INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Yajun Wang,Shaojie Zhang,Qiang Gan,Zhengliang Deng,Wenyu Li
To investigate the effect of Ni on the performance of Al/Fe 2 O 3 thermite, Ni was introduced into the system, and an Al/Ni/Fe 2 O 3 ternary composite thermite (Al/Ni/Fe 2 O 3 -EPD) was successfully fabricated via electrophoretic deposition (EPD). A systematic comparison was conducted with physically mixed (PM) samples (Al/Ni/Fe 2 O 3 -PM). The morphology, structure, and thermal behavior of the samples were characterized by SEM-EDS, XRD, and TG-DSC analyses. The results indicate that the EPD-fabricated samples exhibit a dense structure and a more uniform component distribution, whereas the physically mixed samples show pronounced agglomeration of Ni. Thermal analysis demonstrates that the incorporation of Ni enhances the thermal stability of the thermite but suppresses the energy release process. Non-isothermal kinetic analysis further reveals that Ni reduces the overall reaction activity of the system, and EPD does not lead to a reduction in the activation energy of the Al/Ni/Fe 2 O 3 system. Mechanistic studies indicate that the reaction of Al/Ni/Fe 2 O 3 -EPD in air involves the thermite reaction between Al and Fe 2 O 3 , the direct oxidation of Al, Ni, and Fe, and the alloying reaction between Al and Ni. This work systematically evaluates the effects of the EPD process and Ni fuel addition on the performance of the Al/Fe 2 O 3 thermite system. By comparing the results with reported Al/B/Fe 2 O 3 and Al/Ti/Fe 2 O 3 systems, the study elucidates the synergistic and differentiated mechanisms of various composite fuels in thermite reactions, providing useful insights into the structural design and mechanistic investigation of multicomponent composite thermites.
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2023
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IF 5.5
Shaoqing Wang,Yan Jiao,Zhihe Li,Zhen Wan,Yu Han,Weiming Yi
In this paper, a surface encapsulation method has been developed to synthesize the HZSM-5 @Al-KIT-6 hierarchical zeolites, due to the poor mono-aromatic hydrocarbons (MAHs) selectivity and rapid coke deactivation during the catalytic upgrading lignin pyrolysis vapors. Results showed that the acidity and accessibility of HZSM-5 @Al-KIT-6 hierarchical zeolite can be modulated by changing the TEOS/HZSM-5 mass ratio during catalyst synthesis. The three-dimensional (3-D) cubic mesoporous shell can capture the bulky phenolic oligomers and pre-crack for further reforming. The highest MAH content (44.03%) and lower polycyclic aromatic hydrocarbons (PAHs) (23.79%) were produced when the TEOS/HZSM-5 mass ratio was 1.0. The hierarchical zeolites improved the yield of xylenes due to the enhanced alkylation reaction. In addition, the micro-mesoporous highway reduced the formation of coke deposition. The catalytic mechanism of hierarchical zeolites was then proposed based on the obtained results. This study provides a reference for pilot-scale experiments for the catalytic upgrading lignin pyrolysis vapors.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yi Ren,Naiwen Li,Jun Li,Weiming Zhang,Chao Liu,Bo Lai
Iron based Fenton-like processes have been widely investigated, while how to regulate active species generation still is a problem of concern. In this study, MILs(Al) with various carboxyl group amounts were used as research tools, loading iron for Fenton-like oxidation, to investigate the effect of free carboxyl group on surface or free HO generation. Active species identification indicates that surface and free HO were main active species for carbamazepine removal. Moreover, it was concluded that contribution of free HO for the decontamination was positively correlated with carboxyl group amounts on MILs(Al). With free carboxyl group amounts increasing from 3.07 to 5.09 mmol/g on MILs(Al)-Fe, concentration of free HO for carbamazepine removal increased from 47.4% to 62.5%. The mechanisms of carboxyl group amounts impact the chemical state of HO was proposed as steric hindrance effect and charge density near iron sites. The destruction of carbamazepine was proposed in different systems by intermediates determination, and the results indicate that the existing form of HO mainly influenced the efficiency of pollutant degradation, rather than oxidation mechanisms of it. Various pollutants degradation in different MILs(Al)-Fe catalyzed Fenton-like systems were investigated as well, to understand the superiority of different HO for decontamination. MILs(Al)-Fe with various carboxyl group amounts catalyzed Fenton-like processes could remove 34.2%–73.0% carbamazepine, 56.7%–93.8% sulfamethoxazole, 36.4%–75.6% bisphenol S and 43.8–79.7% salicylic acid. This study understood the regulation of active species by carboxyl group in MILs(Al)-Fe/H 2 O 2 systems, and sheds new light on active species precise regulation in Fenton-like systems.
