JOURNAL OF FLUORINE CHEMISTRY
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2024
·
IF 1.7
Xiaoli Wei,Yiwei Sun,Jianhai Jiang,Zhen Wang,Wei Zhang,Bing Liu,Shucheng Wang,Xiaodan Yang,Wanjin Yu,Jianjun Zhang,Wenfeng Han
Al 2 O 3 exhibits high activity for the resource utilization of potent greenhouse gases, hydrofluorocarbons via dehydrofluorination or F/Cl exchange. However, it experiences completely fluorination under corrosive HF environment, leading to thorough fluorination of F-Al-O active site into F-Al-F, accompanied with serious carbon deposition. In this work, we successfully confined Al 2 O 3 in SiC (Al 2 O 3 @SiC) via treating Al 2 O 3 /SiC under high temperatures (>800 °C). The results showed that different with simple loaded Al 2 O 3 (Al 2 O 3 /SiC), during high temperature treatment, reaction between Al 2 O 3 and SiC occurred, leading to the confinement effect. Then, contributed by the interaction, desired F-Al-O species could be stabilized on the surface of SiC. While for Al 2 O 3 /SiC, it thoroughly turned into AlF 3 under identical reactive conditions, leading to inferior stability during CH 3 CHF 2 dehydrofluorination. Furthermore, the reaction rate of 5 %Al 2 O 3 @SiC is nearly up to 4 folds higher than that of traditional AlF 3 . Facilitated by the suitable Lewis acid intensity, less carbon deposition formed on Al 2 O 3 @SiC. Thus, constructing strong interaction between F-Al-O and stable SiC provides a potential strategy to stabilize unstable active centers.
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高影响因子
APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Xiaolong Yan,Yuxuan Deng,Wanming Huang,Qijun Zhang,Li Zheng,Junfeng Zhou,Dongsheng He,Jiayu Ma
This study investigated LDHs-MgAl preparation factors on Gly adsorption performance. The single-factor experiments shown that CO 3 2− -type LDHs-400-MgAl prepared under the condition of calcination temperature of 400 °C, calcination time of 3 h, Mg/Al molar ratio of 2:1, synthesis pH of 10, preparation temperature of 30 °C and aging temperature of 25 °C, had better Gly adsorption performance due to its enhanced crystallinity and hierarchical porosity. Moreover, the Gly adsorption process optimization with LDHs-400-MgAl via the response surface methodology (RSM) was studied. The relative error between the actual value and the predicted value obtained from the RSM model is 0.39 % and the determination coefficient (R 2 ) is 0.9987, which means the Gly adsorption process with LDHs-400-MgAl can be predicted by the proposed RSM model. This work integrates material synthesis optimization with process engineering, offering a scalable strategy for Gly removal in complex wastewater matrices.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Lijia Huang,Ge He,Yi Yuan,Tian Cheng Zhang,Yan Wang,Shaojun Yuan
Rationally regulating the photogenerated carrier transfer behavior and band structure of TiO2 through metal doping is an effective strategy for enhancing the photocatalytic activity in the removal of malodorous gas hydrogen sulfide (H2S). In this study, TiO2 modified with the doping of Group IIIA metal ions (Al3+, Ga3+, and In3+) was utilized as an efficient photocatalytic desulfurizer under ultraviolet irradiation. Among these samples, the 4% In-TiO2 exhibited the best photocatalytic H2S removal efficiency of 100% for a duration of 120 min, nearly 3 times higher than that of commercial P25 TiO2. The UV–vis DRS and PL spectra demonstrated that the incorporation of Group-IIIA metal ions into TiO2 resulted in the formation of a shallow acceptor level above the valence band in the energy band structure, which induced a slight redshift at the edge of the visible light absorption band and reduced the electron–hole recombination rate. In situ DRIFTS and DFT calculations revealed that the adsorption and activation of H2S occurred simultaneously on In-TiO2, facilitated by its strong oxygen vacancy formation and adsorption capability. The ln3+ doping into TiO2 promoted photothermal-catalytic oxidation reaction on the surfaces of In-TiO2, thereby significantly enhancing the desulfurization efficiency of H2S. This study not only offers a deeper understanding of the regulated band structure of TiO2 by doping of Group IIIA metal ions, but also provides a promising and green photocatalytic desulfurizer of In-TiO2 for efficient removal of H2S.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhengde Wang,Zhengfeng Zhang,Xingkai Zhang,Rupeng Li,Yunxia Wang,Jin Li,Bin Zhang
