RSC Advances
·
2013
·Vol. 4
·期 12
·6048-6054
·
IF 2.562
Zhiqiang Jie,Xiufang Yan,Lianhong Zhao,Shelby Davis Worley,Jie Liang
An effective macroporous cross-linked antimicrobial polymeric resin containing N-halamine and quaternary ammonium salt moieties was synthesized in an eco-friendly and economical way. Commercially available macroporous crosslinked chloromethylated polystyrene (CMPS) resin reacted with the salt of 5,5-dimethylhydantoin (DMH) and trimethylamine (TMA) in water to produce a polymeric resin containing hydantoinyl and quaternary ammonium salt moieties, poly(p-methylstyrene)-3-(5,5-dimethylhydantoin)-co-trimethyl ammonium chloride (PSHTMA). The hydantoinyl groups in PSHTMA were converted to an antimicrobial N-halamine structure by a facile chlorination reaction in dilute NaOCl solution. The as-synthesized antimicrobial polymeric resin (Cl-PSHTMA) was characterized by FT-IR, X-ray photoelectron spectroscopy, and zeta-potential measurement. The antimicrobial tests showed that the as-synthesized antimicrobial polymeric resin was capable of 7-log inactivation of S. aureus and 8-log inactivation of E. coli within 1 minute contact time. Moreover, the N-halamine moieties in Cl-PSHTMA exhibited excellent regenerability.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Wei Li,Shu-ao He,Zi-ying Su,Wei Xu,Xue-chuan Wang
In this paper, the CuO nanoparticles (NPs) with narrow bandgap and near-infrared light response were chosen as the co-catalyst, and a series of BiOCl-CuO (BC-x, x = 1, 2 and 3) heterojunctions with superior visible light response and fast interfacial charge migration were synthesized by a facile one-pot solvothermal method. Then, the morphology, composition, crystal structure, photoelectronic properties and visible-light photocatalytic performance were studied in sequence. Research shows that the incorporation of CuO NPs can effectively enhance the photocatalytic performance of BiOCl semiconductor. For the moderate incorporation of CuO NPs, the p-n heterojunction interfaces can be fabricated between BiOCl and CuO components, so that the light response and interfacial charge migration ability can be effectively improved. Especially, when the content of incorporated CuO NPs was about 0.02 g, the BC-2 heterojunction exhibited the highest photocatalytic activity and very robust photostability in decomposing organic targeted pollutants (acid orange (AO) and bisphenol A (BPA)) and H 2 evolution reaction (HER) experiments under visible-light illumination.
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ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yujuan Chen,Yuyang Jiang,Zhaoen Liu,Lifang Yang,Quanzhou Du,Kelei Zhuo
The improvement of the wettability between electrode materials and ionic liquid electrolytes is critical to increase the performance of electrode materials for supercapacitors. Herein, we demonstrate the synthesis of a urea phosphate-derived graphene aerogel (UPGA) with good wettability by one-step hydrothermal treatment using graphene oxide (GO) as the precursor and urea phosphate (UP) as both the nitrogen dopant and hydroxyl group protector. The as-obtained UPGA has appropriate doped-N atoms, unique hierarchical porous structure, and good wettability by 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF 4 ) ionic liquid. The UPGA displays a high specific capacitance of 196.7 F g −1 at 1 A g −1 . Moreover, a symmetrical UPGA-based supercapacitor delivers an excellent energy density of 97.2 Wh kg −1 at a power density of 0.9 kW kg −1 and a good cycling stability with the capacitance retention of 78.3% after 5500 cycles at 1 A g −1 . Therefore, the UPGA exhibits great potential in supercapacitor as electrode material.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Limei Li,Yi Zuo,Qin Zou,Boyuan Yang,Lili Lin,Jidong Li,Yubao Li
To improve the mechanical properties of bone tissue and achieve the desired bone tissue regeneration for orthopedic surgery, newly designed hydroxyapatite/polyurethane (HA/PU) porous scaffolds were developed via in situ polymerization. The results showed that the molecular modification of PU soft segments by glyceride of castor oil (GCO) can increase the scaffold compressive strength by 48% and the elastic modulus by 96%. When nano-HA (n-HA) particles were incorporated into the GCO–PU matrix, the compressive strength and elastic modulus further increased by 49 and 74%, from 2.91 to 4.34 MPa and from 95 to 165.36 MPa, respectively. The n-HA particles with fine dispersity not only improved the interface bonding with the GCO–PU matrix but also provided effective bioactivity for bonding with bone tissue. The hierarchical structure and mechanical quality of the n-HA/GCO–PU composite scaffold were determined to be appropriate for the growth of cells and the regeneration of bony tissues, demonstrating promising prospects for bone repair and regeneration.
