Coatings
·
2025
·Vol. 15
·期 6
·630
·
IF 2.8
Zhaobin Lu,Baoxin Wang,Shengtao Li,Feiyan Pan,Xuewei Zhu,Xiaofeng Wei
In the “dual carbon” objective, the preparation of non-precious metal catalysts with low cost and high activity is essential for the study of hydrogen evolution reactions (HERs). This study employed biomass pomelo peel powder as the carbon source and ammonium metatungstate (AMT) as the tungsten source and, through a facile one-step method in molten salt, fabricated a biomass carbon-based nanocatalyst featuring carbon flakes adorned with tungsten carbide (WC) nanoparticles. Dicyandiamide and cysteine were introduced as nitrogen and sulfur sources, respectively, to explore the impacts of N-S elemental doping on the structure, composition, and HER performance of the WC/C catalyst. The experimental results showed that N-S doping changed the electronic structure of WC and increased the electrochemically active surface area, resulting in a significant increase in the HER activity of WC/C@N-S catalysts. The WC/C@N-S catalyst was evaluated with hydrogen evolution performance in a 0.5 mol/L H2SO4solution. When the cathodic current density reached 10 mA/cm2, the overpotential was 158 mV, and the Tafel slope was 68 mV/dec, underscoring its excellent HER performance. The outcomes offer novel insights into the high-value utilization of agricultural biomass resources, and pave the way for the development of cost-effective, innovative hydrogen evolution catalysts.
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ACS Nano
·
2025
·
IF 16
Yiqun Zhang,Yangyang Song,Sijian Lin,Xuyi Zhang,Zhuqing Wang,Xiaodong Wu
Natural skin receptors use ions as signal carriers, while most of the developed artificial tactile sensors utilize electrons as information carriers. To imitate the biological ionic sensing behavior, here, we present a kind of biomimetic, ionic, and fully passive mechanotransduction mechanism leveraging mechanical modulation of interfacial ionic p–n junction (IPNJ) through microchannels. Sensors based on this mechanism do not rely on an external power supply and can encode external tactile stimuli into highly analogous signal outputs to those of natural skin receptors, in terms of both signal type (i.e., ionic potential difference) and signal intensity (≈120 mV). More importantly, the instant interfacial IPNJ regulation characteristic endows the sensors with superior performance when compared to the state-of-the-art piezoionic sensors, including a low detection limit of 0.01 N, fast response/recovery speeds (16 ms/16 ms), ultralow power consumption (pW level), excellent reproducibility (over 100,000 cycles), and good capabilities to resolve both static and dynamic mechanical stimulations. As demonstrations, machine-learning-assisted high accuracy (over 99%) surface texture recognition and object classification are successfully demonstrated with the sensors integrated on robotic hands. This work enriches the family of mechanical sensing mechanisms and provides a path to mimicking natural tactile sensory systems for smart skins, artificial prostheses, and intelligent robots.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yujie Gao,Xiangyu Dang,Ahai Zhu,Zhize Chen
Hydrogels exhibiting excellent biocompatibility and resistance to foreign body response (FBR) hold significant promise in the biomedical field. In this study, we developed a photopolymerized hydrogel named poly(3,3′-((2-(2-((3-methacrylamidopropyl)amino)-2-oxoethyl)-4-((3-methacrylamidopropyl)carbamoyl)-2,4-dimethylhexanedioyl)bis(azanediyl))bis(N,N-dimethylpropan-1-amine oxide))(PIAPMANOX), whose prepolymer is based on poly(itaconic acid)(PIA) and is grafted with varying ratios of zwitterionic trimethylamine N-oxide (TMAO) derivatives and N-(3-aminopropyl)methacrylamide hydrochloride (APMA). The TMAO derivatives possess the ability to form a compact hydration layer due to their distinctive properties─namely, the minimal spacing between zwitterionic groups, the robust hydrogen bonding interactions, the smallest net charge, and the lowest dipole moment. These characteristics collectively promote the establishment of a tightly packed hydration shell that effectively inhibits nonspecific adsorption of substances such as proteins and cells. Meanwhile, APMA contributes a carbon–carbon double bond that promotes photoinitiated radical polymerization for constructing a three-dimensional hydrogel network. Among the various materials studied, the hydrogel PIAPMANOX, which incorporates the zwitterionic TMAO, demonstrates exceptional performance in terms of protein and cell rejection. The hydrogel was implanted into the peritoneal cavity of mice. Experimental results demonstrated that this hydrogel significantly reduced FBR, with no notable inflammatory reaction observed and a decrease in fibrosis. Therefore, the PIAPMANOX series introduces innovative nontoxic zwitterionic materials to the field of biomaterials.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Na Jin,Xiao Yang,Yong Li,Wanjing Lai,Hailin Jiang,Yanghua Li,Kuo Liu,Yimeng Cai,Linjie Zhang,Lili Han
