JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 13
·6943-6952
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IF 4.682
Zhang Yongjun,Zhao Xiaoyu,Zhu Qi,Cheng Mingyu,Xu Wei,Wang Yaxin,Zhu Aonan,Gao Renxian,Zhang Jian,Zhang Xiaolong
As an important marker of Hepatocellular carcinoma (HCC), AFP-L3 has attracted attention. In this study, the surface-plasmon-assisted Ag nanoparticles symmetrical growth technology under magnetic field is used to fabricate the six-nanohole nanojar array containing Ag nanoparticles as the sensing substrate. The displacement of SERS signal of the optimized structure is used to detect HCC marker AFP-L3. This method has good stability, high accuracy and has great potential in the early diagnosis of HCC.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 331
·期 5
·2055-2068
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IF 1.754
Liu Wenbin,Huang Yiwei,Huang Guolin,Fan Lijiao,Xie Yuming,Shi Jeffery
Eco-friendly and low-cost composite, amidoxime-functionalized microcrystalline cellulose/mesoporous silica (MCC/MS-AO), were synthesized by co-condensation method. The obtained materials were characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and N 2 adsorption–desorption analysis. Batch experiments were carried out to study the adsorption capacity of U(VI) on MCC/MS-AO. The results show that the material has good adsorption capabilities for U(VI) including high capacity, good selectivity, and reusability. The adsorption process conforms to pseudo-second-order kinetic model and Langmuir model, and it is spontaneous and endothermic. Finally, the possible adsorption mechanism was further studied by X-ray photoelectron spectroscopy (XPS) techniques. Graphical abstract
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JOURNAL OF POLYMER RESEARCH
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2022
·Vol. 29
·期 6
·1-11
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IF 3.061
Deng Wei,Qu Kexin,Yang Meng,Li Guoan,Ren Yichen,Cui Weiwei
As the development of integrated and flexible devices, polymer-based composites with simultaneously improved thermal conductivity, breakdown strength and mechanical properties have become urgent demands. In this study, tetrabutylammonium bromide modified graphene oxide (TGO) is utilized to fabricate the electrospun TGO/polyimide fiber membranes (E-TGO/PI), and then impregnated in polyamic acid (PAA) glue and performed thermal imidization to obtain the impregnated TGO/PI composite films (I-TGO/PI). The thermal conductivity almost linearly increases with the increasing of TGO content, and the 1wt%I-TGO/PI composite materials achieve a thermal conductivity of 0.499 W/mK and a breakdown strength of 124 kV/mm, with 16% and 311% enhancement compared to the corresponding 1wt%E-TGO/PI without impregnation. Meanwhile, the tensile strength and elongation at break of 1wt%I-TGO/PI increase by over 4 times than the pristine E-PI. Besides, the dielectric permittivity and dielectric loss of I-TGO/PI composite materials maintain at relatively low value throughout. The present work demonstrates that the combination of electrospinning and impregnation is an efficient strategy to improve the comprehensive properties of polymer composites for thermal management applications.
