FOOD CHEMISTRY
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2026
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IF 10.4
Xiaolu Zhou,Ling Xia,Yufei Hu,Gongke Li
Preparation of γ-Al2O3/Eu-BTC for catalytic sensing toward terpenes. • A cyclic cataluminescence array sensor based on k-values corresponding to terpenes. • Investigation of the k -value pattern on the variation of terpene composition. • Origin identification of 86 hop samples based on characteristic terpenes. Hops are crucial to beer flavor, but their geographically dispersed origins are prone to confusion, while the significant variation in terpene ratios among hops from different regions provides key support for its origin identification. In this study，γ-Al 2 O 3 /Eu-BTC composite was synthesized for cyclic cataluminescence array sensor to terpenes. The results showed that the corresponding reaction decay coefficients ( k -values) for myrcene, farnesene, and humulene were 24.3, 32.0, and 73.8, respectively, enabling terpene-specific fingerprinting. Binary and ternary terpene mixtures exhibited predictable k -value variations, with relative standard deviations below 9.6%. A rapid detection method for hops identification was developed and successfully applied to 86 samples from six different origins. The method demonstrated both feasibility and accuracy, highlighting its potential as a rapid, simple, and efficient technique for origin identification of hops and other aromatic plants. Download: Download high-res image (160KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Yu-Zheng Wang,Shu-Qi Li,Zi-Kai Zhou,Chao-Jun Chen,Wei Yang,Si-Nuo Zhang,De-Zheng Yang
The development of mild and green ammonia synthesis is a significant and challenging research. In this study, a nanosecond pulse-driven coaxial double dielectric barrier discharge reactor was combined with M/γ-Al 2 O 3 (M = Co, Ni, Co–Ni) catalysts for efficient ammonia synthesis. Key parameters including pulse voltage, gas flow rate, and N 2 /H 2 molar ratio were systematically investigated. The Co–Ni/γ-Al 2 O 3 catalyst achieved the best energy efficiency of 1.11 g/kWh and a synthesis rate of 226.33 μmol g −1 h −1 under optimal conditions, which is 3.44 times higher than that of the plasma only system. Characterization revealed superior metal dispersion, smaller metal particle size, and larger specific surface area for Co–Ni/γ-Al 2 O 3 . Electrical diagnostics and optical emission spectroscopy (OES) showed that catalyst packing enhances discharge intensity and promotes key active species (N 2 ∗, N 2 + , and H α ). Synergistic effects between Co and Ni sites promote ammonia formation. This work provides new insights for designing high-efficiency plasma-catalytic ammonia synthesis systems.
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
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2013
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IF 0.601
Zhikui Yin,Bin Zheng,Fang Ai
Sulfonic acid functionalized nano γ-Al2O3 is easily prepared by the reaction of nano γ-Al2O3 with 1,3-propane sulfone. This reagent can be used as an eficient catalyst for the synthesis of thioamides. This new method consistently has the advantages of excellent yields and short reaction times. Further, the catalyst can be recovered for several times.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jun Luo,Ao Wang,Lichao Jia,Dong Yan,Mei Hu,Jian Li
For the improvement of commercial catalyst 13 wt % Cr-γ-Al2O3 for the dehydrogenation of light alkanes to olefins, 13 wt % Cr-x wt % Ce-γ-Al2O3 catalysts with x equaling 0, 2.5, 5, 7.5, and 10, named as 0Ce, 2.5Ce, 5Ce, 7.5Ce, and 10Ce, are prepared by the incipient wetness impregnation method, characterized by X-ray diffraction, transmission electron microscopy, Raman, UV–vis, X-ray photoelectron spectroscopies, and temperature-programmed reduction and evaluated for ethane dehydrogenation to ethylene. Their performance increases with Ce addition to 5 wt % and then decreases and attenuates with time. 5Ce demonstrates the highest dehydrogenation activity and better regeneration ability than 0Ce. It is found that the as-prepared 5Ce contains more active amorphous Cr6+ species and less crystalline Cr3+ species (α-Cr2O3) than 0Ce, other than the Ce species of CeO2. The reasons for the better dehydrogenation and regeneration performance of 5Ce are that the CeO2 particles in 5Ce physically separate the Cr species, promoting the formation of Cr6+ species, preventing their aggregation and migration to form less active α-Cr2O3 and inactive α-(Cr, Al)2O3, and preserving more active Cr6+ species in the as-prepared and regenerated catalysts.
