JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 20
·1-15
·
IF 2.8
Xie Zhuojia,Jiang Xinyu,Zhang Weijian,Zou Zhengguang
With the development of the current times, the demand for refrigeration is in every aspect. Nevertheless, the necessity for new refrigeration materials is immediate because of the greenhouse effect and the destruction of the atmosphere. Therefore, perovskite materials have been investigated. La 0.8− x Eu x Ca 0.1 Sr 0.1 MnO 3 (LECSMO) ( x = 0.05, 0.10, 0.15) powder samples were prepared using the sol–gel method (S–G). The structure, magnetocaloric effect, and magnetic of LECSMO have been explored. X-ray diffraction (XRD) indicates that all samples belong to the rhombohedral perovskite structure of the Pbnm space group. The magnetic research of LECSMO revealed that the samples doped with Eu 3+ exhibited a ferromagnetic (FM) to paramagnetic (PM) transition around the Curie temperature (Tc). As the amount of Eu 3+ doping is added, Tc decreased from 264 to 194 K. Normalization and Banerjee’s criterion confirmed the second-order phase transition of the LECSMO near Tc. The maximum magnetic entropy change ( \(-\varDelta {S}_{M}^{max}\) ) for LECSMO ( x = 0.05, 0.10, 0.15) is 5.39, 4.52, and 4.35 J/(kg·K) when the applied magnetic field (H) = 5 T, respectively. Further, the relative cooling power (RCP) of LECSMO is 282.20 J·kg − 1 , 305.20 J·kg − 1 , and 323.15 J·kg − 1 , respectively.
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MICROCHIMICA ACTA
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2023
·Vol. 190
·期 8
·1-9
·
IF 5.7
Zhao Yijian,Zheng Weilian,Liao Mengyu,Zhou Shuai,He Weiheng,Liu Ming,Yao Zhiyi
A cationic perylene probe was designed and synthesized for sensitive determination of tartrazine. In the presence of tartrazine, the fluorescence of the perylene probe was quenched by efficient supramolecular self-assembly of the perylene derivate. The quenching is caused by the synergistic effect of noncovalent interactions including static electricity, π-π stacking, and hydrophobic interaction. Benefiting from these advantages, the probe exhibited excellent sensing performance to tartrazine within 2 min. The detection and quantification limit of tartrazine are as low as 2.42 and 8.07 nmol L −1 , respectively, with a wide linear operation range from 15 to 500 nmol L −1 . Most importantly, due to the high binding affinity (3.22 × 10 7 mol L −1 ) between the perylene probe and tartrazine, the sensing system shows great anti-interference capacity. Subsequently, the visualization application of the approach was evaluated by portable device, and the limits of detection for visual detection for test strip, membrane, and hydrogel were 0.5, 0.5, and 5 μmol L −1 , respectively. The approach has been applied to monitor tartrazine in various food condiments with recoveries in the range 91.29–108.83%. As far as we know, this is the first report of using perylene-based probe for tartrazine determination, offering a promising strategy for the construction of perylene-based detection system in the field of food safety. Graphical Abstract
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Wang Dan,Chen Zhaomin,Li Mingtong,Hou Zhen,Zhan Changsong,Zheng Qijun,Wang Dalei,Wang Xin,Cheng Mengjiao,Hu Wenqi,Dong Bin,Shi Feng,Sitti Metin
Light-driven actuators have great potential in different types of applications. However, it is still challenging to apply them in flying devices owing to their slow response, small deflection and force output and low frequency response. Herein, inspired by the structure of vine maple seeds, we report a helicopter-like rotary flying photoactuator (in response to 0.6 W/cm 2 near-infrared (NIR) light) with ultrafast rotation (~7200 revolutions per minute) and rapid response (~650 ms). This photoactuator is operated based on a fundamentally different mechanism that depends on the synergistic interactions between the photothermal graphene and the hygroscopic agar/silk fibroin components, the subsequent aerodynamically favorable airscrew formation, the jet propulsion, and the aerodynamics-based flying. The soft helicopter-like photoactuator exhibits controlled flight and steering behaviors, making it promising for applications in soft robotics and other miniature devices.