The LiCoO2 cathode cannot maintain stable battery cycling under high voltage, as the undesired release of lattice O and harmful surface side reactions compromise its structural stability, resulting in battery capacity degradation. Herein, inspired by architectural engineering, we proposed a surface–bulk structure dual-reinforced strategy to tackle the aforementioned challenges by room-temperature Al-induced engineering, which could achieve surface disordering and phosphating and bulk gradient Ni doping of the LiCoO2 cathode. Such a multifunctional structure could delay the detrimental transition, restrain lattice O loss, reduce harmful surface side reactions, and form a phosphate-rich CEI with high ionic conductivity and stability. The as-prepared modified LiCoO2 as the cathode in lithium-ion batteries displayed remarkably enhanced cycle stability than bare LiCoO2 (91.9% vs 45.3% after 100 cycles in 3.0–4.6 V at a current density of 1 C). Even at a 5 C high rate, the modified LiCoO2 cathode also displayed superb battery cycling (92% after 100 cycles at 3.0–4.6 V). This room-temperature Al-induced engineering is universal to other layered cathode materials.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Jiahui Liu,Xinchao Li,Min You,Hanjie Wen,Ziyuan Zhou,Zhiqi Liu
Eliminating harmful Cu 2+ from tainted water is still a major environmental problem. In this study, we achieved efficient removal of Cu 2+ from the solution by Na Li co-doped P zeolite (NLPZ), which was synthesized by template-free method. This method fully utilizes the Si/Al ratio in clay-type lithium ore, achieving high utilization rates of Si (94.72 %) and Al (96.62 %). Simultaneously, benefiting from the synergistic contribution of the synthesis stage and subsequent ion exchange, the overall lithium retention rate reaches as high as 82.60 %. The NLPZ exhibited exceptional Cu 2+ adsorption capacity (139.31 mg/g at 25 °C) through a dual mechanism: (1) ion exchange and (2) hydroxyl-mediated surface complexation. Adsorption followed pseudo-second-order kinetics and the Langmuir isotherm consistent with monolayer chemisorption, while thermodynamic analysis revealed endothermic behavior (ΔH = 5.9108 kJ/mol). In addition, the NLPZ maintained 94 % adsorption capacity after five regeneration cycles, demonstrating superior stability. This work provides an eco-friendly and scalable strategy for treating copper-contaminated wastewater by synergizing the efficient extraction of Si/Al from ore with the template-free synthesis of P-type zeolites.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Longxiangyu Cheng,Zuwei Xu,Haibo Zhao
To address the trade-off between CO 2 conversion and methanol selectivity inherent in Cu-ZnO based catalysts and mitigate the drawbacks of wet chemical synthesis methods, in this study, Cu/ZnO/Al 2 O 3 catalysts with high methanol selectivity were developed for CO 2 hydrotreating to methanol using a mechanochemical method suitable for industrial scale preparation. Combining CuO and ZnO precursors of different sizes (micronscale or nanoscale), four catalyst variants were prepared by a mechanochemical method combining ball milling and auto-combustion of citric acid, which compared with commercial catalyst prepared by co-precipitation method. Characterizations of the catalysts structure and element distribution indicate that due to the different thermal decomposition kinetics of copper citrate and zinc citrate during the calcination process, the surface Zn content of the ball milling catalysts significantly increase, thereby promoting the formation of the Cu-ZnO x interface. Among them, the catalyst of plain CuO + nano ZnO shows the best performance (0.4 g MeOH •g cat -1 •h −1 ). Although its CO 2 conversion is lower than that of commercial catalyst, it has better methanol selectivity and produced higher methanol space–time yield which remained stable during the 30 h stability test. In addition, H 2 -TPR and CO 2 -TPD experimental results show that although mechanical mixing resulted in ball milling catalysts with large copper grains, more oxygen vacancies and moderately strong basic sites enhanced Cu-ZnO synergism, inhibited the reverse water–gas shift (RWGS) reaction, and facilitated methanol synthesis.
