IONICS
·
2021
·Vol. 27
·期 7
·2945-2953
·
IF 2.817
Gong Xiaodong,Luo Huan,Liu Gang,Luo Cong,Niu Yanhua,Li Guangxian
The gel polymer electrolytes (GPEs) with poly(acrylonitrile-polyhedral oligomeric silsesquioxane)/poly(vinylidene fluoride) (PAN-POSS/PVDF) blends as free-standing porous membrane and ionic liquid (IL) as absorption substance were successfully prepared. By tuning the content of PAN-POSS, the porosity and absorptivity of the blended membranes could be regulated. Due to the higher porosity and absorptivity, the ionic conductivity of GPEs with 15 wt% PAN-POSS reaches to 1.91 × 10 −3 S cm −1 at 20 o C. Meanwhile, the electrolytes also show excellent mechanical properties, thermal stability, and fire resistance. More importantly, the high electrochemical window of 4.6 V (vs. Li/Li + ) has been acquired and the testing cells with Li metal anode and LiFePO 4 cathode show a tolerable rate performance. Such prepared GPEs are expected to be applied to lithium batteries with high safety and electrochemical performance.
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Nano Research
·
2021
·Vol. 14
·期 9
·3294-3302
·
IF 8.897
Lou Feijian,Zhang Guanghui,Ren Limin,Guo Xinwen,Song Chunshan
Nano structure including pore structure and amine assembly is critical for improving sorption and desorption kinetics for adsorptive CO 2 separation. The present work delineates (1) the influence of the nano-scale pore structure of amine-functionalized solid sorbents, and (2) effect of changing the assembly of amine molecules on surface of nano-porous SiO 2 on the rates of adsorption and desorption of CO 2 . 50PEI-MSN sorbent with inverted cone-shaped pores was prepared by using mesoporous silica nanospheres (MSN) with inverted cone-shaped pores for the loading of polyethyleneimine (PEI). Co-structure-directing (CSD) method was used to synthesize the sorbent with arranged amine assembly at nano-scale (2N-CSD). By comparison with 50PEI-SBA15 as a benchmark sorbent, both sorbents have improved sorption and desorption kinetics. There are significant effects of nano pore structure and amine assembly on the sorption and desorption kinetics. The inverted cone-shaped pores in MSN allow loading polymeric amines in their narrower ends and leaving larger pore mouths open for the transport of CO 2 ; 50PEI-MSN shows a maximum sorption rate of 81.4 mg·g −1 ·min −1 with average sorption rate of 25.4 mg·g −1 ·min −1 at 80 °C which are 34% and 59% higher than the corresponding values for 50PEI-SBA15; a maximum desorption rate of 38.4 mg·g −1 ·min −1 with average desorption rate of 11.8 mg·g −1 ·min −1 ramping from 30 to 95 °C which are 37% and 156% higher than the corresponding values for 50PEI-SBA15. The arranged monolayer-like amine assembly on surface of nanoporous SiO 2 likely provides high amine sorption sites through improved accessibility of amine, and 2N-CSD shows a maximum sorption rate of 60.5 mg·g −1 ·min −1 , with average sorption rate of 12.8 mg·g −1 ·min −1 at 30 °C which are 108% and 205% higher than the corresponding values for 50PEI-SBA15; a lower maximum desorption rate of 9.7 mg·g −1 ·min −1 and average desorption rate of 9.8 mg·g −1 ·min −1 ramping from 30 to 95 °C which is 250% higher than the corresponding value for 50PEI-SBA15. The present work demonstrates the importance of tailoring nano-scale pore structure and amine assembly for significantly improving sorption and desorption kinetics of adsorptive CO 2 separation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 10
·13581-13587
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IF 2.478
Chen Junzhe,Du Haiying,Xu Yifeng,Ma Boyu,Zheng Zhihong,Li Pengchan,Jiang Yuqiu
Carbon quantum dots (CQDs) were synthesized by coffee grounds as the carbon source under hydrothermal carbonization treatment for the first time. The obtained turn-on CQDs showed a strong emission at the wavelength of 460 nm, with an optimum excitation of 370 nm, and enrichment of the surface functional groups (–OH, –NH 2 ). Sodium cyclamate in an aqueous solution and the turn-on CQDs could form a core–shell structure by hydrogen bonding and van der waals bonding to enhance the fluorescent emission. With such a design, turn-on CQD-based fluorescence detection techniques towards sodium cyclamate could be realized. Under optimal conditions, a linear relationship was found in the range of 2.8–56 µmol/L sodium cyclamate with the detection limit (3 δ/k ) of 3.16 µmol/L which is lower than the national standard detection limit of 49.7 µmol/L. The sensitive method has a great application prospect in detection of sodium cyclamate in real samples owing to its low detection limit, simplicity and rapidity.
