RSC Advances
·
2014
·Vol. 5
·期 6
·4184-4190
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IF 3.708
Qingwen Tian,Yong Cui,Gang Wang,Daocheng Pan
The metal chalcogenides are excellent choices as absorbers and buffer-layers in thin film solar cells. Versatile chemical approaches provide endless possibilities to prepare metal sulfide precursor solutions. Recently, Cu2ZnSnS(Se)4 thin films have played an important role in fabricating low-cost and high-efficiency solar cells. Here, we present a robust and low-cost 1,2-ethanedithiol/ethanolamine/2-methoxyethanol ternary solution process to prepare Cu2ZnSnS4 precursor solution and high-quality Cu2ZnSnS4 thin films. Low-cost Cu2O, ZnO and SnO are used as the raw materials, which can be easily dissolved in the 2-methoxyethanol solution of 1,2-ethanedithiol and ethanolamine at room temperature in air. By tuning the composition of the Cu2ZnSn(S,Se)4 thin film with a selenization process, an active-area power conversion efficiency of 7.34% has been achieved for Cu2ZnSn(S,Se)4 solar cell.
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高影响因子
Journal of Materials Chemistry A
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2014
·Vol. 2
·期 33
·13471-13478
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IF 0
Yunfeng Qiu,Zhuo Ma,PingAn Hu
We report the facile synthesis of environmentally benign Au NPs/chitosan composites and magnetic Au NPs/chitosan/Fe3O4 composites without employing any toxic reductants or capping agents. Renewable natural chitosan not only functioned as supporting matrix, but also served as a reductant and stabilizer for the formation and dispersions of Au NPs. Fe3O4 nanospheres were easily embedded into the chitosan matrix due to the strong complexation ability of chitosan with Fe3O4, which originated from the sharing of the lone electron pairs from the nitrogen atom in amine with FeII or FeIII on the surface of Fe3O4. The as-prepared magnetic composites exhibited much higher activities, as well as more convenient magnetic recyclability than other supported Au NPs towards the reduction of 4-nitrophenol. From the practical point of view, apart from good performance of the reduction of nitro compounds, the biocompatibility and biodegradability of present Au NPs/chitosan/Fe3O4 composites promote the potential applications in the biochemical catalysis or therapy.
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NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 10
·4182-4189
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IF 3.269
Kun Zeng,Fu-xing Lin,Juan Xie,Mo-zhen Wang,Jie-lin Rong,Yu Zhao,Ye-zi You,Anila Asif,Xue-wu Ge
The development of gene carriers with high delivery efficiency and enough biosafety to replace the current viral vectors and cationic liposomes has long been a key project to achieve the practical application of gene therapy. As an abundant natural polymer, chitosan (CS) possesses incomparably high biocompatibility. However, when it is used as a gene carrier, the gene transfection efficiency is rather disappointing. Herein, we prepared a novel chitosan derivative, poly(tributyl-(4-vinylbenzyl)phosphonium)-grafted CS (CS-P), via γ-ray radiation-induced grafting copolymerization of tributyl-(4-vinylbenzyl)phosphonium in an acidic solution of CS. The CS-P could combine with pEGFP through a complex coacervation method to form pEGFP-loaded CS-P complex particles with a size of about 150 nm and a high positive zeta potential of 41.7 ± 6.1 mV. Agarose gel electrophoresis and an MTT assay show that the pEGFP-loaded CS-P particles have excellent biosafety, superior to pEGFP-loaded unmodified CS particles. In vitro and in vivo gene transfection experiments based on HeLa cells confirmed that pEGFP loaded into CS-P particles exhibits much higher gene transfection efficiency than that loaded into unmodified CS. This work provides not only a new way to modify CS with quaternary phosphonium, but also a useful and feasible way to obtain new CS-based gene vectors with high gene transfection efficiency and biosafety for potentially practical clinic applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Jian Lu,Yingying Qin,Qi Zhang,Yilin Wu,Jiuyun Cui,Chunxiang Li,Liang Wang,Yongsheng Yan
High-selective multilayered Li + -imprinted membranes (Li-IIMs) with enhanced hydrophilicity and stability were developed based on polyether sulfone substrate membranes. The multilayered structure was prepared with polydopamine (pDA) as the interfacial adhesion layer, SiO 2 nanoparticles as the hydrophilic layer and Li + -imprinted polymers as the imprinted layer. The selective “Li + -recognition sites” were formed using 12-crown-4 (12C4) as the adsorbing units. The optimal relative selectivity coefficients (α) of Li + /Na + and Li + /K + reached up to 1.85 and 2.07 with the imprinting factor ( β ) of 2.51, and the high permselectivity factors ( γ ) of Na + /Li + (7.39) and K + /Li + (9.86) were achieved on Li-IIMs. The Langmuir isotherm model and the pseudo-second-order kinetics model best fitted the rebinding data of Li-IIMs, as well as the rebinding capacities reached up to 90.3% of initial binding after 5 cycles of adsorption/desorption and just declined to 88.1% after another 5 cycles a month later. Therefore, the as-prepared Li-IIMs would have potential applications for the separation of lithium ions from salt lake brines.
