ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Xiaoxia Han,Songying Qu,Zhanghong Zhou,Rui Zhao,Sui-Dong Wang,Hao Wu
Photoelectrochemical (PEC) biosensing has experienced a notable surge in recent years, while the introduction of plasmonic metal precursors with specific recognition functions into the detection interface remains a nascent area of study. Here, a thermally treated zeolitic imidazolate framework-8 (ZIF-8) decorated with zinc oxide nanorods, incorporating silver ions (Ag+@ZnO/ZIF-8-T), is constructed for the PEC detection of formaldehyde (HCHO) in biological systems. The ZnO/ZIF-8-T photoanode exhibits an unprecedented ability to harvest visible light, with significantly enhanced photoelectric signals compared to its ZnO and ZnO@ZIF-8 counterparts. Upon exposure to HCHO analytes, the incorporated Ag+ ions are in situ transformed into plasmonic Ag nanoparticles sensitized on the ZnO/ZIF-8-T surface, modulating the photoinduced electron injection as revealed by operando transient photovoltage spectroscopy. The proposed PEC platform demonstrates rapid, exclusive, and sensitive HCHO detection with a detection limit of 50 nmol·L–1. This work introduces a new strategy of employing plasmonic metal ions as recognition nodes to couple analyte specificity with photoinduced charge-transfer modulation, opening new avenues for the design of advanced PEC biosensors.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Huai Wang,Zhenyu Yuan,Renze Zhang,Mengran Ran,Liyun Qin,Hanyang Ji,Kaiping Yuan,Fanli Meng
Aniline is not only a type of carcinogen but also the raw material for the preparation of drugs. Therefore, the detection of aniline is of great significance in human health and environmental protection. In this paper, rGO-SmFeO 3 -In nanocomposites were prepared by hydrothermal method for the detection of aniline by combining the excellent properties of rGO and In. The lattice, micro-morphology, elemental distribution and chemical state of the gas-sensitive material were analyzed through XRD, SEM, EDS, and XPS characterizations, which confirmed that the In-doped SmFeO 3 (SFO) nanoblocks-assembled microspheres composited on rGO were successfully prepared, and the nanocomposite possessed abundant oxygen vacancies. The gas sensitivity test results showed that 2 wt% rGO-SFO-1.5 wt% In had excellent gas sensitivity to aniline gas. At 200℃, 2 wt% rGO-SFO-1.5 wt% In had a higher response value of 64.2–100 ppm aniline, which was 6 times that of SFO, and showed a faster response and recovery process (10 s/5 s). In addition, the sensor demonstrated its ability to detect aniline at a lower detection limit of 1 ppb with a response rate of 1.25. Furthermore, the gas sensor was integrated into the embedded system to achieve real-time detection of aniline gas. This study provides a new reference for the development of low detection limit and high sensitivity aniline gas sensor.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
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IF 6
Dan Peng,Qi Zhou,Min Su,Shaoshuai Zheng,Shuli Xie,Jun Li
Low-field nuclear magnetic resonance (LF-NMR) combined with chemometrics was used for the rapidly and nondestructively quantitative determination of carbonyl value (CV) of frying oils during frying process. The quality indices of frying oils during frying process were analyzed as well as the changes of its LF-NMR signal, followed by exploring the correlation between the quality indices of frying oils and the relaxation-characteristic indices and investigating the influences of modeling data and preprocessing methods on the modeling performance. Based on the echo decay curves data of LF-NMR and the relaxation-characteristic indices data, the prediction model of CV was established by partial least square (PLS), principal component regression (PCR), multiple linear regression (MLR), and support vector machine regression (SVR). Results showed that there was a significant correlation between CV and relaxation-characteristic indices ( p < 0.01) with both modeling data and preprocessing methods affecting the model performance. The prediction performance of non-linear SVR model was significantly superior to that of linear modeling methods (PLS, PCR, and MLR). The best prediction model of CV was built using the SVR method based on echo decay curves data. The root mean square error of prediction and coefficient of determination were 2.599 mmol/kg and 0.9873, respectively.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Jingjing Wang,Jinchuan Zhao,Zhihui Wen,Xinjie Wei,Junjie Liao,Liping Chang,Kechang Xie
