JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 24
·22028-22038
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IF 2.22
Peng Qirui,Yang Lu,Zhao Qiuying,Ma Yizhou,Ji Hongli,Qiu Jinhao
The development of piezoelectric polymers with superior electromechanical performance is a demand in the areas of flexible sensors, actuators and tissue engineering, among others. In this work, we reported a novel sandwich-structured piezoelectric composites comprising of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and Prussian blue analogs Co 3 [Co(CN) 6 ] 2 with excellent electromechanical activities. The large specific surface area, unique three-dimensional porous nanostructure and redox behavior of Co 3 [Co(CN) 6 ] 2 appeared to significantly promote the interfacial coupling effect within P(VDF-HFP), resulting in enhanced electromechanical response. Moreover, the sandwich structure topological design would enlarge the interfacial coupling effect, strengthen the breakdown strength and consequently raise the electromechanical performance. For instance, a maximum piezoelectric coefficient d 33 of ~ 41 pC/N can be achieved in the sandwiched composites at a loading of 0.8 wt%, which is 1.78 times that of pure P(VDF-HFP). Furthermore, the sandwiched composites possess superior electromechanical coupling factor k 33 up to 0.215, while that of pure P(VDF-HFP) is only 0.134.
研究领域:
材料科学
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柔性电子
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传感器技术
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Gang Wu,Shasha Liu,Jie Ren,Jiawei Zhu,Yun Yu,Suzana Yusup,Dengyu Chen,Shu Zhang,Yong Huang
The development of efficient and recyclable heterogeneous catalysts for the catalytic conversion of cellulose into high-value platform chemicals has garnered significant attention. Cobalt sulfide, recognized for its earth-abundance and recyclability, has emerged as a promising catalyst for the production of methyl levulinate (ML) from cellulose, albeit with a noted disparity in catalytic performance when compared to conventional homogeneous catalysts. In this study, various phosphorus-doped cobalt sulfides (CoS x P 2-x ) were employed to enhance the production of ML from cellulose, with a particular focus on the sulfide-phosphorus ratio. Notably, an optimal ML yield of 48.9 wt% and a complete conversion of cellulose were achieved at a sulfide-to-phosphorus ratio of 1:1. Comprehensive characterization of the synthesized CoS x P 2-x materials revealed that CoS 1.00 P 1.00 exhibited distinctive properties, such as the presence of ternary acid sites and the lowest Co 3+ /Co 2+ ratio among the series. Density functional theory (DFT) calculations elucidated that the bound electrons within the P-Co bonds were activated by the synergistic effects among Co, P, and S atoms, thereby diminishing the free energy barrier for the adsorption of reaction intermediates.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Bin He,Huanhuan Liu,Zheng Lin,Lei Yan,Jiqiang Ning,Yijun Zhong,Changcheng Zheng,Ziyang Zhang,Yong Hu
The practical application of photocatalytic water splitting is essentially limited by the slow kinetic nature of the water oxidation process. Therefore, it is highly desirable but challenging to explore a low-cost and high-efficiency water oxidation catalyst for the aim of commercialization and industrialization. We herein report the first-time synthesis of a novel and high-efficiency visible-light-driven photocatalyst composed of flower-like Co(CO 3 ) 0.5 (OH)·0.11H 2 O (CCO) nanowires and Bi 2 WO 6 (BWO) nanosheets, i.e. CCO/BWO nanocomposite, via a facile hydrothermal method. Without utilizing any additional cocatalyst, the composite of CCO/BWO in 30% weight ratio exhibits extraordinarily high photoactivity and photostability towards O 2 evolution, achieving an average O 2 generation rate of 953 µmol h −1 g −1 under visible-light irradiation (λ > 420 nm).
