FOOD CHEMISTRY
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2026
·
IF 10.4
Zihan Xu,Ziyi Guo,Shengran Yu,Xinyi Shen,Yanqing Cong,Tong Wei,Wenming Pei,Shi-Wen Lv
Herein, a novel porous S-CoO/C composite with spatial confinement effect is synthesized. Notably, doped sulfur can have the reaction with Co site of CoO and trigger the d-p orbital hybridization between 3p orbital of sulfur and 3d orbital of cobalt. The d-p orbital hybridization effect can not only increase the content of oxygen vacancy, but also drive the transformation of Co sites from low to high spin states. Benefitting from these changes, more unpaired electrons are generated in S-CoO/C. As a result, the S-CoO/C exhibits moderate oxidase-like property and excellent peroxidase-like activity. In view of the superb peroxidase-like activity of S-CoO/C, a colorimetric assay is proposed for detecting H 2 O 2 and hydroquinone using TMB as the substrate, and developed detection methods have great advantage being a low LOD, a high recovery and a broad linear range. Furthermore, established colorimetric assay displays excellent analysis performance even in real samples.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Muhammad Yasir Nawabi,Waqar Uddin,Gang Hu
A Briggs-Rauscher oscillating system has been established for the identification of the isomers of monochlorophenol (MCPs). The samples were assessed, based on their different perturbations behavior’s, in the reaction, over the concentration range of 1.5 × 10 -8 to 1.25 × 10 -3 molL 1 . In the system; substrate malic acid, and a complex macrocyclic nickel [NiL](ClO 4 ) 2 catalyst were used. The obtained data have shown that individually injected isomers at the same concentration, give distinct perturbation behaviors. 2- Chlorophenol (2-CP) caused a change in period of oscillation, at the lower concentration but 3-Chlorophenol (3-CP) and 4-chlorophenol (4-CP) did not show their reactivity, while at the higher concentration, 2-CP quenching the oscillation that could not be regenerated, 3-CP show stability in the system, However, 4-CP caused the change in the period of active oscillation. Linear regression analysis relationships were found, in the change of oscillation period and the decrease of oscillation number to the increases of concentration of 2-CP and 3-CP. The detection of limits was 6.75 × 10 -8 molL -1 and 1 × 10 -3 molL -1 for 2-CP, and 4-CP respectively. The oxidizing process of 2-CP and 3-CP, described on the base of the suggested FCA (Furrow-Cervellati-Amadori) model. The formation of product of 2-CP and 4-CP in reaction was identified by UV-spectroscopy .
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ChemPlusChem
·
2023
·Vol. 88
·期 7
·e202300247
·
IF 3.4
Libao Han,Minghuo Wu,Yufeng Hu
Graphical A colorimetric detection method based on Fe 3 O 4 /SnS 2 composites was established for the detection and discrimination of ten phenols for the first time. The incorporation of the photo catalyst SnS 2 significantly improved the peroxidase-like activity of Fe 3 O 4 , leading to an enhancing efficiency of the colorimetric detection method. The developed method could rapidly determine the total phenols in real water samples. Phenols pose a great threat to human and environment due to their high toxicity and low bio-degradability. Therefore, the development of a rapid and sensitive detection method for multiple phenols is of great importance. Here, a colorimetric detection method based on Fe 3 O 4 /SnS 2 composites was established for the detection and discrimination of ten phenols for the first time. The results demonstrated that the incorporation of the photo catalyst SnS 2 significantly improved the peroxidase-like activity of Fe 3 O 4 , leading to an enhancing efficiency of the colorimetric detection method. The developed method was capable of detecting phenol within a concentration range of 0.5–2000 μM, with detection limit as low as 0.06 μM. This method was successfully applied to detect total phenols in samples obtained from two sewage treatment plants and seawater. Furthermore, by employing principal component analysis, the established colorimetric method enabled the simultaneous discrimination of all ten phenols. The performance was further evaluated by accurately identifying binary or ternary mixtures of phenols, and even identifying the type of phenol in 10 unknown samples containing one of the ten phenols. These findings highlight the potential of the Fe 3 O 4 /SnS 2 composite as a promising candidate for the simultaneous detection of multiple phenols in liquid samples.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Jing Zhu,Hongwei Jiang,Wenwu Wang
