JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2026
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IF 5.3
Lei Wang,Yue Huang,Jiawei Su,Haojie Su,Weihao Shen,Sanqing Huang,Xueqin Zhao
Ensuring food safety requires reliable methods to monitor toxic contaminants like p-aminophenol (p-AP), which can migrate from plastic packaging or accumulate as veterinary drug residues in food products. However, the absence of rapid and field-deployable detection methods poses a persistent obstacle to its effective monitoring. In this work, we developed iron-doped silicon quantum dots (Fe-SiQDs) as a robust peroxidase-mimicking nanozyme and engineered a dual-mode sensing platform for p-AP detection comprising a solution-based assay for laboratory use and a hydrogel strip for on-site smartphone-assisted quantification. The solution assay achieved high sensitivity (LOD: 5.22 μM) with excellent correlation to HPLC (R² = 0.9994), while the hydrogel strip enabled quantification within 15 min without complex instrumentation. The Fe-SiQDs-based hydrogel sensor was tested on real-world food matrices including honey and bottled water, achieving accurate recoveries between 93.2% and 119.5% with high reproducibility (RSD < 2.1%). This cost-effective and field-ready system provides a practical solution for rapid screening of p-AP in food samples, offering a useful tool for food safety monitoring.
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Catalysts
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2026
·Vol. 16
·期 5
·480
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IF 4.5
Qifan Zhao,Kaijie Li,Hongbo Yu,Hongfeng Yin
p-nitrophenol (p-NP) is a pollutant with environmental persistence, bioaccumulation potential, and significant health risks, and is widely dispersed in wastewater, so efficient removal ofp-NP is imperative. Among the various methods, the catalytic reduction ofp-NP top-aminophenol (p-AP) using sodium borohydride (NaBH4) is a particularly promising one and, herein, catalysts play a crucial role. Among the various metals, Au shows unique catalytic activity forp-NP reduction. However, nanosized Au often exhibit limited activity and stability due to their high surface free energy. To address this challenge, we designed and synthesized Au-SnOxhybrid nanoparticles confined within hollow mesoporous silica nanoreactors (Au-SnOx@hm-SiO2) via a soft-template-assisted co-adsorption strategy. The resulting bimetallic Au-SnOx@hm-SiO2nanoreactor showed significantly enhanced catalytic activity toward the NaBH4-mediated reduction ofp-nitrophenol (p-NP) compared with its monometallic Au@hm-SiO2counterpart, owing to the synergistic effect between Au and SnOx. Among various Au/Sn ratios, the catalyst with an Au/Sn molar ratio of 1:0.1 demonstrated the highest activity, achieving complete conversion ofp-NP within 5 min at ap-NP/Au molar ratio of 529:1—a tenfold improvement over Au@hm-SiO2. Moreover, the catalyst maintained high efficiency over six consecutive cycles, with only slight deactivation, benefiting from the protective silica shell.
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POLYMER COMPOSITES
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2026
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IF 4.9
Wencong Tang,Yuxiang Lin,Minmin Mao,Kaixin Song
Dielectric polymer nanocomposites with low ceramic filler loadings are generally regarded as beneficial for suppressing conduction loss and enhancing breakdown strength. However, this conventional assumption overlooks the critical role of filler spatial distribution in governing microscopic electric field uniformity. In this work, 0.6(0.82Bi 0.5 Na 0.5 TiO 3 -0.18Bi 0.5 K 0.5 TiO 3 )-0.4SrTiO 3 (BNKT-ST) lead-free ceramics were synthesized and surface-modified with the silane coupling agent γ-aminopropyltriethoxysilane (KH550). The modified nanoparticles were then incorporated into a poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) matrix to fabricate a series of dielectric nanocomposite films with systematically varied filler contents (0.5–3 wt%). X-ray diffraction (XRD) and Fourier transform infrared (FTIR) confirmed the target perovskite phase of BNKT-ST and the coexistence of α and β phases in the polymer matrix. By combining quantitative image-based analysis of filler dispersion and microscopic electric field simulations, the spatial distribution of KH550@BNKT-ST nanoparticles in the P(VDF-HFP) matrix was systematically clarified: at excessively low filler loadings (≤ 1 wt%), nanoparticles were sparsely and unevenly dispersed; at a critical filler concentration of ~1 wt%, a continuous and spatially uniform insulating network was formed by the nanoparticles; while at higher filler loadings (> 1 wt%), slight agglomeration of nanoparticles occurred. A nonmonotonic dependence of breakdown strength on filler concentration was revealed. The continuous network at ~1 wt% effectively homogenized the local electric field, maximizing breakdown strength at 440 MV/m and an energy density of 8.97 J/cm 3 . This study demonstrates that low ceramic filler content does not inherently guarantee superior dielectric performance, and highlights the necessity of a critical filler threshold for achieving electric field homogenization in polymer-based dielectric nanocomposites. Highlights A nonmonotonic effect of filler content on breakdown strength is discovered. Quantitative analysis of filler dispersion is conducted to explain the mechanism. The underlying mechanism is revealed via phase-field simulation/analysis. The 1 wt% BNKT-ST/P(VDF-HFP) nanocomposite shows superior performance. This work provides guidance for designing high-energy-density dielectrics.
