Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
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IF 16.6
Zhou Zhifang,Huang Yi,Wei Bin,Yang Yueyang,Yu Dehong,Zheng Yunpeng,He Dongsheng,Zhang Wenyu,Zou Mingchu,Lan Jin-Le,He Jiaqing,Nan Ce-Wen,Lin Yuan-Hua
Thermoelectric materials can realize direct conversion between heat and electricity, showing excellent potential for waste heat recovery. Cu 2 Se is a typical superionic conductor thermoelectric material having extraordinary ZT values, but its superionic feature causes poor service stability and low mobility. Here, we reported a fast preparation method of self-propagating high-temperature synthesis to realize in situ compositing of BiCuSeO and Cu 2 Se to optimize the service stability. Additionally, using the interface design by introducing graphene in these composites, the carrier mobility could be obviously enhanced, and the strong phonon scatterings could lead to lower lattice thermal conductivity. Ultimately, the Cu 2 Se-BiCuSeO-graphene composites presented excellent thermoelectric properties with a ZT max value of ~2.82 at 1000 K and a ZT ave value of ~1.73 from 473 K to 1000 K. This work provides a facile and effective strategy to largely improve the performance of Cu 2 Se-based thermoelectric materials, which could be further adopted in other thermoelectric systems.
研究领域:
材料科学
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热电材料
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能源材料
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiahui Li,Jie Gao,Lida Jia,Lei Miao,Sijing Zhu,Zhongwei Zhang,Chengyan Liu,Xiaoyang Wang
The solution-process method can be easily realized without expensive and complicated equipment, which provides the possibility for cost-effective application of flexible thermoelectric films. Nonetheless, the reported output properties of solution-processed Cu 2 Se based films are not satisfactory due to the absence of effective compositional adjustment and optimal length. In this work, a series of solution-processed nylon-supported flexible Cu 2+x Se films have been fabricated. The excess Cu not only fills the vacancies, but also transforms the β -Cu 2 Se with disordered Cu atoms into long-range ordered lamellar α -Cu 2 Se, thereby reducing the carrier concentration and improving the carrier mobility of the films. As a result, a high power factor of 856.59 ± 119.92 μW m −1 K −2 has been achieved in the Cu 2.20 Se film at 303 K. In addition, by numerical simulation, the ideal length of single Cu 2.20 Se film was calculated to be 2 mm. With an actual temperature difference of 6.6 K, a maximum output power density of 2.918 μW cm −2 K −2 , which is superior to those of other p-type flexible thermoelectric films, is realized in the single Cu 2.20 Se film. This work provides a feasible idea to promote the output performance of solution-processed flexible thermoelectric films.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zheng Tang,Chenxi Li,Chenyu Yan,Qian Zhang,Zhe Piao,Honggui Wang,Ya Zhang
Electrocatalytic carbon dioxide reduction reaction (eCO 2 RR) is one of the attractive approaches to CO 2 utilization. Nevertheless, it remains a challenge to prepare highly efficient and selective electrocatalysts to realize deep conversion of multi-carbon products. The absence of active sites due to the reconfiguration of copper-based catalysts leads to migration deactivation during catalysis, rendering low catalytic efficiency. In this work, Cu 2 Se nanowires (NWs) were obtained from the Cu foam. After further electroreduction for 90 s, Ag nanoparticles (NPs) were modified on the flower rod-shaped Cu 2 Se NWs (Ag 2.69% /Cu 2 Se NWs). This interfacial modification strategy, balanced the Cu δ+ active valence state on the surface of the Ag 2.69% /Cu 2 Se NWs, led to a high Faradaic efficiency (FE) of ethanol (∼70 %) at −0.52 V (vs. reversible hydrogen electrode (RHE)). Besides, the Ag 2.69% /Cu 2 Se NWs achieved a high partial current (∼13.9 mA) for ethanol, 18.5 μmol/h ethanol yield and an energy efficiency of 47.1 % in the H-type electrolytic cell. The reaction mechanism was investigated at the molecular level through density functional theory (DFT) calculation. The interface-modified Ag NPs provided stable *COOH intermediates during the reaction process, effectively achieving surface *CO enrichment. Besides, the presence of Ag NPs resulted in the generation of abundant Cu δ+ active species. The *CO migrated to the Cu δ+ active sites to accelerate the asymmetric coupling of *CO and *CHO, which significantly improved the FE of CO 2 electroreduction to ethanol. Our work offers a promising approach for designing Cu 2 Se-based nanowires electrocatalysts for CO 2 reduction with excellent activity and selectivity.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
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2024
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IF 10
Jia He,Wei Zhang,Yuyu Cui,Liang Cheng,Xu-Lin Chen,Xianwen Wang
Free radicals are secreted following skin damage and cause oxidative stress and inflammatory reactions that increase the difficulty of wound healing. In this study, copper-based nanozyme Cu 2 Se nanosheets (NSs) are synthesized by an anion-exchange strategy and apply to wounds with F127 hydrogels to investigate the healing effect of this nanozyme composite hydrogels on wounds. Cu 2 Se NSs have a large number of catalytically active centers, are simple to synthesize, require few reaction conditions and have a short synthesis cycle. In vitro experiments have shown that Cu 2 Se NSs possess superoxide dismutase (SOD)-like activity and nitrogen radical scavenging activity and promote angiogenesis and fibroblast migration. The doping of Cu 2 Se NSs into the F127 hydrogel does not have a significantly affect on the properties of the hydrogel. This hybridized hydrogel not only adapts to the irregular and complex morphology of acute wounds but also prolongs the duration of nanozyme action on the wound, thus promoting wound healing. Transcriptomic analysis further reveals the potential therapeutic mechanism of the Cu 2 Se/F127 hydrogel in promoting acute wound healing. Animal experiments have shown that the Cu 2 Se/F127 hydrogel has good biosafety. The Cu 2 Se/F127 hydrogel provides an innovative idea for the development of hydrogel dressings for the treatment of acute wounds.
