CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Hailan Qin,Jingyu Sun,Dongsheng Xia,Haiming Xu,Qilin Yu,Yi Zheng,Yintao Shi
Boosting nonradical ( 1 O 2 , e − and h + ) process to enhance the selective degradation for electrophilicity contaminants is an ingenious strategy. Herein, BiOI/BiOCl heterojunction with rational interface oxygen vacancies (IOVs) concentration was successfully synthesized by ultrasonic method. Moreover, multi-characterization and interference experimental unveiled that the appropriate IOVs concentration can not only effectively reduce the transport resistance of photo-induced carriers but also boost the nonradical process. Thus, BOC-5 can remove 84% (20 mg/L) tetracycline hydrochloride (TC-HCl) in 1 h and present wonderful insecticidal performance for rotifers. Simultaneously, the quantitative methods of IOVs concentration, the contribution of the active species to the catalytic performance and the contribution of different 1 O 2 source to the total 1 O 2 were established for the first time. Furthermore, the structure–activity relationship between the IOVs concentration and the catalytic properties was firstly constructed. This work provides an inventive idea to purify water pollutants and disinfestation by boost nonradical process via interface defect engineering.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Xin-Qiao He,Yuan-Yuan Cui,Cheng-Xiong Yang
The lack of functional groups or binding sites largely hindered the broad application of microporous organic networks (MONs). Herein, we report the fabrication of the sulfonate group-enriched magnetic MON composite (MMON-SO3H@SO3Na) via the combination of the sulfonic acid group containing the monomer and thiol–yne click postmodification for efficient magnetic solid-phase extraction (MSPE) of benzimidazole fungicides (BZDs) from complex sample matrices. The well-defined core–shell-structured MMON-SO3H@SO3Na was obtained and served as an advanced adsorbent for MSPE for concentrating and monitoring trace BZDs. The MMON-SO3H@SO3Na with numerous sulfonate groups provides plenty of ion-exchange, hydrogen-bonding, and π–π sites, leading to the favorable affinity to BZDs via multiple interaction mechanisms. The MMON-SO3H@SO3Na-based MSPE–high-performance liquid chromatography method afforded a wide linear range, low limits of detection, large enrichment factors, good precisions, and reusability for BZDs. Trace BZDs in complex vegetables and fruit samples were successfully detected by the established method. The MMON-SO3H@SO3Na also exhibited good selectivity toward multiple types of polar contaminants containing hydrogen-bonding sites and aromatic structures. This work provided a new postsynthesis strategy for constructing novel and multifunctioned magnetic MONs for preconcentration of trace analytes in a complex matrix.
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TALANTA
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2021
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IF 6.057
Xin-Qiao He,Yuan-Yuan Cui,Xiao-Hui Lin,Cheng-Xiong Yang
Development of novel functionalized adsorbents for efficient magnetic solid phase extraction (MSPE) is essential for promoting their versatile applications in sample pretreatment. Herein, we report the fabrication of a new polyethyleneimine-600 decorated magnetic microporous organic network nanosphere (Fe 3 O 4 @MON-PEI 600 ) for effective MSPE of trace non-steroidal anti-inflammatory drugs (NSAIDs) from different water samples. The core-shelled Fe 3 O 4 @MON-PEI 600 integrates the synergistic effects of Fe 3 O 4 , MON and PEI 600 , providing facile and effective extraction to NSAIDs via multiple hydrogen bonding , π-π and hydrophobic interactions. The inner MON shell employs π-π and hydrophobic interaction sites and the outer PEI-600 coat acts as the hydrogen bonding doner/receptor, which affords good extraction performance for NSAIDs. Under optimal conditions, the Fe 3 O 4 @MON-PEI 600 -MSPE-HPLC-UV method gives wide linear range (0.14–400 μg L −1 ), low limits of detection (0.042–0.149 μg L −1 ), good precisions (intra-day and inter-day RSDs < 4.5%, n = 6), and large enrichment factors (97.0–98.2). Extraction mechanisms and selectivity of Fe 3 O 4 @MON-PEI 600 are evaluated in detail. Moreover, Fe 3 O 4 @MON-PEI 600 is successfully applied to enrich the trace NSAIDs in different water samples with the concentrations of 0.7 and 0.8 μg L −1 for 1-naphthylacetic acid, 0.5 and 0.1 μg L −1 for naproxen as well as 0.7 μg L −1 for ibuprofen , respectively. The developed method not only affords a novel and efficient magnetic adsorbent for NSAIDs in aqueous media at trace level, but also provides a new strategy for the rational design and synthesis of multiple functionalized MON composites in sample pretreatment.