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IRANIAN POLYMER JOURNAL
·
2023
·Vol. 32
·期 10
·1307-1319
·
IF 3.1
Li Qinsheng,Li Yupeng,Li Yaru,Huang Qinghua,Hu Zhongyu,Yang Yuping,Xiong Zhenhua,Cheng Chuanjie
It is urgent and important to design and prepare functional polymers utilizing biomass or bio-based platform chemicals due to fossil resource/energy crisis. We designed and synthesized two linear polymers LP 1 and LP 2 from bio-based platform chemical furfural as well as other biomass-derived feedstock adipic acid and 1,6-hexadiamine using efficient and 100% atom-economy Passerini three-component reaction. The number-average molecular weights of LP 1 and LP 2 are 2189 da and 5464 da, respectively. The products LP 1 and LP 2 were crosslinked with N,N ´-4,4´-diphenylmethyene bismaleimide (BMI) through Diels–Alder cycloaddition reactions to form the corresponding polymer networks CP 1 and CP 2 , respectively. Both CP 1 and CP 2 showed good chemical resistance to acid and ethyl acetate, but relatively poor resistance toward base and THF. Gel fraction values of CP 1 and CP 2 were 82% and 74%, respectively, indicating that most of the linear segments of LP 1 and/or LP 2 were crosslinked after Diels–Alder reactions. Thermal property analysis indicated that the two polymer networks were at rubbery state as their T g values were 14.78 and 7.00 °C, respectively. Td 10 values of CP 1 and CP 2 were 151 °C and 131 °C, respectively. The presence of dynamic D–A bonds caused both CP 1 and CP 2 to exhibit intrinsic self-healable performance at 60 °C or higher. Furthermore, CP 2 also showed rapid self-healing behavior (within 3 min) under UV (360 nm) irradiation due to the existence of dynamic disulfide bonds in the main chain. Graphical abstract
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JOURNAL OF NANOPARTICLE RESEARCH
·
2023
·Vol. 25
·期 7
·1-15
·
IF 2.5
Fan Mingxuan,Tang Lingqian,Wang Yihan,Feng Lu,Zhou Hong
In this work, thiol-functionalized silica SiO 2 -Pr-SH (Pr = −(CH 2 ) 3 ) was synthesized by self-hydrolysis of 3-mercaptopropyltrimethoxysilane (MPTMS) with the average particle sizes up to 1.9 μm. Then sulfonic acid-functionalized SiO 2 -PrSPr-SO 3 H was prepared by the 1,3-Propanesultone grafted onto SiO 2 -Pr-SH and used as solid acid catalysts for alcoholysis of total saponins in Dioscorea zingiberensis C. H. Wright (DZW) to the production of diosgenin. The as-prepared solid acid was fully characterized with FT-IR, Raman, TGA, BET, FESEM, EDS, elemental mapping, XPS, and XRD, respectively. The solid acid quantity, solvent dosage, extraction temperature, and time were studied by single-factor experiments. The maximum yield of diosgenin was calculated to be 16.73% relative to 0.1 g total saponins, which was higher than the sulfuric acid hydrolysis method. Importantly, it is an efficient alcoholysis approach for the production of diosgenin from total saponins and the prepared solid acid can be recycled in the reaction medium. The possible alcoholysis products and reaction mechanism were proposed on the basis of LC-MS results. This work not only provides a new solid acid for the production of diosgenin from DZW but also gives a beneficial synthetic reference for the preparation of high-activity SO 3 H-functionalized catalysts based on the organosilane. Graphical abstract SO 3 H-functionalized silica as an efficient solid acid catalyst for the production of diosgenin from Dioscorea zingiberensis C. H. Wright
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Plant Methods
·
2023
·Vol. 19
·期 1
·1-17
·
IF 5.1
Jiang Zheng,Zhou Peina,Shao Yongfang,Zhang Qianqian,Yue Wei,Qu Cheng,Wu Qinan
Background Glandular trichomes, often referred to as “phytochemical factories”, plays a crucial role in plant growth and metabolism. As the site for secretion and storage, the development of glandular trichomes is related to the dynamic biosynthesis of specialised metabolites. The study aims to explore the relationship between spatial phenotype and dynamic metabolism of glandular trichomes, and establish a novel approach for the exploration and study of the regulatory mechanism governing the development of glandular trichomes. Results In this study, we proposed a technical route based on the relative deviation value to distinguish the peltate glandular trichomes (PGTs) from the background tissues and extract their spatial phenotype. By defining glandular trichome developmental stages based on the leaf vein growth axis, we found that young PGTs were densely distributed near the proximal end of growth axis of the leaf veins, where perillaketone, a primary metabolite of PGTs, is predominantly accumulated. Conversely, mature PGTs are typically found near the distal end of the mid-vein growth axis and the lateral end of the secondary vein growth axis, where the accumulation rate of isoegomaketone and egomaketone exceeds that of perillaketone in PGTs. We further identified spatial phenotypic parameters, L sum and d, as independent variables to construct a linear regression model that illustrates the relationship between the spatial phenotypes and metabolite content of PGTs, including perillaketone (R 2 = 0.698), egomaketone (R 2 = 0.593), isoegomaketone (R 2 = 0.662) and the sum of the amount (R 2 = 0.773). Conclusions This model proved that the development of PGTs was correlated with the growth of the entire leaf, and the development stage of PGTs can be identifined by spatial phenotypes based on the leaf veins. In conclusion, the findings of this study enhance our understanding of correlation between spatial phenotype and development of glandular trichomes and offer a new approach to explore and study the regulatory mechanism of glandular trichome development.
