JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 8
·082501
·
IF 3.721
Kejia Liu,Yaowu Wang,Yuezhong Di,Jianping Peng,Jing You,Naixiang Feng,Yi Zhang
Diagrams of the equilibrium potential E (relative to the standard chlorine electrode) against the activity of oxide ion ( expressed as its logarithm, pO2−) in systems of Ti-O-Cl-M (M=Li, Na, Mg, Ca, Sr and Ba) were plotted to investigate the electro-deoxidation of porous TiO2 pellets in different chloride molten salts, including LiCl, NaCl, MgCl2, CaCl2, SrCl2 and BaCl2. From the diagrams, the reduction pathways of TiO2 in different molten salts are similar; and the applied potential (vs Cl−/Cl2) on the cathode and O2− ion activity influence greatly on the reduction pathway of TiO2 and the deoxidation limit. To test and verify the results of the thermodynamic analysis, electro-deoxidation experiments in different molten salts were done to determine the actual pathways in the electrochemical reduction of TiO2 and the possible deoxidation limits in the molten salts. The results indicated that the thermodynamic analysis is helpful in predicting and understanding the electrochemical reduction process of titanium oxides though the experimental results differ slightly from the thermodynamic analysis in some systems. Low-oxygen Ti can be obtained only in molten CaCl2.
研究领域:
材料科学
·
电化学
·
冶金学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zixia Tang,Hong Tao,Xiao Wang,Lu Chen,Chi Song,Guanhong Lu,Xiaofeng Xie,Jing Sun
The implantation of metal nanoparticles (MNPs) into metal–organic framework (MOF) hosts is a promising means to prepare high-performance photocatalysts for the degradation of gas pollutants. However, the uniform encapsulation of MNPs in MOFs is still challenging. Herein, a facile “quasi-in situ” encapsulation method is proposed by utilizing the spatial confinement effect of the colloidal network formed during the synthesis of the MIL-100(Fe) monolith [noted as m-MIL-100(Fe)]. Highly dispersed Ag NPs with an average diameter of ∼2 nm are encapsulated in the MIL-100(Fe) monolith to form a unique “watermelon-seed” structure, which ensures the large contact area between the two components and protects Ag NPs from being oxidized. The fast charge transfer between m-MIL-100(Fe) and Ag NPs enables the spatial separation of electron–hole pairs and promotes the generation of oxidative radicals. Compared with pristine m-MIL-100(Fe), the 0.2 wt % Ag@m-MIL-100(Fe) composite shows obviously enhanced photodegradation efficiencies for flowing o-xylene under both xenon (∼97%) and visible light (∼80.0%) with high stability. This work not only provides a promising Ag@m-MIL-100(Fe) material for eliminating air pollutants but also gives a versatile means for the design and synthesis of nanoparticles@MOFs composites with desired performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 26
·21101-21110
·
IF 2.779
Wang Zhaohui,Fang Weishuang,Tang Ying,Xiang Huaicheng,Li Jie,Fang Liang
Ca 3 MZnGe 3 O 12 ( M = Zr, Sn) ceramics crystallized in a cubic garnet structure (A 3 B 2 C 3 O 12 ) with a space group of Ia- 3 d , and promising microwave dielectric properties with low coefficients of thermal expansion ( α L ) were obtained, namely, ε r = 10.5 and 9.3, Q × f = 79,700, and 96,040 GHz, τ f = − 36.1 and − 61.5 ppm/°C, and α L = 4.3 and 4.7 ppm/°C for Ca 3 ZrZnGe 3 O 12 and Ca 3 SnZnGe 3 O 12 , respectively. Bond valence calculation reveals that Ca 3 SnZnGe 3 O 12 exhibits a slight “compressed” effect at A-site and B-site with a slightly negative deviation (Δ ε r ~ − 1.01%) of the porosity corrected ε r (corr) from theoretical ε r (C–M) calculated by the C–M equation, while Ca 3 ZrZnGe 3 O 12 shows a “rattling” effect at the A-site and C-site with a large positive Δ ε r ~ 15.8%, leading to a high ε r , a more close to zero τ f and a lower Q × f value as compared to those of Ca 3 SnZnGe 3 O 12 . The relationship between structure and their intrinsic microwave dielectric properties was investigated by complex chemical bond theory and far-infrared reflectivity spectra.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 16
