RARE METALS
·
2022
·Vol. 41
·期 7
·2405-2416
·
IF 6.318
Cui Song-Song,Liu Xuan,Shi Yin-Biao,Ding Ming-Ye,Yang Xiao-Fei
Exploring efficient co-catalysts to accurately steer the charge separation of semiconductor photocatalysts is highly desired yet remains challenging. Here, we tackle the significant challenge by in situ growing the Bi 12 O 17 Cl 2 photocatalyst onto two-dimensional (2D) Cl-terminated Ti 3 C 2 MXene to construct 2D/2D heterojunction of Bi 12 O 17 Cl 2 and Ti 3 C 2 . Firstly, 2D few-layered Ti 3 C 2 MXene with chlorine groups has been successfully synthesized by Lewis acidic etching strategy with subsequent ultrasonic exfoliation. The grafting of chlorine terminations on the surface of MXene serves as nucleating centers and growth platform, resulting in the formation of strong interfacial bonds (Bi–Cl–Ti) between Bi 12 O 17 Cl 2 and Ti 3 C 2 . These strong bonds can facilitate the separation and transfer of photo-generated charge carriers between Bi 12 O 17 Cl 2 photocatalyst and Ti 3 C 2 cocatalyst. As expected, the photocatalytic degradation rate of Bi 12 O 17 Cl 2 /Ti 3 C 2 hybrids is 9.7 times higher than that of bare Bi 12 O 17 Cl 2 nanosheets. This work not only exhibits a new design concept to effectively steer the charge separation for photocatalysis, but also gives a reference for constructing efficient MXene-based photocatalytic systems. Graphical abstract
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RARE METALS
·
2022
·Vol. 41
·期 8
·2606-2615
·
IF 6.318
Cui Hao,Liao Han-Xiao,Wang Zhi-Lu,Xie Jian-Ping,Tan Peng-Fei,Chu De-Wei,Jun Pan
The efficiency of electrochemical water splitting is extremely hampered by the sluggish oxygen evolution reaction (OER) occurred at the anode. Therefore, developing high-performance OER electrocatalysts is crucial for realizing the industrialized application of water splitting. Herein, a high-efficiency electrocatalyst of ruthenium-decorated nickel-iron hydroxide (10Ru-NiFe LDH) supported on Ni foam is successfully synthesized for OER. Modifying NiFe LDH with ruthenium can optimize the electronic density to form high valences of metal sites, which is beneficial to promote its OER performance. Consequently, the 10Ru-NiFe LDH only needs a low overpotential of 222 mV to achieve a current density of 50 mA·cm −2 , which exhibits fast OER kinetics with a small Tafel slope of 58 mV·dec −1 . Moreover, this electrocatalyst shows high stability over 20 h at a high current density of 100 mA·cm −2 without obvious decay. The decent OER performances can be ascribed to the increased active sites and the synergistic electronic interactions among Ni, Fe and Ru. This work provides an effective approach for designing desirable electrocatalysts for OER. Graphical abstract
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Food Analytical Methods
·
2022
·Vol. 15
·期 10
·2725-2733
·
IF 3.498
Sun Luping,Liu Hongyan,Chi Bingqing,Bian Yifei,Zhou Honglei,Tian Zhenhua
Quince ( Cydonia oblonga Mill.) is the one and only specie of the genus Cydonia in the Rosacea family. Quince contains bioactive constituents such as alkaloids, saccharides, flavonoids, and volatile oils. Nevertheless, seldom researches have concentrated on quince essential oil (QEO). The chemical composition, cellular activity, antioxidant activity, and α-glucose inhibition activity of the plant were studied. QEO was isolated using hydrodistillation technique, and the yield was 1.3 mL/kg. A total of 52 chemical constituents in QEO were determined by gas chromatography-mass spectrometry (GC–MS). The main components (> 3.0%) found in the QEO were methyl (Z)-octadec-6-enoate (16.2%), methyl linoleate (10.0%), cedrenol (8.8%), methyl hexadecanoate (7.2%), methyl palmitoleate (7.2%), dibutyl phthalate (5.4%), hexadecanal (4.7%), 12,15-octadecatrienoicacid, ethylester, (Z,Z,Z)-9 (4.2%), α-eudesmol (3.5%), terpinen-4-ol (3.3%), and palmitic acid (3.2%). The antioxidant activity was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging method. Then, the α-glucose inhibitory activity of the essential oil was analyzed. We investigated the effects of this plant on NO production and cell viability in H 2 O 2 –induced oxidative stress HUVCEs. The results showed that the QEO had significant antioxidant activity and α-glucose inhibitory effect. Furthermore, the results revealed that QEO could protect HUVECs from oxidative stress and effectively inhibited NO production in that condition. To summarize, the results of this study demonstrated the excellent cellular and antioxidant activity of QEO, and it has potential biological significance in the treatment of cardiovascular diseases.