研究领域:
催化化学
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化学工程
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材料科学
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石油化工
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OZONE-SCIENCE & ENGINEERING
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2025
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IF 1.4
Zhibo Liu,Jing Zhang,Jingcheng Wei,Bingyan Zhu,Tingfeng Xue,Xiaofu Li,Liwei Pan
To address the challenges posed by highly toxic and recalcitrant compounds in phenol-containing wastewater, a novel CoAl2O4/γ-Al2O3 catalyst was synthesized via an impregnation-calcination method and applied for catalytic ozonation of phenolic wastewater. The catalyst was thoroughly characterized using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma (ICP) analysis. The catalyst’s abundant Lewis acid sites act as active centers, promoting the decomposition of ozone into reactive oxygen species. This study elucidates the pathways by which the CoAl2O4/γ-Al2O3 catalyst synergistically activates O3 to generate O2·−, ·OH, and 1O2, revealing that phenol mineralization primarily proceeds through ·OH and 1O2-mediated oxidation. Compared to ozonation alone, the CoAl2O4/γ-Al2O3 catalyst demonstrates superior O3 activation capability, significantly enhancing the phenol mineralization efficiency from 13.5% to 56.5% while improving ozone utilization (mgTOCremoved/mgO3consumed) from 0.02 to 0.08. Remarkably, the catalyst maintains excellent stability over multiple reaction cycles. Toxicity evaluation confirms substantial reduction in biotoxicity of the treated wastewater. These findings collectively demonstrate that CoAl2O4/γ-Al2O3-based catalytic ozonation represents an efficient and promising technology for phenolic wastewater treatment.
研究领域:
环境科学
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催化化学
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水处理技术
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高级氧化工艺
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材料化学
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CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Min-Ping Zhu,Jia-Cheng E. Yang,Xiaoguang Duan,Dan-Dan Zhang,Shaobin Wang,Baoling Yuan,Ming-Lai Fu
Metal organic frameworks (MOFs)-based catalysts are rising stars in advanced oxidation processes (AOPs) to generate reactive oxygen species (ROS). Nevertheless, constructing an affordable and recyclable MOFs-derived catalyst with high reactivity and stability is highly desirable but still challenging. Herein, we unprecedentedly designed a novel CoAl 2 O 4 @γ-Al 2 O 3 pellet (CoAl 2 O 4 @AP) as a heterogeneous catalyst to activate peroxymonosulfate (PMS) toward ROS generation for metronidazole (MNZ) removal. A CoAl 2 O 4 shell was formed on the pellet surface by direct calcination of the surface-nucleated ZIF-67 on γ-Al 2 O 3 pellets. The strong and unique interactions between the Co species of ZIF-67 and γ-Al 2 O 3 resulted in the formation of interfacial CoAl 2 O 4 . The CoAl 2 O 4 @AP exhibited a remarkably higher efficacy for PMS activation than ZIF-67-derived Co 3 O 4 and commercial Co 3 O 4 . The effects of several reaction parameters (i.e., PMS dosage, reaction temperature, initial pH, and background inorganic ions) on MNZ removal were comprehensively investigated and the degradation pathways of MNZ were elucidated. The Co 2+ /Co 3+ and oxygen vacancies of CoAl 2 O 4 @AP were the intrinsic active centers for PMS activation to simultaneously generate a diversity of ROS, among which SO 4 − and 1 O 2 played the decisive roles in MNZ decomposition. After the reaction, CoAl 2 O 4 @AP can be easily separated from the bulk solution and regenerated via a PMS-assisted cleaning process, making the composites highly appealing for practical applications. This pioneering work on constructing microscopic CoAl 2 O 4 -based composites expands the application of MOFs-based catalysts in novel AOPs systems for the treatment of persistent emerging pollutants.