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JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 19
·11266-11277
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IF 4.22
Zeng Qingtao,Ma Piming,Lai Dehui,Lai Xuejun,Zeng Xingrong,Li Hongqiang
Abstract In recent years, eco-friendly superhydrophobic materials have aroused much attention. Herein, biodegradable poly(lactic acid) (PLA) was selected as basic material to fabricate superhydrophobic foam with electrothermal effect by dip-coating graphene oxide (GO) on the surface of PLA foam constructed through freeze-drying process and the subsequent reduction with hydroiodic acid. Owing to the micro-nano rough structure of pristine PLA foam and the coverage of low-surface-energy reduced GO (rGO), the obtained rGO@PLA foam exhibited excellent water repellency with a high water contact angle of 150.6°. The foam was able to separate different oil–water mixtures, and the separation efficiencies were all above 96%. Importantly, the rGO layer also endowed the PLA foam with electrothermal conversion capability, and the surface temperature of the rGO@PLA foam rapidly increased to 129.5 °C from 30.8 °C at a low voltage of 15 V within only 120 s. By means of the generated Joule heat, the rGO@PLA foam was successfully applied for separating viscous crude oil from water, and the separation rate was about 14 times higher than that without voltage. Our findings conceivably stand out as a new tool to fabricate functional biodegradable materials for clean-up of viscous crude oil. Graphical abstract
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 6
·1871-1880
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IF 2.647
Lv Xinrong,Wang Yanfang,Wang Ying-ao,Lin Xiaoyun,Ni Yongnian
In this work, the binary nanocomposite of crosslinked polyaniline nanorods (CPANINRs) and molybdenum disulfide (MoS 2 ) is first synthesized by in situ polymerization, and CPANINRs/MoS 2 on functionalized carbon cloth (CPANINRs/MoS 2 /FCC) is facilely constructed by a drop-casting method. The composition, morphology, and structure of the CPANINRs, MoS 2 , and CPANINRs/MoS 2 binary nanocomposite are characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The electrochemical properties of the MoS 2 /FCC, CPANINRs/FCC, and CPANINRs/MoS 2 /FCC are tested by cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD). The experiment results show that the CPANINRs/MoS 2 /FCC exhibits excellent stability and high specific capacitance, and its specific capacitance reaches 618.75 F g −1 at a current density of 0.5 A g −1 . The CPANINRs/MoS 2 /FCC has a long cycling life and the capacity retention of 91.46% is obtained after 2000 cycles at a large current density of 10 A g −1 . Moreover, the CPANINRs/MoS 2 /FCC-based symmetric supercapacitor also exhibits excellent rate performance and good cycling stability. The specific capacitance based on the total mass of the two electrodes is 106.4 F g −1 at a current density of 0.5 A g −1 and the capacitance retention of 93.6% is obtained after 2000 cycles. Graphical abstract
A binary nanocomposite of crosslinked polyaniline nanorods (CPANINRs) and molybdenum disulfide (MoS 2 ) is first synthesized by in situ polymerization, and CPANINRs/MoS 2 on functionalized carbon cloth (CPANINRs/MoS 2 /FCC) was facilely constructed for applications in supercapacitors. The CPANINRs/MoS 2 /FCC exhibited excellent stability and high specific capacitance, and its specific capacitance reaches 618.75 F g −1 at a current density of 0.5 A g −1 .
