International Journal of Environmental Research
·
2022
·Vol. 16
·期 2
·1-12
·
IF 3.229
Tan Mengyu,Sun Yue,Gui Jiaxi,Wang Jingli,Chen Xu,Wu Donglei
Plastics are common raw materials of products originating from human activities. Their physical nature may include disintegrated small granules or fragments with particle size less than 5 mm—microplastics (MPs) which are considered as emerging contaminant in the environment. Previous research has demonstrated that organic solid waste (OSW) was contaminated by microplastics. Subsequent to biological treatment, OSW products such as compost and biogas residues would be mixed the soil as fertilizers or conditioners; while, the MPs in these OSW would also enter the soil at the same time, imparting potential ecological risks. Thus, it is important to detect the MPs in biologically treated OSW products. However, it was unknown whether some of the digestion and separation methods could be used to effectively extract MPs in these typical OSW, limiting the research on MP abundance in these OSW and restricting the comparability of relevant studies. Therefore, the present study compared the effects of seven digestion protocols on the MPs and organic matter, and the most suitable protocol containing 30% (v/v) H 2 O 2 was determined. Furthermore, the recovery rates of spiked MPs were used to evaluate three separation methods. The results showed that the two-stage density separation of NaCl solution (ρ = 1.19 g·cm −3 ) and NaBr solution (ρ = 1.53 g·cm −3 ) was optimal, and the recovery rate of spiked MPs by two-stage density separation was higher than 86%. Based on these results, the scheme of “30% (v/v) H 2 O 2 pretreatment and two-stage density separation” was constructed for MPs extraction from biologically treated products of OSW, which could be applied to the related studies.
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POLYMER BULLETIN
·
2021
·Vol. 79
·期 2
·1057-1068
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IF 2.87
Zhang Yue-Fei,Tang Jian,Li Tao,Liu Yun,Li Yan
In this paper, the polymerization of acrolein (A) via UV-mediated atom transfer radical polymerization (ATRP) is reported. The optimization of the experimental conditions of the polymerization is investigated, and it shows that dimethyl sulfoxide as solvent, ethyl 2-bromoisobutyrate (EBIB) and fluorescein (FL) as catalyst, and [A] 0 /[EBIB] 0 /[FL] 0 = 200/1/0.1 in the period of 5 h at 47 °C are suitable conditions for the reaction. In this way, the yield of the polymer is 24.5%. The glass transition temperature and melting point of polyacrolein characterized by differential scanning calorimetry are 115.5 °C and 165.7 °C, respectively. At low conversion, the polymerization conforms to be the first-order kinetics reaction. The dependence of polymerization on light source is proved by “on/off” light source experiment. In short, this study opens up a new way for the ATRP of acrolein, and the polyacrolein with abundant aldehyde groups can be used in the fields of biomedical labeling, immobilization carrier and adsorption of organic amines. Graphic abstract
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2025
·
IF 3.8
Wu Huaxin,Huang Ting,Zhang Wei,Yao Huan,Li Xueyao,Su Ping,Yang Yi
In the biomedical and chemical fields, purity assessment of compounds is a critical step in ensuring product quality and safety. In this study, a method for purity quantification was proposed as two-signal suppression–internal standard correction–high-performance liquid chromatography–quantitative nuclear magnetic resonance (TSS-ISC-HPLC-qNMR). The two-signal suppression effectively suppresses the interference of solvent signals in the NMR spectra, and the internal standard correction eliminates the influence of many variables during sample preparation and analysis. The purity result (99.89%) of the quantification of certified reference material of acesulfame (AF) by this method matched with the certified value (99.88%), which verified the accuracy of the method. The purity result (with standard deviation) of 94.42% ± 0.10% for the quantification of the low-purity drug digitoxin by the method matched with the purity result of 94.42% ± 0.11% by qNMR with deconvolution (as a validated method), which proved that the method could be used for the quantification of low-purity compounds. The methodology achieved a substantial reduction in total analysis time, from 28 to 4 h (considering only the routine analysis time after optimization), in contrast to the ISC-HPLC-qNMR approach. Additionally, it effectively decreased bias to undetectable with a standard deviation of 0.10%, while the bias of the TSS-HPLC-qNMR method was 0.93%. The present method ensures the accuracy of the quantitative results while demonstrating a low economic burden and significant time efficiency, which shows great potential for application in the accurate quantitative analysis of low-purity organic compounds. Graphical
