INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Yi-Gang Chen,Nan Yang,Xing-Xing Jiang,Yao Guo,Xian-Ming Zhang
The first lead tellurate–nitrate nonlinear-optical (NLO) crystal, Pb9Te2O13(OH)(NO3)3, featuring a 3D anionic diamondlike toplogical structural motif formulated as [Pb9O13]8– constructed by unique nonanuclear basket-shaped Pb@Pb8O14 clusters has been hydrothermally achieved, in which the Pb@Pb8O14 cluster shows a core–shell structure with one PbO10 polyhedron enclosed by eight PbOx (x = 3 and 4) polyhedera via edge and face sharing. The hexavalent Te in TeO5(OH) octahedra is linked to a [Pb9O13]8– cluster to form a rare [Pb9Te2O13(OH)]3+ cationic framework. The compound demonstrates a powder second-harmonic-generation (SHG) response of about 1.2 times that of KH2PO4 (KDP) as well as a wide transparency range. Calculations on the local dipole moment and SHG coefficient reveal that the net polarization is zero because of a Kleinman-forbidden point group. Further analysis shows that the SHG response results from structure-induced variations by thermal vibrations of the lattice rather than the intrinsic dipole moment, which offers another insight on the design of new NLO materials.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 33
·335701
·
IF 3.44
Yichun Wang,Jinwei Chen,Feilong Zhou,Jie Zhang,Xiaoyang Wei,Rui Luo,Gang Wang,Ruilin Wang
In order to obtain a loaded Pt-based catalyst with enhanced high activity and stability towards formic acid electro-oxidation (FAO), PtTe nanoparticles loaded on graphene oxide (GO) were fabricated by a facile and scalable method. XRD and HRTEM results show that the morphology of PtTe particles could be affected by the additive amount of GO and Te. It is observed that the supported PtTe particles are cubic. The XPS results show the change in the Pt electronic structure after the incorporation of Te, which impedes the chemisorption of the CO intermediate and promotes the dehydrogenation pathway of FAO. By electrochemical analysis, the performance towards FAO is greatly enhanced. The mass activity of PtTe/GO-67 is 2165.53\,{\rm{mA}}\,{{\rm{mg}}}_{{\rm{Pt}}}^{-1} at 0.45 V (versus SCE), which is 11.5 times as high as that of Pt/C (188.44\,{\rm{mA}}\,{{\rm{mg}}}_{{\rm{Pt}}}^{-1}). The incorporation of Te atoms and the content of GO are two major parameters for tuning the crystal structure and morphology and enhancing catalytic activity.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiang Wang,Siliang Wang,Ning Wei,Rangyun Wu,Wei Zeng,Li Wen,Zhiliang Chen,Pengbin Gui,Dong Liang
Recently, metal chalcogenides (MCS) with high conductivity, natural abundance and stable structure are kind of the potential cathode materials of aqueous zinc-ion batteries (ZIBs). However, compared with manganese based and vanadium based cathode materials, there are few studies and reports on MCS in the field of ZIBs. Here, for the first time, 2D layered Bi 2 Te 3 nanosheets were used as cathode to construct a novel aqueous Bi 2 Te 3 /zinc battery. A series of experiments and calculations in this work have verified that Bi 2 Te 3 nanosheets are excellent cathode material for ZIBs. Thanks to robust structure, good electronic conductivity and low zinc ion diffusion energy barrier of Bi 2 Te 3 nanosheets, the aqueous Bi 2 Te 3 /zinc battery exhibits a large reversible capacity of 413.2 mAh/g (0.4 A/g) and long lifespan of 1500 cycles (77% retention at 2 A/g) in 2 M ZnSO 4 electrolyte. Besides, the quasi-solid-state Bi 2 Te 3 /zinc battery shows excellent rate performance and high thermal stability (works well in a high temperature environment of 70 ℃). This work provides enlightenment for the development of advanced cathode materials for new generation of ZIBs with high performance, safety and stability.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2022
·
IF 4.939
Panyi Wang,Yingying Cui,Senlong Zhao,Renguang Ye,Muzhi Cai,Laurent Calvez,Jean Rocherulle,Feifei Huang,Hongli Ma,Gongxun Bai,Junjie Zhang,Shiqing Xu,Xianghua Zhang
