PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·Vol. 27
·期 37
·19939-19949
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IF 2.9
Zhangheng Lai,Xiangbin Chen,Qixian Zheng,Zhengmao Luo,Zhongshuo Li,Ning Qi,Zhiquan Chen
Polycrystalline SnSe has been widely explored due to its relatively low thermal conductivity. Yet its thermoelectric performance is limited due to its poor electrical conductivity. In this work, polycrystalline SnSe alloyed with different contents of CuAgSe were fabricated by a high-energy balling and melting method, combined with spark plasma sintering. It is revealed that substitution of Ag and Cu at Sn sites actually enhances the electrical conductivity, especially under Sn-deficient circumstances where the formation energy of AgSn is lowered. When there was excessive addition of CuAgSe, the hole carrier concentration was reduced due to the formation of Agi, which acts as an electron donor. Additionally, partial substitution of Ag and Cu into the Sn vacancies slightly improves the Hall mobility and the density of states effective mass. With increased electrical conductivity while maintaining a stable Seebeck coefficient, the Sn0.99Se sample alloyed with 0.75% CuAgSe attains a maximum power factor of 6.40 μW cm−1 K−2 at 847 K. In addition, a peak zT value of 0.97 at 847 K is achieved, combined with only a marginally decreased thermal conductivity, thereby exhibiting a prominent improvement over that of the pure SnSe sample. The present work opens up a new perspective for optimizing the thermoelectric performance of SnSe compounds with the strategy of tuning the content of Sn and alloying with CuAgSe.
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ChemCatChem
·
2025
·
IF 3.9
Zhi Cao,Haitao Cao,Chao Liu,Zhongxiang Fan,Yixiang Shi,Yin Wang,Tao Shen,Lei Li,Gang Qi
Here, a series of schiff-base porous organic polymer-supported silver-nanoparticle, Ag0 NPs@PPTA-x were prepared with a two-step ion coordination/hydrogen reduction. The resulting composite Ag0 NPs@PPTA-9.08 shows excellent catalytic performance for HMF oxidation to HMFCA, and an impressive HMFCA yield of 99.3% was achieved under optimal condition (NaOH 1.5 eq, 50 mL/min air flow, 20 °C, 6 h). Analysis techniques such as ICP-OES, XRD, TEM, SEM, N2 adsorption-desorption, and XPS were employed to characterize the structure and properties of Ag0 NPs@PPTA-x. The results indicate that the coordination of the nitrogen atom is the key factor for the higher activity and stability of Ag0 NPs@PPTA-9.08. The results of leaching and reusing tests as well as structural characterization (XRD, SEM, and FT-IR) shows that the Ag0 NPs@PPTA-9.08 has good stability and robustness structure. Furthermore, a gram-scale oxidation of HMF indicates this catalytic system can be readily scaled up to an industrial level. Finally, the results of other aldehydes oxidation over Ag0 NPs@PPTA-9.08 indicate the good substrate adaptability of the Ag0 NPs@PPTA-9.08. This work provides a new method for stabilizing nano-silver catalysts and opens up a simple avenue to selective oxidation of aldehydes that easily to scaled up.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Ping Cao,Yaohao Zhang,Yi Gao,Limei Zhang,Zhengyang Ji,Xinyue Cong
Organic–inorganic hybrid perovskite solar cells (PSCs) have attracted significant attention in recent years due to their exceptionally high theoretical photoelectric conversion efficiency. Although substantial breakthroughs have been made in controlling the bandgap by adjusting the ratio of organic–inorganic compounds, research on the electron transport layer (ETL) and hole transport layer has been largely overlooked, which greatly limits the further development of PSCs. In this study, a multilayer electron transport layer (ETL) was constructed based on ZnO nanofilms, utilizing MgO and SnO2 with similar lattice dimensions to create a multilayer nanofilm structure. This design achieved energy level alignment, reduced exciton migration energy, and suppressed nonradiative recombination. Compared to the ZnO-SnO2 bilayer ETL, the ZnO-MgO-SnO2 multilayer ETL demonstrated a 142% improvement in photoelectric conversion efficiency. Finite element analysis from a microscopic perspective revealed the influence of MgO on carrier concentration. Additionally, first-principles calculations elucidated the transition of MgO from an insulator to a wide-bandgap semiconductor as it transformed from bulk crystal to nanofilm. The ZnO-MgO-SnO2 multilayer model explained the changes in the energy band structure of the multilayer ETL, providing a theoretical foundation for continuously enhancing the photoelectric conversion efficiency of PSCs.
