ACS Applied Nano Materials
·
2022
·
IF 6.14
Wanying Lin,Biao Zhang,Jun Jiang,Enzuo Liu,Junwei Sha,Liying Ma
The design of transition metal dichalcogenides that satisfies the essential requirements of the hydrogen evolution reaction (HER) in alkaline solutions remains a challenge. The study gives a description of sulfur atoms into both anionic and cationic sites of WTe2, which is deliberately designed and has been rarely reported. Herein, we report 3D self-supported anionic and cationic S-substituted WTe2 nanosheet arrays constructed on a carbon cloth by a three-step synthesis method at elevated temperatures. Experimental and theoretical analysis are both executed to investigate S-WTe2/CC nanocomposites for efficient alkaline HER, and the results attest to its excellent electrocatalytic performance. The optimized S-WTe2/CC exhibits an enhanced HER activity with an overpotential of 195 mV at the current density of 10 mA cm–2, which is 2.3 and 1.7 times lower than that of WO3/CC (451 mV) and WTe2/CC (327 mV), respectively. According to density functional theory calculations, such improvement of alkaline HER is attributed to the optimized p-band electron configuration of Te atoms, higher H* intermediate adsorption, and lower H2O dissociation energy barrier by anionic and cationic co-substitution of S, which accelerate the Volmer–Heyrovsky process. The present study paves a way to the modification strategy of WTe2 electrocatalysts.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Tianbiao Zeng,Dong Feng,Qimeng Peng,Qi Liu,Guocui Xi,Gang Chen
Among the germanium-based compounds, GeTe is a promising anode candidate that exhibits high theoretical capacity (856 mAh g–1 vs Li+/Li and 401 mAh g–1 vs Na+/Na) and low volume expansion during an ion intercalation/deintercalation process. Nevertheless, achieving good dispersion of metal-like GeTe in anode materials remains a significant challenge. Herein, hybrid GeTe/graphene (GeTe/G) is proposed as a highly efficient anode for LiBs and SiBs by facile ball milling. Pulverized GeTe is effectively anchored on peeled graphene sheets that can accelerate Li+ transport in electrodes as predicted by theoretical calculations and thus result in improved overall electrochemical performance. For instance, GeTe/G possesses a high reversible capacity of 478 mAh g–1 under 0.1 A g–1 in the 300th cycle. Moreover, by further cross-linking the GeTe/G using carbon nanotube (CNT) and carbon nanofiber pyrolysis from cotton cellulose, the as-prepared three-dimensional (3D) flexible anode possesses macropores that acted as positive channels favorably for ion transport. Remarkably, the as-prepared flexible 3D GeTe/G/CNT electrode with a thickness of 1050 μm exhibits a high reversible capacity of 451.4 mAh g–1 (4.38 mAh cm–2) vs Li+/Li and 372.5 mAh g-1 (2.08 mAh cm-2) vs Na+/Na, respectively, in the second cycle under 0.1 A g–1. These results shed some light on the direct application of 3D flexible carbon sponge electrodes in high-performance LiBs/SiBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Lisha Fan,Jiyong Tang,Ling Wu,Shuowen Zhang,Fan Liu,Jianhua Yao,Lianbo Guo
Bismuth telluride, (Bi 2 Te 3 ), is of great scientific and technical importance due to its excellent thermoelectric performance near room temperature. However, deposition of Bi 2 Te 3 thin films suffers from composition deviation due to preferential loss of Te at a high-temperature deposition environment. We demonstrated a fast and efficient laser annealing method to synthesize high-quality stoichiometric Bi 2 Te 3 thin films at room temperature from Te/Bi stacking films. The production rate of Bi 2 Te 3 was around 180 times higher than conventional thermal annealing. The formation of Bi 2 Te 3 thin films was studied with respect to annealing laser energy density . Bi 2 Te 3 thin films with an Bi:Te atomic ratio of 2:3 were achieved at an annealing laser energy density of 6.6 mJ/cm 2 . The structural, chemical, and thermoelectric performance of laser-annealed films were compared with conventional thermally annealed films. The Seebeck coefficient of laser-annealed films reached −167 µV/K, which was1.3 higher than that of thermally annealed films, evidencing the superiority of the laser annealing method in producing high quality Bi 2 Te 3 stochiometric films. Rapid growth of stoichiometric Bi 2 Te 3 thin films by laser annealing holds great promise for the development of high-performance thermoelectric devices.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xin He,Rongfei Wei,Xiangling Tian,Jianrong Qiu,Mei Zhang,Qingguang Zeng,Junyan Liu
