FUEL
·
2022
·
IF 8.035
Jiayu Hao,Yanqiu Wang,Kuang Sheng,Yahui Yang,Zhongliang Tian,Yang Liu,Wenzhang Li,Jie Li
Oxygen reduction reaction (ORR) is the core process of metal-air battery. Glucose and fructose are the primary monomers in biomass. In this work, the molecular configuration transformation between pyranose (glucose) and furanose (fructose) is selected as an entry point to construct thinner micropore-riched carbon skeleton with high amount of active sites. The molecular configuration transformation from furanose to pyranose increases the activation barrier associated with the molecular conversion, self-assembly, and aromatization reaction. The higher activation barrier slows the dynamic pyrolysis process, which favors the pore-forming and graphitization of precursors. The Glu-SSC-950–1 (derived from pyranose) exhibits a larger electrochemical active surface area (ECSA) and faster electron transfer, concretely, double-layer capacitance increases from 7.4 to 14.9 mF cm −2 . And the Glu-SSC-950–1 exhibits a higher half-wave potential (0.847 V) and kinetic current density at half-wave potential (3.91 mA cm −2 ) than Fru-SSC-950–1 (derived from furanose, 0.801 V, 2.92 mA cm −2 ). In practical application, the Al-air battery with Glu-SSC-950–1 exhibits a superior peak power density (467.8 mW cm −2 ) than Fru-SSC-950–1 (400.7 mW cm −2 ). In general, we present an approach for the preparation of highly active ORR biomass-derived carbon.
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高影响因子
Petroleum Science
·
2022
·
IF 4.757
Xue-Man Wang,Cheng-Long Wen,Yu Fan
Hierarchical SAPO-11 molecular sieve (ACS-11) was successfully synthesized employing the Al 2 O 3 /carbon (Al 2 O 3 /C) composite obtained through the pyrolysis of Al-based metal-organic framework (Al-MOF-96) as mesoporogen. Unlike other carbon-based mesoporogens with strong hydrophobicity, the Al 2 O 3 /C interacts with phosphoric acid and generates the AlPO 4 /C structure, which promotes the Al 2 O 3 /C dispersion in the synthesis gel of SAPO-11 and avoids the phase separation between them. The Al 2 O 3 /C as mesoporogen decreases the crystallite size of SAPO-11 via preventing the aggregation of SAPO-11 crystals. Additionally, the addition of Al 2 O 3 /C improves the Si distribution in the ACS-11 framework. Consequently, ACS-11 has smaller crystallites, more mesopores, and a greater amount of medium Brønsted acid centers than the conventional microporous SAPO-11 and the SAPO-11 synthesized using activated carbon as mesoporogen. The corresponding Pt/ACS-11 catalyst exhibits the maximal selectivity to multi-branched C 10 isomers (23.28%) and the minimal cracking selectivity (15.83%) in n-decane hydroisomerization among these catalysts. This research provides a new approach for preparing hierarchical silicoaluminophosphate molecular sieve-based catalysts to produce high-quality fuels.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Jinglin Ding,Shengxiang Rong,Zhuo Chen,Jun Luo,Baowei Zhang
A novel hexagonal AgBr/Zn-Al MMO S-scheme photocatalyst was prepared by adopting a simplified hydrothermal and co-precipitation method. The prepared photocatalytic system exhibited excellent photocatalytic performance in degradation of tetracycline hydrochloride (TC). In particular, the ABMO0.2/Vis system generated the best TC removal rate (95%) within 60 min of visible light irradiation. Moreover, no significant decrease of the photocatalytic performance had been observed after four cycles, while the leaching of silver ions was effectively controlled. The excellent photocatalytic performance can be attributed to the synergistic effect occurring between the unique morphological structure and the S-scheme heterojunction charge transfer mechanism, since that that synergistic effect enhanced light absorption capacity and separation efficiency of the photogenerated carriers and the redox ability. In addition, liquid chromatography-mass spectrometry (LC-MS) analysis clarified the mineralization behavior and detailed decomposition pathways of TC. This work opens a new pathway for the design of efficient S-scheme heterojunctions and provides new insights into the photocatalytic degradation mechanism of antibiotics.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Wei Zhang,Qiao Li,Rui Li,Nan Shen,Jiansheng Li,Jinyou Shen,Xiuyun Sun,Weiqing Han
