SOLID STATE SCIENCES
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2019
·
IF 2.155
Yunfei Li,Fei Liang,Huimin Song,Wang Liu,Zheshuai Lin,Guochun Zhang,Yicheng Wu
A new pyrophosphate crystal, CsLiMgP 2 O 7 , was successfully synthesized using the high-temperature solution method. It crystallizes in the orthorhombic system with space group Pnma (No. 62). CsLiMgP 2 O 7 features a [LiMgP 4 O 18 ] 6-membered ring fundamental building block composed of four PO 4 and two Li/MgO 4 tetrahedrons, which connected with each other to form an interesting 6-membered ring chain. The DSC analysis proves that CsLiMgP 2 O 7 melts congruently. The spectral analyses were performed on the title compound, and the relationship between the electronic structures and optical properties has also been investigated by theoretical calculations.
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Nanoscale
·
2019
·Vol. 11
·期 19
·9444-9456
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IF 6.97
Xinyi Lian,Zhou Chen,Xiang Yu,Tingting Fan,Yunyun Dong,Hesheng Zhai,Weiping Fang,Xiaodong Yi
To solve the intrinsic deficiency inherited from the large band gap of ZnSn(OH)6 (ZSH), a gradual sulfur doping strategy is first proposed here to expand the optical absorption range, improve the separation efficiency of photogenerated electron–hole pairs, and thus enhance the photocatalytic activity. It is demonstrated that the distribution of sulfur in the flower-like ZSH (the sulfur doped sample is denoted as S-ZSH) tends to be largest on the outer most surface and becomes smaller towards the interior. The S-ZSH therefore has a gradual bandgap structure that is beneficial for transferring photogenerated charge carriers from the interior to the surface, which will greatly enhance the utilization of photoelectrons. As a result, the visible light photocurrent density of S-ZSH and the photocatalytic degradation rate of rhodamine (RhB) are about 5 and 10 times higher than with pristine ZSH, respectively.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Yanjun Liu,Ping Na,Jitao Chen,Yulong Xie
K 2 Zn 3 [Fe(CN) 6 ] 2 @ Ni-P (KNiP) composites with high cesium selectivity were synthesized for the first time. Nickel phosphorus (NiP) was used as a solid base for the adsorption of K 2 Zn 3 [Fe(CN) 6 ] 2 (KZnHCF). The synthesized KNiP composites were characterized by SEM, TEM, XRD , VSM and BET. The characteristic results demonstrated that the composites possess a ball-shape structure, a large surface area of 305.031 m 2 /g and high saturation magnetization of 2.95 emu/g. The ICP-OES analyser was used to determine the concentration of ions in this study. KNiP showed good cesium adsorption performance over a wide pH range and high selectivity for cesium over coexistent competing ions. Analysis of dynamics showed that KNiP has good adsorption performance toward cesium, with an adsorption capacity of 54.95 mg/g. Equilibrium was achieved within only two hours and the experimental data fit the Pseudo second-order model, indicating that the adsorption process was chemisorption . The adsorption process followed the Freundlich isotherm model, indicating that it mainly occured on a heterogeneous surface.
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ACS Applied Materials & Interfaces
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2018
·
IF 8.097
Youdan Zheng,Rui Wang,Xiangyu Dong,Lixin Wu,Xu Zhang
The rapidly growing fields of aerospace, energy, and electronic devices raise the demand for materials with ever-increasing mechanical properties and electrical and thermal conductivity. However, the combination of unusual high performance is difficult to attain. In this study, using prebuilt three-dimensional (3D) closely packed interconnected multiwalled carbon nanotube (MWNT) networks as a backbone for assembly of polymer matrix, a novel, green (solvent-free), and energy-saving method to prepare robust, highly electrical, and thermal conductive polyamide nanocomposites is reported. The as-prepared nanocomposites exhibit significant enhancements of 16 orders of magnitude in electrical conductivity and 505% in thermal conductivity, which mainly benefits from the contributions of closely packed 3D networks and conductive pathways of carbon nanotubes. In addition, even at a high MWNT loading of 25 wt %, the as-prepared nanocomposites still possess a high tensile strength of 99.4 MPa and Young’s modulus of 5.3 GPa. The performance of the as-prepared nanocomposites exceeds that of most of the composites, which confirms the potential of the prebuilt MWNT network method for fabricating robust and highly conductive nanocomposites and the importance of good interconnectivity of nanofillers–nanofillers and nanofillers–matrix. The special fabrication method could open up a broad range of possibilities for aerospace, conducting elements, and structural nanomaterials, as well as electronic components with the requirements of heat dissipation, mechanical strength, thermal repair, corrosion resistance, and so on.