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CELLULOSE
·
2022
·Vol. 29
·期 10
·5883-5893
·
IF 6.123
Wei Yuyi,Dai Zhenhua,Zhang Yanfei,Zhang Weiwei,Gu Jin,Hu Chuanshuang,Lin Xiuyi
Increasing electromagnetic pollution calls for electromagnetic interference (EMI) shielding materials, especially sustainable, lightweight, and environmentally stable, biomass-based materials. MXene-coated wood (M/wood) is prepared by simply spraying MXene sheets on the wood surface. Varying this spray coating manipulates the shielding performance and its application to different wood species. The M/wood exhibits high electrical conductivity (sheet resistance is only 0.65 Ω/sq) with an excellent EMI shielding effectiveness of 31.1 dB at 8.2 ~ 12.4 GHz and is also fire retardant. Furthermore, waterborne acrylic resin (WA) is coated on M/wood to enhance environmental stability. The WA coating improves EMI shielding performance stability after water-soaking and drying testing and prevents the peeling of MXene from wood. These satisfactory properties of WA-M/wood and the facile manufacturing approach promote the feasibility of wood-based EMI shielding materials. Graphical abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 40
·61534-61546
·
IF 5.19
Tan Jiangtao,Chen Yongjian,Mo Zhaowen,Tan Chunju,Wen Runhao,Chen Zhengtong,Tian Hua
Metal nanoparticles and microplastics are becoming important pollutants in agricultural fields, but there are few studies on the interaction of zinc oxide nanoparticles (ZnONPs) and polyethylene (PE) microplastics with rice seedlings. The two rice cultivars Xiangyaxiangzhan and Yuxiangyouzhan were grown at three ZnONP levels (0 mg L −1 , 50 mg L −1 , and 500 mg L −1 ) and three PE levels (0 mg L −1 , 250 mg L −1 , and 500 mg L −1 ), and the growth, physiological attributes, and Zn uptake of rice seedlings were measured. Result showed that the ZnONPs and PE treatment effects on the investigated parameters differed between the cultivars, whilst Yuxiangyouzhan produced 6.98% higher in mean total dry biomass than Xiangyaxiangzhan. The mean total dry biomass in Xiangyaxiagnzhan and Yuxiangyouzhan changed by 10.22–30.85% and − 11.74–25.58% under ZnONPs, respectively. The PE treatments reduced growth parameters in Xiangyaxiangzhan, whilst the 250 mg L −1 PE treatment reduced the growth parameter of Yuxiangyouzhan. Besides, the ZnONP treatment had a stronger effect on rice seedling growth than the PE treatment. Furthermore, the ZnONPs modulated the physiological parameter in plant tissue of the two rice varieties. ZnONP treatment lead to the accumulation of Zn in plant tissue and the shoot Zn content was strongly related to shoot cellulose content. Overall, ZnONPs and PE treatments modulated the growth, physiological and biochemical attributes, and Zn uptake of rice seedlings, and the cultivars and dose effects could not be ignored.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7896-7908
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IF 4.682
Xu Tianye,Lu Shun,Wang Yajie,Gan Xiaoyan,Guo Liling,Liu Hanxing
Two-dimensional (2D) perovskite formed by introducing various organic spacer cations into 3D perovskite is considered to be one of the most effective methods to improve the humidity stability of perovskite materials. In order to solve the phase inhomogeneity and phase distribution nonuniformity of two-dimensional perovskites, additive engineering technique is widely used during their fabrication processes. Although many additives are proved to be effective in improving the quality of perovskite films, the mechanism of additive engineering has not been fully understood. In our work, we prepare 2D Ruddlesden–Popper perovskites based on 4-bromophenylethylammonium (BPEA) using a new additive of ionic liquids MAAc (methylammonium acetate). The (BPEA) 2 (MA) 4 Pb 5 I 16 perovskite prepared with the assistance of MAAc exhibits a stable photoelectric conversion efficiency (PCE) of 8.47%, which is much higher than the one without MAAc additive (4.79%). Besides a nearly tenfold increase in electron mobility, the unencapsulated (BPEA) 2 (MA) 4 Pb 5 I 16 -based device with MAAc additive remains 88% of its initial efficiency after 960 h exposure to air with a humidity of 20 ± 5% at room temperature, while the device without additive decreases to 63% of its initial efficiency. Meanwhile, the interactions between PbI 2 and MAAc at different temperatures and molar ratios are investigated and the formation mechanism of 2D perovskites in the presence of MAAc is proposed. It is found that an intermediate perovskite with distorted [PbI 6− x Ac x ] 4− octahedron is formed with the addition of MAAc, making the quality and photoelectric properties of the resultant films greatly enhanced.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Zhang Xiangxiang,Li Chao,Liu Fukai,Mu Wei,Ren Yongshuo,Yang Boyu,Han Xiaojun