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THERMOCHIMICA ACTA
·
2025
·
IF 3.5
Zhong-xuan Han,Hao Liu,Zhan-jun Yang,Yi-fan Guo,Shu-na Zhao,Mi Li,Lin Jiang,Andrei Rotaru
Aluminised thermites show strong potential for energy-intensive applications, but ensuring stable nanoscale dispersion and optimising combustion performance is challenging. This study prepared Al–MO/PVDF thermites (MO = ZnO, ZnFe₂O₄) by electrospraying and mechanical mixing to compare how particle morphology and compositional uniformity affect reactivity. Electrosprayed samples formed near-spherical, submicron particles with homogeneous distributions of reactants, whereas mechanically mixed samples aggregated into larger, irregular clusters. Differential scanning calorimetry revealed sharper, staged exothermic peaks in the electrosprayed thermites, indicating enhanced reactant contact, while the mechanically mixed thermites produced broad, overlapping exotherms. X-ray diffraction showed partial amorphisation and core-shell formation under rapid solvent evaporation. Laser ignition tests demonstrated faster ignition, higher flame temperatures, and more intense combustion in electrosprayed formulations, particularly Al–ZnFe₂O₄/PVDF, which exhibited a secondary heat release (micro-explosion). Electrospray-assisted fabrication improved homogeneity and promoted rapid, high-temperature reactions for enhanced combustion performance.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shikai Li,Hanbing Gao,Rui Xu,Zhaohui Guo
Cation and oxyanion heavy metals possess opposite physical and chemical properties, which could be hard to simultaneous remediate in soil. In this study, layered double hydroxides from secondary aluminum ash (SAA-LDH) has been synthesized for soil remediation contaminated with heavy metals. The as-obtained SAA-LDH exhibit strong affinity for heavy metals, which could remove 193.50 mg‧g −1 of Cr(Ⅵ) and 175.84 mg‧g −1 of Cd(Ⅱ) within 2 h. Optimum acid-base resistance and selectivity guarantee the practice potential of SAA-LDH, which could remove above 85 % of Cd(Ⅱ) and Cr(Ⅵ) under widely pH range (from 4.00 to 10.00), capturing above 90 % of Cd(Ⅱ) and Cr(Ⅵ) under the interference of seven coexisting ions. Soil remediation tests and column leaching experiments further demonstrate that SAA-LDH could immobilize 98.32 % of Cd(Ⅱ) and 97.71 % of Cr(Ⅵ), preventing its migration. Density functional theory (DFT) manifests that SAA-LDH could remove Cd(Ⅱ) and Cr(Ⅵ) through isomorphic substitution and ion exchange respectively under single system. Under compound system, Cd(Ⅱ) fixed with isomorphic substitution could promote the immobilization of Cr(Ⅵ) onto SAA-LDH, constructing hyper-stable coordination structure. This study provides an effective approach to simultaneously recycle hazardous waste and remediate heavy metals contamination in soil.
