Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121220
·
IF 7.2
Mengjiao Yu,Xiong-Fei Zhang,Mengjie Li,Jianan Song,Jianfeng Yao
The valorization of cellulose into valuable platform chemicals necessitates efficient and sustainable catalytic systems, where the acid-base properties of catalysts are critical for directing reaction pathways. This work presents the one-pot synthesis of a series of aluminum-based metal-organic frameworks (MIL-53) with tunable acid-base functionalities, achieved by modulating organic linkers. The successful formation of cooperative acid-base sites was confirmed by comprehensive characterization, including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and pyridine adsorbed infrared spectra. Catalytic performance evaluations demonstrated that acid-base cooperative sites significantly enhance the oriented conversion of cellulose to 5-hydroxymethylfurfural (5-HMF). Under optimal conditions (190 °C, 8 h) in a tetrahydrofuran (THF)/NaCl-H 2 O biphasic system, MIL-53-NH 2 /SO 3 H yielded 63.8 % 5-HMF, 6.3 % levulinic acid (LA), and 23.9 % formic acid (FA). The catalytic transformation of cellulose is a cascade process encompassing hydrolysis of cellulose to glucose, isomerization of glucose to fructose, dehydration to 5-HMF, and rehydration of 5-HMF to LA and FA. These results provide a promising strategy for designing efficient acid-base bifunctional catalysts for biomass conversion.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Tingting Lei,Yating Xu,Siyi Tan,Jiafu Xiao,Shaojing Zhao,Minhuan Lan
The widespread use of chlortetracycline (CTC) in agriculture and aquaculture has raised significant concerns regarding environmental contamination and human health risks. There is a critical demand for developing rapid, sensitive, and selective detection techniques for CTC identification. In this study, we introduced a smartphone-integrated ratiometric fluorescent sensor utilizing Al-doped carbon dots (Al-CDs), which were synthesized through a straightforward one-pot hydrothermal method. CTC quenches Al-CDs' fluorescence at 400 nm via the inner filter effect. Concurrently, a distinct fluorescence signal at 500 nm emerged, resulting from the enhanced intrinsic fluorescence of CTC upon its chelation with Al 3+ on the surface of Al-CDs. This ratiometric fluorescence spectral response enables a visible color shift from blue to green upon UV irradiation. The constructed sensor achieves a remarkable detection limit of 0.17 μM and displays exceptional specificity toward CTC among other antibiotics, metal ions and amino acids. Successful application in real water samples yielded satisfactory recovery rates (98.5–110.6%), highlighting the potential of this smartphone-integrated platform for on-site and quantitative CTC detection.
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高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 15
·8301-8312
·
IF 3.917
Li Xiangping,Liu Juping,Zhang Jianguang,Liu Bin,Ma Wenchao,Wang Chuanbin,Chen Guanyi
Lignocellulosic biomass-derived bio-oil is considered as a promising renewable biofuel. In this paper, incipient wetness impregnation method, ammonia grafting method and direct synthesis method were employed as nickel loading methods for the preparation of Ni/Al-SBA-15 catalysts. The effects of these nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were studied. The structure of Ni/Al-SBA-15 was significantly influenced by the nickel loading methods, including the specific surface area, the pore volume, the wall thickness and so on. Nickel loading methods also affected the actual nickel content of nickel-based catalysts. Unsuccessful loading of nickel species was observed during the preparation of Ni/Al-SBA-15 using direct synthesis method. The conversion of eugenol and selectivity of products after hydrodeoxygenation in n -dodecane over Ni/Al-SBA-15 catalysts were investigated. Results showed that the conversion of eugenol nearly reached 100% for all the reaction, but the composition of product was significantly different when using different Ni/Al-SBA-15 as hydrodeoxygenation catalyst. The reaction pathway of eugenol hydrodeoxygenation in n -dodecane was also speculated in this paper. Graphic Effects of nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were investigated. For the liquid phase hydrodeoxygenation of eugenol to hydrocarbon, catalysts prepared by ammonia grafting method exhibited the highest catalytic activity.