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PubMed
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MONATSHEFTE FUR CHEMIE
·
2020
·Vol. 151
·期 1
·99-106
·
IF 1.349
Li Nutao,Chen Feng,Wang Guanghui,Zeng Qingle
Abstract A ligand-free copper-catalyzed C–P cross-coupling reaction of arylmethyl quaternary ammonium salts and diarylphosphine oxides in air is developed. Arylmethyl quaternary ammonium salts with various functional groups and a variety of dialkyl- and diarylphosphine oxides afford C–P cross-coupling products with good yields. This protocol requires no inert atmosphere, no ligand, and simple operation steps. Graphic abstract
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CELLULOSE
·
2021
·Vol. 28
·期 12
·8205-8219
·
IF 5.044
Zhang Fengxiu,Liao Ying,Chen Yu,Lu Yi,Wan Caiyan,Zhang Guangxian
A novel N–P ammonium salt 1,3-propylene glycol diphosphate ester (APGDPE) flame retardant was tersely synthesized under solvent-free condition to lower cotton fabric fire hazard. The APGDPE structure was characterized by 1 H NMR, 13 C NMR, 31 P NMR and IR spectroscopy. The reactive P = O(NH 4 + ) 2 and PO(OH) 2 groups of APGDPE were successfully grafted into cotton fabric to form P–O–C covalent bond. The limiting oxygen indexes (LOI) of treatment cotton with weight gain rate of 14.7%, 17.2% and 20.8% reach 40–44.5%. After 50 laundering cycles (LCs), the LOI value of treatment cotton with weight gain rate of 20.8% still maintains 27.3%. These results verified that the treated cotton has obtained outstanding flame retardancy and prominent durability. TG test indicates that the thermal stability and thermal oxidative stability of treated cotton are much higher than those of control cotton. TG-IR test displayed that treated cotton released less flammable volatile gases than those of control cotton. Cone calorimetry revealed that the PHRR and THR values of treated cotton decreased by 5.57% and 26.8%, respectively. XRD results suggest that the crystallization zone of cotton fabric before and after treatment hardly change. TG-IR and cone calorimetry tests verified the APGDPE condensation phase mechanism for treated cotton.
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ACS Omega
·
2021
·
IF 3.512
Lin-Xi Wan,Yong-Qi Zhen,Zhen-Xiang He,Yang Zhang,Lan Zhang,Xiaohuan Li,Feng Gao,Xian-Li Zhou
A new series of N-aryltacrine derivatives were designed and synthesized as cholinesterase inhibitors by the late-stage modification of tacrine, using the palladium-catalyzed Buchwald–Hartwig cross-coupling reaction. In vitro inhibition assay against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) demonstrated that most of the synthesized compounds had potent AChE inhibitory activity with negative inhibition of BuChE. Among them, N-(4-(trifluoromethyl)phenyl)-tacrine (3g) and N-(4-methoxypyridin-2-yl)-tacrine (3o) showed the most potent activity against AChE (IC50 values of 1.77 and 1.48 μM, respectively). The anti-AChE activity of 3g and 3o was 3.5 times more than that of tacrine (IC50 value of 5.16 μM). Compound 3o also displayed anti-BuChE activity with an IC50 value of 19.00 μM. Cell-based assays against HepG2 and SH-SY5Y cell lines revealed that 3o had significantly lower hepatotoxicity compared to tacrine, with additional neuroprotective activity against H2O2-induced damage in SH-SY5Y cells. The advantages including synthetic accessibility, high potency, low toxicity, and adjunctive neuroprotective activity make compound 3o a new promising multifunctional candidate for the treatment of Alzheimer’s disease.
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PubMed
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Reaction Chemistry & Engineering
·
2020
·Vol. 5
·期 5
·886-895
·
IF 3.441
Xing-Gang Si,Yun-Peng Zhao,Qing-Lu Song,Jing-Pei Cao,Rui-Yu Wang,Xian-Yong Wei
A highly efficient Ni/N–C catalyst was synthesized by facile pyrolysis of a Ni-containing metal–organic framework (Ni-MOF), and its catalytic hydrogenolysis performance towards C–O bonds in lignin was evaluated in detail using diphenyl ether (DPE) as a model compound. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that the flower-like nanosheets of the Ni-MOF shrink, forming a loose and ordered spherical structure during pyrolysis. Under the optimal conditions, DPE was completely converted and the selectivity to monomers (benzene, cyclohexanol and cyclohexane) reached 99.1%. During the catalytic hydrogenolysis conversion (CHC) of DPE, the direct cleavage of the Caromatic–O bond affording benzene and phenol is the major reaction pathway, and a low H2 pressure is crucial to increase the monomer selectivity. Furthermore, Ni/N–C-450 shows high hydrogenolysis activity for other lignin-derived aryl ethers, such as benzyl phenyl ether, dibenzyl ether, dinaphthalene ether, benzyl 2-naphthyl ether and 3-methoxyphenol.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Tao Jiang,Ling Cheng,Yingchun Han,Jun Feng,Jingdong Zhang
A p-n heterojunction film of Bi 2 O 3 -WO 3 with enhanced photoelectrocatalytic (PEC) activity was successfully constructed by a facile one-pot hydrothermal synthesis. The as-prepared Bi 2 O 3 -WO 3 heterojunction film exhibited flower-like microstructures. Compared with pristine Bi 2 O 3 and WO 3 films, the Bi 2 O 3 -WO 3 composite film exhibited enhanced absorption in the visible region. The formation of Bi 2 O 3 -WO 3 p-n heterojunction facilitates the interfacial transfer of electrons as well as the separation of charge carries. As a result, the Bi 2 O 3 -WO 3 film showed high photocurrent response under visible light illumination. Furthermore, the enhanced visible light PEC performance of Bi 2 O 3 -WO 3 film was evaluated by the decoloration of Rhodamine B. When the Bi 2 O 3 -WO 3 film was applied to norfloxacin removal, the degradation efficiency reached 88.4% after 6 h PEC process under visible light illumination. According to nine intermediates identified by liquid chromatograph-mass spectrometric analysis, a possible PEC degradation mechanism for norfloxacin was proposed.
