APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Yanlin Zhang,Peihong Liu,Honghai Wu
One-dimensional (1D) nanowire material (especially nonmetal doped 1D nanowires) synthesized by a facile way is of great significance and greatly desired as it has higher charge carrier mobility and lower carrier recombination rate. N, S-codoped TiO 2 nanowires were synthesized using titanium sulfate as a precursor and isopropanol as a protective capping agent by a hydrothermal route. The obtained doped nanowires were characterized by XRD, SEM, HRTEM, SAED, XPS, BET and UV–vis absorption spectrum. The incorporation of N and S into TiO 2 NWs can lead to the expansion of its lattice and remarkably lower its electron-transfer resistance. Photocatalytic activity measurement showed that the N, S-codoped TiO 2 nanowires with high quantum efficiency revealed the best photocatalytic performance for atrazine degradation under visible light irradiation compared to N, S-codoped TiO 2 nanoparticles and S-doped TiO 2 nanowires, which was attributed to (i) the synergistic effect of N and S doping in narrowing the band gap, separating electron–hole pairs and increasing the photoinduced electrons, and (ii) extending the anatase-to-rutile transformation temperature above 600 °C.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2014
·
IF 2.216
Jian-Xiong Li,Lei Liu,An-Hua Liu
N-substituted diazabicyclononanes with different benzylic substituents were synthesized by hydrogenating diazabicyclononene with LiAlH 4 and alkylating secondary amine with halobenzyl derivatives. The synthesized diazabicyclononanes were identified with NMR spectrometry ; the UV absorption and fluorescence emission of the diazabicyclononanes were examined with spectroscopes; the reactivity of the diazabicyclononane as radical photoinitiator and photolatent base were evaluated with DSC , FTIR spectroscope and gel fraction determination; the effects of substituents on the photoactivities of the diazabicyclononanes were investigated. Electron conjugation in the substituents played a prominent role on the photoactivity. As the conjugation extended, the extinction coefficient increased and fluorescence decreased; meanwhile, the UV absorption expanded towards low frequency. For diazabicyclononane N-substituted with 4-methylene benzophenone, the maximum absorption appeared around 256 nm with extinction coefficient 1.78×10 4− mol −1 L cm −1 . It could work as radical photoinitiator and photolatent base simultaneously. With this diazabicyclononane, epoxy acrylate could be UV cured within seconds and the activation temperature of epoxy/anhydride could be reduced 50 °C after UV excitation. The gel fraction of acrylate/epoxy hybrid resins could be about 90% after UV-thermal dual curing.
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2014
·Vol. 113
·期 1
·281-292
·
IF 0.983
Huang Ji-guo,Zheng Meng-yang,Pang Shuo,Liu Li-guo,Zhao Xiao-guang,Dong Li-li,Liu Xing-juan
N–Si co-doped TiO 2 nanoparticles for the photodegradation of phenol were prepared by SiCl 4 and TiCl 4 co-hydrolysis and the effect of H 2 O 2 modification was studied. The characterization results revealed that the Si doped into the TiO 2 lattice was limited and the redundant silicon existed in segregated amorphous silica. The average crystallite size of the photocatalysts reduced from 14.8 to 5.5 with increasing Si doping ratio. The absorption edges of the as-prepared samples got an obvious red shift in which the best one reached 526 nm. N and Si co-doped into the photocatalysts replaced Ti and formed the Ti–O–Si and O–Ti–N link-ages. The photocatalysts modified by H 2 O 2 were well dispersed and changed the molecular structure. The degradation effect of the used Si doped photocatalysts was better than for undoped photocatalysts, and the H 2 O 2 modification could not further enhance the photocatalytic activity for N–Si doped TiO 2 . For the photodegradation of phenol, the optimal molar ratio of Si/Ti and the calcination temperature was 1:4 and 650 °C, respectively. For the optimal photocatalyst, the molar ratios of O/Ti, N/Ti, and Si/Ti were 0.54, 0.19, 0.29, and the phenol removed 94.4 % in 6 h under solar light. The reusability of N–Si co-doped TiO 2 was relatively good.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2014
·Vol. 32
·期 5
·410-416
·
IF 1.04
Chunhai Liu,Qihui He,Zheng Zhang,Yangyang Su,Renfu Xu,Baixing Hu
Four BrØsted acid ionic liquids (ILS) [MMP][DMP], [MEP][DEP], [HMP][DMP] and [HEP][DEP] were synthesized and used as extractants for desulfurization of aromatic sulfur compounds in model oil. The mutual solubility of four ILs were investigated. The extraction equilibrium of four ILs could be reached in as soon as 5 min and the extraction capability followed the order [MMP][DMP]>[MEP][DEP]>[HEP][DEP]>[HMP][DMP]. The S extraction showed the highest efficiency under the conditions of 30°C, 30 min and 1:1 ( V / V ) IL:oil. Under the optimal condition, 70.9% of thiophene (TS), 76.9% of benzothiophene (BT) and 87.5% of dibenzothiophene (DBT) in n -octane could be efficiently removed by [MMP][DMP]. The multiple extraction and regeneration performance of [MMP][DMP] for TS was also investigated and the results were satisfying. These results suggest that [MMP][DMP] has the best extraction capability and can serve as a promising solvent for extractive desulfurization of fuel oils.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 64
