CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fenqi Du,Dongmei Yang,Yue Sun,Yang Jiao,Feng Teng,Haibo Fan
Ultrawide band gap semiconductor materials have attracted considerable attention in recent years owing to their great potential in the photocatalytic field. In this study, Zn-doped Ga 2 O 3 nanofibers with various concentrations were synthesized via electrospinning; they exhibited a superior photocatalytic degradation performance of rhodamine B dye compared to that of undoped Ga 2 O 3 nanofibers. The Zn dopant replaced Ga sites via replacement doping, which could increase the concentration of oxygen vacancies and lead to enhanced photocatalytic properties. When the Zn concentration increased, a Ga 2 O 3 /ZnGa 2 O 4 hybrid structure formed, which could further enhance the photocatalytic performance. The separation of photogenerated carriers due to Zn doping and heterojunctions were the primary causes of the enhanced photocatalytic performance. This study provides experimental data for the fabrication of high-performance photocatalysts based on Ga 2 O 3 nanomaterials .
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zixiao Nie,Fuxiang Li,Jialei Li,Longxiang Guo,Zhuo Li,Hao Xu,Hongkang Wang,Yonghong Cheng,Xin Xu
Water-induced side reactions and unfavorable undesirable growth have restricted the further development of aqueous zinc-ion batteries. Electrolyte additives are considered as a pragmatic and viable approach to address this issue, owing to their ease of operation and satisfactory compatibility. This study identifies diprophylline as a promising additive for electrolytes, underscoring its favorable adsorption energy with zinc metal. The selective adsorption of diprophylline has been demonstrated to engender two primary effects. Firstly, it reconstructs a water-lean electric double layer, and secondly, it enhances the textured growth of Zn(002). Furthermore, diprophylline weakens the coordination bonding between Zn 2+ and H 2 O to regulate the solvation structure of Zn 2+ . Consequently, the zinc symmetric battery functions stably for over 2900 h at 5 mA cm −2 . The Zn||Cu asymmetric battery displays an average coulombic efficiency as high as 99.89 % across 4000 cycles. This research presents an affordable and easily operable electrolyte modification method for developing a Zn anode/electrolyte interface that exhibits excellent stability and reversibility.
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DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Chengming Huang,Dingmei Han,Linjie Guan,Linhua Zhu,Yi Mei,Dedong He,Yun Zu
Propane dehydrogenation (PDH) is a prospective benign process for the production of propylene, but generally depends on high-price Pt and toxic Cr(VI) catalysts that often suffer from the rapid deactivation derived from metal sintering and severe coke deposition. To overcome these problems, the breakthroughs in an alternative catalyst design with efficient, low-cost and eco-friendly play a crucial role in successfully developing this process. Here, we facilely fabricate the bimetallic-site catalyst of Ni-Zn anchored in the zeolitic framework of silicalite-1 (depicted as NiZn-S-1) by employing ligand-protected strategy, which performs high temperature stability. Under comparable conditions, the NiZn-S-1 catalyst with high Ni/Zn molar ratio of 3:1 (named 0.2Ni0.06Zn-S-1) exhibits superior catalytic activity (initial propane conversion of 32.5 % and actual TOF propane of 28.5 min −1 ) with low deactivation rate (0.0778 h −1 ) and great propylene selectivity (>90%) after 30 h on stream. In particular, the catalytic performance on this catalyst almost keeps same as that of fresh catalyst after 4 successive oxidation–reduction cycles. Multiple characterizations further demonstrate that the enhancement of PDH performance ought to be attributed to the synergistic effect between bimetallic Ni-Zn sites, which favors the selective activation of C–H bond and propylene desorption to reduce the formation of coke species with high graphitization degree, boosting the improvement of catalyst stability. The design of novel bimetallic-sites catalyst can give a new idea on the development of alternative PDH catalysts with economical- and environment-friendly in the future.