Germano-tellurite niobate glasses have gained significant interest because of their applications in lasers and optical devices. However, germano-tellurite niobate glasses tend to turn brown or dark, which is a major disadvantage for visible optical systems. This work is devoted to exploring the mechanism of this color-changing. Glasses with a molar composition of 70TeO 2 -10GeO 2 -10K 2 O-10Nb 2 O 5 (TGKN) were synthesized by conventional melt-quenching at various melting temperatures. Different melting temperature leads the glasses to present different colors. The precise glass composition was revealed by ICP-OES, and the thermal properties, optical properties, and microstructure of the TGKN glasses were investigated. The XRD patterns and DSC curves suggest that the formation of Te metal is not the principal reason for the color-changing. A novel interpretation that the generation of T-Nb 2 O 5 causes the color-changing was proposed based on the transmittance, XPS and Raman spectra. This work will provide a new perspective on clarifying the effects of melting temperature on color-changing in the germano-tellurite niobate glass.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Rui Wang,Zihan Meng,Xuemin Yan,Tian Tian,Ming Lei,Rami Adel Pashameah,Hala M. Abo-Dief,Hassan Algadi,Nina Huang,Zhanhu Guo,Haolin Tang
Pyrolysis-acquired iron and nitrogen codoped carbon (Fe-N-C) has been comprehensively investigated for its promising oxygen reduction reaction (ORR) catalytic performance and structural complexity. The modification of non-metal elements with larger atomic radius and the corresponding intrinsic microstructure-property relations are rarely reported. In this study, tellurium (Te) intervened Fe-N-C was prepared by micelles-induced polymerization with Te nanowires as an in-situ intervening agent. The out-plane bonding of Te with Fe induced the increase of both N content and proportion of pyridinic N on the material surface, thus improving the ORR catalytic performance. The assembled Zn-air battery demonstrated a maximum power density of 250 mW/cm 2 and excellent rate capability under various discharge current densities, which was much better than the Pt/C. Overall, the current work demonstrates a novel Te/Fe-N-C material and reveals an original Te intervened Fe-N-C strategy and N reconfiguration mechanism, which is of great significance for the design of key materials in energy-related fields.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Xuan Huang,Bingyan Xu,Jie Feng,Shengnan Hu,Wenjie Dou,Tang Yang,Changhong Zhan,Shangheng Liu,Yujin Ji,Youyong Li,Chih-Wen Pao,Zhiwei Hu,Qi Shao,Xiaoqing Huang
Phase regulation of noble metal-based nanomaterials provides a promising strategy for boosting the catalytic performance. However, realizing the continuous phase modulation in two-dimensional structures and unveiling the relevant structure-performance relationship remain significant challenges. In this work, we present the first example of continuous phase modulation in a library of Pd–Te hexagonal nanoplates (HNPs) from cubic-phase Pd4Te, rhombohedral-phase Pd20Te7, rhombohedral-phase Pd8Te3, and hexagonal-phase PdTe to hexagonal-phase PdTe2. Notably, the continuous phase regulation of the well-defined Pd–Te HNPs enables the successful modulation of the distance between adjacent Pd active sites, triggering an exciting way for tuning the relevant catalytic reactions intrinsically. The proof-of-concept oxygen reduction reaction (ORR) experiment shows a Pd–Pd distance-dependent ORR performance, where the hexagonal-phase PdTe HNPs present the best electrochemical performance in ORR (mass activity and specific activity of 1.02 A mg–1Pd and 1.83 mA cm–2Pd at 0.9 V vs RHE). Theoretical investigation reveals that the increased Pd–Pd distance relates to the weak *OH adsorption over Pd–Te HNPs, thus contributing to the remarkable ORR activity of PdTe HNPs. This work advances the phase-controlled synthesis of noble metal-based nanostructures, which gives huge impetus to the design of high-efficiency nanomaterials for diverse applications.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Xue Shao,Guanglei Yao,Xiaoping Chen,Fengxian Qiu,Tao Zhang