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 10
·13382-13395
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IF 2.478
Yang Lin,Xin Yanmei,Yao Congfei,Miao Yuqing
As an organic–inorganic hybrid material, metal organic frameworks (MOFs) has a great development prospect in the field of photocatalysis. Herein, the in situ growth of Bi-based MOF (CAU-17) on Bi 2 WO 6 was utilized to obtain Bi 2 WO 6 /CAU-17 photocatalyst by a simple solvothermal transformation method. Bi 2 WO 6 can be used both as template and Bi source. The structure and morphology of Bi 2 WO 6 /CAU-17 composites were characterized by X-ray diffraction patterns, X-ray photoelectron spectroscopy, Fourier transform infrared spectra, UV–vis diffuse reflectance absorption spectra and scanning electronic microscopy, and transmission electron microscope. The results showed Bi 2 WO 6 /CAU-17 composites were successfully constructed by growing CAU-17 in situ on Bi 2 WO 6 . Compared with pure Bi 2 WO 6 and CAU-17, Bi 2 WO 6 /CAU-17-1 h composite exhibited excellent photocatalytic activity for the degradation of Rhodamine B, and its rate constant was 0.02083 min −1 . In addition, the quantum yield and space time yield of the obtained photocatalyst were 2.56 × 10 −6 molecules/photon and 1.28 × 10 −7 molecules/photon·mg, respectively. Bi 2 WO 6 /CAU-17 also exhibits better values of the modified FOM (figure of merit). This method provides a potential opportunity for the development of in situ growth of similar MOF materials for water treatment and other possible applications in the future.
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Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 1
·138-149
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IF 5.693
Liu Chao,Yin Qing,Li Xi,Hao Lifen,Zhang Wenbo,Bao Yan,Ma Jianzhong
Water-based polymers have been widely used in coating materials, but their durability and service life are often greatly reduced due to macroscopic damage or cracking caused by external forces. In this paper, poly(propylene glycol) terminated with ortho-amiomethylphenyl diboronic acid (AMPBA-PPG) and cross-linked polymer containing boroxine (CLP-boroxine) were synthesized by nucleophilic substitution. Then the CLP-boroxine was introduced into waterborne polyurethane (WPU) to prepare AMPBA-PPG/WPU composite emulsion for leather finishing and CLP-boroxine/WPU composite film. The self-healing characterization results showed that the self-healing efficiency of the 15 wt% CLP-boroxine/WPU film was as high as 93.6% after only 4 h of water stimulation at room temperature. Compared with neat WPU finished leather, the leather samples finished with AMPBA-PPG/WPU exhibited more excellent wear-resistance. More importantly, the leather coating finished with AMPBA-PPG/WPU still showed nice wear-resistance even after wear and self-healing treatment. These results are attributed to that the hydrogen bonds between AMPBA-PPG and WPU, WPU, and WPU, and the dynamic reversible covalent bonds in AMPBA-PPG can improve/increase the self-healing efficiency of the composite coating. In addition, the boron hydroxyl groups in AMPBA-PPG could also react with the hydroxyl groups on the leather surface, thereby further improving the wear-resistance of the leather coating. Graphical abstract Dynamic boronate ester bonds can not only endow WPU excellent self-healing properties but also improve wear-resistance of its leather coating.
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MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-11
·
IF 5.833
Li Jingxian,Jiang Ding,Shan Xueling,Wang Wenchang,Ou Guofu,Jin Haozhe,Chen Zhidong
A novel aptasensor has been fabricated based on the resonance energy transform (RET) system from MoS 2 QDs-PATP/PTCA (donor) to NH 2 -UiO-66 (acceptor). The electrochemiluminescence (ECL) signal of PTCA was greatly amplified due to the decoration of MoS 2 QDs-PATP, and the NH 2 -UiO-66 was utilized to label the signal probe DNA (pDNA), which hybridizes with the exposed aptamer anchored on the surface of MoS 2 QDs-PATP/PTCA. With the target acetamiprid, the specific binding of acetamiprid to aptamer causes the connection between the donor and the acceptor to be interrupted and produce an “on” ECL signal. Thus, an “off-on” ECL sensing platform for sensitive and selective acetamiprid assay was designed. Under the optimal condition, the ECL signal of the aptasensor was found to be linearly related to the logarithm of the acetamiprid concentration ranging from 0.1 fM to 0.1 μM with a detection limit of 0.064 fM. More importantly, the recovery rate of the ECL aptasensor was calculated to be 98.7 ~ 106% with a RSD lower 5.1% for the residual acetamiprid assay in real food samples, which indicated that the aptasensor has high potential for practical applications. Graphical abstract
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PubMed
高影响因子
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-10
·
IF 4.38
Li Ran,Wang Yimei,Du Jie,Wang Xiangyu,Duan Ailin,Gao Ruifang,Liu Junyu,Li Bing
In the present work, we constructed nanoscale graphene oxide (NGO) as a drug nanocarrier to improve the process of tumor-targeted drug releases, promote cellular uptake and accumulation of chemotherapy drugs in tumor tissues, and reduce the toxic effects of chemotherapy drugs on normal cells. Hence, great stability was obtained in the biological solution. Moreover, we designed an effective nanoparticle system for the doxorubicin (DOX) delivery targeting the oral squamous cell carcinoma (OSCC) by mediating the HN-1 (TSPLNIHNGQKL) through hydrogen and π–π bonds. DOX@NGO-PEG-HN-1 showed significantly higher cellular uptakes and cytotoxicity in OSCC cells (CAL-27 and SCC-25), compared to free DOX. Moreover, HN-1 showed considerable tumor-targeting and competition inhibition phenomenon. As we expected, the nanocarrier showed pH-responsive drug release. In total, our study represented a good technique to construct OSCC-targeted delivery of nanoparticles and improve the anticancer medicines’ efficiency.
