ELECTROANALYSIS
·
2020
·Vol. 33
·期 4
·947-955
·
IF 2.544
Yanqiu Fu,Jinrui Li,Wei Jin,Zhonggang Liu
In this work, a dual-functional electrochemical sensor has been proposed based on Sn-doped defective Bi 2 S 3 (TDDB) microspheres, which exhibited the excellent electrochemical performance on Pb(II) and H 2 O 2 detection. The TDDB offered a satisfied detection limit of 8.0 nM towards Pb(II) with a sensitivity of 96.7 μA ⋅ μM −1 . As a H 2 O 2 sensor, a high sensitivity of 3540 μA mM −1 cm −2 was obtained in a linear range from 0.45 mM to 10 mM with a detection limit of 10 nM. Moreover, the electrochemical detection of Pb(II) in Taihu Lake and H 2 O 2 in human serum was achieved with high reliability and good recovery.
研究领域:
分析化学
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环境科学
·
生物医学工程
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DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Yu Liu,Mingquan Li,Shanhong Wan,Khak Ho Lim,Yu Zhang,Mengyao Li,Junshan Li,Maria Ibáñez,Min Hong,Andreu Cabot
AgSbSe2 is a promising thermoelectric (TE) p-type material for applications in the middle-temperature range. AgSbSe2 is characterized by relatively low thermal conductivities and high Seebeck coefficients, but its main limitation is moderate electrical conductivity. Herein, we detail an efficient and scalable hot-injection synthesis route to produce AgSbSe2 nanocrystals (NCs). To increase the carrier concentration and improve the electrical conductivity, these NCs are doped with Sn2+ on Sb3+ sites. Upon processing, the Sn2+ chemical state is conserved using a reducing NaBH4 solution to displace the organic ligand and anneal the material under a forming gas flow. The TE properties of the dense materials obtained from the consolidation of the NCs using a hot pressing are then characterized. The presence of Sn2+ ions replacing Sb3+ significantly increases the charge carrier concentration and, consequently, the electrical conductivity. Opportunely, the measured Seebeck coefficient varied within a small range upon Sn doping. The excellent performance obtained when Sn2+ ions are prevented from oxidation is rationalized by modeling the system. Calculated band structures disclosed that Sn doping induces convergence of the AgSbSe2 valence bands, accounting for an enhanced electronic effective mass. The dramatically enhanced carrier transport leads to a maximized power factor for AgSb0.98Sn0.02Se2 of 0.63 mW m–1 K–2 at 640 K. Thermally, phonon scattering is significantly enhanced in the NC-based materials, yielding an ultralow thermal conductivity of 0.3 W mK–1 at 666 K. Overall, a record-high figure of merit (zT) is obtained at 666 K for AgSb0.98Sn0.02Se2 at zT = 1.37, well above the values obtained for undoped AgSbSe2, at zT = 0.58 and state-of-art Pb- and Te-free materials, which makes AgSb0.98Sn0.02Se2 an excellent p-type candidate for medium-temperature TE applications.
研究领域:
材料科学
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表面化学
·
热电材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 29
·1-10
·
IF 2.8
Guo Jiao,Zhang Yin,Zhang Yakun,Shu Rui,Zhang Wei,Chen Aimin,Liu Pengfei,Wang Yuanyuan
The increasing amount of dye wastewater presented significant environmental and public health concerns, underscoring the urgent need to develop an eco-friendly, cost-effective, and sustainable approach to wastewater treatment. Photocatalytic technology is an ideal candidate for wastewater treatment due to its low pollution, high efficiency, and easy operation. In this work, a series of Sn-doped MgIn 2 S 4 photocatalysts were successfully prepared via the hydrothermal method. The 60%Sn–MgIn 2 S 4 showed the best photocatalytic activity, with a degradation rate of 62.5% for methyl orange (MO) over a 60-min driven by visible light. 60%Sn–MgIn 2 S 4 exhibited ideal stability, retaining 85% of its original degradation rate after four cycles of testing. Electrochemical impedance spectroscopy suggested that the 60%Sn–MgIn 2 S 4 possessed the ideal photogenerated charge migration rates. In addition, the photocatalytic active species-capture experiments showed that · O 2 – and · OH were the main active species for the photocatalytic degradation of MO over 60%Sn–MgIn 2 S 4 . This research provided a significant foundation for the development of MgIn 2 S 4 -based photocatalytic materials.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 22
·期 2