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APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Xiaoqi Zhao,Yingxiao Li,Xue Zhang,Yanfang Gao,Ling Liu
Surface oxygen vacancy increases active site numbers, and multidimensional cross-linked structure improves the exposure of active sites. Thereby, they can enhance the oxygen reduction reaction (ORR) performance of Fe-N-C catalysts effectively. Herein, Fe(NO 3 ) 3 ·9H 2 O and carbon nanotubes (CNTs) were introduced into zeolitic imidazolate framework nano leaves (ZIF-L) to prepare multidimensional cross-linked Fe-N-CNTs with surface oxygen vacancies through co-pyrolysis at the high-temperature. As expected, the synthesized multidimensional cross-linked Fe-N-CNTs-900-0.2 composite rich in oxygen vacancies increased the conduction band potential and improved the reducing capacity. Thus, Fe-N-CNTs-900-0.2 possessed a better ORR electrochemical performance (half-wave potential = 0.892 V vs. RHE) that surpass the Pt/C catalysts. Moreover, the Al-air batteries containing Fe-N-CNTs-900-0.2 displayed a higher maximum power density than those of Pt/C catalysts. The electronic band structure shows that Fe-N-CNTs-900-0.2 rich in oxygen vacancy concentration has higher conduction band potential and effectively improves the activity of ORR catalysts. This work innovatively proposes that the joint work of multidimensional cross-linked structure and oxygen defects is an effective method to enhance the ORR performance and clarifies its internal reaction mechanism, which provides a new idea to design and preparer Fe-N-C catalysts.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Wenke Liu,Qingwei Qin,Hailin Zhang,Xing Chen,Ling Luo,Guangqiang Li,Shili Zheng,Ping Li
The conventional neutralization method for removing impurities Fe(III) and Al(III) from spent Li-ion battery (LIB) leaching solutions has encountered problems of low impurity removal efficiency or high loss of valuable metals. In this study, highly selective and effective separation of Fe(III) and Al(III) from spent LIB leaching solutions was achieved by the precipitation–complexation technology. It was found that almost all Fe(III) together with most of the Al(III) could be removed by preferential precipitation using NaHCO3 neutralization under an equilibrium pH of 3.3 at 95 °C. Phytic acid, as a selectively complexing agent, was then introduced to completely remove the residual Al(III) from Fe-removed solutions with an Al/PA molar ratio of 3:1 at 60 °C. As a result, more than 99.5% Fe(III) and 97.08% Al(III) could be removed from the actual solutions, with a total loss of Ni, Co, Mn, and Li of only 1.1%. Furthermore, the obtained Al-phytates could be decomposed to form Al(PO3)3 products at 1000 °C. The whole process not only realized the efficient removal of Al(III) and Fe(III) at low pH with minimal loss of Ni, Co, Mn, and Li but also reduced the emission of wastes and utilized the Al resources.