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ChemistrySelect
·
2025
·Vol. 10
·期 14
·e202406185
·
IF 2
Yuhao Wan,Xiaoli Yang,Hang Wu,Rui Hu,Zhengya Gan,Jianjun Ding,Yi Gong,Xingyou Tian,Junfeng Li
Graphical Multilayered Ag/C-xL films were constructed by vacuum-assisted filtration of AgNWs and SWCNTs. Ag/C-7L film presented the best shielding performance more than 70 dB in X-band. This excellent performance was attributed to the alternating stacked AgNWs/SWCNTs structure, which not only enhanced multiple absorption and reflection, but also effectively avoided the oxidation of inner AgNW layer. In the face of the increasingly polluted electromagnetic environment, materials with efficient absorption of electromagnetic waves have been paid more and more attention. The structure regulation of electromagnetic interference (EMI) shielding materials with could enhance their EMI performance. In this work, multilayered single-walled carbon nanotubes (SWCNTs)/silver nanowires (AgNWs) composite film was fabricated via a facile vacuum-assisted filtration. With the increasing number of layers from 3 to 7, 7-layered composite film with introduced inner pores and gaps exhibited an excellent shielding performance more than 70 dB in X-band. This excellent performance is attributed to the alternately stacked and porous AgNWs/SWCNTs structure, which effectively constructed the interboundary polarization of AgNWs/SWCNTs and provided space to enhance multiple absorption and reflection, thus greatly improving the material's ability to absorb electromagnetic waves. In addition, the EMI SE T value of Ag/C-7L films in the X-band decreases by an average of only 4% after 1000 bends, 15% at 100% humidity and 100 °C, and 10% at −196 °C, which has excellent mechanical properties and stability. In this study, multilayer Ag/C-xL films show great potential in applications such as wearable materials, EMI protection in complex working environments, and green shielding.
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IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Luoxin Li,Wei Xiao,Lianjie Lu,Luntao Xia,Chenhe Shao,Yong Huang,Xin Liu,Zhenjin Xu,Qibin Zhuang,Zhengmao Ding,Dezhi Wu
Real-time monitoring of bearing operational status is critical for mechanical equipment safety. However, integrated temperature-strain sensors often encounter crosstalk between signals, which affects the accuracy and stability of measurements. Achieving precise in-situ monitoring of bearing temperature and strain conditions remains a significant technical challenge. Here, highly linear and stable AgNPs thin-film temperature sensors (AgNPs TFTSs) and AgNPs microcrack thin-film strain gauges (AgNPs MTFSGs) are proposed using laser-assisted printing technology, which are capable of accurately acquiring condition parameters of bearing. The printed AgNPs TFTS exhibited a low hysteresis error of 2.6 % and a high linearity of 0.999. The microcracks in AgNPs MTFSG were induced by ultraviolet (UV) laser, yielding a significant enhancement of the gauge factor (GF) from 1.03 (baseline) to 3.19. This twofold sensitivity improvement was achieved while maintaining excellent linearity (R²=0.997). In particular, these thin-film sensors exhibited good stability even when applied to bearings. Typically, AgNPs TFTS and AgNPs MTFSG maintained a low resistance drift rate of 0.012 %/h and a repeatability error of 2.1 % respectively, demonstrating broad adaptability. In addition, both AgNPs TFTS and AgNPs MTFSG exhibited excellent dynamic and static response characteristics. This provides a method for the direct in-situ fabrication of thin-film sensors with high linearity and high stability on mechanical components, such as gears, bolts, and so on.