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JOURNAL OF MEMBRANE SCIENCE
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2018
·
IF 6.578
Shun Ren,Dongqing Liu,Yingbo Chen,Shulin An,Yiping Zhao,Yufeng Zhang
Membranes of anion channels in matrix were constructed through amphiphilic self-assembly of polyelectrolyte , SO 3 H group containing polyamide 6 (SPA6). SPA6 molecules self-aggregated into 255 nm micelles with negative charges at the surface in casting solution. Micelles switched into nanofibers , which formed pompoms of divergent arrangement of nanofibers from the center after immersed in coagulation bath. They adhered and piled up to construct the membrane. Charged groups were remained at the surface of pompoms during solidification. The gaps between spheres provided channels full of anions, which supplied great repulsion to anions. It endowed membranes the potential to remove anion dyes from aqueous solution. The rejection was up to 99.73% for 500 mg/L Congo red and 85.68% for 100 mg/L Acid blue 93 and 63.06% for 100 mg/L Methyl orange after first filtration. Total removal percentage was 95.48% for Acid blue 93 and 79.51% for Methyl orange after second filtration. Self-aggregation of dye molecules also helped their high removal efficiency. Flux of film 30 M of 100 mg/L CR solution dropped to 67.34% and rejection rate was higher than 95% in 1500 min. Flux could be brought back to more than 90% of the original values after washed by deionized water , suggesting that 30 M had good anti-fouling capacity. SPA6 membranes displayed a potential for effective treatment of textile wastewater.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2018
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IF 1.712
Chongwen Jiang,Jundong Zhu,Bing Wang,Lu Li,Hong Zhong
Zirconium doped mesoporous KIT-6 samples with different Si/Zr ratios were synthesized by the direct hydrothermal method. Various characterization techniques confirm that highly distributed ZrO 2 nanoparticles and multi-coordinated Zr 4+ species are incorporated in the mesoporous composites. One-pot synthesis of 5-hydroxymethylfurfura(HMF) from glucose was examined in the presence of Zr-KIT-6(20) the molar ratio of Si to Zr is 20 under aqueous system. The effects of temperature, reaction time, catalyst dosage and biphasic solvent system on the conversion of glucose and the HMF yield were investigated. It was found that the glucose conversion and the HMF yield have been improved from 54.8% to 79.0% and from 19.5% to 34.5% in the biphasic MIBK-water system, respectively. Both the acidity of Zr-KIT-6(20) and the biphasic MIBK-water system are responsible for the improved performance of glucose dehydration to HMF.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 133
·期 6
·
IF 1.768
Maolin Li,Yuhua Zhong,Zheng Wang,Andreas Fischer,Florian Ranft,Dietmar Drummer,Wei Wu
A novel flame-retardant composite was prepared by introducing a phosphorus-nitrogen flame retardant and DOPO-SiO 2 into PA6. DOPO-SiO 2 was synthesized successfully in a one-step process. PA6/OP1314/DOPO-SiO 2 achieved a UL 94 V-0 rating with an LOI value of 31%. The maximum mass loss rate of decomposition decreased significantly and char residue increased to 11.6 wt % compared with that of pure PA6. The compacted and dense char was formed due to the combination of the P-N flame retardant and DOPO-SiO 2 . The complex viscosity of PA6/OP1314/DOPO-SiO 2 increased considerably which tend to prevent the dripping phenomenon. The flame-retardant mechanism of PA6/OP1314/DOPO-SiO 2 was also investigated by Fourier transform infrared spectroscopy FTIR at different temperatures and the pyrolysis products were investigated by pyrolysis gas chromatography/ mass spectrum (Py-GC/MS). It was assumed that DOPO-SiO 2 and the hypophosphite of OP1314 possess excellent flame retardancy during the gaseous phase. Meanwhile, melamine and phosphate reacted with the pyrolytic products of PA6 to protect the matrix during the condensed phase. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42932.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2014
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IF 2.129
Zhengjuan Sun,Yali Liu,Yuanfang Li
A novel and rapid spectrofluorometry method for the recognition of 6-mercaptopurine (6-MP) has been developed based on luminescent metal–organic frameworks Fe-MIL-88NH 2 as fluorescent probe. The strong fluorescence of Fe-MIL-88NH 2 at 430 nm could be quenched by 6-MP directly, and the Fe-MIL-88NH 2 shows high selectivity for 6-MP compared to other thiol-containing amino acids such as homocysteine (Hcy), cysteine (Cys), glutathione (GSH), etc. Under optimal conditions, the relative fluorescence intensity was linearly proportional to the concentration of 6-MP in the range of 5–600 μM with the detection limit at 1.17 μM (S/N = 3). Furthermore, the present approach has been successfully applied to the determination of 6-MP in human serum samples. The possible fluorescence quenching mechanism has also been investigated, where it is revealed that the quenching was attributed to competition of absorption of the light source energy as well as electron transfer between Fe-MIL-88NH 2 and 6-MP.