Two-dimensional (2D) membrane materials are widely employed for the accurate sieving of ionic contaminants and are of great importance for water reuse . However, 2D membrane materials often suffer from uneven thickness and surface defects , which severely limit their application prospects. Herein, a continuous 2D membrane (LCUM/D) was prepared using cellulose nanofibrils (CNFs) as the support backbone for the assembled layered double hydroxides (LDHs) and dopamine (DA) as the adhesive. The results demonstrated that LDHs could be uniformly distributed in the network structure of CNFs, and the defects on the membrane surface could be effectively compensated by DA. Simultaneously, the continuous LCUM/D showed excellent rejection (97.18%) and selectivity of ionic contaminants tellurium. Dopamine not only compensated for the surface defects of the 2D membrane and enhanced the rejection of tellurium, but also caused no significant loss of water permeance. Moreover, the LCUM/D exhibited stability, which facilitated its long-term application. In addition, the improved hydrophilicity allowed LCUM/D satisfactory anti-fouling properties. This study provides new dimensional insights into the fabrication of continuous 2D membranes for the removal of ionic contaminant and enhances their application prospects in wastewater treatment .
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SmartMat
·
2023
·
IF 20.4
Zongxiao Wu,Junlei Qi,Wenbin Wang,Peng Yang,Chen Ma,Haoxin Huang,Kai Bao,Jingkun Wu,Chengxuan Ke,Ye Chen,Chaoliang Tan,D. V. Maheswar Repaka,Qiyuan He
The remarkable successes of graphene have sparked increasing interest in elemental two-dimensional (2D) materials, also referred to as Xenes. Due to their chemical simplicity and appealing physiochemical properties, Xenes have shown particular potential for numerous (opto) electronic, iontronic, and energy applications. Among them, layered α-phase tellurene has demonstrated the most promise, thanks to the recent successes in the chemical synthesis of highly crystalline 2D tellurene. However, the general electronic and electrochemical properties of tellurene in electrolyte systems remain ambiguous, hindering their further development. In this work, we studied the electrostatic gating, electrocatalysis, and electrochemical stability of tellurene in electrolyte systems. Our results show that tellurene obtained from both hydrothermal and chemical vapor deposition methods, two mainstream synthetic approaches for Xenes, demonstrates thickness-dependent ambipolar transport with high hole mobility and stability in both aqueous electrolytes and ionic liquids. More importantly, the electrochemical properties of tellurene are investigated via the emerging on-chip electrochemistry. Pristine tellurene demonstrates hydrogen evolution reaction with low Tafel slopes and remarkable electrochemical stability in acidic electrolytes over a large potential window. Our study provides a comprehensive understanding of the iontronic and electrochemical properties of tellurene, paving the way for the broad adoption of Xenes in sensors, synaptic devices, and electrocatalysis.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 19
·4455-4462
·
IF 5
Yanmei Ren,Rongke Sun,Xue Yu,Ruoxi Wang,Wusheng Zhang,Xiaodong Zhu,Yanqing Ma,Lei Ma
The controlled growth of tellurium (Te) nanocrystals is vital for making Te-based nanomaterials with finely tuned morphology and thermoelectric properties. Herein, to reveal the controlling parameters and their roles behind the synthesis of Te nanowire bundles (NBs), they were systematically investigated. The unveiled growth mechanism of Te-NBs is a “solid-solution-solid” transformation process from amorphous Te (a-Te) spheres to trigonal Te (t-Te) NBs. Accordingly, Te-NBs with different sizes and crystallinity have been successfully prepared by simply adjusting the reaction temperature and initial solution pH to regulate the generating rate of Te atoms and the dissolution rate of a-Te spheres. Well-ordered Te-NBs with a large width and high crystallinity can be synthesized at an optimized reaction temperature of 90 °C and an initial solution pH value of 10. The relationship between the thermoelectric properties of the Te-NB thin film (Te-NBs-TF) and the width and crystallinity of the NBs exposes that a large width and high crystallinity lead to a high thermoelectric performance of Te-NBs-TFs, and the optimized results can reach a power factor of 35.2 μW m−1 K−2 at room temperature. This work provides crucial information for the controllable synthesis of Te-NBs and a facile preparation avenue of Te-based thermoelectric films, which paves the way for future industrial applications of high-performance thermoelectric devices.