JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2026
·
IF 5.3
Qingqing Zou,Dan Zhou,Shan Mou,Shuixin Ding,Yingjuan Wang,Chunyan Su,Qianchun Zhang
Vanillin is widely used in food and industrial applications, but excessive intake of vanillin can pose health risks. Therefore, the development of novel detection strategies with high sensitivity and selectivity is essential for the accurate identification of vanillin. Ethyl ( Z )-2-cyano-4-oxo-3,4-diphenylbut-2-enoate (ECOD), a novel fluorescent probe, was synthesized by an elimination reaction using ethyl cyanoacetate, benzil, and aqueous ammonia as raw materials. The probe exhibited maximum fluorescence excitation and emission wavelengths at 300 and 340 nm, respectively, with a quantum yield of 22.6%. ECOD was found to have high selectivity and sensitivity for the detection of vanillin. This was attributed to ECOD binding to vanillin, which induced conformational changes and triggered intermolecular charge transfer (ICT), ultimately resulting in fluorescence quenching. Therefore, a fluorescence-based method was established for the quantification of vanillin in biscuits, candy, and milk sauce. The linear detection range was 1.0–100 µM and the detection limit was 0.33 µM. The recoveries ranged from 93.2% to 113%, with an RSD ranging from 2.8% to 10%. These results indicated that ECOD had significant application potential in food analysis, suggesting that the fluorescence method based on ECOD could provide a novel approach for rapid vanillin determination in complex food matrices.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2025
·
IF 2.2
Min Zheng,Ali Farajtabar,Abolghasem Jouyban,William E. Acree,Hongkun Zhao
At 298.15 Kelvin, the method of isothermal dissolution was utilized in this current work at 101.0 kPa to obtain the experimental solubility data for the quaternary terephthalic acid (TA), p -toluic acid ( p -TLA) + 4-carboxybenzaldehyde (4-CBA) + N -methylpyrrolidone (NMP) system. Generation of the quaternary phase diagram was made through the Jãneck approach, which was based on the mutual solubility that was determined. Three zones of neat solid crystallization, one invariant point, along with three co-saturated curves, were included in the quaternary phase diagram. The three solids that were validated by Schreinemaker approach of wet residue were pure p -TLA, pure 4-CBA, and pure TAˑ2NMP, an adduct of TA with NMP with a mole ratio of 1:2. The area where TAˑ2NMP crystallizes is larger compared to that for p -TLA and 4-CBA. In addition, the model of NRTL was used to mathematically correlate and calculate the quaternary solid-liquid phase diagram. The experimental quaternary phase diagram was found to be in good agreement with the computed one obtained from the NRTL model as evidenced by a root-mean-square deviation of 0.14632 and a relative average deviation of 5.01 %. Separating TA from its mixtures by solvent adduct crystallization might be fundamentally supported by the quaternary phase diagram and thermodynamic models. Considering the investigation on the independent gradient model based on Hirshfeld partitions, as well as the 2D fingerprint plot and difference map of electron density, density difference and difference map of ELF analysis, the van der Waals forces are viewed as favorable weak interactions during the process of forming the adduct of TAˑ2NMP.