研究领域:
材料科学
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生物医学工程
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伤口愈合
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纳米技术
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生物化学
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2015
·Vol. 2015
·期 13
·2229-2236
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IF 2.942
Long Zhang,Shulin Zhao,Yafei Li,Yaqian Lan,Min Han,Zhihui Dai,Jianchun Bao
Graphical Monoclinic Cu 2 Se nanocrystals and Cu 2 Se/Pd heterostructures have been synthesized by simple and facile methods. Owing to strong synergistic effects and phase-dependent characteristics, the surface-enhanced Raman scattering performance of the Cu 2 Se/Pd heterostructure is superior to those of Cu 2 Se, Pd, CuSe/Pd, and Cu 2– x Se/Pd. We have developed a simple and facile approach to the fabrication of monoclinic Cu 2 Se nanocrystals and Cu 2 Se/Pd heterostructures. [(C 2 H 5 ) 4 N] 2 [CuCl 4 ] was chosen as the copper source and SeO 2 /terpineol was used as the Se –II precursor for the generation of hexagonal CuSe and cubic Cu 2– x Se through the “hot-injection” and “one-pot” methods, respectively. Both CuSe and Cu 2– x Se could be further transformed into monoclinic Cu 2 Se through heat treatment with trioctylphosphine (TOP) at 220 °C. Cu 2 Se/Pd as well as CuSe/Pd and Cu 2– x Se/Pd were readily obtained by simply mixing copper selenides and Pd(NO 3 ) 2 in a 2-propanol solution. The Pd nanoparticles were distributed on the surface of the copper selenides. The effect of certain reaction parameters on the formation of copper selenides was studied. The amount of terpineol used played an important role in the phase-selective synthesis of CuSe and Cu 2– x Se. The surface-enhanced Raman scattering (SERS) performance of the heterostructures was investigated with 4-mercaptopyridine (4-Mpy) as a probe molecule. Owing to the strong synergistic effects between Cu 2 Se and Pd, Cu 2 Se/Pd showed greater SERS performance than pure Pd or Cu 2 Se. Moreover, compared to those of CuSe/Pd and Cu 2– x Se/Pd, Cu 2 Se/Pd exhibited the highest SERS sensitivity to 4-Mpy with a detection limit as low as 1.0 × 10 –9 M , which revealed its phase- and composition-dependent characteristics. This Cu 2 Se/Pd heterostructure exhibits potential applications in the chemical and biological sensing fields.
研究领域:
材料科学
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纳米技术
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分析化学
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化学传感
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产品关联
DOI
高影响因子
ACS Applied Bio Materials
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2020
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IF 0
Yuhuan Zhao,Xianwen Wang,Feng Gao,Chenya Wang,Zongjin Yang,Hanfei Wu,Chunyan Li,Liang Cheng,Rui Peng
The spread of antibiotic-resistance poses a great threat, making it a growing need to develop other antibacterial strategies and therapeutics. Recently, owing to their excellent physicochemical properties, copper chalcogenides have received extensive attention as photothermal agents. However, most reports are focused on Cu2–xS nanoparticles, whereas very few water-dispersible Cu2–xSe nanomaterials have been reported due to their difficult preparation process. Herein, water-dispersible and biocompatible cuprous selenide nanosheets (Cu2Se NSs) were synthesized by a simple anion exchange method starting from cuprous oxide nanorods (Cu2O NRs), which could also help avoid any environmental pollution caused by the organic solvent used during synthesis. The obtained Cu2Se NSs showed strong absorption in the second near-infrared window (NIR II) with a good photothermal conversion efficiency as high as ∼61.16%, outstanding among the previously reported NIR II photothermal agents. Interestingly, using Staphylococcus aureus and Escherichia coli as model pathogens, these Cu2Se NSs possess an intrinsic bacteriostatic effect and could inhibit the growth of both bacteria species. Furthermore, both the fluorescent-based microscopy and the bacterial morphology analysis using a scanning electron microscope have demonstrated that incubation of both species of bacteria with Cu2Se NSs under laser irradiation (1064 nm) would lead to complete disruption of the bacterial cell wall. Our work presents a facile method to prepare water-dispersible Cu2Se NSs-, which could serve as highly efficient dual-functional antibacterial agents.