研究领域:
化学工程
·
催化科学
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DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 11
·2570
·
IF 5
Dan Wang,Lin-Huan Du,Long Li,Yu-Meng Wei,Tao Wang,Jun Cheng,Bin Du,Yi Jia,Bao-Yi Yu
Coordination polymers (CPs) are organo-inorganic porous materials consisting of metal ions or clusters and organic linkers. These compounds have attracted attention for use in the fluorescence detection of pollutants. Here, two Zn-based mixed-ligand-bearing CPs, [Zn2(DIN)2(HBTC2−)2] (CP-1) and [Zn(DIN)(HBTC2−)]·ACN·H2O (CP-2) (DIN = 1,4-di(imidazole-1-yl)naphthalene, H3BTC = 1,3,5-benzenetricarboxylic acid, and ACN = acetonitrile), were synthesized under solvothermal conditions. CP-1 and CP-2 were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis, and powder X-ray diffraction analysis. Solid-state fluorescence analysis revealed an emission peak at 350 nm upon excitation at 225 and 290 nm. Fluorescence sensing tests showed that CP-1 was highly efficient, sensitive, and selective for detecting Cr2O72−at 225 and 290 nm, whereas I−was only detected well at an excitation of 225 nm. CP-1 detected pesticides differently at excitation wavelengths of 225 and 290 nm; the highest quenching rates were for nitenpyram at 225 nm and imidacloprid at 290 nm. The quenching process may occur via the inner filter effect and fluorescence resonance energy transfer.Keywords:coordination polymers;fluorescence sensing;d10metal;CP;sensing ions;sensing pesticides
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Regenerative Biomaterials
·
2024
·
IF 5.6
Yang Shuaikang,Wang Weiqiang,Xu Yanan,Yuan Yonghui,Hao Shengzhi
Fe-based biodegradable materials have attracted significant attention due to their exceptional mechanical properties and favorable biocompatibility. Currently, research on Fe-based materials mainly focuses on regulating the degradation rate. However, excessive release of Fe ions during material degradation will induce the generation of reactive oxygen species (ROS), leading to oxidative stress and ferroptosis. Therefore, the control of ROS release and the improvement of biocompatibility for Fe-based materials are very important. In this study, new Fe–Zn alloys were prepared by electrodeposition with the intention of using Zn as an antioxidant to reduce oxidative damage during alloy degradation. Initially, the impact of three potential degradation ions (Fe2+, Fe3+, Zn2+) from the Fe–Zn alloy on human endothelial cell (EC) activity and migration ability was investigated. Subsequently, cell adhesion, cell activity, ROS production and DNA damage were assessed at various locations surrounding the alloy. Finally, the influence of different concentrations of Zn2+ in the medium on cell viability and ROS production was evaluated. High levels of ROS exhibited evident toxic effects on ECs and promoted DNA damage. As an antioxidant, Zn2+ effectively reduced ROS production around Fe and improved the cell viability on its surface at a concentration of 0.04 mmol/l. These findings demonstrate that Fe–Zn alloy can attenuate the ROS generated from Fe degradation thereby enhancing cytocompatibility.
研究领域:
材料科学与工程
·
细胞生物学
·
医学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Kun Qian,Zhengjun Yao,Haiyan Lin,Jintang Zhou,Azhar Ali Haidry,Tongbaihui Qi,Wenjing Chen,Xinlu Guo
Nanocrystalline Ni–Zn ferrites with different neodymium contents (Ni 0.5 Zn 0.5 Nd x Fe 2-x O 4 ) were synthesized by sol-gel route combined with self-propagating combustion (SPC) method. The presence of surface functional groups, crystal structure and morphology of the samples were studied by FT-IR, XRD and SEM. The results show that the prepared samples are composed of spinel phase under the condition of low neodymium content, like the pure Ni–Zn ferrite. While neodymium oxide appears after the content of Nd 3+ exceeds a certain limit (x > 0.04) and there exist two phases in the ferrite. The results of vibrating sample magnetometer (VSM) and vector network analyzer (VNA) show that adjusting the content of Nd is significant in improving the dielectric properties and microwave absorption capacity of the materials, specifically at low frequencies. When x < 0.04, the enhancement of dielectric loss ability of spinel ferrites by doping Nd 3+ is the dominant factor affecting microwave absorption ability of samples. The secondary phase Nd 2 O 3 hardly appears under this condition, thus the weakening effect of Nd 3+ addition on magnetic loss ability is not obvious. When x = 0.04, the optimal absorption peak of the material reaches −20.8 dB at 4.4 GHz with a thickness of 8.5 mm and the effective absorption bandwidth (R L < −10 dB) was 3.2 GHz. On the contrary, when x > 0.04, the magnetic loss ability decreases rapidly (e.g., Ms decreases from 82.47 emu/g to 59.77 emu/g). Meanwhile, the dielectric loss increases slowly and the microwave absorption capacity decreases.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lian Xue,Ying Shi,Cunping Huang,Qiang Wu,Bingbing Chen,Weifeng Yao
