JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Jing-Feng Li,Yibo Chen,Zhu Wang,Zhao-Qing Liu
In spite of recent progress in developing hollow micro/nanostructures, the synthesis of three-dimensional adsorbents with high adsorption efficiency and capability on the basis of these structures still remains a great challenge. Herein, we demonstrate a facile hydrothermal strategy to synthesize uniformly dispersed hollow CuWO 4 spheres. The as-prepared CuWO 4 spheres with unique mesoporous structure show favorable selective adsorption for cationic dyes and good recyclability. The adsorption capacity of hollow CuWO 4 towards methylene blue (MB) reaches 59.82 mg g −1 . Furthermore, the hollow CuWO 4 spheres present enhanced photoelectrochemical performance under visible light illumination. This strategy of acquiring specifically functionalized materials from smart design and simple chemical process has opened up wide opportunities on the fabrication of alternative absorbents and photoelectrodes based on CuWO 4 substrate.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2022
·
IF 8.663
Wei Weng,Gaozhan Liu,Yunming Li,Lin Shen,Xiayin Yao
Development of sodium solid electrolytes with high ionic conductivity and good interface stability towards Na metal plays a dominant role in achieving stable all-solid-state sodium batteries. Herein, WS 2 -doped Na 3- x Sb 1- x W x S 4 and WO 2 -doped Na 3- x Sb 1- x W x S 4–2 x O 2 x ( x = 0.025, 0.05, 0.075, 0.1) solid electrolytes are successfully synthesized by melt-quenching method followed by an annealing procedure. Compared with 0.98 mS cm −1 for pristine Na 3 SbS 4 , the dramatically enhanced room temperature ionic conductivities of 10.37 and 8.49 mS cm −1 are achieved for Na 2.95 Sb 0.95 W 0.05 S 4 and Na 2.95 Sb 0.95 W 0.05 S 3.9 O 0.1 , respectively. In addition, it is found that the introduction of oxygen in Na 3 SbS 4 through W and O co-doping can alleviate the deteriorative Na/solid electrolyte interface induced by W substitution. The modified interface stability is demonstrated by the suppressed increase of Na plating/striping voltage and impedance for the symmetric Na/Na 2.95 Sb 0.95 W 0.05 S 3.9 O 0.1 /Na cells. Moreover, in contrast with rapid capacity decay for TiS 2 /Na 2.95 Sb 0.95 W 0.05 S 4 /Na battery, the batteries employing Na 2.95 Sb 0.95 W 0.05 S 3.9 O 0.1 exhibit stable cyclic performance and good rate capability. This work provides a W and O co-doping strategy for preparing Na 3 SbS 4 solid electrolytes with simultaneously enhanced ionic conductivity and interface stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Yi-heng Zhang,Lin Zhu,Xin Guo,Wen-jing Zhang,Xiang Shao,Ji Yang
The treatment of livestock wastewater is a major environmental challenge due to the presence of antibiotics from animal excreta, which may pass through conventional biological oxidation treatment and pose a threat to public health. Electro-oxidation method presents an opportunity to remove antibiotics in the livestock wastewater at the source of generation, and titanium-based IrO 2 anode has been shown to have excellent electro-catalytic activity and stability. However, the soaring price of iridium limits the practical application. In this work, we showed that W, Ti-doped IrO 2 anodes largely preserved the electro-catalytic activity while reducing the cost of electrode fabrication. The prepared Ti/Sb-SnO 2 /(Ir 0.6 W 0.2 Ti 0.2 )O x anode was shown to achieve 94 % conversion of sulfadiazine in 1 min and 100 % conversion in 15 min. Additionally, complete removal of chemical oxygen demand (COD 0 = 700–800 mg/L) was achieved in 1–3 h of electrolysis at 40 mA/cm 2 . Chlorine-mediated oxidation was demonstrated to be the main mechanism for organic contaminant degradation. The COD removal during galvanostatic electrolysis exhibited zero-order kinetics, indicating that the reaction rate was controlled by the heterogeneous reaction at the anode surface. In the stability test, >95 % COD removal was maintained after 5 cycles of electro-oxidation experiments. The accelerated life of the anode was tested to be 352 h (1000 mA/cm 2 , 1 M H 2 SO 4 electrolyte, 60 °C).
研究领域:
环境科学
·
水处理工程
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电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2020
·
IF 3.407
Y. Jiang,J. Hou,P. Huang,J. Li,E.H. Wu,Z. Xu,Q.S. Liu,Zhuoming Xie,Qianfeng Fang
Hybrid tungsten composites reinforced with zirconium carbide (ZrC) nanoparticles and tungsten fibers were developed by the conventional powder metallurgy process (ball-mill mixing of powders and fibers followed by spark plasma sintering). The synergistic and mutual influences of the fibers and nanoparticles on tungsten were investigated in tensile behavior and fracture-energy tests. Aided by the ZrC nanoparticles, up to 30% of the fibers could be embedded in the tungsten matrix. The fracture energy was maximized by co-introducing 0.2 wt% ZrC particles with 20 wt% short tungsten fibers. The fracture-energy enhancement of the short fibers is contributed by pseudo-toughness from the fiber–matrix interface, inherent toughness from the fibers themselves, and grain refinement (by 50%) of the tungsten matrix. The fracture energy of the composite is very sensitive to the ZrC content, because the two-way action of ZrC weakens the pseudo-toughness of the interface energy.