CeY zeolite sorbent was reported to have a high adsorptive desulfurization selectivity for thiophene. However, only the cerium in the supercage, which is larger than the thiophene molecule, is effective for thiophene adsorption. In this case, regulating the cerium location to anchor it more in the surpercage of Y zeolite is an important issue. Herein, the glycine was used as a complexing agent with cerium to control its size, ensuring that the cerium precursor is in the supercage. G 0.1 CeY were prepared by ion exchange technique with glycine and cerium coordination from NaY. The adsorption capacity of sorbents was measured, and their physical and chemical properties were characterized by XRD, SEM, N 2 adsorption/desorption, NH 3 -TPD, and in situ FT − IR. The glycine complexation could effectively control the location of Ce, so that the G 0.1 CeY has the highest content of Ce located in the supercage. Moreover, in order to further explore the influence of zeolite type, HY was used as the raw material to prepared G 0.1 CeHY in the same way. G 0.1 CeHY has a higher desulfurization performance than that of G 0.1 CeY, whereas the Ce content in its supercage is lower. The NH 3 -TPD and Py-FT − IR results that the medium-strong Brønsted acid of the G 0.1 CeHY sorbent is also effectively for the improvement of desulfurization efficiency. The G 0.1 CeHY exhibits the hightest desulfurization effectiveness (51 %) and the highest breakthrough adsorption capacity of 5.42 mg/g.
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CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Yifan Song,Shumin Hu,Lingyu Zhu,Jiayuan Wang
The successful preparation of starch-based Pickering emulsions typically relies on the use of high-viscosity or high-boiling-point oil solvents. However, these solvents present challenges in removal and limit the applicability of the emulsions. This study aims to investigate the feasibility and effectiveness of employing small-molecule solvents as alternatives for the oil phase. Specifically, quinoa starch granules are used as the emulsifying agent, with a systematic exploration of various small molecules from different solvent categories. This research contributes by identifying the impact of solvent-particle interactions on the feasibility of emulsion formation—an aspect critical but often overlooked in previous discussions on solvent influence on emulsion quality, essential for guiding solvent selection. Furthermore, to address potential challenges associated with maintaining emulsion stability when using low-viscosity oils, a strategy based on exploiting depletion attraction is proposed and demonstrated, leveraging bovine serum albumin as depletants.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
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IF 2
Yuxiang Liu,Hao Wu,Han Yue,Xiwei Hu,Qunsheng Li,Hongkang Zhao
We have determined the solubility of 4,4′-dimethoxybenzophenone (DMBP) in ten monosolvents and three binary solvent mixtures at temperatures ranging from 293.15 to 333.15 K and at atmospheric pressure. The solubility of DMBP in both monosolvents and binary solvent mixtures increases with temperature. The solubility of DMBP is greatest in the solvent benzene and lowest in the solvent methanol. The Apelblat equation is the most suitable equation for DMBP in both monosolvents and binary solvent mixtures, based on the results of our solubility experiment data and the data calculated by the thermodynamic models. The outcomes of the KAT-LSER model indicate that π* and δH play a prominent role in the dissolution behavior of DMBP. The mixing thermodynamic properties (ΔmixG, ΔmixH, and ΔmixS) demonstrate that the mixing process of DMBP is an entropy-increasing and spontaneous process, and whether the process absorbs heat or not is related to the properties of the solvents.
