FOOD CHEMISTRY
·
2026
·
IF 10.4
Mingzhu Liu,Xueyan He,Bo Peng,Jin Wu,Zunquan Zhao,Jialei Bai,Jingran Sun,Yanjun Fang
Highly mimetic enzymatic Mn₃O₄/gold nanoparticle (AuNP) composites were prepared, which catalyze the oxidation of tert-butylhydroquinone (TBHQ) to red 2-tert-butyl-1,4-benzoquinone (TBBQ) for TBHQ detection. Absorbance at 487 nm (A₄₈₇) correlates linearly with TBHQ concentrations in the range of 0.52–50 μg/mL, with a limit of detection (LOD) of 0.063 μg/mL, and a limit of quantification (LOQ) of 0.21 μg/mL. TBBQ quenches the fluorescence of copper/iodine-doped carbon dots (Cu,I-CDs) at 500 nm via the inner filter effect (IFE), forming an “on-off” fluorescence probe for TBHQ. TBHQ concentration correlates linearly with the fluorescence intensity difference (F₀ − F) in the range of 0.31–54 μg/mL, with an LOD of 0.054 μg/mL and an LOQ of 0.18 μg/mL. This study uses a dual-mode detection approach to determine TBHQ in various food samples, with recovery rates ranging from 82.5% to 103.0%. The method is sensitive, accurate, cost-effective, and suitable for the rapidly analyzing of TBHQ in food.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Zheng-En Piao,Jingzhou Guo,Dan Wang,Wei Mao,Yuan Pu,Jian-Feng Chen
2-(4-tert-Butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole (PBD) is one of the most widely used electron transport layer materials in optoelectronic devices, and studies on the solubility of PBD in various solvents are critical for development of solution-processable roll-to-roll electronic devices. In this study, the isothermal saturation method is used to determine the solubility data of PBD in 12 commonly used organic solvents. The experimental solubility of PBD increases gradually with enhanced temperature for the examined temperature range of 283.15–323.15 K in n-hexane, methanol, ethanol, isopropanol, tetrahydrofuran (THF), acetonitrile, ethyl acetate, N-methylpyrrolidone (NMP), toluene, and chlorobenzene, while the temperature ranges were 293.15–333.15 K and 273.15–303.15 K for dimethyl sulfoxide and dichloromethane, respectively. The obtained solubility values of PBD are correlated by three models including the modified Apelblat equation, λh equation, and Yaws equation. Comparison of the calculated Akaike information criterion values resulted in selecting the optimal model for each solvent. Of the five solvents calculated, n-hexane, methanol, toluene, THF, and NMP, the λh equation provides an optimal fit. Both the modified Apelblat equation and the Yaws equation work well in chlorobenzene. Among the other six solvents, the fit of the Yaws equation is the best. These results of solubility provide the basic data for the synthesis of PBD nanoparticles via high-gravity-assisted antisolvent precipitation processing.
研究领域:
材料科学
·
化学工程
·
物理化学
·
光电子学
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jia Sun,Yinsheng Gu,Yingwei Lu,Juntao Hu,Tao Chen,Changfei Zhu,Paifeng Luo
Nowadays, the MA-FA mixed-cation perovskite solar cells (PSCs), demonstrating much higher stability than that of single-cation MAPbI 3 or FAPbI 3 , are still encountering a low-efficiency issue. The main reason is that there existing a lot of defects in SnO 2 electron transport layers (ETLs) and perovskite absorbers. Herein, we develop a synergistic strategy of Rubidium Chloride (RbCl) doping and 4- tert -butylbenzylammonium iodide (tBBAI) passivation to fabricate high-performance MA x FA 1-x PbI 3 mixed-cation PSCs. The alkali halide RbCl is first selected as a novel doping additive to regulate the film properties of SnO 2 and perovskites. Research shows that the negative Cl - ions can combine with uncoordinated Sn 4+ ions due to their strong bonding ability, which can passivate the oxygen-vacancy-related defects and enhance the charge transport of SnO 2 ETLs. Meanwhile, the doped Rb + and Cl - ions may diffuse into perovskite lattices to promote grain growth and reduce the defects of perovskites. Besides, we employ an organic halide salt tBBAI to passivate perovskites and suppress surface defects. Results of deep level transient spectroscopy (DLTS) indicate that SnO 2 and SnO 2 -RbCl based devices have deeper hole traps and large trap densities (Δ E = 0.92 eV, N T = 1.10 × 10 16 cm −3 ; ΔE = 0.93 eV, N T = 2.16 × 10 15 cm −3 ); while tBBAI-treated SnO 2 -RbCl-based devices own a shallower hole trap and a smaller trap density ( ΔE = 0.72 eV, N T = 2.44 × 10 13 cm −3 ); and the corresponding I Pb and I (MA/FA) antisite defeats are also identified. Therefore, our synergistic strategy is effectively able to reduce the defect density and suppress the non-radiative recombination. Consequently, the best-performance MA 0.85 FA 0.15 PbI 3 PSCs achieve an impressive power conversion efficiency (PCE) of 22.54% with a large open circuit voltage ( V oc ) of 1.16 V, which are by far the highest values of MA 0.85 FA 0.15 PbI 3 mixed-cation PSCs.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Haoran Feng,Min Liu,Taotao Tang,Ye Du,Bing Yao,Chengyu Yang,Changjie Yuan,Ying Chen