Te-Bi 2 Te 3 alloy thin film has grown on silicon dioxide substrate by thermal evaporation technique. The Bi 2 Te 3 rhombohedral structure enriched Te in the prepared thin film was identified by high solution transmission electron microscopy (HRTEM), X-Ray diffraction (XRD), Raman spectrum and X-ray photoelectron spectroscopy (XPS). Interestingly, the Te-Bi 2 Te 3 alloy thin film presents a changeover from saturable absorption (SA) to reverse saturable absorption (RSA) as continuously increasing the input intensity, which has been investigated using the open-aperture (OA) z-scan measurement under a femtosecond-pulsed laser at 800 nm. A high modulation depth of 48.3% and large saturation intensity of 24.1GW/cm 2 of the thin film were obtained. Moreover, a large nonlinear absorption coefficient β of ∼10 3 cm/GW is increased with the input intensity elevated. The research results demonstrate that the Te-Bi 2 Te 3 alloy thin film could be an emerging optical material for saturable absorber in Q-switched or mode-locking fiber lasers at low incident intensity while serve as optical limiter at high incident intensity.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
·
纳米材料
·
光电子学
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2018
·Vol. 5
·期 1
·1800548
·
IF 5.466
Changzeng Yan,Tianhang Yu,Chao Ji,Dae Joon Kang,Ning Wang,Rong Sun,Ching-Ping Wong
Ever-increasing packaging and power densities of modern electronic devices in the present “More-than-Moore” technology era demand higher performance thermal interface materials (TIMs). However, conventional composite TIMs require higher loading to achieve better thermal conductive property, resulting in a mechanical problem. The poor wetting property of matrix loading materials further increases the interfacial thermal resistance (ITR). In this work, a one-step hydrothermal method is employed to grow 2D molybdenum disulfide (MoS 2 ) nanosheets on a tellurium (Te) nanowire skeleton and silver (Ag) nanoparticles are further decorated on MoS 2 nanosheets via the photoreduction method. The in-plane thermal conductivity of the final nanocomposite reaches as high as 10.4 W m −1 K −1 , which is 4,160% higher than that of a pure epoxy resin and one order of magnitude higher than that of conventional polymeric nanocomposites. The 3D interconnected heat transferring network of Te/MoS 2 /Ag greatly enhances the thermal stability of the composite in practical applications. The rational materials design concept may contribute to the development of new types of high-performance thermal management materials.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
Energy & Environmental Science
·
2019
·Vol. 12
·期 6
·1918-1927
·
IF 33.25
Xuefeng Zhang,Shuqiang Jiao,Jiguo Tu,Wei-Li Song,Xiang Xiao,Shijie Li,Mingyong Wang,Haiping Lei,Donghua Tian,Haosen Chen,Daining Fang
For exploring promising energy storage devices beyond lithium ion batteries, aluminum ion batteries (AIBs) are desirable cells with high energy-to-price ratios because of abundant natural resources, the higher energy density of aluminum and elimination of unexpected safety risks. Nevertheless, an ideal rechargeable AIB configuration with ultrahigh capacity is still fundamentally pursued. For fundamentally promoting the most promising chalcogen or chalcogenide-based AIB positive electrode materials, here rechargeable tellurium (Te) nanowire positive electrodes are demonstrated to construct novel tellurium–aluminum batteries. The cell configuration allows Te nanowires for delivering an ultrahigh discharge capacity ∼1026 mA h g−1 (with a specific current of 0.5 A g−1) along with an initial 1.4 V discharge voltage, competitive with the record-setting energy density of the documented AIBs. For essentially tackling the dramatic capacity loss in tellurium positive electrodes, the mechanism of impacting the rechargeable ability is linked to the production of soluble tellurium chloroaluminate compounds upon both chemical dissolution and electrochemical conversion processes. As a consequence, the cell configuration is proved to substantially suppress the unexpected shuttle effects induced by soluble tellurium chloroaluminate compounds via employing reduced graphene oxide to support the tellurium positive electrodes as well as utilizing functionalized carbon nanotube membranes to modify the separators. The implication of the results suggests a nice plateau for massively promoting the rechargeable ability of AIBs, advancing remarkable routes for achieving ultrahigh capacity and energy density.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Tiantian Xiong,Xianwei Li,Zhiyong Ma,Kaiyi Liu,Yi Li,Chen Li,Fang Luo,Zehui Yang