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CHEMOSPHERE
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2024
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IF 8.1
Yue Sun,Jinhui Cao,Jie Ma
The fate of volatile organic compounds (VOC) vapors in the unsaturated zone is the basis for evaluating the natural attenuation potential and vapor intrusion risk. Microcosm and column experiments were conducted to study the effects chemical speciation and soil types/properties on the fate of petroleum VOCs in unsaturated zone. The biodegradation and total attenuation rates of the seven VOCs obtained by microcosm experiments in black soil and yellow earth were also generally higher than those in floodplain soil, lateritic red earth, and quartz sand. The VOC vapors in floodplain soil, lateritic red earth, and quartz sand showed slow total attenuation rates (<0.3 d −1 ). N-pentane, methylcyclopentane, and methylcyclohexane showed lower biodegradation rates than octane and three monoaromatic hydrocarbons. Volatilization into the atmosphere and biodegradation are two important natural attenuation paths for VOCs in unsaturated soil columns. The volatilization loss fractions of different volatile hydrocarbons in all five unsaturated soils were generally in the order: n-pentane (93.5%–97.8%) > methylcyclopentane (77.2%–85.5%) > methylcyclohexane (53.5%–69.2%) > benzene (17.1%–73.3%) > toluene (0–45.7%) > octane (1.9%–34.2%) > m-xylene (0–5.7%). The fractions by volatilization into the atmosphere of all seven hydrocarbons in quartz sand, lateritic red earth, and floodplain soil were close and higher compared to the yellow earth and black soil. Overall, this study illustrated the important roles chemical speciation and soil properties in determining the vapor-phase transport and natural attenuation of VOCs in the unsaturated zone.
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Journal of Coatings Technology and Research
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2024
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IF 2.3
Yu Tianlong,Song Gendi,Tian Wenjie,Liu Tingting,Yan Mengying,Wu Bei,Lu Shixiang
Superwetting materials play a crucial part in the fields of chemistry and materials science and draw increasing attention. Among the various applications, superwetting materials demonstrated up-and-coming potential in oil spill remediation. Herein, we report on the preparation of silver-coated copper mesh via a facile chemical deposition and annealing treatment approach that requires neither complex devices nor modification with toxic organic molecules. The resulting sample exhibited remarkable water repulsion (water contact angle of ~ 158° and sliding angle of ~ 1°) and oil affinity (oil contact angle of ~ 0°), contributing to superior separation ability toward various oil–water mixtures (hexane, toluene, benzene, chloroform, tetrachloromethane, kerosene, gasoline, diesel) or effectively cleaning up the floating or underwater oil spill. Moreover, the resulting silver-coated superhydrophobic/superoleophilic copper (Ag-coated SS Cu) mesh demonstrated great durability upon the water flow impact or the abrasion test and was able to continuously separate the toluene–water mixtures over 20 times with an efficiency over 97%. In addition, the sample readily prevented surface fouling via self-cleaning process and exhibited antibacterial ability toward Escherichia coli , Staphylococcus aureus , and Bacillus subtilis as witnessed by the corresponding bacteriostatic circle (11.38 ± 0.76 mm, 12.65 ± 0.68 mm, and 12.87 ± 0.72 mm, respectively) in the Petri dish.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Xin Ma,Shimin Wu
Parent and oxygenated polycyclic aromatic hydrocarbons (PAHs and OPAHs) have gained increasing attention due to their toxicity. However, their formation mechanisms during baking remain unclear. This study aimed to elucidate their formation pathways from amino acids in baking systems. The effects of five amino acids on PAH24 and OPAH12 levels in bread were investigated. Phenylalanine addition (2%) caused the most significant 15-fold increase in the toxic equivalent quotient of PAH36. Stable isotope tracing technology revealed that both the phenyl ring and C3 atom of phenylalanine were incorporated into benzo[a]anthracene and 9-fluorenone, proving the transformation of phenylalanine into PAHs and OPAHs. By nontarget analysis and chemical reactivity analysis, styrene, (E)-stilbene, and benzophenone were identified as key intermediates in the formation of naphthalene, benzo[a]anthracene, and 9-fluorenone, respectively. Overall, this study first proposed the formation pathways of PAHs and OPAHs from phenylalanine, offering guidance for reducing their health risks during baking.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Rui Feng,Zhou Fang,Wei Wang,Tianbo Li,Xiaoyan Hu,Xinlong Yan,Zhongdong Zhang
Direct hydroxylation of benzene to phenol is an environmentally friendly strategy to produce phenol compared with the conventional process. In this work, vanadium-modified titanium silicate-1 (TS-1) with enhanced Lewis acid and charge density were prepared as catalysts for efficient hydroxylation of benzene to phenol in the presence of hydrogen peroxide as an oxidant under mild conditions. The hierarchical TS-1 zeolites with a high framework Ti content were synthesized in the presence of NH4HCO3, and then vanadium doping was used to change the acidity and charge density. It was found that NH4HCO3 favored the titanium substitution of framework sites and nanocrystal stacking of TS-1. Vanadium doping increased the amount of Lewis acid sites and the charge density associated with the framework Ti. The enhancement in acid and electron characteristics boosted the intrinsic catalytic reactivity of Ti-OOH species, which further improved the performances toward benzene hydroxylation. The presented strategy and mechanistic results clarified the relationship between the structure and acidity in TS-1 zeolite. It was also verified that hydroxyl radicals (•OH) rather than superoxide radicals (•O2–) were the reactive agents responsible for the consecutive selective oxidation of benzene.