·8816-8824
·
IF 7.443
Jinli Zhang,Yuyan Hai,Yi Zuo,Qian Jiang,Chang Shi,Wei Li
Novel polyamide thin film composite (TFC) nanofiltration (NF) membranes were prepared on polyetherimide supports by the interfacial polymerization of 1,2,4,5-benzene tetracarbonyl chloride and m-phenylenediamine followed by modification with ethylenediamine (EDA). The TFC NF membranes thus prepared were characterized by attenuated total reflection Fourier transform infrared (ATR-FTIR), solid-state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS); these results indicated that by covalent bonding with EDA, the unstable carboxylic groups on the initially generated poly(amic acid) (PAA) TFC membrane surfaces were effectively transformed into polyamide, including the methylene group in the chemical structure chain, for preparing the PAA-cov-EDA NF membranes. At an operating pressure of 1.0 MPa, the PAA-cov-EDA NF membrane exhibits a glucose rejection of 90% at a flux of 25 L m−2 h−1, and a MgSO4 rejection of 76% at a flux of 31 L m−2 h−1, in particular demonstrating its superior chlorine resistance, after being immersed in a 200 ppm NaClO solution for 100 h. Such novel polyamide TFC NF membranes have the advantages of mild preparation conditions and high rejection towards low-molecular-weight organics, thus demonstrating their potential in the pharmaceutical industry.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yuxin Zuo,Wenjie Wei,Yaran Wang,Shen Wang,Zhongjun Wang,Yu Shu,Zhiqi Liu
Linear low-density polyethylene (LLDPE) films have garnered significant attention. However, their poor thermal insulation properties and limited functionality severely restrict applications. This study prepared an LDH/LLDPE composite film (LD-1.5%K) with excellent optical properties and high-performance infrared insulation by blending γ-(methacryloyloxy) propyltrimethoxysilane (KH570) dry-modified layered double hydroxide (D200) with LLDPE. D200 exhibits a refractive index close to LLDPE. Its incorporation significantly reduces the average infrared transmittance of LLDPE films. Surface modification of D200 with KH570 promotes uniform blending with LLDPE. As a result, the LD-1.5%K film delivers outstanding optical properties (high visible light average transmittance of 90.8%, and low haze of 23.5%) The film also achieves low infrared average transmittance. This low infrared transmittance endows LD-1.5%K film with excellent heat retention (up to 4°C) and recyclable stability. Consequently, this approach promotes crop growth and offers good economic value. Applying LD-1.5%K in areas with strong ultraviolet radiation and cold climates is effective. It provides a promising solution for future cultivation in harsh environments.
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 18
·3482-3490
·
IF 5.958
Zhongfu Song,Hongwei Yu,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
Three phosphates Rb2Zn3(P2O7)2 and Cs2M3(P2O7)2 (M = Zn and Mg) were successfully synthesized by a high-temperature solution method. Their structures were determined by single-crystal X-ray diffraction, which shows that the three structures all display three-dimensional [M3P4O20]14− (M = Zn and Mg) frameworks composed of isolated P2O7 dimers and MO4 (M = Zn and Mg) tetrahedra with Rb+/Cs+ cations located in the space of the frameworks to balance charges. But owing to the cationic size effect, they are not iso-structural. Rb2Zn3(P2O7)2 crystallizes in the non-centrosymmetric P21 space group, whereas Cs2M3(P2O7)2 (M = Zn and Mg) crystallize in the centrosymmetric P21/c space group. And Rb2Zn3(P2O7)2 exhibits a second harmonic generation (SHG) response as large as that of KH2PO4 (KDP). Combining electronic structure and SHG density calculations, we studied the effects of ZnO4 tetrahedra on the SHG response of Rb2Zn3(P2O7)2. Furthermore, a structural comparison is also carried out in Rb2Zn3(P2O7)2 and Cs2M3(P2O7)2 (M = Zn and Mg).