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Song Chen,Juan Du,Lulu Shen,Weiyi Chen
Hierarchical materials are of great interest toward the development of catalysts because of their unique structures and large specific surface area. In this study, Ag-decorated TiO 2 (TiO 2 @Ag) nanowire nanofibers (NW NFs) were synthesized via the in situ decoration of Ag nanoparticles (NPs) on hierarchical TiO 2 NW NFs and their microstructure and catalytic activity for the removal of 4-nitrophenol were evaluated. TiO 2 NW NFs were first synthesized via the hydrothermal reaction of the electrospun TiO 2 NFs in a concentrated NaOH solution and then hydrothermally treated in a AgNO 3 solution to form the TiO 2 @Ag NW NFs. SEM observations showed that the TiO 2 @Ag NW NFs were assembled from numerous TiO 2 NWs subunits and exhibited a hierarchical and fibrous morphology with diameters in the range of 1–2 μm and lengths of tens of micrometers. TEM observations showed that many Ag NPs with diameters in the range of 4–10 nm were well grown on each TiO 2 NW with diameters of 20–40 nm. It was found that the TiO 2 @Ag NW NFs showed catalytic activity for the removal of 4-nitrophenol (4-NP), a representative contaminant. The catalytic removal efficiency of 4-NP by the TiO 2 @Ag NW NFs in the presence of visible light irradiation (0.639 min −1 ) was 3.2-fold higher than that in the absence of light irradiation (0.199 min −1 ), indicating that the TiO 2 @Ag NW NFs exhibit visible light-enhanced catalytic activity.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zijie Qu,Shihan Yu,Miao Li,Yumeng Chen,Xia Liu,Xia Zhang,Guodong Zhang,Xiufeng Wang,Fang Wang,Zhiqing Zhang,Ting Zhou
This study designed and synthesized a Fe 3 O 4 @PDA@Ag-Au NPs nanocatalyst featuring a “core-shell-satellite” structure, aimed at efficiently reducing 4-nitrophenol through photothermal catalysis. Under 808 nm near-infrared laser irradiation, the material demonstrated exceptional photothermal performance and catalytic activity. The reduction rate of 4-nitrophenol reached 90.35 %, with a reaction rate constant of 0.1397 min −1 , significantly surpassing that of a water bath heating system at the same temperature. The high efficiency was attributed to two synergistic effects: the photothermal conversion facilitated by the polydopamine shell and the unique resonance effect exhibited by Ag-Au bimetals. This synergy elevated the system’s equilibrium temperature to 50.7 °C (12.8 °C higher than that of pure water) and generated active site pairs on the Ag-Au interface. These sites enhanced critical reaction steps, thereby reducing the activation energy to 13.8 kJ·mol −1 ,a reduction of 24.0 % compared to that observed in the water bath system (18.3 kJ·mol −1 ). This catalyst could be easily recovered using magnets and maintained over 90 % efficiency after seven cycles. By integrating photothermal catalysis, bimetallic synergy, and magnetic separation, this study presents a novel strategy for developing efficient and recyclable catalysts with significant potential for addressing nitroaromatic organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1685-1692
·
IF 3.086
Min Hong,Lidan Xu,Fangli Wang,Shuling Xu,Haibo Li,Chen-zhong Li,Jifeng Liu
Graphene oxide-supported hollow Au–Ag alloy nanocages (AuAgNC/GO) with tunable shell composition were in situ fabricated by employing a galvanic replacement reaction (GRR) between HAuCl4 and Ag nanoparticles loaded on graphene oxide nanosheets (AgNP/GO). AgNPs on the graphene oxide nanosheets were first synthesized as sacrificial templates by the microwave method. The as-synthesized hybrid materials were characterized by TEM, EDX, HAADF-STEM, XRD and XPS. On the well-known 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) in the presence of excess borohydride, AuAgNC/GO as a solid phase heterogeneous catalyst has been investigated, which exhibited a short induction time, high catalytic activity and good stability against agglomeration for the reduction.
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.7
Zhihong Zhu,Liqun Shen,Cheng Yu,Yang Li,Bo Zhang,Lingfei Hua,Zhibo Leng,Zijie Li
D-Tagatose is a low-calorie rare sugar with glycemic control and obesity prevention benefits, making it a promising functional sweetener. One-step epimerization of D-fructose to D-tagatose by D-tagatose 4-epimerase (T4E) is an attractive approach, but current T4Es suffer from low activity and poor thermostability. To address this, a novel T4E from the Thermoproteales archaeon (TaDt4e) was identified and engineered. A truncation variant Δ104–123 increased activity by 76.9%, and directed evolution produced the double mutant S46A/I113M with a 153.8% increase over wild-type enzyme. Using 100 g/L D-fructose, whole-cell biotransformation with S46A/I113M achieved 12.1% conversion within 10 min, and the purified enzyme reached 23.8% within 90 min. These results show that coordinated engineering of noncatalytic and active-site regions can substantially improve the catalytic performance of TaDt4e. This study not only identifies TaDt4e as a promising candidate for D-tagatose production, but also provides insights into the semirational or rational engineering of T4Es and related enzymes.