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DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Kang Li,Guoge Zhang,Wenfang Li,Shuoxun Jin,Ken Chen,Aihua Yi,Zhongmiao Liao,Wen Zhu,Yi Huang,Zhisheng Zhu,Min Wang,Jiajing Yang,Rujian Liang
The as-deposit (AD) and heat-treated (HT) Al-Cu alloy obtained via wire arc additive manufacturing (WAAM) technology was coated by plasma electrolytic oxidation (PEO), respectively. The reticular big Al 2 Cu grains in the AD Al alloy substrate evolved into numerous small particles and nano precipitates after the heat treatment. The thickness and surface roughness of the PEO coatings on both substrates were increased gradually with the increase of oxidation time. The coating on the HT Al alloy was deposited faster with a rougher surface structure. Although most Al 2 Cu grains were dissolved in the electrolyte at the earlier oxidation stage, some Cu-containing compounds and metallic Cu were gradually deposited in the coatings at the discharge spark oxidation period. The coatings were mainly composed of γ-Al 2 O 3 and α-Al 2 O 3 , and the ratio of α-Al 2 O 3 was increased obviously with the oxidation time. Besides, the coating on the HT sample consisted of a higher ratio of α-Al 2 O 3 than that on the AD alloy, especially at the end of PEO processing. The PEO coatings were made up of two sub-layers, a thin compact inner layer and a porous outer layer. In comparison, the coating on the HT alloy was a bit denser and more uniform. The substrates displayed a adhesion wear trait while the coated samples shew a slight abrasive wear manner over the abrasion test, with a still ball as the friction pair . and the coated HT alloy had a better wear resistance than the coated AD alloy did.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2024
·
IF 4.7
Liu-bin SONG,Tian-yuan LONG,Min-zhi XIAO,Min LIU,Ting-ting ZHAO,Yin-jie KUANG,Lin JIANG,Zhong-liang XIAO
A composite solid electrolyte comprising a Cu−Al bimetallic metal-organic framework (CAB), lithium salt (LiTFSI) and polyethylene oxide (PEO) was fabricated through molecular grafting to enhance the ionic conductivity of the PEO-based electrolytes. Experimental and molecular dynamics simulation results indicated that the electrolyte with 10 wt.% CAB (PL-CAB-10%) exhibits high ionic conductivity (8.42×10 −4 S/cm at 60 °C), high Li + transference number (0.46), wide electrochemical window (4.91 V), good thermal stability, and outstanding mechanical properties. Furthermore, PL-CAB-10% exhibits excellent cycle stability in both Li−Li symmetric battery and Li/PL-CAB- 10%/LiFePO 4 asymmetric battery setups. These enhanced performances are primarily attributable to the introduction of the versatile CAB. The abundant metal sites in CAB can react with TFSI − and PEO through Lewis acid–base interactions, promoting LiTFSI dissociation and improving ionic conductivity. Additionally, regular pores in CAB provide uniformly distributed sites for cation plating during cycling.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yawen Cai,Yapeng Ma,Jinghua Feng,Mingyu Zhu,Xin Wang,Zhimin Lv,Ming Fang,Xiaoli Tan,Xiangke Wang
The efficient treatment of uranium (U) is an important and challenging issue regarding radioactive wastes management. Adsorbent with high efficacy, low-cost is urgently needed for alleviating the contamination of U-containing wastewaters. To solve these issues, we report a series of phytic acid (PA) modified Zn-Al-Ti layered mixed metal oxides (Zn-Al-Ti LMO@PAs) in this work, which shows the adsorption capacity as high as ∼1486 mg/g and could be easily obtained through a facile post-modification method. The adsorption performance of Zn-Al-Ti LMO@PAs for U(VI) are carefully estimated through batch experiments. With the aid of batch experiments and various characterization techniques, PA in Zn-Al-Ti LMO@PAs is found to make the most contribution for the chelation of U(VI), which favors for the adsorption selectivity and capability. The Zn-Al-Ti LMO@PAs are potential cost-effective adsorbents to remove the U(VI) in wastewaters.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 50
·31466-31474
·
IF 3.108
Jun Qu,Xiaoman He,Xuewei Li,Ziqiang Ai,Yujie Li,Qiwu Zhang,Xinzhong Liu
An amorphous photocatalyst was prepared via simple dry milling of Zn basic carbonate (Zn4CO3(OH)6·H2O) and Al hydroxide (Al(OH)3) as a precursor of Zn–Al layered double hydroxide (LDH) and the precursor was agitated in water to simply synthesize the Zn–Al LDH for comparison. The adsorption and photocatalytic activity of the Zn–Al LDH and the precursor were studied via the removal of methyl orange (MO) and decoloration of MO under ultraviolet light irradiation in aqueous solution, respectively. The precursor exhibits much higher decoloration efficiency towards MO than the Zn–Al LDH product because of the synergistic effect of the intercalation reaction and its photocatalytic activity. The amorphous precursor could easily incorporate MO molecules to form MO intercalated LDH, allowing easy access of the organic pollutant to the photocatalyst sample, resulting in an obvious improvement in photocatalytic performance. The novel idea to use the precursor sample instead of the synthesized final product may be applied in other fields to increase the required performances.
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危险品化学品经营许可证（带存储）