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高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 5
·1699-1704
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IF 4.831
Chen Donghua,Peng Rulin,Zhou Hong,Liu Hui
Graphene oxide quantum dots (GOQD) are capable of enhancing the green chemiluminescence (CL) of the system composed of bis (2,4,6-trichlorophenyl) oxalate, hydrogen peroxide and fluorescein (TCPO/H 2 O 2 /fluorescein). It was found that 4-nitrophenol (4-NP) causes a further enhancement of the system, and this was exploited to develop a CL detection scheme for 4-NP. The optimum reaction concentrations were established, and under these conditions the calibration plot is linear in the 1.0 to 300 pmol L −1 concentration range, with a 0.3 pmol L −1 detection limit (at 3σ).We assume that CL enhancement is due to energy transfer from GOQD to fluorescein which is promoted by the interaction of 4-NP with the GOQD. The method was applied to the determination of 4-NP in spiked tap water and river water and gave recoveries between 93.4 and 107.9 %, with relative standard deviations of <4.0 %.
Graphene oxide quantum dots (GOQD) are good enhancer of Bis(2,4,6-trichlorophenyl) oxalate (TCPO) and hydrogen peroxide chemiluminescence (CL) system. The CL emission of fluorescein can be further enhanced by GOQD and this provides an extremely sensitive detection platform for 4-nitrophenol (4-NP).
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高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
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2016
·Vol. 71
·期 8
·869-874
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IF 0.686
Gao-Feng Wang,Xiao Zhang,Shu-Wen Sun,Hong Sun,Xia Yang,Hui Li,Chen-Zhong Yao,Shu-Gang Sun,Yu-Peng Tang,Li-Xin Meng
Two Mn(II) complexes, {[Mn(BIPMO) 2 Cl 2 ] · 2(H 2 O)} n ( 1 ) and {[Mn(BIPMO) 2 (SCN) 2 ] · 2(CH 3 OH)} n ( 2 ) (BIPMO = bis(4-(1 H -imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl − for 1 , and SCN − for 2 ) to form a distorted octahedral geometry.
