Nanomaterials
·
2024
·Vol. 14
·期 5
·437
·
IF 4.4
Yanjun Xing,Zhiqiang Deng,Qiuxiang Wang,Jiaxing Xiong,Xiaohui Liu,Like Huang,Yuejin Zhu,Jing Zhang
The poor film stability of Sn-Pb mixed perovskite film and the mismatched interface energy levels pose significant challenges in enhancing the efficiency of tin–lead (Sn-Pb) mixed perovskite solar cells. In this study, polyvinylpyrrolidone (PVP) is introduced into the PVK perovskite precursor solution, effectively enhancing the overall stability of the film. This improvement is achieved through the formation of robust coordination bonds between the carbonyl (C=O) in the pyrrole ring and the undercoordinated SnIIand PbII, thereby facilitating the passivation of defects. Furthermore, the introduction of PVP inhibits the oxidation of tin (Sn), thereby enhancing the n-type characteristics of the perovskite film. This adjustment in the energy level of the PVK perovskite film proves instrumental in reducing interface energy loss, subsequently improving interface charge transfer and mitigating device recombination. Consequently, perovskite solar cells incorporating PVP achieve an outstanding champion power conversion efficiency (PCE) of 21.31%.
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Advanced Science
·
2024
·Vol. 11
·期 28
·2401436
·
IF 14.3
Yihan Wang,Lang Chu,Si Meng,Mingxuan Yang,Yidan Yu,Xiaokang Deng,Cheng Qi,Tiantian Kong,Zhou Liu
Yarn-woven triboelectric nanogenerators (TENGs) have greatly advanced wearable sensor technology, but their limited sensitivity and stability hinder broad adoption. To address these limitations, Poly(VDF-TrFE) and P(olyadiohexylenediamine (PA66)-based nanofibers coaxial yarns (NCYs) combining coaxial conjugated electrospinning and online conductive adhesive coating are developed. The integration of these NCYs led to enhanced TENGs (NCY-TENGs), notable for their flexibility, stretchability, and improved sensitivity, which is ideal for capturing body motion signals. One significant application of this technology is the fabrication of smart insoles from NCY-TENG plain-woven fabrics. These insoles are highly sensitive and possess antibacterial, breathable, and washable properties, making them ideal for real-time gait monitoring in patients with diabetic foot conditions. The NCY-TENGs and their derivatives show immense potential for a variety of wearable electronic devices, representing a considerable advancement in the field of wearable sensors.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Kangwang Wang,Longfu Li,Peifeng Yu,Nannan Tang,Lingyong Zeng,Kuan Li,Chao Zhang,Rui Chen,Zaichen Xiang,Huichao Wang,Yongqing Cai,Kai Yan,Huixia Luo
Topological semimetals with protected surface states mark a new paradigm of research beyond the early landmarks of band-structure engineering, allowing fabrication of efficient catalyst to harness the rich metallic surface states to activate specific chemical processes. Herein, we demonstrate a facile solid-phase method for in-situ doping of Ir at the Os sites in the Os 3 Sn 7 , an alloy with topological states, which significantly improves the photocatalytic performance for the reduction of CO 2 to CO and CH 4 . Experimental evidence combined with theoretical calculations reveal that the nontrivial topological surface states greatly accelerate charge-separation/electron-enrichment and adsorption/activation of CO 2 molecules, rendering highly efficient reaction channels to stimulate the formation of *COOH and *CO, as well CHO*. This work shows the promise of achieving high photocatalytic performances with synthesizing topological catalysts and provides hints on the design of novel topological catalysts with superior photoactivity towards the CO 2 reduction reaction.
