Advanced Science
·
2025
·Vol. 12
·期 27
·2502832
·
IF 14.1
Kai-Yu Yang,Xiaoyuan Li,Yuanxin Jiang,Liangliang Wang,Kai Guo,Lei Miao,Junliang Chen,Jiye Zhang,Lin Li,Yusong Du,Guang-Hui Rao,Jun Luo,Jing-Tai Zhao
Segmentation is a widely adopted strategy to enhance the efficiency of medium- and high-temperature thermoelectric devices by capitalizing on the distinct properties of materials across various temperature ranges. Establishing a highly compatible matching relationship is crucial for maximizing conversion efficiency. In this study, the concepts of materials’ compatibility factor and relative current density into the screening process are emphasized for universal adaptability. The effectiveness and practicality of the theoretical model for optimal segmented combinations are validated through COMSOL finite element simulations and experimental results. A segmented thermoelectric power generation device is constructed that integrates the environmentally friendly n-type Mg 3 (Sb,Bi) 2 with the optimal segmented pairing of Bi 0.5 Sb 1.5 Te 3 -GeTe. Notably, at a temperature difference of Δ T = 440 K, this device achieves a maximum conversion efficiency of 10.4% and a peak output power of 0.41 W. These findings provide a solid theoretical foundation for the development of efficient combinations of thermoelectric materials.
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高影响因子
ACTA MATERIALIA
·
2025
·
IF 9.3
Ziming Zhang,Chen Ming,Qingfeng Song,Lei Wang,Hanbing Chen,Jincheng Liao,Chao Wang,Lidong Chen,Shengqiang Bai
Mg 3 (Sb,Bi) 2 -based Zintl compounds are rising stars with superior features of high thermoelectric (TE) performance, nontoxicity and low cost. However, the poor thermodynamic stability hinders its practical application. Here, we propose a design strategy of modulating the local chemical composition with grain boundary (GB) phase guided by computational phase equilibrium diagrams. By in-situ constructing ZrSb 1- x second phase in the GB regions of Mg 3 (Sb,Bi) 2 -based compounds, the migration of Mg is blocked and the Mg deletion is depressed. Benefit from these, the driving force of Mg diffusion from matrix to GB and Mg migration along GBs is weakened, resulting in an improved thermal stability without degradation of electrical transport properties. The fabricated 8-pair TE module using GB modulated n-type Mg 3.1 Sb 1.5 Bi 0.49 Te 0.01 and p-type Ge 0.89 Cu 0.06 Sb 0.08 Te presents an efficiency of 8.9 % under the temperature difference of 450 K and shows excellent durability in the thermal cycling test. This study provides an effective strategy to improve thermal stability by constructing GB phase, and proves the feasibility of the practical application for Mg 3 Sb 2 -based TE modules.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qingyang Jian,Yaru Gong,Chen Chen,Rongxin Sun,Song Zhao,Tao Shen,Qingtang Zhang,Yang Geng,Yanan Li,Wei Dou,Congmin Liang,Yuqi Liu,Deshang Xiang,Pan Ying,Guodong Tang
Cu2Se has emerged as a promising thermoelectric material due to its low lattice thermal conductivity, high Seebeck coefficient, and high peak figure of merit (ZT) at elevated temperatures. However, its performance is limited by a high intrinsic carrier concentration and low carrier mobility. In this work, we investigate Cu2Se-based composites to overcome these challenges by introducing GeTe as compound phase to optimize carrier concentration, enhance mobility, and promote phonon scattering. The incorporation of GeTe significantly optimized both carrier concentration and mobility, with the Cu2Se/5 wt % GeTe composite exhibiting a carrier mobility of 30.8 cm2·V–1·s–1, more than twice that of pristine Cu2Se (11.4 cm2·V–1·s–1). Additionally, the inclusion of GeTe substantially reduced both the electrical and lattice thermal conductivity across the entire temperature range. These improvements culminated in a peak ZT of 2.2 at 923 K for the Cu2Se/10 wt % GeTe composite. These findings underscore the effectiveness of utilizing high-performance thermoelectric materials, such as GeTe, as secondary phases to substantially boost the thermoelectric properties of Cu2Se. This approach offers a promising pathway for the development of advanced thermoelectric materials for energy conversion applications.