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高影响因子
Food Analytical Methods
·
2017
·Vol. 10
·期 9
·3149-3157
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IF 2.038
Jing Shasha,Zheng Huijun,Zhao Li,Qu Lingbo,Yu Lanlan
A new sensitive electrochemical sensor based on poly(sodium 4-styrenesulfonate) (PSS) functionalized graphene and Co 3 O 4 nanoparticle clusters (PSS-GN/Co 3 O 4 ) ternary composite was fabricated via two-step synthesis. The PSS-GN/Co 3 O 4 nanocomposite significantly increased the oxidative activity of amaranth due to the individual merit and mutual effect of PSS-GN and Co 3 O 4 nanoparticle clusters which improved the performance of the electrochemical sensor with high sensitivity. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) measurements were used for the detection of amaranth. Under the optimal conditions, the oxidation peak currents of amaranth increased proportionally to the concentration within the range of 0.01–1.0 and 1.0–6.0 μmol L −1 , and the limit of detection was 4.0 nmol L −1 . The proposed modified electrode was highly sensitive and was successfully applied to determine amaranth in the soft drinks with satisfactory recoveries. The as-prepared PSS-GN/Co 3 O 4 /GCE electrochemical sensor offers a feasible way for designing simpler, low cost, and environment-friendly sensors based on Co 3 O 4 nanoparticle clusters.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
·
IF 4.233
Yu Long,Yansheng Liu,Ziming Zhao,Sha Luo,Wei Wu,Li Wu,He Wen,Ren-Qi Wang,Jiantai Ma
Pd-nitrogen-doped-carbon nanocatalysts (Pd-C/N) with different morphologies, such as porous spheres, yolk-shell and hollow structures, had been synthesized and compared. The yolk-shell Pd-nitrogen-doped-carbon nanocatalysts (YS-Pd-C/N) and hollow Pd-nitrogen-doped-carbon nanocatalysts (H-Pd-C/N) were prepared through different etch time using SiO 2 spheres as hard-templates. The as-prepared catalysts were characterized thoroughly by TEM , BET, XRD , FT-IR, and XPS . Importantly, the catalysts have moderate BET specific surface area in the range from 200 to 300 m 2 g −1 and pore volume between 0.2 and 0.3 cm 3 g −1 . The reduction of 4-nitrophenol is chosen as a model reaction to research the morphology effects of these prepared Pd-C/N catalysts with the same chemical compositions . Interestingly, H-Pd-C/N exhibited the best catalytic performance, which could be attributed to its high nitrogen content, the uniform distribution of abundant active sites, as well as the synergistic effect of graphitic C/N shell and Pd species for the catalytic reaction . Especially, the unique hollow morphology and porous shell of H-Pd-C/N made it to be a nanoreactor , which was beneficial to improve the catalytic activities. In addition, H-Pd-C/N nanocatalysts exhibited favorable stability in the recycling reactions.
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PubMed
高影响因子
FOOD CHEMISTRY
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2017
·
IF 4.529
Dezhi Yang,Xiaolan Li,Dongling Meng,Meng Wang,Yaling Yang
A magnesium–aluminum layered double hydroxides coated on magnetic nanoparticles (Fe 3 O 4 @MgAl-LDHs NPs) combined with the supramolecular solvents (SUPRASs) as the magnetic supramolecular fluids were successfully applied to the extraction and determination of four phenolic compounds (Bisphenol-A (BPA), bisphenol-AF (BPAF), tetrabromobisphenol-A (TBBPA) and 4-tert-octylphenol (4-TOP)). Magnetic supramolecular fluids (ferrofluids) composites were prepared through adding the mixture of n -octanol and tetrahydrofuran in distilled water as the supramolecular solvents into the solution containing magnetic Fe 3 O 4 @MgAl-LDHs NPs. Under the optimized conditions, the calibration curve was obtained in range of 5–1000 μg L −1 . The limits of detection (S/N = 3) for BPA, BPAF, TBBPA and 4-TOP, were obtained for 0.54, 0.48, 0.37 and 0.63 μg L −1 , respectively. The intra-day and inter-day precision (RSDs %) for bisphenols (BPs) and 4-TOP at 100 and 300 μg L −1 were in the range of 4.0–7.8. The enrichment factors were between 16 and 24.
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PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Haiping Wang,Yi Xu,Qingyan Bai,Shujuan Ma,Chunmiao Bo,Junjie Ou
2-Methyl-4-chlorophenoxyacetic acid (MCPA) is one of the most widely used herbicides, so adsorption and detection of MCPA in the environment is critical. Blue fluorescent carbon dot (CD) was synthesized from citric acid and urea, which could be quenched by MCPA. Herein, bifunctional molecularly imprinted polymer (CD@MIP) was prepared on monodisperse poly (glycidyl methacrylate- co -ethylene glycol dimethacrylate) microspheres, with 4-vinylpyridine as the functional monomer, ethylene glycol dimethacrylate as the cross-linking agent, and doped with CD. The enrichment ability of CD@MIP for MCPA and fluorescence detection performance were determined. The maximum adsorption amount of MCPA was 93.9 mg g −1 as determined by isothermal adsorption experiments and was in accordance with the Langmuir adsorption model. The results of the kinetic experiments showed that the adsorption equilibrium reached within 30 min, which possessed a relatively fast adsorption rate and was in accordance with the pseudo-second-order adsorption model. Both MIP without CD and non-imprinted polymers were also fabricated and tested as references. Fluorescence experiments showed good linearity of CD@MIP in the range of 0–80 μmol. The cabbage samples were analyzed by high performance liquid chromatography with a linear range of 0.02–15 μg mL −1 , recoveries of 90.5%–98% and low relative standard deviations (RSD, n = 3) of 1.5%–5.9%. CD@MIP with excellent performance provides a feasible practical application in the detection and enrichment of MCPA.
