INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Hongqin Ma,Xiao Sun,Meijie Wang,Jiasheng Zhang
This research focused on the removal of dibenzothiophene (DBT) from model diesel oil using CuO-loaded γ-Al2O3–reduced graphene oxide (CuO/γ-Al2O3–RGO) as an adsorbent, which possesses the highest adsorption capacity among reported regenerable graphene-related materials. The boehmite–RGO supports were synthesized using a one-pot hydrothermal synthesis method. As the RGO sheet surfaces are completely covered and isolated by boehmite nanorods formed via hydroxyl condensation of [Al(OH)x](3–x)+ or Al(OH)3 and the −OH of graphene oxide (GO), the specific surface area of boehmite–RGO increased to 378 m2/g, which is 20.8% higher than that of RGO (313 m2/g). CuO/γ-Al2O3–RGO adsorbents with different CuO contents were prepared, and their DBT adsorption desulfurization properties were evaluated. With a 2% mass ratio of CuO to boehmite–RGO, CuO/γ-Al2O3–RGO displays the highest DBT adsorption capacity (6.0 mg S/g) under ambient conditions, which improved by 53.8% in comparison with that of pure RGO (3.9 mg S/g). Moreover, the regeneration of the CuO/γ-Al2O3–RGO adsorbent is much more practical than that of the pure RGO adsorbent.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2013
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IF 2.145
Rui-tang Guo,Yue Zhou,Wei-guo Pan,Jie-nan Hong,Wen-long Zhen,Qiang Jin,Cheng-gang Ding,Shi-yi Guo
CeO 2 /Al 2 O 3 catalysts prepared by three methods were investigated for selective reduction of NO with NH 3 . It was found that the catalyst prepared by the single step sol–gel method had the best SCR activity and SO 2 resistance performance. From the results of BET, XRD, TPD and TPR, it can be concluded that large surface area, strong interaction, highly dispersed nano-crystalline ceria , high NH 3 adsorption capacity and good redox ability might be the main reasons for the excellent performance of CeO 2 /Al 2 O 3 catalyst prepared by the single step sol–gel method.
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高影响因子
RSC Advances
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2015
·Vol. 5
·期 105
·86445-86452
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IF 3.84
Zhenzhen Zhang,Lingling Wang,Xueyan Liu,Danfeng Zhang,Lei Zhang,Qi Li
A new micro-solid-phase extraction method based on a prestructured filter membrane was developed to facilitate simultaneous analysis of tartrazine (TA) and sunset yellow (SY) with high performance liquid chromatography (HPLC). A filter membrane impregnated with nano-Al2O3 particles was proposed as a new micro-solid-phase extraction (μ-SPE) device for the preconcentration of colorants in food. The method integrated isolation and concentration in one step, and the adsorbed colorants could be easily eluted from the filter membrane for HPLC analysis. This process does not involve any additional sample treatment. The method is facile and easy to operate. The method showed good linearity, with correlation coefficients >0.9982 in the range of 1.0–200.0 ng mL−1, and low limits of detection (0.10–0.20 ng mL−1). Finally, the recovery values were 86.9–124.0% for the colorants in various food samples. The results indicated that the developed method would be a novel method for rapid determination of TA and SY at trace levels in real samples.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Ruirui Zhao,Jiaxing Liang,Jiajun Huang,Ruiyu Zeng,Jiafeng Zhang,Hongyu Chen,Guang Shi
Al 2 O 3 and AlPO 4 single-coated and double-coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials have been synthesized by a wet-coating method in this paper. XRD , XPS , SEM, TEM, DSC as well as electrochemical methods are employed to investigate the structure, surface properties, thermal stability as well as electrochemical properties . The obtained layers are homogenously coated on the particles and the coating thickness is around 20–30 nm, the surface compositions are analyzed by XPS in detail as well. Comparing with those single-coated or uncoated samples, the double-coated one exhibits more superior thermal stability as well as electrochemical properties. The possible reason is mainly due to the dense and uniform coating layer as well as the formation of Li 3 PO 4 and LiAlO 2 on the cathode surface. Based on these results, it seems that Al 2 O 3 and AlPO 4 double-coating is an efficient strategy in improving the properties of LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials, which can be also applied to other Ni-rich layered materials.