Industrial wastewater containing organic ligands and heavy metals is considered a serious public health threat, and its treatment and purification have become challenging tasks. Moreover, the organic-chelated heavy metals formed by common organic ligands and free heavy metals can cause many problems and concerns because of their poor biodegradability, high solubility, and extreme stability. In this study, aluminum-containing ferrihydrite (Fh-Al) adsorbents of different composition molar ratios were prepared and utilized to remove typical EDTA-Cr(III) in an aqueous system, and the associated removal mechanism was examined. The experimental results show that adding Al not only enhances the removal rate of EDTA-Cr(III) by the Fh-Al adsorbent in a wide pH range (pH = 3–9) but also increases the maximum adsorption capacity of EDTA-Cr(III). In addition, the specific surface area of Fh-Al can be increased by adding aluminum with different molar ratios, thus promoting its adsorption performance for EDTA-Cr(III). Furthermore, surface complexation and electrostatic attraction were proposed as possible mechanisms of EDTA-Cr(III) adsorption by Fh-Al. This study shows that Fh-Al-6 adsorbent can adsorb common EDTA-chelated heavy metals (such as EDTA-Pb, EDTA-Cr, EDTA-Cu and EDTA-Cd) in one step, with maximum adsorption capacities of 41.47, 32.33, 16.51 and 31.27 mg/g at pH = 3. The Fh-Al-6 adsorbent can be reused after being regenerated in a 2 g/L Na 2 SO 4 solution. This study provides new expectations for treating wastewater containing organic groups and heavy metals.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Weiquan Yuan,Jingzhong Kuang,Mingming Yu,Zheyu Huang,Xiaoyuan Wang,Junjie Xiao,Shaoyan Zhang,Hao Cheng,Yiqiang Yang
Removal of aluminum ion from rare earth ions solution by selective adsorption was one of the promising methods for green enrichment of the acidic rare earth solution containing aluminum ions. Herein, a series of ZnS polymorphs/halloysite composites and Wurtzite/Halloysite (WZ@Hal) with different wurtzite content were prepared by facile one-step hydrothermal method using halloysite as the substance. The phase composition, microstructure and specific surface area of the WZ@Hal composite were characterized and the selective adsorption behavior of the WZ@Hal composite for aluminum and rare earth ions under different conditions was studied. The results showed that WZ@Hal composite loaded with hexagonal wurtzite showed good adsorption selectivity for Al(III) with a spontaneous exothermic process, while SP@Hal composite loaded with cubic sphalerite displayed no obvious adsorption capacity for both Al(III) and Er(III) with an endothermic process. The WZ@Hal composite was synthesized through strong electron interaction between sulfur atoms of wurtzite with oxygen atoms on the surface of halloysite. The WZ@Hal exhibited a fast adsorption rate a fast adsorption rate (k 2 was 0.0713 g⋅mg −1 ⋅min −1 ) and an excellent selectivity coefficient (K s was 237). The adsorption process of WZ@Hal for Al(III) in mixed solution was described by the pseudo-second-order kinetic model and controlled by the chemisorption. WZ@Hal showed excellent regeneration and maintained high selective adsorption performance in adsorption–desorption process. The adsorption mechanism was that aluminum ions were adsorbed by electron interaction with sulfur atoms of wurtzite and oxygen atoms of halloysite at the interface of the wurtzite and halloysite. WZ@Hal composite showed excellent selective adsorption performance in the adsorption and separation process of acidic mixed solution of aluminum ion and rare earth ions.
