ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ya-Nan Zhang,Shuai Feng,Shi-Hua Zhao,Bo-Wen Gao,Cheng-Xiang Wang
Perovskite solar cells (PSCs) have emerged as a leading photovoltaic technology due to their high efficiency and low cost. Even though they have developed rapidly since their inception, with efficiencies of over 26%, inverted PSCs face challenges such as nonradiative recombination and ion migration. Surface treatment, especially the utilization of organic compounds, has improved efficiency and stability by optimizing the perovskite–charge transport layer interface. Herein, we report a facile and effective strategy by introducing 2,2′-bipyridyl to modify the surface of perovskite, achieving a power conversion efficiency of 24.43% with increasing open-circuit voltage and fill factor and good repeatability on multiple devices. We reveal that the 2,2′-bipyridyl molecule can chelate lead ions on the surface of perovskite, effectively suppressing nonradiative recombination. Furthermore, this modification can induce surficial n-doping to refine the energy level alignment, thereby minimizing charge transport losses. Additionally, the device maintained over 92% of the initial efficiency after 1000 h of operation at the maximum power point under continuous illumination. This surface chelation and defect passivation strategy employing 2,2′-bipyridyl offers a promising avenue for exploring the details of potential long-term degradation mechanisms and the development of commercially viable high-performance p-i-n PSCs.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chen Wang,Shugang Wang,Junkai Zhang,Wenji Song,Jihong Wang
The growing demand for efficient thermal management has increased the importance of phase change materials (PCMs). Microencapsulation technology mitigates the leakage issue of liquid-state PCMs. However, enhancing the thermal conductivity and structural stability of microencapsulated PCMs (MEPCMs) remains a challenge. Graphene oxide (GO) and its chemically functionalized derivatives have shown great potential in enhancing the performance of MEPCMs. In this study, GO and octadecylamine-grafted GO (GO-ODA) were employed as thermally conductive fillers to modify n -octadecane@melamine-formaldehyde resin microcapsules. Four formulations were developed by varying the spatial distribution of GO and GO-ODA within the microcapsules. The dispersion of GO-ODA in the core was found to reduce defects in the shell structure, while distributing the additives across the core, interface, and shell promoted the formation of a continuous thermal conduction network. The experimental results indicate that, with a filler content of 0.2 wt%, the thermal conductivity increased by 5.8 times, reaching 0.587 W/(m·K), compared to the unmodified MEPCM with a value of 0.086 W/(m·K). Additionally, the leakage rate was reduced by 87.5%, significantly enhancing the structural stability of the microcapsules.
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LANGMUIR
·
2025
·
IF 3.9
Chenxiang Feng,Wei Jian,Junxiu Chen,Agula Bao
The environmental problems caused by excessive CO2 emissions have made the development of adsorbent materials for capturing CO2 an important topic. N-doped porous carbon materials are attractive for CO2 adsorption because of their large specific surface area, porous structure, and multiple active sites. S and N are known to work well together as codopants, but the effects of S on N and the synergistic effects of S and N on carbon materials need to be clarified. In this study, N and S codoped porous carbon samples with an ultramicroporous structure were prepared by using lignin as the carbon source and thiourea as the sulfur source. The prepared samples had a specific surface area of up to 1723 m2/g and N and S contents of up to 1.60 at % and 0.23 at %, respectively. In tests, the best-performing sample had a CO2 adsorption capacity of 3.58 mmol/g at 298 K and 1 bar, which can be attributed to ultramicropores (<1 nm) making up 67.8% of the pore volume. S doping had the synergistic effect of increasing the pyrrole N content on the sample surface, which increased the CO2 adsorption capacity. The present study provides insights into using N and S codoping to develop high-efficiency carbon-based adsorbents for CO2 capture.