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SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Yi Xu,Felix Y.H. Kutsanedzie,Md. Mehedi Hassan,Jiaji Zhu,Huanhuan Li,Quansheng Chen
Accumulation of pesticides in human body via food consumption poses health risks, hence the quantitative detection of pesticides in foodstuffs has become vital. In this study, a rapid and sensitive SERS-based sensor for detecting 2,4-dichlorophenoxyacetic acid (2,4-D) using antibody-functionalized magnetite nanoparticles (antibody-MNPs) as enrichment probe and antigen-MBA-functionalized hollow [email protected] bimetallic nanoflowers ( [email protected] @MBA-antigen) as SERS signal probe was developed. Under the optimized conditions, a wide linear range of 0.001−100 μg/mL for sensing 2,4-D was attained with a low detection limit (LOD) of 0.11 ng/mL. The developed sensor was successfully applied to detect 2,4-D in spiked tea and milk samples with recoveries of 89.73–100.27 % and the relative standard deviation (RSD) values of 2.56–4.97 % obtained. The SERS-based sensor fabricated when validated by the HPLC, no statistical significance differences were obtained based on their computed accuracy and precision values using the student’s t- and F- tests at α = 5%.
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JOURNAL OF CHROMATOGRAPHY A
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2020
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IF 4.049
Xiudan Hou,Hui Yu,Shihai Yan,Junxia Xiao,Min Sun,Wei Wu
The facile preparation and characterization of a cationic polyelectrolyte (polydiallyldimethylammonium chloride, PDDA) fabricated graphene oxide-grafted silica microsphere (PDDA@GO@Sil) with high positive charge density as the sorbent for the high selective capture of acidic herbicides were reported. The theoretical calculation showed that there were strong adsorption energies between the PDDA and analytes, and the main interaction was the hydrogen bonding from O H…Cl and C O…H C. Static- and dynamic- state adsorption results indicated that acidic herbicides were the monolayer coverage onto the PDDA@GO@Sil due to the electrostatic attraction between the sorbent and analytes, and electrostatic repulsion among analytes. Under the optimized conditions obtained with the single-factor experiment and response surface methodology, this established method was used for the enrichment and determination of herbicides in two vegetables. Method detection limits were in the range of 0.75–1.50 µg L −1 indicating that the introduction of PDDA provided the excellent extraction capacity toward acidic herbicides. The obtained results exhibited that the developed method was feasible, reliable, selective and accurate for the determination of acidic herbicides in real samples.
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NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 25
·10654-10661
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IF 3.288
Qi Wu,Wei Wu,Xue Zhan,Xiudan Hou
A simple, facile method was adopted to synthesize three-dimensional chitosan grafted graphene oxide aerogel modified silica (3D CS/GOA@Sil) as an eco-friendly, sustainable extraction material for the preconcentration of phenoxy acid herbicides. An amidation reaction realized the immobilization of CS and GO on the surface of silica, which was followed by a freeze-drying technique to yield the CS/GOA@Sil with 3D architecture structure. The successful synthesis and properties of 3D CS/GOA@Sil were characterized and confirmed by using scanning electron microscopy, infrared spectroscopy, BET adsorption–desorption analysis, and thermogravimetric analysis. The surface area of 3D CS/GOA@Sil was twice that of the individual GO@Sil. Besides, the adsorption and extraction times were also shorter due to the ordered porous structure and rapid mass transfer. Under the optimal conditions, coupled with a high-performance liquid chromatography-ultraviolet detector, this as-established method presented wide linearities with desirable correlation coefficients (≥0.9936) and low limits of detection (≤1.5 μg L−1). Finally, it was applied in the analysis of phenoxy acid herbicides in vegetables, and satisfactory relative recoveries of 62.38–102.92% of spiked standard solutions with different concentrations were obtained.