研究领域:
材料科学
·
力学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 35
·15428-15435
·
IF 2.7
Shephrah Olubusola Ogungbesan,Onome Ejeromedoghene,Yanina Moglie,Eduardo Buxaderas,Bingbing Cui,Rosemary Anwuli Adedokun,Mulenga Kalulu,Mopelola Abidemi Idowu,David Díaz Díaz,Guodong Fu
In this work, hydrothermal methods and deep eutectic solvents were combined for the first time to prepare tungsten trioxide nanoparticles in an easy and green manner improving their optical and photochromic properties. Characterization of the synthesized nanoparticles was performed via Fourier transform infrared spectroscopy, X-ray diffraction, ultraviolet visible spectroscopy, scanning electron microscopy, energy dispersive X-ray, transform electron microscopy, dynamic light scattering, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The average size of the spherical nanoparticles was ca. 1.83 nm as shown by TEM, and the nanoparticles exhibited high thermostability at least until 900 °C, and photostability and photosensitivity when they were exposed to UV light. Additionally, synthesized tungsten trioxide nanoparticles were found to be nontoxic with maximum cell viability observed even at 100 μg mL−1, making them potential candidates for biomedical applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2017
·Vol. 122
·期 1
·357-367
·
IF 1.264
Wu Shuxiang,Wang Wenhang,Fang Yuzhen,Kong Xiangjin,Liu Junhai
Silicotungstic acid (STA) modified ZIF-8 catalyst was developed by simple impregnation method for Friedel–Craft acylation reaction. The best performance was observed on 20 wt% STA/ZIF-8, over which conversion of anisole and selectivity towards p-benzoylanisole reached 99.2 and 93.5%, respectively. N 2 physisorption, XRD, FT-IR, TGA and Pyridine FT-IR characterizations indicated that introduction of STA to ZIF-8 did not change its main structure but increased its acid site density, which promised enhanced catalytic performance of the obtained catalyst. Moreover, the performance of the catalyst was further proved through a series of substrates with electron donor or withdraw substitution group, since all of substrates could be converted to corresponding p-isomer effectively.
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Min Yang,Lin Li,Li Ma,Bohui Wei,Chenzhong Yao,Jun Li
Tungsten oxide (WO 3 ) has been considered as an fascinating candidate for supercapacitors (SCs) material because of its desirable physico-chemical properties and electrochemical behaviors. Nevertheless, it is still a significant challenge to enhance its electrochemical properties and stability. Herein, we report an electroreduction strategy to fabricate the macroporous defective tungsten oxide nanostructure (ER-WO 3 ) as a negative electrode material with outstanding electrochemical behavior and remarkable cycling durability in 5 M LiCl aqueous electrolyte, which attributes to the introduction of oxygen deficiencies. The ER-WO 3 electrode exhibits a large areal capacitance of 244.7 mF cm −2 and an ultrahigh gravimetric specific capacitance of 266.6 F g −1 at scan rate of 50 mV s −1 . More importantly, the ER-WO 3 product also delivers an ultralong cyclic stability with 97.4% capacitance retention after 5000 cycles. Such these optimized properties of the ER-WO 3 nanostructure electrode will promote its applications in the field of science and technology.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Ying Tang,Mingyang Yu,Zhiwei Zhang,Junqi Chen,Huaicheng Xiang,Xianran Xing,Liang Fang
Microwave dielectrics sintered at low temperature are pursued for energy saving and cofiring with cost-effective metallic electrodes (e.g. Cu, Ag and Al). In this study, a novel tungstate low-firing microwave dielectric ceramic , Li3Nd3W2O12, which can realise co-firing with Ag electrode at 940 °C, was synthesised by the conventional solid-state reaction method. According to the X-ray diffraction and Rietveld refinement results, Li3Nd3W2O12 crystallised in the garnet structure with a space group of Ia 3 ¯ d and W 6+ cations fully occupying the octahedral-coordinated site. The optimum microwave dielectric properties with permittivity of ∼9.8, quality factor of ∼36,800 GHz and temperature coefficient of resonant frequency of ∼ –30 ppm/°C were obtained after sintered at 940 °C. A near-zero temperature coefficient of resonant frequency of +3.6 ppm/°C was achieved in 0.96Li3Nd3W2O12-0.04CaTiO 3 ceramics. These properties make tungstate Li3Nd3W2O12 a promising candidate for low-temperature co-fired ceramic technology.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Dong Li,Siyu Tian,Qiuhua Qian,Caiyun Gao,Hongfang Shen,Fei Han
