Solar RRL
·
2018
·Vol. 2
·期 9
·1800084
·
IF 0
Senyun Ye,Haixia Rao,Dongyang Zhang,Mengying Bian,Zifeng Zhao,Feidan Gu,Ziran Zhao,Yinlin Chen,Huiqiong Zhou,Zhiwei Liu,Zuqiang Bian,Chunhui Huang
The solution-processed 8-hydroquinolatolithium (Liq) has first been demonstrated as a highly effective cathode interfacial layer (CIL) in inverted perovskite solar cells (PSCs). Compared with the control device without a CIL, the Liq-based device possesses a faster charge transport rate, a lower surface work function of Ag electrode, a larger built-in potential, and a higher charge recombination resistance, probably due to the formed interface dipole between [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) and Ag induced by Liq, which eventually results in a great improvement of device performance. After optimization, the Liq-based PSC has achieved a power conversion efficiency higher than 19%. These results will assuredly expand the present limited range of available solution-processable cathode interfacial materials for low-cost high-performance PSCs.
✓ 已验证
产品关联
DOI
Polymers
·
2018
·Vol. 10
·期 4
·437
·
IF 2.935
Bing Zhang,Shixing Wang,Likang Fu,Libo Zhang
A new adsorbent was prepared via modified poly(glycidyl methacrylate) with 8-aminoquinoline (AQ-PGMA) for the recovery of Pd(II) from solution. The practical application values of AQ-PGMA, including efficiency, selectivity and reusability for the recovery of Pd(II), are proved by the various experiment parameters. The parameters include HCl concentration, adsorption time, initial Pd(II) concentration, coexisting ions and reused cycles. The prepared AQ-PGMA showed a high adsorbing capacity for Pd(II) (up to 267.90 mg/g) when the concentration of HCl is higher than 0.4 mol/L. The analysis of the adsorption process indicated that the adsorption kinetics followed a pseudo-second-order kinetic model and the adsorption isotherms obeyed the Hill model. The Hill model showed that one adsorption site on the AQ-PGMA could combine 1.45 Pd(II). In addition, the obtained adsorbent demonstrated good regenerative ability and satisfying selectivity for the recovery of Pd(II). The adsorption mechanism was dominated by the chelation and ion exchange reactions between amines/hydroxyl groups and Pd(II). The experiments confirmed that AQ-PGMA was efficient for recovery of Pd(II) from highly acidic aqueous solutions.Keywords:adsorption;palladium;efficiency;selectivity;reusability
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2018
·
IF 4.427
Baida Kong,Xia Wang,Bingnan He,Lai Wei,Jianbo Zhu,Yuanxiang Jin,Zhengwei Fu
Fluorotelomer alcohols (FTOHs, F(CF 2 ) n CH 2 CH 2 OH) are members of per- and polyfluoroalkyl substances (PFASs) and are increasingly used in surfactant and polymer industries. FTOHs pose hepatotoxicity, nephrotoxicity and endocrine-disrupting risks. Nevertheless, there is limited research on the immunotoxic effects of FTOHs. In this study, we examined the immunotoxicity of 8:2 FTOH (n = 8) on murine macrophage cell line RAW 264.7. The results showed that 8:2 FTOH exposure reduced cell viability in dose- and time-dependent manners, inhibited cell proliferation and caused cell cycle arrest. Exposure to 8:2 FTOH downregulated the mRNA expression of some cell cycle-related genes, including Cdk4 , Ccnd1 , Ccne1 , and p53 , but also upregulated the mRNA expression of other cell cycle related genes, including Ccna2 , p21 , and p27 . Additionally, exposure to 8:2 FTOH under unstimulated and LPS-stimulated conditions downregulated the mRNA expression of pro-inflammatory genes, including Il1b , Il6 , Cxcl1 , and Tnfa , and secreted levels of IL-6 and TNF-α. Treatment with 8:2 FTOH upregulated the mRNA expression of antigen-presenting-related genes, including H2-K1 , H2-Ka , Cd80 , and Cd86 . The abovementioned immunotoxic effects caused by 8:2 FTOH in RAW 264.7 cells were partially or completely blocked by co-treatment with hydralazine hydrochloride (Hyd), a reactive carbonyl species (RCS) scavenger. However, exposure to 8:2 FTOH did not exhibit any effects on intracellular reactive oxygen species (ROS) level with or without LPS stimulation. Taken together, these results suggest that 8:2 FTOH may have immunotoxic effects on macrophages and RCS may underlie the responsible mechanism. The present study aids in understanding the health risks caused by FTOHs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 34