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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Jun Wu,Yuchen Miao,Xiaorong Qi,Liu Yang,Xu Wang,Fei Zheng,Feiyu Zhao,Zhenfu Zhao,Shareen Shafique,Houcheng Zhang,Ziyang Hu
The Sn–Pb mixed perovskite, renowned for its narrow band gap and exceptional photoelectric properties, has garnered significant attention in photodetection, particularly as a potential alternative to near-infrared materials. However, the photodetector often suffers from unfavorable energy band arrangements at the heterogeneous interface between the perovskite and the electrode, which seriously hinder the further improvement of device performance. Here, a broadband, high-performance photodetector based on the Sn–Pb mixed perovskite has been achieved through fine-tuning of the energy band alignment at the perovskite/electrode interface. The resultant photodetector demonstrates an impressive broadband response spanning 367 to 1200 nm. At 395 nm, it achieves remarkable metrics: an ultra-high responsivity of 1.2 × 103 A W−1 and an outstanding detectivity of 4.4 × 1013 Jones, accompanied by a fast rise/fall time of 2.4 ms/5.4 ms. In particular, the sub-bandgap states of the Sn–Pb mixed perovskite enable the photoresponse beyond the bandgap limit. At 1200 nm, its responsivity and detectivity reach leading levels of 24.73 A W−1 and 1.01 × 1012 Jones, respectively. Moreover, it exhibits exceptional flexibility, enduring over 500 bending cycles without encapsulation while maintaining a decent photoelectric response. These findings underscore the critical role of optimizing interface contact in realizing high-performance, broadband perovskite photodetectors.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xuechao Liu,Mao Chen,Chunyan Shi,Guoqi Liu,Hongxia Li,Hailong Wang,Bingbing Fan,Yongqiang Chen
In this work, polycrystalline cubic boron nitride (PcBN) carbide insert was prepared by a six-anvil high-pressure apparatus at 1500 °C and 5.5 GPa, integrated sintering with different alloy substrates of the Co content. This work studied the effects of different Co content in alloy substrates on phase composition, microstructure, and mechanical properties of the PcBN carbide insert. The result shows that the binder reacted with cBN particles to produce AlN, AlCo, TiB 2 , W 2 B, and Co 2 B. At the same time, transgranular fracture is wide spread in the sintered body. The flexural strength and hardness of the PcBN carbide insert first increase and then fall. When the alloy substrate is WC-11.5 wt% Co, the PcBN carbide insert shows excellent comprehensive performance, with the flexural strength and hardness reaching 1675.67 MPa and 4100.51 Hv, respectively. Through integrated sintering, Co in the alloy substrate diffused and reacted with the binder in the cBN network at the bonding interface, forming a transition area that significantly improves the bonding strength.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-11
·
IF 2.8
Mi Xiaona,Xu Jian,Yu Mingjie,Gao Yiming,Zhang Dewei,Zhang Qinfang
Ternary copper-based Cu 3 SbSe 4 compound has emerged as a promising thermoelectric material. However, its practical application is limited by relatively low thermoelectric performance, primarily due to inferior electrical properties. In this work, the Cu 3 SbSe 4 -based composites with incorporated 2D MXenes ( i.e. , Ti 3 C 2 T x ) were synthesized by combining mechanical alloying with spark plasma sintering technique. The introduction of 2D Ti 3 C 2 T x nanosheets significantly enhanced the Seebeck coefficient, which is ascribed to the energy-dependent carrier scattering. Resultantly, an optimized PF ~ 1.1 mWm −1 K −2 can be realized in the bulk composite with x = 1.5. All composite samples exhibited low thermal conductivity in high temperature, attributed to enhanced interfacial phonon scattering. As a result, the best ZT value of 0.59 at 623 K is obtained for the bulk Cu 3 Sb 0.98 Sn 0.02 Se 4 /1.5 vol % Ti 3 C 2 T x composite, which increases by 31% compared with that of the matrix. This study demonstrates that incorporation of 2D MXenes into ternary copper-based compounds is an effective strategy to enhance their TE performance.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jinyuan Dong,Silan Chen,Xiaotian Wang,Yuguang Mao,Xiaoxiao Jing,Zhixu Ouyang,Jiabao Ding,Jianjun Tian,Yujin Ji,Youyong Li,Wu-Jun Shi,Yang Han,Weifeng Zhang
