Journal of Renewable and Sustainable Energy
·
2016
·Vol. 8
·期 5
·
IF 0.961
Lu Meizhen,Liu Xuejun,Li Yongqiang,Nie Yong,Lu Xianghong,Deng Dongshun,Xie Qinglong,Ji Jianbing
Bi-functional catalysts consisting of platinum on aluminosilicate MCM-41 materials with Si/Al ratios between 10 and 30 were prepared via direct mixed-gel synthesis. The catalysts were tested in the hydrocracking of bio-alkanes, produced from biodiesel hydrodeoxygenation and composed of n-hexadecane and n-octadecane, for the production of bio-jet fuel. The effects of temperature, pressure, weight hourly space velocity (WHSV), and H 2 /n-paraffin weight ratio on bio-alkanes conversion and product distribution were examined. The conversion was found to be dependent on the acid strength of the catalyst supports which were proportional to the Al content. However, the catalyst selectivity decreased with the increasing Al content. The optimal Si/Al ratio, temperature, pressure, WHSV, and H 2 /n-paraffin weight ratio were determined to be 20, 330 °C, 2 MPa, 1 h −1 , and 0.20, respectively. Under these conditions, the bio-alkanes conversion and kerosene/gasoline ratio in the product reached 65.62% and 1.96, respectively.
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 12
·12635-12639
·
IF 1.338
Du Jingjing,Xie Shaowen,Li Na,Xu Jianxiong,Xu Lijian
Hierarchical nanoporous Al–SiO2 particles were prepared in this study by dissolving template method. The hierarchical nanoporous Al–SiO2 particles with hollow structure were analyzed by transmission electron microscope (TEM), energy dispersive spectrometer
(EDS), scanning electron microscope (SEM), nitrogen adsorption stripping curves and Barrett-Joyner-Halenda (BJH) pore size distribution curves. Hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes were prepared by composite deposition of hierarchical nanoporous
Al–SiO2 particles onto electroplating bath of Ni–Mo. Results showed that the specific surface area for the hierarchical nanoporous Al–SiO2 sample was 396 m2/g, with pore volume being 1.37 cm3/g and mesoporous pore size being 3.3
nm. The hydrogen evolution electrocatalytic activities for the composite electrodes reached the optimal value when the concentration of the hierarchical nanoporous Al–SiO2 in the electroplating bath was 2 g/L, indicating that their “foam” structure did not only
enhance the electrode surface area but also effectively improved the electrocatalytic properties of aluminum and showed that the electrocatalytic hydrogen evolution by the hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes had more advantages than that of the
Ni–Mo electrodes alone.
✓ 已验证
DOI
高影响因子
MOLECULES
·
2010
·Vol. 15
·期 8
·5139-5152
·
IF 1.738
Lu Lin,Ying Liu
A series of Ni-based catalysts were prepared using hydrogen reduction of Ni/Al hydrotalcite-like compounds (Ni/Al HTlcs) synthesized by coprecipitation. The physico-chemical properties of Ni/Al hydrotalcite-like compounds and the corresponding Ni-based catalysts were characterized using inductively coupled plasma (ICP), BET surface areas, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) techniques. The results indicated that Ni/Al HTlcs with layered structures could be successfully prepared by the coprecipitation method, and the characteristic HTlcs reflections were also observed in the XRD analysis. The NiO and Ni0phases were identified in all Ni-based catalysts, which displayed randomly interconnected pores and no layer structures. In addition, the studies also found the Ni/Al HTlcs and Ni-based catalysts had high specific surface areas, low pore volumes and low pore diameters. The catalytic hydrogenation of ethyl acetate to ethanol with Ni-based catalysts was also investigated. Among the studied catalysts, RE1NASH-110-3 showed the highest selectivity and yield of ethyl acetate to ethanol, which were 68.2% and 61.7%, respectively. At the same time, a major by-product, butyl acetate, was formed due to an ester-exchange reaction. A proposed hydrogenation pathway for ethyl acetate over Ni-based catalysts was suggested.Keywords:hydrogenation;ethyl acetate;ethanol;Ni/Al hydrotalcite-like compounds