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JOURNAL OF CHROMATOGRAPHY A
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2024
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IF 3.8
Xueping Tao,Mengting Su,Panpan Chen,Meiting Yan,Dan Wang,Lan Xia,Li Rao,Zhining Xia,Qifeng Fu
In recent years, mussel-inspired polydopamine (PDA)-based materials have attracted significant attention in the field of open-tubular capillary electrochromatography (OT-CEC) owing to their diverse and appealing properties. However, previously established functionalized PDA coating-based CEC stationary phases predominantly relied on the latent reactivity of PDA with amine/thiol-containing molecules, limiting the types of applicable modifiers and requiring time-consuming reaction processes. Herein, we presented a versatile and efficient method for the facile and rapid fabrication of diverse functionalized PDA coatings as OT-CEC stationary phases through a Zr(IV) coordination-mediated post-modification strategy. Different kinds of modifiers, including octadecylamine (ODA), lauric acid (LA), and perfluorooctanoic acid (PFOA), were rapidly and robustly grafted onto the PDA coating, verified through multiple characterization techniques. The influences of preparation parameters on the grafting efficiency of the functionalized PDA coating were systematically investigated. Utilizing the Zr(IV)-mediated ODA-, LA- and PFOA-functionalized PDA-based OT-CEC columns, we achieved high-efficiency baseline separation of a series of neutral analytes with excellent repeatability, good stability, and long lifetime. Given the strong universality of the Zr(IV) coordination-mediated post-modification approach, our study provides an effective pathway for advancing the development of a wider range of functional PDA-based chromatographic stationary phases.
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WATER RESEARCH
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2025
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IF 12.4
Lingyou Meng,Zhuo Li,Binhong Qu,Peng Li,Jianhui Sun,Yang Qu,Ziqing Zhang,Liqiang Jing
The ultrasensitive, visual and intelligent identification of persistent chlorophenols (CPs) in complex drinking and environmental water matrices is highly desirable. In this study, we have established an interesting colorimetric dye eosin Y (EY)-molecular imprinted Bi 4 O 5 Br 2 nanosheet photosensitization sensing system for CPs detection, in which the key is the rapid EY photosensitization decolorization to be efficiently inhibited in the presence of CPs. It displays an ultrasensitive detection of CPs, especially for the typical 2,4,6-trichlorophenol (TCP) across from 10 ng·L −1 to 1 mg·L −1 , achieving a limit of detection of 7 ng·L −1 with remarkable selectivity. By means of in-situ Fourier transform infrared spectroscopy, time-resolved laser flash photolysis spectroscopy, and theoretical calculations, the outstanding performance is attributed to (i) the efficient transfer of triplet excited state electrons from EY to the ultrathin Bi 4 O 5 Br 2 (∼4 nm) nanosheets through energy band alignment and (ii) enhanced TCP selective adsorption resulting from a planar adsorption configuration induced by multiple Bi–Cl interactions, along with specific molecular imprinting recognition sites. Additionally, a real-time intelligent sensing platform was further engineered by integrating automatic sampling, an optical fiber source and a smartphone with color recognition software, enabling convenient and visual detection of TCP in challenging water environments. The sensing system exhibited excellent performance in detecting TCP across various actual water matrices, achieving acceptable recovery rates ranging from 93.33% to 113.33% with the relative standard deviations between 0.80% and 11.31%. It also demonstrated significant advantages over the ultra-performance liquid chromatography-tandem mass spectrometry, particularly regarding speed, simplicity and sensitivity, thus indicating substantial potential for practical applications in water quality monitoring.
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