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Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Jiangfu Zheng,Yaocheng Deng,Changzheng Fan,Xiaoming Li,Daoxin Gong,Changwu Li,Ziyi Ye
The construction of an S-scheme heterojunction is an effective way to enhance the photocatalytic activity of composite materials. Thus, a co-precipitation method is combined with a hydrothermal synthesis method in this study to synthesize an S-scheme heterojunction of Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH photocatalyst with an exceptional morphology like a coral reef. On this basis, an AP0.5BWLDH0.3/PMS/Vis reaction system is constructed. The prepared Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composites present better oxidation performance than pure Bi 2 WO 6 , Zn-Al LDH and Ag 3 PO 4 , with 100% Nitenpyram (50 mg/L) degraded within 90 min due to the photocatalytic activation of peroxymonosulfate. The significant increase in photocatalytic activity is not only due to the uniformly distributed coral reef-shaped nanostructures but also the extended life of the carrier with strong redox capability through S-scheme heterojunction. During the simulated exposure to sunlight, the internal electric field, optimized energy band structure, as well as coulomb force interaction all contributed to the promotion of the transportation of electron-hole pairs in the Bi 2 WO 6 /Ag 3 PO 4 /Zn-Al LDH composite. For this reason, electrons and holes have high reducing and oxidizing properties, which make the composites have high redox capacity. Then the radical trapping experiments, ESR testing and XPS analysis were used to verify these results. It was revealed that the S-scheme heterojunction mechanism was suitable for the electron migration in a photocatalyst. This study extends the design and preparation ideas of new S-scheme heterojunction photocatalysts and then proposes effective strategies to solve future water pollution .
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FUEL
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2022
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IF 8.035
Shuai-Zhong Wang,Binbin Huang,Shuwen Chen,Pei-Jin Liu,Wei Li,Qi-Long Yan
In this paper, energetic combustion catalysts doped core–shell Al@PVDF/AP composites have been fabricated via a spray-drying method, where three kinds of graphene-based energetic coordination polymers (GECPs, GO-CHZ-Co, GO-CHZ-Ni and GO-CHZ-Cu) are employed. These composites have been characterized comprehensively in terms of morphologies, thermal decomposition behaviors, energy density, combustion performances and condensed combustion products (CCPs). The results show that the GO-CHZ-Co and GO-CHZ-Cu could increases the heat of explosion for Al@PVDF/AP composites from 6885.2 J·g −1 to 7491.0 J·g −1 and 7390.1 J·g −1 , respectively, which are 8.8 % and 7.3 % higher than the blank reference samples. Moreover, the burn rates for these composites decrease when GO-CHZ-Co or GO-CHZ-Ni is included, indicating that these composites are promising candidates with improved energy density even unusually with decreased burn rates.
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INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Shaoqing Wang,Zhihe Li,Weiming Yi,Peng Fu,Xueyuan Bai
Catalytic pyrolysis of corn cob lignin were preformed using a tailored HZSM-5 @Al-SBA-15 hierarchical zeolite for the production of value-added aromatic hydrocarbon. Resulted showed that the highly ordered two-dimensional p6mm mesoporous shell could uniformly form on the surface of HZSM-5 core phase. The porosity and acidity of the HZSM-5 @Al-SBA-15 could be tailored by adjusting the TEOS/HZSM-5 mass ratio in the synthesis process. The aromatic hydrocarbon components regulated due to pre-cracking and enhanced diffusion via the mesoporous shell, as well as the retained shape-selectivity of the HZSM-5 core. Herein, the relative content of MAHs reached 45.02% with fewer poly-aromatic hydrocarbons (PAHs) of 25.91% when the TEOS/HZSM-5 mass ratio of 1.0. However, the length of the diffusion path had a certain impact on the anti-coking behavior. The catalytic stability of the hierarchical zeolites was also improved, with less coke formation than HZSM-5 alone. This work demonstrates that using a tailored hierarchical zeolite to regulate aromatic hydrocarbon components is feasible, and provide a reference for the practical application of agricultural crop wastes.
