumption of water electrolysis. First, the influences of the reaction temperature and Na2SO3 concentration on Na2SO3-assisted water electrolysis (SAWE) were studied. Then, the difference between Na2SO3 electrolysis and water electrolysis was compared under optimum conditions. Furthermore, the long-term stability of SAWE was assessed. The results of this study suggest that the onset potential of water electrolysis decreases from 0.73 V vs saturated calomel electrode (SCE) to 0.28 V vs SCE by replacing the OER with Na2SO3 oxidation. The energy consumption of producing hydrogen by water electrolysis is reduced with the use of the potential energy of SO2. For SAWE, the Na2SO3 oxidation kinetics and hydrogen production rate are improved as the reaction temperature and Na2SO3 concentration increase.
研究领域:
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Rong Zhao,Zheyuan Wang,Qingli Xu,Xiaopo Niu,Yunxi Han,Yue Qin,Qingfa Wang
Developing highly active and stable electrocatalysts for acidic oxygen evolution reaction is still a great challenge. Herein, we developed a novel self-supported amorphous IrO x catalyst (IrO x /Ti) encapsulated with a small number of crystalline nanoparticles for efficient acidic OER. The resulting IrO x -50-AC/Ti electrode exhibits a superior OER performance with an overpotential of 250 mV at 10 mA cm −2 and Tafel slope of 50.4 mV dec −1 in 0.1 M HClO 4 . High contents of Ir III species and surface hydroxide groups, hierarchically porous structure and high defective density contribute to boost the OER activity. Importantly, the amorphous IrO x -50-AC/Ti also demonstrates a super long-term durability for 190 h due to the strong interaction between IrO x film and Ti. The unique amorphous-crystalline structure also enhances the stability and the activity by promoting the synergy between amorphous phase and crystalline phase. This work provides some valuable insights on developing efficient Ir-based catalysts for acidic water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yanyan Duan,Gen Zhao,Xiaotao Liu,Jiale Ma,Shuyao Chen,Yanlin Song,Xiaodong Pi,Xuegong Yu,Deren Yang,Yiqiang Zhang,Feng Guo
High power conversion efficiency (PCE) and good long-term stability are everlasting pursuit for perovskite solar cells. We present here CsPbBr 3 perovskite film deposited by vacuum co-evaporation of CsBr and PbBr 2 . By optimizing evaporation rate ratio of the two precursor and annealing temperature, perovskite films with large grain and high crystallinity are obtained. Furthermore, by regulating spinning speed of TiO 2 precursor solution and thickness of CsPbBr 3 film, a best PCE of 9.43% is recorded under 100 mW cm −2 illumination, providing a significant enhancement in contrast with 6.26% of device based on spin-coating method. Additionally, the PCE of resulting perovskite solar cell without encapsulation remains at 96% of initial value after storing for 480 h under humidity of 40% in air. Our findings in this work deliver an effective strategy to fabricate high-performance inorganic perovskite solar cells.