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高影响因子
DYES AND PIGMENTS
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2016
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IF 4.055
M.M. Mikhailov,V.V. Neshchimenko,Chundong Li
This study carried out on the diffuse reflective spectra of zinc oxide modified by Al 2 O 3 , ZrO 2 , SiO 2 , CeO 2 , TiO 2 and Y 2 O 3 nanoparticles . It was established that during the modification are formed the solid solutions between zinc oxide and nanopowder as Al 2 ZnO 4 , ZrZnO 3 , Zn 2 SiO 4 , Ce x Zn (1−х) О y , Zn 2 TiO 4 , Y x Zn (1−x) O y . The diffuse reflection spectra of the modified powders are changed in the UV and visible range with a maximum at 395 nm. This band is determined by the intrinsic point defects in the crystal lattice of ZnO as interstitial zinc ions and zinc vacancy. In the IR region also recorded changes due to the absorption of OH-groups adsorbed on the surface modified zinc oxide.
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MATERIALS CHEMISTRY AND PHYSICS
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2016
·
IF 2.101
Dong Feng,Xudong Luo,Guodong Zhang,Zhipeng Xie
In order to determine the relationship between the property of MgOAl 2 O 3 SiO 2 composite ceramics and molar ratios of MgO/Al 2 O 3 , especially the sintering behavior and thermal shock resistance, the MgOAl 2 O 3 SiO 2 composite ceramics were fabricated with micro-size MgO , Al 2 O 3 powder and nano-size SiO 2 as main raw materials. The sample was characterized by phase analysis, densification and thermal shock times. Moreover, field emission scanning electron microscope was also conducted to study microstructure of the samples before and after thermal shock. Effect of different molar ratios of MgO/Al 2 O 3 on the sintering behavior and thermal shock resistance of composite ceramics were investigated. The results showed that the sample possess better sintering behavior and thermal shock resistance with the molar ratio of MgO/Al 2 O 3 equal to 2/1. Grains of periclase and spinel were directly bonded together, resulting in a dense and compact microstructure, and the bulk density of obtained sample reached 3.4 g/cm 3 . The microstructure of sample after thermal shock revealed that the crack propagation path was deflected and bifurcated, the main-crack propagation was restricted and more fracture energy was consumed, the thermal shock resistance of composite ceramics was greatly improved.
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高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 4
·953-963
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IF 2.799
Wu Chunyan,Yuan Wenwen,Huang Yi,Xia Yongmei,Yang Huamei,Wang Haijun,Liu Xiang
Abstract A novel heterogeneous catalyst was prepared by immobilizing bifunctional acidic ionic liquid of metal Al substituted (BAIL-Al) onto the surface of magnetic γ-Al 2 O 3 , and characterized by FT-IR, TG, XRD, BET, XPS, VSM, SEM and TEM. The catalytic activity of the prepared solid catalyst was investigated for the conversion of xylose to furfural. On the basis, the effects of temperature, time, amount of catalyst and solvent were studied on the yield of furfural. A furfural yield of 67.5% with 97.3% xylose conversion was obtained from xylose using Fe 3 O 4 @Al 2 O 3 -(BAIL-Al) as the catalyst in DMSO at 140 °C for 3 h. The immobilized catalyst has the features of easily separation and recycling as well as good thermal stability. Thus, the immobilized catalyst can be efficiently and easily recycled at least five times without apparent loss of activity in xylose conversion and furfural yield. Graphical Abstract A novel heterogeneous catalyst was prepared by immobilized bifunctional acidic ionic liquid (BAIL-Al) onto the surface of magnetic γ-Al 2 O 3 , possessing unique physicochemical properties and excellent catalytic activity for xylose transformation have been developed.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Shuyu Qi,Zilong Zhao,Yingqing Ou,Lu Liu,Yatao Ren,Wenyi Dong,Hongjie Wang,Zigong Ning