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Plant Nano Biology
·
2025
·
IF 7.7
Daoguo Chen,Xiaohan Guo,Nan Lu,Jiaojiao Zhang,Wenjun Ma,Junhui Wang
Silver nanoparticles (AgNPs) are known for their broad-spectrum antimicrobial activity and offer distinct advantages as antimicrobial agents, including high efficacy and low tendency for resistance development. However, the mechanisms by which AgNPs inhibit plant fungal pathogens remain unclear, particularly in anthracnose caused by Colletotrichum gloeosporioides . Therefore, it is essential to elucidate the antifungal mechanisms of AgNPs against this pathogen. In this study, we demonstrated that AgNPs effectively inhibit mycelial growth and spore germination of C. gloeosporioides at concentrations of 5 mg L −1 and 20 mg L −1 . Mechanistic investigations revealed that AgNPs suppress the expression of genes related to reactive oxygen species (ROS) scavenging and cell wall integrity, rather than causing disruption of cell membrane integrity. Furthermore, AgNPs treatment significantly reduced anthracnose disease severity in Catalpa bungei leaves. Additional results indicated that AgNPs may enhance ROS burst in C. bungei by up-regulating the expression of RBOH genes, which in turn promote the expression of pathogenesis-related (PR) protein genes. Collectively, these findings clarify the potential mechanisms of AgNPs antifungal activity and provide a theoretical basis for their practical application in the management of anthracnose, as well as for resistance breeding in forestry timber species.
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CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Jingdan Lei,Chunhui Wang,Xiaoyun Yang,Huijuan Geng,Xu-Jin Ge,Xinxin Wang,Shengqiang Cui,Yajing Wang,Gui Yang,Chao Wang
Recently, AgCuTe has garnered growing interest as a promising superionic conductor. Herein, we investigated the thermoelectric property changes induced by introducing SnTe into AgCuTe. The introduction of SnTe enabled a nearly 20% enhancement in the Seebeck coefficient. Combining with the relatively high electrical conductivity, a power factor of 9.3 μW cm–1 K–2 was achieved at 723 K. Particularly, by introducing SnTe into AgCuTe, multiple-scale defects including atomic-scale lattice disorder, nanoprecipitates, and micrometer-scale grain boundaries were constructed as an effective hierarchical phonon scattering mechanism. Owing to the scattering of full-wavelength phonons, we yielded a low lattice thermal conductivity of 0.2 W m–1 K–1, which approached the amorphous limits. Consequently, a maximum zT up to 1.1 was obtained at 723 K for AgCuTe–3 wt % SnTe, which was nearly 40% higher than that of pristine AgCuTe.
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LANGMUIR
·
2025
·
IF 3.9
Yanrui Wang,Ting Yu,Qing Xue,Le Chen,Yue Chen,Zhonghua Sun,Junfeng Qian,Chang Guo,Vladimir Yu. Guskov,Zhi-Hui Zhang
In this study, a Zn-based MOF was synthesized via a solvothermal method, and a series of AG/Zn-MOF-X composite aerogels were subsequently engineered through the controlled incorporation of agar. Comprehensive evaluation revealed that the AG/Zn-MOF-0.8 composite achieved remarkable removal efficiencies of 65, 61, and 100% for Cr2O72–, CrO42–, and MnO4–, respectively, outperforming pristine Zn-MOF by 14, 3, and 1%. An analysis of the kinetics and isotherms provided insights into the adsorption mechanisms. Notably, under photocatalytic conditions, the composite exhibited superior degradation with removal rates of 79, 86, and 100% for the respective oxyanions. These findings highlight that tailored MOF modifications can significantly boost both adsorption and photocatalytic performance, offering new possibilities for advanced water purification technologies.