·248-256
·
IF 3.382
Xiuxia Wang,Chengyan Liu,Junliang Chen,Lei Miao,Shaohai Wu,Xiaoyang Wang,Zhengchuan Xie,Wenjing Xu,Qiufeng Chen
Recently, Ag8SnSe6-based materials, belonging to the family of argyrodite compounds, have been considered as promising thermoelectric candidates due to their intrinsically ultralow lattice thermal conductivity. However, their thermoelectric properties have been rarely investigated because of the intrinsic low carrier concentration. In this work, polycrystalline Ag8SnSe6 bulk materials were successfully synthesized by a bottom-up method by using hydrothermally synthesized Ag8SnSe6 nanocrystals as the precursors. The carrier concentration and mobility of Ag8SnSe6 are successfully enhanced by introducing additional Sn, which should manipulate the self-defects and improve the crystallinity. Thanks to the synergistic optimization of crystal and composition engineering, a maximum ZT value of about 1.22 is achieved for Ag8Sn1.005Se6 at 715 K, which is about 11% higher than that of the pristine sample, and the average ZT is also improved from about 0.65 to about 0.87. This study indicates that crystal engineering and composition engineering play an important role in the thermoelectric properties of Ag8SnSe6 and may provide guidance to improve the thermoelectric performance of other argyrodite compounds.
研究领域:
材料科学
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热电材料
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiaoman Li,Xinyu Liu,Pengfei Zhai,Ruijin Fan,Rongfei Wei,Hai Guo
The demand for white-light luminescent materials for the white-light-emitting diodes (W-LEDs) field has been growing in modern life. In this work, a series of Sn 2+ and Mn 2+ ions co-doped highly transparent white-light emitting oxyfluoride glasses (precursor glass, PG) and Sr 2 LuF 7 glass-ceramics (GC) were successfully prepared by the melt-quenching technique. Their luminescent and structural properties were investigated by the transmission spectra, excitation and emission spectra at different temperatures (300-500 K), luminescent decay curves, XRD, and TEM characterizations. Upon excitation with ultraviolet (UV) light, tunable broadband blue-white light emissions of Sn 2+ were obtained by adjusting the concentration of Sn 2+ ions. A conspicuous energy transfer process from Sn 2+ to Mn 2+ was observed in Sn 2+ /Mn 2+ co-doped samples. Tunable broadband luminescence between blue-white light and orange-red light regions and nearly pink-white light emission was realized by varying Mn 2+ concentration. Furthermore, compared to PG samples, the emissions were enhanced in GC samples due to the crystallization of Sr 2 LuF 7 nanocrystals. Excellent thermal stability was also performed in these Sn 2+ doped PG and GC samples with a recovering value of 96 % and 98.8 %, respectively. Simultaneously, Sn 2+ doped PG and GC samples also own good optical thermal sensitivities with an S A value of 2.28 % and 2.47 % K - 1 , respectively. Our results indicate that these Sn 2+ /Mn 2+ co-doped PG and GC may serve as tunable light sources under UV excitation and have prospects on the ratiometric optical thermometry fields.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Chuande Huang,Yanyan Zhu,Xiaodong Wang,Xin Liu,Junhu Wang,Tao Zhang
A series of BaFe 1− x Sn x O 3− δ catalysts were prepared by sol-gel method and tested for N 2 O decomposition to shed light on the effect of B-site substitution on the catalytic behavior of perovskite catalysts. 119 Sn and 57 Fe Mössbauer results confirmed that the 5-fold coordinated Fe 3+ cations with one adjacent oxygen vacancy (Fe 3+ O 5 ) were the main active centers for N 2 O decomposition. Doping of Sn cations can significantly improve the percentage of Fe 3+ O 5 from 30% ( x = 0) to 68% ( x = 0.8). More importantly, the valence state of Fe could be gradually reduced due to weakening of Fe O bond with increasing the Sn content, which was attributed to the stronger force of Sn than Fe in Fe O Sn structure to draw the oxygen anion and expansion of unit cell volume. Such change of Fe chemical state favored the oxygen mobility of the catalyst, leading to reduction in activation energy for N 2 O decomposition from ca. 241 ( x = 0) to 178 kJ mol −1 ( x = 0.8). BaFe 0.2 Sn 0.8 O 3− δ catalyst exhibited the highest intrinsic rate of 1.49 s −1 (550 °C), nearly 4 times larger than that of BaFeO 3− δ (0.43 s −1 ).
