ACS Applied Energy Materials
·
2021
·
IF 6.024
An Chen,Bo Wu,XiaoDong Li,Jinpeng Shen,Lu Tian,Yong Zhou,Chonghua Pei
Thermites are a class of significant energetic materials widely used in aerospace propulsion, explosion, pyrotechnics, thermal batteries, and power generation. Although nanothermites exhibit fast reaction rates and high energy density, micron-sized thermites remain of practical importance over nanothermites due to their low electrostatic discharge (ESD) sensitivity, lower cost, and smaller dead mass. Herein, we develop micron-sized core–shell gallium-based liquid metal-modified Al@Fe2O3 (GLM-Al@Fe2O3), which exhibits high energy density and low laser ignition energy. At an equivalence ratio of 1.3, the differential scanning calorimetry results show that the total heat release of GLM-Al@Fe2O3 reaches 2555 J·g–1, which is much higher than that of the control sample (1424 J·g–1) prepared by a similar process. The density of GLM-Al@Fe2O3 (φ = 1.3) was characterized by a gas pycnometer analyzer, and its volumetric energy density could reach 9.96 kJ·cm–3. Laser-ignited combustion performance of GLM-Al@Fe2O3 was markedly reinforced in terms of the decreased ignition energy. Additionally, the ESD ignition threshold of GLM-Al@Fe2O3 is higher than 1 J, which revealed that the as-prepared GLM-Al@Fe2O3 was insensitive to electrostatic discharge. The facile and efficient strategy in this work provides inspiration to enhance the energy output performance and maintain the ESD safety of micron-sized thermites, which could show great potential in various civilian and military applications.
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DOI
高影响因子
ANALYST
·
2020
·Vol. 146
·期 4
·1295-1302
·
IF 3.978
Defen Feng,Fucun Wei,Yeyu Wu,Xuecai Tan,Fang Li,Yongkuai Lu,Gaochao Fan,Heyou Han
An ultrasensitive electrochemiluminescence (ECL) biosensor was developed based on MIL-53(Al)@CdS QDs and SiO2@AuNPs for trichlorfon detection. Metal–organic frameworks (MOFs) were used as a loading platform that provided a large surface area to load targets and modified materials onto the electrode. At the same time, SiO2@AuNPs loaded plenty of AuNPs which effectively increased the ECL resonance energy transfer between the CdS QDs, so that the ECL signal was strongly quenched and resulted in an amplified response. In the range of 10−11–10−4 M, the ECL response showed a linear relationship with the concentration (logarithm) of trichlorfon, and the detection limit was 5.1 × 10−12 M (S/N = 3). When the biosensor was applied to detect trichlorfon in lettuce, broccoli, cucumber, and chives, the recoveries obtained from the spiked samples were 97%–105%, 102%–104%, 100%–104%, and 98%–104%, respectively. Thus, this novel ECL biosensor has potential applications for the analysis of trichlorfon in food samples.
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PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Jun Wang,Xiaofang Lei,Cong Huang,Lian Xue,Wei Cheng,Qiang Wu
Herein, a novel MoO 3 /Zn–Al LDHs composite photocatalyst was successfully prepared. Morphology, chemical composition, and photoelectrochemical properties of the prepared catalyst were explored by different characterization methods, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), Brunauer Emmett-Teller (BET), UV–Vis diffuse reflectance spectrometry (DRS) and Electron Spin Resonance (ESR). Using tetracycline as a target pollutant, the photocatalytic activity of MoO 3 (10 wt%)/Zn–Al LDHs composite was tested by photodegradation of tetracycline under visible light irradiation. The experimental results indicate that the MoO 3 (10 wt%)/Zn–Al LDHs composite exhibited higher photocatalytic removal efficiency than pure Zn–Al LDHs and MoO 3 . The removal efficiency of TC in 60 min could reach 90.5%. It was confirmed that the optimal conditions were a catalyst dosage of 1.0 g/L, an initial pH of 9, and an initial concentration of TC of 40 mg/L. In addition, a possible mechanism for the photodegradation of TC with MoO 3 (10 wt%)/Zn–Al LDHs composite was proposed. The introduction of MoO 3 facilitates the separation of electron-hole pairs. It could be seen that the MoO 3 (10 wt%)/Zn–Al LDHs composite has great application prospects for the treatment of antibiotic wastewater.