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JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 10
·8561-8569
·
IF 2.5
Dong Tianhao,Cui Yongpeng,Wei Lianghuan,Zhu Shengjie,Si Jianxiao
CaM(M = Cu, Ag)Sb Zintl-phase compounds have ignited tremendous research activities due to their promising thermoelectric properties. In this work, a series of CaCu 1− x Ag x Sb (x = 0, 0.2, 0.4, 0.6, 0.7, 0.8, 0.9, 1) samples have been synthesized and investigated. The continuous structure transition from the hexagonal CaCuSb to the orthorhombic CaAgSb is characterized as the composition regulation on Cu/Ag ratios. Lattice bonding hardens and the electrical band structure changes as a result of this transition. The lattice thermal conductivity of CaCu 0.2 Ag 0.8 Sb, which benefitted from the structure transition, showed a minimum value of 1.05 W m −1 K −1 at 323 K. At the same time, the Seebeck coefficient was improved as a result of the rise in effective mass. The findings show that the CaMSb compounds have flexible structural tunability for thermoelectric applications if the hole concentration can be further optimized. Graphical
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Materials Today Communications
·
2025
·
IF 4.5
Kailiang Fang,Hongtao Wang,Zhuoming Xia,Chenyang Xiao,Erzhuo Jiang,Bo Duan,Guodong Li,Xuqiu Yang,Pengcheng Zhai
State-of-the-art thermoelectric devices require materials that combine excellent mechanical and thermoelectric properties, and the reinforcement by dispersion of nanoprecipitates is regarded as a promising solution. However, the process of introducing nanoprecipitates into materials usually involves complicated procedures. This paper presents a comparative analysis of high-pressure (HP), Spark Plasma Sintering (SPS), and melting (M) methods for preparing Ag 2 Te bulk samples. In particular, the HP method can introduce abundant nanoprecipitates at the grain boundary of Ag 2 Te bulk samples. The dispersion of nanoprecipitates significantly enhances the mechanical properties of the material, achieving an ultimate strength of 140 MPa and a fracture strain of 7.6 % through the mechanisms of crack deflection and particle pull-out. The strength and toughness of the sample improved by 57 % and 31 %, respectively, when compared to those prepared using the M method. When compared to the sample prepared using the SPS method, the improvements in strength and toughness are 13 % and 111 %, respectively. The energy filtering effect of the nanoprecipitates also improved the effective mass and Seebeck coefficient of the sample. In addition, the sample prepared by HP method exhibits higher carrier concentration due to minor Ag loss in the lattice at low temperature and without any applied current. Ultimately, in the temperature range of 300–405 K, the Ag 2 Te-HP sample has an average ZT value of 0.53, which is 110 % higher than that of Ag 2 Te-SPS sample and 200 % higher than that of the Ag 2 Te-M sample.
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Nature Communications
·
2025
·
IF 15.7
Wei Zhong,Haojie Zhao,Bowen Yao,Zhenze Li,Shuai Zhou,Zhifeng Wang,Yuhao Geng,Wen Sun,Jiajun Fu
Bionic electronics are designed to bridge the gap between biological systems and conventional electronic devices. However, replicating the high dynamic adaptivity and functional plasticity of living tissues while preserving the electrical performance and structural integrity of traditional electronics remains highly challenging, owing to the intrinsic trade-offs in molecular design. To address this issue, a methodology of reversible nanophase regulation is proposed, inspired by ion-specific effects in biological environments. Benefiting from the dynamic response of noncovalent interaction to specific ions, the developed system can successfully integrate multiple traditionally contradictory properties–combining outstanding electrical/mechanical performance with excellent reconfigurability, such as re-writability of conductive pathways, in-situ wet solderability with good spatial resolution, and closed-loop recyclability. This methodology offers a promising framework for designing reconfigurable devices for bioelectronics applications such as human-machine integration and tissue engineering. Man-made electronics often face trade-offs among biological-like plasticity, electrical performance, and structural integrity. The authors show that ion-specific effects in biology can be leveraged to create reconfigurable materials for bionic electronics.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Meili Yang,Zuzhe Kang,Xinpei Zhong,Sirui Bai,Dong-En Wang,Qin Tu,Sheng Chen,Jinyi Wang,Mao-Sen Yuan
Drug-induced acute kidney injury (DIAKI) is strongly associated with the accumulation of peroxynitrite (ONOO − ) and the depletion of glutathione (GSH), both of which contribute to increased morbidity and mortality. Owing to the lack of an effective method for the real-time monitoring of nephrotoxicity, it remains a diagnostic and therapeutic challenge and is considered a significant issue in clinical practice. Herein, a dual-site fluorescent chemosensor, BPS is developed , which enables the simultaneous real-time monitoring of ONOO − and GSH through distinct channels (ONOO − : λ ex = 410 nm, λ em = 548 nm; GSH: λ ex = 490 nm, λ em = 660 nm) without spectral crosstalk. The sensor displays remarkable sensitivity toward ONOO − and GSH, with low detection limits (181 n m and 2.42 µ m , respectively), exceptional specificity, and anti-interference effects. BPS is used to monitor ONOO − /GSH in real time to track the lesion of cisplatin-stimulated DIAKI and the following remedy process in mice and HK-2 cells for the first time. BPS provides a feasible tool for investigating oxidative stress-related DIAKI disease processes and further exploring some physiological mechanisms. Moreover, this study also offers a strategy for visualizing, modulating, and controlling the intracellular GSH/ONOO − redox.
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