·5056-5060
·
IF 3.304
Guangming Li,Xun Wang,Jilin Zhang
An environmentally friendly synthetic route for carbon dots/ZIF-8 fluorescent powders has been developed. It was found that the carbon dots can promote the growth of ZIF-8 crystals. The carbon dots/ZIF-8 fluorescent powders can be fabricated at a relatively low 2-methylimidazole/Zn2+ molar ratio (10 : 1) in aqueous solution at room temperature. Different morphologies and sizes of the carbon dots/ZIF-8 fluorescent powders are easily obtained by adjusting the 2-methylimidazole/Zn2+ molar ratio. The as-prepared carbon dots/ZIF-8 fluorescent powders can afford multi-colored imaging of latent fingerprints on different substrates and show great potential for latent fingerprint detection.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Mengmeng Fan,Fangyuan Gai,Yu Cao,Zhenbo Zhao,Yuhui Ao,Yunling Liu,Qisheng Huo
This work demonstrated the design and synthesis of millimetre-scale hierarchical porous spheres based on ZIF-8 and CS (chitosan) by in situ assembly and post-thermal treatment technology. The ZIF-8/CS spheres have been synthesized according to the assembly method, which exhibited honeycomb internal structures and micropores of 0.77 nm. While the annealed ZIF-8/CS spheres exhibited obvious mesopores with a BET surface area of 626.85 m 2 g −1 and maintained the honeycomb internal structures, which were obtained by calcinations in the tube furnace under nitrogen protection at 500 °C for four hours. The annealed ZIF-8/CS spheres exhibited hierarchical porous with macropores, micropores and mesopores after annealing process. The SEM image and the XRD pattern of annealed ZIF-8/CS spheres suggested the maintenance of shape and crystal structure of ZIF-8, indicated that the annealed ZIF-8/CS spheres were stable and robust. Particularly, the CO 2 uptake of annealed ZIF-8/CS spheres with 500 °C is 0.99 mmol/g, which obvious higher than that of as-synthesized ZIF-8/CS spheres and samples annealed at 450 °C, 525 °C and 550 °C. The enhancement of CO 2 uptake may attribute to the carbonization of CS and the enlarge micropores of ZIF-8 after annealing process. This approach could induce a simple way for industrial structuring ZIF-8-based adsorbents with improved CO 2 uptake.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2018
·
IF 3.716
Zhenkun Mao,Tao Bao,Zhentao Li,Zilin Chen
A novel ionic liquid (1-allyl-methylimidazolium chloride, AlMeIm + Cl − ) polymer monolith poly(ionic liquid- co -ethylene dimethacrylate) incorporated with zeolitic imidazolate framework-8 (ZIF-8-poly(IL- co -EDMA)) was firstly synthesized as stationary phases of monolithic column for capillary electrochromatography by one-step copolymerization. Incorporation of ZIF-8 into ionic liquid polymer monolith evidently enhanced the separation selectivity for four alkylbenzenes in reversed phase capillary electrochromatography (CEC), due to the synergistic effect derived from the same imidazole ring structure of ionic liquid and organic ligands of ZIF-8. Meanwhile, electroosmotic flow (EOF) was generated by ionic liquid in a wide range of pH values from 2.0 to 12.0. The resultant monolithic columns were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR). The results indicated that the prepared monolithic columns had good permeability and mechanism stability. The resultant monolithic columns were applied for the separation of neutral compounds, anilines and phenols. The highest column efficiency was 2.07 × 10 5 plates m −1 (theoretical plates, N) for toluene. Under optimal conditions, reproducibility was obtained with relative standard deviations (RSDs) of the retention time for run-to-run, day-to-day, column-to-column and batch-to-batch were in the range of 1.58 − 3.19%, 1.92 − 3.87%, 3.84 − 4.96% and 2.63 − 4.33%, respectively. Incorporation ZIF-8 into ionic liquid polymer monolith was a promising way for the application of new materials in the fabrication of novel monolithic columns.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 22
·9619-9628
·
IF 1.821
