ChemSusChem
·
2024
·
IF 7.5
Fangfang Ren,Hongjun Pan,Cheng Wang,Yukou Du
Graphical Two-dimensional hexagonal bismuth telluride (Bi 2 Te 3 ) nanosheet were successfully synthesized by a facile solvothermal method, and then coupled with Pd by a microwave-assisted ethylene glycol reduction method to obtain the Pd/Bi 2 Te 3 composite, which delivered superior catalytic performance for the electrooxidation of glycerol in alkaline medium. Designing high-performance anodic catalysts to drive glycerol oxidation reaction (GOR) is essential for advancing direct alcohol fuel cells. Coupling Pd with oxophilic materials is an effective strategy to enhance its intrinsic catalytic activity. In this study, we successfully synthesized Pd/Bi 2 Te 3 catalysts with tunable compositions, using Bi 2 Te 3 as a novel promoter, and applied them to the GOR for the first time. Electrocatalytic tests revealed that the activity of the Pd/Bi 2 Te 3 catalysts was closely linked to their compositions. Among these catalysts, the optimized Pd/Bi 2 Te 3 -20 % showed potential to replace the commercial Pd/C catalyst, exhibiting a peak current density 5.2 times higher than that of the benchmark Pd/C catalyst. Furthermore, improved catalytic stability and faster catalytic kinetics were observed for Pd/Bi 2 Te 3 -20 %. The synergistic effect between Pd and Bi 2 Te 3 is responsible for the high performance of the Pd/Bi 2 Te 3 -20 % catalyst.
研究领域:
材料科学
·
电化学
·
能源技术
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 34
·10598-10604
·
IF 6.641
Xukun Zhu,Aolin Li,Di Wu,Peng Zhu,Haiyan Xiang,Song Liu,Jian Sun,Fangping Ouyang,Yu Zhou,Xiang Xiong
Crystal phase-engineering of two-dimensional (2D) transition metal dichalcogenides (TMDs) shows remarkable potential for various electronic, optoelectronic and catalytic applications. Here, a few-layer 1T′–2H MoTe2 lateral homo-junction has been obtained by using a facile chemical vapor deposition (CVD) method. In this CVD growth process, the in-plane phase evolution of the MoTe2 film can be dynamically controlled via tuning the contact between the film and Te vapor. Moreover, a local large-scale reversible phase transition of MoTe2 film through heat treatment in a hydrogen atmosphere is reported. During this heat treatment, two types of phase transition from 1T′ to 2H are observed at 500 °C and 750 °C respectively. The mechanism of this reversible phase transition is analysed by first principles calculations. The fabricated 1T′–2H–1T′ homojunction devices demonstrate that the hole mobility of 2H-MoTe2 is comparable with the exfoliated samples. This work in dynamic phase control of MoTe2 provides a pathway to exploring structural transformation of 2D materials and manufacturing novel phase-change electronic devices.
研究领域:
材料科学
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物理化学
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电子工程
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DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Yingming Wang,Hongyuan Yang,Zhiwei Liu,Kui Yin,Zhaowu Wang,Hui Huang,Yang Liu,Zhenhui Kang,Ziliang Chen
It is of great interest to develop the novel transition metal-based electrocatalysts with high selectivity and activity for two electron oxygen reduction reaction (2e − ORR). Herein, the nickel ditelluride (NiTe 2 ) with layered structure was explored as the 2e − ORR electrocatalyst, which not only showed the highest 2e − selectivity more than 97%, but also delivered a slight activity decay after 5000 cycles in alkaline media. Moreover, when NiTe 2 was assembled as the electrocatalyst in H-type electrolyzer, the on-site yield of H 2 O 2 could reach up to 672 mmol h − 1 g − 1 under 0.45 V vs. RHE. Further in situ Raman spectra, theoretical calculation and post microstructural analysis synergistically unveiled that such a good 2e − ORR performance could be credited to the intrinsic layered crystal structure, the high compositional stability, as well as the electron modulation on the active site Ni atoms by neighboring Te atoms, leading to the exposure of active sites as well as the optimized adsorption free energy of Ni to –OOH. More inspiringly, such telluride electrocatalyst has also been demonstrated to exhibit high activity and selectivity towards 2e − ORR in neutral media.