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-14
·
IF 5.228
Qiang Yujie,Guo Lei,Zhang Shengtao,Li Wenpo,Yu Shanshan,Tan Jianhong
The inhibitive ability of 2,6-diaminopyridine, tartaric acid and their synergistic effect towards mild steel corrosion in 0.5 M HCl solution was evaluated at various concentrations using potentiodynamic polarization measurements, electrochemical impedance spectroscopy (EIS), and weight loss experiments. Corresponding surfaces of mild steel were examined by atomic force microscope (AFM), field emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) analysis. The experimental results are in good agreement and reveal a favorable synergistic effect of 2,6-diaminopyridine with tartaric acid, which could protect mild steel from corrosion effectively. Besides, quantum chemical calculations and Monte Carlo simulation were used to clarify the inhibition mechanism of the synergistic effect.
研究领域:
材料科学
·
腐蚀科学
·
电化学
·
表面科学
·
金属材料
·
物理化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 40
·12545-12552
·
IF 0
Aibin Huang,Yijie Zhou,Yamei Li,Shidong Ji,Hongjie Luo,Ping Jin
A fast, low-temperature hydrothermal method was introduced to prepare a VxW1−xO2(B) ultrathin nanostructure which can be easily transformed into VxW1−xO2(M) via a fast annealing process in an inert atmosphere. Thermochromic foils coated with ultrathin V0.98W0.02O2(M) nanopowders exhibited unsatisfactory optical properties with a weak solar regulation efficiency (ΔTsol, 4.6%) and a low luminous transmittance (Tlum-L, 15.73%) in a low-temperature state. Coating the VxW1−xO2(M) nanostructure with a thin shell of SiO2 can improve the optical performance of the thermochromic foils resulting in ΔTsol of 7.15% and Tlum-L of 25.74%. Furthermore, etching the V0.98W0.02O2(M)@SiO2 core–shell nanostructure with diluted hydrochloric acid (HCl) can optimize the optical properties of the thermochromic foils well, resulting in ΔTsol and Tlum-L of up to 10.18% and 37.37% owing to the decreased size. In summary, we employed a simple method to synthesize V1−xWxO2@SiO2 ultrathin nanostructures and provided new insight into optimizing VO2-based thermochromic windows.
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DOI
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wei Wang,Jian Bao,Changhao Wang,Guoqiang He,Xin Wang,Diming Xu,Biaobing Jin,Zhongqi Shi,Moustafa Adel Darwish,Yawei Chen,Qixin Liang,Meirong Zhang,Di Zhou
The advancement of millimeter-wave communication desires the ceramic substrate with low permittivity ( ԑ r ) to meet the requirements of high transmission rates, low latency and wide bandwidth. However, the thermal conductivity of most low- ԑ r ceramics is too low to deal with heat dissipation in millimeter-wave applications. In this paper, we reported novel dielectric ceramics Li M SiO 4 ( M = Ga, Sc and Y) with excellent performances of low ԑ r (< 10) and high thermal conductivity (> 6 W mK −1 ). Their dielectric properties in both microwave and THz were investigated, where the LiGaSiO 4 ceramic achieved the lowest ԑ r of ∼5.2, the LiScSiO 4 ceramic presented extremely low loss ( Q × f ∼ 96,700 GHz, Q = 1/dielectric loss, f is resonant frequency), and the LiYSiO 4 ceramic showed a positive temperature coefficient of f (TCF ∼ +32 ppm °C −1 ). The distinct dielectric behavior was subsequently studied by structure-performance relationship in terms of M -site cations and bond parameters using bond valence theory, Phillips–Van Vechten–Levine chemical bond theory and so on. Moreover, a 36 GHz microstrip array antenna was designed and simulated using the LiGaSiO 4 ceramic substrate, obtaining high realized gain, high radiation efficiency and low sidelobe. The result demonstrated the great potential of LiMSiO 4 -type dielectric ceramics in millimeter-wave communications.