研究领域:
催化化学
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可再生能源
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生物质转化
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材料科学
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Mineral Processing and Extractive Metallurgy Review
·
2017
·
IF 1.219
Wencui Chai,Yanfang Huang,Guihong Han,Jiongtian Liu,Shuzhen Yang,Yijun Cao
In order to remove aluminum ions in bauxite processing wastewater, two natural clay minerals (bentonite and kaolin) were used as adsorbents. The adsorption behaviors including kinetics and isotherms were studied at much broader pH range, higher temperature, and higher Al(III) concentration by batch experiments. The adsorption mechanisms were investigated by optical microscope, zeta potential testing, and XRD analysis. The results show that Al(III) adsorption is strongly pH dependent and increases clearly with increasing pH. The pseudo-second-order kinetic model can best describe the adsorption process, and the intra-particle diffusion was not the sole rate-controlling step. The Langmuir–Freundlich model can fit best the adsorption equilibrium data, and the maximum capacities of Al(III) adsorbed on bentonite and kaolin reach to 8.52 mg g–1 and 0.58 mg g–1, respectively, at 35°C. Thermodynamic studies display that the adsorption of Al(III) onto clay minerals is non-spontaneous. The adsorption of Al(III) onto bentonite is endothermic and causes an increase in the entropy, while kaolin is exothermic and causes a decrease in the entropy. The interaction mechanisms of Al(III) with bentonite and kaolin involve electrostatic attraction, cation exchange, surface complex, and precipitation. Bentonite as adsorbent has more potential to remove Al(III) than kaolin.
研究领域:
环境科学
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吸附技术
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废水处理
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黏土矿物学
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化学工程
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Journal of Manufacturing Processes
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2020
·
IF 4.086
Xiaoping Cai,Keer Li,Changcheng Sang,Xuanru Ren,Leihua Xu,Peizhong Feng
The dissimilar metals joining of Ti/Cu was conducted using a rapid thermal explosion (TE) reaction. The Ni-Al powder mixture was used as TE reaction system, and the effect of temperature (600, 700, 800 and 900 °C) on interfacial diffusions, microstructure and mechanical properties of Ti/Cu joint were investigated. The maximum combustion temperature of Ni-Al interlayer during heating process was 720 °C and a significant exothermic phenomenon was observed for 5 s. The infiltration of melted Al into the Ti/Cu substrate and formed a continuous transition region at the interface of the joints were the dominant joining mechanisms. Microhardness of the interlayer after heated at 900 °C for 30 min possessed prominent improvement from 32.6 to 101.7 HV due to the completely phase transformation of Ni-Al interlayer, which composed of main phase NiAl and minor phase Ni 3 Al. The bond strength of the joint was checked to assess the joint quality. For the joint processed by 900 °C for 30 min, the maximum shear strength of Ti/NiAl and Cu/NiAl were 33.4 MPa and 39 MPa, respectively.
研究领域:
材料科学
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连接技术
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金属间化合物
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微观结构分析
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力学性能
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JOURNAL OF ALLOYS AND COMPOUNDS
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2014
·
IF 2.726
Chuandong Wu,Pan Fang,Guoqiang Luo,Fei Chen,Qiang Shen,Lianmeng Zhang,Enrique J. Lavernia
We report on a study on the influence of Plasma activated sintering (PAS) parameters on the microstructure and mechanical properties of aluminum matrix composites (AMCs). In this paper a commercial Al alloy (7075) reinforced with 7.5 wt.% B 4 C were synthesized using PAS. Specifically, we studied the influence of temperature, in the range of 450 °C to 540 °C, and holding time on the densification behavior of Al-7075/B 4 C composites. Moreover, the influence of residual porosity on mechanical properties of Al-7075/B 4 C composites was established via measurements of Vickers hardness, bending and compressive strength. High mechanical properties including Vickers hardness 181.6 HV, bending strength 1100.3 MPa, high compression yield strength 878.0 MPa and fracture strength 469.3 MPa of the consolidated Al-7075/B 4 C composite sintered at 530 °C for 3 min were achieved and attributed to a fully dense microstructure and a strong interface between matrix and reinforcement.
研究领域:
材料科学
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金属基复合材料
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粉末冶金
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固态加工
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力学性能表征
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Carbon Resources Conversion
·
2026
·
IF 10.9
Zhixing Li,Fei Wang,Yanchao Liu,Jinghong Ma,Kai Bian,Xinwei Zhang,Yanze Du,Ruifeng Li
The efficient conversion of C 9 heavy aromatics into high-value benzene, toluene, and xylenes (BTX) products is essential for optimizing petroleum refining. This process often depends on both diffusion and the unresolved relationship among structure, acidity, and reactivity of zeolite catalysts. This study focuses on the intracrystalline micro-/ meso -pores in ZSM-5 and decouples the interdependent effects of crystalline morphology and Al distribution of Brønsted acid sites (BAS) in ZSM-5 on C 9 aromatic conversion pathways. The hierarchical ZSM-5 catalysts have the identical SiO 2 /Al 2 O 3 ratios (SAR) and the different distribution of framework Al-species. This dominates the acid distribution of the zeolites and catalytic performances of the catalysts in C 9 aromatic reaction. In toluene/trimethylbenzene (TMB) transalkylation, the hierarchical porosity coupled with reduced crystallite size of the ZSM-5 enhances 1,2,4-TMB conversion by 24.4% and xylene selectivity by 17.9% versus conventional microporous ZSM-5. The product distribution is positively correlated to the concentration of Al atoms localized at channel intersections of the ZSM-5. Diffusion-decoupled experiments demonstrated acid site spatial configuration in the ZSM-5 governs the reaction pathway selection, with aluminum enrichment at channel intersections favoring transalkylation over disproportionation. The hierarchical ZSM-5 in submicron with intracrystalline mesopores and enriched intersection-channel aluminum favors transalkylation of C 9 aromatics to BTX. The hierarchical ZSM-5, with submicron crystallites, intracrystalline mesopores, and enriched intersection-channel aluminum, enhances transalkylation of C 9 aromatics to BTX.