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FOOD CHEMISTRY
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2019
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IF 5.399
Yehong Han,Zhiqiang Wang,Jun Jia,Ligai Bai,Haiyan Liu,Shigang Shen,Hongyuan Yan
A method based on solid-phase extraction (SPE) coupled with high-performance liquid chromatography (HPLC) was developed to determine the content of 4-chlorophenoxy acetic acid (PCPA), naphthylacetic acid (NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D) in green bell peppers. A molecularly imprinted 3-aminophenol-glyoxal-urea resin (MIAGUR) was first synthesized as a specific SPE adsorbent, which exhibited special selectivity and multiple adsorption interactions including hydrogen bonding and π-π interactions. The quantities of PCPA, NAA and 2,4-D in green bell peppers from 20 samples scattered throughout Baoding city (Hebei province, China) were determined using the proposed method. The results suggested that the use of PCPA, NAA and 2,4-D in green bell peppers from Baoding’s markets is almost in fair. Moreover, MIAGUR-SPE-HPLC is suitable for the specific simultaneous monitoring of PCPA, NAA, and 2,4-D in green bell peppers and has potential applications in determination of PCPA, NAA, and 2,4-D of other plant products.
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MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Xiaoli Guo,Yanting Li,Bo Zhang,Lingling Yang,Xin Di,Xin Di
Herein, magnetic nanoparticle coated with zinc-aluminum layered double hydroxide was successfully synthesized and characterized. The nanocomposite was used as an effective adsorbent to extract three phenoxy acid herbicides in water samples prior to high performance liquid chromatography-ultraviolet detection. An interesting characteristic of this sorbent is that it dissolves under acidic solution (pH < 4). As a result, the elution step was unnecessary, and no organic solvent was used in whole extraction process. Influential extraction factors such as pH of solution, amount of sorbent, type and volume of acidic solution and vortex time were optimized. The method displays low limits of detection (0.1−0.2 ng mL −1 ), good linearity (0.5−200 ng mL −1 ), acceptable precision (relative standard deviations were less than 9.3%) and accuracy (98.9–106.1%). Therefore, the method is sensitive, fast, eco-friendly, and suitable for determination of phenoxy acid herbicides in water samples.
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NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 47
·22621-22632
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IF 3.925
Yifei Zhou,Qiuxiao Wang,Tao Wang,Haixiang Gao
Recently, 2,4-dichlorophenoxyacetic acid, 4-chlorophenoxyacetic acid, and 2-methyl-4-chlorophenoxyacetic acid have been extensively used as herbicides in field crops and they can also act as a plant growth regulator at low concentrations. However, these compounds possess high vapor pressure and high volatility. In this regard, the introduction of ionic liquids (ILs) has emerged as an effective approach to overcome these shortcomings. The present study aimed to prepare a series of ILs with bactericidal activity cations and phenoxyacetic acid series compounds as anions. The synthesized compounds were tested for their physicochemical properties, antibacterial activity and citrus preservation through experiments. ILs showed lower volatility, better soil adsorption capacity, and dual functions of plant growth regulation and antibacterial activity. The tested ILs effectively delayed the aging rate of citrus, reduced the decay rate, inhibited citrus storage diseases, and improved the storage quality of citrus. Overall, the study results provide a theoretical basis for the development of sustainable multifunctional ILs by introducing anions and cations with targeted effects. These newly synthesized ILs allowed us to achieve benefits far exceeding the simple additive rule, improving the physical and chemical properties and reducing environmental pollution by decreasing the amount of chemicals.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2023
·Vol. 24
·期 21
·15722
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IF 5.6
Wanwan Wang,Haiyun Rui,Lei Yu,Nuo Jin,Wan Liu,Chen Guo,Yumeng Cheng,Yonggen Lou