Dazhong Shen,Xiaolong Ma,Tingting Cai,Xilei Zhu,Xiaodong Xin,Qi Kang
In this work, the kinetic processes of zeolitic imidazolate framework-8 (ZIF-8) film growth and the adsorption of dichloromethane (DCM), trichloromethane (TCM) and carbon tetrachloride (CTC) on ZIF-8 film are monitored in real time using a quartz crystal microbalance sensor. It is shown that the growth kinetics of ZIF-8 film from a mixture of zinc nitrate and 2-methylimidazole consists of a rapid initial growth (0.22–1.1 μg cm−2 min−1) and later slow rearrangement stages. The time to obtain 50% of total equilibrium grown mass is in the range of 5.1–6.8 min. The mass deposited in the second, third and fourth cycles is 2.37, 3.36 and 4.08 times that in the first one (3.11 μg cm−2), respectively, and approaches a stable level after the fourth cycle. The as-prepared ZIF-8 film (0.70 μm) exhibits adsorption capacities of 568.3, 496.7 and 212.8 mg g−1 to DCM, TCM and CTC (20 °C), respectively. The initial adsorption rate of DCM is much higher than that of TCM and CTC. The difference in the adsorption behavior of the three chlorohydrocarbons is ascribed to the sieve effect of the pore apertures in ZIF-8 to the adsorbates. The adsorption kinetic data are in agreement with the pseudo-second-order model. For the adsorption in ZIF-8 film, the adsorption activation energies are 34.9 ± 5.6, 66.9 ± 5.5 and 49.1 ± 3.8 kJ mol−1; standard enthalpy changes of −63.2, −89.1 and −119 J mol−1, and standard entropy changes of −41.9, −45.3, and −50.1 kJ mol−1 K−1 have been evaluated for DCM, TCM and CTC respectively. The adsorption isotherms of DCM and TCM at 20 °C are fitted well by the Langmuir model while those of CTC and TCM at 60 °C follow the Freundlich model.
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
·
IF 3.453
Hong Jiang,Qing Yan,Rizhi Chen,Weihong Xing
Pd@ZIF-8 nanoparticles with uniform size and morphology were prepared via an assembly method that enables the crystallization of ZIF-8 in methanol in the presence of polyvinylpyrrolidone (PVP)-modified Pd nanoparticles. The molar ratios of Pd/Zn 2+ and 2-methylimidazole (Hmim)/Zn 2+ are important parameters affecting the physical and catalytic properties of the Pd@ZIF-8. The catalytic activities of the hybrid catalysts were evaluated by the hydrogenation of p -nitrophenol to p -aminophenol. The results indicate that the increase of Pd loading and p -nitrophenol conversion can be tuned by adding more amounts of PVP-Pd colloid, but a suitable amount of PVP-Pd (Pd/Zn 2+ ≤ 0.012) is helpful to the control of particle size of Pd@ZIF-8 and encapsulation of the Pd nanoparticles within the ZIF-8 crystals. Pd@ZIF-8 catalysts prepared with excessive or equal molar of Hmim relative to Zn 2+ have similar morphology and uniform particle size, where the Pd nanoparticles are fully confined within the ZIF-8 crystals without aggregation. Furthermore, the Pd@ZIF-8 catalysts exhibit the better catalytic performance for the p -nitrophenol hydrogenation owing to the high loading of well-dispersed Pd nanoparticles with the decreased Hmim/Zn 2+ molar ratio. This work would aid the development of high-performance Pd@ZIF-8 catalysts.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Cuiqing Wu,Qi Liu,Rongrong Chen,Jingyuan Liu,Hongsen Zhang,Rumin Li,Kazunobu Takahashi,Peili Liu,Jun Wang
Superhydrophobic coatings are highly promising for protecting material surfaces and for wide applications. In this study, superhydrophobic composites, comprising a rhombic-dodecahedral zeolitic imidazolate framework (ZIF-8@SiO2), have been manufactured onto AZ31 magnesium alloy via chemical etching and dip-coating methods to enhance stability and corrosion resistance. Herein, we report on a simple strategy to modify hydrophobic hexadecyltrimethoxysilan (HDTMS) on ZIF-8@SiO2 to significantly improve the property of repelling water. We show that various liquids can be stable on its surface and maintain a contact angle higher than 150°. The morphologies and chemical composition were characterized by means of scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FI-IR). In addition, the anticorrosion and antiattrition properties of the film were assessed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization and HT, respectively. Such a coating shows promising potential as a material for large-scale fabrication.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2017
