CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 1.9
Xudong Wang,Yanyang Wu,Tianyou Wang,Bin Wu,Kui Chen,Lijun Ji
M-cresol and p-cresol, typically produced as mixtures in industrial processes, are crucial chemical intermediates. However, their separation is challenging due to their similar structures and properties. ZSM-5 zeolite has shown potential as an adsorbent for separation, while the performance is yet to be improved. In this study, ZSM-5-F(x) was synthesized via hydrothermal method, incorporating F − ions during the synthesis process. The adsorption behaviour of m-cresol and p-cresol on ZSM-5-F(x) was investigated through static experiments, with ZSM-5-F(8) demonstrating the highest selectivity (9.01). Both ZSM-5-F(0) and ZSM-5-F(8) were characterized using XRD, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. In addition, the introduction of F − ions increased the material's electronegativity, as demonstrated by the change in zeta potential from 53.22 to −45.93 mV. Single-component adsorption of m-cresol or p-cresol on ZSM-5-F(0) and ZSM-5-F(8) respectively were investigated in detail. The adsorption of m-cresol on ZSM-5-F(8) showed a non-monotonic phenomenon with a significant decrease after 0.06 mol/L. The thermodynamic parameters including Δ G , Δ H , and Δ S were calculated accordingly. All the values |Δ G |, |Δ H |, and |Δ S | of both components on ZSM-5-F(8) were greater than those on ZSM-5-F(0), suggesting that the introduction of F − ions facilitated the adsorption. Competitive adsorption experiments on both ZSM-5-F(0) and ZSM-5-F(8) were conducted at 298.2 K. The results indicated that the selectivity α p/m on ZSM-5-F(8) increased with increasing initial concentration and laid between 13 and 14. After seven consecutive regeneration cycles, the selectivity (α p/m ) only decreased to 13. This study suggests that ZSM-5-F(8) could be a promising adsorbent for m-cresol and p-cresol in industrial applications.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Jing Cao,Peiling Liu,Fangmei Teng,Jialing Liu,Yuting Ni,Xianghui Liu,Jiali Mu,Cen Zhang
Achieving both high activity and good stability remains a challenge for the design of MoS 2 -based catalysts in the hydrodeoxygenation (HDO) reaction. Herein, a robust catalyst with single-layer CoMoS anchored on hydrophobic reduced graphene oxide (SL-CoMoS/rGO) was fabricated, which exhibited high activity, selectivity and excellent stability in the HDO of lignin-derived phenolics to arenes. Utilizing the HDO of 4-methylphenol as a probe reaction, the catalyst afforded a conversion of 98.3 % and a toluene selectivity of 99.2 % at a mild condition of 210 °C and 3.0 MPa. The superior HDO performance was ascribed to the high dispersion of MoS 2 particles, which provides a large amount of edge sites for the efficient Co decoration to form the Co-Mo-S active centers. Thus, the Mo-S bond at the edge sites was significantly weakened and the formation of sulfur vacancies was remarkably enhanced. Besides, density functional theory calculations reveal that Co-Mo-S active phase could not only favor the adsorption of 4-methylphenol but also lower the energy barrier of the rate-determining step. Moreover, no obvious deactivation was observed for SL-CoMoS/rGO after six HDO cycles. The excellent durability was benefitted from the hydrophobic surface and lowered reaction temperature, which could effectively alleviate the sulfur loss and particle sintering.
研究领域:
催化化学
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材料科学
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化学工程
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纳米技术
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绿色化学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Xiaotian Xu,Shi-Fan Xue,Jiale Wang,Wei Zhang,Da Wu,Guoyue Shi,Min Zhang
Selective detection of phenolic compounds is imperative for environmental surveillance and public health safeguards. This study introduces a dual-electrode voltametric electronic tongue (e-tongue) leveraging transition metal oxide-nanoengineered laser-induced graphene (LIG) to resolve phenol and its cresol isomers (o-, m-, p-) despite overlapping electrochemical signals. Contrary to conventional single-electrode systems hindered by matrix-induced peak overlaps, our e-tongue employs a synergistic sensing arraying: MnO 2 /LIG and Bi 2 O 3 /LIG. These composites are fabricated via a one-step in situ laser doping process, ensuring uniform nanoparticle integration while mitigating distributional inhomogeneity and interfacial weaknesses associated with post-synthetic modifications. Both MnO 2 /LIG and Bi 2 O 3 /LIG exhibit augmented electroactive surface areas, conductivity, electron transport kinetics, hydrophilicity, and stability relative to pristine LIG. The dual-electrode system achieved robust differentiation of phenolics in buffered solutions, environmental water samples, and tobacco smoke matrices. This work pioneers a scalable nanoengineering strategy for multi-target analysis of structurally proximal pollutants, advancing point-of-need environmental monitoring technologies.