研究领域:
材料科学
·
太阳能技术
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 17
·2376-2382
·
IF 4.446
Gang Yuan,Xiaopo Niu,Zhichao Chen,Li Wang,Xiangwen Zhang,Qingfa Wang
Graphical Ni 3 S 2 acts as a noble catalyst : A 3D porous, defect rich, and self-supported Ni 3 S 2 @Ni foam with core-shell structure is fabricated as electrocatalyst for methanol fuel cells. The electrocatalyst shows Pt-like activity, high poison tolerance, and long-term stability towards methanol oxidation in alkaline media. Direct methanol fuel cells are promising renewable energy devices for automobiles and portable electronic devices. The development of high effciency, poison tolerance, long-term stability, and noble metal-free electrocatalysts for methanol oxidation is still a major challenge. Herein, we develop a noble metal-free, 3D self-supported, defect-rich, hierarchical shell-core structured Ni 3 S 2 composite on Ni foam as electrocatalyst. This electrocatalyst shows a good activity, poison tolerance, and long-term durability towards methanol oxidation in alkaline media. It shows the lowest onset potential (−340 mV vs. Hg/HgO) among all the Ni-based catalysts reported up to date and a Pt-level specific activity. The methanol oxidation peak current of the electrocatalyst retains more than 97.5 % even after 5,000 voltammetry cycles in 0.5 M KOH+1 M CH 3 OH. The morphology and composition of the electrocatalysts before and after stability test were characterized by SEM, TEM, XRD, and XPS. The high activity, poison tolerance, and stability are attributed to the binder-free, directly grown Ni 3 S 2 shell on the Ni foam backbone, the lattice defect sites, and the synergetic effects between the in-situ formed active NiO x core and Ni 3 S 2 shell during methanol oxidation. This work indicates that the self-supported hierarchical shell-core Ni 3 S 2 @Ni foam electrocatalyst is a viable alternative for commercial Pt-based electrocatalyst applied in fuel cells.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 19
·2011073
·
IF 18.808
Huiying Chen,Linlin Zhou,Zhi Fang,Shuize Wang,Tao Yang,Laipan Zhu,Xinmei Hou,Hailong Wang,Zhong Lin Wang
Inorganic lead halide perovskite has become an emerging material for modern photoelectric and electronic nanodevices due to its excellent optical and electronic properties. In view of its huge dielectric and electrical properties, inorganic CsPbBr 3 perovskite is introduced into the piezoelectric nanogenerator (PENG). Based on one-step electrospinning of solutions containing CsPbBr 3 precursors and polyvinylidene difluoride (PVDF), in situ growth of CsPbBr 3 nanocrystals in PVDF fibers (CsPbBr 3 @PVDF composite fibers) with highly uniform size and spatial distribution are synthesized. The CsPbBr 3 @PVDF composite fibers based PENG reveals an open-circuit voltage ( V oc ) of 103 V and a density of short-circuit current ( I sc ) of 170 µ A cm −2 , where the V oc is comparable to the state-of-the-art hybrid composite piezoelectric nanogenerators (PENGs) and the density of I sc is 4.86 times higher than that of lead halide perovskites counterpart ever reported. Moreover, CsPbBr 3 @PVDF composite fibers based PENG exhibits fundamentally improved thermal/water/acid–base stabilities. This study suggests that the CsPbBr 3 @PVDF composite fiber is a good candidate for fabricating high-performance PENGs, promising application potentials in mechanical energy harvesting and motion sensing technologies.
研究领域:
材料科学
·
纳米技术
·
能源 harvesting 技术
✓ 已验证
产品关联
DOI
高影响因子
NANO LETTERS
·
2021
·
IF 11.189
Chen Li,Shuai Zhou,Jing Nie,Jie Huang,Xiaoping Ouyang,Qiang Xu
Because of the extraordinary properties including high atomic numbers and large μτ products, metal halide perovskites have been widely employed and used for radiation detecting. Cs4PbI6 material has a high X-ray attenuation coefficient and excellent electrical properties that have a good potential in X-ray detection applications. Here, we have designed a flexible polymer-encapsulated Au/Cs4PbI6/Au X-ray detector with outstanding sensitivity of 256.20 μC Gy–1 cm–2 irradiated by 30 keV X-ray at 10 V bias, long-time stability, and durable flexibility without obvious degradation after bending for 600 cycles. These features demonstrate that this polymer-encapsulated durable flexible and sensitive X-ray detector could open a new possibility for next-generation radiation applications in dosimeter, imaging technologies.
研究领域:
材料科学
·
医学影像
·
辐射探测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Bionic Engineering
·
2021
·Vol. 18
·期 4
·887-899
·
IF 2.682
Tian Yanling,Feng Jiekai,Cai Zexin,Chao Jiaqi,Zhang Dawei,Cui Yuxiao,Chen Faze
Reckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）