Hydrogen, characterized by its high energy density, efficiency, and environmentally benign output, emerges as a promising alternative to fossil fuels. However, the development of robust hydrogen oxidation reaction (HOR) catalysts for efficient energy conversion remains a significant challenge. Herein, a NiRu nanoalloy catalyst supported on N-doped hollow carbon nanocages (NiRu/NC) is synthesized via a tandem pyrolysis method. The NiRu/NC catalyst exhibits superior alkaline HOR activity, achieving diffusion-limited current density of 2.56 mA cm–2 and maintaining stability for 80,000 s with a decay rate of only 5.9%, compared to a 28.7% decay rate for benchmark Pt/C after 35,000 s. Additionally, it demonstrates remarkable resistance to CO poisoning, with the current density decreasing by only 50.7% after 1800 s, while the current density of Pt/C dropped to 0 after 800 s. Density functional theory calculations indicate that Ni in the NiRu nanoalloy effectively modulates the electron distribution, thereby ameliorating the electronic structure and enhancing the adsorption of reaction intermediates. These optimizations endow NiRu/NC with both favorable hydrogen-binding energy (HBE) and hydroxyl-binding energy (OHBE), leading to improved HOR efficiency. This work not only offers an innovative approach for synthesizing high-performance alloy-based HOR catalysts but also deepens the fundamental understanding of the bimetallic synergistic mechanisms in HOR catalysis.
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Frontiers in Physiology
·
2021
·
IF 4.566
Qing Fang,Binjie Zheng,Na Liu,Jinfeng Liu,Wenhui Liu,Xinyi Huang,Xiangchang Zeng,Lulu Chen,Zhenyu Li,Dongsheng Ouyang
The gut microbiota plays a pivotal role in the onset and development of diabetes and its complications. Trimethylamine N-oxide (TMAO), a gut microbiota-dependent metabolite of certain nutrients, is associated with type 2 diabetes and its complications. Diabetic kidney disease (DKD) is one of the most serious microvascular complications. However, whether TMAO accelerates the development of DKD remains unclear. We tested the hypothesis that TMAO accelerates the development of DKD. A high-fat diet/low-dose streptozotocin-induced diabetes rat model was established, with or without TMAO in the rats’ drinking water. Compared to the normal rats, the DKD rats showed significantly higher plasma TMAO levels at the end of the study. TMAO treatment not only exacerbated the kidney dysfunction of the DKD rats, but also renal fibrosis. Furthermore, TMAO treatment activated the nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3 (NLRP3) inflammasome and resulted in the release of interleukin (IL)-1β and IL-18 to accelerate renal inflammation. These results suggested that TMAO aggravated renal inflammation and fibrosis in the DKD rats, which provides a new perspective to understand the pathogenesis of DKD and a potential novel target for preventing the progression of DKD.
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Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 19
·3723-3733
·
IF 7.571
Qing Hao,Jinghong Wang,Jie Shen,Rong Gu,Yu Rao,Jian Feng,Huanhuan Wang,John L. Brash,Hong Chen
In analogy with adsorbed protein films, we have fabricated a family of 2D nanofilms composed of poly(N-vinyl caprolactam-co-vinylimidazole) (PNVCL) nanogels. NVCL was copolymerized with 1-vinylimidazole (VIM), and then cross-linked with α,ω-dibromoalkanes with 2 to 8 carbons via quaternization to form the nanogels. The swelling ratio of the gels was precisely controlled by regulating the inter-chain spacing of the polymers at the level of the carbon atom chain length of the cross-linker. The short-chain alkanes used are relatively rigid and their dimensions provide an accurate estimate of the chain spacing in the nanogels. It was shown that small differences in the carbon atom number of the cross-linking agent led to significant differences in the mechanical properties of the nanogels, in particular in the softness, deformability, and contact area (in film form), all of which increased with increasing carbon number. Films of the softer gels not only showed good adhesion to a number of substrates, but were also mechanically robust. In addition, the films showed excellent light transmission and nontoxicity to L929 cells. Nanogels of intermediate softness were shown to inhibit the adhesion of bacteria and human umbilical vein smooth muscle cells (HUVSMCs), and to be resistant to the adsorption of the plasma protein fibrinogen, indicating strong anti-biofouling properties. Gels that were either too stiff or too soft showed somewhat weaker anti-fouling activity in terms both of HUVSMCs adhesion and protein adsorption.