Co3Sn2S2 (CSS) possesses robust surface states and high conductivity derived from Co atoms with Weyl points located only 60 meV above the Fermi level (Ef), revealing the probability of tuning the electronic band structure of CSS by doping with transition metal atoms. Here, Fe, Ni, and Cu atoms have been successfully incorporated into CSS, which turns out that the Fe0.1–CSS possesses better activity than CSS and IrO2 with an overpotential of 298 mV to reach the current density of 10 mA cm–2 and a Tafel slope of 358.3 mV dec–1 in 1 M KOH. The Fe0.1–CSS also shows better activity and stability than IrO2 as an anode for the anion exchange membrane water electrolyzer in 1 M KOH. Besides, the density functional theory results indicate that the band structure of CSS is adjusted by the incorporation of transition metal atoms, which is related to the regulation of Ef and thus the variation in electrolytic performance. Our findings provide a strategy to further engineer the activity of a topological semimetal, which provides a direction toward material design for catalysis and beyond.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Guanghao Sang,Xin Zhang,Wei Li,Yuqing Li,Yijiang Chen,Xilong Zhang,Huize Song,Yuntao Cui,Zhongshan Deng
With the increasing integration density of chips and the consequent rise in surface heat flux, there is a growing demand for thermal interface materials (TIMs) that combine high thermal conductivity and long-term reliability. In this work, CuGa2 microparticles were synthesized via melt atomization and subsequently incorporated into gallium-based liquid metal to fabricate composite TIMs. Experimental results demonstrate that when the CuGa2 mass fraction reaches 50%, the composite achieves a maximum thermal conductivity of 74.92 ± 1.04 W/(m·K), approximately 3 times higher than that of conventional gallium-based liquid metal. This enhancement is primarily attributed to metallic bonding at the interface between liquid gallium and the CuGa2 intermetallic compound, where free electrons serve as the dominant heat carriers across the interface. Furthermore, the addition of CuGa2 improves the coating ability of the TIM while reducing its fluidity, thereby reducing the risk of leakage. Long-term testing over 35 days revealed no compositional changes or segregation hardening, confirming the excellent stability of the composite. Overall, Ga/CuGa2 TIMs strengthened by metallic bonding present a promising solution for reliable heat dissipation in high heat flux applications.
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WASTE MANAGEMENT
·
2025
·
IF 7.1
Shun Dai,Shiyu Wang,Haochen Wang,Fengyin Zhou,Simin Xu,Yongxin Wu,Muya Cai,Xinyi Li,Shuaibo Gao,Wei Li,Bowen Deng,Dihua Wang,Huayi Yin
Current methods for recovering copper (Cu), lead (Pb) and tin (Sn) from photovoltaic (PV) solder ribbons usually completely dissolve or melt the solder ribbons and then recover each element, which are reagent-intensive and generate large amounts of secondary waste. Herein, we develop an environmentally sustainable method for recovering Cu, Pb and Sn from End-of-Life (EoL) PV solder ribbons. First, above 95 % of pure Cu is recovered in the acetic acid (HAc) and hydrogen peroxide mixture (H 2 O 2 ), by which the Pb-Sn coating is selectively dissolved and separated from the Cu substrate. Second, the small portion of dissolved Cu 2+ is separated by solvent extraction (e.g., Lix84-I) and then is recovered by the electrolysis with a recovery rate of 99 %. Third, the dissolved Pb is recovered by electrochemical deposition with a recovery rate of 99 %, and Sn is recovered as Sn/SnO 2 powders. The selective recovery relies on the core–shell structure of ribbons and the different dissolution rates of Cu, Pb and Sn in the HAc, and the use of the HAc instead of HCl and HNO 3 leads to a cleaner process. Overall, the green recovery of solder ribbons will contribute to resource conservation and the circular economy of the EoL photovoltaic modules (PVMs).