研究领域:
材料科学
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生物医学
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微生物学
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产品关联
DOI
PubMed
Nanomaterials
·
2022
·Vol. 12
·期 4
·640
·
IF 5.719
Lin Bo,Fujin Li,Yangbo Hou,Min Zuo,Degang Zhao
Forming co-alloying solid solutions has long been considered as an effective strategy for improving thermoelectric performance. Herein, the dense Cu2−x(MnFeNi)xSe (x= 0–0.09) with intrinsically low thermal conductivity was prepared by a melting-ball milling-hot pressing process. The influences of nanostructure and compositional gradient on the microstructure and thermoelectric properties of Cu2Se were evaluated. It was found that the thermal conductivity decreased from 1.54 Wm−1K−1to 0.64 Wm−1K−1at 300 K via the phonon scattering mechanisms caused by atomic disorder and nano defects. The maximumzTvalue for the Cu1.91(MnFeNi)0.09Se sample was 1.08 at 750 K, which was about 27% higher than that of a pristine sample.Keywords:thermoelectric material;nanostructured;interfacial engineering;multi-scale scattering centers
研究领域:
材料科学
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热电学
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产品关联
DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2026
·Vol. 7
·期 10
·103575
·
IF 6.9
Qiren Jin,Chaofeng Wang,Zihan Tang,Bingqian Zu,Yingjie Liu,Liping Bao,Tao Ma,Song Chen,Huiju Wu,Liang Wu
The phase control aqueous-phase synthesis of CuSe and Cu 2 Se NPLs • CuSe NPLs show markedly better rate capability and cycling stability than Cu 2 Se NPLs • CuSe NPLs show only 0.012% capacity decay per cycle after 1,000 cycles at 10 A g −1 Summary Copper selenides are promising anode materials for sodium-ion batteries (SIBs), owing to high electronic conductivity, rich phase diversity, and large theoretical capacity. However, their phase-dependent sodium-storage performances remain insufficiently defined. Herein, we report a phase-controlled synthesis of CuSe and Cu 2 Se nanoplates (NPLs) to directly compare their phase-dependent electrochemical behavior. When evaluated as SIB anodes, CuSe NPLs demonstrate superior rate capability and cycling stability relative to Cu 2 Se NPLs, delivering a specific capacity of 368.8 mAh g −1 at 20 A g −1 and maintaining 337.4 mAh g −1 at 10 A g −1 after 1,000 cycles with a capacity decay of only 0.012% per cycle. Operando X-ray diffraction and electrochemical kinetic analyses reveal that sodium storage in CuSe is mediated by coupled diffusion-controlled and pseudocapacitive processes. Collectively, these findings confirm that crystal phase decisively governs sodium-storage chemistry and kinetics in copper selenides and offer guidance for high-performance conversion-type anodes for next-generation SIBs. Download: Download high-res image (189KB) Download: Download full-size image
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 12
·6701-6712
·
IF 14.511
Lanwei Li,Wenya Zhai,Chao Wang,Yanqun Chen,Shuyao Li,Pengya Fan,Zhenxiang Cheng,Gui Yang,Jianli Wang,Yanli Mao
Nanoengineering has always been an effective way to optimize thermoelectric materials. Multi-layered nanostructures can maximize the phonon scattering efficiency and greatly reduce the thermal conductivity, thus improving the thermoelectric performance. In this work, multi-layered nanostructures are constructed in AgCuTe by alloying Cu2Se, which strongly scatters full-wavelength phonons and achieves a new low thermal conductivity at 723 K. High-resolution transmission electron microscopy shows that additional phase boundaries, multiple Moiré fringes and regular nanophases are formed after alloying Cu2Se. Moiré fringes form high density dislocations and strong stress fields in AgCuTe, which can greatly scatter multi-wavelength phonons. In addition, the Cu+ ions generated after the dissolution of a small amount of Cu2Se participate in the electrical transport, which optimizes the electrical performance. In the end, the AgCuTe–1%Cu2Se sample achieves the lowest thermal conductivity of ∼0.45 W m−1 K−1 at 723 K, which is much lower than the average level of published AgCuTe-based materials. At the same time, between 523 K and 723 K, the average ZT ∼ 1.13 of AgCuTe–1%Cu2Se reached the leading level. This work provides a new strategy for further reducing the thermal conductivity of AgCuTe-based materials.