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MATERIALS SCIENCE FORUM
·
2017
·
IF 0
Li Peng,Jia Ni Huan,Jing Hua Gong,Jing Hong Ma
Smart hydrogel is a kind of new soft and wet material which can be responsive to external stimuli. Hydrogel fiber owning one dimension size can significantly improve response speed and be easily formed into higher-order assemblies. N-isopropylacrylamide/calcium alginate (NIPA/Ca-alginate) as-spun fiber was generated via microfluidic spinning. Then PNIPA/Ca-alginate hydrogel fiber was prepared through off-chip free radical polymerization of NIPA in the presence of Ca-alginate. The structure and morphology of the hydrogel fiber were characterized by FTIR and SEM. The swelling property and temperature-/pH-response behaviors were also investigated. The PNIPA/Ca-alginate hydrogel fiber had a 3D network porous structure. The thinner the hydrogel fiber, the faster the swelling speed was. Meanwhile, the hydrogel fiber exhibited temperature and pH response.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Limin Guo,Runze Hu,Caifu Zhong,Xinxin Wang,Jiaming Liu,Xiaohui Wang
An elegant templating method has been developed for the rational design and synthesis of hierarchical SnS 2 nanoclusters composed of ultrathin nanosheets and embedded inside TiO 2 nanoporous arrays. Herein, benefiting from their unique structural merits and metal-like plasmonic activity, the TiO 2 @SnS 2 heterostructures exhibit enhanced photocatalytic H 2 evolution properties in terms of good cycling performance. S vacancies and N-doping are proved to be vitally important to the electronic structures and bandgap of SnS 2 , thus influence the plasmonic property and separation of photo-carriers. The optimized TiO 2 @6nmSnS 2 /N nanoporous arrays give an ultra-high H 2 yield rate of 285 μmol h −1 cm −2 under a low catalyst loading mass, that comparable to most noble metal catalysts . Remarkable cycling performance with a capability retention of 90% is achieved after 30 h under solar light illumination. As an innovative exploration, this study demonstrates that the photocatalytic activities of nonmetal, earth-abundant SnS 2 can be enhanced with plasmonic effect, which may serve as an excellent catalytic agent for solar energy conversion to chemical fuel.
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ChemMedChem
·
2017
·Vol. 12
·期 4
·327-336
·
IF 3.225
Zixin Xie,Zaikui Zhang,Shufang Yu,Donghua Cheng,Huan Zhang,Chao Han,Handeng Lv,Faqing Ye
Graphical Taking the heat off : The 24 curcumin analogues in this study were found to have no toxicity toward mouse bone marrow cells, and some of them showed potent anti-inflammatory activity by inhibiting LPS-stimulated TNFα, IL-6, IL-1β, PGE2, and NO production in rat macrophages. Pharmacokinetic studies indicated that compound c6 has better bioavailability than curcumin in vivo. Both c6 and c10 may be valuable leads for the development of new anti-inflammatory agents. A total of 24 N-substituted 3,5-bis(2-(trifluoromethyl)benzylidene)piperidin-4-one derivatives were synthesized via aldol condensation, and their anti-inflammatory activities were evaluated. These compounds were found to have no significant cytotoxicity against mouse bone marrow cells in vitro. However, some compounds, such as c6 ( N -(3-methylbenzoyl)-3,5-bis-(2-(trifluoromethyl)benzylidene)piperidin-4-one) and c10 ( N -(2-chlorobenzoyl)-3,5-bis-(2-(trifluoromethyl)benzylidene)piperidin-4-one), displayed potent anti-inflammatory activity by inhibiting lipopolysaccharide (LPS)-stimulated tumor necrosis factor (TNF)-α, interleukin-6 (IL-6), IL-1β, prostaglandin E2 (PGE2), and nitric oxide (NO) production in RAW 264.7 cells. Treatment with c6 or c10 at 2.5 or 10 mg kg −1 significantly decreased the paw edema induced by carrageenan in rats, and the anti-inflammatory effects of these compounds were found to be better than those of celecoxib or indomethacin as well as their parent compound C66 (2,6-bis-(2-(trifluoromethyl)benzylidene)cyclohexanone). Pharmacokinetic analysis indicated that c6 has better bioavailability than curcumin. Therefore, these compounds may be valuable leads for the development of new anti-inflammatory drugs.
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PubMed
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