研究领域:
材料科学
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电化学
·
催化科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 15
·e53719
·
IF 3
Liangjie Shi,Yong Jin,Long Bai,Xiang Shang,Yupeng Li,Rong Zhou
Polymer micelles have attracted much attention in the field of controlled drug release because of their excellent hydrophobic drug solubility and fewer drug side effects. However, insufficient sensitivity, insufficient dilution resistance, and ordinary therapeutic effect severely restrict the further development of current drug-loaded polymer micelles. Here, the ditelluride group was introduced for the first time into fluorinated Gemini amphiphilic polymer (FnH12DiTeFnH12) to fabricate polymeric micelles used for controlled release. Camptothecin (CPT) loaded in the FnH12DiTeFnH12 micelles can be rapidly released in a controlled manner through the cleavage of ditelluride bonds by mild H 2 O 2 and glutathione. Meanwhile, the synergism effect of the superhydrophobicity of the fluorocarbon chain and the special Gemini structure endows the drug-loaded polymer micelles with excellent stability and drug-loading content. Moreover, the in vitro studies revealed that the CPT@FnH12DiTeFnH12 micelles exhibited efficient uptake in Hela cells. Notably, about five times lower dosage of loaded CPT had a higher tumor cells growth inhibition than the free CPT, and cell membrane permeability became better with the increase of the fluorocarbon chain length. The CPT@FnH12DiTeFnH12 micelles exhibit excellent physical and chemical properties and good therapeutic effects, indicating their excellent potential for drug delivery and providing a novel avenue for chemotherapy.
研究领域:
药学
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高分子化学
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纳米医学
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产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 27
·2308590
·
IF 13
Xiang Xu,Ying Wang,Yeqin Ji,Zhijian Chen,Chunhui Lu,Xinlong Xu,Dengxin Hua
Flexible broadband photodetectors are desired but challenging to be fabricated for next-generation wearable intelligent optoelectronic devices. Considering the narrow bandgap and strong light absorption, molybdenum telluride (MoTe 2 ) based photoelectrochemical photodetectors are successfully assembled by liquid phase exfoliation accompanied with the electrophoretic deposited method. This MoTe 2 -based photodetector shows a broadband detection in ultraviolet–near-infrared band, long-term stability within 18000 s, and fast response in millisecond-level (response time≈19 ms, recovery time≈26 ms). More importantly, even though the MoTe 2 photodetector is bent and twisted at a high degree for several hundred times, it still shows excellent flexibility with stable on-off switching characteristics. Additionally, this photodetector displays a good response for rotation angles in the range from 0° to 360°, and the extracted I ph maintain almost the same value approximately 0.97 µA cm −2 , suggesting an omnidirectional detection capability. This work demonstrates the proposed flexible photoanode shows a great potential in future broadband omnidirectional detection systems.
研究领域:
纳米生物医学
·
光电子学
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材料科学
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生物传感器
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可穿戴设备
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分子诊断
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 15
·2944-2951
·
IF 7.571
Xiaoying Zhang,Xin Wang,Peng Wang,Qiuyue Fu,Zhaozhen Zhu,Chaocai Luo,Jieyi Chen,Yanjiao Zhang,Shaoxin Li
The surface-enhanced Raman scattering (SERS) technique has attracted increasing attention in biomedicine due to the capability of providing the molecular fingerprint information of biosamples. Two-dimensional (2D) metal nanohybrids have proven to be efficient SERS substrates for bioanalysis due to the cooperative Raman enhancement mechanism. Herein, a facile strategy for the fabrication of a novel transition metal telluride-based 2D-metal SERS substrate is proposed. Ag-niobium ditelluride (NbTe2) nanocomposites are synthesized through in situ reduction of Ag nanoparticles on NbTe2 nanosheets (NSs). The excellent SERS performance of Ag–NbTe2 NSs probably originates from the coupling effect of enhanced electromagnetic field distribution around the plasmonic nanostructure (hot spots) and the charge transfer caused by the semiconductor material after numerical simulations. Using Ag–NbTe2 NSs as an ultrasensitive SERS probe, the molecular components of three types of muscle tissues are clearly identified. An effective classification of skeletal, cardiac and smooth muscles is also realized according to their SERS data plus principal component analysis. In addition, the monitoring of the skeletal muscle stretching process is achieved by the Ag–NbTe2 NS-based SERS analysis, which represents a powerful tool for molecular exercise physiology.