The high toxicity and low biodegradability of the phenolic pollutants destroyed the balance of the environment and influenced human health seriously. Here, we developed a three-dimensional coloremetric sensor array for discriminating and determinating phenolic pollutants basing on the distinct Cu/nucleotides MOFs . Firstly, three laccase-mimic Cu/MOFs (Cu/AMP, Cu/CMP, and Cu/GMP) were obtained by regulating the molar ratio of Cu 2+ and nucleotides. Then the Cu/MOFs as the recognition elements of the sensor array catalyzed the pollutants-4-AAP-H 2 O 2 system, obtaining the colored benzoquinone products. Subsequently, the data array obtaining from the combined training matrix (3 Cu/MOFs × 6 pollutants × 5 replicates) was projected into a new dimensional space to obtain the 3D canonical scores, and classified into individual clusters by introducing LDA method. No overlap in their respective LDA plots for the six phenolic pollutants with different concentrations suggested the prominent discriminating performance of the sensor array. Furthermore, the sensor array exhibited high selectivity compared to the “lock-and-key” sensors even other active matrices coexisting in water samples. Importantly, the most influential discrimination factor was used to monitor the levels of the six targets, evidencing the potential application in assessing water pollution and maintaining human health.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Sichang Jiang,Zhi Li,Xiumin Yang,Min Li,Chun Wang,Zhi Wang,Qiuhua Wu
A novel hypercrosslinked polymer (API-HCP) was synthesized using as monomer for the first time. API-HCP exhibited high adsorption affinity toward chlorophenols due to the hydrogen bond, halogen bond and π-stacking interactions. With API-HCP as adsorbent, an efficient solid phase extraction method coupled with high performance liquid chromatography (SPE-HPLC) was established for the sensitive detection of chlorophenols in water and honey samples. Under the optimum conditions, the method provided a good linear response in the range of 0.07–100 ng mL −1 for water and 1.7–500 ng g −1 for honey sample. High sensitivity was achieved, with detection limits (S/N = 3) of 0.02–0.07 ng mL −1 for water and 0.5–1.5 ng g −1 for honey samples. The method recoveries for spiked sample were between 84.0 % and 116.0 %, with relative standard deviations ≤6.1 %. The API-HCP based SPE-HPLC method provided a robust platform for sensitive determination of chlorophenols in water and honey samples.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Min Li,Weihua Liu,Xufeng Meng,Shuofeng Li,Qianqian Wang,Yaxing Guo,Yuanyuan Wu,Lin Hao,Xiumin Yang,Zhi Wang,Chun Wang,Qiuhua Wu
In this work, a novel knitting aromatic polymer (KAP) was fabricated for the first time by knitting ferrocene with 1,3,5-tris(bromomethyl)-2,4,6-trimethylbenzene via Friedel-Crafts reaction, and then the KAP was magnetically functionalized with Fe 3 O 4 nanoparticles to produce a magnetic KAP (M-KAP). Combining M-KAP based magnetic solid-phase extraction with high performance liquid chromatography-ultraviolet detection, a simple and sensitive method was developed for simultaneous determination of six benzoylurea insecticides (BUs) in honey and apple juice samples. In the optimized conditions, a good linearity for the BUs existed in the range of 1.67–1000 ng g −1 for honey sample and 0.500–100.0 ng mL −1 for apple juice sample. The limits of detection were 0.500–1.50 ng g −1 and 0.150–0.400 ng mL −1 for honey and apple juice sample, respectively. Satisfactory recoveries were in the range of 85.5–105.5% with RSDs ≤ 8.3%. The developed method demonstrated an excellent practicability for sensitive analysis of the BUs.