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Functional Materials Letters
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2019
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IF 1.388
Lin Zhao,Yanzhao Xie,Qiuyu Lin,Rongze Zheng,Yong Diao
A series of composite catalysts of C, N and P co-doped TiO 2 were prepared by sol-gel method, using a biomass (soluble starch) dopant. The samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), fourier transform infrared (FTIR) spectroscopy. The results show that TiO 2 is co-doped with C, N and P by one step. The resulting composite exhibited higher specific surface area, wider visible-light absorption band with respect to the pure TiO 2 . The sample calcined at 400 ∘ C for 2 h with a doping amount of 6 g soluble starch showed the best electrochemical performance. The C, N and P co-doped TiO 2 was also used for the degradation of methylene blue (MB) and degradation ratio was up to 98% in 80 min under visible light irradiation.
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INORGANIC CHEMISTRY
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2026
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IF 4.7
Yuguo Feng,Caikang Wang,Xueting Wang,Zhijuan Li,Liang Liu,Zihan Zhou,Zhe Xu,Xuanxiao Zhu,Meng Li,Dongmei Sun,Yawen Tang
The development of highly active and durable electrocatalysts for the alkaline hydrogen evolution reaction (HER) is essential for advancing sustainable hydrogen production through anion exchange membrane water electrolysis (AEMWE). In this work, we report the one-pot solvothermal synthesis of Ga-doped Ru nanosheets (RuGa NSs) as a high-performance alkaline HER catalyst, where Ga incorporation is shown to optimize the interfacial water structure to enhance catalytic activity. The optimized RuGa NSs exhibit outstanding alkaline HER performance, requiring a low overpotential of only 18 mV at 10 mA cm–2, coupled with a small Tafel slope of 37.2 mV dec–1. When integrated into an AEMWE device, the RuGa NSs||NiFe-LDH-based AEMWE enables a low cell voltage of 1.74 V to deliver 1.0 A cm–2 in 1.0 M KOH at 60 °C. Moreover, the AEMWE device shows exceptional long-term stability, operating continuously for 200 h at 0.5 A cm–2 with a minimal voltage decay of 5.5%. Operando Raman spectroscopy results demonstrate that Ga doping promotes the dynamic transformation of rigid, hydrogen-bonded water into more mobile free-water molecules. This restructuring creates a favorable local reaction environment by increasing the flexibility of the hydrogen-bond network, thereby facilitating water dissociation and proton transfer.