✓ 已验证
DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2019
·
IF 4.507
Xiaoping Wu,Qiao Zhang,Lungang Chen,Qiying Liu,Xinghua Zhang,Qi Zhang,Longlong Ma,Chenguang Wang
The development of thermally stable Pt-based catalysts with superior performance for propane dehydrogenation reactions remains a daunting challenge. In this study, a series of PtSn-Mg(Zn)AlO catalysts with different Zn and Pt contents were synthesized by the anion-exchange method for the propane dehydrogenation reaction. To investigate the influence of Zn on the reaction performance and the catalyst structure, the prepared catalysts were characterized with several analytical techniques, including XRD , TEM, HRTEM, H 2 -TPD and CO pulse chemisorption . A good propane conversion (initially higher than 55% and averaging 45.2% over a period of 2 h) and propene selectivity (higher than 99%) were obtained experimentally with PtSn-Mg(3Zn)AlO at 550 °C. The results demonstrated that Pt provided the active sites and that Zn was a promoter. The HRTEM and CO pulse chemisorption results indicated that the addition of Zn to the PtSn-MgAlO catalyst can stabilize the dispersion of metal particles and thus inhibit the sintering of Pt particles. Furthermore, the activities of the used catalysts were almost recovered through reaction-regeneration cycles with the burning-off of coke during five cycles.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 16
·8668
·
IF 5.924
Jie Li,Shiyi Wang,Huayin Li,Yuan Tan,Yunjie Ding
The synthesis of ester compounds is one of the most important chemical processes. In this work, Zn-Mg-Al mixed oxides with different Zn2+/Mg2+molar ratios were prepared via co-precipitation method and supported gold nanoclusters to study the direct oxidative esterification of aldehyde and alcohol in the presence of molecular oxygen. Various characterization techniques such as N2-physical adsorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and CO2temperature programmed desorption (TPD) were utilized to analyze the structural and electronic properties. Based on the results, the presence of small amounts of Zn2+ions (~5 wt.%) provoked a remarkable modification of the binary Mg-Al system, which enhanced the interaction between gold with the support and reduced the particle size of gold. For oxidative esterification reaction, the Au25/Zn0.05MgAl-400 catalyst showed the best performance, with the highest turnover frequency (TOF) of 1933 h−1. The active center was believed to be located at the interface between metallic gold with the support, where basic sites contribute a lot to transformation of the substrate.Keywords:gold catalyst;cluster;hydrotalcite;oxidative esterification;methyl isobutyrate
✓ 已验证
DOI
PubMed
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-10
·
IF 4.996
Tan Meina,Qin Yang,Wang Yiping,Zhang Fazhi,Lei Xiaodong
We propose a new Cu–Al dual-ion battery that aqueous solution composed of LiCl, CuCl and AlCl 3 (LiCuAl) is used as the electrolyte, CuS is used as the cathode of aqueous aluminum ion battery for the first time and copper foil is used as the anode. The assembled Cu–Al dual-ion battery yields a reversible capacity of 538 mA h/g at 200 mA/g, and exhibits longterm cycling stability of over 200 cycles with 88.6% capacity retention at 1000 mA/g. Above excellent performance is inseparable from the three components of LiCuAl electrolyte and electrode materials. The Al-storage mechanism of CuS is proposed that the S–S bond in CuS lattice interacts with aluminum ions during the aluminum storage process. In addition, the charging and discharging process does not cause irreversible damage to the S–S bond, thus Cu–Al dual-ion battery with CuS as cathode shows great cycle stability.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ruixin Yan,Xiuping Feng,Long Kong,Qun Wan,Weilin Zheng,Takeshi Hagio,Ryoichi Ichino,Xinde Cao,Liang Li