The present study applied the ozonation process to degrade 2,4-di- tert -butylphenol (2,4-DTBP), an emerging micropollutant detected in typical bamboo pulp and papermaking wastewater (BPPW). The effects of various influencing factors on the degradation performance and corresponding degradation mechanism were investigated. The results showed that ozone could degrade 2,4-DTBP rapidly with a reaction rate constant of (1.80 ± 0.05) × 10 5 M –1 ·s –1 . The removal efficiency of 2,4-DTBP (5 mg/L) could reach 100% when the ozone dosage exceed 6 mg/L in a neutral medium. The presence of coexisting chemicals in BPPW such as Cl – and HCO 3 – promoted the removal performance of 2,4-DTBP. In contrast, NH 4 + and humic acid presented inhibition on 2,4-DTBP removal. The ozonation of 2,4-DTBP was dominated by the ozone molecule, and this was primarily attributed to electrophilic substitution and 1,3-dipolar cycloaddition reactions. Twenty-seven kinds of intermediate products were identified by UPLC-Q-TOF/MS. The variations in their productions were based on the changes in ozone dosage. The degradation pathways were proposed. The toxicity of 2,4-DTBP was weakened after ozonation. As for the ozonation of actual biochemical effluent of BPPW, the desirable treatment performance was obtained. This study proved the feasibility of ozonation and provided data basis for subsequent pilot study.
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Polymers
·
2019
·Vol. 11
·期 12
·2048
·
IF 3.164
Qinrui Zhu,Dagang Li
Interface optimization in preparing natural fiber based biocomposite becomes a key factor that determines overall properties, especially mechanical performance. The solution for upgrading interfacial adhesion stemmed from polar fiber and nonpolar polymer remains unclear. Here, a kind of pulp fiber/acrylonitrile-butadiene-styrene (ABS) composite with content ratio of 1:1 was fabricated by functionalizing the cellulose fiber to coordinate interaction between fiber and ABS. With addition of 5 wt % polyacrylamide (PAM) there existed an interlinked three-element structure in composite. Three types of treatment to cellulose fiber, including alkali immersion, pivaloyl chloride grafting for 10 h and 20 h were conducted. Pulp fiber that was treated with alkali for one hour, followed by pivaloyl chloride reaction for ten hours, proved to be effective for interfacial adhesion. X-ray Photoelectron Spectroscopy (XPS) analysis reveals 21.9% of carbonyl and 12.1% of ester function in this fiber, which corresponds to oxidation and grafting. For its composite SEM picture displays that most of cellulose fiber are rooted in ABS and evident traces of tearing or fracture can be observed after tension test. DMA test indicates that this modified pulp fiber/ABS composite exhibits great compatibility, because of combined loss modulus peak ranging from 80 °C to 100 °C. Moreover, the well miscible composite has a tensile strength of 58.1 MPa and elastic modulus of 2515 MPa, increasing by nearly 50% and 60% from those of pure ABS, respectively.Keywords:ABS;modification;interfacial adhesion;compatibility;interlinked structure
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IONICS
·
2015
·Vol. 21
·期 9
·2567-2574
·
IF 1.754
Liu Guishen,Ma Yanhui,Hou Xiaodong,huang Yina,Chen Jianpeng,Zhan Guoqing,Li Chunya
1-[3-(N-Pyrrole)propyl]-3-[1-tert-butoxy-carbonylamino-propyl]imidazolium tetrafluoroborate ionic liquid was successfully synthesized and characterized. The ionic liquid was electrochemically polymerized onto a glassy carbon electrode surface using a multi-potential step technique. Morphology and electrochemical properties of the polymerized ionic liquid film electrode were studied with scanning electronic microscopy and electrochemical impedance spectroscopy. Using the polymerized ionic liquid film as a sensing platform, electrochemical behaviors of magnolol were investigated by voltammetry. Under optimal experimental conditions, the oxidation peak currents were linearly related to magnolol concentrations in the range from 5.0 × 10 −8 to 1.0 × 10 −5 mol L −1 . The detection limit calculated from the standard deviation of the intercept was 2.3 × 10 −7 mol L −1 . Practical application of the polymerized ionic liquid film electrode was demonstrated by determining magnolol in the traditional Chinese medicine. The result is consistent with that obtained using high performance liquid chromatography.