·Vol. 9
·期 3
·83
·
IF 3.364
Shaofeng Liu,Jie Zhang,Weiwei Zuo,Wenjuan Zhang,Wen-Hua Sun,Hongqi Ye,Zhibo Li
The stoichiometric reactions of 8-(2,6-R1-4-R2-anilide)-5,6,7-trihydroquinoline (LH) with AlR3(R = Me or Et) afforded the aluminum complexesLAlR2(Al1–Al5,Al1: R1=iPr, R2= H, R = Me;Al2: R1= Me, R2= H, R = Me;Al3: R1= H, R2= H, R = Me;Al4: R1= Me, R2= Me, R = Me;Al5: R1= Me, R2= Me, R = Et) in high yields. All aluminum complexes were characterized by NMR spectroscopy and elemental analysis. The molecular structures of complexesAl4andAl5were determined by single-crystal X-ray diffractions and revealed a distorted tetrahedral geometry at aluminum. In the presence of BnOH, complexesAl1–Al5efficiently initiated the ring-opening homopolymerization ofε-caprolactone (ε-CL) andrac-lactide (rac-LA), respectively, in a living/controlled manner.Keywords:aluminum complexes;crystal structures;ring-opening polymerization;biodegradable polyesters
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2016
·Vol. 39
·期 18
·3647-3654
·
IF 2.741
Yan Xu,Jingjie Jin,Xianliang Li,Yide Han,Hao Meng,Junbiao Wu,Xia Zhang
Core–shell metal–organic framework materials have attracted considerable attention mainly due to their enhanced or new physicochemical properties compared with their single-component counterparts. In this work, a core–shell heterostructure of CoFe 2 O 4 -Zeolitic Imidazolate Framework-8 (ZIF-8@CoFe 2 O 4 ) is successfully fabricated and used as an solid-phase extraction adsorbent to efficiently extract Congo Red and Basic Red 2 dyes from contaminated aqueous solution. Vibrating sample magnetometry indicates that the saturated magnetization of ZIF-8@CoFe 2 O 4 is 3.3 emu/g, which is large enough for magnetic separation. The obtained hybrid magnetic metal-organic framework based material ZIF-8@CoFe 2 O 4 can remove the investigated dyes very fast within 1 min of the contact time. The adsorbent ZIF-8@CoFe 2 O 4 also shows a good reusability. After regeneration, the adsorbent can still exhibit high removal efficiency (∼97%) toward Congo Red for five cycles of desorption–adsorption. This work reveals the great potential of core–shell ZIF-8@CoFe 2 O 4 sorbents for the fast separation and preconcentration of organic pollutants in aqueous solution before high-performance liquid chromatography analysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Lijie Wang,Li Wan,Jianxin Wu,Yeke Chen,Yuting Yang,Tian Deng,JingTing Wu,Weiwei Xue,Li Song,Fang Dai
The guided tissue regeneration (GTR) procedure has become an important process for the treatment of periodontal tissue regeneration, using the membrane as a mechanical barrier to generate a distance across the defect that subsequently allowing bone regeneration. Due to the complexity of periodontal microenvironment caused by bacterial infections, inflammation, and fibrous tissue penetration, the guided tissue regeneration membrane is required to have antibacterial and barrier functions. We developed a loaded methylene blue @ ZIF-8 and hydroxyapatite gradient thermoplastic polyurethane Janus membrane for antibacterial osteogenic and barrier. This Janus membrane with a porous gradient structure was prepared to use phase-conversion method. The rough layer facilitated cell growth and promoted periodontal bone regeneration, whereas the smooth layer isolated the growing fiber tissue.The rapid release of reactive oxygen species in the early stage and continuous release of zinc ions by methylene blue @ZIF-8 can achieve long-term synergistic antibacterial effect, with antibacterial rates of 84 % and 72 % against Escherichia coli and Staphylococcus aureus, respectively, which can effectively reduce the local inflammation caused by bacteria. In summary, we applied the Janus membrane to a rat periodontal bone defect model, and the membrane showed good surgical performance, barrier properties, osteogenic properties, and antibacterial effects, which could have broad application prospects in the treatment of periodontal bone defects.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）