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高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 48
·41788-41797
·
IF 9.5
Wenjie Li,Zeqing Hu,Ziwang Zhang,Zehao Lin,Min Ruan,Jiahao Jiang,Jing Shuai
Enhancing the thermoelectric performance of n-type polycrystalline SnSe remains challenging due to the trade-off between carrier transport and lattice thermal conductivity. Here, we demonstrate that trace incorporation of the lead-free perovskite Cs2TiCl6 enables concurrent optimization of these factors in SnSe0.93. The [TiCl6]2− octahedral framework introduces effective electron donors, while Ti 3d states induce local band flattening, increasing the density-of-states effective mass without severely degrading weighted mobility. Consequently, the 0.5 wt% Cs2TiCl6 sample attains a high power factor of ∼532.1 µW m−1 K−2 at 823 K. Meanwhile, Ti-rich domains together with multi-scale structural defects (strain fields, dislocations, and twin boundaries) substantially intensify phonon scattering, driving the lattice thermal conductivity down to ∼0.32 W m−1 K−1 at 823 K—a 40.6% reduction relative to the pristine specimen. Benefiting from this synergistic carrier and phonon engineering, a peak ZT of ∼1.2 at 823 K is achieved for 0.5 wt% Cs2TiCl6, representing a 179.1% enhancement over undoped SnSe0.93 and outperforming most reported n-type polycrystalline SnSe-based materials. This work establishes trace lead-free perovskite doping as a dual-function strategy—simultaneously enabling band structure modulation and phonon mean free path suppression—offering a viable route toward environmentally benign, high-efficiency n-type SnSe thermoelectrics.
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Chemistry-An Asian Journal
·
2025
·
IF 3.3
Boyu Jia,Li Ju,Fancang Meng,Huan Wu,Kexiang Li,Qingmin Ji
The chemical modification and self-assembly capability of fullerenes offer advantageous conditions for tailoring Fe/N-doped carbon-based catalysts. However, their strong π–π stacking tendency may partially restrict metal loading and the generation of active Fe species. Therefore, how to utilize the distinctive features of fullerenes to precisely regulate and optimize Fe–N active sites along with their local coordination environment remains challenging. In this work, water-soluble C 60 (wsC 60 ) was synthesized via a facile interfacial oxidation process. The presence of –OH on the C 60 cage may strengthen its binding affinity with Fe 3+ ion and effectively modulate the incorporation of Fe/N into the C 60 -derived carbon electrodes. By varying the wsC 60 /Fe 3+ mixing ratios followed by pyrolysis under NH 3 , we obtained Fe/N-doped carbons (FeN@wsC 60 -900) with distinct Fe/N-doping states, including FeN 4 , O–FeN 4 /Fe cluster, and FeN 4 /Fe cluster. The abundant –OH in wsC 60 also promoted the formation of a highly porous network, enhancing active site accessibility. The resultant FeN@wsC 60 -900 exhibited excellent oxygen reduction reaction (ORR) activity, outperforming both conventional C 60 -derived carbons and commercial Pt/C. Structural characterizations and density functional theory (DFT) simulations revealed that the O-coordinated Fe–N 4 with adjacent Fe cluster could optimize the coordinate geometry and adsorption energies of key ORR intermediates.
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Small
·
2025
·Vol. 21
·期 27
·2412833
·
IF 12.1
Deshang Xiang,Yaru Gong,Chen Chen,Rongxin Sun,Song Zhao,Yuqi Liu,Qingyang Jian,Yanan Li,Wei Dou,Di Li,Pan Ying,Guodong Tang
PbSe has garnered significant attention due to its earth-abundance and low cost of Se element. Here the synthesis of Zn and Sn co-doped n -type PbSe with noteworthy thermoelectric performance enhancement is reported. Microstructural characterization and first-principles calculations demonstrate that Zn occupies the interstitial site between Se tetrahedra in PbSe, thereby creating a high-density network of needle-like defects that induces lattice strain and reduces the lattice thermal conductivity. Zn interstitial doping provides additional free electrons, leading to sharp increase of carrier concentration. DFT calculation reveals that orbital splitting of VBM boosts carrier mobility of PbSe. The significantly enhanced carrier mobility produces high power factor in the whole temperature range. As a result, a high peak ZT of 1.7 is realized for Zn and Sn co-doped n -type PbSe with a remarkable average ZT of 1.2 over the temperature range of 423–873K. These findings demonstrate that combining orbital splitting and interstitial doping is an effective strategy to synergistically optimize the electrical-thermal transport of n -type PbSe, making it a promising candidate for energy conversion applications.