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POLYMER BULLETIN
·
2022
·Vol. 80
·期 4
·4443-4458
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IF 2.843
Zheng Yunxiang,Wang Xiangpeng,Zhang Chunxiao,Zong Lina
Here, copolymerization of acrylic acid (AA) and acrylamide (AM) onto chitosan (CTS) was performed using 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (VA-044) as the initiator and tetraallylammonium bromine (TAAB) as the crosslinker. The structure of the superabsorbent was characterized via Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and atomic force microscopy. The reaction conditions were optimized by an orthogonal experiment, and the water absorbency in different solutions was investigated at 80 ℃. The optimal conditions for the preparation of P(AA-AM)/CTS were as follows: The mass ratios of AM to AA, CTS to AA, VA-044 to AA, TAAB to AA were 20, 7, 0.05, 0.18%, respectively. The superabsorbent showed excellent temperature resistance, and the swelling ratio reached 371.2 g/g in distilled water at 80 ℃. Next, the sensitivity of P(AA-AM)/CTS to various salt concentrations was measured and the results showed that P(AA-AM)/CTS was most sensitive to BaCl 2 , whereas KI had the least influence on water absorbency. Additionally, P(AA-AM)/CTS had different swelling capacities in various pH solutions. The gel showed excellent pH responsiveness; a pH reversible property was observed between pH 2 and 7 as well as pH 7 and 12.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 3
·836-849
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IF 2.936
Jiang Haoran,Xue Changhao,Sun Weijie,Gong Zhaoxiang,Yuan Xia
The esterification of cyclohexene with formic acid is the first step in synthesizing cyclohexanol via the indirect hydration of cyclohexene. In this work, we improved the efficiency of the esterification reaction by constructing a sulfonic-acid-functionalized UiO-66 solid-acid catalyst containing defect sites. By using acetic acid as the modulator, ZrCl 4 as the zirconium source, and 2-sulfoterephthalic acid monosodium salt as the ligand, a sulfonic-acid-functionalized UiO-66-SO 3 H with defect sites was prepared using a solvothermal synthesis method. Additionally, we also prepared UiO-66 with defect sites for comparison. We then investigated the regulation effects of acetic acid addition amount on the defect structures and acidity of the as-prepared materials. The results showed that the addition of acetic acid caused lattice defects in the as-prepared materials with a missing linker, and the specific surface area, pore volume, pore size, and particle size of the material changed significantly. The number of defect sites was determined by thermogravimetric analysis. Additionally, pyridine infrared spectroscopy and X-ray photoelectron spectroscopy (XPS) analysis indicated that the ratio of Lewis acid to Brønsted acid sites, and the total acid content in the defect materials, greatly increased compared to pure UiO-66 and UiO-66-SO 3 H, which greatly enhanced the acid catalytic performance of the material. Among these, UiO-66-SO 3 H(20), which was prepared by adding 20 mL of acetic acid, exhibited the best catalytic activity. The conversion rate of cyclohexene reached 83.4%, the selectivity toward cyclohexyl formate was 99.8%, and the catalyst could be reused three times. Graphical Abstract The purpose of this work was to improve the efficiency of the esterification reaction of cyclohexene with formic acid by constructing a sulfonic acid-functionalized UiO-66 solid acid catalyst containing defective sites. The regulation effect due to the amount of acetic acid added on the defect structure and acidity of the as-prepared materials was investigated.
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Acta Metallurgica Sinica-English Letters
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2022
·Vol. 35
·期 10
·1653-1664
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IF 3.024
Xie Shenghui,Liao Xiang,Zeng Xierong,Yang Haipeng,He Liang
High-entropy alloys (HEAs) have attracted widespread attention due to their excellent mechanical properties. However, their functional properties arising from the supersaturated solid solution state can be improved. Advanced oxidation processes (AOPs) are considered to be an effective method for decomposing organic pollutants, and HEAs are proposed as effective candidates for AOP catalysts. Currently, several HEAs used for organic pollutant degradation are prepared through mechanical alloying. In this work, FeAlCoNi and FeAlCoNiB Fenton-like catalysts were prepared by single roll melt spinning and subsequent ball milling techniques. We found that the FeAlCoNiB HEA exhibits highly efficient degradation for p -nitrophenol ( p -NP). The degradation efficiency of FeAlCoNiB is 120 times higher than that of FeAlCoNi, which confirms that boron functions effectively during the degradation process. FeAlCoNiB has a better degradation efficiency than pure iron powder and a degradation efficiency comparable to that of the amorphous Fe 78 Si 11 B 11 alloy. Additionally, the degradation efficiency of FeAlCoNiB X increases ( k values from 0.13 to 0.55 min −1 ) when the boron content increases from an X value of 0.25 to 1.25. We speculate that Fe 2 B favors the degradation process and promotes zero-valent iron to decompose organic pollutants through a galvanic cell effect. Possible p -NP degradation pathways are proposed after LC–MS analysis. This study provides a new series of HEA Fenton-like catalysts, which have the potential to be prepared into bulk devices for industrial applications.