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PubMed
高影响因子
CHEMISTRY & BIODIVERSITY
·
2025
·
IF 2.5
Ya-Shuai Kang,Hao-Wen Zhu,Xue Zhao,Hao Ma,Yu Yang,Rui Xu,Fu-Yao Luo,Er-Wei Li,Qian Luo,You-Zhi Zhang,Chang-Wei Li
A total of 46 endophytic fungi were isolated from Huperzia serrata and then cultured in a standard liquid medium and PDB medium. Cytotoxicity and antimicrobial activity assays revealed that seven crude extracts exhibited significant inhibitory effects on MCF-7 and SH-SY5Y cell lines; four crude extracts effectively inhibited the growth of Candida albicans , and 12 crude extracts demonstrated potent inhibition effects on Staphylococcus aureus . Strains displaying antimicrobial activity or potential for producing novel metabolites were selected for identification. In total, 14 strains representing 7 genera were identified, 5 of which had not been previously documented regarding their secondary metabolites. A fungus, Penicillium panissanguineum SZSS 4-2-2 was preliminarily selected for further chemical investigation. From the fermentation extract of P. panissanguineum SZSS 4-2-2, one new compound ( 1 ), one new natural product ( 2 ), and two known compounds ( 3 and 4 ) were isolated. The structures of these compounds were elucidated through spectral analysis and calculated nuclear magnetic resonance and electronic circular dichroism data. Compound 1 demonstrated a significantly stronger inhibitory effect on lipopolysaccharide-induced nitric oxide (NO) production in RAW 264.7 macrophages, with an IC 50 value of 64.91 µM. By contrast, compounds 2 , 3 , and 4 exhibited only moderate inhibitory effects on NO production. Graphical In this study, a total of 46 endophytic fungi were isolated from H. serrata. Strains displaying antimicrobial activity or potential for producing novel metabolites were selected for identification. And, from the fermentation extract of one endophytic fungus, P. panissanguineum SZSS 4-2-2, one new compound (1), one new natural product (2), and two known compounds (3 and 4) were isolated.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Liangyun Yu,Jiajun Li,Jingjing Zhang,Xue Chen,Meng Yuan,Qi Zhang,Baocai Xu,Zhiliang Yao,Qin Xu
The accurate measurement of nitrophenols (NPs) in fine particulate matter (PM 2.5 ) is critical because NPs are identified as the main constituents of brown carbon in PM 2.5 , which influence the global radiative forcing and regional climate. Herein, we presented a specific and ultrasensitive photoelectrochemical (PEC) sensor (MIPs/Bi 2 WO 6 @GH/ITO) for 4-nitrophenol (4NP) detection by electrodepositing molecularly imprinted polymers (MIPs) polypyrrole on indium tin oxide coated glass (ITO) electrode modified with dual 3D structural Bi 2 WO 6 @graphene hydrogel (GH) composites. The composites were successfully synthesized through the simple one-step hydrothermal method with 3D flower-like Bi 2 WO 6 efficiently distributed on the 3D porous networks of GH. Under optimum conditions, the PEC sensor exhibited a wide linear range of 5.0 × 10 −12 –1.0 × 10 −7 M for 4NP with a low detection limit of 5.78 × 10 −13 M. MIPs/Bi 2 WO 6 @GH/ITO was further successfully applied for 4NP assay in PM 2.5 . The results indicated that the developed PEC sensor had broad applications for NPs detection in the environmental fields.
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高影响因子
危险品化学品经营许可证（带存储）