Hexavalent Chromium (Cr(VI)) in water is a public health concern and has been a challenging research subject in environmental field for many years. Herein, a novel composite material consisting of amorphous iron sulfides supported on hydrotalcites (FeS/HTs) was synthesized by “calcination-reconstruction-calcination” process, which enables homogeneous distribution of iron and sulfur on the surface of hydrotalcites (HT). The composite (mass ratio of FeS/HT was 1/2) could effectively remove over 98% of Cr(VI) within 10 min. A pseudo-second-order kinetic model and a Langmuir isotherm model were well fitted the sorption data with a maximum removal capacity of 206.2 mg/g. The superior adsorption capacity of FeS/HTs could be attributed to the combination of the advantages of abundant adsorption sites on HT and powerful reduction properties of iron sulfides. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis suggested the adsorbed Cr(VI) on the surface and interlayer of FeS/HTs had been reduced to Cr(III) by reductant iron and sulfur. This study demonstrated that FeS/HTs has potential application prospects in Cr(VI) removal.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 5
·2291-2300
·
IF 10.733
Xin Wang,Hui Li,Han Li,Shuai Lin,Jin Bai,Jianming Dai,Changhao Liang,Xuebin Zhu,Yuping Sun,Shixue Dou
An energy storage system based on a battery-type electrode and a capacitive electrode as a hybrid supercapacitor offers a promising way to construct devices with advantages of both rechargeable batteries and carbon-based supercapacitors. NiCoAl-LDH nanosheets uniformly grow onto micron-scaled MXene sheets to form a NiCoAl-LDH/V4C3Tx heterostructure with three-dimensional interconnected porous network microstructures by a hydrothermal method. NiCoAl-LDH/V4C3Tx composite electrodes show an excellent specific capacity of 627 C g−1 at a current density of 1 A g−1 in 1 M KOH. Especially, the NiCoAl-LDH/V4C3Tx electrodes exhibit a specific capacity of 300 C g−1 even at a high current density of 20 A g−1 in 1 M KOH, showing excellent rate performance. Hybrid supercapacitors, constructed with NiCoAl-LDH/V4C3Tx as the battery-type electrode and activated carbon (AC) as the capacitive electrode, show superior energy densities of 71.7 and 45.0 W h kg−1 at power densities of 830 and 20 000 W kg−1 in 1 M KOH, respectively. The excellent capacity retention rate is 98% for the hybrid device after 10 000 cycles at 20 A g−1 in 1 M KOH. The NiCoAl-LDH/V4C3Tx heterostructures can be used as promising electrode materials for low-cost hybrid supercapacitor devices.
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2025
·
IF 3
Md Mostafezur Rahman,Shuai-Wen Ding,Mohanraj Kumar,Wei Zhang,Jih-Hsing Chang
Magnetic nanoparticles (MNPs) with temperature-dependent heating behavior offer a promising strategy for self-regulated magnetic induction hyperthermia (MIH) in cancer treatment. This study simulates the temperature-dependent heating performance of Al-doped Zn Mn ferrite nanoparticles (Zn 0.5 Mn 0.5 Al x Fe 2-x O 4 ) in a human liver tumor model, using experimentally validated parameters from previous characterization. The model evaluates in-tumor heating under physiological conditions, focusing on temperature rise, spatial uniformity, and thermal stability. The results confirm that MNPs with lower Curie temperatures (T C ) offer better temperature control, while higher-T C particles enable more efficient heating at reduced concentrations. Experimental validation using magnetic hydrogel phantoms demonstrated good agreement with simulation predictions, with temperature deviations within ±1.5 °C. These findings highlight the importance of incorporating temperature-dependent specific loss power (SLP) behavior for accurate modeling of hyperthermia outcomes and provide a practical framework for optimizing MNP selection and dosage for safe and effective treatment.
