Science China-Chemistry
·
2022
·Vol. 65
·期 12
·2517-2527
·
IF 10.138
Wen Ying,Long Zhiqing,Huo Fangjun,Yin Caixia
Altered metabolism has long been recognized as a central hallmark of cancer; however, in the fluorescence imaging field, few studies have been conducted to label tumors by exploiting metabolic differences between cancer cells and normal cells. In this work, we successfully developed a metabolic probe MB-C for specific imaging of glutathione (GSH) dynamic metabolic pathways. GSH was endogenously metabolized to produce SO 2 via Na 2 S 2 O 3 and thiosulfate sulfurtransferase, equilibrating with sulfites/bisulfites. MB-C was allowed to be activated by GSH along with multi-fluorescence emission increased in red and green channels and further sequence-response metabolites (SO 2 ) of GSH in significant fluorescence ratio change of red and green channels. Furthermore, such evident fluorescence ratio changes could be used to distinguish cancer cells from normal cells and identify tumor and normal tissues. Therefore, GSH metabolic imaging was successfully applied to accurately label tumors, which provides a new idea and practical case for the precise visualization of malignant tumors.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 9
·6168-6177
·
IF 2.779
Chen Pu,Zhao Zhihua,Shao Zhigang,Tian Ye,Li Bo,Huang Bo,Zhang Shuaiwen,Liu Chunbo,Shen Xiaoqing
Semiconducting nanomaterials with different sizes and shapes have wide applications in the field of electronics, and one of the key pathway to improve their performance is by recombination of different materials. In our innovative work, the nanocomposites of polypyrrole (PPy) and MXene were prepared by a simple in situ polymerization reaction. The samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The samples were made into sensors, and the gas sensitivities of the materials were investigated under different test conditions. The results showed that the response value of PPy/MXene-12 sensor to 100 ppm ammonia at room temperature was 2.38 times than that of pure PPy and 6.38 times than that of pure MXene. In addition, the sensor has excellent selectivity and low detection limit, which demonstrate the excellent practicability of them in the field of Internet of Things (IoT).
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高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 148
·期 1
·144-153
·
IF 2.799
Liu Yong,Liu Weihua,Shao Xiaonan,Wang Jianhong,Li Xiying,Zhang Haiyan
Abstract In this work, dicationic acidic heteropolyanion-based ionic liquids were synthesized, and used in transesterification reaction of methyl acetate with isooctyl alcohol for producing isooctyl acetate. Compared with H 2 SO 4 , and H 3 PW 12 O 40 , [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] shown excellent catalytic performance. The reaction kinetics and chemical equilibrium of the transesterification catalyzed by [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] were investigated. The effects of reaction temperature, initial reactant molar ratio, and catalyst concentration on the kinetics were studied in detail. The kinetic data were successfully correlated by a pseudohomogeneous model in the temperature range of 328.15 − 343.15 K. The simulation values obtained by the kinetic model were in good agreement with the experimental data. Moreover, [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] could be easily recovered and reused five times without any obvious decrease in catalytic activity. Graphical Abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 15
·20891-20902
·
IF 2.478
Peng Long-Gui,Ni Fu-Rong,Liu Jun,Sun Meng,Chang Meng-Jie,Xi Tong,Li Hui-Lu,Du Hui-Ling,Yang Jie,Li Ying
Bismuth vanadate (BiVO 4 ) is a promising photocatalyst material for photocatalytic degradation of organic pollutions. However, the fast recombination of photo-induced charge and insufficient light absorption often lead to poor photocatalytic performance. Herein, novel fibrous BiVO 4 /CdS (BVO/CdS) heterostructures are constructed by uniformly modifying caterpillar shaped electrospun BiVO 4 nanofibers with controllable quantity of CdS nanoparticles through hydrothermal reaction. The absorption of visible light and separation efficiency of photo-generated charge of BiVO 4 are significantly promoted after the decoration of CdS nanoparticles. As a result, the photocatalytic efficiency of the optimized BVO/CdS sample (BVO/CdS-2 stands for the sample synthesized with 0.05 mmol Cd(CH 3 COO) 2 and CH 4 N 2 S) is 90.43%, which is 3.3 times as high as that of pure BiVO 4 after 180 min irradiation under visible light, respectively. Moreover, the .O 2 − and .OH are the predominant active species for the degradation process indicated by scavengers added photocatalytic experiments. Due to the simple, low-cost and controllable synthetic process, the BVO/CdS heterojunctions are suitable for practical usage.
