In this study, EDTA functionalized corncob (EDTA-corncob) and EDTA/graphene oxide (EDTA-GO/corncob) were prepared using disodium ethylenediamine tetraacetic acid the graphene immersion method. EDTA-corncob EDTA-GO/corncob characterized by SEM FTIR spectroscopy. On basis, adsorption properties of studied with crystal violet as adsorbate. The optimum conditions determined effect samples on at different times, temperatures pH, reusability was studied. results showed that capacity higher...

Agricultural waste winter melon peel was used as raw material adsorbent material. In order to improve adsorption characteristic, this modified with NaOH (AWMP). The AWMP characterized by IR, XRD and XPS. performance of on Cu (II) Pb in aqueous solution were investigated.The effects the initial concentration Cu(II) Pb(II), contact time, pH, temperature are studied batch adsorption. kinetics shows that equilibrium reached 60 min is favored above pH 5.0. highest capacity for Langmuir isotherm...

A novel triethylene tetramine-functionalized magnetic graphene oxide chitosan composite material (TETA-MGO/CS) with a high adsorption capacity for the phosphate was prepared by chemical coprecipitation and subsequently modified tetramine. TETA-MGO/CS characterized Fourier transform infrared spectroscopy, transmission electron microscopy, vibrating sample magnetometry, X-ray diffraction, thermogravimetry, Brunauer–Emmett–Teller analyses. The experiments of on were compared MGO, MGO/CS,...

Magnetic graphene oxide modified with 1-amine-3-methyl imidazole chloride ionic liquid (LI-MGO) was prepared through a chemical co-precipitation method. Adsorption properties were evaluated by adsorption experiments four kinds of anionic and cationic dyes.

A novel polyamine-type starch/glycidyl methacrylate (GMA) copolymer with a high capacity for the adsorption of heavy metal ions was prepared via graft copolymerization GMA and corn starch subsequent amination reaction between amino group diethylenetriamine epoxy in GMA. The copolymers were characterized by Fourier transform infrared spectrometry, X-ray diffraction scanning electron microscopy, properties on modified Cu(II), Pb(II), Cd(II) Cr(III) studied. By analysing relationship pH,...

A new stable six-membered cyclic germylene radical C (•L3Ge:; •L3 = •[CH3C(PhCN–Dip)2]2–, where Dip 2,6-iPr2C6H3) has been synthesized and structurally characterized. Unlike the germanium-centered (L1•Ge:, L1 [HC(tBuCN–Dip)2]−), is a π-type with spin density mainly distributed on NC3N backbone, similar to that in B (•L2Ge:; •L2 •[PhC(PhCN–Dip)2]2–). The electronic effects N-heterocyclic germanium radicals were systematically investigated using functional theory calculations. type of radical,...

A novel amidoxime-functionalized chelating resin (PAO-g-PS) was prepared through a two-step method. First, poly (acrylonitrile) grafted onto chloromethylated polystyrene beads via surface-initiated atom transfer radical polymerization, and then the nitrile group converted to amidoxime by reaction with hydroxylamine. Fourier transform infrared spectrometry X-ray photoelectron spectroscopy were used characterize structure of resin. The adsorption properties evaluated Fe(III), Cr(III), Cd(II),...

This paper explored the method of combining atom transfer radical polymerization (ATRP) technology and hyperbranched polymer principle to prepare high capacity chelating resin. First, surface-initiated (SI-ATRP) was used graft glycidyl methacrylate (GMA) on chloromethylated cross-linked styrene-divinylbenzene resin, then novel polyamine resin with a kind structure prepared through amination reaction between amino group (2-aminoethyl) triamine epoxy in GMA. had selective effect As(V) Cr(VI)...

A novel adsorbent, bioglass nanospheres (BGN), has been prepared by a facile process. The BGN were spheres with an amorphous structure and relatively high specific surface area, as indicated SEM, transmission electron microscopy, BET, FTIR, XRD. This paper was aimed at evaluating the adsorption behavior of this new material for adsorptive removal cationic (methylene blue, neutral red) anionic (congo dyes from aqueous solution. effects initial dye concentration, contact time, solution pH,...

A nonchromatographic isolation of a 2-alkyl-2H-triazole from 1:1 mixture with the corresponding 1-alkyl-1H isomer was developed in scalable synthesis synthetic intermediate for NK3 receptor antagonists. Based on fundamental nucleophilicity difference isomeric triazoles, this method could be used as general tactic 2H-triazoles.

A coal‐based activated carbon was treated chemically with nitric acid, sodium hydroxide and ammonia for its surface modification, adsorption capacity investigated bromate. Several techniques were used to characterize the physicochemical properties of these materials including BET, XPS, pHpzc Boehm titration. The results indicated that specific area decreased after oxidation acid. But amount acidic oxygen‐containing functional groups oxidized sample increased compared raw points zero charge...

Abstract A fluorometric sensor based on poly (β- cyclodextrin/chitosan) with H bonded S QDs/CTSCD nanocomposites was synthesized by self-assembly. They were characterized FTIR, UV–Vis spectroscopy, XPS, and TEM. The QDs the chain of polymer could coordinate transition-metal ions due to surface electronegativity. distance between different chains construct bridge bond S–Ag + –S silver leading fluorescence aggregation-caused quenching. linear range method from 1.0×10 -5 -5.5×10 −5 mol/L....

Objective To observe the restraint strap with auxiliary lower limbs braking effect on sleep status of patients after global cerebral angiography. Methods A total 400 patients, who performed angiography admitted at Department Neurology, Chinese PLA General Hospital from January to August 2014, were randomly divided into observation group and control group, each 200 cases. The in maintained operative limb straight for 12 hours then kept prostration 24 hours, but rest body could move...