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高影响因子
Journal of Magnesium and Alloys
·
2020
·
IF 7.115
Xin Wang,Chuan Jing,Yuxiang Chen,Xiushuang Wang,Gang Zhao,Xing Zhang,Liang Wu,Xiaoying Liu,Biqin Dong,Yuxin Zhang
Magnesium alloys, the advanced lightweight structural materials, have been successfully applied in the manufacturing field. Unfortunately, their poor corrosion resistance restrains the potential wide applications. In this work, anti-corrosion coatings were fabricated via the in-situ growth of the corrosion inhibitors intercalated magnesium-aluminum layered double hydroxide (Mg–Al LDH) on AZ31 magnesium alloy and then post-sealing it by a super-hydrophobic coating. SEM, XRD, EDS, FTIR, XPS and contact angle test were conducted to analyze physical/chemical features of these coatings. Potentiodynamic polarization curves and electrochemical impedance spectroscopy were recorded to assess the anti-corrosion performance of prepared coatings. Surprisingly, Mg–Al LDH with molybdate intercalation and lauric acid modification achieves the excellent corrosion inhibition performance (99.99%) due to the multicomponent synergistic effect such as the physical protection of Mg–Al LDH, the corrosion inhibition of molybdate and super-hydrophobic properties of lauric acid. This work presents a scientific perspective and novel design philosophy to fabricate the efficient anti-corrosion coating to protect magnesium alloys and then expand their potential applications in other field.
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高影响因子
POLYMER INTERNATIONAL
·
2020
·Vol. 70
·期 1
·123-134
·
IF 2.574
Xiaomu Wen,Keke Chen,Chao Sang,Shen Yuan,Yunjun Luo
Composite solid propellants demand fine and stable mechanical properties, creep resistance and stress relaxation performance during their long storage and usage time. In this study, modified hyperbranched polyester (MHBPE) was prepared and introduced into HTPE/AP/Al/RDX (HTPE, hydroxyl-terminated polyether; AP, ammonium perchlorate; RDX, cyclotrimethylenetrinitramine) solid propellant as an effective additive. The static tensile and dynamic mechanical properties of this propellant before and after the introduction of MHBPE were evaluated. The elevated interfacial interaction by using MHBPE between the binder and RDX fillers improved the toughness and elasticity of the propellant. The enhancement mechanisms were also confirmed by the influence on the fracture surface morphology of the binder which was investigated by SEM. In addition, some influence on the dynamic mechanical properties of HTPE/AP/Al/RDX propellant caused by MHBPE was investigated by dynamic mechanical analysis. The creep behaviors of the HTPE/AP/Al/RDX propellants with and without MHBPE were also investigated at different stresses and temperatures. Reduced creep strain rate and strain were obtained for the modified propellant, implying enhanced creep resistance performance. The creep properties were quantitatively evaluated using a six-element model and the long-term creep performance of the propellant was predicted using the time–temperature superposition principle. A creep behavior of nearly 10 6 s at 30 °C could be acquired in a short-term experiment (800 s) at 30–70 °C. Moreover, the stress relaxation investigation of the propellants with and without MHBPE at −40 °C, 20 °C and 70 °C suggested that MHBPE/HTPE/AP/Al/RDX propellant possessed better response ability to deformation. Thus, the application of MHBPE provides an efficient route of reinforcement to enhance the creep resistance and stress relaxation properties. © 2020 Society of Chemical Industry
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 32
·18940-18949
·
IF 10.733
Xiaohao Liu,Linbin Tang,Zhi Li,Jianhua Zhang,Qunjie Xu,Haimei Liu,Yonggang Wang,Yongyao Xia,Yuliang Cao,Xinping Ai