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Additive Manufacturing
·
2022
·
IF 11.632
Qinfei Xu,Wenhan Xu,Yang Yang,Xin Yin,Chenyi Zhou,Jinxuan Han,Xuefeng Li,Yingshuang Shang,Haibo Zhang
3D printed poly (ether ether ketone) (PEEK) parts have attracted considerable attention in the automotive, medical, and aerospace fields in the past two decades. However, the major obstacle to its further application is weak interlayer strength and severe mechanical anisotropy. Herein, amorphous poly (aryl ether ketone) (aPAEK) was designed as an interlayer reinforcement modifier to strengthen the interlayer strength and reduce mechanical anisotropy of 3D printed PEEK parts. By introducing 7 wt% aPAEK in PEEK filaments, the interlayer strength in 3D printed parts increased 130% from pristine PEEK to aPAEK/PEEK blends. The mechanical anisotropy in the XY plane was reduced to 1.1%, and its X-axis and Y-axis tensile strength still reached 89.2 ± 3.3 MPa and 88.1 ± 4.1 MPa, respectively. We demonstrate that these performance enhancements were due to the diffusion and entanglement of aPAEK between the layers. These remarkable results significantly improve the comprehensive mechanical properties of 3D printed PEEK parts, and expand its high-performance applications. This work also yields new insight into the development strategy of additive manufacturing materials by blending.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Mingfeng Yang,Yuqi Zou,Xiao Wang,Xiang Liu,Chunli Wan,Marie Harder,Qun Yan,Jiangkun Nan,Ioanna Ntaikou,Georgia Antonopoulou,Gerasimos Lyberatos,Yi Zhang
Polyhydroxyalkanoates (PHA) are a class of intracellular storage polymers with the potential to supplement/replace petroleum-based plastics. Production of PHA from waste organics can reduce its cost, but toxic carbon sources such as simple aromatics are seldom used. This study investigates the feasibility of mixed toxic phenolics as substrates, utilizing a phenol-acclimated consortium of high PHA accumulation capability. Phenol was employed as the main feedstock, and four kinds of mono- and di-chlorinated phenols (CPs) were individually mixed with it as possible impurities. The inclusion of CPs was found to reduce substrate removal and PHA accumulation rates, compared to phenol alone. The degree of inhibition was positively-correlated with CP concentration, but the mechanisms differed. 2- and 3-chlorinated phenols formed dark, toxic, dead-end products; 4-chlorinated phenol (4-CP) appeared to exert competitive inhibition; and 2,4-dichlorinated phenol acted like an inert component. Transformation pathway study discovered that phenol was degraded via meta-cleavage, while 2- and 3-CPs were transformed into 3-chlorocatechol as the intermediate. FTIR, DSC , NMR, HPLC and elemental analysis were carried out to characterize the extracted polymer. The results show that phenol was converted to poly(3-hydroxybutyrate), while the inclusion of mono-chlorinated phenol promoted the production of PHA containing 3-hydroxyvalerate (3HV) monomers . A recovery test after mild CP exposure found that the affected biomass was able to resume phenol degradation and PHA synthesis immediately after simple aeration, indicating its robustness and applicability in a real industrial setting.
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Analytical Methods
·
2022
·Vol. 14
·期 9
·892-899
·
IF 3.532
Haotian Zhong,Yuting Xue,Bin Liu,Zhengbo Chen,Kai Li,Xia Zuo
Phenols are harmful to the human body and the environment. Since there are a variety of phenols in actual samples, this requires a sensor which possesses the ability to simultaneously distinguish them. Herein, we report a colorimetric sensor array, which uses two nanozymes (Fe–N–C nanozymes and Cu–N–C nanozymes) as electronic tongues for fingerprint identification of six phenols (2,4,6-trichlorophenol (2,4,6-Tri), 4-nitrophenol (P-np), phenol (Phe), 3-chlorophenol (3-CP), 4-chlorophenol (4-CP), and o-nitrophenol (O-np)) in the environment. Nanozymes catalyzed the reaction of hydrogen peroxide, different phenols and 4-aminoantipyrine (4-AAP) to produce different color variations. These signal changes as fingerprints encouraged us to develop a pattern recognition method for the identification of phenols by linear discriminant analysis (LDA). The six phenols at 50 nM have their own response patterns, respectively. Surprisingly, this sensor array had distinguished the six phenols in actual samples successfully.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Juntao Wang,Jiajia Liu,Weihua Liu,Ziwang Liu,Qiuhua Wu,Zhi Wang,Hongyuan Yan
A novel magnetic hyper crosslinked polymer (BTA-MHCP) was prepared by one-pot reaction of benzotriazole, 1,3,5-triphenylbenzene and phenyl-functionalized Fe 3 O 4 @SiO 2 . The BTA-MHCP was then investigated as the adsorbent for the rapid magnetic solid-phase extraction (MSPE) of the 5-nitroimidazoles (5-NDZs) including dimetridazole, metronidazole, secnidazole, ronidazole and ornidazole. The adsorbent showed good adsorption properties for the 5-NDZs. The key factors that affect the MSPE such as extraction time, the amount of sorbent, and the type of eluent and its volume were optimized. Under the optimal conditions, the linear response ranges for the established method were 0.15–100.0 ng mL −1 and 3.9–100.0 ng g −1 for drinking water and fish samples, respectively, with the coefficients of determination ( r 2 ) of 0.9981 to 0.9998. The limits of detection (S/N = 3) for the analytes were 0.02–0.05 ng mL −1 and 0.7–1.3 ng g −1 , and the method recoveries ranged from 92.0% to 101.0% and from 89.9% to 104.0% for drinking water and fish samples, respectively.