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Food Analytical Methods
·
2024
·
IF 2.6
Pan Xingyu,Chen Jinzi,Guo Tao,Kuang Fengjiao,Kang Zonghua,Luo Jianguang
Betel nut (Areca nut, AN) products are extensively consumed across East and South Asian countries, with Binglang being the predominant chewable AN product in China. Given the increased risk of carcinogenicity associated with alkaloid nitrogen oxides compared to the primary alkaloids in AN, this study aimed to establish a precise and sensitive method for quantitative analysis of the arecoline N-oxide (ACNO) and arecaidine N-oxide (ADNO) at three different processing stages of Binglang using liquid chromatography-tandem mass spectrometry (LC–MS/MS). The developed method underwent comprehensive validation, evaluating key analytical parameters including selectivity, linearity, sensitivity, accuracy, precision, and stability. Notably, the method demonstrated excellent sensitivity, with the limits of detection (LOD) ranging from 0.029 to 0.135 ng/mL, while the limits of quantification (LOQ) ranging from 0.095 to 0.450 ng/mL. Subsequently, the established analytical technique was applied to analyze 15 Binglang samples at three different processing stages, providing the first evidence of the content and variability of alkaloid nitrogen oxides throughout these stages. ACNO and ADNO were detected in all samples, and their total contents ranged from 4.31 to 32.82 μg/g. The changes observed across different processing stages indicated that the roasting process at 80 ℃ resulted in the promotion of alkaloid nitrogen oxides. This analytical approach constitutes a valuable tool for the quality control and risk assessment of Binglang and can be extended to other AN products, thereby assisting in addressing health concerns associated with these products.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-9
·
IF 5.3
Zhang Yue,Yu Wei,Zhang Wei,Lai Jinyu,Liu Lin,Wang Wei,Wang Xinghua
Abstract Ratiometric fluorescence and colorimetric strategies for detecting activity of butyrylcholinesterase (BChE) in human serum were developed by using g-C 3 N 4 nanosheets, silver ion (Ag + ) and o-phenylenediamine (OPD) as chromogenic agents. The oxidation-reduction reaction of OPD and Ag + generates 2,3-diaminophenazine (oxOPD). Under exciation at 370 nm, g-C 3 N 4 nanosheets and oxOPD emit fluorescence at 440 nm ( F 440 ) and 560 nm ( F 560 ), respectively. Additionally, oxOPD exhibits quenching ability towards g-C 3 N 4 nanosheets via photoinduced electron transfer (PET) process. Thiocholine (TCh), as a product of BChE-catalyzed hydrolysis reaction of butylthiocholine iodide (BTCh), can coordinate with Ag + intensively, and consequently diminish the amount of free Ag + in the testing system. Less amount of free Ag + leads to less production of oxOPD, resulting in less fluorescence quenching towards g-C 3 N 4 nanosheets as well as less fluorescence emission of oxOPD. Therefore, by using g-C 3 N 4 nanosheets and oxOPD as fluorescence indicators, the intensity ratio of their fluorescence ( F 440 /F 560 ) was calculated and employed to evaluate the activity of BChE. Similarly, the color variation of oxOPD indicated by the absorbance at 420 nm ( ΔA 420 ) was monitored for the same purpose. These strategies were validated to be sensitive and selective for detecting BChE activity in human serum, with limits of detection (LODs) of 0.1 U L −1 for ratiometric fluorescence mode and 0.7 U L −1 for colorimetric mode. Graphical abstract
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Ma Peiyu,Xue Jiawei,Li Ji,Cao Heng,Wang Ruyang,Zuo Ming,Zhang Zhirong,Bao Jun
Heterogeneous single-atom systems demonstrate potential to break performance limitations of single-atom catalysts through synergy interactions. The synergy in heterogeneous single atoms strongly dependes on their anchoring sites. Herein, we reveal the site-specific synergy in heterogeneous single atoms for oxygen evolution. The Ru T Ir V /CoOOH is fabricated by anchoring Ru single atoms onto three-fold facial center cubic hollow sites and Ir single atoms onto oxygen vacancy sites on CoOOH. Moreover, Ir T Ru V /CoOOH is also prepared by switching the anchoring sites of single atoms. Electrochemical measurements demonstrate the Ru T Ir V /CoOOH exhibits enhanced OER performance compared to Ir T Ru V /CoOOH. In-situ spectroscopic and mechanistic studies indicate that Ru single atoms at three-fold facial center cubic hollow sites serve as adsorption sites for key reaction intermediates, while Ir single atoms at oxygen vacancy sites stabilize the *OOH intermediates via hydrogen bonding interactions. This work discloses the correlation between the synergy in heterogeneous single atoms and their anchoring sites.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 28