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·
IF 3.205
Jianmin Chen,Qilu Yao,Jia Zhu,Xiangshu Chen,Zhang-Hui Lu
Bimetallic Rh–Ni nanoparticles (NPs) immobilized on the cerium hydroxide carbonate (Ce(OH)CO 3 ) have been successfully prepared by a facile co-reduction route, and characterized by XRD , SEM , TEM , EDX, ICP , XPS , and TG-DTA. The as-synthesized Rh–Ni/Ce(OH)CO 3 nanocomposites (NCs) with different metal compositions were applied as the highly efficient catalysts for hydrogen generation from the alkaline solution of hydrazine (N 2 H 4 ). Especially, the Rh 55 Ni 45 /Ce(OH)CO 3 NCs exerted the highly activity and 100% H 2 selectivity for the decomposition of hydrazine, providing high turnover frequency (TOF) values of 150 h −1 at 30 °C and 395 h −1 at 50 °C, respectively, relative high values for the metal catalysts . The activation energy for the decomposition of hydrazine catalyzed by Rh 55 Ni 45 /Ce(OH)CO 3 NCs was measured to be 38.8 kJ/mol, lower than most of the values reported for this reaction using many different catalysts. This excellent catalytic performance could be attributed to not only the strain and ligand effects between Rh and Ni, but also the strong interaction between RhNi NPs and Ce(OH)CO 3 support. Such a highly catalyst may greatly encourage the practical application of hydrazine as a hydrogen storage material.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Hui-Min Zhao,Wei-Peng Jia,Rui Dang,Xiang-Rong Ma,Yang Ma,Shuang-Yu Li,Xin Han,Nai-Cai Xu,Yu-Hong Kang,Yong Gao,Hua-Rui Hao,Rui Bai,Zhi-Fang Zhang,Cui-Ying Lu
s The development of a new type of photocatalyst for multiple deep degradation of phenol in wastewater together with the elucidation of the method for this process are highly significant in the treatment of sewage. In this report, three-dimensional heterostructured La(OH)CO 3 /NiAl-LDHs composite catalysts were prepared by loading ultrathin NiAl-LDHs onto La(OH)CO 3 substrates using a hydrothermal synthesis method and an in-situ growth technique. Photocatalytic experimental studies showed that La(OH)CO 3 /NiAl-LDHs could remove up to 97 % of (degrade) phenol from water, which was 5.86 and nearly two-fold greater than pure NiAl-LDHs and La(OH)CO 3 . Even after 5 cycles, La(OH)CO 3 /NiAl-LDHs still sustains an excellent photocatalytic stability (93.6 % phenol degradation). Fabrication of ultrathin NiAl-LDHs greatly enhanced the surface expanse of the composites from 1.442 m 2 /g to 140.16 m 2 /g, exposing more active sites. According to the in-situ XPS analysis under irradiation and the capture of active species on La(OH)CO 3 /NiAl-LDHs, the electrons would be transferred from La(OH)CO 3 to ultrathin NiAl-LDHs. The S-type heterointerfaces formed at the La(OH)CO 3 substrate with ultrathin NiAl-LDHs nanosheets effectively inhibited carrier complexation and improved the catalytic performance. Meanwhile, the formation of oxygen vacancies between La(OH)CO 3 and NiAl-LDHs further enhanced the photocatalytic activity. The photocatalytic degradation mechanism of phenol showed that the main radicals of this catalytic reaction were •O 2 - and •OH. The three-dimensional stratified staging engaged with La(OH)CO 3 and the ultrathin NiAl-LDHs mixed nanosheet faces offered a new path to advance superlative catalysts to treat sewage.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 28
·期 6
·e202103601
·
IF 5.236
Jiaxin Wang,Xiaoliang Sun,Hanbin Hu,Tianyang Shen,Guihao Liu,Zewei Li,Dongwei Cao,Lei He,Yu-Fei Song
Graphical Defective but efficient : The binder-free Ni(Co 0.5 Fe 0.5 )/NF, with a unique nanoarray structural feature, was fabricated as a high-efficiency electrocatalyst towards oxygen evolution reaction (OER). Ni(Co 0.5 Fe 0.5 )/NF showed the optimized electronic structure and exposed more defects than Ni(Co 0.5 Fe 0.5 )-bulk and Ni(Co 0.5 Fe 0.5 )-mono prepared by traditional coprecipitation method. As a result, the as-prepared Ni(Co 0.5 Fe 0.5 )/NF demonstrated excellent electrochemical activity with an overpotential of 209 mV for OER at 10 mA cm −2 . The low-cost, high-abundance and durable layered double hydroxides (LDHs) have been considered as promising electrocatalysts for oxygen evolution reaction (OER). However, the easy agglomeration of lamellar LDHs in the aqueous phase limits their practical applications. Herein, a series of ternary NiCoFe LDHs were successfully fabricated on nickel foam (NF) via a simple electrodeposition method. The as-prepared Ni(Co 0.5 Fe 0.5 )/NF displayed an unique nanoarray structural feature. It showed an OER overpotential of 209 mV at a current density of 10 mA cm −2 in alkaline solution, which was superior to most systems reported so far. As evidenced by the XPS and XAFS results, such excellent performance of Ni(Co 0.5 Fe 0.5 )/NF was attributed to the higher Co 3+ /Co 2+ ratio and more defects exposed, comparing with Ni(Co 0.5 Fe 0.5 )-bulk and Ni(Co 0.5 Fe 0.5 )-mono LDHs prepared by conventional coprecipitation method. Furthermore, the ratio of Co to Fe could significantly tune the Co electronic structure of Ni(Co x Fe 1-x )/NF composites ( x =0.25, 0.50 and 0.75) and affect the electrocatalytic activity for OER, in which Ni(Co 0.5 Fe 0.5 )/NF showed the lowest energy barrier for OER rate-determining step (from O* to OOH*). This work proposes a facile method to develop high-efficiency OER electrocatalysts.