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 47
·19086-19093
·
IF 5.7
Xiaowei Zhu,Wei Liu,Guobin Zhu,Siyu Xiong,Deqin Chen,Xiuyun Lei,Laijun Liu,Chunchun Li
The present study reports on entropy-engineered perovskite ceramics (Ca1/3Sr1/3Ba1/3)(SnxTi1−x)O3 (CSBTO-xSn) with varying Sn-doping levels (x = 0.1, 0.2, 0.3), achieved through synergistic compositional design in both the A-sites and B-sites of the perovskite. Increasing the Sn-doping content induces a transition in configuration entropy from medium to high values. Notably, at an optimal composition of x = 0.1, the ceramic exhibits exceptional energy storage characteristics including an ultrahigh recoverable energy density (Wrec) of 5.05 J cm−3 and a high efficiency (η) of 82.56% at an electric field strength (Eb) of 540 kV cm−1 over a wide temperature range spanning from 30 to 100 °C and frequencies ranging from 1 Hz to 200 Hz. Furthermore, this ceramic demonstrates remarkable charge–discharge properties with a discharge energy density (Wdis) of 2.94 J cm−3 and a rapid discharge rate of t0.9 ∼ 67 ns. This study underscores the effectiveness of entropy engineering as a viable approach for developing advanced energy storage capacitors.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2015
·Vol. 17
·期 7
·1-7
·
IF 2.184
Wu Yimin,Qiao Xvsheng,Fan Xianping,Zhang Xianghua,Cui Shuo,Wan Jun
In this study, large-scale synthesis of Cu 3 SbSe 4 and Cu 3 Sb 0.98 Sn 0.02 Se 4 nanoparticles with a narrow size distribution was achieved through a rapid-injection route. These nanoparticles showed a monodisperse and quasi-spherical morphology. The Cu 3 SbSe 4 and Cu 3 Sb 0.98 Sn 0.02 Se 4 nanoparticle-based bulk materials were then prepared by hot-pressed sinter of the nanoparticles, and their thermoelectric performances were systematically studied. Due to the reduced lattice thermal conductivity from enhanced phonon scattering at the grain interfaces of the bulk materials, the maximum ZT value of the Cu 3 Sb 0.98 Sn 0.02 Se 4 bulk materials reached 0.50 at 575 K.
研究领域:
材料科学
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纳米技术
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热电材料
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DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Hongxiang Wu,Yibo Wang,Zhaoping Shi,Dongchen Han,Jiahao Yang,Pengbo Wang,Jing Ni,Meiling Xiao,Changpeng Liu,Wei Xing
The successful deployment of proton-exchange membrane water electrolyzers (PEMWEs) relies on the development of an active and durable electrocatalyst for the anodic oxygen evolution reaction (OER). Although rutile IrO2 shows excellent durability due to its stable crystal structure, it suffers from unsatisfactory activity. Here, we report a partial Sn substitution strategy to trigger lattice oxygen reactivity toward boosted OER. The similar crystal structures of IrO2 and SnO2 promote uniform incorporation of Sn into the lattice of IrO2, thus retaining the durability of the pristine rutile phase. More importantly, the electron transfer from Ir to Sn through the local structure of Ir–O–Sn was found to enhance the Ir–O bond covalency, which in turn activated the lattice oxygen to participate in OER. The enhanced lattice oxygen mechanism (LOM) was further verified by in situ 18O isotope labeling in situ differential electrochemical mass spectroscopy (DEMS). Due to these attributes, the as-designed Ir0.83Sn0.17O2 catalyst showed significantly improved performance, with an overpotential of only 284 mV at a current density of 10 mA cm–2, 38 mV lower than that of the commercial IrO2. In addition, the mass activity of the Ir0.83Sn0.17O2 catalyst reaches as high as 130 A gIr–1 at 1.55 V, which is 2.58 times higher than that of commercial IrO2. Beyond that, the intrinsic stability of the rutile phase endows the Ir0.83Sn0.17O2 catalyst with excellent operational durability. This work provides a novel insight into the improvement of catalyst activity and inspires the design of highly active and stable OER catalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 18
·185001
·
IF 3.4
Guohua Wu,Zhong Yu,Rongdi Guo,Zhiguang Wang,Hong Wang,Zhongqiang Hu,Ming Liu
