Nanomaterials
·
2018
·Vol. 8
·期 12
·1015
·
IF 3.504
Liangfeng Zhang,Simin Liu,Yuhua Wang,Haijun Zhang,Feng Liang
A series of gold nanoparticles (AuNPs) was prepared in situ with different cucurbit[n]urils (CB[n]s) in an alkaline aqueous solution. The nanoparticle sizes can be well controlled by CB[n]s (n=5,6,7,8) with different ring sizes. The packing densities of CB[5–8] and free surface area on AuNPs were determined. A direct relationship was found between the ring size and packing density of CB[n]s with respect to the AuNP-catalyzed reduction of 4-nitrophenol in the presence of NaBH4. The larger particle size and higher surface coverage of bigger CB[n]-capped AuNPs significantly decreased the catalytic activity. Furthermore, this work could lead to new applications that utilize AuNPs under an overlayer of CB[n]s for catalysis, sensing, and drug delivery.Keywords:gold nanoparticles;cucurbit[n]urils;controllable synthesis;catalysis
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GREEN CHEMISTRY
·
2020
·Vol. 22
·期 18
·5984-5988
·
IF 9.48
Yunchao Feng,Zheng Li,Sishi Long,Yong Sun,Xing Tang,Xianhai Zeng,Lu Lin
We report here that L-rhamnose, a less popular renewable and commercially available carbohydrate, can be used as a potential raw material to generate 5-methylfurfural (MF). In particular, nearly 100% yield of MF was achieved over 7 consecutive cycles in NaCl solution containing AlCl3 within 30 min, thus providing an alternative and industrializable way for the production of the potential bio-platform compound MF.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2013
·Vol. 40
·期 4
·1575-1581
·
IF 0.88
Liu Feng,Wang Meiyan,Teng Xinhuan,Zhang Peizhi,Jiang Lin
A series of 2-(5-methyl-3-(4-chloro/trifluoromethylphenyl)isoxazol-4-yl)-5-arylamino-1,3,4-oxadiazoles were synthesized from 4-chloro/trifluoromethyl benzaldehyde, ethyl acetoacetate, hydroxylamine hydrochloride, hydrazine hydrate, and aryl isocyanate by multi-step reactions. The structures of the target compounds were elucidated by IR, 1 H NMR, MS, and elemental analysis. All these compounds were tested for in vitro antifungal activities against Botrytis cinerea and Rhizoctonia cerealis by the mycelium growth rate method, and the results indicated that some compounds displayed high antifungal activity against Botrytis cinerea.
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Sustainable Energy & Fuels
·
2018
·Vol. 3
·期 2
·390-395
·
IF 0
Siquan Xu,Chunyu Yin,Donghui Pan,Feng Hu,Yuanfeng Wu,Yanan Miao,Lijing Gao,Guomin Xiao
In this study, a series of Fe3+ modified Amberlyst-15 resins (Fe/AR) were prepared and used as environmentally friendly bifunctional catalysts for the conversion of glucose to 5-hydroxymethylfurfural (HMF). The physicochemical properties of the Fe/AR catalysts were characterized by XRD, SEM-EDX, XPS, TG-DTA and FTIR spectroscopy techniques. It was found that the 10%-Fe/AR catalyst has the ability to synergistically catalyze the isomerization of glucose and the dehydration of fructose in a “one-pot” reaction, and allows an impressive 68% HMF yield to be achieved in the H2O/THF biphasic system. Moreover, the 10%-Fe/AR catalyst still retained the desired catalytic activity after four consecutive cycles.
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Metals
·
2022
·Vol. 12
·期 7
·1078
·
IF 2.695
Minli Wang,Xu Chen,Wenwen Xu,Zhongfeng Wang,Peilei He,Zhiyi Lu
The preparation of a high performance and durability with low-platinum (Pt) loading oxygen reduction catalysts remains a challenge for the practical application of fuel cells. Alloying Pt with a transition metal can greatly improve the activity and durability for oxygen reduction reaction (ORR). In this work, we present a one-pot wet-chemical strategy to controllably synthesize carbon supported sub-5 nm PtNi nanocrystals with a ~3% Pt loading. The as-prepared PtNi/C-200 catalyst with a Pt/Ni atomic ratio of 2:3 shows a high oxygen reduction activity of 0.66 A mgpt−1and outstanding durability over 10,000 potential cycles in 0.1 M KOH in a half-cell condition. The PtNi/C-200 catalyst exhibits the highest ORR activity, with an onset potential (Eonset) of 0.98 V and a half-wave potential (E1/2) of 0.84 V. The mass activity and specific activity are 3.89 times and 9.16 times those of 5% commercial Pt/C. More importantly, this strategy can be applied to the gram-scale synthesis of high-efficiency electrocatalysts. As a result, this effective synthesis strategy has a significant meaning in practical applications of full cells.