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Reaction Kinetics Mechanisms and Catalysis
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2022
·Vol. 135
·期 4
·1957-1970
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IF 1.843
Wang Chengqian,Zhao Caiyi,Zhang Long
To enhance the selective fructose dehydration to 5-hydroxymethylfurfural (HMF), an efficient dehydration of fructose to 5-HMF in H 2 O-MIBK- pressured CO 2 in 20 min at 200 °C with a better product yield of 85.6% and 89.1% product selectivity was achieved. The high activity attributed to the combination of the weak acidity by CO 2 dissolved in the water and the efficient separation of fructose with 5-HMF in this H 2 O-MIBK two-phase system. The possible reaction mechanism is discussed. It was found that the solvents ratio was the one of key factors determining the yield of target products. Compared to the related reported results in the reaction, this process characterized of more favorable product yield and higher selectivity, it can be considered as a potential technique for the scale-up production of 5-HMF from fructose.
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MICROCHIMICA ACTA
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2022
·Vol. 189
·期 5
·1-7
·
IF 6.408
Wang Yang,Jin Daobin,Zhang Xiaoqian,Zhao Jikuan,Hun Xu
Based on the self-enhanced photoelectrochemical quality of Cu-MOF-NH 2 , a photoelectrochemical biosensor for kanamycin detection with a Cu-MOF-NH 2 modified electrode was constructed. This biosensor took full advantage of the low electron hole recombination rate due to the ligand-to-metal charge-transfer mechanism of excited electron transfer in Cu-MOF-NH 2 . The kanamycin aptamer was modified onto Cu-MOF-NH 2 by Schiff base reaction. In the presence of kanamycin, the holes on the amino group in Cu-MOF-NH 2 oxidize kanamycin, making kanamycin itself as a signal enhancement substance, and achieving the effect of self-enhancement. The dynamic monitoring range for kanamycin is 0.5 to 650 nM, and the detection limit is 0.1 nM. The sensor has been successfully applied to the determination of kanamycin in fish with recoveries of 95.7–105.0% and RSD of 1.5–4.0%. This work provides a broad path for the development of self-enhanced photoelectrochemical sensors. Graphical abstract
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PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-16
·
IF 9.429
Liu Jie,Hu Xiaochun,Feng Lei,Lin Yun,Liang Shujing,Zhu Zhounan,Shi Shuo,Dong Chunyan
Background Non-redundant properties such as hypoxia and acidosis promote tumor metabolic adaptation and limit anti-cancer therapies. The key to the adaptation of tumor cells to hypoxia is the transcriptional and stable expression of hypoxia-inducible factor-1 alpha (HIF-1α). The phosphorylation-activated tumorigenic signal PI3K/AKT/mTOR advances the production of downstream HIF-1α to adapt to tumor hypoxia. Studies have elucidated that acid favors inhibition of mTOR signal. Nonetheless, carbonic anhydrase IX (CAIX), overexpressed on membranes of hypoxia tumor cells with pH-regulatory effects, attenuates intracellular acidity, which is unfavorable for mTOR inhibition. Herein, a drug delivery nanoplatform equipped with dual PI3K/mTOR inhibitor Dactolisib (NVP-BEZ235, BEZ235) and CAIX inhibitor 4‐(2‐aminoethyl) benzene sulfonamide (ABS) was designed to mitigate hypoxic adaptation and improve breast cancer treatment. Results ABS and PEG-NH 2 were successfully modified on the surface of hollow polydopamine (HPDA), while BEZ235 and Chlorin e6 (Ce6) were effectively loaded with the interior of HPDA to form HPDA-ABS/PEG-BEZ235/Ce6 (H-APBC) nanoparticles. The release of BEZ235 from H-APBC in acid microenvironment could mitigate PI3K/mTOR signal and resist HIF-1α-dependent tumor hypoxia adaptation. More importantly, ABS modified on the surface of H-APBC could augment intracellular acids and enhances the mTOR inhibition. The nanoplatform combined with phototherapy inhibited orthotopic breast cancer growth while reducing spontaneous lung metastasis, angiogenesis, based on altering the microenvironment adapted to hypoxia and extracellular acidosis. Conclusion Taken together, compared with free BEZ235 and ABS, the nanoplatform exhibited remarkable anti-tumor efficiency, reduced hypoxia adaptation, mitigated off-tumor toxicity of BEZ235 and solved the limited bioavailability of BEZ235 caused by weak solubility. Graphical Abstract
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 48