To achieve compact and lightweight power conversion devices, magnetic core materials such as MnZn ferrite are highly desired with low core losses at high frequencies above megahertz. In this work, high-valent Sn4+ ions were doped into MnZn ferrite to manipulate the electromagnetic properties and suppress the high-frequency core losses. The distribution of Sn4+ in MnZn ferrite was investigated by transmission electron microscopy with energy dispersive x-ray analysis, which indicated that most of the substituted Sn4+ ions remained at the grain boundaries rather than dissolving into the lattice, and thus greatly impacted the electromagnetic properties of MnZn ferrite. The initial permeability and saturation induction decreased monotonically with the Sn substitution. The core loss was reduced to 457 kW m−3 at 3 MHz, 30 mT, and 25 °C when the Sn substitution content was 0.003, due to the effective suppression of eddy current loss and residual loss. The sample with a Sn content of 0.003 exhibited excellent overall electromagnetic properties, which could be potentially useful in high-frequency transformers, converters, and power sources.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Junsheng Wen,Boyan Fu,Leyao Bi,Jiahui Lin,Jiaxing Fu,Wenyue Tian,Chunjie Wang,Yue Wang
Recently, the monitoring of TEA has garnered significant attention, particularly concerning food safety, which could potentially lead to health risks. However, current studies on the detection of TEA using tungsten trioxide (WO 3 ) materials are suboptimal and require the exploration of effective WO 3 -based sensitive materials. This work employs a one-step solvothermal method to synthesize Sn-doped WO 3 materials with varying ratios and analyzes their selectivity and sensitivity to gases. The physicochemical properties of materials were characterized using multiple techniques including XRD, SEM, XPS, BET and Raman spectroscopy. The high response to TEA gas is successfully achieved by adjusting the doping amount of Sn 4+ (∼12 wt%). Qualitative analyses indicate that 10 wt% Sn-WO 3 exhibits superior response to TEA in all samples, showcasing a response of 94.5 at 175 °C for 100 ppm TEA, which is 5.7 times higher than that of WO 3 . Also, the related mechanisms were studied in detail. The low-intensity ratio of the (002) facet, small particle size, large specific surface area, and high concentration of oxygen vacancy defects resulting from Sn 4+ doping play pivotal roles in enhancing the response to TEA. It is expected that this work will contribute to advancements in WO 3 -based materials in the field of gas sensing.
研究领域:
材料科学
·
化学
·
环境监测
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产品关联
DOI
高影响因子
Frontiers in Materials
·
2022
·
IF 3.985
Liang Hong,Fu Gaosheng,Liu Jinrui,Tang Yueting,Wang Yujue,Chen Shan,Zhang Yanjie,Zhang Chen
Recent developments in 3D printing technology have been applied in the field of tissue engineering to fabricate customized bone repair scaffolds. β-tricalcium phosphate (β-TCP) is a bioceramic material with excellent potential as a scaffold foundation. Doping metallic ions with β-TCP will significantly enhance the mechanical property and bone regeneration performance compared with pure β-TCP specimens. In this study, we proposed a protocol for the fabrication of a Sn-doped β-TCP (Sn@TCP) scaffold using 3D printing technology, and the effect of Sn-doping on the physicochemical properties of the material and its in vitro bioactivity were investigated. Polyethylene glycol and polyvinyl alcohol were used as binder to construct Sn@TCP scaffolds which have good biocompability and can break down into H2O and CO2 after scaffolds sintering. The appearance of the scaffold constructed by 3D printing technology closely matched the computer design. The incorporation of Sn into β-TCP improved the compressive strength of the scaffold. Moreover, the Sn@TCP scaffold retained the inherently good biocompatibility of β-TCP and exhibited better osteoinduction capability than pure β-TCP scaffolds. Notably, the osteoinduction ability of Sn@TCP scaffolds were dependent on the Sn content. In conclusion, the 3D printing of Sn@TCP scaffolds with enhanced mechanical properties and osteoblast-inducing activity show great promise as scaffold materials in bone tissue engineering applications.
研究领域:
生物材料学
·
组织工程学
·
医学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）