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高影响因子
Polymers
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2019
·Vol. 11
·期 12
·
IF 3.164
Tingting Chen,Xingqin Fu,Luzi Zhang,Yuejun Zhang
The poly(acryloyloxyethyl trimethyl ammonium chloride–co–acrylamide), P(DAC-AM), is a kind of cationic polyelectrolyte usually applied in a solution form, and its performance is affected by its structure and the environment where it is used. In particular, its viscosity properties in salt solutions are directly related to its efficacy in various applications, and the performance is one of the most important solution properties. Therefore, in this paper, the effects of the salt concentration and valence of seven kinds of inorganic salts, NaCl, LiCl, KCl, MgCl2, AlCl3, Na2SO4, and Na3PO4, on the values of apparent viscosity (ηa) of P(DAC-AM) samples with cationicity of 10%, 50%, and 90%, and intrinsic viscosity ([η]) of 5, 10, and 15 dL/g were investigated. Theηawas determined using a rotational viscometer. The interaction mechanism between the polymers and salt ions was also investigated. The results showed that depending on the salt concentration, theηafirstly decreased sharply to the inflection point which indicated the minimum volume of the molecule shrinking, and then either maintained the value unchanged or increased. The salt concentration corresponding to the inflection point decreased with the increase of the salt ion valence but with the reduction of the cationicity of the polymer. Theηaat the inflection point increased as the [η] of the polymer grew. This indicated that the salt concentration and the salt ion valence had a notable impact on the stretch of the cationic polymer molecule in the salt solutions. It was discovered that the phenomenon of the increase of theηaof P(DAC-AM) samples in the multivalent salt solutions after the inflection point was caused by not only the increase of theηaof the complexes formed from the pure salts, but also the viscosity resistance of the charge and volume between the polymer molecules and salt ions, as well as the complexes themselves. The linear relationship between the increasedηaand the salt concentration, representing the interaction both among the complexes themselves and between the polymer and complexes, was obtained. Furthermore, the interaction model between the salt ions and P(DAC-AM) molecules in a wide range of salt concentrations was illustrated.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2011
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IF 2.089
Xiqian Li,Xiao Zhou,Jun Mu,Lijun Lu,Dachuan Han,Chunmei Lu,Mingtai Wang
We have studied the adsorption of p-aminophenol on poly(aryl ether ketone) containing pendant carboxyl groups (PEK-L). The pH effect, adsorption kinetics, isotherms, and thermodynamics are investigated in batch experiments. The kinetics of the adsorption follows a pseudosecond-order model. Langmuir and Freundlich isotherms are employed to describe the adsorption process, indicating that the former fits the data better. The thermodynamic functions, ΔG°, ΔH°, and ΔS° are calculated. The method is applied to the determination of p-aminophenol in drug tablet samples, and the accuracy is assessed through recovery experiments.
研究领域:
环境化学
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高分子科学
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吸附科学
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化学工程
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分析化学
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FOOD CHEMISTRY
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2022
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IF 9.231
Süreyya Oğuz Tümay,Vildan Sanko,Ahmet Şenocak,Yasin Orooji,Erhan Demirbas,Yeojoon Yoon,Alireza Khataee
Phenolic compounds that are naturally found in food samples are not only an important part of the human diet but also useful bioactive substances for health. Among these, para- coumaric acid ( p- CA) has antibacterial and antioxidant properties and is used in many industrial processes. In this study, the novel MAX-phase material, Nb 4 AlC 3 , was successfully prepared and characterized in detail with various spectroscopic, microscopic and thermal techniques. The sensor performance of Nb 4 AlC 3 modified glassy carbon electrode (Nb 4 AlC 3 @GCE) was evaluated and analytical parameters were calculated. Experimental conditions such as pH and amount of modifier were optimized with differential pulse voltammetry (DPV) measurements. The real samples analyses of lemon, apple and pomegranate were applied for determination of p- CA with Nb 4 AlC 3 @GCE sensing system under the optimized conditions. The accuracy was evaluated by spike/recovery and high-performance liquid chromatography analysis, which accounted for high accuracy of the Nb 4 AlC 3 @GCE sensing system. The limit of detection, limit of quantification, linear working range and relative standard deviation (%) of the Nb 4 AlC 3 @GCE sensing system were determined as 0.28 and 0.85 µmol/L, 0.8–80.0 µmol/L, 3.17 %, respectively. The results showed that the proposed sensing system has the high precision at lower concentration of p- CA.