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
Molecular Catalysis
·
2023
·
IF 4.6
Jiahao Chen,Yiqing Zeng,Shule Zhang,Zhaoxiang Zhong,Qin Zhong
Interface interaction existed in the multicomponent determines the catalytic performance of composite catalysts. Herein, a Co 3 O 4 -LaCoO 3 (Co-La) composite catalyst with strong spinel-perovskite interface interaction was successfully synthesized via a one-pot sol-gel method for the catalytic oxidation of toluene. The activity test results showed that the optimal 1Co 3 O 4 –4LaCoO 3 (1Co-4La) catalyst exhibits much higher catalytic activity (T 90 = 215 °C, GHSV = 50,000 h −1 ) than Co 3 O 4 (T 90 = 295 °C), LaCoO 3 (T 90 = 256 °C) and 1Co 3 O 4 /4LaCoO 3 (1Co/4La) (prepared by mechanical ball-milling, T 90 = 285 °C). Characterizations revealed that the strong spinel-perovskite interface interaction generated between the Co 3 O 4 spinel and LaCoO 3 perovskite in 1Co-4La facilitates the transfer of interfacial electrons, contributing to the exposure of surface active Co 3+ and the enhanced oxidation ability of surface active Co 3+ on 1Co-4La. In addition, the reactive lattice oxygen of surface Co 3+ –O on 1Co-4La effectively promotes the decomposition of toluene into CO 2 , enabling the low-temperature oxidation of toluene through the Mars-van Krevelen (MvK) mechanism. This work provides insight into the promotional effect of multicomponent interface interaction on enhancing catalytic performance of spinel-perovskite composite catalysts.
研究领域:
催化化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Songbo Tan,Peipei Jiang,Jun Liu,Xuan Yang,Yifeng Lai,Xiaowei Hu,Guowen Peng,Guohui Wang
With the increasing complexity of radiation environments, the development of effective shielding materials against 222 Rn and gamma radiation is critical for ensuring human health and safety. This study utilized a two-step hydrothermal method to synthesize Gd₂O(CO₃)₂@bismuth-based metal–organic frameworks (Bi-MOFs)/graphene nanoplatelets (GBG) composite fillers, followed by melt blending and hot-press molding to develop GBG/polymethyl methacrylate (PMMA) composites aimed at shielding against 222 Rn and gamma radiation. The successful synthesis and structural integrity of the composites were confirmed using various characterization techniques, including x-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive x-ray spectroscopy. The experimental results indicate that the GBG composite filler exhibits superior enhancement in 222 Rn shielding capabilities, with the 222 Rn diffusion coefficient of GBG/PMMA-20 composites reduced to 1.41 × 10 −13 m 2 /s, a 98.6% decrease compared to pure PMMA (1.04 × 10 −11 m 2 /s). Furthermore, the GBG demonstrates outstanding improvements in gamma-ray shielding performance, with the mass attenuation coefficient of GBG/PMMA-50 reaching 2.70 cm 2 /g for 59.5 keV gamma rays, nearly 16 times higher than that of pure PMMA (0.16 cm 2 /g). Additionally, thermogravimetric analysis revealed that the introduction of GBG fillers significantly improves the thermal stability of the PMMA composites. This work could offer an innovative approach to the design of 222 Rn and gamma radiation shielding materials. Highlights Developed a novel composite for enhanced 222 Rn and gamma radiation shielding. Introduced Gd-based fillers to enhance gamma radiation attenuation in PMMA composites. Achieved superior thermal stability in PMMA composites compared to pure PMMA. Materials designed for application in high-radiation environments, including mining.
研究领域:
材料科学
·
辐射防护
·
复合材料
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2013
·Vol. 37
·期 10
·3024-3029
·
IF 2.966
Yinhua Jin,Jianhua Liu,Quan Zheng,Jun Xu,Bhoj Raj Sharma,Guilin He,Min Yan,Lin Zhang,Yang Song,Tao Li,Qinghai Yuan,Yong Sun,Haishan Yang
Molecular imaging techniques have shown increasing potential in the definition and imaging of the structure and function of biological systems for preclinical applications. Herein, we report a high-quality dual-modal imaging platform based on water-stable gadolinium-doped Yb(OH)CO3 nanoparticles. These nanoprobes were prepared via a one-pot method, meeting the criteria for a biomedical material. Compared with iobitridol, which is routinely used in clinical applications, our Yb(OH)CO3:Gd nanoparticles provided greatly enhanced contrast at regularly used clinical voltages. By virtue of their doping with gadolinium, these well-designed nanostructures could also be applied as an excellent MRI nanoprobe, which provided similar biodistribution results with our CT experiments. Detailed in vitro and in vivo toxicological study indicated that the uniformly sized nanoparticles possessed high biocompatibility and also low toxicity, making them safe for clinical use. The concept presented here shows great potential for the design and synthesis of nanoprobes with high imaging efficiency and low systemic toxicity.