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ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Ting Huang,Zaichun Liu,Yunlong Li,Yanqiu Li,Long Chao,Chao Chen,Yueming Tan,Qingji Xie,Shouzhuo Yao,Yuping Wu
Poly(5-hydroxytryptamine) (poly(5-HT)) is exploited as a new and efficient enzyme-immobilization matrix for amperometric and biofuel cell (BFC)-based biosensing. A GOx-poly(5-HT)-Pd nanoparticles (PdNPs) bionanocomposite is prepared by Na 2 PdCl 4 -initiated oxidized polymerization of 5-hydroxytryptamine (5-HT) in a neutral aqueous solution containing glucose oxidase (GOx), and this bionanocomposite and then chitosan (CS) are cast-coated on a Pd-plated Au electrode to yield a CS/GOx-poly(5-HT)-PdNPs/Pd plate /Au enzyme electrode. Scanning/transmission electron microscopy, UV–vis spectrophotometry and electrochemical quartz crystal microbalance are employed for material characterization and/or process monitoring. Under optimized conditions, the amperometric response of the enzyme electrode is linear with glucose concentration from 2.0 μM to 6.66 mM with a sensitivity of 110 μA mM −1 cm −2 , a limit of detection of 0.2 μM, and excellent operation/storage stability in the first-generation biosensing mode. The sensitivity is larger than those of some conventional electrodes under identical conditions. The enzyme electrode also works well in the second-generation biosensing mode. By using the enzyme electrode as the anode for glucose oxidation and a Pd plate /Au electrode as the cathode for KMnO 4 reduction, a monopolar BFC is constructed as a self-powered biosensor , the current response of which is linear with glucose concentration from 50 μM to 34.5 mM. Experiments also show that poly(5-HT) is a physical and chemical dual-immobilization matrix of enzyme, since the abundant amino groups in poly(5-HT) can be used for chemical bonding of GOx.
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AICHE JOURNAL
·
2025
·
IF 4
Xingchun Shi,Qian Zhang,Jinting Wu,Haijiao Lu,Hao Qin,Xiao-Dong Zhu,Jian Gao,Yong-Chao Zhang
Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMFOR) offers an energy-efficient route to high value-added chemicals. There is an urgent demand for high-performance non-precious metal catalysts. Herein, the oxygen-deficient FeO/NiO/Ni was synthesized, which has high performance for HMFOR with a conversion rate of 100%, a selectivity of 98.6% for 2,5-furandicarboxylic acid (FDCA), and a Faradaic efficiency of 94.1% at 1.5 V (vs. RHE), superior to most reported non-precious metal catalysts. The efficient catalytic activity of FeO/NiO/Ni is attributed to the high specific surface area and enhanced adsorption and activation of HMF by oxygen vacancies, thereby reducing the rate-limiting step energy barrier of 5-hydroxymethyl-2-furancarboxylic acid to 5-formyl-furancarboxylic acid (*HMFCA→*FFCA). Ni 3+ acts as the active site for direct HMF oxidation catalysis, while Fe doping induces oxygen vacancies that facilitate the formation and stabilization of Ni 3+ species, enhancing their formation and catalytic functionality.
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高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Xiangxin Wang,Qingxue Chen,Shubo Luo,Dongying Cui,Sinan Mu,Jufang Li,Qinggang Xie,Bailiang Li,Hong You
The Maillard reaction enhances flavor in thermally processed infant formula (IF) yet generates furfural derivatives such as 2-furfural and 5-hydroxymethylfurfural (5-HMF), raising safety concerns. This study assessed the toxicity of these compounds using both wild-type and transgenic zebrafish models, while establishing quantitative concentration-specific toxicity relationships. Stored IF produced elevated levels of 2-furfural and 5-HMF compared to normal IF, leading to immune, nervous, and liver toxicity in exposed zebrafish. Both compounds induced immunotoxicity at maximum non-lethal concentrations and hepatotoxicity across tested doses. Notably, 5-HMF showed minimal neurotoxicity and gastrointestinal (GI) effects, while 2-furfural induced neurotoxicity at its lowest concentration and GI toxicity at 10 % lethal concentration (LC 10 ). Moreover, high levels of these compounds in powdered IF can elicit immune, hepatic, and neurotoxicity, but not GI toxicity, with differences from pure compounds likely attributable to the influence of the complex dairy matrix. To our knowledge, this is the first study using the zebrafish model to systematically evaluate the immunotoxicity, neurotoxicity, hepatotoxicity and GI effects of 2-furfural and 5-HMF, and to establish quantitative, concentration-dependent, organ-specific toxicity relationships. These findings reveal the safety risks of these Maillard-derived compounds and highlight the need to optimize thermal processing to reduce their formation and improve infant-formula safety.