研究领域:
生物医学
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材料科学
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光谱学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 31
·1801139
·
IF 13.325
Ning Ma,Ming-Kang Zhang,Xiao-Shuang Wang,Lu Zhang,Jun Feng,Xian-Zheng Zhang
Telluride molybdenum (MoTe 2 ) nanosheets with wide near-infrared (NIR) absorbance are functionalized with polyethylene glycol-cyclic arginine-glycine-aspartic acid tripeptide (PEG-cRGD). After loading a chemotherapeutic drug (doxorubicin, DOX), MoTe 2 -PEG-cRGD/DOX is used for combined photothermal therapy and chemotherapy. With the high photothermal conversion efficiency, MoTe 2 -PEG-cRGD/DOX exhibits favorable cells killing ability under NIR irradiation. Owing to the cRGD-mediated specific tumor targeting, MoTe 2 -PEG-cRGD/DOX shows efficient accumulation in tumors to induce a strong tumor ablation effect. MoTe 2 -PEG-cRGD nanosheets, which are relatively stable in the circulation, could be degraded under NIR ray. The in vitro and in vivo experimental results demonstrate that this theranostic nanoagent, which could accumulate in tumors to allow photothermal imaging and combined therapy, is readily degradable in normal organs to enable rapid excretion and avoid long-term retention/toxicity, holding great potential to treat tumor effectively.
研究领域:
癌症治疗
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材料科学
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生物医学工程
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纳米医学
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DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 12
·2101863
·
IF 6.389
Yuan Liu,Xiaokun Wen,Wenyu Lei,Li Yang,Pengzhen Zhang,Yuhui Zhang,Haixin Chang,Wenfeng Zhang
Besides the widely investigated potential as alternative to silicon in microelectronics, semiconducting 2D transition metal dichalcogenides (TMDs) also show appealing prospects in thin film transistors (TFTs)-based applications, while still suffer from insufficient demonstration. Herein, the authors systematically report high-performance and low-power chemical vapor deposition-grown polycrystalline molybdenum ditelluride (MoTe 2 ) TFTs with solution-processed ternary Hf 0.5 Zr 0.5 O 2 /HfAlO 2 high-k dielectric. Benefitting from the optimized high quality HfAlO 2 film synthesis and proper postannealing treatment, the constructed MoTe 2 TFTs exhibit a high mobility ≈27.24 cm 2 V −1 S −1 , a current on/off ratio ≈6.43 × 10 5 , threshold voltage ≈−3.27 V, and subthreshold swing (SS) value ≈152.4 mV dec −1 , respectively. Moreover, by supplementing another solution-processed layer of ferroelectric Hf 0.5 Zr 0.5 O 2 to form double layer of HfAlO 2 /Hf 0.5 Zr 0.5 O 2 dielectric, the device performance can be further improved with an ignorable hysteresis, increased mobility of ≈55.53 cm 2 V −1 S −1 , and significantly reduced SS value of ≈110.16 mV dec −1 , respectively. The current investigation offers a feasible strategy to fabricate high-performance and low-power MoTe 2 TFTs for potential TMDs-based TFTs applications.