In this study, a calcium-rich biochar (CRB)-enhanced dual reaction center (DRC) Fenton-like catalyst, Cu-Al 2 O 3 -CRB, was synthesized for the decomplexation of a typical heavy metal complex pollutant, Ni-ethylenediaminetetraacetic acid (Ni-EDTA), in industrial wastewater. After a 90-minute reaction, the removal rate of Ni(II) could reach 95.2%, regardless of the initial solution pH. Various characterization analyses confirmed the formation of electron-rich Cu regions and electron-deficient Al and C regions in the Cu-Al 2 O 3 -CRB catalyst. The catalytic oxidation experiments, chronoamperometry tests, and reactive oxygen species (ROSs) detection further revealed the roles of biochar and CaCO 3 on the catalytic behavior of Cu-Al 2 O 3 -CRB catalyst. The presence of biochar not only enhanced the loading of Cu species but also introduced additional electron transfer channels, while CaCO 3 further interacted with biochar/Cu species to amplify the electron cloud density surrounding Cu. The improvement of electronic polarization facilitated the activation of H 2 O 2 and the generation of •O 2 – , 1 O 2 and •OH. Contrary to conventional interfacial reactions, the weak adsorption between Cu-Al 2 O 3 -CRB and Ni-EDTA due to the electrostatic repulsion, led to the decomplexation reactions primarily occurring in the solution phase, rather than on the catalyst surface. This study sheds light on the potential of Cu-Al 2 O 3 -CRB as a DRC catalyst and emphasizes the significance of contaminant properties when using this kind of catalysts.
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高影响因子
Polymers
·
2024
·Vol. 16
·期 11
·1491
·
IF 4.7
Hongyi Zhu,Shunxia Wu,Rui Tang,Yang Li,Gang Chen,Bingxue Huang,Biyou Peng
Electronic devices play an increasingly vital role in modern society, and heat accumulation is a major concern during device development, which causes strong market demand for thermal conductivity materials and components. In this paper, a novel thermal conductive material consisting of polydimethylsiloxane (PDMS) and a binary filler system of h-BN platelets and Al2O3nanoparticles was successfully fabricated using direct ink writing (DIW) 3D printing technology. The addictive manufacturing process not only endows the DIW-printed composites with various geometries but also promotes the construction of a 3D structural thermal conductive network through the shearing force during the printing process. Moreover, the integrity of the thermal conductive network can be optimized by filling the gaps between the BN platelets with Al2O3particles. Resultingly, the configuration of the binary fillers is arranged by the shearing force during the DIW process, fabricating the thermal conductive network of oriented fillers. The DIW-printed BN/Al2O3/PDMS with 45 wt% thermal conductive binary filler can reach a thermal conductivity of 0.98 W/(m·K), higher than the 0.62 W/(m·K) of the control sample. In this study, a novel strategy for the thermal conductive performance improvement of composites based on DIW technology is successfully verified, paving a new way for thermal management.