Bottom-up synthesis of prototissues helps us to understand the internal cellular communications in the natural tissues and their functions, as well as to improve or repair the damaged tissues. The existed prototissues are rarely used to improve the function of living tissues. We demonstrate a methodology to produce spatially programmable prototissues based on the magneto-Archimedes effect in a high-throughput manner. More than 2000 prototissues are produced once within 2 h. Two-component and three-component spatial coded prototissues are fabricated by varying the addition giant unilamellar vesicles order/number, and the magnetic field distributions. Two-step and three-step signal communications in the prototissues are realized using cascade enzyme reactions. More importantly, the two-component prototissues capable of producing nitric oxide cause vasodilation of rat blood vessels in the presence of glucose and hydroxyurea. The tension force decreases 2.59 g, meanwhile the blood vessel relaxation is of 31.2%. Our works pave the path to fabricate complicated programmable prototissues, and hold great potential in the biomedical field.
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Science China-Materials
·
2022
·Vol. 65
·期 7
·1805-1813
·
IF 8.64
Wang Yuchen,Liu Yaoyu,Zhang Man,Liu Biying,Zhao Zhiyue,Yan Kai
Nickel-based layered double hydroxides (LDHs) are promising electrode materials in the fields of energy storage (supercapacitors) and conversion (urea oxidation). The rational construction of atomic and electronic structure is crucial for nickel-based LDHs to realize their satisfactory electrochemical performance. Herein, we report a facile, ecofriendly, one-step synthesis process to construct petal-like oxygen-deficient NiAl-LDH nanosheets for hybrid super-capacitors (HSCs) and urea oxidation reaction (UOR). The asprepared NiAl−LDH nanosheets with rich oxygen vacancies possess a large specific surface area of 216.6 m 2 g −1 and a desirable electronic conductivity of 3.45 × 10 −4 S cm −1 to deliver an ultra-high specific capacitance of 2801 F g −1 (700 C g −1 ) at 1 A g −1 . Furthermore, high specific energy of 50.0 W h kg −1 at 400 W kg −1 and excellent cycle stability with 91% capacitance retention after 10,000 cycles are achieved by the NiAl-LDHs/CFP (carbon fiber paper) (+)//YP-80F (a commercial activated carbon) (−) HSC. Besides, NiAl−LDH nanosheets also work as an efficient electrocatalyst for UOR, which only requires 1.42 V vs. reversible hydrogen electrode to drive 10 mA cm −2 in 1 mol L −1 KOH with 0.33 mol L −1 urea. This remarkable performance is superior to most reported values of previous candidates owing to the thin structure of NiAl−LDH nanosheets for exposing more active sites and abundant oxygen vacancies. In addition, various reaction parameters are investigated to optimize the electrochemical performance. In general, this work paves a new way for the architecture of multifunctional nanostructured energy materials.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 8
·3270-3278
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IF 4.705
Chu Hong-ying,Li Hua-bei,Sun Xiao-yan,Zhang Yao-wang
In this paper, we synthesized a kind of bio-based plasticizer epoxidized linoleic acid cardanol ester (ELCE) from cardanol and linoleic acid. Its chemical structure was characterized with FT-IR and 1 H NMR. Polyvinyl chloride (PVC) blends plasticized with ELCE were prepared via thermoplastic blending with torque rheometer. The performance including torque, mechanical property, thermal stability, plasticizing property and migration resistance of plasticized PVC blends were investigated and compared with plasticized PVC blends with commercial plasticizer dioctyl phthalate (DOP). The results showed that ELCE improved thermal stability of PVC blends. ELCE played more excellent plasticizing effect on PVC blends than DOP. The better solvent extraction resistance and volatile resistance of ELCE make it possible to completely replace DOP in PVC products.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 5
·491-503
·
IF 3.815
Wu He-Cheng,Feng Yuan,Song Xing-Ying,Song Chun-Yang,Chen Jin-Lin,Wang Yan-Chao,He Xue-Ling,Liang Rui-Chao,Li Jie-Hua,Tan Hong