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 31
·12596-12610
·
IF 4.5
Liu Jun,Wang Hui,Chang Meng-Jie,Li Wen-Juan,Bai Ge,Xie Heng-Xue,Li Xin,Du Hui-Ling,Song Shi-Jie
MIL-100(Fe) has been demonstrated as a commonly used photocatalyst but is limited by the deficient charge separation efficiency and difficult recovery. In this work, by taking advantages of the strong plasmonic absorption and electron conductivity of Ag nanoparticles, as well as the fast magnetic response of the Fe 3 O 4 , core/shell Ag/Fe 3 O 4 @MIL-100(Fe) (AFM) was facilely prepared by a direct hydrothermal reaction between H 3 btc and Ag/Fe 3 O 4 (AF) for photo-Fenton degradation of RhB assisted by H 2 O 2 . Specifically, the Fe 3 O 4 in AF acted as both ion precursor and protector to inhibit Ag aggregation to obtain uniform and dispersed core/shell AFM. By adjusting the MIL-100(Fe) thickness and the Ag proportion, the optimum AFM exhibits superior photo-Fenton activity to decompose 88.5% RhB within 30 min under visible-light irradiation and H 2 O 2 addition, which is much higher than that of AFM in the presence of either light (58.5%) or H 2 O 2 (46.6%) due to the synergistic effects of visible-light absorption by MIL-100(Fe) and ·OH generation from H 2 O 2 . Moreover, the catalyst can be collected conveniently for its strong magnetic responsibility. This work may be beneficial to the development of effective photo-Fenton catalysts. Graphical abstract A novel magnetically recyclable Ag/Fe 3 O 4 @MIL-100(Fe) with special core/shell structure was facilely synthesized by hydrothermal method with superior photo-Fenton activity for dye degradation.
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BMC Chemistry
·
2023
·Vol. 17
·期 1
·1-10
·
IF 4.6
Xu Daokun,Huang Haolun,Hu Wenyan,Liu Xinmei,Yang Jun
A liquid chromatography–tandem mass spectrometry (LC–MS/MS) method was developed for the analysis of ribavirin in chicken. Samples was extracted with 0.1% formic acid and purified by Hypercarb cartridge prior to LC–MS/MS analysis. The eluates were evaporated to dryness, reconstituted in 1 mL 5mM ammonium acetate containing 5% acetonitrile (v/v) and 0.1% (v/v) formic acid. Chromatographic separation was performed on a Hypercarb analytical column under a gradient elution program with acetonitrile and 0.1% (v/v) formic acid in 5 mM ammonium acetate at a flow rate of 0.6 ml/min. The intraday and interday accuracy ranged from − 7.83 − 1.39%, and − 6.38 − 2.25%, with precisions between 1.34 − 3.88%% and 1.10 − 4.67%. The limits of detection (LODs) and limits of quantitation (LOQs) of ribavirin was 0.1 ng/mL and 0.5 ng/mL, respectively. The method was validated for linearity, accuracy, precision, matrix effect and stability. Application of the method confirmed 3 ribavirin positive samples out of 50 commercial chicken samples, with concentrations of ribavirin ranging from 0.9 μg/kg to 5.8 μg/kg a, respectively. Additionally, both AB Sciex 5500 and Agilent 6945B were proven to be suitable in ribavirin separation and quantification. The described method is suitable for the determination of ribavirin in chicken in analytical practice to monitor illegal addition of this kind of anti–viral drug.
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 8
·1-12
·
IF 2.8
Xiong Qiaoqiao,Yang Shuai,Peng Chengjun,Xie Fengli,Gu Zhuowei,Fu Yawen,Tan Haoyun,Dai QiQi,Yi Wenjun,Li Lijun,Liu Kun
Styrene/1,3-diene copolymers are widely used in rubber tires, adhesives, waterproof materials, automotive parts and others. However, their oil resistance, compatibility with polar materials, and poor adhesion limit their applications. Polarization modification strategy can further expand the application field of such materials. In this paper, a series of strictly alternating copolymers were synthesized in cyclohexane via living and controlled anionic alternating copolymerization of styrene derivatives (including styrene (ST), p -methylstyrene (MST), p -tert-butylstyrene (TBS), and 1,1-diphenylethylene (DPE)) with 1,3-pentadiene (PD) using n -BuLi initiator. The above-mentioned alternating copolymers were epoxidized in cycloamyl methyl ether (CPME, green solvent) using m -Chloroperoxybenzoic acid ( m -CPBA) as the oxygen source. The 1 H NMR and FTIR results showed that the degree of epoxidation ( DE ) of the alternating copolymers was controllable and the cross-linking gels can be avoided (determined by solubility experiment), and the DE of nearly 100% could be achieved by optimizing processes. As for these PD-based alternating copolymers, the type of substituents on rigid benzene rings has a certain impact on the epoxidation rate as well as the DE . DSC results showed that not only the high steric hindrance groups in polymer side chains but also the epoxidation strategy can greatly improve the heat resistance of the product.