The sluggish kinetics and inferior stability of oxygen electrocatalyst in rechargeable zinc air battery (ZAB) hamper its industrialization. In this work, we activate cobalt telluride (CoTe) by introduction of metallic cobalt (Co) to modulate the work function to facilitate the electron transfer from Co to CoTe during oxygen catalysis; additionally, the three-dimensional porous carbon nanosheets (3DPC) are invited to reduce the resistance towards electrolyte/oxygen diffusion. Thereby, Co-CoTe@3DPC only demands 280 mV overpotential to reach 10 mA cm −2 under alkaline oxygen evolution reaction (OER) condition, relatively lower than commercial iridium oxides (IrO 2 ); besides, the operando electrochemical impedance spectroscopy (EIS) indicates a better resistance towards surface reconstruction than Co@3DPC leading to a superior stability. A Pt-like oxygen reduction reaction (ORR) performance, half-wave potential associated with kinetic current density , is achieved for Co-CoTe@3DPC. A maximum power density of 203 mW cm −2 is achieved and sustains for 800 h. Furthermore, the all-solid-state ZAB offers 97 mW cm −2 . Theoretical calculation suggests that the incorporation of metallic Co to CoTe maintains the superb ORR activity and promotes the OER catalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lifeng Zhang,Yaoxin He,Jiaxi Bai,Fenghua Liu,Robert Bradley,Weiping Wu,Xingang Kong,Shouwu Guo
Addressing the slow electrochemical kinetics and electrode pulverization of sodium ion batteries (SIBs) is needed to continuously develop advanced anode materials . Molybdenum telluride (MoTe 2 ) is considered promising for SIBs anodes due to its wider interlayer distance , faster electronic conductivity , and weaker interlayer force. However, the nanoparticle aggregation and layered structure collapse caused by bond breakage weaken its inherent advantages for excellent sodium storage performance. Herein, hierarchically nanostructured regulation and surface coating of MoTe 2 based SIB anodes are simultaneously achieved by employing Mo-PDA as precursors through a concise and effective method containing chelation, preoxidation and tellurization. The microstructure and morphology of MoTe 2 /C composites can be facilely regulated by controlling the chelation time and tellurization temperature. The as-synthesized MoTe 2 /C-6h-600 electrode exhibits encouraging Na + storage performance, which delivers discharge capacitances of 290.7 mAh g −1 (0.1 A g −1 ) and 161.1 mAh g −1 (1.0 A g −1 ) after hundreds and thousands cycles, respevtively. Furthermore, the assembled full cell of MoTe 2 /C-6h-600//NVP delivers a stable reversible capacitance of 103 mAh g −1 , which is promising for future practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wu-Di Zhang,Xiao-Ye Ge,Kang-Kang Zhao,Qiang Zhang,Fu-Hu Cao,Xingyu Guo,Chuan-Ling Zhang
Tellurides are promising anode materials for lithium-ion batteries (LIBs) because of their high electronic conductivity and energy density. However, the slow kinetics and poor structural stability lead to decreased electrochemical performance. In this work, by utilizing the interface magnetization mechanism and assembly effect, high-performance CoTe 2 nanoparticles encapsulated hierarchical N -doped porous carbon nanofibers were rationally designed and prepared (ES-CoTe 2 @NC) via facile tellurization of one-dimensional (1D) ZIF-67 nanocube assemblies. Benefiting from the synergistic effects of the unique structure and component, the ES-CoTe 2 @NC anode exhibits a high reversible capacity of 1020 mAh/g at 0.1 A/g after 200 cycles, along with excellent long-term cycling stability, retaining a capacity of 780 mAh/g at 1 A g −1 after 500 