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高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 151
·期 7
·1961-1975
·
IF 2.482
Wei Congcong,Zhang Wei,Wang Xinpeng,Li Aihong,Guo Jianping,Liu Bo
Abstract Here, g-C 3 N 4 /TiO 2 photocatalysts with mesoporous structure and intimate interfacial connection were synthesized via the facile pyrolysis of g-C 3 N 4 /MIL-125 composites. The photocatalytic H 2 evolution reaction was performed to examine the photocatalytic activity of obtained photocatalysts. Under the UV–vis light irradiation, the average H 2 evolution rate of g-C 3 N 4 /TiO 2 sample with optimal g-C 3 N 4 loading content (4.12wt%) was most increased by up to 0.606 mmol·g −1 ·h −1 , a value which transcended that of as-prepared g-C 3 N 4 (0.138 mmol·g −1 ·h −1 ) and mesoporous TiO 2 (0.244 mmol·g −1 ·h −1 ) by a factor of 4.41 and 2.48, respectively. The improvement in photocatalytic activity of g-C 3 N 4 /TiO 2 composites was explained by the synergistic effect between large specific surface area, decreased energy band gap and intimate interface contact. This study demonstrated a new approach for the preparation of binary mesoporous heterojunction photocatalysts. Graphical Abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 24
·21078-21087
·
IF 2.324
Yang Zhenglong,Yu Jing,Fu Kangyu,Tang Fengfeng
The asymmetrical zinc phthalocyanine–multiwalled carbon nanotube hybrid material (aZnPc–MWCNT) were successfully prepared by in situ click chemistry of 4-(m-tolyloxygen)-5-nitrophthalonitrile and 4-azide-phthalonitrile modified MWCNT precursors in the Cu(I)/DBU catalyst system. In situ click chemistry reactions and covalent bonds between aZnPc and MWCNT were confirmed by FT-IR, UV–Vis and fluorescence spectra. The aZnPc–MWCNT red-shifted 12–690 nm compared with pristine ZnPc. The microstructure and morphology of aZnPc–MWCNT were investigated by TEM, SEM and AFM. The solubility of aZnPc–MWCNT could be significantly improved. After the ZnPc were uniformly distributed on the surface of MWCNTs, the aggregation of aZnPc–MWCNT was significantly reduced. The thermal degradation temperature of aZnPc–MWCNT was 72.8 °C higher than that of pristine ZnPc. TG results also indicated that the ZnPc content of aZnPc–MWCNT is 14.4%. It is expected that novel organic–inorganic donor–acceptor hybrid material possessing good solubility, optical and thermal stability properties would be obtained, and new materials for the preparation of organic electronic devices should be provided.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 53
·期 2
·899-906
·
IF 2.1
Wang Caiyun,Zhou Yanhong,Liu Zhimin
A composite of WO 3 and WS 2 has a wider wavelength range of light adsorption and light emission than WS 2 . A noble metal nanostructure can be utilized to adjust the photoluminescence (PL) of luminescent materials. In this study, WO 3 -WS 2 flakes were synthesized. A straightforward bath method has been employed to synthesize Ag nanoparticles (NPs). The average size of Ag NPs is approximately 60 nm. The Fourier transform infrared (FT-IR) peak of WO 3 -WS 2 flake at 495 cm −1 is from an alkane S–S bond stretching vibration. The PL intensity of WO 3 -WS 2 was attenuated subsequent to its integration with Ag NPs. The PL quantum yield of the WO 3 -WS 2 /Ag composite can reach 0.11%. This occurrence can be explained by the pronounced resonance absorption and diminished light extraction induced by the Ag NPs. This decreased light emission of the Ag NPs incorporated with WO 3 -WS 2 may be employed in some situations needing extinction, such as photography and projection. Graphical Abstract
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 1
·205-213
·
IF 2.606
Zhao Qian,Yang Wensheng,Zhang Qin,Qiu Liren,Zhou Min,Lu Shengshang,Tao Benfu,Wang Xinhai,Xie Quan,Ruan Yunjun
Sodium super ion conductor (NASICON) structure materials, known for fast diffusion channels for Na + , are promising solid electrolyte materials for sodium-ion batteries (SIBs). However, the high carbon content in the NASICON electrolyte materials originated from the carbothermal reduction (CR) reaction will cause short-circuit and self-discharge of the batteries. Herein, we developed a facile and straightforward two-stage calcining strategy to prepare Na 3 V 2 (PO 4 ) 3 (NVP) with high purity and crystallinity. By precisely controlling the dosage of reducing agent and heat temperature, the purity of NVP can reach 99.97%. Moreover, the NVP film was prepared by the as-synthesized pure NVP powder via fast hot-pressing sinter, whose Vickers hardness is (5.0 ± 0.4) × 10 2 HV and relative density is 99.05%. This study provides a safe and facile strategy to prepare high-purity NVP powder and high-quality NVP films, which is of great significance in exploring NVP as a solid electrolyte for SIBs.