Chemical elicitors can increase plant defense against herbivorous insects and pathogens. The use of synthetic chemical elicitors is likely to be an alternative to traditional pesticides for crop pest control. However, only a few synthetic chemicals are reported to protect plants by regulating signaling pathways, increasing the levels of defense metabolites and interfering with insect feeding. Here, we found that the exogenous application of a phenoxycarboxylic compound, 4-chlorophenoxyacetic acid (4-CPA), can induce chemical defenses to protect rice plants from white-backed planthoppers (WBPH,Sogatella furcifera). Four-CPA was rapidly taken up by plant roots and degraded to 4-chlorophenol (4-CP). Four-CPA treatment modulated the activity of peroxidase (POD) and directly induced the deposition of lignin-like polymers using hydrogen peroxide (H2O2) as the electron acceptor. The polymers, which are thought to prevent the planthopper’s stylet from reaching the phloem, were broken down by WBPH nymphs. Meanwhile, 4-CPA increased the levels of flavonoids and phenolamines (PAs). The increased flavonoids and PAs, together with the degradation product of the polymers, avoided nymphal feeding and prolonged the nymphal period for 1 day. These results indicate that 4-CPA has the potential to be used as a chemical elicitor to protect rice from planthoppers. Moreover, these findings also open a pathway for molecule structure design of phenoxycarboxylic compounds as chemical elicitors.Keywords:chemical elicitor;4-chlorophenoxyacetic acid;lignin-like polymers;white-backed planthoppers;rice;chemical defense
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FOOD CHEMISTRY
·
2018
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IF 4.946
Shijuan Zhang,Ting Xu,Qian Liu,Jiammin Liu,Fengli Lu,Mingbo Yue,Yanxin Li,Zhiwei Sun,Jinmao You
A new cationic gemini surfactant-resorcinol/formaldehyde resin was designed and synthesized. Cationic gemini surfactant was introduced into the resorcinol/formaldehyde resin for the first time and led to the retention of negatively charged endocrine disrupting compounds (EDCs) through electrostatic interactions, hydrogen bonding and π-π interactions. The synthesized material showed good performance in the dispersive micro-solid phase extraction (D-μ-SPE) of EDCs such as alkylphenol and phenoxy acid herbicides from food packaging migrants. Extraction parameters such as pH, adsorbent dose, extraction time and salting out effect were optimized. The limits of detections were in the range of 0.5–0.8 ng/mL, and the recoveries were in the range of 90–100%. The developed method was applied to the analysis of EDCs from food contacting materials migrants with pentachlorophenol, 2,4-dichlorophenoxyacetic acid and bisphenol A detected in the concentration range of 0.2–1.2 mg/kg. It also showed great potential in the D-μ-SPE of other compounds with negative charge or high hydrophobicity.
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JOURNAL OF CHROMATOGRAPHY A
·
2018
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IF 3.716
Xiudan Hou,Sheng Tang,Xingxiang Guo,Licheng Wang,Xia Liu,Xiaofeng Lu,Yong Guo
A highly selective and efficient extraction material was synthesized through the functionalization of guanidyl onto the graphene oxide-grafted silica via a simple chemical modification, which was designed and proposed to improve the enrichment capacity for acidic herbicides. The extraction material was confirmed by scanning electron microscopy, Fourier transform infrared spectrometry, X-ray photoelectron spectrometry, thermal gravimetric analyzer and zeta potential analysis. Theoretical adsorption energies, static- and dynamic-state binding experiments, and comparative experiments with various adsorbents were investigated to elucidate the adsorption mechanism. The introduction of guanidyl endowed the sorbent with stronger Lewis base property and electron-donating ability, hence, excellent extraction recoveries for acidic herbicides could be obtained. Besides, electrostatic and π-π interactions were considered as two major driving impetuses in the adsorption process. Single-factor experiment and response surface methodology were utilized for the optimization of extraction and desorption conditions. Under the optimized conditions, the wide linearities were obtained with correlation coefficients ranging from 0.9904 to 0.9980, and the method detection limits were in the range of 0.5–2 μg L −1 . The relative standard deviation values of the recoveries of five different extractions were 3.0–7.1%. Coupled with high performance liquid chromatography, the as-proposed method was successfully applied to detect five acidic herbicides in Lycium barbarum (Goji). It turned out that the proposed method provided a promising perspective for the selective extraction and determination of polar acidic compounds in complex samples.
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