The low energy density and the unsatisfactory cycling stability of cathode materials in sodium-ion battery systems have restricted their wider application. Here, a representative high voltage cathode of Na4Co3(PO4)2P2O7 (NCPP) was modified through Al doping. The as-prepared Na3.85Co2.85Al0.15(PO4)2P2O7 (Al0.15-NCPP) can deliver a discharge capacity of 99.5 mA h g−1 at 0.5C. A superior rate capability (80.3 mA h g−1 at 20C and 73.4 mA h g−1 at 50C) as well as excellent ultralong cycling stability (96.3% capacity retention after 900 cycles at 10C and 82.7% capacity retention after 8000 cycles at 30C) can be obtained. The excellent sodium storage properties are benefited from the advantages of Al doping. Al doping not only enhances ionic conductivity, but also improves the structural stability. Al0.15-NCPP, which has outstanding electrochemical properties, has been proposed as a very attractive high voltage cathode material for sodium-ion batteries. More impressively, a full cell assembled with an Al0.15-NCPP cathode and hard carbon (HC) anode exhibits distinguished rate/cycling performances (70.6 mA h g−1 at 30C and 95% capacity retention after 200 cycles at 1C) and an extremely high output voltage of 4.36 V, thus providing a preview of its practical application. In addition, our research can be used to enhance the electrochemical properties of other polyanion-based high voltage electrode materials.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Chao Yu,Zhanfang Cao,Shuang Chen,Shuai Wang,Hong Zhong,Xin Ma
For many advanced energy technologies, it is essential to produce non-precious metals, high activity, and low charge transfer resistance electrocatalysts through low cost and simple methods. In this work, MoSe 2 -CoSe 2 @CoAl-LDH composite was synthesized by a one-step hydrothermal method. Compare with the CoAl-LDH catalyst, the prepared MoSe 2 -CoSe 2 @CoAl-LDH composite exhibits an excellent OER performance with a low overpotential (320 mV at 10 mA·cm −2 ), a small Tafel slope (71 mV·dec −1 ). The prominent OER performance of the MoSe 2 -CoSe 2 @CoAl-LDH composite can be mainly attributed to the fast electron transfer from the CoAl-LDH to MoSe 2 -CoSe 2 and the catalytic activity promoted by the energy change of Co 2+ due to the introduction of Se, which can be confirmed by EIS and XPS results, respectively. The strategy of this work may provide a low-cost and facile way for large-scale synthesis of non-precious metal modified hydrotalcite composite.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Min Zhao,Ziang Zhao,Yuan Lyu,Wei Lu,Ming Jin,Tao Liu,Hejun Zhu,Yunjie Ding
Suitable metal–support interaction is of great significance for the supported Fischer–Tropsch catalyst. Herein, we synthesized a series of porous spinel MAl2O4 (M = Co, Mg, Zn) together with Al2O3, via a sol–gel method and used them as supports for the Co-based Fischer–Tropsch synthesis (FTS) catalyst to investigate the influence of metal–support interaction on Co dispersity, reducibility, and catalytic performance. The catalytic performance showed that 15Co/CoAl2O4 had the highest activity and C5+ selectivity, as well as favorable stability during 1000 h lifetime testing. The catalysts were characterized by physisorption, chemisorption, HRTEM, XPS, and TPSR. The results indicated that 15Co/CoAl2O4 showed weaker metal–support interaction than 15Co/MgAl2O4 and 15Co/Al2O3, which was considered as the key factor for its higher reducibility and CO dissociation ability, contributing to the higher CO conversion. The higher Co dispersity on CoAl2O4 resulted from the smaller particle size of Co species on CoAl2O4, contributing to the higher activity of 15Co/CoAl2O4 than that of 15Co/ZnAl2O4. The higher C5+ selectivity on 15Co/CoAl2O4 and 15Co/ZnAl2O4 than that on 15Co/MgAl2O4 and 15Co/Al2O3 was verified to benefit from the appropriate H2/CO adsorption ability, which was significantly affected by metal–support interaction.