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Journal of Cleaner Production
·
2025
·
IF 10
Tao Jiang,Ming Cheng,Yujiao Wang,Shaoqiang Guo,Wentao Zhou,Yafei Wang
The selective removal of neutron-absorbing fission products from spent nuclear fuel is critical for enhancing neutron economy and enabling efficient recycling. In this work, we present a novel two-step dry reprocessing strategy that integrates NH 3 /HCl gas mixture treatment with liquid Sn extraction to achieve phase-selective separation of Sm, Nd, Ru, Rh, and Pd from simulated U 3 O 8 -based spent fuel. Thermodynamic analysis and experimental validation reveal that decomposition of NH 4 Cl at elevated temperatures serves as the generator of NH 3 /HCl gas mixture capable of selectively chlorinating Sm 2 O 3 and Nd 2 O 3 into soluble chlorides while reducing U 3 O 8 to UO 2 and converting RuO 2 , Rh 2 O 3 , and PdO to their metallic states (Ru, Rh, Pd). Subsequent dissolution tests in LiCl-KCl confirm that Sm and Nd are almost completely removed, with chlorination efficiencies of nearly 100%, while uranium loss can be minimized by controlling direct NH 4 Cl contact. The coupled liquid Sn extraction at 1173 K enabled the recoveries of metallic Rh, Rh, and Pd with a promising extraction efficiency. This integrated approach significantly simplifies the partitioning of key neutron poisons (Sm, Nd, Ru, Rh, Pd) compared to conventional aqueous or pyrochemical routes, reduces secondary waste, and preserves uranium in its UO 2 form.
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Biomaterials Advances
·
2025
·
IF 6
Xingjian Yan,Han Dong,Liyin Gao,Mengqi Liu,Chunxi Wang
Prostate cancer (PCa) is commonly considered a “cold tumor” due to its immunosuppressive microenvironment. Cold tumors are typically identified by the absence of T-cell infiltration within the tumor, while other immune populations and myeloid cells can be observed in these tumors. To achieve light-heat combined immunotherapy checkpoint inhibitor treatment for castration-resistant prostate cancer, we aimed to transforming “cold tumors” into “hot tumors”. We designed and synthesized a two-dimensional material, selenium-doped black phosphorus (BP), to enhance the photothermal conversion efficiency, and formed Se@BPNSs by liquid-phase exfoliation. To address the issue of enhanced permeability and retention effect, and to achieve efficient targeting, we coated the Se@BPNSs with RM-1 cell membrane derived from mouse prostate cancer cells. By injecting a certain dose of Se@BPNSs into the tumor and irradiating with a 808 nm laser, the Se@BPNSs converted light energy into heat to kill tumor cells at high temperatures while releasing antigens captured by dendritic cells. In addition, we combined the immunotherapy checkpoint inhibitor anti-PD1 to enhance the immune response and promote immune cell infiltration. The successful preparation of Se@BPNSs was verified through material characterization, cell-level and animal-level experiments, and the antitumor effect was meanwhile verified, which further provided guidance for prostate cancer treatment by photothermal synergistic immunotherapy.
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Materials
·
2025
·Vol. 18
·期 9
·2149
·
IF 3.2
Qingmeng Wang,Xiuli Wang,Xiaomin Cheng,Qianju Cheng,Yi Yang
In the fields of nuclear engineering and solar thermal utilization, low melting point alloys with excellent thermal conductivity and heat transfer performance have attracted extensive research as a new generation of heat transfer fluids, leading to many fundamental and important application issues. This study investigates the high-temperature corrosion behavior of Sn-50Bi-2Zn (wt.%) heat transfer alloy against 304 stainless steel (304), 310S heat-resistant steel (310S), and 20 carbon steel (20C) at 600 °C. Theoretical analysis, based on Fick’s diffusion law, and experimental measurements reveal significant differences in corrosion severity. After 473 h, 20 carbon steel exhibited the lowest corrosion layer thickness (0.07 mm), while 310S suffered the most severe corrosion (1.50 mm), exceeding 304SS (0.83 mm) by 81%. Diffusion coefficients derived from Sn penetration depths further quantified these trends: D310S = 2.51 × 10−7mm2/s (6.8 × higher than 304: 3.7 × 10−8mm2/s) and D20C = 2.87 × 10−10mm2/s (128 × lower than 304SS). XRF analysis confirmed the dissolution of steel components into the molten alloy, with Fe, Cr, and Ni content increasing to 0.382 wt.%, 0.417 wt.%, and 0.694 wt.%, respectively, after 480 h. These results underscore the critical role of Ni content in accelerating Sn/Zn diffusion and pore formation, providing actionable insights for material selection in high-temperature heat transfer systems.
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