研究领域:
环境科学
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材料科学
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CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 5.1
Guanglin Cao,Xiao Chen,Huibin Liu,Weilin Shen,Changhai Liang
The catalytic reduction of nitroaromatic compounds to aromatic anilines is a widely employed route for producing high-value refined chemicals and large-scale commodities. Developing highly efficient catalysts represents a promising strategy to achieve continuous and selective hydrogenation of functionalized nitroarenes under flow conditions. In this work, γ-Al 2 O 3 @Ni/FeO x egg-shell microspherical catalysts featuring high atomic dispersion, high specific surface area, and tunable active sites are designed by strategically harnessing hydrotalcite-inspired characteristics, which integrates a Ni–FeO x interfacial synergy into an egg-shell architecture for continuous-flow selective hydrogenation. In the continuous flow selective hydrogenation of o -chloronitrobenzene, the γ-Al 2 O 3 @Ni/FeO x -3 egg-shell microspherical catalyst presents a turnover frequency (TOF) of 30.16 h −1 , substantially higher than those of γ-Al 2 O 3 @Ni and γ-Al 2 O 3 @FeO x . Compared with the uniform Ni 3 Fe 1 /Al 2 O 3 catalyst, the egg-shell catalyst also exhibits enhanced mass transfer efficiency. The egg-shell catalyst enables an increased presence of electron-rich Ni δ- sites and FeO x species rich in oxygen vacancies on the surface of γ-Al 2 O 3 microspheres. Due to the formation of Ni δ- -O v -Fe 2+ , the egg-shell catalyst exhibits remarkable H-spillover capability, significantly enhancing the selective hydrogenation of o -chloronitrobenzene to o -chloroaniline. The apparent activation energy of the γ-Al 2 O 3 @Ni/FeO x -3 catalyst is only 22.99 kJ mol −1 , much lower than those of other egg-shell catalysts, indicating the synergistic integration of metallic Ni sites and oxygen vacancies. In addition, the as-prepared γ-Al 2 O 3 @Ni/FeO x -3 egg-shell catalyst presents long-term stability over 80 h and broad substate scope. This work offers comprehensive guidance for the rational design of industrial egg-shell catalysts, as well as establishes a solid foundation for the continuous flow selective hydrogenation process, aimed at producing substituted anilines from functionalized nitroarenes.
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Catalysis Science & Technology
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2014
·Vol. 5
·期 1
·549-555
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IF 4.76
Feng Cui,Guangci Li,Xuebing Li,Mohong Lu,Mingshi Li
The carbon-covered aluminas were prepared by using different monocarboxylic acids as carbon sources to modify active alumina, and then were used as supports to prepare supported CoMo catalysts for hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT). These monocarboxylic acid molecules can be readily converted to carbon species by thermal decomposition in a nitrogen atmosphere and deposited on an alumina surface. The carbon species can then effectively weaken the interaction between active metals and alumina, which improves the migration and growth of surface Mo species. This result further affected the morphology and orientation of surface sulfur species, that is, the slab length and stacking number of the MoS2 slabs, which closely relates to HDS activity. Since the surface Mo species supported on the alumina modified with acetic acid consisted of the MoS2 slabs with the shortest lengths, leading to the presence of more easily reducible sulfur species during the reaction, the corresponding catalyst exhibited the highest HDS activity for 4,6-DMDBT. In addition, the stacking numbers for all of the catalysts were relatively low, which hindered the adsorption of 4,6-DMDBT on the brim sites of the MoS2 stacks, and thus the HDS reaction mainly occurred through the direct desulfurization route.
研究领域:
催化化学
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能源化学
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RSC Advances
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2018
·Vol. 8
·期 61
·35014-35022
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IF 2.936
Menglu Song,Xiangui Yang,Gongying Wang
γ-Al2O3 loaded with potassium nitrate (KNO3/Al2O3) catalysts were prepared, characterized and employed as a type of heterogenous solid base catalyst in the synthesis of polycarbonate (1,4-butane carbonate)-diol (PBC–OH) via the transesterification of dimethyl carbonate (DMC) and 1,4-butanediol (BD). The relationship between physicochemical properties and catalytic performance for KNO3/Al2O3 in this transesterification reaction was investigated using various techniques. The results demonstrated that the performance of KNO3/Al2O3 catalysts was highly influenced by basic site amount and strength. The medium and strong basic sites were beneficial for this reaction. The catalyst with a KNO3 loading of 35% and a calcination temperature of 700 °C exhibited the best catalytic activity due to its highest basic site amount and appropriate base strength. The highest BD conversion and PBC–OH yield of 80.2% and 68.4% were obtained under optimal reaction conditions. Also, this solid base catalyst was successfully employed in the synthesis of copolycarbonate diols from DMC and two different diols. Different scanning calorimetry results indicated that the thermal properties of the copolycarbonate diols can be adjusted by regulating the average segment lengths, Mn and copolymer composition structure.