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Fangjing Xiao,Guibin Jiang,Duo Bu,Jianjie Fu,Xiaomei Cui,Qiangying Zhang
A porous aluminum–cerium (Al/Ce) composite oxide was innovatively synthesized via a one-step, template-free evaporation–pyrolysis route, enabling in-situ formation of sulfate-templated mesopores and dual-functional –OH/SO 4 2 ⁻ sites. Designed to address the severe ion interference of geothermal water, this bifunctional adsorbent achieved rapid, simultaneous removal of arsenic (As) and fluoride (F⁻) with high efficiencies (93.8 % As, 91.5 % F⁻) within 15 min. Maximum adsorption capacities reached 251 mg/g (As) and 297 mg/g (F⁻), following pseudo-second-order kinetics and Freundlich isotherms. Thermodynamic analysis confirmed spontaneous, endothermic chemisorption. Structural characterizations (FT-IR, XRD, XPS) revealed ion exchange and surface complexation mechanisms via formation of Al–F, Ce–F, and Ce–O–As bonds. Remarkably, in real geothermal matrices rich in competing ions, removal efficiencies exceeded 96 %, underscoring the composite's strong anti-interference performance. This study demonstrates a scalable, environmentally friendly strategy for fabricating robust, synergistic adsorbents tailored for complex wastewater treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energetic Materials Frontiers
·
2025
·
IF 3.9
Jia-he Li,Feng Hao,Chang-sheng Tang,Lu-yang Wang,Yan-qiu Jiang,Yu-lin Yang,De-bin Xia,Jian Zhang,Ping Wang,Kai-feng Lin
Alloy based composite fuel has been widely studied for its higher combustion effect and energy release, compared with traditional metal fuels. The doping of organometallic salt was the key to facilitating the mass and heat transfer process in propellant combustion. In this study, the Al-Li particles were stabilized through tris(hydroxymethyl)aminomethane hydrochloride (TH) firstly, and the copper perfluorooctanoate Cu(PFO) 2 was obtained through a double displacement reaction and characterized by X-ray diffraction (XRD), fourier transform infrared spectrometer (FT-IR), Ultraviolet–visible spectroscopy (UV-vis), scanning electron microscope (SEM) and thermogravimetric analysis and differential scanning calorimeter (TG-DSC) tests. Owing to the characteristics of easy film formation, the Cu(PFO) 2 could be attached to the passivated Al-Li@TH surface through the solvent evaporation method with good hydrophobicity. The thermal oxidation and combustion characteristics were evaluated by TG-DSC and ignition test for the Al-Li@TH@Cu(PFO) 2 and propellants. The Al-Li@TH@5Cu(PFO) 2 propellant had a better burning rate of 1.21 mm·s -1 , a shorter ignition delay time of 0.67 s, a higher combustion temperature of 1411.26°C and smaller combustion residue distribution with an obvious micro-explosion effect and more stable combustion. The existence of AlF 3 also proved that the release of corrosive gases produced by Cu(PFO) 2 decomposition, which could effectively promote the rupture of Al-Li alloy shell. Besides, the activation energy of Al-Li@TH@5Cu(PFO) 2 and AP could be reduced to 139.37 kJ·mol -1 with a better catalytic effect. The combustion mechanism had also been analyzed through the combustion phenomena and residue composition. The exploration of propellant combustion could offer a promising avenue for applying Al-Li alloys in various propulsion systems.
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2025
·Vol. 92
·期 10
·1441-1456
·
IF 2.6
Wang Wenhao,Ge Aijun,Xu Yuan,Yang Xuesong,Feng Shiying,Su Ying,Wang Weida,Xing Liqun,Hao Xiujuan
View large Download slide View large Download slide Close modal In the study, a novel Fe/Al bimetal with a high specific surface area and electron transfer capacity was synthesized through ball milling Fe and Al powder. Importantly, this synthesis process did not consume Al powder and did not generate by-products that required treatment. Compared with Fe or Al powder and the ball-milled Fe or Al powder, Fe/Al could rapidly remove Cr(VI) through adsorption–reduction under near-neutral conditions. Nevertheless, the removal efficiency of Cr(VI) by Fe/Al was influenced by the initial pH of the solution and dissolved oxygen (DO). Kinetic studies and adsorption isotherm analysis demonstrated that the pseudo-second-order adsorption kinetic model and the Freundlich model could better describe the Cr(VI) removal data, and the maximum removal amount of Cr(VI) was 6.25 mg/g. Furthermore, based on the characterization analysis of XPS, the adsorbed Cr(VI) was reduced to Cr(III). SEM-EDS analysis revealed that Cr mainly overlapped with the Fe elemental distribution on the surface of Fe/Al particles, suggesting that Fe was the main reaction site. Consequently, the results indicated that highly active Fe/Al could be prepared by solid–solid blending for pollutant removal, which provided technological concepts for the waste utilization of scrap iron and aluminum. Increasing the specific surface area of Fe/Al by ball milling of Fe and Al powder was the key to enhancing Cr(VI) removal. Cr(VI) was mainly removed by adsorption–reduction under near-neutral pH. The removal sites of Cr(VI) by Fe/Al mainly occur on the surface of Fe. The maximum adsorption capacities of Cr(VI) by Fe/Al were 6.25 mg/g.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）