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JOURNAL OF POWER SOURCES
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2023
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IF 9.2
Xuyang Wang,Huihui Luo,Tao Liu,Lili Zhang,Zigeng Liu,Luxia Bu,Wei Wang
As a high-power battery system, Al-air batteries exhibit a wide range of potential applications. However, Al-air batteries are susceptible to significant open-circuit corrosion of the aluminum electrodes when removed from the electrolyte during standby, resulting in the formation of a dense film of corrosion products on the aluminum electrode surface . This, in turn, impedes the re-discharge performance of Al-air batteries. Based on an electrode/electrolyte interface adjustment strategy, mannitol is used as the additive to be added into 4 M KOH solution to improve re-discharge performance. Experimental analyses and theoretical calculations reveal that the inclusion of mannitol enhances the re-discharge performance of Al-air batteries through a combination of hydrogen bonding and adsorption. Importantly, it is noted that mannitol has minimal impact on the battery power density. The reason for the improvement is explained reasonably by a proposed mechanism. These findings offer valuable insights for the development of Al-air batteries with high performance.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Ning Ma,Xitao Wang,Xuemei Liu,Ningyan Li,Yuan Liu
Inhibiting the sintering of Cu-based catalysts for CO2 reverse water–gas shift (RWGS) reaction is still a great challenge. Herein, Cu–Al spinel supported on Al2O3 was prepared by a surface solid reaction and used as a precursor to obtain Cu particles with high dispersions and high stabilities. Due to the high dispersions of Cu cations in Cu–Al spinel, strong chemical interactions between Cu particles and newly generated Al2O3, and the isolation effects of Al2O3 particles, Cu particles derived from Cu–Al spinel exhibited smaller sizes after H2 reduction, excellent activities, and 300 h stabilities for RWGS reactions. However, Cu particles obtained from the supported CuO precursor showed much larger particle sizes (>70 nm) and inferior activities and stabilities for CO2 reverse water–gas shift reaction. This study made a successful attempt to enhance the activities and stabilities of Cu-based catalysts through changing the oxide precursor.
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ELECTROCHIMICA ACTA
·
2023
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IF 6.6
Chenjing Shi,Zijie Liu,Zhen Tian,Dan Li,Yanjun Chen,Li Guo,Yanzhong Wang
MXene nanosheets are one of the most promising supercapacitor electrode materials due to their excellent conductivity and redox activity. However, the balance of high capacity and rate performance of MXene nanosheets are still a big challenge due to their easy re-stacking, especially with a high mass loading. Here, the 3D MXene@graphene (MXene@rGO) hydrogel with high ion accessibility is engineered by Al-induced self-assembly of MXene and GO nanosheets. Trace acid solution is used as the initiator to etch the blunted aluminum oxide layer and release the Al 3+ ions, which acts as the linker to assemble nanosheets into 3D structure. At the same time, the mechanical strength of the hydrogel is further enhanced via the reduction of GO induced by Al. The MXene@rGO hydrogel exhibits a maximum area capacitance of 4.33 F cm −2 at 10 mA cm −2 and maintains a high area capacitance of 1.76 F cm −2 at 1000 mA cm −2 , indicating the high capacitance retention of 40.6%. Remarkably, the constructed asymmetric supercapacitor shows a high cyclic stability with a mere 8.37% decrease after 100,000 cycles, indicating the excellent application prospect.
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Rui Zhao,Cheng Cheng,Xiurong Wu,Xueyan Bai,Fenghuan Wang
Due to the excellent pore structure , MOFs as the stationary phase was playing an important part in chromatography . In this work, the shell-core MIL-101(Al)@SiO 2 composites post-synthetic modified by ligands with different polarities were fabricated for separation of estrogens. The structure and morphology of these materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET). In order to investigate the influence of the ligand polarity on chromatographic separation performance of estrogens, alkyl molecules with different chain length were introduced as the ligands. With the hydrophobicity and chain length of the ligands increasing, the resolutions of the MIL-101(Al)@SiO 2 columns for the separation of estrogens exhibited the tendency of a parabola. Best result was achieved on the C4-MIL-101(Al)@SiO 2 column. On that basis, the possible retention mechanism on C4-MIL-101(Al)@SiO 2 column was elucidated by studying the mobile phase effect on separation behavior.
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