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WATER RESEARCH
·
2026
·
IF 12.8
Beibei Liu,Na Pan,Chunyi Sun,Weiying Xu,Wen Song,Liangguo Yan,Tao Yan,Yu Du,Yanxia Zhao,Baoyu Gao
Hydrolyzed species critically govern the coagulation behavior of Ti-based coagulants in chemically enhanced primary sedimentation (CEPS), thereby influencing the subsequent anaerobic fermentation of CEPS sludge. However, whether and how preparation-induced Al-Ti speciation modulates solid-liquid interfacial interactions and substrate accessibility during acidogenic fermentation remains unclear, limiting the simultaneous optimization of pollutant removal and resource recovery. Here, polyaluminum-titanium chloride (PATC) composite coagulants with distinct hydrolyzed species distributions were synthesized by slow alkaline titration (S-PATC) and electrodialysis (E-PATC). Compared with S-PATC, E-PATC achieved 99.52%, 68.60%, and 71.38% higher removal efficiencies for PO 4 3− -P, UV 254 , and COD, respectively. The superior CEPS performance was attributed to the synergistic effects of highly charged small species and highly polymerized macromolecular species. Crucially, the hydrolyzed Al-Ti species introduced during CEPS acted as a front-end regulator of sludge fermentability by reconstructing solid-liquid interfacial interactions and modulating substrate accessibility. Compared with S-PATC-loaded sludge, E-PATC-loaded sludge exhibited weaker hydrophilic repulsion and higher volatile fatty acids (VFAs) production, which was associated with enhanced interfacial mass transfer. Under alkaline conditions, enhanced hydrophilic repulsion coexisted with electrostatic repulsion in the E-PATC system, with the latter predominating and promoting greater sludge disintegration. Consequently, the maximum concentration of soluble organic matter increased from 764 mg/L to 2222 mg/L on Day 4, providing abundant substrates for acidogenic microorganisms. As a result, the VFAs yield reached 1250.83 mg-COD/L, which was 6.67% higher than that obtained with S-PATC-loaded sludge. This work provides evidence that hydrolyzed Al-Ti species play a pivotal role in coagulation behavior and subsequent sludge fermentation.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Zhouxiao Zhai,Jingce Bi,Linshan Wang,Ningning Liu,Yi Wang,Xia Zhang,Zhuopeng Wang,Yide Han
Mesoporous molecular sieve-supported metals have been widely investigated as catalysts for the removal of tetracycline (TC) from water via a “preconcentration-activation-degradation” catalytic system. However, the design and construction of bimetallic catalysts supported on MCM-41 for TC degradation remains a challeng. In this study, highly dispersed Al-Fe 3 N species within MCM-41(Al-Fe 3 N/Al-MCM-41) was successfully prepared, where Al originates from Al-MCM-41 subjected to high-temperature dealumination. In the presence of Al-Fe 3 N/Al-MCM-41 and PDS, 98.5% of TC was efficiently degraded within 60 min. The corresponding reaction rate constant (0.07262 min −1 ) was 2.92 times that of Fe 3 N/MCM-41 (0.02486 min −1 ). The excellent degradation performance is attributed to the enhanced electron cloud density of Fe induced by Al doping, thereby enhancing the activation efficiency of peroxydisulfate (PDS). At the same time, micro–mesoporous structure in Al-Fe 3 N/Al-MCM-41 is beneficial to preconcentration of target contaminants for the enhancement of degradation efficiency. In addition, the disinfection performance of Al-Fe 3 N/Al-MCM-41 system against antibiotic-resistant bacteria and its device-level application were explored. This work provides a novel strategy to fabricate MCM-41 with doping Fe 3 N species for the water treatment. This strategy provides a new perspective for the rational utilization of Al atoms via high-temperature dealumination method.