cycles. Notably, the ES-CoTe 2 @NC anode retains a remarkable capacity of 502 mAh/g even after 1000 cycles at a high current density of 5 A g −1 , highlighting its exceptional cycling stability. Besides, the Full cell coupled with LiFePO 4 cathode delivers a high reversible capacity of 151.1 mAh g −1 at 0.1 A g −1 with stable cycling performance. The kinetics analysis reveals that the ES-CoTe 2 @NC anode has high pseudocapacitive properties, high electronic conductivity, and fast Li + diffusion capability. Moreover, the ex-situ characterization clarifies the conversion reaction mechanism of ES-CoTe 2 @NC. This work provides a facile but effective way to construct high-performance CoTe 2 -based electrodes.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Guowu Tang,Qi Qian,Xin Wen,Guanxiang Zhou,Xiaodong Chen,Min Sun,Dongdan Chen,Zhongmin Yang
For the first time to the best of our knowledge phosphate glass-clad optical fibers comprising tellurium (Te) semiconductor core have been fabricated using a molten core approach. The cores were found to be highly crystalline and phase-pure as evidenced by X-ray diffraction (XRD) and corroborated by Micro-Raman spectrum. Elemental analysis across the core/clad interface suggests that there is some diffusion of oxygen and phosphorus into the core region and, conversely, diffusion of Te into the cladding region. Unfortunately, the propagation loss of the Te core fibers was too high to measure due to the significant scattering from the grain boundaries, oxygen and phosphor precipitates. However, the larger Raman gain, infrared and terahertz transparency of tellurium over silicon and germanium should make these fibers of significant value for fiber-based mid- to long-wave infrared, terahertz waveguides and Raman-shifted infrared light sources.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2017
·
IF 8.402
Feng Li,Tianyu Li,Wei Cao,Lu Wang,Huaping Xu
Cisplatin (CDDP) has received worldwide approval for clinical use in the past decades. However, its development in cancer chemotherapy was overshadowed by severe side effects and drug resistance. Herein, we developed a CDDP drug delivery system with high encapsulation efficiency and near-infrared light stimuli-responsive drug release properties based on the coordination of novel tellurium-containing block polymer (PEG-PUTe-PEG) and CDDP. The nanocarriers made from PEG-PUTe-PEG were loaded with CDDP and indocyanine green (ICG) simultaneously. The coordination chemistry between CDDP and tellurium guaranteed the nanocarrier a high stability in plasma and prolonged circulation time in vivo by reducing possible penetration of water molecule into the nanoparticles . Under the stimuli of a near-infrared laser, an amount of ROS can be generated by irradiation of ICG. The tellurium is easily oxidized by ROS because of the low electronegativity of tellurium. The CDDP could be rapidly released from the nanocarriers along with the oxidation of the tellurium at the tumor sites as the oxidized tellurium will weaken the coordination interaction with CDDP. In addition, the encapsulated ICG played a synergistic antitumor effect through photothermal effect with mild laser irradiation . The integrated strategy achieved higher antitumor efficacy and showed minimal side effects compared with the CDDP alone.
研究领域:
生物医学工程
·
肿瘤学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Kun WANG,Er-Fei DONG,Min FANG,Ting CHEN,Wei-Ju ZHU,Cun LI
A new ratio fluorescence sensor based on mercaptamine capped cadmium telluride quantum dots (Mea-CdTe) and benzocoumarin-3-carboxylic acid (BTA) were constructed. The ratio fluorescence sensor (BTA@Mea-CdTe) was synthesized by amidation reaction between the amino groups on the surface of Mea-CdTe quantum dots and the carboxyl groups of BTA. It is found that Hg 2+ ions react with the amino groups on the surface of the quantum dots in the BTA@Mea-CdTe sensor to quench the fluorescence, but it has no effect on the fluorescence of grafted BTA. The sensor has good selectivity and high sensitivity for Hg 2+ ions detection. The detection linear range is 0.4–1.2 µM, and the detection limit is 0.03 µM. This ratio fluorescence sensor can be used for Hg 2+ visual recognition in water sample detection with obvious color change.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）