研究领域:
生物医学工程
·
分子影像学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2020
·Vol. 10
·期 25
·2000892
·
IF 25.245
Yongchao Tang,Xuejin Li,Haiming Lv,Dong Xie,Wenlong Wang,Chunyi Zhi,Hongfei Li
In aqueous alkaline Zn batteries (AZBs), the Co 3+ /Co 4+ redox pair offers a higher voltage plateau than its Co 2+ /Co 3+ counterpart. However, related studies are scarce, due to two challenges: the Co 3+ /Co 4+ redox pair is more difficult to activate than Co 2+ /Co 3+ ; once activated, the Co 3+ /Co 4+ redox pair is unstable, owing to the rapid reduction of surplus Co 3+ to Co 2+ . Herein, CoSe 2− x is employed as a cathode material in AZBs. Electrochemical analysis recognizes the principal contributions of the Co 3+ /Co 4+ redox pair to the capacity and voltage plateau. Mechanistic studies reveal that CoSe 2− x initially undergoes a phase transformation to derived Co x O y Se z , which has not been observed in other Zn//cobalt oxide batteries. The Se doping effect is conducive to sustaining abundant and stable Co 3+ species in Co x O y Se z . As a result, the battery achieves a 10 000-cycle ultralong lifespan with 0.02% cycle −1 capacity decay, a 1.9-V voltage plateau, and an immense areal specific capacity compared to its low-valence oxide counterparts. When used in a quasi-solid-state electrolyte, as-assembled AZB delivers 4200 cycles and excellent tailorability, a promising result for wearable applications. The presented effective strategy for obtaining long-cyclability cathodes via a phase transformation-induced heteroatom doping effect may promote high-valence metal species mediation toward highly stable electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Weizhen Zhang,Rui Zhao,Bing Bao,Shuang Liu,Chao Hu,Wei Ding,Huaili Zheng
Phosphorus (P) contamination has become a worldwide issue due to its adverse impacts on water security and human health. Additional research is required because the selectivity and adsorption capacity of P adsorbents continue to impede their practical application. Herein, a novel NaCe(CO 3 ) 2 /Fe 3 O 4 nanocomposite (NCF) with good magnetic properties were synthesized through a modified hydrothermal method for P removal from water. With an adsorption capacity of 86.69 mg P g −1 , the NCF demonstrates outstanding phosphate uptake efficiency. At low P concentrations, the removal rate exceeded 90.0%, and the residual P concentration was below 0.1 mg P L −1 . Notably, NCF demonstrated exceptional P selectivity in actual water containing multiple substances, with negligible interference from competing ions and humic acid (HA). The adsorption processes of NCF were well described by the pseudo-second-order kinetic model (PSO) and Langmuir isotherm model, corresponding to its kinetics and thermodynamics, respectively. The exhausted NCF can be regenerated and retain an effective phosphorus removal capability even after regeneration. Characterization results demonstrated that electrostatic attraction and ligand exchange were responsible for P adsorption, forming stable CePO 4 crystals with low solubility. Moreover, the NCF demonstrated some efficacy in removing typical organic and inorganic phosphorus.
研究领域:
环境科学
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材料科学
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水处理技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Song Cheng,Yutao Liu,Xinyi Liu,Changqing Zhu,Jingyang Luo,Jiashun Cao,Fuqiang Liu
Electro-assisted activation of peroxymonosulfate (EA-PMS) by transition metals oxides (TMOs) has been extensively studied for the removal of organic pollutants. Despite TMOs possess considerable activity and affinity to PMS, their poor bulk conductivity still limits the electron exchange during the TM δ/δ+1 redox cycle, especially the efficient reduction of TM δ+1 via cathodic process. In this study, carbon felt loaded with modified Co 3 O 4 nanosheets (Co@FCF) was fabricated and applied as the flow-through electrode of EA-PMS process, where the Co 3 O 4 nanosheets were embedded with numerous metallic Ni particles encapsulated within carbon layers (Ni@C). Driven by weak electric current, continuous electrons can be supplied to the bulk Co 3 O 4 from the electron-rich Ni@C nanoparticles, resulting in accelerated Co 3+ /Co 2+ cycle, enhanced production of SO 4 ·− and improved energy utilization efficiency. Electrochemical tests along with density functional theory calculations indicate that the unique structure of Co@FCF played essential role in the enhanced performance.
研究领域:
环境科学
·
材料科学
✓ 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）