Polymerized ionic liquid film electrode fabricated with potential step technique and application in voltammetric sensing of magnolol
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Food Analytical Methods
·
2013
·Vol. 7
·期 7
·1381-1386
·
IF 1.969
Ma Xiaoxing,Wang Juntao,Wu Qiuhua,Wang Chun,Wang Zhi
A new analytical method by graphene-reinforced hollow fiber liquid-phase microextraction combined with high-performance liquid chromatography fluorescence detection was developed for the determination of bisphenol A and 4- tert -butylphenol in bottled juices. Several important experimental parameters were studied to get optimal extraction conditions for the analytes. Under the optimized conditions, the method showed a good performance having a linear response in the range from 0.05 to 10.0 ng mL −1 with the correlation coefficients ( r ) of 0.9965–0.9994 and limits of detection of 0.01 ng mL −1 . The relative standard deviations were in the range from 6.4 to 7.2 % at the spiked concentration of 1.0 ng mL −1 . The method combines the high-adsorption capacity of graphene and the excellent clean-up performance of hollow fiber liquid-phase microextraction and has been successfully applied to the analysis of the analytes in bottled juice samples.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Liping Zhang,Hexia Yuan,Yiyun An,Huitong Li,Yiqing Gao,Huaran Sun
Coking reverse osmosis concentrated water contains refractory organic pollutants . If not treated, it will generate hazardous solid waste that cannot be utilized in the subsequent evaporation and crystallization process . In order to effectively remove organic substances from coking reverse osmosis concentrated water, Ti/PbO 2 electrode, Ti/Ce,Nd-PbO 2 electrode, and Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode were prepared. The electrodes were characterized by scanning electron microscopy, X-ray diffraction spectroscopy, and X-ray photoelectron spectroscopy, revealing that the average crystal grain size of lead dioxide on the surface of the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode is 29.58 nm. The electrochemical performance of the electrodes was tested using cyclic voltammetry and electrochemical impedance spectroscopy , which showed oxidation peaks at 1.37 V, 1.81 V, and 2.1 V for the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode, with a charge transfer resistance of 56.34 Ω. Accelerated life test indicated that the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode has an accelerated lifespan of 1050 min. The effects of interelectrode distance, pH value, current density , and other factors on the electrocatalytic oxidation of 3,5-di-tert-butylphenol by the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode were investigated, achieving a removal efficiency of 98.67 % under optimal conditions. Performance analysis of the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode demonstrated good stability. Treatment of actual coking reverse osmosis concentrated water using the Ti/P(ANI-co-Py)/Ce,Nd-PbO 2 electrode resulted in removal efficiencies of 87.76 %, 47.92 %, and 77.42 % for COD , TOC, and UV 254 , respectively. The current efficiency and energy consumption of electrocatalytic degradation of coking reverse osmosis concentrated water were 9.38 % and 0.15 kWh/g COD. This study provides a better treatment solution for the degradation of organic matter in coking reverse osmosis concentrated water.
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TETRAHEDRON
·
2012
·
IF 3.025
Jian-An Jiang,Wei-Bin Huang,Jiao-Jiao Zhai,Hong-Wei Liu,Qi Cai,Liu-Xin Xu,Wei Wang,Ya-Fei Ji
A concise ‘one-pot’ synthesis of a variety of 4-substituted 1,5-diaryl-1 H -pyrazole-3-carboxylates has been developed in moderate to good yields with excellent regioselectivity . Less cost lithium tert -butoxide has been identified as a base for sterically hindered Claisen condensation to efficiently generate the labile 3-substituted 4-aryl-2,4-diketoesters. Furthermore, extensive studies lead to a ‘one-pot’ process by combination of the Claisen condensation and the Knorr reaction for the synthesis of highly valuable 4-substituted 1,5-diaryl-1 H -pyrazole-3-carboxylates.