研究领域:
环境科学
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分析化学
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纳米材料
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电化学传感器
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污染物检测
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
·
IF 21.1
Riyang Shu,Yu Chen,Yuankai Lin,Yongyuan Deng,Yan Liu,Kaixin Li,Tao Yin,Zhongqing Ma,Jinxing Long
Catalytic hydrodeoxygenation (HDO) is an efficient and promising approach to upgrade lignin-derived phenolic compounds for the production of high-quality liquid fuels. In this work, a readily obtained Ni-Ni 3 P/ZrP catalyst featuring synergistic catalytic sites of Ni-Ni 3 P and Lewis-Brønsted acid was provided for promoting the HDO performance of lignin-derived phenolic compounds. By regulating the ratio of Zr to P (Zr/P), the catalytic activity of Ni/ZrP was significantly modified. With the optimized catalyst of Ni-Ni 3 P/ZrP-0.75, guaiacol is completely converted into cyclohexane at a low temperature of 240 °C. Further investigation shows that the synergistic effect of Ni and Ni 3 P, deriving from that Ni acts as metal site to activate hydrogen and Ni 3 P serves as Lewis acid site to adsorb guaiacol substrate, promotes the hydrogenation procedure significantly. Moreover, ZrP support as Lewis acid also demonstrates a synergistic interaction with Brønsted acid site that derives from the P-OH group. The coordination of Lewis-Brønsted acid site significantly improves the deoxygenation procedure. The strong interaction between Ni species and ZrP support accelerates the sequential occurrence of hydrogenation and deoxygenation procedures, thus improving the HDO efficiency. The Ni-Ni 3 P/ZrP-0.75 can be reused at least six runs without significant activity loss. Moreover, this Ni-Ni 3 P/ZrP-0.75 is efficient on the upgrading of realistic lignin-oil, with the hydrocarbon content increase from 13.4 % to 93.8 %. Therefore, this work provides a valuable reference for the rational design of bifunctional catalysts in the HDO reactions.
研究领域:
催化化学
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生物质能源
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环境友好化学
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表面科学
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材料化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhenghui Jing,Shuai Ping,Yutong An,Jia Wang,Ke Lei,Zhaohe Niu,Xinlong Zang,Zimin Liu
Spleen is an ideal secondary lymphoid organ for initiating and amplifying tumor-specific immunity; however, suboptimal antigen delivery and immune activation cause immune tolerance, limited tumor therapeutic efficacy and undesired side effects. Herein, we designed a spleen targeted nanovaccine that can carry tumor antigens and microRNA-155 (miR155) to spleen, achieving sufficient and persistent immune responses. To encapsulate miR155, we synthesized a glutathione (GSH)-responsive cationic polymer (PADDAC) that spontaneously self-assembled with miR155 to form nanocomplexes. Afterwards, the nanocomplexes were infused with tumor cell and erythrocyte membranes, granting them the ability to carry tumor associated antigens (TAAs) and target splenic antigen-presenting cells, respectively. We found that the nanovaccine demonstrated spleen-selective accumulation and efficient cytotoxic T lymphocyte activation with protective immune memory. This significantly inhibited the growth of the primary tumor and hindered the development of pulmonary metastasis in a tumor harboring mouse model. Moreover, we generated a personalized nanovaccine, which reduced local tumor recurrence post-surgery. This study highlighted the potential of splenic targeting nanovaccine for tumor preventative and therapeutic applications.
研究领域:
纳米技术
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免疫学
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肿瘤学
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生物医学工程
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RNA递送
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药物递送
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Jia Ming-Yang,Zhou Yue-Wen,Yang Jun-Lei,Liu Qinlei,Cai Zhen-Feng
Ullmann-type coupling reactions are one of the most important transformations in organic synthesis. Achieving catalyst-free Ullmann couplings under mild conditions is crucial to extending the scope of traditional carbon-carbon and carbon-heteroatom couplings. Herein, we show that Ullmann couplings can be effectively achieved at room temperature without the need for metal catalysts in MeOH/H 2 O microdroplets. Mechanistic investigations reveal that the Ullmann reaction in microdroplets is driven by •OH radicals and involves a single-electron transfer pathway via nitrogen-centered radicals. This work not only provides fundamental insights into the •OH radical-mediated coupling reactions in microdroplets but also offers a new strategy for catalyst-free Ullmann couplings.