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Hui Ran,Zheng-zhong Lin,Cheng-yi Hong,Jun Zeng,Qiu-Hong Yao,Zhi-Yong Huang
Rapid detection of malachite green (MG) by fluorescence probes of CdTe quantum dots (QDs) coated with molecularly imprinted polymer (MIP) has been reported, but low sensitivity, slow response and narrow linear range were the main disadvantages for these MIP@QDs probes. Here, an ultra-sensitive ratiometric fluorescence probe based on self-assembly functionalized polystyrene (PS) and core-shell structured MIP was developed for the detection of MG in fish. After modified with poly(diallyldimethylammonium chloride) and hexadecyl trimethyl ammonium bromide, CdTe QDs and silica encapsulated carbon quantum dots (CDs@SiO 2 ) with negative charges, used as detection and reference fluorophores, were respectively self-assembled on the surface of PS to form PS-QDs&CDs. And a core-shell structured MIP layer was fabricated on the surface of PS-QDs&CDs to form a ratiometric fluorescence probe of MIP@PS-QDs&CDs with sol-gel method using MG, (3-aminopropyl)triethoxy-silan and tetraethyl orthosilicate as template, functional monomer and cross-linker, respectively. With intensive fluorescence densities of QDs&CDs in nucleus, the fluorescence emission of probe at λ em of 630 nm could be linearly quenched by MG, while the fluorescence emission at λ em of 430 nm remained unchanged. The probe of MIP@PS-QDs&CDs owned good fluorescence stability (RSD ≤2.3%), fast response time (5 min), wide linear range (0.1–32 μmol L −1 ) and low detection limit (5.6 μg kg −1 ), and has been applied to the detection of MG in fish samples with recoveries of 94.3–110.2%. The result validated that the as-prepared probe of MIP@PS-QDs&CDs had an excellent performance for MG detection in fish samples.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
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
·
高分子化学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2018
·
IF 9.89
Huifang Ma,Weiqi Dang,Xiangdong Yang,Bo Li,Zhengwei Zhang,Peng Chen,Yuan Liu,Zhong Wan,Qi Qian,Jun Luo,Ketao Zang,Xiangfeng Duan,Xidong Duan
Two-dimensional (2D) metallic transition metal dichalcogenides (MTMDs) have recently drawn increasing interest for fundamental studies and potential applications in catalysis, charge density wave (CDW), interconnections, spin-torque devices, as well superconductors. Despite some initial efforts, the thickness-tunable synthesis of atomically thin MTMDs remains a considerable challenge. Here we report controlled synthesis of 2D cobalt telluride (CoTe2) nanosheets with tunable thickness using an atmospheric pressure chemical vapor deposition (APCVD) approach and investigate their thickness-dependent electronic properties. The resulting nanosheets show a well-faceted hexagonal or triangular geometry with a lateral dimension up to ∼200 μm. Systematic studies of growth at varying growth temperatures or flow rates demonstrate that nanosheets thickness is readily tunable from over 30 nm down to 3.1 nm. X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution scanning transmission electron microscope (STEM) studies reveal the obtained CoTe2 nanosheets are high-quality single crystals in the hexagonal 1T phase. Electrical transport studies show the 2D CoTe2 nanosheets display excellent electrical conductivities up to 4.0 × 105 S m–1 and very high breakdown current densities up to 2.1 × 107 A/cm2, both with strong thickness tunability.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）