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高影响因子
Marine Drugs
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2017
·Vol. 15
·期 9
·284
·
IF 3.503
Wenbo Dong,Weiping Li,Yu Chen,Yanchun Ye,Shaohua Jin
In the present work, a fluorescent H2O2biosensor was constructed by encapsulating fluorescent probe Rhodamine B (RhmB) in the hydrophobic cavity of the cyclodextrin (β-CD) and immobilizing catalase (CAT) on the 2-NH2of chitosan (CTS) in a chitosan 6-OH immobilized β-cyclodextrin derivative (CTS-6-CD). The inclusion complex of CTS-6-CD to RhmB (CTS-6-CD-RhmB) was prepared by a solution method. Its structure and inclusion efficiency were determined by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and fluorescence spectroscopy (FL). CAT was immobilized on CTS-6-CD-RhmB to eventually form the functional membrane, CTS-6-CD-RhmB-CAT, via glutaraldehyde crosslinking, which was further characterized by FTIR and FL, and used as a H2O2biosensor. The functional membrane was used to simultaneously oxidize and detect H2O2. The detection condition was optimized as pH 8, a reaction temperature of 25 °C, and an immobilized enzyme concentration of 2 × 10−4mol/L. The fluorescence response of the biosensor exhibited a good linear relationship with the concentration of H2O2in the range of 20 mΜ–300 μM and the detection limit of 10−8mol/L.Keywords:chitosan;catalase;β-cyclodextrin;Rhodamine B;fluorescent biosensor
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2017
·
IF 3.649
Qilong Wang,Qiuyu Wei,Qiuxuan Yang,Xia Cao,Qiang Li,Feng Shi,Shan Shan Tong,Chunlai Feng,Qingtong Yu,Jiangnan Yu,Ximing Xu
[6]-Gingerol, one of the components of the rhizome of Ginger, has a variety of biological activities such as anticoagulant, antioxidative, antitumor, anti-inflammatory, antihypertensive, and so forth. However, as one of the homologous phenolic ketones, [6]-gingerol is insoluble in water which limits its applications. Herein, we prepared [6]-gingerol proliposomes through modified thin-film dispersion method, which was spherical or oval, and physicochemically stable with narrow size distribution. Surprisingly, in vitro release of [6]-gingerol loaded proliposome compared with the free [6]-gingerol was significantly higher and its oral bioavailability increased 5-fold in vivo. Intriguingly, its antitumor effect was enhanced in the liposome formulation. Thus, our prepared [6]-gingerol proliposome proved to be a novel formulation for [6]-gingerol, which significantly improved its antitumor effect.
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Journal of Energetic Materials
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2017
·
IF 1.557
Xi Li,Qiu-han Lin,Xin-Ying Zhao,Zhi-Wei Han,Bo-liang Wang
Thermal techniques (differential scanning calorimetry (DSC) and the vacuum stability test (VST)), according to STANAG 4147, and non-thermal techniques (Fourier transform infrared (FTIR) spectrometry and X-ray diffractometry (XRD)) were used to examine compatibility issues for 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (CL-20) with a selection of insensitive explosives, including nitroguanidine (NQ), 2,4,6-trinitrotoluene (TNT), 2,6-diamino-3,5-dinitropyridine-1-oxide (ANPyO), 2,4,6-triamino-1,3,5-trinitrobenzene (TATB), 3-nitro-1,2,4-triazol-5-one (NTO) and 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105). DSC measurements showed that ANPyO, TATB, NTO and LLM-105 were compatible with CL-20. The compatibility of CL-20/NQ, CL-20/TNT, CL-20/ANPyO, CL-20/TATB, CL-20/NTO and CL-20/LLM-105 mixtures was further explored using the VST, which revealed that all the selected insensitive explosives were compatible with CL-20. Possible chemical interactions were suspected for CL-20/TATB from the FTIR results and for CL-20/NTO from XRD analysis. In summary, ANPyO and LLM-105 demonstrated the optimal compatibility with CL-20.
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Journal of Functional Foods
·
2016
·
IF 3.973
Yang Xu,Qilong Wang,Yingshu Feng,Caleb Kesse Firempong,Yuan Zhu,Emmanuel Omari-Siaw,Yuanyuan Zheng,Zunqin Pu,Ximing Xu,Jiangnan Yu
The purpose of this study was to develop a [6]-Gingerol-loaded self-microemulsifying drug delivery system ([6]-Gingerol-SMEDDS) for oral administration and enhanced bioavailability of the drug. The [6]-Gingerol-SMEDDS, consisting of oils (ethyl oleate), surfactant (Cremophor EL35) and co-surfactant (1,2-propanediol), showed an acceptable spherical nanoparticle with stable physicochemical properties such as the mean droplet size (73.06 ± 0.49 nm), zeta potential (−2.45 ± 0.41) and encapsulation efficiency (89.40 ± 1.11%). The in vitro release of [6]-Gingerol from the delivery system in the three different media (HCl, pH 1.2; Double distilled water, pH 7.0; phosphate buffer solution, pH 7.4) was significantly higher than in the free drug. The [6]-Gingerol-SMEDDS also exhibited prolonged plasma circulation which led to 6.58-fold increase in oral bioavailability compared with the free drug. These findings indicated that the developed [6]-Gingerol-SMEDDS could be a promising alternative in improving the solubility and oral bioavailability of [6]-Gingerol, as well as increasing its biological applications.
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