·1-10
·
IF 2.8
Si Weibin,Zhang Zhihua,Wang Yizhao,Shao Meiyang,Wei Jie
Mn–Zn ferrite (Mn 0.6 Zn 0.4 Fe 2 O 4 ) nanoparticles were synthesized using a modified sol–gel method at lower annealing temperature (minimum to 300 ℃). The experimental results and analysis indicate that these nanoparticles exhibit excellent soft magnetic properties with the ultra-high saturation magnetization ( Ms ) up to 45.1 emu/g, demonstrating the significant potential applications for biomedical industry, electronic devices, and wastewater decontamination, etc. More interestingly, Mn 0.6 Zn 0.4 Fe 2 O 4 nanoparticles exhibit unique size-dependent magnetic property, where the saturation magnetization ( Ms ) decreases with the decreasing crystalline size. Furthermore, there exists a linear proportional relationship between Ms and the reciprocal of the crystalline size (1/ D ). A novel theoretical model is subsequently proposed in the paper to elucidate the size-dependent magnetic property. Such magnetic nanoparticles composed of small-sized nanocrystalline can be analogized to a “core–shell” structure, in which the surface or interfacial state increases rapidly in proportion to the overall system. The magnetic moments are irregularly arranged in the “shell” that consists of abundant surface or interfacial states, so-called ‘magnetic disorder shell’. On the contrary, the ferrite “core” is a ferrimagnetically ordered region with a regular arrangement of magnetic moments, which is called as ‘magnetic order core’. With the decrease of crystalline size, the proportion of the ‘magnetic disorder shell’ increases. As a result, the magnetic property of the whole ferrite nanoparticle is weakened. It is believed that the present works contribute to the advancement of comprehending the correlation between the structure and property in magnetic nanoparticles.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Wang Chenlu,Zhou Liping,Liu Chengzhe,Qiao Jiaming,Han Xinrui,Wang Luyang,Liu Yaxi,Xu Bi,Qiu Qinfang,Zhang Zizhuo,Wang Jiale,Zhou Xiaoya,Zeng Mengqi,Yu Lilei,Fu Lei
Autonomic nervous system disorders play a pivotal role in the pathophysiology of cardiovascular diseases. Regulating it is essential for preventing and treating acute ventricular arrhythmias (VAs). Photothermal neuromodulation is a nonimplanted technique, but the response temperature ranges of transient receptor potential vanilloid 1 (TRPV1) and TWIK-related K + Channel 1 (TREK1) exhibit differences while being closely aligned, and the acute nature of VAs require that it must be rapid and precise. However, the low photothermal conversion efficiency (PCE) still poses limitations in achieving rapid and precise treatment. Here, we achieve a nearly perfect blackbody absorption and a high PCE in the second near infrared (NIR-II) window (73.7% at 1064 nm) via a Pt nanoparticle shell (PtNP-shell). By precisely manipulating the photothermal effect, we successfully achieve rapid and precise multimodal neuromodulation encompassing neural activation (41.0–42.9 °C) and inhibition (45.0–46.9 °C) in a male canine model. The NIR-II photothermal modulation additionally achieves multimodal reversible autonomic modulation and confers protection against acute VAs associated with myocardial ischemia and reperfusion injury in interventional therapy.
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Electrocatalysis
·
2024
·Vol. 15
·期 4
·281-290
·
IF 2.7
Xiang Qun,Wang Yizhong,Wang Shuang,Fu Xucheng,Gao Guiqi,Yan Ruiwen
In this work, the CeO 2 nanoparticles were dispersed onto the surface of graphene oxide (GO), followed by electrodeposition of Pt–Pd alloy nanoparticles on the CeO 2 surface to fabricate Pt–Pd@CeO 2 /graphene oxide composites (Pt–Pd@CeO 2 /GO). Morphological investigation was conducted using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results of morphological characterization revealed that CeO 2 nanoparticles acted as cores, while Pt–Pd alloy nanoparticles formed shells. The electrocatalytic oxidation performance of Pt–Pd@CeO 2 /GO composites for methanol electro-oxidation reaction (MOR) was systematically investigated. The mass activity for MOR on Pt 1 Pd 1.3 @CeO 2 /GO electrocatalyst was 1128 mA·mg Pt+Pd −1 , which was 5.0-fold higher than that of Pt/C catalysts. The synergistic effect between Pt and Pd, along with the active oxygen-containing species of CeO 2 effectively enhanced catalytic activity. This work presents a novel approach to developing catalysts with high catalytic performance for MOR. Graphical Abstract
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Journal of Ovarian Research
·
2024
·Vol. 17
·期 1
·1-16
·
IF 3.8
Wang Shiwei,Wu Xuan,Yang Juan,Peng Yuwan,Miao Fulu,Li Min,Zeng Juan