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高影响因子
CORROSION SCIENCE
·
2023
·
IF 8.3
Zhichao Shang,Xiaoping Cai,Farshid Pahlevani,Yan Zheng,Akbar Hojjati-Najafabadi,Xinran Gao,Baojing Zhang,Peizhong Feng
High porosity Co-Al-Fe intermetallic with 3D-microstructures were one-step synthesized via a novel thermal explosion reaction. A link between pore structure and permeability was established using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was investigated at 900 °C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the pore structure of the samples remains stable, and the internal matrices are intact due to the formation of a thin protective layer of Al 2 O 3 and Fe 2 O 3 on the surface of the product skeleton. In addition, inward diffusion of S leads to the formation of FeS nodules.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Liyuan Wang,Liyuan Xie,Lingli Dong,Zhitao Wang,Linpo Li,Enbo Shangguan,Jing Li,Shengbo Gao
Novel structural designs for metal organic frameworks (MOFs) are expected to improve ion-transport behavior in composite solid electrolytes . Herein, upper-dimensional MIL-53(Al) nanofibers (MNFs, MIL-53 belongs to the MIL (Material Institute Lavoisier) group) with flower-like nanoflake structures have been designed and constructed via modified hydrothermal coordination. The optimized MNFs with high surface area and porosity can form abundant interfaces with poly(ethylene oxide) (PEO) matrix. The plasticization of MNFs to the PEO matrix will facilitate segmental movement of PEO chains to facilitate Li + conduction. The unsaturated open metal centers of MNFs can effectively capture bis(trifluoromethanesulfonyl)imide anions (TFSI − ) to deliver more free lithium ions for transfer. Moreover, the upper-dimensional nanofiber structure endows lithium ions with a long-range and consecutive transport pathway. The obtained composite solid electrolyte (MNFs@PEO) presents a high ionic conductivity of 4.1 × 10 −4 S cm −1 and a great Li + transference number of 0.4 at 60 °C. The electrolyte also exhibits a stable Li plating/stripping behavior over 1000 h at 0.1 mA cm −1 with inhibited Li dendrite growth. Furthermore, the Li/LiFePO 4 and Li/LiNi 0.8 Mn 0.1 Co 0.1 O 2 batteries with MNFs@PEO as electrolytes both display great cycling stabilities with high-capacity retention, indicating their potential applications in lithium metal batteries . The study will put forward new inspirations for designing advanced MOF-based composite solid electrolytes.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Bao-Feng Shan,Zhong Yang,Zong-Yan Zhao,Jin Zhang,Qing-Ju Liu
In this study, the focus revolves around the synthesis, characterization, and subsequent evaluation of CuMM’O 4 (M, M’ = Al, Ga, In) photoelectrocatalysts, notable for their distinct spinel- and delafossite-like structures. These novel materials are derived from a pseudobinary CuMO 2 -based solid solution. Specifically, the delafossite-like CuAlInO 4 and CuGaInO 4 manifest a trigonal superstructure within the R 3 ‾ m space group, defined by structural motifs comprising [InO 6 ] octahedra, [CuO 5 ] hexahedra, and [AlO 5 ] or [GaO 5 ] hexahedra. This study spans a comprehensive analysis encompassing optical properties, electrical characteristics, electronic structure, and the ensuing photoelectrochemical performancer. This exploration integrates experimental analyses and density functional theory calculations to discern the intricacies of these materials. The assessed CuMM’O 4 samples display favorable optical traits and band-edge positions conducive to facilitating visible-light-driven photoelectrochemical water-splitting. Among the evaluated samples, the delafossite-like CuGaInO 4 photocathode stands out due to its notably elevated carrier density and reduced resistance for carrier transport, distinguishing it from CuAlGaO 4 and CuAlInO 4 . Consequently, it exhibits superior photoelectrochemical activity. CuGaInO 4 , serving as an unadorned photocathode, demonstrates a noteworthy photocurrent density of 8.6 μA/cm 2 under 0.61V RHE and 102.05 μA/cm 2 at 0.15 V RHE . Moreover, it achieves a peak incident photon-to-current efficiency of approximately 1.86 % at 0.61 V RHE under a 480 nm wavelength.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Lin Zhang,Fenglian Fu,Guangda Yu,Guangzhao Sun,Bing Tang
Ferrihydrite-humic acid co-precipitates have impacts on the adsorption and reduction of Cr(VI) in the natural environment. Besides, ferrihydrite-humic acid co-precipitates usually coexist with foreign metal cations like Al(III) and Mn(II), which may change the properties of ferrihydrite and affect the fate of Cr(VI). In this work, structurally incorporated Al(III) or Mn(II) in ferrihydrite-humic acid co-precipitates with Cr(VI) (Fh-HA-Cr-Al or Fh-HA-Cr-Mn) were prepared, and the behavior and phase transformation of co-precipitates were explored via the characterization analyses of samples during aging for 10 days. This study showed that partial adsorbed Cr(VI) was reduced to Cr(III) in the presence of humic acid , thereby reducing the toxicity of Cr(VI). Interestingly, two different results occurred because of the incorporation of Al(III) and Mn(II). Al(III) hindered the transformation of ferrihydrite and changed the aging products by inhibiting the dissolution of ferrihydrite, which decreased Cr to incorporate iron minerals. By contrast, doping of Mn(II) accelerated the phase transformation of co-precipitates, and was more conducive to the encapsulation and fixation of Cr. The results of this study can facilitate the understanding of the effects of Al(III) and Mn(II) on Cr(VI) fixation during the aging of Fh-HA-Cr.