研究领域:
化学工程
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材料科学
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
·
IF 3.898
Xinyu Yang,Zezhi Chen,Huijuan Gong
Catalytic oxidation of CH 4 has been proved to be an attractive option for landfill gas (LFG) upgrading. However, coking of catalysts in catalytic LFG deoxygen has been clearly observed in industrial applications. In this regard, it is necessary to investigate whether coke deposition originates from CH 4 or volatile organic compounds present in LFG, and the influence of coke deposition on catalytic performance. Herein, we evaluate the LFG deoxygen on Pt/γ-Al 2 O 3 catalyst in simulated LFG (CH 4 , CO 2 , O 2 , N 2 ) and its co-feed with representative volatile organic compounds, ethylbenzene , toluene, benzene and cyclohexane . The results show that the coking of the catalyst is originated from volatile organic compounds rather than CH 4 . The Pt/γ-Al 2 O 3 catalyst does not deactivate during LFG deoxygen process, even significant amount of coke deposited, up to 18.15% (mass). Characterization analyses reveal that although coke deposition overall covers the catalyst surface, resulting in mesopores blockage and a reduced number of accessible Pt sites, however, the coke formed, H-rich carbonaceous components, behaves as counterpart for O 2 elimination. Besides, the coke deposited is mainly filamentous. Thus, coke formation has little negative effect on the overall catalytic performance of Pt/γ-Al 2 O 3 catalyst ultimately. The results obtained in this work are helpful for the rational design of robust Pt based catalysts for LFG deoxygen without undue attention to their coking properties, and also favor the innovation of more attractive purification scheme configurations.
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Catalysts
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2019
·Vol. 9
·期 12
·994
·
IF 3.444
Junan Gao,Song Gao,Jun Wei,Hong Zhao,Jie Zhang
In this paper, the catalytic combustion of DMDS (dimethyl disulfide, CH3SSCH3) over bimetallic supported catalysts were investigated. It was confirmed that Cu/γ-Al2O3-CeO2showed best catalytic performance among the five single-metal catalysts. Furthermore, six different metals were separately added into Cu/γ-Al2O3-CeO2to investigate the promoting effect. The experiments revealed Pt as the most effective promoter and the best catalytic performance was achieved as the adding amount of 0.3 wt%. The characterization results indicated that high activity and resistance to sulfur poisoning of Cu-Pt/γ-Al2O3-CeO2could be attributed to the synergistic effect between Cu and Pt.Keywords:catalytic combustion;dimethyl disulfide;bimetallic;supported catalyst
研究领域:
催化
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环境科学
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化学工程
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yufan Mo,Chunli Li,Huiyu Li,Luis Alberto Estudillo-Wong,Luming Wu,Yinbin Wang,Haibin Yu,Dianqing Li,Yongjun Feng
Porous spherical γ-alumina supports play the key role in the petroleum reforming industry with strict requirement in hydrothermal stability of pore structure. Here, a series of pseudo-boehmite samples with different crystal orientations were synthesized in a separate nucleation and aging steps method by adjusting the rotating speed. The pseudo-boehmite (PB-1000) at 1000 rpm yields a high (0 2 0) plane proportion of 44.52 %, which is comparable with that of 43.91 % for the Sasol Boehmite (SB) powder. The Al 2 O 3 -1000 from the PB-1000 demonstrated the highest content of γ-Al 2 O 3 phase, the lowest surface hydroxyl number of 1.56/nm 2 , and the highest hydrothermal stability with the retention rate of 75.0 % (174 m 2 ·g −1 ) at 600 °C under water vapor for 120 h, which is comparable to that of 72.3 % (191 m 2 ·g −1 ) for the Sasol sample. It is the first time to investigate hydrothermal stability of alumina from the content of γ-Al 2 O 3 phase and the surface hydroxyl groups.
研究领域:
材料科学
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石油化工
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危险品化学品经营许可证（带存储）