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PubMed
高影响因子
ENERGY
·
2025
·
IF 9.4
Da Cui,Peng Zhang,Shuang Wu,Hon Man Luk,Yixi Wu,Bin Liu,Shuo Pan,Jingru Bai,Qing Wang,Xuehua Zhang
Oil shale has garnered significant attention as a supplementary energy source to traditional fossil fuels. In this study, we investigated the catalytic hydrothermal liquefaction (HTL) of shale oil sludge using three catalysts (Fe, Na 2 CO 3 , Ni/Al 2 O 3 ) and three combinations in pairs. The hydrothermal oil (HTO) yield, energy recovery (ER), and conversion rate (CR) of organic matters were comprehensively analyzed under six catalyst conditions. Both Fe + Na 2 CO 3 and Fe + Ni/Al 2 O 3 paired catalyst combinations achieved similar HTO yields of 28.43 % and 28.13 % along with ER values of 56.19 % and 57.94 % respectively. Moreover, these two groups achieved remarkably high CR values of 81.88 % and 81.02 %, respectively. The HTO from the Fe + Ni/Al 2 O 3 combination has the highest H/C ratio and the lowest O/C ratio at 1.682 and 0.032, respectively. Elemental composition, Fourier transform infrared spectroscopy (FT-IR), and gas chromatography-mass spectrometry (GC-MS) analyses of HTO were conducted in this study. The HTO produced by using Fe + Ni/Al 2 O 3 exhibited the most ideal distillation distribution, with fractions below diesel accounting for up to 96.94 %. Based on the catalytic functions of Fe, Ni, and Al 2 O 3 , six potential synergistic mechanisms of Fe + Ni/Al 2 O 3 were summarized. These mechanisms highlighted Fe + Ni/Al 2 O 3 's roles in promoting compound conversion pathways in HTO, ultimately revealing the synergistic catalytic mechanism.
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Journal of the Mechanical Behavior of Biomedical Materials
·
2025
·
IF 3.5
Yongning Han,Wenying Zhou,Jian Li,Zhuoqun Han,Lunan Bi,Zheng Zhang,Yang Wang,Ling Li,Degang Zhao
Silicon nitride (Si₃N₄) ceramics exhibit excellent mechanical properties and biocompatibility, making them highly suitable for biomedical applications, particularly in implants. In this study, the mechanical properties and bioactivity of Si₃N₄ ceramics with varying amounts of Y₂O₃-Al₂O₃-SiO₂ sintering aids were investigated. Increasing the sintering additive content from 4 wt% to 8 wt% substantially improved the bulk density of the ceramics, leading to notable enhancements in mechanical properties. These included a Vickers hardness increase to 10.07 GPa, a flexural strength increase to 605 MPa, and a fracture toughness increase to 2.43 MPa m 1/2 . The optimal combination of mechanical properties was achieved with 8 wt% sintering additives due to the higher aspect ratio and lower porosity. After immersion in simulated body fluid (SBF), the surface of the Si₃N₄ ceramics was coated with a Ca and P-rich layer, morphologically similar to hydroxyapatite. The layer formation was facilitated by the presence of SiO₂, which promoted hydroxyapatite nucleation and growth, as well as the rapid release of Ca 2 ⁺ ions and the sustained stability of the apatite layer.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Rong Liu,Jie Chen,Zhanghao Gong,Lihao Sun,Shengtao Dai,Wei Zhao,Mingshuo Ma,Zhigang Liu
In order to enhance the mechanical performance of carbon fiber/epoxy resin composites (CF/EPs), a series of γ-Al 2 O 3 nanosheet/graphene (AG) composites were prepared by hydrothermal method, and successfully introduced into the carbon fiber (CF) surface via self-assembly process, which significantly improved the interfacial bonding force between CF and EP. Mechanical test results showed that the AG modified CF/EPs exhibited superior properties in interfacial shear strength (IFSS), interlaminar shear strength (ILSS), tensile strengths, and flexural strengths compared with the untreated CF/EPs, which were enhanced by 142.9%, 59.6%, 152.5%, and 40.5%, respectively. This is mainly because AG largely increases the CF surface roughness and penetrates into the matrix to enhance the mechanical interlocking effect, crack deflection effect, and Van der Waals forces between CF and polymer matrix. Briefly, the AG synthesized in this study will provide an experimental validation for the development of high-performance carbon fiber reinforced polymer composites (CFRPs) and exhibit potential application prospects in automotive and other fields. Highlights Graphene effectively inhibits the agglomeration of γ-Al 2 O 3 nanosheet. γ-Al 2 O 3 nanosheet/graphene increases the interfacial properties of CF/EPs. γ-Al 2 O 3 nanosheet/graphene largely enhances the mechanical performance of CF/EPs. The as-prepared AGCF/EPs have potential application in automotive and other fields.
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