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高影响因子
Journal of Energetic Materials
·
2026
·
IF 1.8
Mingzhu Guo,Zhongyuan Zhang,Zhijiang Jin,Chunlong Huangfu,Xinyu Yang,Hongyan Qu,Zhiyi Li,Feng Luo,Qian Gao
Aluminum powder, a common metallic fuel for propellants and explosives, is limited by high ignition temperatures, incomplete combustion and particle agglomeration. To mitigate these drawbacks, we synthesize core–shell Al–In–Sn ternary alloy fuel by facile melt casting. Eutectic phase separation drives spontaneous formation of an InSn₄ protective shell on Al particle surfaces. The InSn₄ shell functions as a passivation barrier at low temperatures to inhibit premature oxidation and guarantee storage stability. Upon heating above 250 °C, thermal expansion mismatch ruptures the molten shell, exposing active Al and triggering strong exothermic oxidation. The optimized 80Al–In–Sn sample exhibits an oxidation heat release of 1220 J/g (11.5-fold higher than pristine Al), a mass gain efficiency of 76.3%, and reduced activation energy (242.9 kJ/mol by Kissinger method versus 403 kJ/mol for pure Al), verifying greatly enhanced reactivity. Combined DSC and XRD results reveal the temperature-controlled oxidation mechanism. This work offers guidelines for designing storable, highly reactive alloy fuels and facilitates their engineering applications within energetic materials.
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AICHE JOURNAL
·
2026
·
IF 4.4
Quanqi Zhang,Zhonghua Jiang,Bo Yang,Binbin He,Ye Yang,Yucai Qin,Jian Zheng,Yi Mei,Yun Zu
Alloying Ni with another metal on γ-Al 2 O 3 support holds considerable promise to enhance carbon-resistance in dry reforming of methane (DRM), yet its effectiveness is constrained by poorly controlled alloy structure and surface Al-OH groups. Herein, bimetallic NiCo/γ-Al 2 O 3 catalysts were designated using electropositive NiCo complexes via a strong electrostatic adsorption strategy. The NiCo alloy and oxygen vacancy were primarily derived from the evolution of surface Al- μ 2 -OH and Al- μ 3 -OH groups anchored NiCo layered structures. The optimized Ni 3.0 Co 3.0 Al catalyst achieved near-thermodynamic-equilibrium CH 4 and CO 2 conversions, along with ultra-low coke deposition rate (0.03 mg coke ·g cat −1 ·h −1 ) after 200 h on-stream at 600°C. Microkinetic and in situ FTIR studies elucidated the reaction mechanism, wherein CH x * species from CH 4 decomposition on atomically uniform NiCo alloys were rapidly eliminated by surface Al–OH and reactive O* generated from CO 2 dissociation on limited oxygen vacancies, forming labile HCOO* and CH x O* intermediates, while effectively suppressing the Boudouard reaction, thereby ensuring exceptional catalyst longevity.
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WATER RESEARCH
·
2025
·
IF 12.4
Lingyu He,Xin Zhang,Yang Lei
This study proposes a hybrid electrochemical oxidation-coagulation (EOC) system that integrates a Ti₄O₇ anode with a cathode fabricated from waste aluminum cans, enabling the simultaneous degradation of phosphonates and removal of hardness ions from cooling water. Compared to standalone electrooxidation (EO) and conventional chemical coagulation (CC), the EOC system achieved 41.9% Ca²⁺ removal, 91% total soluble phosphorus (TSP) elimination, and 67.2% conversion of phosphonate to phosphate within 2 hours. Mechanistic studies revealed that the hybrid EOC system performs a synergistic effect, including anodic oxidation of antiscalant (nitrilotris methylene phosphonic acid, NTMP), and the cathodic dissolution of aluminum, generating coagulants that facilitate the concurrent removal of hardness ions and residual phosphorus. The presence of chloride ions enhanced NTMP degradation via the generation of reactive chlorine species (RCS) without impacting Ca²⁺ removal efficiency, whereas the presence of magnesium ions promoted Ca²⁺ removal via Mg(OH)₂ formation, which provides nucleation sites for co-precipitation. On top of mechanical insights, practical validation with real cooling water confirmed the practical effectiveness and robustness of the EOC system. Moreover, energy consumption analysis revealed that the EOC system significantly reduced energy demand for calcium and TSP removal by 91% and 76%, respectively, compared to the EO system. Overall, this work underscores an efficient and cost-effective electrochemical approach for industrial cooling water treatment, establishing foundational insights for scalable implementation.
研究领域:
环境工程
·
电化学
·
水处理技术
·
可持续材料回收
·
工业废水处理
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高影响因子
危险品化学品经营许可证（带存储）