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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Naike Wang,Tian Xia,Shuo Wu,Peng Zhu,Mengmeng Guo,Bo Liang
The development of polymeric materials combining high mechanical strength with environmentally adaptive self-healing capability represents a key objective in smart materials research, particularly for wearable biomedical applications. This study synthesized a polyurethane-based material (PUAM) incorporating poly(N-isopropylacrylamide) (PNIPAM), and varying contents of custom-synthesized ureido-pyrimidinone (UPy) units with quadruple hydrogen bonds to investigate humidity-responsive self-healing behavior. Fourier transform infrared (FTIR) spectroscopy demonstrated a progressive increase in hydrogen bonding index (HBI) with higher UPy content. Dynamic mechanical analysis (DMA) further revealed monotonic enhancements in both storage modulus and dynamic crosslinking density ( V d ). Optical microscopy observations of scratch closure under different humidity conditions and NaCl vapor environments confirmed effective humidity-responsive self-healing, with performance positively correlating with UPy concentration. Water contact angle and hygroscopicity measurements show that a high UPy content improves the moisture absorption performance of the material. The absorbed water molecules function as plasticizers to enhance polymer chain mobility and facilitate hydrogen bond reorganization, thereby improving self-healing performance. This work provides a feasible strategy for designing high-performance smart materials with tunable humidity-responsive healing properties.
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ACS Nano
·
2025
·
IF 16
Yanrong Wang,Shigui Qiu,Shengwen Tan,Huaizhu Wang,Xuemei Wang,Chenxi Zheng,Lubin Ni,Guowang Diao,Caixing Wang,Zhong Jin
To synergistically combine the features of high specific capacity of n-type organic materials with the high voltage of p-type organic materials, bipolar phenolthiazine-based cathodes with p-type/n-type structures are gaining increased attention for aqueous zinc-ion batteries (AZIBs). Nevertheless, their small molecular structure often leads to dissolution during cycling. To address the challenge, a bipolar poly(phenothiazine iodide-3,3′-diaminobenzidine), abbreviated as P(PTD-DAB), was synthesized as a cathode material. Through comprehensive spectroscopic analyses, we elucidated a cooperative p-type/n-type dual-ion storage mechanism. Specifically, the N atom in the phenothiazine core stores Zn2+ or H+ cations via n-type reactions, while the N atoms connecting phenothiazinium tetraiodide and 3,3′-diaminobenzidine monomers, along with S atoms, act as p-type active sites for storing OTF– anions. The material delivers an average operating voltage of 1 V and achieves a high specific capacity of 211.8 mAh g–1 at a low current density of 0.1 A g–1. Additionally, it shows 90% capacity over 3600 cycles at a high current density of 3 A g–1 while sustaining robust stability at a high mass loading of active cathode (10 mg cm–2). Furthermore, flexible belt-shaped cells maintain 88% capacity retention over 550 cycles at 3 A g–1 even when subjected to repeated bending conditions. This work represents a great advancement in developing bipolar polymers for high-performance AZIBs and offers valuable insights into their design principle and functionality.
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Energy Material Advances
·
2024
·
IF 14.8
Xin Wu,Peiyao Liu,Bingchen Huo,Yiyang Li,Shuang Liu,Yifan Lv,Cun-Yue Guo
Organic thermoelectric materials are not only used in low-grade waste heat recovery but also have frontier applications in sensors, wearable self-powered devices, biomaterials, and smart materials with the development of flexible electronics. However, investigation on the thermoelectric performance of single-walled carbon nanotubes (SWCNTs) comparable to that of conducting polymers and their composites with SWCNTs has been rarely attempted, and there were few reports on SWCNTs alone as organic thermoelectric materials. Certainly, SWCNTs possess high Young’s modulus, high thermal stability, flexibility, lightweight, easily controllable doping level, and facile p–n transition, while the mechanism of molecular doping of SWCNTs remains to be well understood. Here, facile solution processing achieved the enhancement of p-type and n-type thermoelectric performance of SWCNTs. Small-molecular-weight polyethylene glycol treatment improved electrical conductivity and the Seebeck coefficient of SWCNTs (p-SWCNTs) simultaneously, with the power factor of 303.17 ± 46.25 μW·m−1·K−2. Small amount of polyethylenimine doping made the Seebeck coefficient of SWCNTs (n-SWCNTs) turn negative and rendered great air stability of n-SWCNTs. The electrical conductivity and power factor of n-SWCNTs reached 1,702.56 ± 164.13 S·cm−1 and 418.49 ± 46.30 μW·m−1·K−2 at 298 K, respectively. The power factor of n-SWCNTs got even higher at 319.5 K in vacuo, reaching a high value of 643.35 μW·m−1·K−2. Finally, mechanism study in this work provided inspiration and guidance for the application of these types of dopants in the performance improvement of SWCNTs.