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JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Xue Jinxiong,Huang Jingping,Lin Xue,Pan Wuyuan,Ke Fang
MicroRNA-183-5p is a clinically relevant biomarker, yet its detection is hindered by short sequence length, high homology, and low abundance in complex biological fluids. We report a hydrothermally synthesized nickel chloride-decorated graphitic carbon nitride (NiCl 2 @g-C 3 N 4 ) with intrinsic peroxidase-like and fluorescence activities for label-free dual-mode detection. Characterized by multiple spectroscopic and microscopic techniques, the nanocomposite enables quantitative analysis via π-π stacking and van der Waals interactions between the probe and target, eliminating the need for enzymes or fluorescent labels. Under optimal conditions, using the formula LOD = 3Sb/b, the detection limit was calculated as 0.69. This material with broad linear ranges, excellent selectivity, month-long stability, and recovery rates of 97.7-101.6% in spiked serum. This facile and cost-effective platform offers a promising tool for sensitive miRNA quantification in clinical diagnostics.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 11
·e70403
·
IF 3.4
Wenming Yang,Xiangpeng Shi,Xiaoqiang Chen,Yuanzheng Cai,Yi Ji,Yunfei Cao,Wanzhen Xu
The presence of sulfonamide antibiotic residues, such as sulfadiazine (SDZ), in aquatic ecosystems presents significant ecological risks, including the emergence of antibiotic resistance. Therefore, the development of precise and sensitive detection methods is of paramount importance. This study focuses on the design of a highly sensitive sensor for detecting SDZ by exploring the effects of quantum dot (QD) emission wavelength, particle size, and surface characteristics on sensor performance. Green, yellow, and red-emitting cadmium telluride (CdTe) QDs were synthesized through systematic adjustments in the molar ratio of Cd 2+ to Te, reflux time, and solution pH. These QDs were subsequently incorporated into silica nanoparticles (NH 2 -SiO 2 ) via molecular imprinting technology to fabricate a multicolor fluorescent imprinted sensor. The results indicated that the sensor incorporating green-emitting QDs (MIPs@g-QDs@SiO 2 ) exhibited the best performance, with a detection limit of 10.53 nM, a fluorescence quenching constant of K Sv , g = 4030 M − 1 $$ {K}_{Sv,g}=4030\ {\mathrm{M}}^{-1} $$ , and a linear detection range of 10–60 μmol·L −1 . In comparison, the yellow and red-emitting QD sensors displayed higher detection limits of 30.58 and 68.52 nM, with quenching constants of K Sv , y = 3700 M − 1 $$ {K}_{Sv,y}=3700\ {\mathrm{M}}^{-1} $$ and K Sv , r = 3360 M − 1 $$ {K}_{Sv,r}=3360\ {\mathrm{M}}^{-1} $$ , respectively. The sensitivity of the green-emitting QD sensor is attributed to its smaller particle size, which results in a larger specific surface area and enhanced surface effects, thereby increasing the fluorescence intensity range. Moreover, fluorescence quenching and selective adsorption experiments demonstrated that MIPs@g-QDs@SiO 2 exhibited excellent selective adsorption properties for SDZ, contributing to its enhanced fluorescent response.
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Results in Surfaces and Interfaces
·
2025
·
IF 4.4
Jiaqi Li,Yuhan Zhang,Tongke Wang,Xintong Ta,Yachao Zhang,Fanlei Kong,Bo Hu,Lun Zhao,Guangbo Che
A core-shell structured mesoporous ion-imprinted ratiometric fluorescent sensor (CdTe@SiO 2 @CDs-MIIPs) was constructed for the visual and quantitative detection of Cu 2+ . The sensor integrates red-emitting CdTe quantum dots as an internal reference and blue-emitting carbon dots as a responsive signal within a mesoporous imprinted layer, enabling ratiometric fluorescence detection with enhanced sensitivity, selectivity, and visual distinguishability. Under optimized conditions, the system exhibited a linear response in the 200–1000 nM range, with a detection limit of 54.53 nM and a rapid response time of 4 min. To eliminate reliance on bulky analytical instruments, a smartphone-assisted RGB analysis method was introduced, enabling direct image-based quantification of fluorescence signals. The RGB-derived results were consistent with those obtained using a fluorescence spectrophotometer, demonstrating the potential of this sensor platform for on-site, instrument-free monitoring of Cu 2+ in complex environments.