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yong Liu,Yong Chen,Jinhua Deng,Jianlong Wang
Herein we prepared a novel nitrogen-doping aluminum-graphite (Al-Gr-N) composite and applied for generating and activating H 2 O 2 to treat the landfill leachate. The results showed that Al-Gr-N composite could significantly enhance H 2 O 2 yield by oxygen reduction reaction (ORR), about 3 times higher than that of aluminum-graphite (Al-Gr) composite, due to its abundant N species, higher content of defects carbon atoms, higher surface area and porous volume, which enhanced the activity and selectivity toward two-electron pathway of ORR by increasing electron density, and promoting the mass transfer of reaction intermediates. The H 2 O 2 concentration achieved 2049 mg/L. The H + from the hydrolysis of in-situ generated Al 3+ could improve the ORR process, leading to high efficient production of H 2 O 2 at wide pH range. The in-situ generated Al 3+ could act as the coagulant to enhance the pollutant removal. This composite could effectively treat landfill leachate due to its high H 2 O 2 and nascent aluminum.
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高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2019
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IF 7.181
Fan Zhou,Ningyi Pan,Hongyu Chen,Xiang Xu,Chunhao Wang,Yankun Du,Yang Guo,Zheng Zeng,Liqing Li
Ni-Mg-Al hydrotalcite-derived materials promoted with Ce, Zr or Fe were prepared by the co-precipitation method, which exhibited excellent performance in steam reforming of toluene (SRT) at low temperature. Especially, Fe-doped catalyst had higher catalytic activity and stability at 400 °C, which maintained almost 100% toluene conversion during the SRT reaction (3 h). Moreover, it also had higher hydrogen production and better selectivity for hydrogen production. The physico-chemical characterizations and model simulation indicate its high dispersion of active sites and accessibility of reactants to active sites: uniform dispersion of active sites (SEM, TEM and EDX), large specific surface area (151 m 2 /g), pore volume (0.84 cm 3 /g) and average pore diameter (22.1 nm), small crystallite size (34.9 nm), desirable Ni species reducibility (TPR), high basicity (TPD), low metal carbide formation (XPS), and good adsorption affinity with toluene (−18.391 kJ mol −1 , DFT). Moreover, less carbon was deposited on the Fe-containing catalyst through measuring the amorphous carbon and CNTs by the TG-MS method, which was due to the tip-growth mechanism of CNTs. Considering lower toluene conversion temperature, higher hydrogen yield, and better resistance to carbon deposition, this study may be meaningful in development of SRT at low temperature.
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高影响因子
Materials
·
2019
·Vol. 13
·期 1
·111
·
IF 2.972
Xia Zhao,Shuai Yuan,Zuquan Jin,Binbin Zhang,Nazhen Liu,Shibo Chen,Shuan Liu,Xiaolin Sun,Jizhou Duan
Given their outstanding versatile properties, multilayered anticorrosion coatings have drawn great interest from researchers in the academic and engineering fields. However, the application of multilayered coatings is restricted by some limitations such as low interlayer compatibilities, the harsh preparation process, etc. This work introduced a composite film fabricated on a 2A12 aluminum alloy surface, including an anodic oxide film, a sol–gel film, and a layer-by-layer (LBL) self-assembling film from bottom to top. The microstructure and elemental characterization indicated that the finish of the coating with the LBL film resulted in a closely connected multilayered coating with a smoother surface. The anticorrosion performance was systematically evaluated in the simulated corrosive medium and neutral salt spray environment. The integrated coating with the LBL film presented an excellent anticorrosion ability with system impedance over 108Ω·cm2and a self-corrosion current density two orders of magnitude lower than that of the other coatings. After the acceleration test in a salt spray environment, the multilayered coatings could still show a good protective performance with almost no cracks and no penetration of chloride ions. It is believed that the as-constructed multilayered coating with high corrosive properties and a fine surface state will have promising applications in the field of anticorrosion engineering.Keywords:multilayer;corrosion;impedance;layer-by-layer
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PubMed
高影响因子
危险品化学品经营许可证（带存储）