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Nano Research
·
2023
·
IF 9.9
Wang Daji,Wang Jie,Liu Dan,He Jiuyang,Wang Meiying,Huang Haibing,Nie Guohui,Ding Hui,Yan Xiyun
The correlation between Epstein-Barr virus (EBV) infection and nasopharyngeal carcinoma (NPC) risk has been extensively researched. The continual monitoring of EBV-IgAs provides a promising approach of NPC screening in its early stage. In this study, we successfully synthesized a single-atom nanozyme (SANzyme) through the application of iron-porphyrin based metal organic framework (MOF-FeP). The MOF-FeP possesses precisely-defined electronic and geometric structures that accurately mimic highly-evolved catalytic site of natural peroxidase. The peroxidase-like activity of MOF-FeP enables it to catalyze the chemiluminescence of luminol substrate. By integrating MOF-FeP into a traditional strip, we created a rapid and highly-sensitive evaluation tool for detecting EBV-IgAs. Importantly, the MOF-FeP strip enables the simultaneous detection of three EBV-IgAs, greatly improving the accuracy of EBV-associated NPC screening. The sensitivities of the MOF-FeP strip (75.56%–93.30%) surpass those of current enzyme-linked immunosorbent assay (ELISA) methods (64.44%–82.22%). This test takes only 16 min to perform as opposed to the customary 1–2 h required for standard ELISA. Additionally, the MOF-FeP strip is suitable for whole blood samples, thereby significantly simplifying the sample preparation and detection process. In conclusion, the MOF-FeP strip combines the simplicity of traditional strip with the high catalytic activity of SANzyme. Our innovative MOF-FeP strip offers a new point-of-care strategy for EBV-IgAs detection, which is expected to markedly facilitate early screening for EBV-associated diseases.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·
IF 4.3
He Zhen-Hang,Liu Guang-Feng,Zhou Ze-Kun,Liu Zhen,Zeng Yi-Shu,Zhang Peng
Poly(3,4-ethylenedioxythiophene) (PEDOT) is one of the most successful conductive polymers that recently has been used in wearable sensors for human health monitoring. In this work, we prepared a series of PEDOT hybrids consisting of PEDOT, sodium poly(styrene sulfonate) (PSSNa) and polyethylene oxide (PEO), and their preparation could be scaled-up via an adapted solid-state polymerization process. The resistance of the as-prepared PEDOT:PSS/PEO hybrid shows clear temperature response, i.e. , it decreases almost linearly with the temperature increase. To understand this phenomenon, the in situ synchrotron radiation wide- and small-angle X-ray scattering (WAXS/SAXS) characterizations were undertaken to study the temperature-dependent microstructure change of the PEDOT:PSS/PEO hybrid. It demonstrated that PEDOT formed conductive paths in the hybrids, which were not destroyed by the PEO crystallization. As temperature increased, the PEO crystals’ melting and the accompanying reorganization of PEDOT chains endowed the hybrid sample temperature responsiveness. Based on these fundamental knowledges, the hybrid materials were used to fabricate flexible wearable sensor that showing temperature sensing performance with an accuracy of 1 °C. These findings shed lights on the scalable manufacturing of wearable sensors for body temperature monitoring.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Zhong Dengjie,Liu Peng,Liu Yi,Xu Yunlan
The Zn/Fe@N-doped porous graphitic carbon catalyst (Zn/Fe@PCN) was successfully produced through one-step pyrolysis of g-C 3 N 4 and Zn/Fe-MOF and was used for the activation of persulfate (PS) for the degradation of RhB. The Zn/Fe@PCN/PS system was able to degrade 95.92% of RhB in 30 min at a rate of 0.6453 min −1 when RhB was concentrated at 50 mg L −1 . The efficient degradation of RhB is primarily realized through the synergistic activation of PS by Zn, Fe, and N to produce reactive oxygen species 1 O 2 , \(\cdot{\mathrm{O}}_2^-\) , \(\cdot \mathrm{SO}_4^-\) , and ·OH. Zn 0 /Fe 0 in Zn/Fe@PCN forms a galvanic cell with carbon to release electrons to join in the activation of PS. The doping of Zn not only provides sufficient electrons for the activation of PS but also promotes the effective reduction of Fe 2+ and thus the Fe 2+ /Fe 3+ cycle. The N doping accelerates the electron transfer during the reaction progress.
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危险品化学品经营许可证（带存储）