研究领域:
有机合成
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化学反应机理
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绿色化学
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微滴化学
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产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2026
·
IF 8.2
Zi Ye,Xinyu Wang,Tao Wang,Chuanqi Chu,Zhijia Liu,Leilei Yu,Ming Du,Junjie Yi
p -Cresol plays a pivotal role in shaping the flavor quality of suansun . This study examined the effect of inoculating Levilactobacillus zymae KUST4216, a high p -cresol-producing strain, on the fermentation of suansun . Comparative analyses between uninoculated and inoculated fermentation revealed that both followed similar acidification patterns, but inoculated fermented suansun accumulated significantly more p -cresol (6.62 ± 4.15 mg/kg vs. 0.20 ± 0.14 mg/kg). Inoculation with L. zymae KUST4216 rapidly established microbial dominance, reshaped community succession, and promoted early sugar utilization. Genomic analysis showed enrichment in carbohydrate and amino acid metabolism and abundant CAZymes, supporting efficient precursor supply for aromatic compound biosynthesis. Transcriptomic profiling confirmed coordinated regulation that directed metabolic flux toward p -cresol synthesis. Overall, L. zymae KUST4216 drives p -cresol formation via the tyrosine pathway and stabilizes fermentation ecology, providing mechanistic insight into flavor generation and offering a strategy for enhancing the sensory quality of fermented bamboo shoots through targeted microbial inoculation.
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Siyi Kang,Yawei Yang,Jingwei Chen,Jiaqiang E
Waste printed circuit boards (WPCBs) represent a valuable resource for recovery owing to their substantial metallic content. Nonetheless, efficient metal extraction is hindered by the robust epoxy resin matrix. This study introduced a novel supercritical water (SCW)-assisted acid leaching process to achieve rapid epoxy resin decomposition and high-efficiency Cu recovery. A systematic analysis was conducted on the decomposition behavior of epoxy resin and its monomer, bisphenol A diglycidyl ether (BADGE) in supercritical water. Through product characterization, the mechanism of co-action involving hydrolysis, free radical reactions, and solvolysis during the decomposition of epoxy resin has been elucidated. Response surface methodology (RSM) was employed to optimize hydrothermal parameters for BADGE decomposition and predict optimal reaction conditions. Subsequent acid leaching of SCW-decomposed products achieved a high leaching efficiency (98.9 %) and selectivity (99.9 %) of Cu. This integrated SCW-acid leaching process offers a promising and effective solution for WPCB recycling, aligning with the dual goals of environmental sustainability and efficiency in resource recovery.
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2012
·
IF 4.531
Shuchao Wu,Bingcheng Yang,Lingling Xi,Yan Zhu
The current study describes the determination of phenols using ion chromatography–online electrochemical derivatization–fluorescence detection (IC/ED/FD). Six model phenols including 4-methylphenol (pMP), 2, 4-dimethylphenol (DMP), 4-tert-butylphenol (TBP), 4-hydroxylphenolacetic acid (pHPA), 4-acetamidophenol (pAAP), and phenol (P) were well separated on an anion-exchange column under ion exchange mode using NaOH with small amount of acetonitrile added as eluent. Online electrochemical derivatization performed via a laboratory-made electrolytic cell (EC), consisting of porous titanium electrode and cation-exchange membrane (CEM), allows the oxidation products that are strongly fluorescent to be detected by the fluorescence detector. NaOH eluent used in the present method matches well with the maximal fluorescence intensity obtained at alkaline condition for oxidized phenols, thus the addition of specific buffer solution after oxidation encountered in previous report could be eliminated. This process leads to a simplified procedure. The proposed method was sensitive to the limits of detection in the range of 0.4 μg/L and 3.8 μg/L and the limits of quantification between 1.2 μg/L and 13 μg/L due to the strong electro-oxidation capacity of porous titanium electrode, as well as the implementation of time-programmed potential over EC. The linear ranges were 2.0–1.0 × 10 4 μg/L for pAAP and DMP, and 10–1.0 × 10 4 μg/L for P, pMP, pHPA, and TBP, respectively. The relative standard deviations range from 0.9% to 4.8%. The utilization of the method was demonstrated by the analysis of real samples. The average spiked recoveries of target analytes in pool water were 81.0–118%.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF MEDICAL ENTOMOLOGY
·
2018
·Vol. 55
·期 4
·787-794
·
IF 1.968
Tian Jiaxin,Mao Jie,Yu Baoting,Fouad Hatem,Ga’al Hassan,Mao Guofeng,Mo Jianchu
Efforts to develop mosquito attractants using vertebrate host volatiles have been well made under laboratory conditions but their attractiveness to mosquitoes in the wild still needs to be evaluated. In the present study, we evaluated the attraction of female Culex pipiens pallens Coquillett (Diptera: Culicidae) to 11 individual chemical compounds found in vertebrate host odors, and to synthetic blends, consisting of different combinations of the compounds. These tests were conducted under laboratory and field conditions using a Y-tube olfactometer and odor-baited traps, respectively. When delivered at concentrations ranging from 0.1 to 10.0 μg/kg, 9 of the 11 compounds were attractive to female mosquitoes under laboratory conditions. We developed 47 synthetic blends composed of the 6 most attractive compounds (propionic acid, hexanal, myristic acid, benzaldehyde, 1-octen-3-ol, and geranyl acetone) and 18 of them were significantly attractive to mosquitoes in the olfactometer. Most of the attractive blends contained two to four attractive compounds. In the field, 5 of the 18 blends captured significantly more mosquitoes than did control traps. The findings demonstrate that female mosquitoes can be attracted by single chemical compounds as well as some of their synthetic blends. The effectiveness of synthetic blends depended on specific combinations of several compounds, rather than simply increasing the number of attractive compounds in the blends. Synthetic blends may have potential for use in odor-baited traps for mosquito surveillance.