研究领域:
材料科学
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纳米技术
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热电学
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固体物理
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DOI
高影响因子
Sustainable Materials and Technologies
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2026
·
IF 9.7
Silu Shi,Jie Chen,Haotian Tan,Mengdi Wang,Xinyuan Zhang,Jing Wang,Xiao Yan,Ji Liang
The electrochemical ammonia oxidation reaction (AOR) offers a promising route for converting ammonia into value-added chemicals while enabling green hydrogen production. However, practical application is hindered by the high cost and limited stability of noble-metal catalysts. Herein, a selenium-vacancy-rich NiO/Cu 2 Se heterostructure (Se v –NiO/Cu 2 Se) is designed via solvothermal-calcination-selenization-annealing. The heterointerface modulates the electronic structure, while Sev activates lattice oxygen through Se O exchange to generate peroxy radical intermediates that facilitate AOR. In situ formed selenite anions suppress competitive OH − adsorption on Ni sites, inhibiting oxygen evolution. Consequently, Se v –NiO/Cu 2 Se achieves 10 mA cm −2 at 1.43 V and 96% nitrite selectivity at 1.6 V with over 96 h stability. When integrated with hydrogen evolution in a flow cell, the system enables simultaneous ammonia conversion (81% nitrite selectivity) and hydrogen production at 1.9 V, reducing cell voltage by 350 mV (at 20 mA cm −2 ) vs. conventional water splitting. This work demonstrates synergistic catalyst design via anion vacancies and heterojunctions for sustainable ammonia valorization and hydrogen production.
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·3305
·
IF 15.7
Ying Pan,Jian Qingyang,Gong Yaru,Song Tong,Yang Yuxuan,Geng Yang,Huang Junquan,Sun Rongxin,Chen Chen,Shen Tao,Li Yanan,Dou Wei,Liang Congmin,Liu Yuqi,Xiang Deshang,Feng Tao,Fei Xiaoyu,Zhang Yongsheng,Song Kun,Zhang Yang,Wu Haijun,Tang Guodong
Thermoelectric technology exhibits significant potential for power generation and electronic cooling. In this study, we report the achievement of exceptional thermoelectric performance and high plasticity in stable Cu 2 Se/SnSe composites. A novel matrix plainification strategy was employed to eliminate lattice vacancies within the Cu 2 Se matrix of the Cu 2 Se/SnSe composites, resulting in a marked improvement in carrier mobility and power factor. The presence of quasi-coherent interfaces induces phonon scattering, reducing lattice thermal conductivity without compromising carrier mobility. Consequently, a high figure of merit ( ZT ) of 3.3 was attained in the Cu 2 Se/5 wt.% Sn 0.96 Pb 0.01 Zn 0.03 Se composite. Additionally, the presence of high-density nanotwins imparts remarkable plasticity to the composite, yielding a compressive strain of 12%. The secondary phase contributes to the stability of the composite by hindering the extensive migration of Cu ions through bonding interactions. Our findings present a novel strategy for enhancing the thermoelectric performance of composite semiconductors, with potential applicability to other thermoelectric systems.
研究领域:
材料科学
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热电学
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复合材料
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固体物理
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
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2022
·
IF 6.959
Lin Bo,Ruipeng Zhang,Haoyu Zhao,Yangbo Hou,Xinglong Wang,Junliang Zhu,Linghao Zhao,Min Zuo,Degang Zhao
Co-alloying solid solution was regarded as a convenient approach to optimize the thermoelectric properties. In this study, the densified Cu2–x(MnFeNi)xSe1–yTey (x = 0–0.09; y = 0–0.03) designed by entropy engineering was prepared via microwave melting and hot-pressing sintering. The scattering mechanism and thermoelectric performance of Cu2Se were evaluated. Due to the regulation of the carrier concentration and structural stabilization of the β-phase, the electrical performance was significantly enhanced. Moreover, the infrared spectroscopy analysis and the decrease in sound velocity unambiguously demonstrated the existence of a lattice softening effect of bulk Cu2Se. By manipulating the lattice conductivity using entropy engineering, the thermal transport property gradually decreased (∼0.4 W m–1 K–1 at 300 K) due to the lattice softening effect and phonon scattering mechanism. The obtained zTmax was 1.37 at 750 K in the Cu2.91(MnFeNi)0.09Se0.99Te0.01 sample.
研究领域:
材料科学
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热电学
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固体物理
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纳米材料
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能量转换
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DOI
高影响因子
危险品化学品经营许可证（带存储）