Effective and affordable photocatalysts play an important role in the cost reduction of solar hydrogen production through photocatalytic water splitting. In this research, a Zn 2+ and Ni 2+ modified carbon hydrogen evolution cocatalyst (ZnNi-C) were synthesized and immobilized onto the surface of CdS (CdS@ZnNi-C) for photocatalytic hydrogen evolution (PHE). The preparation used an ethylenediaminetetraacetic acid disodium (EDTA)-assisted method. The hydrogen evolution rate and apparent quantum efficiency (AQE) at 420 nm for an optimized CdS@ZnNi-C photocatalyst are15.7 mmol/h/g and 31.4 %, respectively. The rate is 2.4 times and 3.7 times greater than those of Zn 2+ and Ni 2+ modified carbon cocatalysts (Zn-C) and (Ni-C) on CdS (CdS@Zn-C) and (CdS@Ni-C), respectively. Density functional theory calculations indicate that the elevated catalytic performance of CdS@ZnNi-C is due to the co-anchored Zn 2+ and Ni 2+ in carbon layers that lead to a favorable Gibbs free energy (ΔG H *) for hydrogen evolution. This approach is valuable for the design of stable and efficient photocatalysts for renewable hydrogen production.
研究领域:
材料科学
·
可再生能源
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Shuai Li,Chen Li,Minmin Mao,Kaixin Song,Yaseen Iqbal,Amir Khesro,Sinan S. Faouri,Zhilun Lu,Bing Liu,Shikuan Sun,Dawei Wang
In this work, Zn-Ni co-modified LiMg 0.9 Zn 0.1- x Ni x PO 4 ( x = 0–0.1) microwave dielectric ceramics were fabricated using a solid state synthesis route. Rietveld refinement of the XRD data revealed that all ceramic samples have formed a single phase with olivine structure. SEM images showed that the samples have a dense microstructure, that agrees with the measured relative density of 97.73 %. Based on the complex chemical bond theory, Raman and infrared reflectance spectra, we postulate that ε r is mainly affected by the ionic polarizability, lattice and bond energy, while P-O bond plays a decisive role in Q×f and τ f value. Optimum properties of Q×f ~ 153,500 GHz, ε r ~ 7.13 and τ f ~ −59 ppm/°C were achieved for the composition LiMg 0.9 Zn 0.06 Ni 0.04 PO 4 sintered at 875 ℃ for 2 h. This set of properties makes these ceramics an excellent candidate for LTCC , wave-guide filters and antennas for 5 G/6 G communication applications.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 9
·3308-3319
·
IF 3.269
Qiang Jia,Yinxian Peng,Jianming Pan,Xiaobin Huang,Xiangheng Niu,Tao Zhang
Magnetic microspheres (Fe3O4@PVIM@Zn(II)) composed of a high magnetic-response Fe3O4 core and a Zn(II)-immobilized cross-linked polyvinyl imidazole (PVIM) shell via reflux-precipitation polymerization and metal-ion affinity strategy were fabricated. Integrating the advantages of specific uptake and fast separation, Fe3O4@PVIM@Zn(II) was adopted as an ideal pathway for luteolin (LTL) recognition. As-prepared Fe3O4@PVIM@Zn(II) possessed core–shell structure, uniform size (200 nm), high magnetic responsiveness (32.6 emu g−1), and a very easy synthesis process. X-ray photoelectron spectroscopy (XPS) suggested a strong interaction between the nitrogen heterocyclic ring of PVIM and Zn(II), which produced abundant binding sites for LTL. The batch mode experiments can be well described by pseudo-first-order kinetic models and a Langmuir isotherm. A rapid binding equilibrium (within 45 min) and large monolayer adsorption capacity (23.92 mg g−1) at 298 K were also observed. In addition, Fe3O4@PVIM@Zn(II) displayed remarkable selectivity to LTL; the purification process using Fe3O4@PVIM@Zn(II) can make purified LTL from approximately 85% to 94.26%. The antibacterial activity of purified LTL was outstanding by means of a Staphylococcus aureus (ATCC29213) resistance experiment. Considering its multiple merits, Fe3O4@PVIM@Zn(II) exhibited great potential for specific binding with natural products, such as flavonoids.