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PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Qinghua Peng,Yuexing Zhang,Wenlin Feng,Xiaozhan Yang,Jiahao Cheng
The concentration and type of surface-adsorbed oxygen are critical determinants of gas-sensing performance. Rhenium disulfide (ReS 2 ), a transition metal dichalcogenide (TMD) with a thickness-independent direct bandgap, has garnered considerable attention as a promising material for high-performance gas sensors due to its high carrier mobility and concentration. In this work, an improved rhenium-tellurium eutectic growth method for ReS 2 synthesis is proposed. Furthermore, the type and concentration of surface-adsorbed oxygen on the ReS 2 film were modulated through a combined approach of H 2 annealing and hydrogen peroxide (H 2 O 2 ) solution immersion. This surface modification strategy enabled the fabrication of an ReS 2 -based sensor exhibiting a low detection limit of 0.0219 ppm for hydrogen sulfide (H 2 S) and exceptional resistance to humidity interference, offering a novel route for the design of TMD-based gas sensors.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qing Fu,Manxia Wang,Jia Shu,Guangjun Xiao,Zhujun Ai,Xin Gao,Huan Cai,Yan Zhao,Xuhuai Fu,Zhizhong Li,Mengjie Zhang,Jinzhou Feng,Juan Li,Rui Chen
Neuromyelitis optica spectrum disorder (NMOSD) is a neurological disease with rapid progression that can lead to severe visual impairment and paralysis. Rapid diagnosis at presentation significantly improves its prognosis, but there is a lack of available point-of-care testing (POCT) methods. Herein, for the first time, a colorimetric-fluorescent bifunctional nanoparticles (CFNPs)-based bimode lateral-flow immunoassay (LFIA) was developed for rapid and sensitive on-site diagnosis of NMOSD biomarker (AQP4-IgG). We first developed a novel sonochemistry-assisted strategy for the ordered self-assembly of CdTe quantum dots (QDs) using metal-organic framework (MOF) and polydopamine (PDA) flexible scaffold modification to fabricate CdTe@ZIF-8@PDA. Through rational design, the synthesis efficiency and fluorescence intensity of CdTe@ZIF-8 were 15-times and 9.67-times higher than those of the traditional synthesis method, respectively, and the colorimetric signal brightness and stability were significantly improved. The limit of detection of the CdTe@ZIF-8@PDA-labelled LFIA for AQP4-IgG titer detection by naked-eye colorimetric and smartphone-based fluorescence signal were 1:1.56 and 1:0.78, which were comparable to those of the gold standard cell-based assay (CBA). The diagnostic specificity and sensitivity for 121 clinical samples were 100 % and 82.35 % (colorimetric), and 100 % and 80.39 % (fluorescent). Our work has demonstrated an innovative strategy for constructing CFNPs and NMOSD on-site diagnostic approach that can be used for POCT.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xinyang Zhang,Xiaoyu Yang,Yingjun Wei,Dewei Wang,Yuhong Chen
Aqueous zinc–manganese dioxide (Zn–MnO2) batteries hold great promises for large-scale energy storage but face several challenges, such as dendrite formation on the anode and structural instability of the cathode. Herein, we propose an aqueous tellurium–manganese dioxide (Te–MnO2) battery, which employs carbon-supported tellurium (C@Te) to replace the Zn metal anode coupled with vanadium-doped MnO2 (Mn1−xVxO2) cathode, as an alternative to overcome the intrinsic limitations of conventional Zn–MnO2 batteries. Notably, Mn1−xVxO2 can be produced through a room-temperature redox method, enabling effective V5+ ion doping in various α-, β-, γ-, and δ-MnO2 polymorphs. The resulting Mn1−xVxO2 exhibits enhanced structural stability due to the suppressed Jahn–Teller distortion and improved electronic conductivity resulting from V 3d/O 2p orbital hybridization. Consequently, the Mn1−xVxO2 cathode delivers a high specific capacity of 323.7 mAh g−1 at 0.1 A g−1 and 93.5% capacity retention after 1000 cycles at 0.5 A g−1, which significantly surpass those of the pristine MnO2 (P-MnO2). Mechanistic investigations and theoretical calculations further unveil a synergistic mechanism involving enhanced electron transport, optimized ion adsorption, and improved structural stability, demonstrating that V5+ doping promotes reversible H+/Zn2+ co-intercalation. Our study shows that Te–MnO2 batteries can offer a viable alternative to conventional Zn–MnO2 batteries and afford a universal synthesis strategy for Mn1−xVxO2.
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CRYSTENGCOMM
·
2025
·
IF 2.6
Jiahui Wang,Shufang Ma,Shuai Zhang,Xiaodong Hao,Bocang Qiu,Bingshe Xu
The discovery and construction of novel two-dimensional (2D) materials are driving forces for technological advancement. Among them, violet phosphorus (VP)—a structurally ordered and thermodynamically stable allotrope of phosphorus—exhibits a well-defined layered framework, superior crystallinity, and enhanced environmental stability compared with black phosphorus. However, the absence of an efficient and controllable growth strategy has severely constrained both its fundamental understanding and functional implementation. Herein, tellurium (Te) and iodine (I) were introduced as mineralizers in a chemical vapor transport (CVT) system to drive the transformation of amorphous red phosphorus into highly crystalline VP. This method enables rapid and uniform crystal growth, yielding plate-like VP with strong (004) orientation, sharp lattice fringes, and a remarkably high yield (~95%) within 15 h. The analysis of the structure and optical properties reveals significant light absorption activity, and it has a band gap of approximately 1.8 eV, indicating excellent semiconductor and light response characteristics. Furthermore, compared to black phosphorus the as-grown VP crystals exhibit robust air stability, maintaining their structural integrity and optical characteristics over extended periods. This work provides an efficient and scalable route to produce high-quality VP crystals, thereby advancing their applications in next-generation optoelectronics, photodetection, and energy conversion systems.
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