Background Sterigmatocystin (STE) is a mycotoxin widely found in contaminated food and foodstuffs, and excessive long-term exposure to STE is associated with several health issues, including infertility. However, there is little information available regarding the effects of STE toxin on the female reproductive system, particularly concerning oocyte maturation.Methods In the present study, we investigated the toxic effects of STE on mouse oocyte maturation. We also used Western blot, immunofluorescence, and image quantification analyses to assess the impact of STE exposure on the oocyte maturation progression, mitochondrial distribution, oxidative stress, DNA damages, oocyte ferroptosis and asymmetric division defects.Results Our results revealed that STE exposure disrupted mouse oocyte maturation progression. When we examined the cellular changes following 100 µM STE treatment, we found that STE adversely affected polar body extrusion and induced asymmetric division defects in oocytes. RNA-sequencing data showed that STE exposure affects the expression of several pathway-correlated genes during oocyte meiosis in mice, suggesting its toxicity to oocytes. Based on the RNA-seq data, we showed that STE exposure induced oxidative stress and caused DNA damage in oocytes. Besides, ferroptosis and α-tubulin acetylation were also found in STE-exposed oocytes. Moreover, we determined that STE exposure resulted in reduced RAF1 protein expression in mouse oocytes, and inhibition of RAF1 activity also causes defects in asymmetric division of mouse oocytes.Conclusion sCollectively, our research provides novel insights into the molecular mechanisms whereby STE contributes to abnormal meiosis.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2025
·
IF 3.2
Huang Yi,Zhao Chenyang,Li Yue,Wang Chen,Yuan Wenlin,Cheng Di,Shen Tao,Zhang Ji,Liu Jie,Shen Qianhong,Yang Hui
The design of hollow porous organosilica nanocontainers (HPON) loaded with corrosion inhibitors offers innovative strategies to enhance the anticorrosive capabilities of sol-gel-derived anticorrosion coatings. In this study, intelligent pH-responsive nanocontainers, termed MBT@HPON, were fabricated using a selective silica etching method, followed by the encapsulation of 2-mercaptobenzothiazole (MBT) through π-π stacking interactions with the organosilica framework. The release kinetics of MBT from the nanocontainers demonstrated that acidic environments reduced the π-π stacking interaction, thereby imparting an acid-responsive release characteristic to the nanocontainers. The total release of MBT reached 69.6% within 24 h at pH = 3, compared to only 14.6% at pH = 7. These nanocontainers were embedded into a silica nanoparticle/methyltrimethoxysilane composite sol-gel coating, creating an intelligent coating system with active and enhanced corrosion protection on 1060 aluminum alloy. Electrochemical impedance spectroscopy analysis indicated that a 0.5 wt% doping content of MBT@HPON exhibited significantly improved electrochemical impedance for the sol-gel coating, with |Z | f=0.01Hz exceeding 4 × 10 7 Ω·cm 2 after 28 d of 3.5 wt% NaCl solution immersion, significantly higher than the pure composite coating. This superior anticorrosive performance can be attributed to the outstanding compatibility between the organosilica shell and the MTMS/silica-based sol-gel coating, along with the active corrosion inhibition from the release of MBT. This work offers valuable insights into the simple construction of sol-gel coatings with enhanced corrosion resistance based on hollow porous organosilica nanocontainers. Graphical
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CELLULOSE
·
2024
·Vol. 31
·期 18
·10995-11013
·
IF 4.9
Wu You,Liu Junhui,Hu Zhengchuan,Zhou Weibo,Wu Wei,Wang Jieqiong,Ao Yuhui,Li Ming
Wearable strain sensors are gaining popularity in the field of intelligent electronic devices due to their compactness and mobility. In this study, we presented a wearable, pliable piezoresistive sensor derived from a wooden sponge integrated with the conductive polymer PEDOT. The conductive network of PEDOT: PSS underwent modulation through the incorporation of a cross-linking agent, namely, γ - glycidoxypropyltrimethoxysilane (GOPS), aimed at enhancing the sensor's sensitivity. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) confirmed that GOPS cross-linked with PEDOT: PSS. Crosslinking induced by GOPS helped PEDOT to form an ideal-network microstructure, thereby improving the sensitivity. Benefitting from this micro-network structure, the wood sponge/PEDOT:PSS/GOPS (WPG) exhibited a high sensitivity of 5.69 kPa −1 and a fast response time of 111 ms, with exceptional stability and durability (over 500 cycles), making it suitable for detecting subtle muscle changes. Crosslinking induced by GOPS induced PEDOT to form an ideal-network microstructure, thereby improving the sensitivity. The micro-network structure presented a novel approach for designing piezoresistive sensors.
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