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Baoyong Liu,Mei Yang,Hongguang Li
In this paper, an effective approach was successfully developed to synthesize gold nanoflowers (GNFs) using a hydrocarbon/fluorocarbon (CH-CF) hybrid surfactant ( 1 ). Upon mixing with aqueous solution of 1 in presense of AgNO 3 , HAuCl 4 could be reduced into GNFs by ascorbic acid (AA). Influences of aging time, concentration of HAuCl 4 , AgNO 3 , AA and 1 as well as temperature were investigated in detail. GNFs could not be obtained at the absence of AgNO 3 and 1 , indicating that both of them play important roles in the formation of these anisotropic gold structures. Influences of AA and temperature are relatively less pronounced, and well-defined GNFs can be synthesized in a wide range of the concentration of AA (1×10 −3 mol·L −1 to 6 × 10 −3 mol·L −1 ) and temperature (25–50 °C). The GNFs have inhomogenous cores, indicating that they are formed by the aggregation of gold crystals of smaller sizes. A two-stage growth pathway was thus proposed to explain the mechanism of the formation of GNFs. With a large surface-to-volume ratio, GNFs show surface-enhanced Raman scattering for solid R6G with enhancement factors up to a magnitude of 10 6 . They can also be used as efficient catalysts for the reduction of 4-nitroaniline by KBH 4 . The strategy demonstrated here is a facile, rapid, and contrallable one-pot method for the synthesis of GNFs in aqueous solution, which will bring out a wide range of applications.
✓ 已验证
DOI
高影响因子
BIOLOGICAL CONTROL
·
2026
·
IF 4
Ge Zhang,Kuo Huang,Changwen Ye,Qingchang Li,Chen He,Mengmeng Liu,Wei Ding,Qingyuan Hu
Postharvest mold contamination poses a significant threat to the quality and economic value of cigar tobacco leaves. This study evaluated the efficacy of the biocontrol yeast Pichia terricola N-4 (N-4) at different concentrations (10 6 , 10 7 , and 10 8 CFU/mL, designated JK1, JK2, and JK3) for inhibiting mold. The impact of N-4 on volatile organic compounds (VOCs) and the fungal community of cigar tobacco leaves was investigated using gas chromatography-ion mobility spectrometry (GC-IMS) and high-throughput sequencing (HTS). Results indicated that JK2 and JK3 treatments significantly inhibited mold growth. Importantly, olfactory sensory evaluation confirmed that the effective JK2 treatment successfully controlled mold without introducing off-odors. Furthermore, a double-dish assay demonstrated that N-4 completely inhibited mold outbreaks on cigar tobacco leaves via a gaseous fumigation effect, without requiring direct physical contact. GC-IMS identified 74 VOCs, with 17 exhibiting significant differences ( P < 0.05) among treatments. The relative contents of 2-methyl-1-butanol and 2-methyl-1-propanol were significantly elevated in N-4 treated samples and showed strong positive correlations with the genus Pichia . Fungal community analysis revealed a decrease in α-diversity in all treated samples (MB7, JK1, JK2, JK3) compared to MB0. Although Aspergillus remained the dominant genus natively, the relative abundance of Pichia increased significantly in the high-concentration N-4 treatment (JK3). Spearman correlation analysis revealed strong positive associations between Pichia and key VOCs. This study clarified the inhibitory effects of N-4 and provided systematic guidance for its safe, eco-friendly application in cigar tobacco mold prevention.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xia Yan,Hang Zhao,Xiaofeng Shi,Zhiyuan Yang,Jun Ma
The sensitivity and quantitative accuracy of surface-enhanced Raman scattering (SERS) are the main factors that restrict its application. Here, novel Au nanoscale convex polyhedrons (Au NCPs) were designed and fabricated to solve these problems via an embedded standard, including eight pods and six small protrusions. Spherical Au seeds regrew into different sizes of Au NCPs with a face-centered cubic structure. This morphology is due to the dual mechanism of the 4-aminothiophene (4-ATP) molecule that serves as an internal standard and a surface ligand regulator combined with the regulatory role of hexadecyl trimethyl ammonium chloride. The results show that Au NCPs were enclosed by high-index {12 9 1} facets, which greatly improved the local plasma resonance and reduced the lowest SERS detectable concentration of pyrene in standard seawater to 0.5 nM. An effective reference was produced by embedding 4-ATP with a relative standard deviation value less than 2.97% (in the same batch) and 3.92% (between different batches). Our research offers a new strategy for morphological regulation of metal nanocrystals, which is useful for the preparation of highly sensitive SERS substrates and trace analysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 18