·40581-40590
·
IF 3.108
Xiao Fang,Yanchun Shi,Kejing Wu,Junmei Liang,Yulong Wu,Mingde Yang
The addition of phosphotungstic acid (PTA) to the synthesis mixture of PdCu@FeIII–MOF-5 yields the direct encapsulation of PTA inside the MOF structure (i.e. PTA@PdCu@FeIII–MOF-5) through a facile solvothermal approach. The deoxygenation reaction of palmitic acid has been investigated over PdCu@FeIII–MOF-5 and PTA@PdCu@FeIII–MOF-5 under a hydrogen atmosphere in the supercritical fluid (SCF) of n-hexane. The results showed that palmitic acid can be converted completely at 240 °C on PTA@PdCu@FeIII–MOF-5 with a high selectivity of hexadecane. Owning to the improvement of acidity of the MOF catalyst by the encapsulation of PTA inside the hollow octahedral nanostructures of PdCu@FeIII–MOF-5, the selectivity for hexadecane over the PTA@PdCu@FeIII–MOF-5 catalyst is higher than that over PdCu@FeIII–MOF-5. The excellent performance in the catalytic hydrodeoxygenation (HDO) of palmitic acid is associated with the synergistic effect between yolk–shell PTA@PdCu@FeIII–MOF-5 nanostructures and SCF medium.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2016
·
IF 2.857
Jing-Bo Liu,Yu-Xin Li,Xiu-Lan Zhang,Xue-Wen Hua,Chang-Chun Wu,Wei Wei,Ying-Ying Wan,Dan-Dan Cheng,Li-Xia Xiong,Na Yang,Hai-Bin Song,Zheng-Ming Li
To discover potent insecticides targeting ryanodine receptors (RyRs), a series of novel anthranilic diamides analogues (12a–12u) containing N-substituted phenylpyrazole were designed and synthesized. These compounds were characterized by 1H NMR, 13C NMR, and HRMS, and the structure of compound 12u was confirmed by X-ray diffraction. Their insecticidal activities indicated that these compounds displayed moderate to excellent activities. In particular, 12i showed 100 and 37% larvicidal activities against oriental armyworm (Mythimna separata) at 0.25 and 0.05 mg L–1, equivalent to that of chlorantraniliprole (100%, 0.25 mg L–1; and 33%, 0.05 mg L–1). The activity of 12i against diamondback moth (Plutella xylostella) was 95% at 0.05 mg L–1, whereas the control was 100% at 0.05 mg L–1. The calcium-imaging technique experiment results showed that the effects of 12i on the intracellular calcium ion concentration ([Ca2+]i) in neurons were concentration-dependent. After the central neurons of Helicoverpa armigera were dyed by loading with fluo-5N and treated with 12i, the free calcium released in endoplasmic reticulum indicated the target of compound 12i is RyRs or IP3Rs. The activation of RyRs by natural ryanodine completely blocked the calcium release induced by 12i, which indicated that RyRs in the central neurons of H. armigera third-instar larvae is the possible target of compound 12i.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2017
·
IF 2.464
Dong Liu,Chengsha Wei,Guanyun Yan,Guangai Sun
A series of well-defined double hydrophilic block copolymers Poly ( N -isopropylacrylamide)- b -poly (2-vinylpyridine) (PNIPAM 38 - b -P2VP 43 ) were synthesized. The ‘schizophrenic’ behavior and the aggregation process of PNIPAM- b -P2VP in response to temperature and pH in dilute aqueous solution were tested via transmittance measurements, dynamic light scattering (DLS), and small-angle neutron scattering (SANS). The results revealed that: i) both PNIPAM-core and P2VP-core micelles can be induced from an intermediate unimers state via the adjustment of temperature and pH; ii) The lower critical solution temperature (LCST) of PNIPAM homopolymers is narrowly in the range of 31–34 °C, while PNIPAM- b -P2VP diblock copolymers at pH = 7 and 2 have broad LCSTs of 25–40 °C and 41-50 °C, respectively; iii) SANS results show that only the PNIPAM- b -P2VP solution at pH = 7 and 50 °C (both blocks are hydrophobic) has a sphere form factor with diameter of about 110 nm.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2017
·
IF 2.31
Jianzhou Cai,Wu Zhang,Jiake Xu,Wei Xue,Zonghua Liu
Chitosan, as a potential vaccine delivery material, has obtained much attention for immunization prevention and therapy. However, its poor water solubility brings inconvenience for the practical applications. To address this issue, researchers have carried out many chemical modifications to prepare water-soluble chitosan derivatives for vaccine delivery. In this work, we prepared a chitosan derivative N-phosphonium chitosan with excellent water solubility and explored its potential as an intramuscular vaccine delivery system by using ovalbumin as a model antigen. Different vaccine formulations were intramuscularly injected into test mice. Through an immunohistochemistry assay, N-phosphonium chitosan-based antigen formulation could promote antigen arrival from injection site to the secondary lymph organ spleen. Further immunization results showed that 1 mg/ml N-phosphonium chitosan-based vaccine formulation could contribute to significantly higher level of antigen-specific immune responses, including higher antigen-specific IgG antibody titer, splenocyte proliferation, and cytokines secretion (interferon-γ, interleukin-10, and interleukin-4) by the splenocytes of the immunized mice. From the results, the water-soluble chitosan derivative N-phosphonium chitosan could be developed as a potential antigen carrier for immunization prevention and therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2017
