Crystallized Zn3(OH)2V2O7·nH2O: Hydrothermal synthesis and magnetic property

Ni, Shibing; Lin, Shumei; Pan, Qingtao; Huang, Kai; Yang, Feng; He, Deyan

doi:10.1016/j.jallcom.2008.10.024

Cited by 31 publications

(9 citation statements)

References 25 publications

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“…7b . 53 The vanadium(V) adsorption onto Zn-BC at pH ¼ 11 signicantly decreased, possibly because of competition between vanadium anions and OH À for effective adsorption sites. Additionally, leaching of Cs(I), Zn(II), and Zr(IV) from the modied biochars was measured via ICP-OES during the adsorption processes.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Development, modification, and application of low-cost and available biochar derived from corn straw for the removal of vanadium(v) from aqueous solution and real contaminated groundwater

et al. 2018

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In this work, a low-cost and available material for use as a permeable reactive barrier (PRB) to prevent vanadium in groundwater from leaking into river water was developed. Three modified biochars were prepared from available corn straw pretreated with CsCl, Zn(II), and Zr(IV) to enhance ion exchange capacity (IEC) and specific surface area, and were designated as Cs-BC, Zn-BC, and Zr-BC, respectively. These materials were characterized via IEC, N 2 adsorption-desorption, Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses. The Langmuir isotherm model could be applied for the best fit for the adsorption data of Cs-BC and Zr-BC, indicating that vanadium(V) sorption occurred in a monolayer. The vanadium(V) adsorption capacities of Cs-BC, Zn-BC, and Zr-BC were 41.07, 28.46, and 23.84 mg g À1 , respectively, which were 3.22-5.55 times higher than that of commercial activated carbon (AC) (7.40 mg g À1 ), probably because of their higher IECs and specific surface areas after modification. In addition, no heavy metal leaching was found from the modified biochars during the adsorption processes when pH > 2. According to the FTIR and XRD patterns, the adsorption mechanism of Cs-BC and Zr-BC was ion exchange, whereas for Zn-BC, it was mainly surface precipitation and electrostatic attraction. The adsorption of vanadium(V) onto the modified biochars was independent of pH in the range of 4.0 to 8.0. Furthermore, the removal efficiency of the vanadium(V) in real contaminated groundwater from the catchment of the Chaobei River by Zn-BC reached 100% at a dose of 4 g L À1. Hence, modified biochars are promising PRB filling materials for removing vanadium(V) from contaminated groundwater.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Development, modification, and application of low-cost and available biochar derived from corn straw for the removal of vanadium(v) from aqueous solution and real contaminated groundwater

et al. 2018

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“…Nakajima et al [16] reported the luminescence and color properties of the AVO 3 (A = K, Rb, and Cs) and M 3 V 2 O 8 (M = Mg and Zn) prepared by solid state reaction method. Ni et al reported preparation of Zn 3 (VO 4 ) 2 microparticles using intermediate Zn 3 (OH) 2 V 2 O 7 ⋅nH 2 O nanosheets as a precursor prepared by hydrothermal method and investigated their optical properties [17]. 1D and 2D structures such as wires, fibers, rods, ribbons, or sheets of vanadate based compounds are typically attainable by a hydrothermal reaction of vanadium precursors in the presence of long chain alkylamines [10,18].…”

Section: Introductionmentioning

confidence: 99%

Rare Earth FreeZn3V2O8Phosphor with Controlled Microstructure and Its Photocatalytic Activity

Luitel

Chand

Torikai

et al. 2013

International Journal of Photoenergy

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Microsphere of rare earth free phosphor,Zn3V2O8, with broadband yellowish white emission was synthesized by combustion route and compared with the hydrothermal, sol-gel, and solid state reaction methods. The phosphor samples were characterized by X-ray diffraction and scanning electron microscopy. UV-visible absorption and photoluminescence (PL) emission and excitation spectra were investigated for these phosphors.Zn3V2O8phosphor containing 10 mol% of H3BO3flux exhibited enhanced PL emission showing broadband from 450 nm to 750 nm. Effect of stoichiometry of Zn and V on the host lattice and its effect on the PL emission spectra were studied. Series of Mg3V2O8,Ca3V2O8, and Sr3V2O8phosphors were also synthesized and compared to theZn3V2O8phosphor in terms of PL emission and internal quantum yield, and it was found thatZn3V2O8is the most efficient phosphor among the other phosphors studied with quantum yield of 60%. The visible light irradiated photocatalytic activity of these phosphors was investigated and it was found that the hydrothermalZn3V2O8exhibited enhanced activity.

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“…However, to the best of our knowledge, there is only a few papers about Zn 3 (VO 4 ) 2 were reported by now [10,11]. Recently, we have reported hydrothermal synthesis of Zn 3 (OH) 2 V 2 O 7 ·nH 2 O [12]. As an metastable phase, Zn 3 (OH) 2 V 2 O 7 ·nH 2 O can be used as an active starting material for preparing other new advanced zinc vanadium oxide.…”

Section: Introductionmentioning

confidence: 99%