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DOI
高影响因子
Frontiers in Physics
·
2023
·
IF 3.1
Zhang Lan,Yang Shuquan,Xiao Meihui,Chen Lin,Sun Jun,Ding Jianjun,Li Xiaoxiao,Gong Yi,Zheng Kang,Zhang Xian,Tian Xingyou
In this study, the performance of low-temperature sintered Bi-B-Si-Zn-Al glass/SiC composites by vacuum hot-press sintering between 700°C and 1000°C was investigated. The specimen had a relatively preferable density of 95.5% and thermal conductivity of 8.660 Wm−1K−1 after sintering at 900°C for 2 h. The dielectric constant and dielectric loss tangle of the composite were 32.9 and 0.57 at 20 GHz, respectively. The XRD analysis indicated the formation of Bi, Zn and ZnAl2O4 crystals, and the microstructure showed the low contact angle of the glass and SiC grain. Such low-temperature sintered SiC ceramic may have a promising application in the electronic field.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Bo Yang,Jiaxing Zhang,Yunfei Zhang,Shubo Deng,Gang Yu,Jinhua Wu,Hong Zhang,Jianhong Liu
The low-cost Al–Ni alloy particles could achieve high dechlorination activity for 2-chlorophenol (2-CP) with the addition of tetrasodium EDTA (EDTA-4Na) in this study. The species of chelating agent, pH values, and the dosages of chelating agent were investigated for their effects on dechlorination efficiency of 2-CP in solution. EDTA-4Na presented the highest promoting effect for Al–Ni alloy in dechlorination process compared with other chelating agents, which is closely correlated with the conditional stability constant ( K f ′ ) of chelates formed. The optimized result showed that 0.389 mM of 2-CP was completely dechlorinated into phenol using 10 g L −1 of Al–Ni alloy and 10 mM of EDTA-4Na at initial pH 11.0 within 45-min reaction. Recycling tests of the alloy particles showed that Al–Ni alloy coupling with EDTA in aqueous solution exhibited high dechlorination activity and stability before being exhausted. The maintenance of Al–Ni alloy activity for dechlorination was mainly attributed to the promoting effect of EDTA-4Na on Al corrosion, the inherent structure of alloy with Ni crystal homogeneously dispersing into Al substrate, and the change of its surface morphology with more active sites formed by EDTA corrosion.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 11
·4587-4600
·
IF 1.754
Tao qinqin,Xie Jinhua,Li Yan,Dai Ying,Liu Zhirong
Mg-Al layered double hydroxides (LDH) (F-MgAl-LDHs and O-MgAl-LDHs) and Mg-Al layered double oxides (LDO) (F-MgAl-LDO and O-MgAl-LDO) nanosheets were prepared using a modified co-precipitation and oven/freeze dry route for adsorption of uranium. The freeze dry could evidently promote the adsorption ability. It’s resulted from larger specific surface (F-MgAl-LDO > F-MgAl-LDHs > O-MgAl-LDO > O-MgAl-LDHs) and pore size, as well as sufficient expose of vacant sites in the inner struture of F-MgAl-LDHs and F-MgAl-LDO. The pH, shaking time, initial uranium concentation and temperature influenced the adsorption capacity of F-MgAl-LDHs, O-MgAl-LDHs, F-MgAl-LDO and O-MgAl-LDO, while ionic strength exerted slightly little influence. Na 2 CO 3 highlighted the best desorption effectivity, with desorption efficiency of 97.84% for F-MgAl-LDHs and 98.52% for F-MgAl-LDO, respectively. It is noteworthy that maximum adsorption capacity of F-MgAl-LDO reached 1099.93 mg/g, locating the top rank in the uranium-specific adsorbents. The adsorption conformed to the pseudo-second-order model, indicating chemical adsorption in nature. The thermodynamic was also investigated. The adsorption mechanism was determined that M-O and C-O bonds participated the complex process in the uranium adsorption. The study proposed the freeze dry as an efficient method to promote adsorbent performance.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhi-Rong Li,Jing Liu,Jing-Yi Sun,Zhi-Yi Hu,Wan-Ying Li,Ting-Ting Shen,Mei-Tong Wei,Zhi-Wen Yin,Si-Ming Wu,Gustaaf Van Tendeloo,Yu Li,Bao-Lian Su
The Ni/Al layered double oxide (Ni/Al-LDO) is a promising photocatalyst because of the high surface area and abundant active sites. However, the application of Ni/Al-LDO for photocatalytic hydrogen evolution is hindered by the unclarity of the optimized microstructure and limited light absorption. In this work we report the structural evolution from Ni/Al layered double hydroxides (Ni/Al-LDH) to Ni/Al-LDO, which is able to achieve a precise regulation of the layered structure with abundant acid sites for photocatalysis. Further, CdS quantum dots (QDs) are in-situ grown on the sheet-like Ni/Al-LDO to obtain a close contact 0D/2D CdS-Ni/Al-LDO heterojunction. CdS-Ni/Al-LDO exhibits a hydrogen evolution efficiency of 20.3 mmol/g/h and an apparent quantum yield (AQY) of 22.2 % at a wavelength of 450 nm. The superior performance is attributed to the synergistic effects of abundant Lewis and Brønsted acid sites of Ni/Al-LDO, the layered structure with a high specific surface area and the heterojunction between Ni/Al-LDO and the CdS QDs.
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