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PubMed
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 132
·期 1
·581-597
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IF 2.081
Zhao Qian,Lu Li,Wang Bin,Jiang Tingshun
The BiOI/Bi 2 O 2 CO 3 p–n junctions were constructed by anion exchange method with Bi 2 O 2 CO 3 in situ growth on BiOI. Then, the surfaces of BiOI/Bi 2 O 2 CO 3 samples were modified by negative charge with (3-aminopropyl) triethoxysilane (APTES) in an ethanol solution. Finally, the ami-BiOI/Bi 2 O 2 CO 3 /graphene (RGO) ternary composites were fabricates by the simple hydrothermal reaction. The obtained photocatalysts were well characterized with the various characterization techniques to study their morphological, physical, optical, and photocurrent properties, and have been evaluated by investigating the degradation of Rhodamine B and tetracycline under visible irradiation. Compared with single BiOI, the BiOI/Bi 2 O 2 CO 3 photocatalysts displays higher photocatalytic activity, due to the formation of the electric fields between p–n heterojunction to promote the migration of photogenerated carriers. Moreover, the ami-BiOI/Bi 2 O 2 CO 3 /RGO composites with the best photocatalytic activities can be attributed to that the positively charged ami-BiOI/Bi 2 O 2 CO 3 were coupled with the negatively charged graphite oxide (GO) by electrostatically attraction to form the effectively interfacial contacts, causing the photocatalytic reaction sites increased, the range of light response expanded, the separation of photogenerated charge further improved. This work provides a feasible strategy for the construction of high efficiency semiconductor and RGO nanocomposite photocatalyst.
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JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 4
·2034-2042
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IF 1.938
Zhu Y.,Lu Y.,Sun S. H.,Zhou B.,Hu Y. M.
High-purity copper sulfides including CuS, Cu 1.75 S and Cu 2 S were synthesized using an easy and controllable two-step heating method in a mixed solution of ethylene glycol and triethylenetetramine. Petal-like CuS, near-spherical Cu 2 S, and regular hexagonal Cu 1.75 S were obtained by simply changing the solvent volume ratio (SVR) of the mixed solution, i.e. the phase of the products solely determined by the SVR of the solution. The influence of the solvent on the final products as well as the reaction mechanism of the system were investigated and discussed. The approach is rapid, easily scalable, and environmentally friendly. As a preliminary application demonstration, dye-sensitized solar cells were assembled using the as-synthesized copper sulfides and photoelectric conversion efficiencies up to 3.62% were achieved.
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Journal of the Iranian Chemical Society
·
2021
·Vol. 18
·期 8
·2123-2133
·
IF 2.019
Kang Huiting,An Kai,Guan Lianxiong,Tian Dating
Magnetic molecularly imprinted polymers (MIPs) for urea were prepared using konjac glucomannan (KGM) as the substrate, methacrylic acid as the graft comonomer, ethylene glycol dimethacrylate as the cross-linker, urea as the template molecule, and Fe 3 O 4 NPs as the magnetic ingredient. The resultant MIPs were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, vibrating sample magnetometry, and Brunauer–Emmett–Teller spectroscopy. The MIPs possessed high superparamagnetism with core–shell structures, which could be easily separated from the mixture by an external magnetic field. The MIPs could specifically recognize urea, and the recognition capacity and adsorption performance remained almost unchanged after three cycles of adsorption and elution. The adsorption kinetics of MIPs on urea could be described by the second-order kinetic model. The maximum adsorption capacity of MIPs on urea was 16.80 mg/g, and the adsorption isotherms of MIPs on urea followed the Langmuir model. In addition, in vitro adsorption experiments through simulated body fluids showed that the MIPs had good adsorption capacity for urea. The product is expected to be used as a novel adsorption material for blood purification.
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