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Journal of Environmental Sciences
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2022
·
IF 6.796
Yong Wang,Cheng Liu,Haoyun Hu,Qiujun Lu,Haiyan Wang,Chenxi Zhao,Fuyou Du,Ningli Tang
The construction and application of novel highly efficient photocatalysts have been the focus in the field of environmental pollutant removal . In this work, a novel CuFe 2 O 4 /Bi 12 O 17 Cl 2 photocatalysts were synthesized by simple hydrothermal and chemical precipitation method. The fabricated CuFe 2 O 4 /Bi 12 O 17 Cl 2 composite exhibited much higher photocatalytic activity than pristine CuFe 2 O 4 and Bi 12 O 17 Cl 2 in the removal of bisphenol A (BPA) under visible-light illumination, which ascribed to the intrinsic p-n junction of CuFe 2 O 4 and Bi 12 O 17 Cl 2 . The photocatalytic degradation rate of BPA on CuFe 2 O 4 /Bi 12 O 17 Cl 2 with an optimized CuFe 2 O 4 content (1.0 wt.%) reached 93.0% within 30 min. The capture experiments of active species confirmed that the hydroxyl radicals (•OH) and superoxide radicals (•O 2 − ) played crucial roles in photocatalytic BPA degradation process. Furthermore, the possible degradation mechanism and pathways of BPA was proposed according to the detected intermediates in photocatalytic reaction process.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Yanyan Chen,Manlin Zhang,Tiantian Chen,Ganbing Zhang,Hui Xu,Hongwei Sun,Lizhi Zhang
The application of powdered nanoscale zero-valent iron (nZVI) in conventional reactors for water treatment is limited by insufficient mass-transfer and difficult post-separation of catalysts. Herein, a novel microreactor was constructed by anchoring nZVI on the reduced graphene oxide/polypyrrole nanocomposite (rGO/PPy) substrate within the microchannel of a stainless-steel tube through two-step electrodeposition , which catalyzed the Fenton-like reaction to remove > 99% p-nitrophenol (PNP) within 50 s, outperforming traditional batch reactors. The rGO/PPy composite substrate consolidated the adhesion on steel surface, stabilized the nZVI by forming electron-transfer complex, facilitated the decomposition of H 2 O 2 to free •OH, and promoted the redox cycle of Fe(III)/Fe(II) via the electron donating capacity of rGO/PPy. Besides, the significant convection and highly-effective mass transfer within the microreactor also contributed to the ultrafast PNP removal. With acceptable durability, easy re-generation, and scalability, the rGO/PPy/nZVI microreactor is promising for the ultrafast removal of pollutants from water.
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Journal of Water Process Engineering
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2022
·
IF 7.34
Jiajie Xing,Qian Peng,Wanling Zhong,Yingjie Zhang,Xin Wang,Kun Liu
A novel CuO-Chrysotile thin membrane catalyst was prepared by simple impregnation-calcination route, which provided new insights of catalytic membranes by natural mineral fiber for the degradation of organic contaminants in wastewater treatment . Through intermittent and continuous catalytic degradation experiments, peroxymonosulfate (PMS) was efficiently activated by the membrane to degrade p-nitrophenol (PNP), and the effects of experimental parameters (including initial solution pH value, PMS dosage, catalyst dosage, reaction temperature, membrane mass and flow rate) on PNP degradation were systematically studied. The results showed that the catalytic membrane had great catalytic performance and long-term stability, it could completely degrade 10 mg/L of PNP within 60 min and its degradation ratio could remain above 90 % after 5 cycles. Meanwhile, it was worth noting that 0.15 g of CuO-Chrysotile catalytic membrane used as fixed bed could continuously degrade 12.5 L of PNP solution with gratifying performance, which proved that the catalytic membrane had convenient use method and great application effect. The mechanism study found that 1 O 2 produced in this process played a key role in the degradation of PNP. From the aspects of manufacturing cost, catalytic performance and service life, the novel CuO-Chrysotile catalytic membrane has excellent industrial application potential.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yan Wang,Guangshe Li,Chang Liu,Xinbo Li,Liping Li
Metal geometrical structure engineering of composite catalysts is powerful to boost their photocatalytic performance of hydrogen evolution . Herein, by rationally designing, transition metal phosphides (TMPs) have been loaded onto the P doped g-C 3 N 4 (PCN) to construct catalysts TMPs/PCN. For the first time, the effect of geometrical structure of TMPs on the photocatalytic activity is optimized and a geometrical-site-dependent photocatalytic hydrogen evolution is experimentally determined. Tri-metallic FeCoNiP/PCN, having 59.6% occupancy of tetrahedral cobalt sites, gives hydrogen production rate of 205 μmol/g/h, better than that of mono-metallic (FeP, CoP , NiP), bi-metallic (FeCoP, CoNiP, FeNiP) TMPs/PCN, and even much superior to that of Pt/b-g-C 3 N 4 and Pt/PCN. Trimetallic TMPs/PCN catalysts also show excellent OER performance. In addition to the efficient electron transfer between FeCoNiP and PCN, which can effectively improve the separation of photogenerated carriers, the high occupancy of tetrahedral cobalt sites of FeCoNiP as a co-catalyst promotes the formation of active intermediates, being the key to significantly improve the catalytic performance of ternary FeCoNiP/PCN. The findings in this work, especially about a link of the photocatalytic performance of TMPs/PCN composites and occupancy of tetrahedral cobalt site in co-catalysts TMPs, can open new occasion for creating novel composite catalysts and extending to other applications.
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