A nitrogen-doped tungsten oxide/BiVO4 (N-WO3/BiVO4) heterojunction structure was obtained utilizing ammonium paratungstate as the nitrogen source and Bi(NO3)3·5H2O as the bismuth source, exhibiting promising photoelectrochemical (PEC) performances and effectively obtaining a long photoresponse range into the visible light region. Notably, the UV–vis diffuse reflectance spectra of N-WO3/BiVO4 (566 nm, 2.19 eV) exhibited a notable red shift of the absorption edge compared to that of WO3/BiVO4 (516 nm, 2.47 eV). The N-WO3/BiVO4 photoanode demonstrated an excellent photocurrent density of 0.78 mA cm–2 at 0.68 V vs Ag/AgCl, which surpassed those of the WO3/BiVO4 (0.20 mA cm–2), pure WO3 (0.25 mA cm–2), and pure BiVO4 (0.03 mA cm–2) photoelectrodes. The improvement of the PEC performances was primarily due to the synergy of N doping and the involved heterojunction structure, suggesting that N doping increased the Vis-light response and the heterojunction structure promoted charge separation to improve the lifetime of photoinduced carriers.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Quan Peng,Yan Li,Ming Qiu,Benbing Shi,Xueyi He,Chunyang Fan,Xunli Mao,Hong Wu,Zhongyi Jiang
Constructing long-range proton-transfer pathways with sufficient conducting sites in proton exchange membranes (PEMs) is vital for proton conduction. Herein, phosphotungstic-acid-coupled graphene oxide (HPW@mGO) is prepared by grafting imidazolium ionic liquids (IMILs) on GO nanosheets, followed by loading with HPW via the electrostatic interaction. HPW@mGO nanosheets are then integrated into polymers to prepare sulfonated aromatic poly(ether ether ketone) (SPEEK)/HPW@mGO nanohybrid membranes. The proton conductivities of the nanohybrid membranes under various humidity conditions are enhanced significantly due to the distinct proton conduction behavior of HPW and IMILs as well as the long-range two-dimensional (2D) interfacial ionic pathways. Specifically, the SPEEK/HPW@mGO-4 membrane achieves a maximum proton conductivity of 5.0 × 10–3 S cm–1 at 65 °C and 40% RH, about 32.3 times that of the pristine SPEEK membrane. Meanwhile, the SPEEK/HPW@mGO-4 membrane shows a 108% increment of the maximum power density. The results demonstrate that 2D materials with long-range ionic pathways are promising fillers for proton transfer.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Weiming Wu,Xiao-Yuan Wu,Sa-Sa Wang,Can-Zhong Lu
H 2 and O 2 were produced at separate times from water electrolysis by using silicotungstic acid as an electron-coupled-proton buffer. It was found that the redox property of silicotungstic acid in water could be regulate by the introduction of organic solvents (acetonitrile, DMF and ethanol). The redox wave of silicotungstic acid at ∼0.02 V vs. RHE moved in the negative direction, which was good for the production of hydrogen. A high yield of hydrogen (∼85%) was obtained in a water-ethanol system (V/V = 1:1), which was higher than that in water (∼45%). And the introduction of ethanol didn’t affect the rate of hydrogen evolution. Moreover, the semihydrogenation of organic compounds could be achieved in the present system under mild conditions. The conversion of phenylacetylene and acetophenone are 97% and 80% under optimum reaction conditions, while the selectivity of styrene and 1-phenylethanol are 80% and 82%, respectively.
研究领域:
化学
·
催化科学
·
能源科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Liang Xu,Xiao-Fang Wang,Bin Liu,Ting Sun,Xin Wang
The composites ferrous tungstate (FeWO 4 ) were fabricated as the sonocatalyst for degradation of meloxicam (MEL) in water. The composites are prepared carefully via hydrothermal reaction of sodium tungstate dehydrate and ferrous ammonium sulfate hexahydrate. The morphology of FeWO 4 were controlled successfully, by adjusting the acidity of the reaction solution (pH = 5, 6, 7, 8, 9). Multiple characterization results revealed that the obtained FeWO 4 shared the similar nano-microspheres structure, but with different BET surface area and energy gap. The sonocatalytic experiments showed that FeWO 4 nanomaterials with various synthetic pH values had different sonocatalytic performance on degradation of meloxicam (MEL), and FeWO 4 synthesized at pH 6 reaches maximum of 73.5% on degradation of MEL. This phenomenon was not only due to the moderate BET surface area (31.18 m 2 /g), moderate pore size distribution (10–30 nm) and moderate energy gap (1.73 eV) of FeWO 4 nano-microspheres, ·OH and holes also played a key role in the removal of MEL. The obtained catalyst was proved to be stable enough after four cycles. Our study demonstrates a novel finding, not reported previously, that FeWO 4 could be utilized as a promising sonocatalyst to degrade MEL by ultrasound-driven.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）