Graphical abstract
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2016
·Vol. 23
·期 5
·1-11
·
IF 1.969
Huang Weihong,Kong Yu,Yang Wenming,Ni Xiaoni,Wang Ningwei,Lu Yi,Xu Wanzhen
Novel norfloxacin (NOR) thermosensitive magnetic molecularly imprinted polymers (T-MMIPs) were prepared with functional monomer methacrylic acid (MAA), temperature-response monomer N-isopropylacrylamide (NIPAM) and cross-linking agent N,N′-methylenebisacrylamide (MBA) by the surface imprinting technique. The silica layer and imprinted polymers layer coated on the surface of Fe 3 O 4 nanoparticles, forming double-shell structure. The morphology and composition of the thermosensitive magnetic molecularly imprinted polymers were investigated by transmission electronmicroscope (TEM), Fourier transform infrared spectrometry (FT-IR), thermogravimetic (TGA), vibrating sample magnetometer (VSM), powder X-ray diffraction (XRD) and nitrogen adsorption analysis. The phase behavior and thermosensitivity of T-MMIPs were studied by swelling experiments and adsorption tests at different temperatures. And the adsorption performance of T-MMIPs at 35 °C were evaluated by adsorption experiments, including kinetic, isotherm and selectivity tests. The maximum capacity of T-MMIPs at 35 °C was 52.85 mg g −1 . In selective recognition tests, the T-MMIPs showed the highest selectivity for NOR among four components while the T-MNIPs showed similarly adsorption for all components. The prepared T-MMIPs have great potential in the detection and separation of norfloxacin due to the good temperature response, adsorption capacity, selectivity and reusability.
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高影响因子
JOURNAL OF FLUORESCENCE
·
2011
·Vol. 22
·期 2
·729-736
·
IF 1.966
Li Yan-Yan,Yan Bing,Guo Lei
In this paper, the organic ligands TTA and TAA are grafted onto the coupling agent to achieve the organic precursors (TTA-Si, TAA-Si) as first ligand and the organic 4-(4-nitrostyryl)pyridine (Nspy) is synthesized as the second ligand. Both of them are coordinated to the rare ions with the carbonyl group and nitrogen atom respectively. After the hydrolysis and copolycondensation between the teraethoxysilane (TEOS) and the ternary rare earth organic complex via the sol–gel process, the chemical bonded hybrid materials are constructed and characterized in detail. The obtained hybrid materials present superior thermal stabilities and regular and homogenous square blocks microstructure. Among the hybrids Eu(TTA-Si) 3 Nspy shows a more strong characteristic emission and longer lifetime than the hybrids Eu(TAA-Si) 3 Nspy, while hybrids Tb(TAA-Si) 3 Nspy exhibits the stronger characteristic emission and longer lifetime than the hybrids Tb(TTA-Si) 3 Nspy. For Sm 3+ hybrid materials, the photoluminescence of Sm(TAA-Si) 3 Nspy is too weak to find in the characteristic emission spectra, meanwhile, Sm(TTA-Si) 3 Nspy has the excellent luminescent intensity.
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PubMed
高影响因子
Nano Research
·
2020
·Vol. 13
·期 12
·3261-3267
·
IF 8.183
Han Shenghui,Lian Gang,Zeng Xiaoliang,Cao Zhaozhen,Wang Qilong,Cui Deliang,Wong Ching-Ping
Developing metal-free and long lifetime room-temperature phosphorescence (RTP) materials has received tremendous interest due to their numerous potential applications, of which stable triplet-excited state is the core challenge. Here, boron carbon oxynitride (BCNO) dots, emitting stable blue fluorescence and green RTP, are reported for the first time. The obtained BCNO dots exhibit an unexpected ultralong RTP lifetime of 1.57 s, lasting over 8 s to naked eyes. The effective doping of carbon and oxygen elements in boron nitride (BN) actually provides a small energy gap between singlet and triplet states, facilitating the intersystem crossing (ISC) and populating of triplet excitons. The formation of compact cores via crystallization and effective inter-/intra-dot hydrogen bonds further stabilizes the excited triplet states and reduces quenching of RTP by oxygen at room temperature. Based on the water-soluble feature of BCNO dots, a novel advanced security ink is developed toward anti-counterfeiting tag and confidential information encryption. This study extends BCNO dots to rarely exploited phosphorescence fields and also provides a facile strategy to prepare ultralong lifetime metal-free RTP materials.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 3
·2007-2015
·
IF 2.019
Pang Lingyun,Ni Xiuyuan
In this article, we have carried out the polymerization of vinyl imidazole and pyrrole by using graphene oxide (GO) as photoinitiator, aiming to obtain a new nanocomposite for fabricating functional devices through solution processing. The structures of the as-synthesized ternary GO–polyvinyl imidazole–polypyrrole (GO–PVim–PPy) composite were studied by specular reflection infrared spectroscopy, transmission electron microscopy, atomic force microscopy and ultraviolet–visible spectrophotometer. The as-synthesized composites show the good water dispersibility which is generated from the structures of the composites. Raman spectroscopy and X-ray photoelectron spectroscopy were used to analyze the properties of the material interface. Moreover, by using the ternary composite as the active layer, the memory devices with the sandwich structure of Al/GO–PVim–PPy/ITO were fabricated by the spin coating. The prepared devices exhibit the nonvolatile resistive switching memory properties with the ON/OFF-state current ratio reaching 10 6 and the retention time exceeding 10 4 s. The charge transport characteristics at ON-state and OFF-state were studied by analyzing the current–voltage curves.
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高影响因子
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