研究领域:
材料科学
·
生物化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 10
·7138-7149
·
IF 2.993
Liang Zhen,Zhang Xiaojun
In this article, TiO 2 -modified ZnO nanotube arrays (NTAs) are successfully synthesized and used to prepare a nonenzymatic biosensor for the detection of glucose and hydrazine hydrate. In brief, the ZnO@TiO 2 NTAs are synthesized on zinc foil by two steps of simple hydrothermal method. Therefore, it can be directly used as a working electrode and is not needed to be modified to other electrode surface by any means to form a sensor. In the oxidation of glucose and reduction reaction of hydrazine hydrate, it exhibits excellent electrocatalytic performance. Moreover, it has high sensitivity, a fast response time (less than 3 s), and a detection limit as low as 0.5 μM (S/N = 3) toward glucose and hydrazine hydrate respectively. In the selectivity of the target analyte, the Zn–ZnO@TiO 2 nanocomposite electrode can effectively resist the influence of different interferent, including uric acid, dopamine, and l -cysteine.
研究领域:
材料科学
·
分析化学
·
生物传感技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 4
·1-13
·
IF 2.8
Wang Hanxiao,Zhang Hong,Li Mei,Zhang You,Li Zhicheng,Leng Senlin
NTC thermistors have broad application prospects, and low-temperature sintering of NTC thermistors is of great significance in reducing sintering costs and is beneficial for preparing multi-layer structured components with lower cost internal electrode conductors. In this work, a low-melting point compound basing on Y 2 Ba 2 Cu 2 O 7 is selected as sintering agent for the preparation of Li-doped Ni–Zn–O (Ni 0.97- x Zn x Li 0.03 O 2 , x = 0.1, 0.3, 0.5, 0.7) ceramic thermistors. The sintering temperature can be reduced by more than 250 °C comparing with the one of the related ceramics without sintering aid (NiO ceramics was sintered at 1400 °C). The fabricated Li-doped Ni–Zn–O ceramics consist of single salt-rock NiO phase for x ≤ 0.3 and are composed of NiO-rich and ZnO-rich phases for x = 0.5 or 0.7. All ceramics show typical NTC characteristics with a wide-range adjustable material constant ( B values ranging from 756 to 4967 K). The Ni–Zn–O ceramics have high aging stability with the resistance shift rates induced at 125 °C lower than 1.89%. The microstructure, conduction modes and aging mechanism were investigated using the XRD, SEM, XPS, and electrochemistry impedance spectra.
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
THIN SOLID FILMS
·
2018
·
IF 1.939
Hao Li,Sirong Yu,Jinhui Hu,Enyang Liu
In this research, a simple and economical method was used to fabricate a superhydrophobic Zn coating with ZnO nanosheets on steel substrates. Electrodeposited Zn coating was firstly formed on the steel substrate for anti-corrosion. Then we used hydrothermal method to process the electrodeposited Zn coating for in-situ growth of ZnO nanosheets. After low-energy modification with pentadecafluorooctanoic acid, the Zn coating with ZnO nanosheets on the steel substrate became superhydrophobicity, with water contact angle of 158° and the sliding angle of about 6°. The prepared superhydrophobic Zn coating with ZnO nanosheets exhibited good stability and excellent self-cleaning property. As a result, this combination method could be utilized in large scale production due to its simplicity and low-cost.
研究领域:
材料科学
·
表面工程
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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）