研究领域:
有机化学
·
药物化学
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ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
·
2019
·Vol. 74
·期 3
·261-265
·
IF 0.961
Gao-Feng Wang,Shu-Wen Sun,Wei-Bing Wang,Hong Sun,Shao-Fei Song
Two coordination polymers, {[Co(bipmo)(tbip)]·3H 2 O} n ( 1 ) and {[Cd(bipmo)(tbip)]·3H 2 O} n ( 2 ) (bipmo=bis(4-(1 H -imidazol-1-yl)phenyl)methanone, H 2 tbip=5- tert -butylisophthalic acid), were synthesized by solvothermal methods and structurally characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. The results from single-crystal X-ray diffraction data indicate that the solid state structures of 1 and 2 consist of metal-aromatic carboxylate layers, which are pillared by weak interactions to generate a three-dimensional network. The topological structures of 1 and 2 are uninodal nets based on 3-connected nodes with the Schläfli symbol of {6 3 }.
研究领域:
无机化学
·
材料科学
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高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Yun Huang,Weida Zeng,Peirong Li,Qiang Liao,Ao Xia,Xianqing Zhu,Xun Zhu
Microalgal biofilm is one of the most promising candidates for renewable feedstock accumulation and carbon neutralization. To synergistically enhance cell adhesion during the microalgal biofilm formation stage and detachment during the harvesting stage, a surface possessing controllable properties is expected. However, the enhancement of the adhesion capacity of a conventional N-isopropylacrylamide (NIPAM) coating to microalgal cells only happens when the temperature reaches its lower critical solution temperature (LCST) of 33 °C, but at the optimum growth temperature of microalgae (25 °C) its adhesion capacity is dramatically weakened. In this study, a nondependent and environment-friendly thermoresponsive coating with a flexible LCST (22.3–25.0 °C) was prepared by cross-linking poly(NIPAM-co-N-tert-butylacrylamide) onto polydopamine to accelerate the adhesion of microalgal cells onto the coating at the optimum growth temperature of microalgae (25 °C). The coatings exhibited outstanding temperature-switchable performance due to competition between hydrophobic groups and hydrophilic groups in polymer molecules. Based on the temperature-switchable characteristic, the adhesion density of Chlorella sorokiniana MB-1 (C. sorokiniana) on the coating was increased by 49.4% compared to the conventional coating at 25 °C. Meanwhile, at 15 °C, the detachment efficiency of these cells on the coating reached 96.5%. The energy barrier between the C. sorokiniana and the coating was reduced by 54.8% compared to that of these cells on conventional coating, resulting in excellent cell adhesion and release. This report not only designs smart polymers for adjusting the adhesion of microalgal cells but also provides a sustainable strategy for microalgal biofilm cultivation.
研究领域:
生物材料学
·
环境科学
·
高分子化学
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高影响因子
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
·
2024
·
IF 3.9
Jiawen Cui,Zhenda Liang,Yuhao Liu,Zhiyu Hao,You Tang,Li Zhou,Xiaohua Teng
Environmental endocrine disrupting chemical 4-tert-butylphenol (4-tBP), a widely-utilized surfactant in various industries, poses potential risks to aquatic organisms. Our previous sequencing results suggested that 4-tBP-induced common carp liver injury might be associated with Ca 2+ signaling and autophagy. However, the intricate involvement of these pathways in 4-tBP-induced cytotoxic mechanisms remained unexplored. To bridge these knowledge gaps, this study focused on epithelioma papulosum cyprini (EPC) cells, a significant cell type in fish biology. Initial observations showed that 4-tBP induced a dose-dependent perturbation in Ca 2+ levels. Further investigations, with siRNA and L-type Ca 2+ channel agonist (BAY K8644), identified L-type calcium channel gene CACNA1D as a critical regulator of 4-tBP-induced Ca 2+ overload. Predictive analysis using miRanda platform suggested a potential interaction between miR-363 and CACNA1D, which was subsequently verified through dual-luciferase reporter gene assays. We then established miR-363 mimic/inhibitor models, along with miR-363 and CACNA1D co-suppression models in EPC cells. Through TEM observation, immunofluorescence assay, Ca 2+ staining, and qRT-PCR analysis, we evaluated the role of miR-363/CACNA1D axis in modulating the effects of 4-tBP on Ca 2+ signaling and autophagy. Results showed that miR-363 inhibitor exacerbated 4-tBP-induced increase in CALM2, CAMKII, Calpain2, and p62 expression and also led to decrease in ATG5, ATG7, and LC3b expression. In contrast, miR-363 mimic notably alleviated these changes. Notably, siRNA CACNA1D effectively modulating miR-363 inhibitor's effect. Our study revealed that 4-tBP induced Ca 2+ overload and subsequent autophagy impairment via miR-363/CACNA1D axis. These findings illuminated a profound understanding of molecular mechanisms underlying 4-tBP-induced cytotoxicity and spotlighted a potential therapeutic target.
研究领域:
环境科学
·
毒理学
·
细胞生物学
·
分子生物学
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PubMed
高影响因子
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