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Food Chemistry-X
·
2025
·
IF 8.2
Yingyi Lin,Yong Wang,Ying Li
Camellia oleifera Abel. is an important woody oilseed tree to help increase the self-sufficiency rate. In this study, lipid extraction focuses more on the solvent extraction of Camellia seed oil (CO) cakes rather than conventional cold pressing, where the performance of candidate alternative green solvents selected from hurdle technology was first evaluated. Compared to n-hexane (89.50 ± 0.00 %) and subcritical n-butane (83.75 ± 0.43 %), 2-methyloxolane (2-MeOx) performed the best with the comprehensive consideration of extraction ratio (94.79 ± 0.00 %), lipid composition and environmental impact (0.38 ± 0.07 kg of CO 2 emission). Intriguingly, 2-MeOx exhibited the highest diffusion rate at both 25 °C and 55 °C in the extraction kinetic study, which could also extract the highest total phenolic contents (351.6 ± 0.02 mg GAE/kg dw) corresponding to its best oxidative stability. Besides, Hansen solubility modeling could help better understand the dissolving mechanism. 2-MeOx was demonstrated as the optimal alternative bio-based solvent to n-hexane with comparable extractability and selectivity in the CO extraction.
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Matter
·
2025
·
IF 17.5
Xinghe Xu,Fu-Lin Gao,Lin Tian,Zhi-Yue Yang,Zhong-Zhen Yu,Jie Shang,Run-Wei Li,Xiaofeng Li
Flexible, self-powered thermoelectric temperature sensors with high reliability are increasingly recognized as essential components in tactile perception, wearable technologies, and medical monitoring. To fulfill the performance requirements of these applications—specifically, achieving high Seebeck coefficients and superior resolution—traditional fabrication strategies typically rely on intricate molecular engineering, microscale structural optimization, or macroscale topological design. However, these approaches often involve complex manufacturing processes and elevated production costs, constraining large-scale deployment. Here, we propose a simple multilayer assembly approach that harnesses a self-permeation effect to enable the facile and cost-effective fabrication of flexible thermoelectric sensors with significantly improved sensitivity and resolution. By inducing intensive p-n heterojunctions through self-permeation and leveraging phonon scattering at multilayer-structured interfaces, the obtained sensor exhibits an unprecedented sensitivity of 1,203.6 μV K −1 and an ultimate temperature difference detection capability of 0.001 K, showcasing great potential for applications in three-dimensional environmental monitoring and bionic robotic tactile sensing.
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APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2025
·
IF 3.3
Zhao Bingshan,Micklefield Jason,Wang Yonghua,Wang Fanghua
N-trans -feruloyltyramine (FLA) is one kind of phenylpropanoid compound found in various plants. Numerous studies have confirmed that it exhibits a wide range of physiological functions, such as antioxidant, ɑ-glucosidase inhibition, and anti-inflammatory activity. However, the low content of FLA in plants greatly limits its potential use in food and pharmaceutical industries. It is, therefore, very important to establish an effective synthesis of FLA. In this study, a green and efficient method to synthesize FLA was sought using an amide bond synthetase (ABS) biocatalyst. Ten kinds of ABS enzymes, including AlCfaL from Azospirillum lipoferum , were screened as the potential biocatalysts for the production of FLA. To obtain optimum reaction conditions, the effects of various parameters on conversion of FLA were firstly evaluated. Under the optimum conditions using 1 mM N-trans -ferulic acid, 50 mM tyramine (substrate ratio of 1:50), 10 mM MgCl₂, 8 mM ATP, and 35 µM AlCfaL enzyme at 30 °C with a shaking speed of 500 r/min for 48 h, maximum conversion rate of 74% was reached. Given that the amidation reaction is mediated by relative expensive ATP, we further optimized reaction systems to incorporate an ATP recycling system consisting of a polyphosphate kinase enzyme (CHU) and an inexpensive polyphosphate (PolyP) as the phosphate donor. Response surface methodology (RSM) based on five-level, five-variable central composite design (CCD) was used to evaluate the optimal parameters for the production of FLA. The effects of AMP, PolyP, AlCfaL, CHU concentrations, and reaction time on the conversion rate of FLA were analyzed. The optimum conditions derived via RSM were 7.12 mM AMP, 5.96 mg/mL PolyP, 39.72 μM AlCfaL, 27.68 μM CHU, and a reaction time of 36 h. Validation experiments conducted under these optimized conditions yielded an actual conversion rate of 63.5%, which compared well to the maximum predicted value of 64.2%.