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Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Cheng Lv,Qingjie He,Yongjin Zou,Ruoyang Zhang,Hanjie Wen,Jiayan Huang,Jing Zhi,Cuili Xiang,Lixian Sun,Yong Shen Chua
MgH 2 shows promise for solid-state hydrogen storage because of its high gravimetric capacity (7.6%) and ecofriendliness but cannot be easily commercialized because of its sluggish dehydrogenation/rehydrogenation kinetics and high thermodynamic stability. Herein, Ce/N–codoped TiO 2 (CN-T) synthesized using a solvothermal/calcination method was composited with MgH 2 to enhance its hydrogen storage performance. The composite with a CN-T loading of 7 wt% started releasing H 2 at 187.2 °C and released 6.45 wt.% H 2 in 180 s at 301 °C, which corresponded to nearly complete dehydrogenation. The residue could be rapidly rehydrogenated, with hydrogen contents of 3.24 and 5.45 wt% achieved in 1 min at 100 °C/20 bar H 2 and 5 min at 200 °C/20 bar H 2 , respectively. This performance enhancement was attributed to the combined effects of doped N, multivalent Ti, and Ce. The doped N weakened Mg–H bonds via charge transfer and modified the electronic state density of MgH 2 . Ti catalyzed H 2 dissociation/recombination through dynamic valence cycling and D-electron injection, and the introduction of Ce 3+ created O vacancies, which lowered the electron density of Mg–H bonds, generated strain fields for hydrogen release, provided diffusion pathways, and introduced bandgap states to strengthen electron–hydrogen coupling. Thus, this study paves the way for the commercialization of MgH 2 as a green high-capacity hydrogen carrier for diverse applications.
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CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Sha Li,Yangchun Qu,Xifei Yu,Wei Xue,Zonghua Liu
In recent years, cancer immunotherapy as a new generation of cancer treatment strategy has displayed promising potential and attracted more and more attention. However, tumor-associated antigens if used alone could not induce potent immune responses. Therefore, efficient tumor treatment demands the assistance of vaccine delivery systems to elicit strong anti-tumor immune responses. In this study, a novel cell membrane adhesive vaccine carrier— n -hexadecyl choline phosphate (C16-CP) was synthesized and evaluated for the delivery of model antigen ovalbumin (OVA) and for anticancer therapy. Choline phosphate (CP) group is orientated opposite to and hence has electrostatic attraction with the phosphatidylcholine group of cell membrane component dipalmitoyl phosphatidylcholine. Moreover, CP group was hydrophobically modified with n -hexadecyl chain to prepare a cell membrane adhesive molecule C16-CP, which could adhere to cell membrane through electrostatic attraction and hydrophobic interaction. The CP group is positively charged at neutral pH environment. Hence, the cationic lipid C16-CP could interact with OVA through electrostatic attraction and hydrophobic interaction. In this work, the potential of C16-CP to assist antigen delivery was evaluated in order to develop a novel vaccine delivery system.
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International Journal of Applied Ceramic Technology
·
2025
·Vol. 23
·期 1
·e70126
·
IF 2.3
Shuhui Chen,Qinxing Xie
Ca 1- x Y x MnO 3 and Ca 1- x Y x Mn 1- y Nb y O 3 (0 ≤ x , y ≤ 0.07) thermoelectric ceramics were fabricated via microwave-assisted calcination followed by conventional sintering. The effects of substituting Ca with Y and Mn with Nb on the microstructure and power factor ( PF ) were systematically investigated. The results indicate that the crystal structure of CaMnO 3 remains unchanged upon doping. Electrical conductivity increases, while the absolute value of the Seebeck coefficient decreases with increasing dopant concentration in both series of compounds. Consequently, the PF for Ca 1- x Y x MnO 3 increases continuously within the range of doping amount (0 ≤ x ≤ 0.07), whereas that of Ca 1- x Y x Mn 1- y Nb y O 3 initially increases with x = y ≤ 0.02, and then decreases for 0.02 < x = y ≤ 0.06. In addition, the PF increases for all samples as the temperature increases. The maximum PF achieved are 127 µW m −1 K −2 for Ca 1- x Y x MnO 3 ( x = 0.07), and 154 µW m −1 K −2 for Ca 1- x Y x Mn 1- y Nb y O 3 ( x = y = 0.02). These results demonstrate that the co-doping of CaMnO 3 with Y/Nb is more effective in improving the electronic transport characteristics than single Y-doping.
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