研究领域:
材料科学
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半导体器件
·
薄膜技术
·
纳米电子学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2021
·
IF 8.301
X. Xia,J. Shi,Q. Deng,N. Xu,F. Huang,X. Xiang
Mesoporous organosilica as drug delivery carriers capable of achieving improved cargo release, enhanced biodegradation, and direct imaging with prolonged circulation time and tracking cargo distribution is highly in demand for biomedical applications. Herein, we report a ditelluride-bridged mesoporous organosilica nanoparticle (DTeMSN)/polyethylene glycol-curcumin (PEG-CCM) nanocomposite through coassembly with oxidative/redox and self-fluorescent response. Tellurium is introduced into the silica framework for the first time as a drug delivery vehicle. In this case, the DTeMSNs as an inner core enable disassembly under oxidative and redox conditions via the cleavage of ditelluride bond, facilitating the drug release of doxorubicin (DOX) in a matrix degradation controlled manner. Through the systematical comparison of diselenide-bridged MSNs and DTeMSNs, DTeMSNs exhibit remarkable advantages in loading capacity, drug release, and degradation behavior, thereby significantly affecting the cytotoxicity and antitumor efficacy. The self-fluorescent response of PEG-CCM shell coated on the surface of DTeMSNs can real-timely track the cellular uptake, DOX release, and biodistribution owing to the intrinsic and stable fluorescence of CCM. Moreover, PEG-CCM could prolong circulation time, provide preferable drug accumulation in tumors, and increase antitumor efficacy of DOX-loaded DTeMSNs. Our findings are likely to enrich the family of organosilica that served as fluorescence-guided drug delivery carriers.
研究领域:
纳米技术
·
药物递送系统
·
生物医学工程
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Mengying Hou,Xuejie Wu,Ziyin Zhao,Qiurong Deng,Yongbing Chen,Lichen Yin
Neutrophils serve as a key contributor to the pathophysiology of myocardial ischemia reperfusion injury (MIRI), because the unregulated activation and infiltration of neutrophils lead to overwhelming inflammation in the myocardium to cause tissue damage. Herein, endothelial cell-targeting and reactive oxygen species (ROS)-ultrasensitive nanocomplexes (NCs) were developed to mediate efficient co-delivery of VCAM-1 siRNA (siVCAM-1) and dexamethasone (DXM), which cooperatively inhibited neutrophil recruitment by impeding neutrophil migration and adhesion. RPPT was first synthesized via crosslinking of PEI 600 with ditellurium followed by modification with PEG and the endothelial cell-targeting peptide cRGD. RPPT was allowed to envelope the DXM-loaded PLGA nanoparticles and condense the siVCAM-1. After systemic administration in rats experiencing MIRI, the cRGD-modified NCs efficiently targeted and entered the inflamed endothelial cells, wherein RPPT was sensitively degraded by over-produced ROS to trigger intracellular siVCAM-1 release and potentiate the VCAM-1 silencing efficiency. As a consequence of the complementary function of DXM and siVCAM-1, the NCs notably mitigated neutrophil infiltration into ischemic myocardium, provoking potent anti-inflammatory efficacy to reduce MIRI and recover cardiac function. The present study offers an effective approach for the controlled co-delivery of siRNA and drug cargoes, and it also highlights the importance of multi-dimensional manipulation of neutrophils in anti-inflammatory treatment. Statement of significance The unregulated activation and infiltration of neutrophils lead to overwhelming inflammation in the myocardium after myocardial ischemia reperfusion injury (MIRI). Here, endothelial cell-targeting and ROS-ultrasensitive nanocomplexes (NCs), comprised of PLGA NPs decorated with cRGD-poly(ethylene glycol) (PEG)-modified, ditellurium-crosslinked PEI (RPPT), were developed to mediate efficient co-delivery of VCAM-1 siRNA (siVCAM-1) and dexamethasone (DXM). DXM and siVCAM-1 with complementary functions inhibited both the migration and adhesion of neutrophils, efficiently interventing the neutrophil recruitment and interrupting the self-amplified inflammation cascade in the injured myocardium. The molecular design of RPPT renders an effective example for constructing polymeric materials with high ROS sensitivity, and it resolves the critical dilemma related to polycation-mediated siRNA delivery, such as siRNA encapsulation versus release, and transfection efficiency versus toxicity.
研究领域:
药学
·
纳米技术
·
心血管研究
·
分子生物学
·
炎症
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）