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ChemPlusChem
·
2025
·
IF 2.8
Wen Feng,Congyue Sun,Xiaojin Li,Xiliang Luo,Liu Wenqi
The exploitation of an efficient and stable oxygen reduction reaction (ORR) catalyst plays a crucial role in the slow kinetics of the cathode in proton exchange membrane fuel cells (PEMFC). In this study, a catalyst loaded with PtCo alloys on Co and N co-doped carbon nanotubes (PtCoNC) was synthesized for oxygen reduction reaction, which has high activity and stability. The carbon nanotube structure provides efficient transport channels for reactant exchange and product transport, as well as provides a wealth of triple-phase sites, that improves the utilization of Pt. Further, the PtCoNC catalyst exhibits robust metal-support interactions, which can be attributed to the anchoring of the Co-Nx sites to Pt. Theoretical calculations indicating an increase in binding energy and a reduction in layer spacing provide conclusive verification of the presence of augmented interactions between PtCo nanoparticles and the support. As a result, the low Pt-loaded (0.025 mg cm-2) PtCoNC catalyst demonstrates superior ORR activity to that of commercial Pt/C with an impressive half-wave potential of 0.893 V in 0.1 M HClO4 solution. At 0.9 V, its mass activity and specific activity are 3 and 2.6 times that of commercial Pt/C, respectively. It also shows better stability in acidic environment.
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JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
·
2025
·Vol. 29
·期 7
·e70539
·
IF 4.2
Tianyi Ji,Xiangying Li,Jiachen Li,Guan Wang
Wnt signalling is a highly conserved signalling pathway that plays an important role in a variety of biological processes. Frizzled (Fzd) family proteins are receptors for Wnt ligands. The physiological processes involved in mature trafficking of Fzd proteins remain elusive. Here, we identified asparagine residues 59 and 144 as the N-glycosylation modification sites of Fzd4. Sequence analysis of Fzd4 in different species showed that the two asparagine residues were highly conserved. N-glycosylation modification of Fzd4 is indispensable for its maturation and transport to the plasma membrane. N-glycosylation modification enhances the stability of Fzd4 and is also necessary for Fzd4 activity, which promotes Fzd4 interaction with Wnt ligands and co-receptor Norrin. Knockout of Fzd4 in the non-small cell lung cancer (NSCLC) cell line A549 followed by replenishment of Fzd4 glycosylation site mutants inhibited the growth and migration ability of A549 cells in vitro and in vivo. In summary, we identified N-glycosylation modification sites of Fzd4. N-glycosylation modification of Fzd4 is necessary for its stability and activity. When N-glycosylation modification is absent, Fzd4 cannot mediate the Wnt/β-catenin signalling pathway, which can inhibit the proliferation and migration of NSCLC and provide new targets and strategies for the treatment of NSCLC.
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Sustainability
·
2025
·Vol. 17
·期 10
·4358
·
IF 3.3
Yuantao Han,Yuchuan Ye,Wanjin Yu,Shaohong Zang,Lili Ji,Shijie Li,Liuye Mo
The synthesis of high performance catalysts for the catalytic wet oxidation (CWO) of N-methyldiethanolamine (MDEA) in water remains a challenge, and is a topic of considerable importance in relation to sustainability. In this paper, a Ru-CNx/CeO2catalyst was synthesized through a modified impregnation process for the CWO of MDEA, exhibiting a high activity of 80% COD removal at 180 °C and 2.5 MPa. EPR, Raman, and XPS characterizations revealed that the CNxspecies facilitated the reduction in Ru4+to Ru0species and enhanced the Ru–Ce interaction to form a high-density Ru-O-Ce structure with Ce3+sites, which strongly correlate to the generation of oxygen vacancies. The oxygen vacancies enabled the adsorption and activation of the oxygen, generating active species (h+, ·O2−, and ·OH) that effectively oxidized the MDEA during the catalytic reaction.
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