研究领域:
昆虫学
·
公共卫生
·
病原生物学
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2020
·
IF 5.578
Xiaohua Zhang,Weikun Jiang,Hao Ma,Shubin Wu
This study investigated the relationship between the formation of oligomers and monophenols and lignin structure during pyrolysis regarding two technical lignins from alkali lignin (AL) and corn cob hydrolysis residue lignin (CHRL). The results showed that the molecular weight distribution and inter-unit linkages varied substantially between AL and CHRL, resulting in profound differences in the content of monophenols and oligomers and their distributions in pyrolysis oil (PO). Thereinto, CHRL-PO containing higher monomers content (20.48%) and lower oligomers content (14.31%) relative to AL-PO (5.02%, 22.4%). This was attributed to the higher proportion of guaiacyl (G) units existed in AL, which tended to form oligomers and char. Additionally, the formation pathways of main monophenols from two POs were also different. In light of these findings, the thermal cracking behavior of lignin was closely bound up with its structural features. On one hand, the formation pathways of lignin-derived dimers and tetramers in PO originated from the breaking of a large amount of β-O-4, α-O-4 and C β -C γ bonds during pyrolysis process. Meanwhile, the interconversion relationship between oligomers and monophenols was also existed. Polycyclic aromatic hydrocarbon (PAH) derivatives, on the other hand, were formed by the continuous growth of smaller free radicals because of the evolutionary components (such as phenols, syringols) could form oxygen-related free radicals during the secondary reaction process. Overall, this work provided the research basis and theoretical guidance for balancing the production of oligomers and monophenols through the selection of specific lignin feedstock.
研究领域:
生物质能
·
化学工程
·
林业科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Wenxiao Zheng,Liuyi Zhu,Sheng Liang,Jinshao Ye,Xin Yang,Zhenchao Lei,Zhang Yan,Yongdong Li,Chaohai Wei,Chunhua Feng
Inorganic constituents in real wastewater, such as halides and carbonates/bicarbonates, may have negative effects on the performance of electrochemical systems because of their capability of quenching HO•. However, we discovered that the presence of Cl– and HCO3– in an electrochemical system is conducive to the formation of ClO•, which plays an important role in promoting the simultaneous elimination of biorefractory organics and nitrogen in secondary coking wastewater effluent. The 6-h operation of the coupled electrochemical system (an undivided electrolytic cell with a PbO2/Ti anode and a Cu/Zn cathode) at a current density of 37.5 mA cm–2 allowed the removal of 87.8% of chemical oxygen demand (COD) and 86.5% of total nitrogen. The electron paramagnetic resonance results suggested the formation of ClO• in the system, and the probe experiments confirmed the predominance of ClO•, whose steady-state concentrations (8.08 × 10–13 M) were 16.4, 26.5, and 1609.5 times those of Cl2•– (4.92 × 10–14 M), HO• (3.05 × 10–14 M), and Cl• (5.02 × 10–16 M), respectively. The rate constant of COD removal and the Faradaic efficiency of anodic oxidation obtained with Cl– and HCO3– was linearly proportional to the natural logarithm of the ClO• concentration, and the specific energy consumption was inversely correlated to it, demonstrating the crucial role of ClO• in pollutant removal.
研究领域:
环境工程
·
水处理
·
电化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）