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Jiahui Chen,Xian Pan,Xinchi Zhang,Xin Zhou,Shiliang Wu,Youn-Sang Bae,Ismagil Shakirovich Khusnutdinov,Feng Gong,Tao Li,Huiyan Zhang,Rui Xiao
Furfural and 5-hydroxymethylfurfural are prominent biomass-derived aldehydes, offering substantial potential for sustainable fuel production. The electrochemical dimerization of these bio-derived aldehydes is investigated in this study as a novel and mild approach to carbon-chain elongation (>C6), leading to the formation of viable precursors for aviation kerosene. Compared with conventional electrochemical hydrogenation, this approach directly promotes C–C coupling without additional reagents or harsh conditions. Systematic investigations of electrode materials, applied potentials, and electrolysis duration enabled precise control over product selectivity. Notably, a Pb/CF electrode demonstrated superior catalytic performance, achieving 77.7 % selectivity for hydrofuroin from furfural and 89.8 % for 5,5′-bis(hydroxymethyl) hydrofuroin from HMF. Mechanistic analyses revealed that moderate hydrogen adsorption capacity on electrode surfaces enhances aldehyde coupling and suppresses competing hydrogenation pathways. Consequently, this mild electrochemical route offers clear advantages over thermochemical upgrading, including operational simplicity, environmental compatibility, and integration with renewable energy sources. These findings not only underscore the feasibility of electrochemical dimerization for biomass upgrading but also establish a robust basis for developing sustainable aviation fuels.
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Processes
·
2025
·Vol. 13
·期 5
·1440
·
IF 2.8
Tongtong Zhang,Sijia Wang,Xingyuan Li,Yupeng Du,Jiajun Hu,Shi Jiang,Yu Guo
Room-temperature complete oxidation of formaldehyde (HCHO) is an important orientation of research programs, yet challenges remain. The development of efficient catalysts with high activity and excellent stability is of great significance for such practical application. Inspired by this whole catalytic process, we, therefore, chose HZSM-5 zeolite with abundant acidic sites as catalyst support and lactic acid (LA) as modifier to regulate the properties. The use of LA simultaneously enhances the hydroxyls density and increases the dispersion of Pt nanoparticles, which are better than the reference catalyst prepared via direct wetness impregnation method. Most satisfying of all, the lactic acid-modified HZSM-5-supported Pt catalyst demonstrates a remarkable reaction performance for room-temperature HCHO oxidation at a high concentration HCHO of 80 ppm and a large space velocity of 360,000 mL/g/h (especially with a low Pt loading of 0.5%). In addition, a 120 h test further confirms the favorable stability of the designed catalyst. This pre-modified strategy using organic acid might provide potential approach in the construction of efficient zeolite-supported catalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tianwei Wu,Zhenyu Du,Hao Wang
Reducing energy consumption in the desorption process of chemical absorption-based carbon capture is crucial for achieving efficient industrial-scale post-combustion carbon capture. Despite advancements in solvent improvement, catalyst application, and process optimization, there remains a significant gap between the energy consumption level and its theoretical limit. This study proposed an innovative surface treatment-seeding-hydrothermal synthesis method for loading ZSM-5 zeolite acidic catalysts onto the surface of industrial packing to enhance both the reaction kinetics and mass transfer during desorption, thereby reducing desorption energy consumption. The effectiveness of the loaded catalyst was verified in the temperature range of 86–106 °C, showing 7.84 %-37.25 % improvement in desorption amounts compared to commercial catalysts of equal volume. The optimal synthesis parameters for the loading process were investigated using various characterization techniques. It was observed that controlling the synthesis time and the number of layers to induce surface roughness, in conjunction with utilizing gels with a higher silica-to-alumina ratio, significantly enhanced the desorption performance of the supported catalytic packings based on the optimized parameters, supported catalytic packings prepared with industrial packings were tested in a simulated cyclic desorption tower. The results showed that, compared to the blank packing, desorption amounts increased by 24.30 %, 78.57 %, and 53.50 %, while relative energy consumption decreased by 19.66 %, 44.03 %, and 35.57 %, respectively.
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高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 7
·544
·
IF 5.743
Jingyi Li,Ning Zhang,Xin Yang,Xinting Yang,Zengli Wang,Huan Liu
This study presents a novel composite thin film based on rhodamine B encapsulated into MOF-5 (Metal Organic Frameworks) as a fluorescence sensor for the real-time detection of the freshness of chilled pork. The composite film can adsorb and respond to the volatile amines produced by the quality deterioration of pork during storage at 4 °C, with the fluorescence intensity of RhB decreasing over time. The quantitative model used for predicting the freshness indicator (total volatile base nitrogen) of pork was built using the fluorescence spectra (excited at 340 nm) of the RhB@MOF-5 composite film combined with the partial least squares (PLS) algorithm, providing Rc2and Rp2values of 0.908 and 0.821 and RMSEC(root mean square error of calibration) and RMSEP (root mean square error of prediction) values of 3.435 mg/100 g and 3.647 mg/100 g, respectively. The qualitative model established by the partial least squares discriminant analysis (PLS-DA) algorithm was able to accurately classify pork samples as fresh, acceptable or spoiled, and the accuracy was 86.67%.
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危险品化学品经营许可证（带存储）