研究领域:
材料科学
·
电子工程
·
通信技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Kangkang Yang,Qilu Yao,Wei Huang,Xiangshu Chen,Zhang-Hui Lu
In this work, a series of Ni 1-x M x (M = Cr, Mo, W) nanoparticles (NPs) have been successfully synthesized via a simple surfactant-aided co-reduction method and employed as highly efficient and cost effective catalysts for hydrogen generation from aqueous solution of ammonia borane (NH 3 BH 3 , AB) at room temperature . It is found that the as-synthesized NiM NPs (M = Cr, Mo, W) exhibit much higher catalytic performance for the hydrolysis of AB as compared to that of pure Ni NPs. In addition, among all the Ni 1-x M x (M = Cr, Mo, W) NPs, the Ni 0.9 Cr 0.1 , Ni 0.9 Mo 0.1 , and Ni 0.8 W 0.2 NPs show the highest catalytic activities with the turnover frequency (TOF) values of 10.7, 27.3 and 25.0 mol H 2 (mol metal min) −1 , respectively. Remarkably, these optimized NiM catalysts can also perform efficiently in the hydrolysis of hydrazine borane (N 2 H 4 BH 3 , HB). The present low-cost and high-performance of the NiM catalysts system may encourage the practical application of AB and HB as the promising chemical hydrogen storage materials .
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Yang Hu,Xiaoyue Lu,Mingche Huang,Erhong Song,Bowen Chen,Feiyan Cai,Yuefan Xu,Yinjie Ruan,Chaobin Zeng,Ling Lin,Yan Gu,Yusheng Ding,Dewei Ni,Shaoming Dong
The initial oxidation stage of high-entropy carbides (HECs) is a decisive yet poorly understood “black box” that governs their ultimate performance for ultra-high-temperature applications. Here, we unveil a powerful strategy—predesigning carbon vacancies—to fundamentally enhance HECs oxidation resistance. By integrating in situ x-ray diffraction (XRD) and in situ transmission electron microscopy coupled with electron energy loss spectroscopy (TEM-EELS), we provide the first direct, atomic-scale visualization of oxygen atoms preferentially occupying these predesigned vacancies during the incipient oxidation stage, leading to the dynamic formation of a metastable metal–carbon–oxygen (M–C–O) interfacial layer. Our combined experimental and theoretical analyses reveal a dual enhancement mechanism: kinetically, M–C–O suppresses both oxygen adsorption on the (111) surface and its subsequent inward diffusion; thermodynamically, they stabilize the HEC lattice at elevated temperatures, thereby increasing the energy barrier for M─C bond cleavage. This work not only deciphers the atomistic origin of enhanced oxidation resistance but also establishes a simple, general, and efficient design principle for next-generation ultra-high-temperature ceramics.
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产品关联
DOI
高影响因子
iScience
·
2026
·Vol. 29
·期 8
·
IF 4.5
Hairong Zhao,Chen Yang,Shuangyan Bao,Shuanglong Chen,Qingmo Yang,Yating Gai,Kangliang Lou,Heng Liu,Yang Li,Chenggui Zhang,Ruiqin Yang
Traditional chemotherapy for breast cancer faces limitations, including poor drug bioavailability, multidrug resistance, and severe systemic side effects. Therefore, a carrier-free nanodrug composed of Mastoparan M (Mast-M, derived from Wasp toxin), FDA-approved near infrared fluorescence dye (indocyanine green, ICG), and biosafe ion Fe 3+ was developed to achieve photothermal (PTT) and synergistic chemodynamic therapy (CDT)-assisted oxidation therapy. Once accumulated within tumor sites by enhanced permeability and retention (EPR) effects, the Mast-M/Fe 3+ /ICG rapidly dissociates in response to elevated glutathione (GSH), releasing Fe 2+ , ICG, and Mast-M. Mast-M efficiently triggers reactive oxygen species (ROS) generation to induce mitochondrial membrane potential disruption. Fe 2+ -mediated CDT further amplifies oxidative stress, accompanied by GSH consumption and lipid peroxide (LPO) accumulation. Under laser irradiation, ICG generates hyperthermia to enhance oxidative stress. In vitro and in vivo studies demonstrated enhanced antitumor efficacy with reduced systemic toxicity. Together, these findings highlight the potential of carrier-free nanodrugs for oxidative stress-based breast cancer therapy.
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产品关联
DOI
PubMed
高影响因子
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