Improvement of the treatment for Glioblastoma multiforme (GBM) especially the development of in situ controllable drug release is still a major concern. In this study, we developed waterborne biodegradable polyurethane (WBPU) scaffolds incorporated with redox-sensitive and RGD-decorated paclitaxel (PTX) polymer-drug conjugates (PDCs) for targeted GBM therapy in situ . The drug scaffolds could be implanted at residual GBM site post-operation. Dual-targeting PTX-PDCs were obtained through step-by-step conjugation of disulfide linked PTX, poly(ethylene glycol) (PEG), and arginine-glycine-aspartic acid (RGD). The RGD-modified PTX-PDCs were spherical nanoparticles (NPs) that would be released from scaffolds and identified GBM cells actively. Internalized redox-sensitive PTX-PDCs would be decomposed and release PTX inside GBM cells under the circumstances of glutathione (GSH). The release profiles of PTX from the scaffolds with/without GSH were investigated. In vitro cytotoxicity assay revealed that the dual-targeting PTX-PDCs from scaffolds could specifically kill GBM cells and protect normal cells, suggesting that dual-targeting PTX-PDC-loaded scaffolds may have the potential to repair tumor-induced brain injury. In vivo anti-recurrence assay indicated that the PTX-PDC-scaffolds could deliver PTX-PDCs to the GBM cells followed by inhibiting tumor growth and inducing apoptosis. In general, the PTX prodrug-loaded devices exhibited significant anti-GBM effects and normal tissue protection simultaneously, indicating that the WBPU scaffolds incorporated with dual-targeting PTX-PDCs may be a promising strategy for local therapy of GBM.
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Molecular Cancer
·
2022
·Vol. 21
·期 1
·1-17
·
IF 41.444
Pan Zhenzhen,Wang Kai,Wang Xiniao,Jia Zhirong,Yang Yuqi,Duan Yalei,Huang Lianzhan,Wu Zhuo-Xun,Zhang Jian-ye,Ding Xuansheng
Background The use of epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) brings remarkable benefits for the survival of patients with advanced NSCLC harboring EGFR mutations. Unfortunately, acquired resistance seems to be inevitable and limits the application of EGFR-TKIs in clinical practice. This study reported a common molecular mechanism sustaining resistance and potential treatment options to overcome EGFR-TKIs resistance.Methods EGFR-TKIs resistant NSCLC cells were established and confirmed by MTT assay. Cholesterol content was detected and the promotional function of cholesterol on NSCLC growth was determined in vivo. Then, we identified ERRα expression as the downstream factor of cholesterol-mediated drug resistance. To dissect the regulatory mechanism, we conducted experiments, including immunofluorescence, co-immunoprecipitation, luciferase reporter assay and chromatin immunoprecipitation assay.Results Long-term exposure to EGFR-TKIs generate drug resistance with the characteristic of cholesterol accumulation in lipid rafts, which promotes EGFR and Src to interact and lead EGFR/Src/Erk signaling reactivation-mediated SP1 nuclear translocation and ERRα re-expression. Further investigation identifies ERRα as a target gene of SP1. Functionally, re-expression of ERRα sustains cell proliferation by regulating ROS detoxification process. Lovastatin, a drug used to decrease cholesterol level, and XCT790, an inverse agonist of ERRα, overcome gefitinib and osimertinib resistance both in vitro and in vivo.Conclusion sOur study indicates that cholesterol/EGFR/Src/Erk/SP1 axis-induced ERRα re-expression promotes survival of gefitinib and osimertinib-resistant cancer cells. Besides, we demonstrate the potential of lowing cholesterol and downregulation of ERRα as effective adjuvant treatment of NSCLC.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 4
·1-8
·
IF 2.983
Xu Tianwen,Wang Xueqin,Zhang Xin,Bai Zhongchen
An ideal surface-enhanced Raman scattering (SERS) substrate should exhibit a high electromagnetic field enhancement factor, simple preparation repeatability low cost. Here, we prepared a reproducible nanoplasmonic paper SERS substrate via a silver mirror reaction (SMR) and AgNO 3 -ascorbic acid (AgNO 3 -ASC) solution treatment method to reduce Ag nanoparticles (Ag NPs) on the surface of the flexible glass fiber filter paper (GFP). GFP with Ag NPs (AgNPs@GFP) was used for SERS to detect melamine molecules (MMs). The results showed that melamine molecules’ detection limit was up to 1 ng/mL. The maximum enhancement factor of the SERS signal reached 838, and the sensitivity was 150. This strategy of fabricating SERS substrates based on GFP can provide a new way to prepare a low-cost flexible SERS substrate and increase the sensitivity of biomolecules.
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