·72545-72555
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IF 5.19
Wang Wei,Wang Shiyi,Vakili Mohammadtaghi,Wang Yan,Sun Chang,Yang Haoru,Xiao Guotao,Gong Minjuan,Zhou Shuangxi
Herein, novel composite materials were prepared by intercalating functional pillars, i.e., pentafluorobenzene (PFB) and sodium 2,3,4,5,6-pentafluorobenzoate (PFBS), into graphene oxide (GO) sheets. It led to forming size hives and increased availability of intrinsic area of GO. The synthesized materials (GO-PFB and GO-PFBS) were investigated as adsorbents to eliminate sulfadiazine (SD) from aqueous solutions. The adsorption capacities of GO-PFBS (1002.21 μmol/g) and GO-PFB (564.17 μmol/g) were 6.37 and 3.59 times higher than that of GO (157.21 μmol/g), respectively. The adsorption of SD onto GO-PFBS decreased with increasing solution pH. Density functional theory (DFT) results revealed that the SD adsorption onto the adsorbents was exothermic, and the introduction of the carboxylate groups showed lower binding energy. It was found that hydrophobic interaction fully participates in the adsorption process, and the electrostatic complementation of hydrogen bonding further enhances the SD adsorption. Obtained results showed that intercalating functional rigid molecules as pillars to support GO sheets could improve its adsorption behavior.
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JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 29
·期 4
·1253-1263
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IF 2.523
Tong Yutao,Cheng Ruihua,Dong Huan,Liu Boping
Salen-based covalent organic framework (COF), constructed by salen skeleton, has great potential applications as the heterogeneous catalyst due to its unique salen-functionalized structure and uniform porous microenvironment. In this study, the mesoporous crystalline salen-COF was facile synthesized via heating salicylaldehyde and ethylenediamine in the air and characterized by fourier transform infrared, powder X-ray diffractometer, Brunauer–Emmett–Teller, and inductively coupled plasma atomic emission spectrometer. The deliberately selected macromonomer endowed salen-COF with a large pore size (2.06 nm). After metalation with cobalt, the obtained salen-COF-Co exhibited high Co(salen) crystallinity as well as the well-retained COF structure. Under the optimized reaction conditions (0.25 mol% salen-COF-Co, 120 °C, and 2.0 MPa CO 2 ), the salen-COF-Co exhibited high reactivity and > 99% selectivity for the CO 2 cycloaddition with varieties of epoxides (12 examples) to afford multifunctional cyclic carbonates. Noting that the cyclic bis- and tris-carbonates were successfully obtained with high conversions and > 99% selectivities. Moreover, the unsubstituted trimethylene oxide and hydroxyl-functionalized substituted 3-ethyl-3-methyloloxetane were successfully converted to the corresponding six-membered cyclic carbonates with moderate conversions and > 99% selectivities. In addition, during at least five recycle tests, the robust heterogeneous salen-COF-Co exhibited excellent recyclability and reusability, maintaining high crystallinity and ordered porous structure with stable reactivity. This study provides a potential heterogeneous porous catalyst for selective CO 2 cycloaddition with epoxides and oxetanes.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 48
·72586-72597
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IF 5.19
Huang Xiaori,Chen Yiqun,Sun Dedong,Ma Hongchao,Wang Guowen,Dong Xiaoli
In this research, the treatment of methylene blue (MB) dye wastewater by a novel system that combines H 2 O 2 with an aluminum-carbon micro-electrolysis (ACE) was explored. The effects of the H 2 O 2 amount, initial pH, aluminum to carbon ratio, total aluminum-carbon mass, dye concentration, and reaction temperature on degradation of MB were investigated. The findings revealed that under the following conditions: H 2 O 2 34.0 mg/L, initial pH of 3.0, aluminum-to-carbon ratio of 2:1, total aluminum-carbon mass of 2.0 g/L, MB concentration of 20 mg/L, and 20 °C, the degradation rate of MB could reach 99.3% after 180 min, which is 18.4% more compared with ACE at the same conditions without H 2 O 2 . Through the quenching experiments, it was proved that the efficient free radicals produced during degradation are •OH and •O 2 - . Finally, a possible mechanism of H 2 O 2 enhanced aluminum carbon micro-electrolysis (HP-ACE) for MB degradation was discussed.
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