·e53801
·
IF 3
Yulai Zhao,Lianzhi Shen,Yu Yuan,Longqiang Xiao,Jingyu Cai,Zhen Lu,Linxi Hou
Developing low-cost and highly efficient hydrophobic absorbents via simple and environmentally friendly method is demanded for oil-water separation. This paper reports the preparation of hydrophobic absorbents of porous poly(4-tert-butylstyrene- co -divinylbenzene) (poly( t BS- co -DVB)) via high internal phase emulsion (HIPE) template method. The effects of crosslinking degree and internal phase volume fraction on the porous structure and adsorption performance of the absorbents are investigated. As the t BS/DVB molar ratio increases from 1:1 to 4:1, the adsorption performance of poly( t BS- co -DVB) toward hexane first increases to a maximum at a molar ratio of 3:1 and then decreases. As the internal phase volume fraction increases, the specific surface area (SSA) and porosity of the poly( t BS- co -DVB)s notably increase from 33.06 m 2 /g and 84.07% to 102.89 m 2 /g and 92.94%, respectively. When the internal phase fraction is 95 vol%, the obtained poly( t BS- co -DVB) foam with a water contact angle of 140° shows an absorbing capacity as high as 70.21 g/g for dichloromethane. After 10 consecutive adsorption-desorption cycles, the adsorption performance of the poly( t BS- co -DVB) foam shows only a slight decrease, indicating an excellent recycling ability. The obtained poly( t BS- co -DVB) foams exhibit the advantages of facile preparation, high oil absorption capacity and satisfactory recoverability, which enable them potential as sustainable oil adsorbents.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 12
·8556-8563
·
IF 3.3
Zijian Wang,Jiaxin Zhang,Lele Yan,Bo Zhao,Lin Zheng,Haoran Guo,Yuxue Yue,Deman Han,Xianlang Chen,Rongrong Li
4-Chloroaniline (4-CAN) plays an important role in chemical and industrial production. However, it remains a challenge to avoid the hydrogenation of the C–Cl bond in the synthesis process to improve selectivity under high activity conditions. In this study, we in situ fabricated ruthenium nanoparticles (Ru NPs) containing vacancies inserted into porous carbon (Ru@C-2) as a highly efficient catalyst for the catalytic hydrogenation of 4-chloronitrobenzene (4-CNB) with remarkable conversion (99.9%), selectivity (99.9%), and stability. Experiments and theoretical calculations indicate that the appropriate Ru vacancies affect the charge distribution of the Ru@C-2 catalyst, promote the electron transfer between the Ru metal and support, and increase the active sites of the Ru metal, thus facilitating the adsorption of 4-CNB and the desorption of 4-CAN to improve the activity and stability of the catalyst. This study can provide some enlightenment for the development of new 4-CNB hydrogenation catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2023
·Vol. 38
·期 11
·2943-2957
·
IF 2.7
Sun Xiaoqin,Wang Tianyu,Yun Sining
Aurivillius phases with narrow band gaps have attracted extensive interest in the field of photocatalysis, however, they exhibit poor activity due to the low utilization of photogenerated carriers. Herein, a series of S-scheme C3N4@Bi m+1 Fe m-3 Ti 3 O 3m+3 (m = 4, 5, 6) heterojunctions with two-dimensional structures were synthesized by simple two-step method. Compared with single materials, the composites exhibit excellent photocatalytic tetracycline degradation under visible light, and 91.8% of tetracycline can be degraded accompanied with 81.2% of TOC removal within 120 min over C 3 N 4 @Bi 5 FeTi 3 O 15 . The enhanced photocatalytic performance is due to strong interface interaction, high conductivity, and efficient charge separation ability. The mechanism analysis indicates that the C 3 N 4 @Bi 5 FeTi 3 O 15 heterojunction follows an S-scheme heterojunction mechanism with a strong interfacial internal electric field directed from C 3 N 4 to Bi 5 FeTi 3 O 15 , thus, the photogenerated electrons in Bi 5 FeTi 3 O 15 move toward C 3 N 4 , which retains high oxidation ability of Bi 5 FeTi 3 O 15 and high reduction ability of C 3 N 4 to efficiently produce the reactive species, such as O 2 − · and ·OH.
Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）