·Vol. 142
·期 17
·3212-3218
·
IF 3.885
Yu-Fang Ma,Fang Yuan,Xiao-Hui Zhang,Ying-Lin Zhou,Xin-Xiang Zhang
The enrichment of glycopeptides plays an important role in glycoproteomics. In this paper, a covalent-organic framework called TpPa-1, synthesized by the Schiff base reaction of 1,3,5-triformylphloroglucinol and paraphenylenediamine, was first successfully utilized as a hydrophilic porous material for N-linked glycopeptide enrichment. Using this material, interference from non-glycopeptides could be efficiently eliminated, which facilitated the mass spectrometry detection of glycopeptides. By capturing N-linked glycopeptides from tryptic digests of human IgG, our method was proved to have high sensitivity at the femtomole level. And it showed superior selectivity for glycopeptides even when non-glycopeptides were 1000 times more concentrated. Due to the strong covalent bonds, this material possessed good stability and could be repeatedly used for at least 10 times. The ultra-low mass density and abundant binding sites also provided it with high binding capacity (178 mg g−1, IgG/TpPa-1). Moreover, N-linked glycopeptides were easily enriched by this material from only 10 μL human serum, which demonstrated its potential in pretreatment of complex biological samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Honghong Liu,Hong Gong,Mingming Zou,Heng Jiang,Rasaki Sefiu Abolaji,Ayesha Khan Tareen,Branislav Viliam Hakala,Minghui Yang
Mo-N-co-doped mesoporous TiO 2 microspheres were synthesized via a solvothermal method, followed by nitriding treatment under ammonia gas flow. The efficiency of the samples was investigated by monitoring the degradation of Rhodamine-B under visible light irradiation. The experimental results revealed that Mo-N-co-doped mesoporous TiO 2 microspheres showed better performances than Mo-TiO 2 microspheres. It was observed that; 0.1% molar quantity of Mo doped on TiO 2 at 500 °C for 2 h under nitriding conditions gave highest photocatalytic activities. The nitridation under ammonia gas of Mo-TiO 2 samples created oxygen vacant sites and led to incorporation of substitutional and interstitial Nitrogen. The enhanced visible light photocatalytic activities of Mo-N-co-doped TiO 2 photocatalyst was attributed to the large surface areas, narrow band gap and intense light absorbance in visible region. This study may create a promising and eco-friendly method towards synthesis of metal and non-metals co-doped on semiconductor materials to improve their photocatalytic activities and applications.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Min Jiang,Xueping Cao,Dandan Zhu,Yongxin Duan,Jianming Zhang
A core-shell structure composite, zeolitic imidazolate framework @ cetyltrimethylammonium bromide (ZIF-8@CTAB) was synthesized by CTAB micelle controlling the growth of ZIF-8 in aqueous systems. Direct carbonization of ZIF-8@CTAB at a high temperature produced the nitrogen-doped hierarchically porous carbon (named as PC1000@C). In comparison with the carbonization product of pure ZIF-8 (named as PC1000), PC1000@C possesses the higher specific surface area and two-times larger total pore volume. The results from elemental analysis shows the higher N content in PC1000 sample, while X-ray photoelectron spectroscopy curve-fitting shows the higher quaternary-N content in PC1000@C sample. The hierarchical microporous/mesoporous structure, high surface area and favorable N species in PC1000@C play an active role in catalyzing oxygen reduction reaction (ORR). The specific capacitance of porous carbon was calculated from the galvanostatic-discharge curve. PC1000@C exhibits a large specific capacitance of 225 F g −1 at a current density of 0.5 A g −1 and still retains 92% of initial capacitance after 1000 galvanostatic charge-discharge cycles.
✓ 已验证
产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 33
·期 5
·1692-1697
·
IF 1.408
Yue Hongya,Liu Zhigang
Density and surface tension have been measured for mixtures of biodiesel+ n -butanol, biodiesel+diesel, and diesel+ n -butanol over the entire concentration range at 283.15 K and 293.15 K and atmospheric pressure, with the combined expanded uncertainties of 1.32 kg·m −3 and 1%, receptively. Densities were determined by a single-sinker densimeter; surface tensions were measured using the surface laser light scattering method. The experimental data showed that densities and surface tensions decreased as temperature increased. The excess surface tensions and excess densities were all negative, and further fitted to the Redlich-Kister equation.
✓ 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）