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MOLECULES
·
2023
·Vol. 28
·期 24
·8109
·
IF 4.6
Shaohui Jiang,Qingsong Li,Botao Xu,Tao Zou,Yan Zhang,Wei Ping,Qiang Ma
In this paper, a low-temperature thick oil demulsifier with high polarity was prepared by introducing ethylene oxide, propylene oxide block, and butylene oxide using m-diphenol as a starting agent. The main reasons for the difficulty involved in the low-temperature emulsification of extractive fluids were explained by analyzing the synthetic influencing factors and infrared spectra of the star comb polymer (PR-D2) and by analyzing the four fractions, interfacial energies, and zeta potentials of crude oils from the Chun and Gao fields. The effects of PR-D2 surfactant on the emulsification performance of crude oil recovery fluids were investigated via indoor and field experiments. The experimental results indicate that the optimal synthesis conditions for this emulsion breaker are as follows: a quality ratio of ionic reaction intermediates and meso-diphenol of R = 10:1; 1 g of the initiator; a polymerization temperature of 80 °C; and a reaction time of 8 h. Colloidal asphaltenes in the crude oil were the main factor hindering the low-temperature demulsification of the Gao oilfield’s extractive fluids, and the reason for the demulsification difficulty of the extractive fluids in the Chun oilfield is that the temperature of demulsification is lower than the wax precipitation point. The demulsification rate of the Chun oilfield’s extractive fluids reached more than 98% when the PR-D2 concentration reached 150 mg/L at 43 °C. The demulsification rate of the Gao oilfield’s extractive fluids reached more than 98% at a PR-D2 concentration of 150 mg/L at 65 °C. The field experiments show that the Chun oilfield’s extractive fluids can still demulsify after the temperature is reduced to 43 °C in winter. The emulsification temperature of the Gao oilfield’s extractive fluids was reduced from 73 °C to 68 °C, with an excellent demulsification effect.
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POLYMER
·
2023
·
IF 4.6
Yang Yang,Bo Jiang,Yingshuang Shang,Qinfei Xu,Junjie He,Xuefeng Li,Haibo Zhang
The limited diffusion and entanglement of the chains between beads cause pronounced anisotropy in the mechanical properties of 3D printed parts. Therefore, amorphous poly (aryl ether ketone) (aPAEK) containing fluorene groups with high intrinsic strength and good interfacial fusion is synthesized and employed to improve the interlayer adhesion of poly (ether ether ketone) (PEEK) parts. Herein, we designed an aPAEK with high intrinsic strength and good interfacial fusion with PEEK blends. The tensile strength of 30 mol% fluorene groups aPAEK was improved to 75 MPa, and the interlayer strength of 20 wt% blends was increased by 315 % compared to PEEK. Moreover, the selection of an appropriate molecular weight for aPAEK is crucial in maintaining the elevated tensile strength while promoting interlayer diffusion during the printing process. These results highlight a novel strategy for the design and development of blend polymers for interlayer reinforcement in 3D printing applications.
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